CN216437844U

CN216437844U - Power heat pipe micro-channel evaporation and condensation combined air conditioning unit for data center

Info

Publication number: CN216437844U
Application number: CN202122885048.3U
Authority: CN
Inventors: 黄翔; 马钢; 杜妍; 王红利; 王颖
Original assignee: Xian Polytechnic University
Current assignee: Xian Polytechnic University
Priority date: 2021-11-23
Filing date: 2021-11-23
Publication date: 2022-05-03
Anticipated expiration: 2031-11-23

Abstract

The utility model discloses a power heat pipe microchannel evaporation cooling combined air conditioning unit for data center, which comprises a housin, the inside heat preservation baffle that is provided with of casing, heat preservation baffle is primary air passageway and overgrate air passageway with casing internal partitioning, on the casing lateral wall of primary air passageway, be provided with primary air intake and primary air outlet down respectively, be provided with the microchannel evaporator in the primary air passageway, be provided with the overgrate air outlet on the casing roof of overgrate air passageway, be provided with the overgrate air intake on being close to the casing wall of lower part, be provided with condensing coil and spraying system in the overgrate air passageway, condensing coil and compressor, the fluorine pump, vapour and liquid separator, the microchannel evaporator, the liquid trap, thermal expansion valve connects gradually and constitutes closed loop. The utility model discloses the outdoor natural cold source of air conditioning unit make full use of has reduced the data center cooling system energy consumption, makes the inside humiture of data center maintain in standard range, guarantee data center normal operating.

Description

Power heat pipe micro-channel evaporation and condensation combined air conditioning unit for data center

Technical Field

The utility model belongs to the technical field of air conditioning equipment, concretely relates to power heat pipe microchannel evaporation condensation combined air conditioning unit for data center.

Background

Since China enters fourteen-five planning, industries such as artificial intelligence, big data, cloud computing and the Internet of things are continuously concerned highly by various industries, the innovative application of key digital technology is enhanced, the promotion of digital industry and the promotion of industrial digital transformation are accelerated, the traditional industry barrier is broken through, the new advantage of digital economy is created as a hot topic of the development of the current new infrastructure industry, and the data center naturally becomes a serious factor in the development of the new infrastructure industry.

The data center is a global cooperative specific equipment network and is used for transmitting, accelerating, displaying, calculating and storing data information on internet network infrastructure, the quantity and quality requirements of data transmission are continuously improved along with the high-speed development of the internet industry, meanwhile, the energy consumption of the data center is a huge challenge, the traditional data center heat dissipation system is low in efficiency and high in energy consumption, according to the statistics of the energy bureau of China, the electricity consumption of the data center in 2018 is about the electricity generation of a three gorges dam for a whole year, and about 35% -40% of electricity is used for the chip heat dissipation of the data center, so that the heat dissipation efficiency of the data center is improved, and the optimization of a data center refrigeration air-conditioning system is of great importance to the energy saving problem of the data center.

The heat pipe technology fully utilizes the heat conduction principle and the rapid heat transfer property of the phase change medium, the heat of a heating object is rapidly transferred to the outside of a heat source through the heat pipe, and the heat conduction capability of the heat pipe exceeds the heat conduction capability of any known metal. The fluorine pump is a fluid machine which utilizes the pump to drive fluorine liquid (gas) and overcomes the resistance circulation of a pipe network, and compared with the traditional compressor, the fluorine pump has the advantages that the power is greatly reduced, and the fluorine pump can provide a proper pressure head for a refrigerating system. The flat tube of the micro-channel heat exchanger is internally provided with dozens of fine flow channels, the collecting tube is internally provided with a clapboard which divides the flow channels of the heat exchanger into a plurality of flows, the air side is provided with heat exchange fins with compact structure, and the air side has larger heat exchange area. The evaporation and condensation technology takes air and water as cooling media, the water and the air are mutually contacted and evaporated to take away the heat of a condenser, the efficiency is higher, and the system structure is compact. The technology can prolong the service time of the natural cold source in the data center and optimize the PUE of the data center.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a power heat pipe microchannel evaporation condensation combination formula air conditioning unit for data center has solved the high problem of current traditional data center cooling system energy consumption.

The utility model adopts the technical proposal that: the combined air conditioning unit comprises a shell, wherein a heat insulation partition plate is arranged inside the shell and divides the interior of the shell into a primary air channel and a secondary air channel, a primary air inlet and a primary air outlet are respectively arranged on the upper portion and the lower portion of the side wall of the shell of the primary air channel, a micro-channel evaporator is arranged in the primary air channel, a secondary air outlet is arranged on the top wall of the shell of the secondary air channel, a secondary air inlet is arranged on the wall of the shell close to the lower portion, a condensing coil and a spraying system are arranged in the secondary air channel, and the condensing coil is sequentially connected with a compressor, a fluorine pump, a gas-liquid separator, the micro-channel evaporator, a liquid collector and a thermal expansion valve to form a closed loop.

