阅读说明：本技术 一种间接蒸发冷却与溴化锂吸收式制冷联合的空调机组 (Indirect evaporative cooling and lithium bromide absorption refrigeration combined air conditioning unit ) 是由 黄翔 金洋帆 薛宁静 于 2019-10-12 设计创作，主要内容包括：本发明公开了一种间接蒸发冷却与溴化锂吸收式制冷联合的空调机组,包括机组壳体,机组壳体相对应的两侧壁上分别设置有一次空气进风口和一次空气送风口,机组壳体内按照一次空气流向依次设置有空气过滤器a、间接蒸发冷却单元、直接蒸发冷却单元、蛇形冷却盘管以及一次空气送风机,蛇形冷却盘管连接有溴化锂吸收式冷水机且与溴化锂吸收式冷水机形成循环回路。本发明的一种间接蒸发冷却与溴化锂吸收式制冷联合的空调机组,将间接蒸发冷却空调机组和溴化锂吸收式冷水机联合,间接蒸发冷却充分利用了自然冷源,溴化锂吸收式冷水机实现了低品位能源的回收利用,进而降低了空调机组的能耗且全年适用。(The invention discloses an indirect evaporative cooling and lithium bromide absorption refrigeration combined air conditioning unit, which comprises a unit shell, wherein a primary air inlet and a primary air outlet are respectively arranged on two corresponding side walls of the unit shell, an air filter a, an indirect evaporative cooling unit, a direct evaporative cooling unit, a serpentine cooling coil and a primary air blower are sequentially arranged in the unit shell according to the flow direction of primary air, and the serpentine cooling coil is connected with a lithium bromide absorption water chiller and forms a circulation loop with the lithium bromide absorption water chiller. According to the air conditioning unit combining indirect evaporative cooling and lithium bromide absorption refrigeration, the indirect evaporative cooling air conditioning unit is combined with the lithium bromide absorption type water chiller, a natural cold source is fully utilized in indirect evaporative cooling, the lithium bromide absorption type water chiller realizes recycling of low-grade energy, further the energy consumption of the air conditioning unit is reduced, and the air conditioning unit is suitable for use all year round.)

1. The utility model provides an indirect evaporative cooling and lithium bromide absorption refrigeration combined air conditioning unit, its characterized in that, includes the unit casing, be provided with primary air intake (1) and primary air supply outlet (12) on the corresponding both sides wall of unit casing respectively, air cleaner a (2), indirect evaporative cooling unit, direct evaporative cooling unit, snakelike cooling coil (10) and primary air forced draught blower (11) have set gradually according to the primary air flow direction in the unit casing, snakelike cooling coil (10) be connected with lithium bromide absorption chiller (24) and with lithium bromide absorption chiller (24) form circulation circuit.

2. The air conditioning unit according to claim 1, wherein the indirect evaporative cooling unit comprises a plate-fin heat exchanger (3), a high-pressure spray water distributor a (4) and an air filter b (18) are sequentially arranged below the plate-fin heat exchanger (3) from top to bottom, secondary air inlets (19) are further formed in two side walls of a unit shell corresponding to the lower portion of the air filter b (18), a water collection tank b (16) is arranged at the bottom of the unit shell, the water collection tank b (16) is connected with the high-pressure spray water distributor a (4) through a water pipe a (7), the high-pressure spray water distributor a (4) sprays towards the plate-fin heat exchanger (3), and a secondary air exhaust outlet (6) is formed in the top of the unit shell corresponding to the upper portion of the plate-fin heat exchanger (3).

3. Air conditioning assembly according to claim 2, characterized in that a secondary air exhaust fan (5) is arranged in the secondary air exhaust outlet (6).

4. Air conditioning assembly according to claim 2, characterized in that a water pump b (17) is also arranged on the water pipe a (7).

5. Air conditioning assembly according to claim 2, wherein the primary air blower (11) is a centrifugal fan and the secondary air exhaust fan (5) is an axial fan.

