CN113137672B - Air conditioning system - Google Patents
Air conditioning system Download PDFInfo
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- CN113137672B CN113137672B CN202110396861.6A CN202110396861A CN113137672B CN 113137672 B CN113137672 B CN 113137672B CN 202110396861 A CN202110396861 A CN 202110396861A CN 113137672 B CN113137672 B CN 113137672B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 42
- 239000003507 refrigerant Substances 0.000 claims abstract description 52
- 238000011084 recovery Methods 0.000 claims abstract description 15
- 238000009833 condensation Methods 0.000 claims description 33
- 230000005494 condensation Effects 0.000 claims description 33
- 238000003303 reheating Methods 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000001954 sterilising effect Effects 0.000 claims description 6
- 230000002070 germicidal effect Effects 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 31
- 238000007791 dehumidification Methods 0.000 description 13
- 238000001816 cooling Methods 0.000 description 8
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 239000002826 coolant Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 206010035148 Plague Diseases 0.000 description 3
- 241000607479 Yersinia pestis Species 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 241000700605 Viruses Species 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000010354 integration 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
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping 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
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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 the heat pipe recovery device in the existing 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 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 refrigerating medium can always flow between the first heat exchanger and the second heat exchanger under the suction effect of the circulating pump, and the air conditioning system is not limited by seasons; the heat (cold quantity) 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 the hospital have high requirements on indoor air environment, a large amount of fresh air needs to be fed into the room, and the fresh air needs to have proper temperature and humidity.
When the existing air conditioning system operates in summer, the outdoor high-temperature and high-humidity fresh air can be sent into a room only after dehumidification, cooling and reheating, and the energy consumption is high. When the indoor air conditioner operates in winter, the indoor air discharge quantity is large, so that a large amount of indoor comfortable air is discharged 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 air and fresh air, so as to reduce energy consumption and achieve the purpose of energy conservation.
However, since the heat pipe heat recovery apparatus circulates the refrigerant by means of natural gravity, the reverse direction cannot be operated in winter, and thus heat recovery cannot be performed, resulting in a large energy consumption.
Disclosure of Invention
In order to solve the above-mentioned problem in the prior art, the application provides an air conditioning system, can solve the heat pipe recovery device in the current air conditioning system and can't carry out heat recovery winter, and lead to the great problem of energy consumption.
The application provides 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 pumping the coolant such that the coolant flows between the first heat exchanger and the second heat exchanger.
In the above preferred technical scheme, the system further comprises a dehumidifier unit, wherein the dehumidifier unit comprises a compressor, a condenser, a throttling device and a dehumidifying heat exchanger which are sequentially communicated;
the dehumidifying heat exchanger is located in the fresh air channel and located on one side, away from the fresh air inlet of the fresh air channel, of the first heat exchanger.
In the above preferred technical solution, the dehumidifying device further includes a condensation reheat heat exchanger, and the condensation reheat heat exchanger is disposed in the fresh air channel;
the condensation reheating heat exchanger is located at one side of the throttling device, which is far away from the fresh air inlet of the fresh air channel.
In the above preferred technical solution, a first branch is disposed between the outlet of the compressor and the 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 arranged between the inlet of the condensation reheat heat exchanger and the inlet of the throttling device, and the second branch is provided with a bypass valve; and/or
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 purifying unit includes a first coarse filter, a first intermediate filter, and a sub-high efficiency filter that 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;
the second purifying unit comprises a second coarse filter, a second medium-efficiency filter and a high-efficiency filter which are sequentially arranged in the exhaust channel along the air outlet direction; the second coarse filter is arranged close to the air return opening of the air exhaust channel, and the high-efficiency filter is arranged close to the air exhaust opening of the air exhaust channel.
In the above preferred technical solution, a first fan wall is disposed in the fresh air channel; the first fan wall is positioned between the first coarse filter and the first medium-efficiency filter, and is provided with at least two fans;
the exhaust channel is internally provided with a second fan wall, the second fan wall is close to an air outlet of the exhaust channel, and the second fan wall is provided with at least two fans.
