CN210399413U - Heat energy recovery system and data center - Google Patents

Heat energy recovery system and data center Download PDF

Info

Publication number
CN210399413U
CN210399413U CN201921206229.5U CN201921206229U CN210399413U CN 210399413 U CN210399413 U CN 210399413U CN 201921206229 U CN201921206229 U CN 201921206229U CN 210399413 U CN210399413 U CN 210399413U
Authority
CN
China
Prior art keywords
air
air chamber
heat
recovery system
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201921206229.5U
Other languages
Chinese (zh)
Inventor
居静
王剑
宋婧
刘治国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hebei Sidage Data Technology Investment Co Ltd
Original Assignee
Hebei Sidage Data Technology Investment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hebei Sidage Data Technology Investment Co Ltd filed Critical Hebei Sidage Data Technology Investment Co Ltd
Priority to CN201921206229.5U priority Critical patent/CN210399413U/en
Application granted granted Critical
Publication of CN210399413U publication Critical patent/CN210399413U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Air Conditioning Control Device (AREA)

Abstract

The utility model discloses a heat energy recovery system and a data center, wherein the heat energy recovery system comprises an outer shell, a heat recovery device and an evaporation and condensation device; the outer shell comprises a first air chamber and a second air chamber, the heat recovery device is arranged in the first air chamber, one end of a first air inlet channel is arranged at an air inlet of the first air chamber, the other end of the first air inlet channel is communicated with the indoor air of the machine room, and a first air outlet channel is arranged at an air outlet of the first air chamber and is communicated with the indoor space of the office area; the evaporative condensing device is arranged in the second air chamber, the second air inlet channel is arranged at the upper end of the second air chamber and is communicated with the outside air, the second air outlet channel is connected with the air supply device, the evaporative condensing device is communicated with the heat recovery device through a pipeline, and a bypass valve is arranged between the first air chamber and the second air chamber. The utility model discloses effectively improve data center heat recovery and utilize, through utilizing the heat to retrieving, can reduce data center annual power consumption, reduce the working costs, realize energy saving and emission reduction.