6. Air conditioning assembly according to claim 1 or 2, characterized in that the direct evaporative cooling unit comprises a packing (13), a high-pressure spray water distributor b (9) is arranged above the packing (13), a water collection tank a (14) is arranged below the packing (13), the water collection tank a (14) is connected with the high-pressure spray water distributor b (9) through a water pipe b (8), and the high-pressure spray water distributor b (9) sprays towards the packing (13).

7. Air conditioning assembly according to claim 6, characterized in that a water pump a (15) is also arranged on the water pipe b (8).

8. Air conditioning unit according to claim 1 or 2, wherein the lithium bromide absorption chiller (24) comprises an evaporator (22), an absorber (30), a generator (23) and a condenser (28) which are connected in sequence and form a loop, the absorber (30) and the generator (23) are connected in two directions through a solution heat exchanger (32), the generator (23) is further connected with a heat recovery device (27) through a heat source water supply pipe (25) and a heat source water return pipe (26) and forms a circulation loop with the heat recovery device (27), and the evaporator (22) is connected with the serpentine cooling coil (10) through a chilled water supply pipe (20) and a chilled water return pipe (21) and forms a circulation loop.

9. Air conditioning assembly according to claim 8, wherein a throttle valve (29) is further provided on a fourth communication pipe (36) of the condenser (28) towards the evaporator (22).

10. Air conditioning assembly according to claim 8, wherein a solution pump (31) is further arranged on the second connection pipe (34) of the absorber (30) to the generator (23).

Technical Field

The invention belongs to the technical field of air conditioning equipment, and relates to an air conditioning unit combining indirect evaporative cooling and lithium bromide absorption refrigeration.

Background

The traditional mechanical refrigeration has better stability and cannot be influenced by meteorological conditions, but for places such as factories and data centers needing air conditioners all year round, the compressor needs to be used all year round, so that the energy consumption of an air conditioning system is huge, and taking the data center as an example, the energy consumption of the air conditioner of the data center accounts for 40% -50% of the overall energy consumption of a data machine room.

The natural cooling technology is one of effective methods for reducing the energy consumption of the data center machine room. At present, natural cooling technologies mainly include air side natural cooling, water side natural cooling and the like. The natural cooling of the air side is divided into a direct type and an indirect type; the direct air side natural cooling is to directly introduce part of outdoor fresh air into a machine room or a workshop for utilization, is simple and easy to implement, has good energy-saving effect, but has higher requirement on the quality of the introduced air, otherwise can influence the quality and the humidity of the air in the machine room or the workshop; the indirect air side natural cooling is to introduce the cold energy of the outdoor air into the room by utilizing the natural circulation of the high-efficiency heat exchanger, thereby not only ensuring the requirement of indoor cooling, but also reducing the running time of the traditional air conditioning system, and being economical and environment-friendly. The natural cooling of the water side comprises the step of providing cold energy for the data center by using natural cold sources such as low-temperature underground water, deep lake water and the like, but the site selection of the data center or a factory is greatly limited, and the data center machine room continuously dissipates heat all the year round, but the evaporative cooling technology is limited by meteorological parameters of ambient air, so that the evaporative cooling technology cannot be applied all the year round.

Disclosure of Invention

The invention aims to provide an air conditioning unit combining indirect evaporative cooling and lithium bromide absorption refrigeration, wherein the indirect evaporative cooling air conditioning unit is combined with a lithium bromide absorption type water chiller, a natural cold source is fully utilized in indirect evaporative cooling, and the lithium bromide absorption type water chiller realizes the recycling of low-grade energy, so that the energy consumption of the air conditioning unit is reduced, and the air conditioning unit is suitable for all the year round.