The utility model is characterized in that a primary air fan is arranged at the position of the primary air outlet in the primary air channel and adjacent to the primary air outlet.

And a filter a is arranged at the position of the adjacent primary air inlet in the primary air channel.

And a filter b is arranged in the secondary air channel and at the position adjacent to the secondary air inlet.

Air inlets at two sides of secondary air are arranged on the other shell wall of the secondary air channel close to the lower part.

The fluorine pump is connected with a one-way valve b.

The compressor is connected with a one-way valve a.

The spraying system comprises a water storage tank positioned at the lower part of the condensing coil, filler positioned at the upper part of the condensing coil, a high-pressure nozzle, a water baffle and a secondary fan, wherein the high-pressure nozzle is connected with the water storage tank through a water supply pipe, and a water supply pump is arranged on the water supply pipe.

The utility model has the advantages that,

(1) the heat pipe is a high-efficiency refrigeration heat dissipation system in the data center, the traditional heat pipe system is divided into an indoor heat exchanger and an outdoor heat exchanger, the cold end and the hot end of the heat pipe are integrated into an integrated AHU by the unit, the integration is high, and the system design is more compact.

(2) Compare the design theory with mainstream data center AHU on the current market and break through to some extent, present AHU core heat transfer equipment is plate-fin indirect evaporative cooling heat exchange core mostly, and power heat pipe microchannel evaporative condensation combined air conditioning unit adopts microchannel heat exchanger and evaporative condensation coil pipe to realize the heat exchange of indoor side and outdoor side air, and the air carries out direct heat exchange with the refrigerant, compares in traditional plate-fin indirect evaporative cooling heat exchange core, has realized breaking through on its heat transfer mode.

(3) Compared with a plate-fin indirect evaporative cooling heat exchange core, the power heat pipe system avoids the problems of scale formation, penetration and freezing prevention in winter of the heat exchange core, and is more favorable for later maintenance of the unit under the long-term operation of the data center.

(4) Compared with the prior fluorine pump heat pipe system product on the market, the power heat pipe microchannel evaporation and condensation combined air conditioning unit selects the microchannel heat exchanger, and has higher heat exchange efficiency compared with the traditional fin coil heat exchanger.

(5) The unit condensation is surveyed and is adopted the mode of evaporation condensation to take away the heat of condenser, and the air is at condensing coil surface and water film contact, and the water film carries out the heat and mass exchange with the air under the combined action of temperature difference and water vapor partial pressure difference, takes place direct evaporative cooling process, compares forced air cooling and water-cooling, and the heat dissipation is more high-efficient.

(6) The mode of trilateral air inlet is taken to unit air inlet department, and on the unit left side, the front and back side respectively sets up the air intake, guarantees that the intake is sufficient, fully takes away the heat of condenser for the unit more has higher energy efficiency ratio.

(7) The unit comprises two parts about by, the left side comprises spraying system, condensing coil, secondary fan etc. and right side heat pipe microchannel evaporator, primary fan constitute adopt the highly integrated design theory of modularization, reduce the volume of unit when guaranteeing the refrigerating output to realize prefabrication, the commercialization of evaporation cooling air conditioning technology.

Description of the drawings:

fig. 1 is a schematic structural diagram of the air conditioning unit of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a left side view of FIG. 1;

fig. 4 is a front view of fig. 1.

In the figure, 1, a secondary air inlet, 2, a compressor, 3, a one-way valve a, 4, a fluorine pump, 5, a one-way valve b, 6, a filler, 7, a high-pressure nozzle, 8, a secondary air outlet, 9, a secondary fan, 10, a water supply pipe, 11, a water baffle, 12, a heat insulation partition board, 13, a gas-liquid separator, 14, a filter a, 15, a primary air inlet, 16, a primary air outlet, 17, a primary fan, 18, a microchannel evaporator, 19, a liquid collector, 20, a thermal expansion valve, 21, a water storage tank, 22, a condensing coil, 23, a water supply pump, 24, a filter b and 25, and secondary air two-side air inlets.

