CN113137672A - Air conditioning system - Google Patents
Air conditioning system Download PDFInfo
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- CN113137672A CN113137672A CN202110396861.6A CN202110396861A CN113137672A CN 113137672 A CN113137672 A CN 113137672A CN 202110396861 A CN202110396861 A CN 202110396861A CN 113137672 A CN113137672 A CN 113137672A
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- heat exchanger
- fresh air
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- channel
- conditioning system
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 45
- 238000011084 recovery Methods 0.000 claims abstract description 14
- 238000009833 condensation Methods 0.000 claims description 42
- 230000005494 condensation Effects 0.000 claims description 42
- 238000003303 reheating Methods 0.000 claims description 28
- 238000007791 dehumidification Methods 0.000 claims description 21
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 239000002826 coolant Substances 0.000 claims description 9
- 238000000746 purification Methods 0.000 claims description 9
- 230000002070 germicidal effect Effects 0.000 claims description 6
- 230000000844 anti-bacterial effect Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 abstract description 48
- 238000005265 energy consumption Methods 0.000 abstract description 12
- 230000009471 action Effects 0.000 abstract description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 36
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 12
- 238000001914 filtration Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 230000001954 sterilising effect Effects 0.000 description 3
- 241000700605 Viruses Species 0.000 description 2
- 238000004887 air purification Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000004941 influx Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
- F24F12/002—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F3/1405—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Central Air Conditioning (AREA)
Abstract
The invention provides an air conditioning system, which belongs to the technical field of air conditioning equipment and aims to solve the problem that a heat pipe recovery device in the conventional air conditioning system cannot recover heat in winter, so that the energy consumption is high; the air conditioning system comprises a shell and a heat recovery unit; the heat recovery unit comprises a first heat exchanger, a second heat exchanger and a circulating pump; the first heat exchanger is arranged in the fresh air channel of the shell, and the second heat exchanger is arranged in the exhaust air channel of the shell; the first heat exchanger is communicated with the second heat exchanger, and the circulating pump can suck the secondary refrigerant so as to enable the secondary refrigerant to flow between the first heat exchanger and the second heat exchanger. According to the air conditioning system provided by the invention, the refrigerant can flow between the first heat exchanger and the second heat exchanger all the time under the suction action of the circulating pump, and is not limited by seasons; the heat (cold) in the indoor exhaust air can be recycled, so that the aim of reducing energy consumption is fulfilled, and the load and the running cost of the whole air conditioning system are reduced.
Description
Technical Field
The invention belongs to the field of air conditioning equipment, and particularly relates to an air conditioning system.
Background
The ward and operating room of hospital have high requirement for indoor air environment, and need to keep sending a large amount of fresh air into the room, and the fresh air still needs to have suitable temperature and humidity.
When the existing air conditioning system operates in summer, outdoor high-temperature and high-humidity fresh air can be sent into a room only after being dehumidified, cooled and reheated, and the energy consumption is high. When the air conditioner runs in winter, the indoor air exhaust amount is large, so that a large amount of comfortable indoor air is exhausted outdoors, and the resource waste is serious. In order to solve the above problems, the existing air conditioning system is provided with a heat pipe heat recovery device to exchange heat between indoor exhaust and fresh air, so as to reduce energy consumption and achieve the purpose of energy conservation.
However, since the heat pipe heat recovery device circulates the refrigerant by natural gravity, it cannot operate in reverse direction in winter, and thus heat recovery cannot be performed, resulting in large energy consumption.
Disclosure of Invention
In order to solve the above problems in the prior art, the present application provides an air conditioning system, which can solve the problem that the heat pipe recovery device in the existing air conditioning system cannot recover heat in winter, and thus the energy consumption is large.
The application provides an air conditioning system, includes:
the shell is provided with a fresh air channel and an exhaust channel;
the heat recovery unit comprises a first heat exchanger, a second heat exchanger and a circulating pump; the first heat exchanger is arranged in the fresh air channel, and the second heat exchanger is arranged in the exhaust channel;
the first heat exchanger is in communication with the second heat exchanger, and the circulation pump is capable of drawing coolant so that the coolant flows between the first heat exchanger and the second heat exchanger.
In the above preferred technical solution, the system further comprises a dehumidifying unit, wherein the dehumidifying unit comprises a compressor, a condenser, a throttling device and a dehumidifying heat exchanger which are sequentially communicated;
the dehumidifying heat exchanger is positioned in the fresh air channel and is positioned on one side of the fresh air inlet, far away from the fresh air channel, of the first heat exchanger.