The technical scheme adopted by the invention is that the indirect evaporative cooling and lithium bromide absorption refrigeration combined air conditioning unit comprises a unit shell, wherein a primary air inlet and a primary air supply outlet are respectively arranged on two corresponding side walls of the unit shell, an air filter a, an indirect evaporative cooling unit, a direct evaporative cooling unit, a serpentine cooling coil and a primary air supply blower are sequentially arranged in the unit shell according to the primary air flow direction, and the serpentine cooling coil is connected with a lithium bromide absorption water chiller and forms a circulation loop with the lithium bromide absorption water chiller.

The present invention is also characterized in that,

the indirect evaporative cooling unit comprises a plate-fin heat exchanger, a high-pressure spray water distributor a and an air filter b are sequentially arranged below the plate-fin heat exchanger from top to bottom, secondary air inlets are further formed in two side walls of the unit shell corresponding to the lower portion of the air filter b, a water collection tank b is arranged at the bottom of the unit shell and is connected with the high-pressure spray water distributor a through a water pipe a, the high-pressure spray water distributor a sprays towards the plate-fin heat exchanger, and a secondary air exhaust outlet is formed in the top of the unit shell corresponding to the upper portion of the plate-fin heat exchanger.

And a secondary air exhaust fan is arranged in the secondary air exhaust outlet.

The water pipe a is also provided with a water pump b.

The primary air blower is a centrifugal fan, and the secondary air exhaust fan is an axial flow fan.

The direct evaporative cooling unit comprises a filler, a high-pressure spray water distributor b is arranged above the filler, a water collecting tank a is arranged below the filler, the water collecting tank a is connected with the high-pressure spray water distributor b through a water pipe b, and the high-pressure spray water distributor b sprays towards the filler.

The water pipe b is also provided with a water pump a.

The lithium bromide absorption type water chiller comprises an evaporator, an absorber, a generator and a condenser which are sequentially connected and form a loop, wherein the absorber and the generator are in bidirectional connection through a solution heat exchanger, the generator is also connected with a heat recovery device through a heat source water supply pipe and a heat source water return pipe and forms a circulation loop with the heat recovery device, and the evaporator is connected with a snake-shaped cooling coil through a chilled water supply pipe and a chilled water return pipe and forms a circulation loop.

The fourth communicating pipe of the condenser flowing to the evaporator is also provided with a throttle valve.

The second communicating pipe of the absorber flow direction generator is also provided with a solution pump.

The invention has the beneficial effects that:

(1) according to the air conditioning unit, the indirect evaporative cooling air conditioning unit and the lithium bromide absorption type water chiller are combined, so that the air conditioning unit can run all the year round, the indirect evaporative cooling makes full use of a natural cold source, and the lithium bromide absorption type water chiller recycles waste heat and waste heat as heat sources, so that the recycling of low-grade energy is realized, the energy consumption of the air conditioning unit is further reduced, and the high efficiency and the energy conservation are realized;

(2) the air conditioning unit realizes the separate and independent configuration of the indirect evaporation natural cooling module and the mechanical refrigeration module, so that the unit volume is reasonably reduced, and the structure is compact;

(3) the air conditioning unit disclosed by the invention utilizes an indirect evaporative cooling principle, ensures the temperature and humidity range of a machine room, simultaneously has no mixing with outside air, ensures the requirements of the machine room on the air quality, reduces the running time of the traditional mechanical refrigeration air conditioner by utilizing a natural cold source cooling mode to the maximum extent, and is economic and environment-friendly.

Drawings

FIG. 1 is a schematic diagram of an air conditioning unit combining indirect evaporative cooling and lithium bromide absorption refrigeration according to the present invention;

fig. 2 is a schematic structural diagram of a lithium bromide absorption type water chiller in an air conditioning unit combining indirect evaporative cooling and lithium bromide absorption type refrigeration.