In the above preferred technical solution, the first heat exchanger is located at a side of the first intermediate-efficiency filter away from the inlet of the fresh air channel; the second heat exchanger is positioned at one side of the high-efficiency filter away from the inlet of the exhaust channel.
In the above preferred technical solution, the device further comprises a plurality of germicidal lamps; the sterilizing lamps are arranged in the fresh air channel and the exhaust channel at intervals.
Compared with the related 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 at the first heat exchanger in fresh air passageway, setting up the second heat exchanger in the passageway of airing exhaust, and first heat exchanger and second heat exchanger intercommunication and form the secondary refrigerant circulation system, under the suction effect of circulating pump, the secondary refrigerant flows in the secondary refrigerant circulation system.
The utility model provides an use secondary refrigerant as heat transfer medium, secondary refrigerant can be ethylene glycol solution, and the ethylene glycol solution is at the second heat exchanger with the air heat exchange of passageway of airing exhaust to reduce (improve) the temperature of ethylene glycol solution, then carry the first heat exchanger of new trend passageway with the ethylene glycol solution of cooling (heating) through the circulating pump to with the air heat exchange in the new trend passageway, in order to reduce (increase) new trend temperature.
Compared with the prior art that the gravity is used for circulating the secondary refrigerant, the ethylene glycol solution is adopted as the secondary refrigerant, and can flow between the first heat exchanger and the second heat exchanger under the suction effect of the circulating pump, so that the secondary refrigerant is not limited by seasons; the heat (cold quantity) 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.
Furthermore, compare with fresh air unit and exhaust unit set up alone respectively among the correlation technique, fresh air channel and exhaust channel integration in this application set up in the casing, reducible 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 disclosure;
fig. 3 is a schematic structural diagram of a dehumidifier unit according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a first fan wall according to an embodiment of the present disclosure;
fig. 5 is a second schematic structural diagram of a first fan wall according to an embodiment of the present disclosure;
reference numerals illustrate:
10-a first housing; 11-a fresh air channel; 12-a fresh air inlet; 13-fresh air outlet
20-a second housing; 21-an exhaust channel; 22-an air return port; 23-an exhaust outlet;
30-a heat recovery unit; 31-a first heat exchanger; 32-a second heat exchanger; 33-a circulation pump;
40-a dehumidifier unit; 41-a compressor; 42-a condenser; 43-condensing reheat heat exchanger; 44-throttling means; 45-dehumidifying heat exchanger; 46-a refrigerant circulation line; 47-a first branch; 471-first regulator valve; 48-a second branch; 481-a bypass valve; 482-a second regulator valve; 49-a third leg;
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 neutral filter; 73-sub-high efficiency filter 74-second coarse efficiency filter; 75-a second neutral-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 merely for explaining the technical principles 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 link together, first casing 10 and second casing 20 all are 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 fresh air passageway 11, and fresh air passageway 11's one end communicates with indoor, and the other end communicates with outdoor. The fresh air channel 11 is internally provided with a first fan 51, and external fresh air can be conveyed indoors under the action of the first fan 51.
Further, the first housing 10 is provided with a fresh air section and an air outlet section, which 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-out section is provided with new trend export 13, and new trend export 13 can set up with new trend entry 12 relatively, and new trend export 13 and new trend passageway 11 intercommunication.
The second housing 20 has a cavity to form an exhaust passage 21, one end of the exhaust passage 21 communicates with the indoor space, and the other end of the exhaust passage 21 communicates with the outdoor space. The exhaust passage 21 is provided therein with a second fan 61, and indoor air can be discharged to the outside under the action of the second fan 61 to improve indoor air quality.
Similarly, the second housing 20 has an air intake section and an air exhaust section, and the air intake section and the air exhaust section respectively belong to the constituent parts of the air exhaust passage 21. The air inlet section is provided with an air return opening 22, and the air return opening 22 is communicated with the air exhaust channel 21; the exhaust section is provided with an exhaust outlet 23, the exhaust outlet 23 can be opposite to the return air inlet 22, and the exhaust outlet 23 is communicated with the exhaust channel 21.