In the above preferred technical solution, the dehumidifying device further includes a condensation reheating heat exchanger, and the condensation reheating heat exchanger is disposed in the fresh air channel;
the condensation reheating heat exchanger is positioned on one side of the throttling device, which is far away from a fresh air inlet of the fresh air channel.
In the above preferred technical solution, a first branch is provided between an outlet of the compressor and an outlet of the condenser, and the first branch is provided with a first regulating valve.
In the above preferred technical solution, a second branch is provided between an inlet of the condensation reheating heat exchanger and an inlet of the throttling device, and the second branch is provided with a bypass valve; and/or
And a second branch is arranged between the inlet of the condensation reheating heat exchanger and the inlet of the throttling device, and a second regulating valve is arranged at the inlet of the condensation reheating heat exchanger.
In the above preferred technical solution, the first purification unit includes a first coarse filter, a first middle-efficiency filter and a sub-high-efficiency filter, which are sequentially disposed in the fresh air channel;
the first coarse filter is arranged close to a fresh air inlet of the fresh air channel, and the sub-high efficiency filter is arranged close to a fresh air outlet of the fresh air channel;
along the air outlet direction, the second purifying unit comprises a second coarse filter, a second medium filter and a high-efficiency filter which are arranged in the air exhaust channel in sequence; the second coarse filter is arranged close to an air return opening of the air exhaust channel, and the high-efficiency filter is arranged close to an air exhaust opening of the air exhaust channel.
In the above preferred technical solution, a first fan wall is provided in the fresh air channel; the first fan wall is positioned between the first coarse filter and the first medium filter and provided with at least two fans;
and a second fan wall is arranged in the air exhaust channel, is close to an air outlet of the air exhaust channel and is provided with at least two fans.
In the above preferred technical solution, the first heat exchanger is located on one side of the first middle-effect filter away from the inlet of the fresh air channel; the second heat exchanger is positioned on one side of the high-efficiency filter, which is far away from the inlet of the exhaust channel.
In the above preferred embodiment, the device further comprises a plurality of germicidal lamps; the bactericidal lamps are arranged in the fresh air channel and the exhaust channel at intervals.
Compared with the prior art, the air conditioning system provided by the application has the following advantages:
the application provides an air conditioning system, it is including setting up the first heat exchanger in the new trend passageway, setting up the second heat exchanger in the passageway of airing exhaust, and first heat exchanger and second heat exchanger intercommunication and form secondary refrigerant circulation system, and under the suction effect of circulating pump, the secondary refrigerant flows in secondary refrigerant circulation system.
This application regards as heat transfer medium with the secondary refrigerant, and the secondary refrigerant can be ethylene glycol solution, and ethylene glycol solution is at the air heat exchange of second heat exchanger and exhaust passageway to reduce (improve) the temperature of ethylene glycol solution, then carry the first heat exchanger to new trend passageway through the ethylene glycol solution that the circulating pump will cool off (heat), and with the air heat exchange in the new trend passageway, in order to reduce (rise) new trend temperature.
Compared with the prior art that the secondary refrigerant circulates by means of gravity, the secondary refrigerant circulating system adopts the glycol solution as the secondary refrigerant, can flow between the first heat exchanger and the second heat exchanger under the suction action of the circulating pump, and is not limited by seasons; the heat (cold) in the indoor exhaust air can be recycled, so that the aim of reducing energy consumption is fulfilled, and the load and the running cost of the whole air conditioning system are reduced.
Moreover, compare with fresh air unit and exhaust fan group do not set up alone among the correlation technique, fresh air channel and the integrated setting of passageway of airing exhaust in this application are in the casing, can reduce installation space and area, the installation of being convenient for.
Drawings
Fig. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a heat recovery unit according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a dehumidification unit according to an embodiment of the present application;
fig. 4 is a first schematic structural diagram of a first fan wall according to an embodiment of the present disclosure;
fig. 5 is a second schematic structural view of the first fan wall according to the embodiment of the present application;
description of reference numerals:
10-a first housing; 11-a fresh air channel; 12-fresh air inlet; 13-fresh air Outlet
20-a second housing; 21-an exhaust channel; 22-air return inlet; 23-an air outlet;
30-a heat recovery unit; 31-a first heat exchanger; 32-a second heat exchanger; 33-a circulation pump;
40-a dehumidification unit; 41-a compressor; 42-a condenser; 43-a condensing reheat heat exchanger; 44-a throttling device; 45-a dehumidification heat exchanger; 46-a refrigerant circulation line; 47-first branch; 471-first regulating valve; 48-a second branch; 481 — bypass valve; 482-a second regulator valve; 49-third branch;
50-a first fan wall; 51-a first fan;
60-a second fan wall; 61-a second fan;
71-a first coarse filter; 72-a first intermediate-efficiency filter; 73-sub-high efficiency filter 74-second coarse efficiency filter; 75-a second medium effect filter; 76-high efficiency filter;
81-auxiliary heater; 82-isothermal humidifier;
90-germicidal lamp.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
As shown in fig. 1 to 3, an air conditioning system provided in an embodiment of the present application includes:
the casing, including first casing 10 and the second casing 20 that links together, first casing 10 and second casing 20 all are the tubular structure, and first casing 10 can set up in the below of second casing 20, and first casing 10 has the cavity in order to form new trend passageway 11, new trend passageway 11's one end and indoor intercommunication, the other end and outdoor intercommunication. The first fan 51 is arranged in the fresh air channel 11, and the outside fresh air can be conveyed to the indoor space under the action of the first fan 51.