Detailed Description

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

The structure of the power heat pipe microchannel evaporation cooling combined air conditioning unit for the data center of the utility model is shown in figure 1, which comprises a shell, wherein a heat preservation clapboard 12 is arranged in the shell, the heat preservation clapboard 12 divides the shell into a primary air channel and a secondary air channel, a primary air inlet 15 and a primary air outlet 16 are respectively arranged on and under the shell side wall of the primary air channel, a primary fan 17 is arranged in the primary air channel and adjacent to the primary air outlet 16, a filter a14 is arranged in the primary air channel and adjacent to the primary air inlet 15, a microchannel evaporator 18 is arranged in the primary air channel, a secondary air outlet 8 is arranged on the shell top wall of the secondary air channel, a secondary air inlet 1 is arranged on the shell wall close to the lower part, a filter b24 is arranged in the secondary air channel and adjacent to the secondary air inlet 1, secondary air inlets 25 are arranged on the other shell wall of the secondary air channel and close to the lower part, and a condensing coil 22 and a spraying system are arranged in the secondary air channel, and the condensing coil 22 is sequentially connected with the compressor 2, the fluorine pump 4, the gas-liquid separator 13, the microchannel evaporator 18, the liquid collector 19 and the thermal expansion valve 20 to form a closed loop. The fluorine pump 4 is connected with check valve b5, and the compressor 2 is connected with check valve a3, and the sprinkler system includes the water storage box 21 that is located condensing coil 22 lower part, is located condensing coil 22 upper portion filler 6, high pressure nozzle 7, breakwater 11 and overfire fan 9, and high pressure nozzle 7 passes through delivery pipe 10 and links to each other with water storage box 21, is provided with feed pump 23 on the delivery pipe 10.

The utility model discloses air conditioning unit's working process does:

the primary air working process: the primary air is return air of an indoor machine room of the data center, enters from a primary air inlet 15 under the action of a primary air blower 17, enters the unit after being filtered by a filter a14, flows through a micro-channel evaporator 18 in the unit, fully exchanges heat with the micro-channel evaporator 18, and then is sent to the data center through a primary air outlet 16 under the action of the primary air blower 17.

The working process of secondary air: the secondary air is outdoor fresh air, enters from a secondary air inlet 1 under the action of a secondary fan 9, is treated by a filter b24 and then reaches a condensation section, and at the moment, water in the water tank is sprayed out from a water supply pipe 10 through a high-pressure nozzle 7 under the suction action of a water supply pump 23 and is sprayed on the surface of a condensation coil 22 to form a uniform water film; because of the function of the secondary fan 9, the fresh air outside is forced to pass through the surface of the coil and then is discharged. The air is in coil pipe surface and water film contact, the water film carries out heat and mass exchange with the air under the combined action of temperature difference and vapor partial pressure difference, take place direct evaporative cooling process, water film surface temperature is reduced, then the heat conduction effect through condensing coil, the medium in the cooling tube, make the condensation of the refrigerant steam of high temperature high pressure become microthermal refrigerant liquid, later the air that the temperature is relatively higher fully contacts with water at the filler section, make the water cooling, cold water drenches the condenser coil pipe 22 surface once more, the hot-air is discharged under secondary air fan 9's effect outdoors.

The working process of the filler section water spraying system is as follows:

the water in the water storage tank 21 at the bottom of the unit is sprayed to the surface of the filler 6 through the high-pressure nozzle 7 under the action of the water supply pump 23, and the water cooled by the filler falls back into the water tank after the heat and mass exchange between the condensing coil 22 and the secondary air, and the water is circulated in a reciprocating manner.

The operation mode is as follows:

dynamic heat pipe mode:

when the outdoor temperature is low, the compressor 2 and the spraying system are in a closed state, the one-way valve a3 is opened, and the one-way valve b5 is closed, so that the outdoor temperature change condition needs to be closely monitored, and when the outdoor temperature is lower than the freezing point, the water in the water tank needs to be drained to prevent freezing. The primary air fan 17, the secondary air fan 9 and the fluorine pump 4 are operated, fresh air with low outdoor temperature is filtered by the filter b24 under the action of the secondary air fan 9, then is cooled by the refrigerant steam through the condensing coil 22, the primary air passes through the micro-channel evaporator 18, the refrigerant working medium in the tube absorbs the heat of the primary air of the data center to be vaporized, and then the return air primary air of the data center is cooled, and the primary air is sent into the data center after being cooled for the first time through the micro-channel evaporator 18.