It can be understood that the first casing 10 and the second casing 20 may be integrally disposed, so that the first heat exchanger and the second heat exchanger in the heat recovery unit 30 are respectively installed in the fresh air channel 11 and the air exhaust channel 21, and the installation space and the occupied area of the whole air conditioning system are reduced.
The heat recovery unit 30 provided in the embodiment of the application is used for recycling heat or cold in indoor exhaust air, so that the energy consumption of the whole air conditioning system is reduced, and the running cost is reduced. The heat recovery unit 30 not only comprises the first heat exchanger 31 and the second heat exchanger 32, but also comprises a secondary refrigerant circulation pipeline connected with the first heat exchanger 31 and the second heat exchanger 32; the coolant circulation line is provided with a circulation pump 33, and the coolant can flow in the coolant circulation line under the suction of the circulation pump 33.
The coolant provided in this embodiment may be a glycol solution, which is heat exchanged with the air discharged from the room when flowing to the second heat exchanger 32 located in the exhaust duct 21, and whose temperature is lowered (raised). 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 (raised); thereby realizing the recycling of heat (cold quantity) 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 ℃, passes through the second heat exchanger 32 and exchanges heat with the glycol solution, and the exhaust air temperature is increased to 30 ℃. The outdoor fresh air temperature is 35 ℃, passes through the first heat exchanger 31, exchanges heat with the glycol solution, and can be reduced to 28 ℃.
When the air conditioning system works in winter, the indoor exhaust temperature is 22 ℃, the indoor exhaust temperature passes through the second heat exchanger 32 and exchanges heat with the glycol solution, and the exhaust temperature can be reduced to 16 ℃. The outdoor fresh air temperature is 0 ℃, passes through the first heat exchanger 31 and exchanges heat with the glycol solution, and the fresh air temperature can be raised to 10 ℃.
According to the embodiment of the application, the glycol solution is used as the secondary refrigerant, and can always flow between the first heat exchanger 31 and the second heat exchanger 32 under the suction effect of the circulating pump 33, so that the secondary refrigerant is not limited by seasons, can normally run in winter, and can recycle the heat (cold quantity) in indoor exhaust air, thereby achieving the purpose of reducing energy consumption and reducing the load and running cost of the whole air conditioning system.
On the basis of the above embodiment, the air conditioning system provided in the embodiment of the present application further includes a dehumidifier unit 40, where the dehumidifier unit 40 may 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 into the room meets the requirements.
The dehumidifier unit 40 provided in the embodiment of the present application includes a compressor 41, a condenser 42, a throttling device 44, and a dehumidifying heat exchanger 45, where the compressor 41 may be a dc variable-frequency compressor, which can implement load variable-frequency adjustment; the condenser 42 may be an air cooled condenser and the restriction device 44 may be an expansion valve. The compressor 41, the condenser 42, the throttle device 44, and the dehumidifying heat exchanger 45 may be sequentially connected through a refrigerant circulation line 46, and form a heat pump refrigeration system.
The compressor 41 and the condenser 42 are arranged outside the fresh air channel 11, the throttle device 44 and the dehumidifying heat exchanger 45 may be arranged between the fresh air section and the air outlet section of the fresh air channel 11, and the dehumidifying heat exchanger 45 is located at a side of the first heat exchanger 31 remote from the fresh air inlet 12.
For example, when the air conditioning system operates in summer and dehumidifies the fresh air, the fresh air may be pre-cooled by the first heat exchanger 31, then deeply dehumidified by the dehumidifying heat exchanger 45, and the dehumidified fresh air may be delivered to the room to reduce the cooling capacity of the heat pump cooling system, thereby reducing the energy consumption of the heat pump cooling system.
In this embodiment, the process of dehumidifying fresh air by using the heat pump refrigeration system is as follows:
illustratively, the low-temperature low-pressure gaseous refrigerant is acted by the compressor 41 to generate 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 to perform preliminary condensation and form high-pressure liquid refrigerant; the low-temperature and high-pressure refrigerant after preliminary cooling passes through the throttling device 44 to form a low-temperature and 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 refrigerant absorbs heat in the fresh air and evaporates to form low-temperature low-pressure gaseous refrigerant and 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.