Further, the first casing 10 is provided with a fresh air section and an air outlet section, and the fresh air section and the air outlet section respectively belong to the components of the fresh air channel 11. The fresh air section is provided with a fresh air inlet 12, and the fresh air inlet 12 is communicated with the fresh air channel 11; the air outlet section is provided with a fresh air outlet 13, the fresh air outlet 13 can be arranged opposite to the fresh air inlet 12, and the fresh air outlet 13 is communicated with the fresh air channel 11.
The second casing 20 has a cavity to form a discharge passage 21, one end of the discharge passage 21 communicates with the indoor, and the other end of the discharge passage 21 communicates with the outdoor. The second fan 61 is disposed in the exhaust passage 21, and the indoor air can be exhausted to the outdoor by the second fan 61, so as to improve the indoor air quality.
Similarly, the second casing 20 has an air intake section and an air discharge section, and the air intake section and the air discharge section are respectively included in the air discharge duct 21. The air inlet section is provided with an air return opening 22, and the air return opening 22 is communicated with the exhaust channel 21; the air exhaust section is provided with an air exhaust port 23, the air exhaust port 23 can be arranged opposite to the air return port 22, and the air exhaust port 23 is communicated with the air exhaust channel 21.
It can be understood that the first casing 10 and the second casing 20 can be integrally disposed, so as to install the first heat exchanger and the second heat exchanger in the heat recovery unit 30 in the fresh air channel 11 and the exhaust air channel 21, respectively, and also reduce the installation space and the floor space of the whole air conditioning system.
The heat recovery unit 30 provided by the embodiment of the application is used for recycling heat or cold in indoor exhaust air so as to reduce the energy consumption of the whole air conditioning system and reduce the operation cost. The heat recovery unit 30 includes not only the first heat exchanger 31 and the second heat exchanger 32, but also a coolant circulation line connecting the first heat exchanger 31 and the second heat exchanger 32; a circulation pump 33 is provided in the coolant circulation line, and coolant can flow through the coolant circulation line by suction of the circulation pump 33.
The coolant provided by this embodiment may be glycol solution, and when the glycol solution flows to the second heat exchanger 32 located in the exhaust channel 21, the glycol solution exchanges heat with the air exhausted from the room, and the temperature of the glycol solution is reduced (increased). Under the action of the circulating pump 33, the glycol solution flows to the first heat exchanger 31 positioned in the fresh air channel 11, and the glycol solution exchanges heat with the fresh air entering the fresh air channel 11, so that the temperature of the fresh air can be reduced (increased); thereby realizing the recycling of heat (cold) in indoor exhaust air and achieving the purpose of reducing energy consumption.
For example, when the air conditioning system is operated in summer, the indoor exhaust air temperature is 24 ℃, the indoor exhaust air temperature passes through the second heat exchanger 32 and exchanges heat with the glycol solution, and the exhaust air temperature is raised to 30 ℃. The outdoor fresh air temperature is 35 ℃, the fresh air passes through the first heat exchanger 31 and exchanges heat with the glycol solution, and the fresh air temperature can be reduced to 28 ℃.
When the air conditioning system works in winter, the indoor exhaust air temperature is 22 ℃, the indoor exhaust air temperature passes through the second heat exchanger 32 and exchanges heat with the glycol solution, and the exhaust air temperature can be reduced to 16 ℃. The outdoor fresh air temperature is 0 ℃, the fresh air temperature can be increased to 10 ℃ through the first heat exchanger 31 and the heat exchange with the glycol solution.
The embodiment of the application adopts the glycol solution as the secondary refrigerant, can flow between the first heat exchanger 31 and the second heat exchanger 32 all the time under the suction action of the circulating pump 33, is not limited by seasons, can normally operate in winter, and can recycle heat (cold energy) in indoor exhaust air, thereby achieving the purpose of reducing energy consumption and reducing the load and the operating cost of the whole air conditioning system.