In the figure, 1, a primary air inlet, 2, an air filter a, 3, a plate-fin heat exchanger, 4, a high-pressure spray water distributor a, 5, a secondary air exhaust fan, 6, a secondary air exhaust outlet, 7, a water pipe a, 8, a water pipe b, 9, a high-pressure spray water distributor b, 10, a serpentine cooling coil, 11, a primary air blower, 12, a primary air supply outlet, 13, a filler, 14, a water collecting tank a, 15, a water pump a, 16, a water collecting tank b, 17, a water pump b, 18, an air filter b, 19, a secondary air inlet, 20, a chilled water supply pipe, 21, a chilled water return pipe, 22, an evaporator, 23, a generator, 24, a lithium bromide absorption water cooler, 25, a heat source supply pipe, 26, a heat source return pipe, 27, a heat recovery device, 28, a condenser, 29, a throttle valve, 30, an absorber, 31, a solution pump, 32, a solution heat exchanger, 33. the first communicating pipe, 34, the second communicating pipe, 35, the third communicating pipe, 36 and the fourth communicating pipe.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention relates to an indirect evaporative cooling and lithium bromide absorption refrigeration combined air conditioning unit, which has a structure shown in figure 1 and comprises a unit shell, wherein a primary air inlet 1 and a primary air supply outlet 12 are respectively arranged on two corresponding side walls of the unit shell, an air filter a2, an indirect evaporative cooling unit, a direct evaporative cooling unit, a serpentine cooling coil 10 and a primary air supply blower 11 are sequentially arranged in the unit shell according to the flow direction of primary air, and the serpentine cooling coil 10 is connected with a lithium bromide absorption water chiller 24 and forms a circulation loop with the lithium bromide absorption water chiller 24.

The indirect evaporative cooling unit comprises a plate-fin heat exchanger 3, a high-pressure spray water distributor a4 and an air filter b18 are sequentially arranged below the plate-fin heat exchanger 3 from top to bottom, secondary air inlets 19 are further formed in two corresponding side walls of a unit shell below the air filter b18, a water collecting tank b16 is arranged at the bottom of the unit shell, the water collecting tank b16 is connected with the high-pressure spray water distributor a4 through a water pipe a7, the high-pressure spray water distributor a4 sprays towards the plate-fin heat exchanger 3, and a secondary air exhaust outlet 6 is formed in the top of the unit shell corresponding to the upper portion of the plate-fin heat exchanger 3.

A secondary air exhaust fan 5 is arranged in the secondary air exhaust outlet 6.

The water pipe a7 is also provided with a water pump b 17.

The primary air blower 11 is a centrifugal fan, and the secondary air exhaust fan 5 is an axial flow fan.

The direct evaporative cooling unit comprises a filler 13, a high-pressure spray water distributor b9 is arranged above the filler 13, a water collecting tank a14 is arranged below the filler 13, the water collecting tank a14 is connected with the high-pressure spray water distributor b9 through a water pipe b8, and the high-pressure spray water distributor b9 sprays towards the filler 13.

The water pipe b8 is also provided with a water pump a 15.

The lithium bromide absorption type water chiller 24 comprises an evaporator 22, an absorber 30, a generator 23 and a condenser 28 which are sequentially connected and form a loop, the absorber 30 and the generator 23 are in bidirectional connection through a solution heat exchanger 32, the generator 23 is also connected with a heat recovery device 27 through a heat source water supply pipe 25 and a heat source water return pipe 26 and forms a circulation loop with the heat recovery device 27, the evaporator 22 is connected with a serpentine cooling coil 10 through a chilled water supply pipe 20 and a chilled water return pipe 21 and forms a circulation loop, wherein the condenser is an air-cooled condenser, a pipeline of the generator 23 flowing to the condenser 28 is a first communicating pipe 33, and a pipeline of the generator 23 flowing to the absorber 30 is a third communicating pipe 35.

A throttle valve 29 is also provided in a fourth communicating pipe 36 leading from the condenser 28 to the evaporator 22.