On the basis of the above embodiment, the dehumidifier unit 40 in this embodiment further includes a condensation reheat heat exchanger 43, the condensation reheat heat exchanger 43 is connected to the refrigerant circulation line 46, and the condensation reheat heat exchanger 43 is located between the throttling device 44 and the condenser 42. With this arrangement, the refrigerant can be preliminarily condensed in the condenser 42, and then, can be condensed again in the condensing and reheating heat exchanger 43, and the heat is released.
The condensing reheat heat exchanger 43 is located in the fresh air channel 11 and is disposed close to the fresh air outlet 13 of the fresh air channel 11. Along the fresh air inlet direction, a condensation reheat heat exchanger 43 can be arranged behind the throttling device 44, and the condensation reheat heat exchanger 43 is used for heating the deeply dehumidified air. The temperature of the fresh air deeply dehumidified by the dehumidification heat exchanger 45 is lower, 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. By the arrangement, the condensation heat of the refrigerant can be used for heating fresh air after deep dehumidification, a heating device is not required to be additionally arranged for heating dehumidified air, and energy consumption and manufacturing cost of an air conditioning system can be reduced.
Referring to fig. 1, in order to adjust the condensation heat of the refrigerant flowing into the condensation reheat heat exchanger 43, the fresh air temperature after deep dehumidification is adjusted. The embodiment of the present application is provided with a first branch 47 between the outlet of the compressor 41 and the outlet of the condenser 42, the first branch 47 being provided with a first regulating valve 471.
The first branch 47 is provided in parallel with the condenser 42, and the flow rate of the refrigerant flowing into the condenser 42 is adjusted 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 condenser-reheater, and the released heat heats up the dehumidified fresh air.
When the first regulating valve 471 is opened to a certain opening degree, part of the refrigerant directly flows into the condensing and reheating heat exchanger 43 and is primarily condensed, and the heat released by the first regulating valve can raise the temperature of the dehumidified fresh air. So set up, this application embodiment through the aperture of control first governing valve 471, can carry out reasonable distribution to the condensation heat of refrigerant to reach the effect of the new trend temperature after the adjustment dehumidification.
On the basis of the above embodiment, the throttle device 44 located on the refrigerant circulation line 46 is provided with the second branch 48 between its inlet and the inlet of the condensate reheat heat exchanger 43, the second branch 48 is provided with the bypass valve 481, i.e., the throttle device 44 and the condensate reheat heat exchanger 43 are provided with a bypass therebetween, and the bypass is provided with the bypass valve 481.
In this embodiment, by adjusting the opening of the bypass valve 481, part of the refrigerant can bypass the throttle device 44 and enter the dehumidifying heat exchanger 45; part of the refrigerant can flow to the condensing and reheating heat exchanger 43 and the throttling device 44 and then enter the dehumidifying heat exchanger 45; thereby, the condensation heat flowing into the condensation reheating heat exchanger 43 and the refrigerating capacity of the refrigerant flowing into the dehumidifying heat exchanger 45 are regulated, and the dehumidified fresh air temperature can be regulated.
For example, the first regulating valve 471 of the first branch 47 is closed, the refrigerant condensed by the condenser 42, wherein a part of the refrigerant flows into the dehumidifying heat exchanger 45 after being secondarily condensed by the condensing and reheating heat exchanger 43, and a part of the refrigerant flows into the dehumidifying heat exchanger 45 after being primarily condensed by the condenser 42; the amount of cooling of the refrigerant in the dehumidification heat exchanger 45 and the heat of condensation of the refrigerant in the condensation reheat heat exchanger 43 are adjusted, and the temperature of fresh air discharged into the room can be adjusted.