On the basis of the above embodiment, the air conditioning system provided by the embodiment of the present application further includes a dehumidifying unit 40, and the dehumidifying unit 40 can dehumidify the high-temperature and high-humidity fresh air introduced into the fresh air channel 11, so that the humidity of the fresh air delivered to the room meets the requirement.
The dehumidification unit 40 provided by the embodiment of the application comprises a compressor 41, a condenser 42, a throttling device 44 and a dehumidification heat exchanger 45, wherein the compressor 41 can be a direct-current variable-frequency compressor, and can realize load variable-frequency regulation; the condenser 42 may be an air-cooled condenser and the restriction 44 may be an expansion valve. The compressor 41, the condenser 42, the throttling device 44, and the dehumidifying heat exchanger 45 may be sequentially communicated through a refrigerant circulation line 46, and form a heat pump refrigeration system.
The compressor 41 and the condenser 42 are disposed outside the fresh air channel 11, the throttling device 44 and the dehumidifying heat exchanger 45 may be disposed between the fresh air section and the air outlet section of the fresh air channel 11, and the dehumidifying heat exchanger 45 is located on a side of the first heat exchanger 31 away from the fresh air inlet 12.
For example, when the air conditioning system operates in summer and dehumidifies the fresh air, the fresh air can be firstly subjected to preliminary precooling through the first heat exchanger 31 and then subjected to deep dehumidification through the dehumidifying heat exchanger 45, and the dehumidified fresh air can be conveyed indoors so as to reduce the refrigerating capacity of the heat pump refrigerating system and reduce the energy consumption of the heat pump refrigerating system.
The process of dehumidifying the fresh air by using the heat pump refrigerating system in the embodiment is as follows:
illustratively, the low-temperature low-pressure gaseous refrigerant is acted by the compressor 41 to generate a high-temperature high-pressure gaseous refrigerant, and the high-temperature high-pressure gaseous refrigerant enters the condenser 42 and exchanges heat with cold air flowing through the condenser 42, so that preliminary condensation can be performed and a high-pressure liquid refrigerant is formed; the low-temperature high-pressure refrigerant after the preliminary temperature reduction passes through a throttling device 44 to form a low-temperature low-pressure refrigerant; the low-temperature low-pressure refrigerant flows into the dehumidifying heat exchanger 45 and exchanges heat with the fresh air precooled by the first heat exchanger 31, and the low-temperature low-pressure refrigerator absorbs heat in the fresh air and evaporates to form low-temperature low-pressure gaseous refrigerant which flows back to the compressor 41. Because the refrigerator absorbs the heat of the fresh air in the dehumidifying heat exchanger 45, the temperature of the fresh air flowing through the dehumidifying heat exchanger 45 can be reduced, so that the moisture in the fresh air is separated out, and the purpose of deeply dehumidifying the fresh air is achieved.
In addition to the above embodiments, the dehumidification unit 40 in this embodiment further includes a condensation reheating heat exchanger 43, the condensation reheating heat exchanger 43 is connected to the refrigerant circulation line 46, and the condensation reheating heat exchanger 43 is located between the throttling device 44 and the condenser 42. With this arrangement, after the refrigerant is primarily condensed in the condenser 42, it is condensed again in the condensation reheat heat exchanger 43, and heat is released.
The condensation reheating heat exchanger 43 is located in the fresh air channel 11 and is close to the fresh air outlet 13 of the fresh air channel 11. Along the fresh air inlet direction, the condensation reheating heat exchanger 43 can be arranged behind the throttling device 44, and the condensation reheating heat exchanger 43 is used for heating up the deeply dehumidified air. The temperature of the fresh air deeply dehumidified by the dehumidification heat exchanger 45 is low, and the fresh air can be heated by the condensation reheating heat exchanger 43, so that the temperature of the fresh air input into the room meets the requirement. So set up, can be used for the new trend after the degree of depth dehumidification with the condensation heat of refrigerant and heat up, need not additionally to set up heating device and heat up the air after the dehumidification, can reduce energy consumption and air conditioning system's cost of manufacture.
Referring to fig. 1, the temperature of the deeply dehumidified fresh air is adjusted by adjusting the condensation heat of the refrigerant flowing into the condensation reheat heat exchanger 43. In the embodiment of the present invention, a first branch 47 is provided between the outlet of the compressor 41 and the outlet of the condenser 42, and the first branch 47 is provided with a first regulation valve 471.
The first branch passage 47 is provided in parallel with the condenser 42, and adjusts the flow rate of the refrigerant flowing into the condenser 42 by controlling the opening degree of the first regulator valve 471. For example, when the first regulating valve 471 is closed, the refrigerant is primarily condensed in the condenser 42, the refrigerant is secondarily condensed in the condensation reheater, and the released heat raises the temperature of the dehumidified fresh air.