The second connection pipe 34 of the absorber 30 flowing to the generator 23 is also provided with a solution pump 31.

The working principle of the air conditioning unit is as follows:

indoor return air is purified and filtered by an air filter a2 from a primary air inlet 1, then flows through a dry channel of the plate-fin heat exchanger 3, outdoor air is purified and filtered by an air filter b18 through a secondary air inlet 19, then flows to a wet channel of the plate-fin heat exchanger 3, and exchanges heat with the indoor return air in the dry channel, the indoor return air transfers heat to secondary air on the side of the wet channel, the indoor return air primary air is cooled and cooled, and is cooled and humidified again in a direct evaporative cooling unit, then is cooled and cooled again through a serpentine cooling coil 10 by power provided by a primary air blower 11, finally the cooled and humidified primary air is sent into a room from a primary air supply outlet 12, the primary air is circulated, so that the cooling effect on the room is achieved, and the secondary air is powered by a secondary air exhaust fan 5, and finally, the secondary air carrying heat is discharged from a secondary air exhaust outlet 6.

The working process of the water distribution system is as follows: the indirect evaporative cooling unit is characterized in that water in a water collecting tank b16 is conveyed to a high-pressure spray water distributor a4 through a water pipe a7 to spray and distribute water on the plate-fin heat exchanger 3 by power provided by a water pump b 17; direct evaporative cooling unit: the water in the water collecting tank a14 is conveyed to the high-pressure spray water distributor b9 through the water pipe b8 by the power provided by the water pump a15, and the high-pressure spray water distributor b9 forms a water film after spraying on the spray filler 13, so that the effects of humidifying air and further cooling air are realized.

The working process of the lithium bromide absorption type water chiller 24 is as follows: in the absorber 30, the vaporized refrigerant in the evaporator 22 is continuously absorbed by the liquid absorbent, so as to maintain the low pressure in the evaporator 22; the absorbent absorbs the refrigerant vapor to form a refrigerant-absorbent solution; the refrigerant-absorbent solution is sent into the generator 23 through the second communicating pipe 34 and the solution heat exchanger 32 after being boosted by the solution pump 31, then sent out by the generator 23 and sent back into the absorber 30 along the third communicating pipe 35, and during the period, the refrigerant-absorbent solution returned to the absorber 30 is subjected to heat exchange through the treatment of the solution heat exchanger 32 and the generator 23, so that the temperature of the cold solution entering the generator 23 is effectively increased, and the heat dissipated by the generator 23 is reduced; in the generator 23, the refrigerant-absorbent solution after heat exchange treatment is heated to boiling by mixed hot water in an external heat source water supply pipe 25 connected to a heat recovery device 27, wherein the refrigerant with a lower boiling point is gasified to form a high-pressure gaseous refrigerant, which is separated from the absorbent, then the refrigerant vapor enters a condenser 28 to release heat, then the refrigerant is liquefied by a throttle valve 29 to form a low-pressure liquid refrigerant, the refrigerant is gasified and absorbed in an evaporator 22 to carry out refrigeration, and cold water in a chilled water return pipe 21 is subjected to heat exchange by the evaporator 22 and then is sent to a serpentine cooling coil 10 in the air conditioning unit through a chilled water supply pipe 20 to cool primary air again; the concentrated absorbent returns to the absorber 30 to absorb the low-pressure gaseous refrigerant again, and the hot water heated by the refrigerant-absorbent solution returns to the heat recovery device 27 through the external heat source return pipe 26 to continue heating, thus forming a cycle.

The indirect evaporative cooling air conditioning unit and the lithium bromide absorption type refrigeration combined air conditioning unit combine to enable the air conditioning unit to run all the year round, the indirect evaporative cooling makes full use of natural cold sources, and the lithium bromide absorption type refrigeration machine takes waste heat and waste heat as heat sources to achieve heat recycling and further reduce energy consumption of the air conditioning unit.