It will be appreciated that a second bypass 48 is provided between the inlet of the restriction 44 and the condensate reheat heat exchanger 43, and a second regulator valve 482 may be provided at the inlet of the condensate reheat heat exchanger 43. In this way, in the present embodiment, the opening degree of the second adjustment valve 482 is adjusted to adjust the flow rate of the refrigerant flowing into the condensation reheat heat exchanger 43 and the dehumidification heat exchanger 45, thereby adjusting the cooling capacity of the refrigerant in the dehumidification heat exchanger 45 and the condensation heat of the refrigerant in the condensation reheat heat exchanger 43, and adjusting the temperature of the fresh air discharged into the room.
In another embodiment, a second branch 48 is arranged between the inlet of the throttling device 44 and the condensing and reheating heat exchanger 43, and a bypass valve 481 is arranged on the second branch 48; meanwhile, a second regulation valve 482 may be provided at the inlet of the condensate reheat heat exchanger 43. The bypass valve 481 and the second regulating valve 482 cooperate to regulate the flow rate of the refrigerant flowing into the condensation reheat heat exchanger 43 and the dehumidification heat exchanger 45, thereby regulating the temperature of the fresh air discharged into the room.
On the basis of the above embodiment, the refrigerant circulation line 46 of the present embodiment is further provided with a third branch line 49, and the third branch line 49 is provided in parallel with the first branch line 47; one end of the third branch 49 is connected to the refrigerant circulation line 46, and the connection position is located 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 is communicated with the dehumidification heat exchanger 45.
The third branch 49 is provided with a check valve and a throttle device 44, when the dehumidification force of fresh air needs to be increased, the second regulating 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, an air conditioning system provided in this embodiment includes a first purifying unit and a second purifying unit; the first purifying unit is arranged in the fresh air channel 11 and at least comprises a filter for dedusting and purifying the air introduced into the fresh air channel 11; the second purifying unit is arranged in the exhaust channel 21, and the second purifying unit at least comprises a filter for purifying and sterilizing indoor exhaust air.
Further, according to the fresh air purifying requirement, the first purifying unit may include a first coarse filter 71, a first medium-efficiency filter 72 and a sub-high-efficiency filter 73, and the first coarse filter 71, the second medium-efficiency filter 72 and the sub-high-efficiency filter 73 are sequentially disposed in the fresh air channel 11 along the fresh air inlet direction.
The first coarse filter 71 is located in the fresh air section of the fresh air channel 11 and is disposed near the fresh air inlet 12, and can perform preliminary filtration on the fresh air flowing into the fresh air channel 11, so as to remove large-particle-size particles in the air. Further, the first coarse filter 71 may be disposed on a side of the fan near the fresh air inlet 12, so that the air entering the fresh air channel 11 may pass through the first coarse filter 71 and then pass through the first fan 51, so as to avoid the pollution of the first fan 51 by large-particle-size particles in the external fresh air, thereby improving the reliability and service life of the first fan 51.
The first intermediate filter 72 may filter small particle size particulate matter in the fresh air. The first intermediate filter 72 is arranged between the first fan 51 and the first heat exchanger 31, i.e. the first intermediate filter is located on the side of the first heat exchanger 31 close to the fresh air inlet 12. By this arrangement, the fresh air entering the fresh air passage 11 can exchange heat with the first heat exchanger 31 after passing through the first coarse filter 71 and the first medium filter 72, and bacteria can be prevented from growing due to adhesion of small-diameter particulate matters in the air to the surface of the first heat exchanger 31.
The sub-high efficiency filter 73 is arranged at the air outlet section of the fresh air channel 11 and is arranged near the fresh air outlet 13, and can further filter the dust particles flowing into the air in the fresh air channel 11, so that the fresh air quality is improved.
The second purification unit includes a second coarse filter 74, a second medium filter 75, and a high efficiency filter 76 according to the indoor exhaust purification requirements. In the air-out direction, a second coarse filter 74, a second medium filter 75, and a high efficiency filter 76 are arranged in this order in the exhaust passage 21. The second coarse filter 74 may be disposed near the return air inlet 22 of the exhaust duct 21, and the high efficiency filter 76 may be disposed near the exhaust air outlet 23 of the exhaust duct 21. The second coarse filter 74 and the second intermediate filter 75 have the same functions as those of the first coarse filter 71 and the first intermediate filter 72, and will not be described in detail here.