When the first adjusting valve 471 is opened by a certain opening degree, part of the refrigerant directly flows into the condensation reheating heat exchanger 43 and is primarily condensed, and the released heat can heat the dehumidified fresh air. So set up, this application embodiment can carry out rational distribution to the condensation heat of refrigerant through the aperture of the first governing valve 471 of control to reach the effect of the new trend temperature after the adjustment dehumidification.
In addition to the above embodiment, the throttle device 44 on the refrigerant circulation line 46 is provided with the second branch line 48 between the inlet of the throttle device 44 and the inlet of the condensation reheat heat exchanger 43, the second branch line 48 is provided with the bypass valve 481, that is, the bypass is provided between the throttle device 44 and the condensation reheat heat exchanger 43, and the bypass is provided with the bypass valve 481.
In the present embodiment, by adjusting the opening degree of the bypass valve 481, a part of the refrigerant can enter the dehumidifying heat exchanger 45 after passing through the throttling device 44; part of the refrigerant can flow to the condensing reheating heat exchanger 43 and the throttling device 44 and then enters the dehumidifying heat exchanger 45; therefore, the condensing heat flowing into the condensing and reheating heat exchanger 43 and the refrigerating capacity of the refrigerant flowing into the dehumidifying heat exchanger 45 are adjusted, and the temperature of the dehumidified fresh air can be adjusted.
For example, the first regulating valve 471 of the first branch 47 is closed, the refrigerant condensed by the condenser 42, part of the refrigerant flowing into the dehumidifying heat exchanger 45 after the secondary condensation of the condensing and reheating heat exchanger 43, and part of the refrigerant flowing into the dehumidifying heat exchanger 45 after the primary condensation of the condenser 42; therefore, the refrigerating capacity of the refrigerant in the dehumidifying heat exchanger 45 and the condensation heat of the refrigerant in the condensation reheating heat exchanger 43 are adjusted, and the temperature of fresh air discharged to the indoor space can be adjusted.
It is understood that a second branch 48 is provided between the inlet of the throttling device 44 and the condensation reheat heat exchanger 43, and a second regulating valve 482 may be provided at the inlet of the condensation reheat heat exchanger 43. With this arrangement, in the present embodiment, the opening degree of the second adjusting valve 482 is adjusted to adjust the flow rates of the refrigerants flowing into the condensation and reheating heat exchanger 43 and the dehumidification heat exchanger 45, so as to adjust the cooling capacity of the refrigerant in the dehumidification heat exchanger 45 and the condensation heat of the refrigerant in the condensation and reheating heat exchanger 43, and adjust the temperature of the fresh air discharged to the indoor space.
In another embodiment, a second branch 48 is provided between the inlet of the throttling device 44 and the condensation reheat heat exchanger 43, and a bypass valve 481 is provided on the second branch 48; meanwhile, a second regulating valve 482 may also be provided at the inlet of the condensation reheat heat exchanger 43. Under the combined action of the bypass valve 481 and the second regulating valve 482, the flow rates of the refrigerants flowing into the condensation reheating heat exchanger 43 and the dehumidification heat exchanger 45 are regulated, so that the temperature of fresh air discharged to the indoor space can be regulated.
On the basis of the above embodiment, the refrigerant circulation line 46 of the present embodiment is further provided with a third branch 49, and the third branch 49 is arranged in parallel with the first branch 47; one end of the third branch 49 is connected to the refrigerant circulation line 46 at a position between the inlet of the condensation-reheat heat exchanger 43 and the outlet of the condenser 42, and the other end of the third branch 49 communicates with the dehumidification heat exchanger 45.
The third branch 49 is provided with a check valve and a throttling device 44, when the dehumidification strength to the fresh air needs to be increased, the second adjusting valve 482 and the bypass valve 481 can be closed, so that the refrigerant can flow to the dehumidification heat exchanger 45 through the third branch 49, and the refrigerating capacity of the dehumidification heat exchanger 45 is increased.
Referring to fig. 1, the air conditioning system provided in this embodiment includes a first purification unit and a second purification unit; the first purifying unit is arranged in the fresh air channel 11 and at least comprises a filter for removing dust and purifying air introduced into the fresh air channel 11; the second purifying unit is arranged in the exhaust channel 21 and at least comprises a filter for purifying and sterilizing indoor exhaust air.
Further, according to the requirement of fresh air purification, the first purification unit can include a first coarse filter 71, a first middle-efficiency filter 72 and a sub-high-efficiency filter 73, and along the fresh air inlet direction, the first coarse filter 71, the second middle-efficiency filter 72 and the sub-high-efficiency filter 73 are sequentially arranged in the fresh air channel 11.