Description

Heat energy recovery system and data center
Technical Field
The utility model relates to a data center heat recovery utilizes technical field, especially relates to a heat recovery system and data center.
Background
At present, equipment of a data center machine room generates a large amount of heat energy due to the fact that the equipment needs to run all day long, the heat energy cannot be reasonably discharged and utilized, in order to prevent the temperature of the data center machine room from being overhigh, in the prior art, air conditioning refrigeration is mostly adopted to reduce the room temperature, but the power consumption generated by an air conditioning system accounts for about 40% of the total power consumption of the data center, and the power consumption is overhigh;
meanwhile, the temperature is cold in winter, most office areas are heated by heating or air conditioners, the traditional heating modes of coal-fired heating and air conditioners can cause pollution and resource waste to the environment to a certain extent, and the existing problems are that a large amount of heat energy generated by a data center machine room cannot be fully utilized, even more energy sources are required to be paid in order to consume the heat energy, so that the energy consumption is overlarge, and the energy utilization rate is low. Therefore, a heat energy recovery system capable of recycling heat energy of the machine room and cooling the machine room is needed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem of the prior art, the embodiment of the utility model provides a heat recovery system and data center, effectual with heat recovery utilization, the energy saving consumes.
In order to achieve the above object, the present application provides a heat energy recovery system, which includes an outer shell, a heat recovery device and an evaporation and condensation device;
the outer shell comprises a first air chamber and a second air chamber, the heat recovery device is arranged in the first air chamber and comprises a first air inlet channel, a first air outlet channel and a heat exchange assembly, one end of the first air inlet channel is arranged at an air inlet of the first air chamber, the other end of the first air inlet channel is communicated with an interlayer space of a machine room suspended ceiling, and the first air outlet channel is arranged at an air outlet of the first air chamber and is communicated with the interior of an office area;
the evaporative condensing unit is arranged in the second air chamber and comprises a second air inlet channel, a second air outlet channel, an air supply device and a refrigerating assembly, the second air inlet channel is arranged at the upper end of the outer shell and communicated with the outside air, the second air outlet channel is connected with the air supply device, the evaporative condensing unit is communicated with the heat recovery device through pipelines, and a bypass valve is arranged between the first air chamber and the second air chamber.
Further, the heat exchange assembly comprises a condenser, a fan return and a heat exchanger, the condenser and the fan return are arranged at one end of the first air chamber, and the heat exchanger is arranged between the first air chamber and the second air chamber.
Furthermore, the core of the heat exchanger is a film paper laminated body.
Furthermore, the refrigeration assembly comprises an evaporator, a compressor and an electric cabinet, and the compressor, the evaporator, the electric cabinet and the bypass valve are communicated with each other through a capillary tube internally provided with a refrigerant.
Further, the air supply device comprises an air feeder, an air feeder fan and a fan rear shell, the air feeder is connected with the second air outlet channel, the air feeder fan is connected with the air feeder, and the fan rear shell is arranged at the rear end of the air feeder fan.
Further, still include the third air chamber in the shell, still be equipped with exhaust device in the third air chamber, exhaust device includes exhaust fan, return air passageway and return air pipe, the one end and the indoor air intercommunication of computer lab of return air passageway, the other end of return air passageway with the exhaust fan intercommunication.
Furthermore, the exhaust fan and the blower are both provided with a wind speed mode, and the maximum wind volume of the exhaust fan is equal to the minimum wind volume of the blower.
Furthermore, the heat energy recovery system also comprises an air purification device, the first air outlet channel, the second air outlet channel and the air return channel are all provided with the air purification device, and air purified by the air purification device is respectively led out from the first air outlet channel and the second air outlet channel.
Further, the thermal energy recovery system further comprises an input module, a control module, and a plurality of sensors; the input module, the heat recovery device, the evaporation and condensation device and the plurality of sensors are all in communication connection with the control module, and the plurality of sensors are respectively arranged in the shell and in the indoor space outside the shell.
The utility model also provides a data center, including foretell heat recovery system.
The utility model provides a heat recovery system and data center can effectively improve data center heat recovery and utilize, through utilizing the heat of retrieving, can reduce data center annual power consumption, reduce the working costs, realize energy saving and emission reduction, and the practicality is strong. In addition, the heat energy recovery system of the data center has two operation modes in winter and summer, the operation modes can be converted only by adjusting the opening and closing states of the air return inlet, and the heat energy recovery system is simple in structure setting, convenient to control and high in use applicability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a heat energy recovery system according to an embodiment of the present invention.
Description of reference numerals:
1-outer shell, 11-first air chamber, 12-second air chamber, 13-third air chamber, 14-bypass valve, 2-heat recovery device, 21-heat exchange component, 211-condenser, 212-air return machine, 213-heat exchanger, 3-evaporative condensing device, 31-air supply device, 311-air supply machine, 312-air supply machine fan, 313-fan rear shell, 32-refrigeration component, 321-evaporator, 322-compressor, 323-electric cabinet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only some embodiments, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the present invention, the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and do not limit the devices, elements or components indicated to have a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may have other meanings besides orientation or position, for example, the term "on" may also have some dependency or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "disposed," "secured," "mounted," "connected," and the like are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
"plurality" means two or more unless otherwise specified.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.
As shown in fig. 1, the heat energy recovery system provided in this embodiment can be applied to a data center room or a place where more heat energy is generated by equipment and needs to be recovered. The heat energy recovery system comprises an outer shell 1, a heat recovery device 2 and an evaporation and condensation device 3; the shell body 1 comprises a first air chamber 11 and a second air chamber 12, the heat recovery device 2 is arranged in the first air chamber 11, the heat recovery device 2 comprises a first air inlet channel, a first air outlet channel and a heat exchange assembly 21, one end of the first air inlet channel is arranged at an air inlet of the first air chamber 11, the other end of the first air inlet channel is communicated with an interlayer space of the machine room suspended ceiling, and the first air outlet channel is arranged at an air outlet of the first air chamber 11 and is communicated with the interior of an office area; the evaporative condensing unit 3 is arranged in the second air chamber 12, the evaporative condensing unit 3 comprises a second air inlet channel, a second air outlet channel, an air supply device 31 and a refrigerating assembly 32, the second air inlet channel is arranged at the upper end of the outer shell 1 and communicated with the outside air, the second air outlet channel is connected with the air supply device 31, the evaporative condensing unit 3 is communicated with the heat recovery device 2 through a pipeline, and a bypass valve is arranged between the first air chamber 11 and the second air chamber 12.