The high efficiency filter 76 can kill viruses in indoor exhaust air, and the embodiment is to arrange the high efficiency filter 76 at one side of the second heat exchanger 32 close to the air return opening 22. So arranged, viruses in the exhaust air are prevented from adhering to the surface of the second heat exchanger 32.
It will be appreciated that the first purifying unit includes the first coarse filter 71, the first intermediate filter 72 and the sub-efficient filter 73, and the second purifying unit includes the second coarse filter 74, the second intermediate filter 75 and the efficient filter 76 are merely one embodiment, and are not limited to this example.
For example, when the air conditioning system is applied to a cleaning area combined with plague, 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 sub-efficient filtration. In such an environment, the exhaust passage 21 may be arranged with only coarse filters.
When the air conditioning system is applied to semi-polluted areas and polluted areas combined by plague, a coarse filter, a medium filter and a sub-high filter can be arranged in the fresh air channel 11 for three-stage filtration; the air exhaust channel 21 can be internally provided with a coarse filter, a medium filter and a high-efficiency filter to carry out three-stage filtration on indoor air exhaust, and the scheme is a preferred scheme of the embodiment so as to improve the applicability of an air conditioning system and the purification effect of fresh air.
As shown in fig. 4 and 5, in the air conditioning system provided in the embodiment, the first fan wall 50 is disposed in the fresh air channel 11, the first fan wall 50 is provided 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 medium filter 72 to prevent large-diameter particles in the fresh air from adhering to the first fans 51.
Similarly, the exhaust duct 21 is provided with a second fan wall 60, the second fan wall 60 is provided with at least two second fans 61, and the second fan wall 60 is disposed near the exhaust port 23 of the exhaust duct 21, which may be disposed at a side of the second heat exchanger 32 near the exhaust port 23.
In the related art, the fresh air channel 11 and the exhaust channel 21 are respectively provided with a fan, and the fans usually adopt variable frequency fans, which can adjust the frequency according to the pressure difference transmitter of the air supply pipe, so as to ensure the air supply pressure. In actual engineering commissioning the fan frequency is typically run at 40-50Hz with a lower run limit of 25Hz. When the running frequency of the fan is 25Hz, the air supply quantity is reduced to 50%, the requirement that the fresh air quantity is reduced to 3 times/h from 6 times/h can be met, but the air supply pressure is reduced to 25%, and the requirement that the air pressure is too low can not guarantee the basic air supply pressure. Therefore, in the related art, the fresh air channel 11 and the exhaust channel 21 are only provided with one fan, the air quantity adjusting range is narrow, the air supply pressure cannot be ensured, and the requirement of the fresh air quantity in the plague 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 channel 21, so that the air volume adjusting range can be increased according to the working number of the fans selected in different modes, and the air volume requirement in different modes can be satisfied.
Illustratively, 2 or 4 first fans 51 are disposed side by side on the first fan wall 50; similarly, 2 or 4 second fans 61 are disposed side by side on the second fan wall 60. Taking a negative pressure ward as an example, the minimum fresh air quantity is 2 times/h at ordinary times, and the minimum fresh air quantity is 6 times/h under special conditions. Under special conditions, the first fan 51 in the fresh air channel 11 can be fully opened, the second fan 61 in the exhaust channel 21 can be fully opened, and fresh air quantity can be borne by a plurality of fans, so that the condition that the lower limit of the operation of the fans is too low, and the air pressure is small and cannot meet the air supply requirement is avoided. During the parallel operation, part of the first fans 51 can be selected to work, and part of the second fans 61 can be selected to work, so that the normal output of wind pressure and wind quantity 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 disposed near the fresh air outlet 13; namely, the auxiliary heater 81 and the isothermal humidifier 82 are located at the air outlet section of the fresh air channel 11.