Power heat pipe + evaporation condensation mode:

in the transition season, the compressor is still in the closed state, the one-way valve a3 is opened, and the one-way valve b5 is closed. When the spraying system is started, namely the water supply pump 23 is started, outdoor air enters from the secondary air inlet 1, is filtered by the filter b24 and then grazes the surface of the condensing coil 22, generates heat and humidity exchange with spray water, takes away heat of the condensing coil 22 by using latent heat of vaporization of the water, and is discharged to the outside through the secondary air outlet 8 under the action of the secondary fan 9. The primary air is cooled to the air outlet temperature by the micro-channel evaporator 18 and sent to the data center under the action of the primary air fan 17.

Fluorine pump pressure boost + frequency conversion compression + evaporation condensation mode:

in high-temperature and high-humidity seasons, the compressor enters a working state, a fluorine pump is in a pressurization mode, a variable-frequency compression mode and an evaporation and condensation mode, the one-way valve a3 is closed and opened, and the one-way valve b5 is closed. Outdoor air enters from the secondary air inlet 1, is filtered by the filter b24 and sweeps across the surface of the condensing coil, generates heat and moisture exchange with spray water, takes away heat of the condensing coil 22 by using latent heat of vaporization of water, and is discharged to the outdoor through the secondary air outlet 8 under the action of the secondary fan 9. The primary air is cooled by the microchannel evaporator 18 and then sent to the data center.

Full-frequency compression + evaporative condensation mode:

in high-temperature and high-humidity seasons, when the outdoor temperature and humidity are high to a certain degree, the compressor enters a rated frequency working state, a full-frequency compression and evaporation condensation mode is operated, the one-way valve a3 is closed, and the one-way valve b5 is opened. Outdoor air enters from the secondary air inlet 1, is filtered by the filter b24 and sweeps across the surface of the condensing coil 22, generates heat and moisture exchange with spray water, takes away heat of the condensing coil 22 by using latent heat of vaporization of water, and is discharged to the outdoor through the secondary air outlet 8 under the action of the secondary fan 9. The primary air is cooled by the microchannel evaporator 18 and then sent to the data center.

The utility model relates to a power heat pipe microchannel evaporation cooling combination formula air conditioning unit for data center utilizes power heat pipe technique, mechanical refrigeration technique and evaporation and condensation technique to combine together, and microchannel heat exchanger compact structure is bigger on the clear area ratio for the used copper pipe of finned tube heat exchanger, has higher heat exchange efficiency. Several energy-saving technologies are organically combined, an outdoor natural cold source is fully utilized, the temperature and the humidity inside the data center are maintained within a standard range, and the normal working and operation of the data center are guaranteed.

Claims

1. Power heat pipe microchannel evaporation cooling combined type air conditioning unit for data center, which is characterized by comprising a shell, wherein a heat insulation partition plate (12) is arranged inside the shell, the heat insulation partition plate (12) divides the inner part of the shell into a primary air channel and a secondary air channel, a primary air inlet (15) and a primary air outlet (16) are respectively arranged on the upper portion and the lower portion of the side wall of the shell of the primary air channel, a microchannel evaporator (18) is arranged in the primary air channel, a secondary air outlet (8) is arranged on the top wall of the shell of the secondary air channel, a secondary air inlet (1) is arranged on the wall of the shell close to the lower portion, a condensing coil (22) and a spraying system are arranged in the secondary air channel, and the condensing coil (22) and a compressor (2), a fluorine pump (4), a gas-liquid separator (13), a microchannel evaporator (18), The liquid collector (19) and the thermostatic expansion valve (20) are connected in sequence to form a closed loop.

2. Air conditioning unit according to claim 1, characterized in that a primary air fan (17) is arranged in the primary air channel adjacent to the primary air outlet (16).

3. Air conditioning assembly according to claim 1, wherein a filter a (14) is arranged in the primary air channel adjacent to the primary air inlet (15).

4. Air conditioning assembly according to claim 1, wherein a filter b (24) is arranged in the secondary air channel adjacent to the secondary air inlet (1).

5. Air conditioning assembly according to claim 1, wherein the secondary air channel is provided with secondary air side air inlets (25) in the wall of the other housing near the lower part.

6. Air conditioning assembly according to claim 1, characterized in that a non-return valve b (5) is connected to the fluorine pump (4).

7. Air conditioning assembly according to claim 1, characterized in that a non-return valve a (3) is connected to the compressor (2).

8. Air conditioning unit according to any of claims 1 to 7, wherein the spraying system comprises a water storage tank (21) located at the lower part of the condensing coil (22), a filler (6) located at the upper part of the condensing coil (22), a high pressure nozzle (7), a water baffle (11) and a secondary air blower (9), the high pressure nozzle (7) is connected with the water storage tank (21) through a water supply pipe (10), and a water supply pump (23) is arranged on the water supply pipe (10).