The outer casing 1 of the present embodiment is a rectangular body, and the heat recovery device 2 and the evaporative condensing device 3 form two circulation systems in the outer casing 1. A circulation system is the heat energy that is produced by the computer lab equipment, and the high gas upward movement of temperature is to the computer lab furred ceiling in the intermediate layer, and the heat that the heat intermediate layer produced on the computer lab furred ceiling is absorbed to first air chamber, and in the hot-air in the furred ceiling intermediate layer got into first air chamber 11 through first inlet air channel, the partial warm air in first air chamber 11 was through first air-out passageway to indoor official working region through the exhaust pipe, heats. The first air inlet channel and the first air outlet channel are arranged on one side of the first air chamber, the first air inlet channel is communicated with the air return fan 212, and a bypass valve 14 is arranged between the first air chamber 11 and the second air chamber 12. The other circulation system is that another part of the hot air in the first air chamber 11 recovers heat energy through the heat exchanger 213 and enters the second air chamber 12 through the bypass valve 14. The heat exchanger 213 can greatly reduce the heat loss during cooling and heating, and is more energy-saving compared with a common ventilating fan. Meanwhile, a second air inlet channel arranged at the upper end of the second air chamber 12 is communicated with the outside air, the outside air enters the second air chamber and is mixed with the gas exchanged by the heat exchanger 213, the temperature of the gas in the second air chamber 12 is adjusted by matching the evaporative condensing device 3, and the gas with low temperature moves downwards and is refrigerated to the machine room through a second air outlet channel by the air supply device 31 to complete a loop. As shown in fig. 1, wherein the direction of arrow indicates the gas flow direction, the utility model provides a temperature in the computer lab can be adjusted to heat recovery system, reduces air conditioning refrigeration, reduces data center annual power consumption, reduces the working costs, realizes energy saving and emission reduction.
In this embodiment, in hot seasons, the evaporation and condensation system is started, and the refrigerant flows in the direction from the compressor 322 to the condenser 211 to the evaporator 321 and back to the compressor 322; a bypass valve 14 in the outer shell 1 is opened, part of indoor return air of the data center machine room is driven by an indoor exhaust fan, exhausted to an outdoor exhaust room through an indoor exhaust room and a heat exchanger core, and then exhausted out of the room from an outdoor exhaust outlet; the other part of the air passes through an indoor bypass valve 14, then the air treated by the heat exchanger 213 in the second air chamber 12 after heat exchange is mixed with outdoor fresh air in the second air inlet channel, and then the mixed air enters the evaporative condensing device 3.
In cold seasons, the evaporative condensing system is started, and the flow direction of the heating medium is from the condenser 211 to the heat exchanger 213 and back to the compressor 322 for refrigeration; a bypass valve 14 in the outer shell 1 is opened, and heat generated by equipment in a data center room enters the heat recovery device 2 through a heat recovery first air inlet channel; the hot air passes through the heat exchanger 213, then passes through the bypass valve 14, is mixed with outdoor fresh air of the second air inlet channel, is cooled by the compressor 322, enters the air outlet of the indoor blower 311 by the evaporator 321, and is used for cooling the indoor of the data center machine room.
In one embodiment, the heat exchange assembly includes a condenser 211, a fan 212 and a heat exchanger 213, the condenser 211 and the fan 212 are disposed at one end of the first air chamber 11, the heat exchanger 213 is disposed between the first air chamber 11 and the second air chamber 12, the hot return air ceiling of the data center is used as a heat source for recycling, and waste heat of the data center is introduced into an office area through the heat exchanger 213 for heating in winter, so as to recycle heat energy and save energy.
In a preferred embodiment, the core of the heat exchanger 213 is a laminated film paper, and the air in the first air chamber 11 is ventilated. During ventilation, the indoor energy temperature and humidity are recovered through the special film paper, so that the exchange efficiency is good, and the effect of saving energy is achieved.
In a specific embodiment, the refrigeration assembly comprises an evaporator 321, a compressor 322, an electric cabinet 323, and an independent and closed evaporation and condensation system composed of the compressor 322, the evaporator 321, and the electric cabinet 323, the compressor 322, the evaporator 321, the electric cabinet 323, and the bypass valve 14 are communicated with each other through a capillary tube filled with a refrigerant, and through adjustment of the bypass valve 14, the refrigerant flows in the direction from the compressor 322 to the evaporator 321 and back to the compressor 322, and the recovered heat is utilized to refrigerate, so that the temperature of the data center machine room is reduced, the annual power consumption of the data center can be reduced, the operating cost is reduced, and energy conservation and emission reduction are realized.
In one embodiment, the air supply device 31 includes a blower 311, a blower fan 312 and a rear fan housing 313, the blower 311 is connected to the second air outlet channel, the blower fan 312 is connected to the blower 311, the rear fan housing 313 is arranged at the rear end of the blower fan 312, a compressor and an evaporator air inlet channel are formed between the rear fan housing 313 and the front wall of the outer housing 1, and the compressor and the evaporator are arranged at the inner side of the air conditioner condensed air inlet; when the blower fan 312 is started, the blower fan 312 drives the heat-recovered air to enter the compressor 322 and the evaporator 321 through the air inlet channels of the compressor 322 and the evaporator 321, and after absorbing heat (or releasing heat) around the evaporator 321, the heat is discharged to the room of the machine room through the blower fan 312 and the second air outlet channel of the air outlet.
In a specific embodiment, still include third air chamber 13 in the shell body 1, still be equipped with exhaust device in the third air chamber 13, exhaust device includes exhaust fan, return air passageway and return air pipe, and the one end of return air passageway and the indoor air intercommunication of computer lab, the other end and the exhaust fan intercommunication of return air passageway, the exhaust fan is connected with the return air pipe through indoor return air passageway, discharges indoor dirty air that loses.
In a preferred mode, the exhaust fan and the blower 311 are both provided with a wind speed mode, the wind speed has three grades of high, medium and low, the maximum wind quantity of the exhaust fan is equal to the minimum wind quantity of the blower, the wind speed can be freely adjusted according to the actual temperature condition, and the flexibility is strong.
In a preferred mode, heat recovery system still includes air purification device, first air-out passageway, second air-out passageway and return air passageway all are equipped with air purification device, the air after air purification device purifies derives from first air-out passageway and second air-out passageway respectively, air purification device includes air filter, air filter communicates first air-out passageway, the air outlet of second air-out passageway and return air passageway, the air after air filter filters flows out from the air outlet promptly, air filter is used for filtering purifying thing and other impurity in the air that treats the outflow.
In a preferred form, the thermal energy recovery system further comprises an input module, a control module and a plurality of sensors; input module, evaporation condensing equipment, heat reclamation device and a plurality of sensor all with control module between establish the communication and be connected, a plurality of sensors set up inside the shell body and the shell body outside in the furred ceiling intermediate layer and the room of computer lab respectively.
In this embodiment, an instruction is input to the control module through the input module, and the control module can control the air supply device, the air exhaust device, the refrigeration assembly and the heat exchange assembly according to the instruction to complete the indoor temperature adjustment of the machine room; optionally, the heat recovery system may further include a display, a communication connection is established between the display and the control module, and the control module may display information uploaded by the sensor on the display.
In this embodiment, the control module may establish communication connection with a plurality of local heat recovery systems, so that the plurality of local heat recovery systems are monitored and controlled by one control module.
The utility model also provides a data center, include if the embodiment of the utility model provides a heat recovery system. The utility model provides a heat recovery system sets up the intermediate layer space in computer lab furred ceiling upper end, is equipped with winter among the data center heat recovery system and has two kinds of operational modes with summer, only can change the operational mode through the switching state of adjustment return air inlet, and the structure sets up simply, control is convenient, the use suitability is strong.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (10)