Specifically, the auxiliary heater 81 may be disposed between the condensation reheat heat exchanger 43 and the isothermal humidifier 82, where the auxiliary heater 81 is used to further adjust and raise the temperature of the fresh air passing through the condensation reheat heat exchanger 43, so that the temperature of the fresh air delivered into the room meets the requirement. The auxiliary heater 81 may be heated by one or a combination of electric heating, hot water heating, and steam heating.
The isothermal humidifier 82 is used for adjusting the humidity of the dehumidified fresh air, or when the fresh 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, electrothermal humidification, or dry steam humidification.
Further, the air conditioning system provided in the embodiment of the present application further includes a plurality of germicidal lamps 90, where the germicidal lamps 90 may be ultraviolet germicidal lamps, and are used for sterilizing and disinfecting the air flowing into the fresh air channel 11 and the air exhaust channel 21. It is understood that the sterilizing lamps 90 may be arranged in the fresh air channel 11 and the air exhaust channel 21 at intervals to enhance the sterilizing effect.
Thus far, the technical solution of the present invention has 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 protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.
Claims (6)
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 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;
the dehumidifier unit is also included;
the dehumidifier 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 at one side of the first heat exchanger, which is far away from the fresh air inlet of the fresh air channel;
the dehumidifier unit further comprises a condensation reheating heat exchanger, and the condensation reheating heat exchanger is arranged in the fresh air channel;
the condensing reheat heat exchanger is positioned at one side of the throttling device, which is far away from a fresh air inlet of the fresh air channel;
a first branch is arranged between the outlet of the compressor and the outlet of the condenser, and a first regulating valve is arranged on the first branch;
a second branch is arranged between the inlet of the condensation reheating heat exchanger and the inlet of the throttling device, and a bypass valve is arranged on the second branch; and/or 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;
the compressor and the condenser are arranged outside the fresh air channel.
2. The air conditioning system according to claim 1, wherein the fresh air channel is provided with a first purification unit comprising at least one filter;
the exhaust channel is provided with a second purifying unit, and the second purifying unit at least comprises a filter.
3. The air conditioning system of claim 2, wherein the first purification unit comprises a first coarse filter, a first medium-efficiency filter and a sub-high-efficiency filter sequentially arranged in the fresh air channel along an 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;
the second purifying unit comprises a second coarse filter, a second medium-efficiency filter and a high-efficiency filter which are sequentially arranged in the exhaust channel along the air outlet direction;
the second coarse filter is arranged close to the air return opening of the air exhaust channel, and the high-efficiency filter is arranged close to the air exhaust opening of the air exhaust channel.
4. The air conditioning system of claim 3, 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-efficiency filter, and is provided with at least two fans;
the exhaust channel is internally provided with a second fan wall, the second fan wall is close to an exhaust outlet of the exhaust channel, and the second fan wall is provided with at least two fans.
5. The air conditioning system of claim 3, wherein the first heat exchanger is located on a side of the first intermediate filter remote from the fresh air inlet of the fresh air channel;
the second heat exchanger is positioned at one side of the high-efficiency filter away from the air return opening of the air exhaust channel.
6. The air conditioning system of claim 1, further comprising a plurality of germicidal lamps;
the sterilizing lamps are arranged in the fresh air channel and the exhaust channel at intervals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110396861.6A CN113137672B (en) | 2021-04-13 | 2021-04-13 | Air conditioning system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110396861.6A CN113137672B (en) | 2021-04-13 | 2021-04-13 | Air conditioning system |
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| CN113137672B true CN113137672B (en) | 2023-06-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114110821B (en) * | 2021-11-15 | 2024-08-27 | 金国达科技（湖南）有限公司 | Multistage heat recovery fresh air system of central air conditioner |
| 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 |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013131436A1 (en) * | 2012-03-05 | 2013-09-12 | Rong Guohua | Air-conditioning unit with heat recovery |
| CN105276736B (en) * | 2015-11-25 | 2018-05-22 | 南通华信中央空调有限公司 | A kind of heat pump type total heat recovering fresh air air-conditioner set of band condensation reheating |
| 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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