The first coarse filter 71 is located in the fresh air section of the fresh air channel 11 and is arranged close to the fresh air inlet 12, so that fresh air flowing into the fresh air channel 11 can be subjected to primary filtration, and particles with large particle sizes in the air can be removed. Further, the first coarse filter 71 can be arranged on one side of the fan close to the fresh air inlet 12, so that air entering the fresh air channel 11 can pass through the first coarse filter 71 and then pass through the first fan 51, and large-particle-size particles in the outside fresh air are prevented from polluting the first fan 51, so that the reliability of the first fan 51 is improved, and the service life of the first fan 51 is prolonged.
The first intermediate-efficiency filter 72 can filter small-particle-size particles in the fresh air. The first intermediate-efficiency filter 72 is disposed between the first fan 51 and the first heat exchanger 31, that is, the first intermediate-efficiency filter is located on one side of the first heat exchanger 31 close to the fresh air inlet 12. So set up, can make the new trend that gets into in the new trend passageway 11 through first coarse filter 71, first medium efficiency filter 72 after, can carry out the heat exchange with first heat exchanger 31, can avoid the adhesion of path particulate matter etc. in the air to breed the bacterium on the surface of first heat exchanger 31.
Inferior high efficiency filter 73 sets up in the air-out section of new trend passageway 11 to be close to new trend export 13 setting, it can further filter the micronic dust of the air of influx new trend passageway 11 in, promotes new trend quality.
According to the indoor exhaust air purification requirement, the second purification unit comprises a second coarse filter 74, a second medium filter 75 and a high efficiency filter 76. In the air outlet direction, a second coarse filter 74, a second intermediate filter 75, and a high efficiency filter 76 are arranged in this order in the discharge duct 21. Wherein the second coarse filter 74 may be disposed near the air return opening 22 of the exhaust passage 21, and the high efficiency filter 76 may be disposed near the exhaust opening 23 of the exhaust passage 21. The functions of the second coarse filter 74 and the second intermediate filter 75 are the same as those of the first coarse filter 71 and the first intermediate filter 72, and are not described again here.
The high efficiency filter 76 can kill the virus in the indoor exhaust air, and the high efficiency filter 76 is arranged on the side of the second heat exchanger 32 close to the air return opening 22 in the embodiment. With this arrangement, adhesion of viruses in the exhaust air to the surface of the second heat exchanger 32 can be prevented.
It should be understood that the first coarse filter 71, the first intermediate filter 72, and the sub-high efficiency filter 73 included in the first purification unit, and the second coarse filter 74, the second intermediate filter 75, and the high efficiency filter 76 included in the second purification unit are only one of the embodiments, and are not limited to the embodiment.
For example, when the air conditioning system is applied to a clean area with epidemic prevention, only a coarse filter and a medium filter are arranged in the fresh air channel 11 to perform two-stage filtration on fresh air; without having sub-efficient filtration. In such an environment, the exhaust duct 21 may be arranged with only a coarse filter.
When the air conditioning system is applied to a semi-polluted area and a polluted area combined with epidemic prevention, the fresh air channel 11 can be internally provided with three-stage filtration of a coarse filter, a medium filter and a sub-high efficiency filter; can be provided with coarse filter, medium efficiency filter, high efficiency filter in the passageway 21 of airing exhaust and carry out tertiary filtration to indoor exhaust, this scheme is the preferred scheme of this embodiment to promote air conditioning system's suitability, promote the purifying effect of new trend.
As shown in fig. 4 and 5, in the air conditioning system provided in this embodiment, a first fan wall 50 is disposed in the fresh air channel 11, the first fan wall 50 is disposed with at least two first fans 51, and the first fan wall 50 may be disposed between the first coarse filter 71 and the first middle filter 72 to prevent large-diameter particles in the fresh air from adhering to the first fans 51.
Likewise, a second fan wall 60 is provided in the exhaust duct 21, the second fan wall 60 is provided with at least two second fans 61, and the second fan wall 60 is provided near the exhaust outlet 23 of the exhaust duct 21, which may be provided at a side of the second heat exchanger 32 near the exhaust outlet 23.