1. A heat energy recovery system is characterized by comprising an outer shell, a heat recovery device and an evaporation and condensation device;
the outer shell comprises a first air chamber and a second air chamber, the heat recovery device is arranged in the first air chamber and comprises a first air inlet channel, a first air outlet channel and a heat exchange assembly, one end of the first air inlet channel is arranged at an air inlet of the first air chamber, the other end of the first air inlet channel is communicated with an interlayer space of a machine room suspended ceiling, and the first air outlet channel is arranged at an air outlet of the first air chamber and is communicated with the interior of an office area;
the evaporative condensing unit is arranged in the second air chamber and comprises a second air inlet channel, a second air outlet channel, an air supply device and a refrigerating assembly, the second air inlet channel is arranged at the upper end of the outer shell and communicated with the outside air, the second air outlet channel is connected with the air supply device, the evaporative condensing unit is communicated with the heat recovery device through pipelines, and a bypass valve is arranged between the first air chamber and the second air chamber.
2. The heat energy recovery system of claim 1, wherein the heat exchange assembly comprises a condenser, a blower fan, and a heat exchanger, the condenser and the blower fan being disposed at one end of the first air chamber, the heat exchanger being disposed between the first air chamber and the second air chamber.
3. The heat energy recovery system of claim 2 wherein the core of the heat exchanger is a stack of film paper.
4. The heat energy recovery system of claim 1, wherein the refrigeration assembly comprises an evaporator, a compressor, and an electric cabinet, and the compressor, the evaporator, the electric cabinet, and the bypass valve are interconnected via a capillary tube containing a refrigerant.
5. The heat energy recovery system of claim 1, wherein the air blowing device includes an air blower, an air blower fan and a rear fan housing, the air blower is connected to the second air outlet passage, the air blower fan is connected to the air blower, and the rear fan housing is disposed at a rear end of the air blower fan.
6. The heat energy recovery system of claim 5, further comprising a third air chamber in the outer shell, wherein an air exhaust device is further disposed in the third air chamber, the air exhaust device comprises an exhaust fan, a return air channel and a return air pipe, one end of the return air channel is communicated with air in the machine room, and the other end of the return air channel is communicated with the exhaust fan.
7. The heat energy recovery system of claim 6, wherein the exhaust fan and the blower are both set to a wind speed mode, and the maximum wind volume of the exhaust fan is equal to the minimum wind volume of the blower.
8. The heat energy recovery system of claim 1, further comprising an air purification device, wherein the air purification device is disposed in each of the first outlet channel, the second outlet channel and the return air channel, and the air purified by the air purification device is respectively led out from the first outlet channel and the second outlet channel.
9. The thermal energy recovery system of claim 1 further comprising an input module, a control module, and a plurality of sensors;
the input module, the heat recovery device, the evaporation and condensation device and the plurality of sensors are all in communication connection with the control module, and the plurality of sensors are respectively arranged in the shell and in the indoor space outside the shell.
10. A data centre including a thermal energy recovery system according to any one of claims 1 to 9.
CN201921206229.5U 2019-07-29 2019-07-29 Heat energy recovery system and data center Active CN210399413U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921206229.5U CN210399413U (en) 2019-07-29 2019-07-29 Heat energy recovery system and data center