In the related art, the fresh air channel 11 and the exhaust air channel 21 are respectively provided with a fan, and the fan usually adopts a variable frequency fan, which can adjust the frequency according to a blast pipe differential pressure transmitter to ensure the blast pressure. The fan frequency is usually operated at 40-50Hz in practical engineering debugging, and the lower operation limit is 25 Hz. When the running frequency of the fan is 25Hz, the air output is reduced to 50 percent, the requirement that the fresh air quantity is reduced from 6 times/h to 3 times/h can be met, but the air supply pressure is reduced to 25 percent, and the requirement that the basic air supply pressure cannot be ensured due to too low air pressure can be met. Therefore, in the related art, the fresh air channel 11 and the exhaust air channel 21 are only provided with one fan, the air volume adjusting range is narrow, the air supply pressure cannot be ensured, and the requirement of fresh air volume in the epidemic prevention mode cannot be met.
However, in this embodiment, at least two first fans 51 are disposed in the fresh air channel 11, and at least two second fans 61 are disposed in the exhaust air channel 21, so that the number of fans can be selected according to different modes, the air volume adjusting range can be increased, and the air volume requirements in different modes can be met.
Illustratively, 2 or 4 first fans 51 are arranged side by side on the first fan wall 50; similarly, 2 or 4 second fans 61 are arranged side by side on the second fan wall 60. Taking the negative pressure ward as an example, the minimum fresh air volume is 2 times/h at ordinary times, and the minimum fresh air volume is 6 times/h under special conditions. Under the special condition, can be with the first fan 51 in the new trend passageway 11 full-open, the second fan 61 in the passageway 21 of airing exhaust is full-open, can undertake the fresh air volume by a plurality of fans to avoid the fan operation lower limit to hang down excessively, lead to the wind pressure less can't satisfy the air supply requirement. When the wind power generation device operates at ordinary times, part of the first fans 51 can be selected to work, and part of the second fans 61 can work, so that normal output of wind pressure and wind volume is ensured.
Referring to fig. 1, on the basis of the above embodiment, the air conditioning system provided in the embodiment of the present application further includes an auxiliary heater 81 and an isothermal humidifier 82, where the auxiliary heater 81 and the isothermal humidifier 82 are disposed in the fresh air channel 11 and are close to the fresh air outlet 13; namely, the auxiliary heater 81 and the isothermal humidifier 82 are positioned at the air outlet section of the fresh air channel 11.
Specifically, the auxiliary heater 81 may be disposed between the condensation reheating heat exchanger 43 and the isothermal humidifier 82, and the auxiliary heater 81 is configured to further regulate and raise the temperature of the fresh air passing through the condensation reheating heat exchanger 43, so that the temperature of the fresh air delivered to the room meets the requirement. The heating manner of the auxiliary heater 81 may be one or a combination of electric heating, hot water heating, or steam heating.
The isothermal humidifier 82 is used for adjusting the humidity of the dehumidified fresh air, or when the air runs in winter, the fresh air does not need to be deeply dehumidified, and the isothermal humidifier 82 needs to be started to adjust the humidity of the fresh air. The humidification mode of the isothermal humidifier 82 may be one or a combination of electrode humidification, electro-thermal humidification, or dry vapor humidification.
Further, the air conditioning system provided by the embodiment of the present application further includes a plurality of germicidal lamps 90, and the germicidal lamps 90 may be ultraviolet germicidal lamps, and are used for sterilizing and disinfecting air flowing into the fresh air channel 11 and the exhaust air channel 21. It can be understood that a plurality of germicidal lamps 90 can be arranged in the fresh air channel 11 and the exhaust air channel 21 at intervals to improve the sterilizing effect.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. An air conditioning system, comprising:
the shell is provided with a fresh air channel and an exhaust channel;
the heat recovery unit comprises a first heat exchanger, a second heat exchanger and a circulating pump; the first heat exchanger is arranged in the fresh air channel, and the second heat exchanger is arranged in the exhaust channel;
the first heat exchanger is in communication with the second heat exchanger, and the circulation pump is capable of drawing coolant so that the coolant flows between the first heat exchanger and the second heat exchanger.
2. The air conditioning system of claim 1, further comprising a dehumidification unit;
the dehumidification unit comprises a compressor, a condenser, a throttling device and a dehumidification heat exchanger which are sequentially communicated;
the dehumidifying heat exchanger is positioned in the fresh air channel and is positioned on one side of the fresh air inlet, far away from the fresh air channel, of the first heat exchanger.
3. The air conditioning system as claimed in claim 2, wherein the dehumidifying device further comprises a condensation reheating heat exchanger disposed in the fresh air channel;
the condensation reheating heat exchanger is positioned on one side of the throttling device, which is far away from a fresh air inlet of the fresh air channel.
4. An air conditioning system according to claim 3, wherein a first branch is provided between the outlet of the compressor and the outlet of the condenser, the first branch being provided with a first regulating valve.
5. The air conditioning system as claimed in claim 4, wherein a second branch is arranged between the inlet of the condensation reheating heat exchanger and the inlet of the throttling device, and the second branch is provided with a bypass valve; and/or
And a second branch is arranged between the inlet of the condensation reheating heat exchanger and the inlet of the throttling device, and a second regulating valve is arranged at the inlet of the condensation reheating heat exchanger.
6. An air conditioning system according to any one of claims 1 to 5, wherein the fresh air channel is provided with a first purification unit, the first purification unit comprising at least one filter;
the air exhaust channel is provided with a second purifying unit, and the second purifying unit at least comprises a filter.
7. The air conditioning system of claim 6, wherein the first purifying unit comprises a first coarse filter, a first medium-efficiency filter and a sub-high-efficiency filter which are sequentially arranged in the fresh air channel along the air inlet direction;
the first coarse filter is arranged close to a fresh air inlet of the fresh air channel, and the sub-high efficiency filter is arranged close to a fresh air outlet of the fresh air channel;
along the air outlet direction, the second purifying unit comprises a second coarse filter, a second medium filter and a high-efficiency filter which are arranged in the air exhaust channel in sequence;
the second coarse filter is arranged close to an air return opening of the air exhaust channel, and the high-efficiency filter is arranged close to an air exhaust opening of the air exhaust channel.
8. The air conditioning system of claim 7, wherein a first fan wall is disposed within the fresh air channel;
the first fan wall is positioned between the first coarse filter and the first medium filter and provided with at least two fans;
and a second fan wall is arranged in the air exhaust channel, is close to an air exhaust port of the air exhaust channel and is provided with at least two fans.
9. The air conditioning system of claim 7, wherein the first heat exchanger is located on a side of the first intermediate-efficiency filter away from a fresh air inlet of the fresh air channel;
the second heat exchanger is positioned on one side of the high-efficiency filter, which is far away from the air return inlet of the exhaust channel.
10. The air conditioning system of any of claims 1 to 5, further comprising a plurality of germicidal lamps;
the bactericidal lamps are arranged in the fresh air channel and the exhaust channel at intervals.
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| CN202110396861.6A CN113137672B (en) | 2021-04-13 | 2021-04-13 | Air conditioning system |
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| CN202110396861.6A CN113137672B (en) | 2021-04-13 | 2021-04-13 | Air conditioning system |
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| CN113137672B CN113137672B (en) | 2023-06-16 |
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| CN114110821A (en) * | 2021-11-15 | 2022-03-01 | 金国达科技（湖南）有限公司 | Multi-stage heat recovery fresh air system of central air conditioner |
| CN114234280A (en) * | 2021-12-20 | 2022-03-25 | 珠海格力电器股份有限公司 | Fresh air conditioning unit and control method thereof |
| CN114440432A (en) * | 2022-02-11 | 2022-05-06 | 河北工业大学 | Integral fresh air dehumidification all-in-one machine adopting pulsating heat pipes for heat recovery |
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| CN110470028A (en) * | 2019-09-12 | 2019-11-19 | 青岛云创环境科技有限公司 | Constant temperature low humidity unit |
| CN211041202U (en) * | 2019-12-16 | 2020-07-17 | 湖南红橡室内气候技术有限公司 | Fresh air humidifying unit with double cold and heat sources |
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| WO2013131436A1 (en) * | 2012-03-05 | 2013-09-12 | Rong Guohua | Air-conditioning unit with heat recovery |
| CN105276736A (en) * | 2015-11-25 | 2016-01-27 | 南通华信中央空调有限公司 | Heat pump type total heat recovery new-air air conditioning unit with condensation reheating function |
| CN110470028A (en) * | 2019-09-12 | 2019-11-19 | 青岛云创环境科技有限公司 | Constant temperature low humidity unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114110821A (en) * | 2021-11-15 | 2022-03-01 | 金国达科技（湖南）有限公司 | Multi-stage heat recovery fresh air system of central air conditioner |
| CN114234280A (en) * | 2021-12-20 | 2022-03-25 | 珠海格力电器股份有限公司 | Fresh air conditioning unit and control method thereof |
| CN114234280B (en) * | 2021-12-20 | 2022-09-30 | 珠海格力电器股份有限公司 | Fresh air conditioning unit and control method thereof |
| CN114440432A (en) * | 2022-02-11 | 2022-05-06 | 河北工业大学 | Integral fresh air dehumidification all-in-one machine adopting pulsating heat pipes for heat recovery |
| CN114440432B (en) * | 2022-02-11 | 2023-06-02 | 河北工业大学 | Integrated fresh air dehumidification all-in-one machine adopting pulsating heat pipe for heat recovery |
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| CN113137672B (en) | 2023-06-16 |
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