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921206229.5U CN210399413U (en) 2019-07-29 2019-07-29 Heat energy recovery system and data center

Publications (1)

Publication Number Publication Date
CN210399413U true CN210399413U (en) 2020-04-24

Family

ID=70356997

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921206229.5U Active CN210399413U (en) 2019-07-29 2019-07-29 Heat energy recovery system and data center

Country Status (1)

Country Link
CN (1) CN210399413U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110360735A (en) * 2019-07-29 2019-10-22 河北思达歌数据科技投资有限公司 Heat reclaiming system and data center
CN113573543A (en) * 2021-06-10 2021-10-29 华为技术有限公司 Distributed composite refrigeration system and data center
GB2600234A (en) * 2020-09-07 2022-04-27 Venn Cc //Tech Ltd Heating system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110360735A (en) * 2019-07-29 2019-10-22 河北思达歌数据科技投资有限公司 Heat reclaiming system and data center
GB2600234A (en) * 2020-09-07 2022-04-27 Venn Cc //Tech Ltd Heating system
GB2600234B (en) * 2020-09-07 2023-02-15 Venn Cc //Tech Ltd Heating system
CN113573543A (en) * 2021-06-10 2021-10-29 华为技术有限公司 Distributed composite refrigeration system and data center
CN113573543B (en) * 2021-06-10 2023-09-29 华为数字能源技术有限公司 Distributed composite refrigeration system and data center

Similar Documents

Publication Publication Date Title
CN103912947B (en) For fan coil and the heat pump of heat recovery fresh air conditioning group
CN210399413U (en) Heat energy recovery system and data center
CN203177357U (en) Domestic fresh air dehumidifier
CN203132011U (en) Liquid desiccant regeneration heat-and-humidity independent treatment air-conditioner device
CN103615788B (en) A kind of control method of air conditioner
CN202204076U (en) Heat recovery air conditioning cabinet applicable to animal room
CN203642369U (en) Multifunctional air conditioning dehumidification unit with condensation heat recycling function
CN101216225A (en) Double temperature cold water/cold air unit
CN207123040U (en) A kind of Animal House two fans formula air conditioner intelligent control system
CN102425831A (en) Motorless split-type heat-pipe air conditioner combined unit and refrigerating method
CN201621796U (en) Double-cold-source energy-saving air conditioner
CN210959210U (en) Air conditioner cabinet system integrating heat exchange function
RU189260U1 (en) Forced-air and exhaust ventilation with heat recovery
CN101799191B (en) Water source heat pump cabinet air conditioner for ship
CN215176803U (en) Heat recovery heat pump dehumidification system
CN109899944B (en) Regional dynamic circulation refrigeration and heating system
CN110360735A (en) Heat reclaiming system and data center
CN207515060U (en) A kind of distribution Fresh air handing unit
CN201277663Y (en) Air conditioner system with humidity and temperature independently controlled
CN109990413A (en) A kind of air-conditioner set of gravity assisted heat pipe in conjunction with dew point indirect evaporative cooler
CN109405086A (en) Wall-mounted total-heat recovery type fresh air dehumidifier group
CN210425382U (en) Outdoor unit with waste heat recovery and natural cold source utilization functions
CN101105328A (en) Explosion-proof air-conditioner fresh air inlet cold energy reclamation device
CN205332583U (en) Duplex condition air conditioner
CN110260422A (en) Four air port fresh air heat pump dehumidifier devices

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant