CN119802727B - Fresh air conditioner with multistage heat-humidity exchange function and control method - Google Patents
Fresh air conditioner with multistage heat-humidity exchange function and control methodInfo
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- CN119802727B CN119802727B CN202510208679.1A CN202510208679A CN119802727B CN 119802727 B CN119802727 B CN 119802727B CN 202510208679 A CN202510208679 A CN 202510208679A CN 119802727 B CN119802727 B CN 119802727B
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Abstract
A fresh air conditioner with multistage heat-humidity exchange and a control method thereof relate to the technical field of air conditioners. According to the invention, after the indoor exhaust air and the outdoor fresh air are subjected to total heat exchange through the hot and humid film, the communication state between the compressor and each heat exchanger and the spraying state of the humidifier are controlled, the flow direction of heat and water molecules is controlled efficiently and energy-effectively, and the temperature and humidity control management of the indoor environment is realized under the condition mode switching in different seasons through a multi-stage heat exchange (hot and humid film, three heat exchanger heat pump and condensed water spraying) mode. The compressor forms a condenser by the second heat exchanger and the third heat exchanger through reversing valves, the first heat exchanger forms an evaporator, the humidifier sprays water mist to assist in cooling, the heat-moisture exchange core, the air inlet fan and the air outlet fan are combined to work cooperatively, outdoor fresh air is sent into a room after being dehumidified isothermally, the indoor air outlet effect is achieved, and the working state of the heat exchanger and the spraying condition of the humidifier are changed in the dehumidification refrigeration and heating humidification modes, so that temperature and humidity adjustment is achieved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a fresh air conditioner with multistage heat-humidity exchange and a control method.
Background
With the continuous improvement of the living standard of people, the comfort level requirements for indoor air environment are also increasing. At present, the traditional air conditioner is mainly focused on temperature regulation and lacks an effective humidity regulation function. Although some high-end air conditioners have certain dehumidification capability, simple dehumidification carried out in a refrigeration mode is generally not capable of realizing accurate isothermal dehumidification, and dehumidification effect is poor in a low-temperature high-humidity environment. However, most air conditioners cannot perform the humidification function, and rely on additional humidification equipment, so that a one-stop temperature and humidity adjustment solution cannot be provided for users.
For some simple dehumidifying or humidifying devices on the market, for example, a dehumidifier condenses water vapor in air to be discharged out of the room through a refrigerating principle, so that indoor humidity is reduced, and a humidifier adds water vapor to the air through spraying or other modes to increase humidity. These devices are often independent of air conditioning systems, require additional purchase and placement, not only occupy space, but also require manual intervention during use, such as periodic water addition, cleaning, etc., and are not convenient to use. In addition, the equipment is difficult to consider the accurate control of temperature when adjusting humidity, can not realize the collaborative adjustment of indoor humiture, leads to indoor environmental comfort level still not ideal enough.
In addition, in different seasons, the indoor demand difference to humiture is great. The existing air conditioner can reduce humidity to a certain extent during cooling in summer, but often causes low indoor temperature and uncomfortable feeling of human body, and can not effectively solve the problem of indoor air drying during heating in winter, even aggravate the drying degree, and can not meet the requirements of users on ideal indoor environments in various seasons. If the existing dehumidification or humidification equipment is purchased for use, the dehumidification or humidification equipment and the air conditioner are independent, and therefore extra energy is consumed during operation. For example, in summer requiring simultaneous cooling and dehumidifying, the air conditioner and the dehumidifier are operated separately, which not only increases energy consumption, but also may cause poor indoor temperature and humidity adjustment effect due to incoordination between the devices, further wasting energy.
Disclosure of Invention
The invention aims to provide a multi-stage heat-humidity exchange fresh air conditioner, which provides an air conditioner solution capable of accurately regulating indoor temperature and humidity all the year round, high in comfort level and better in energy utilization efficiency for users.
In order to solve the technical problems, the invention adopts the following technical scheme that the multi-stage heat-humidity exchange fresh air conditioner comprises:
the tail end of the outdoor fresh air inlet channel is provided with an air inlet fan for sending outdoor fresh air into the room;
the tail end of the indoor return air exhaust channel is provided with an exhaust fan for sending the indoor return air out of the room;
The heat-humidity exchange core is connected with the outdoor fresh air inlet channel and the indoor return air exhaust channel so as to carry out heat-humidity exchange on the outdoor fresh air and the indoor return air;
the temperature and humidity adjusting module comprises a first heat exchanger and a second heat exchanger which are arranged in the outdoor fresh air inlet channel and used for sequentially carrying out heat exchange on the outdoor fresh air passing through the heat-humidity exchange core, and also comprises a third heat exchanger which is arranged in the indoor return air exhaust channel and used for carrying out heat exchange on the indoor return air passing through the heat-humidity exchange core;
The humidifying module comprises a first humidifier arranged in the outdoor fresh air inlet channel and used for humidifying the first heat exchanger and the second heat exchanger according to the requirement, and also comprises a second humidifier arranged in the indoor return air exhaust channel and used for humidifying the third heat exchanger according to the requirement;
and the compressor is used for conveying the heat exchange medium to the first heat exchanger, the second heat exchanger and the third heat exchanger.
Preferably, the compressor is connected with the first heat exchanger or the third heat exchanger through a four-way reversing valve, the compressor is connected with the second heat exchanger through a three-way reversing valve, a first expansion valve is connected between the first heat exchanger and the third heat exchanger, and a second expansion valve is connected between the second heat exchanger and the third heat exchanger.
More preferably, the first humidifier and the second humidifier each comprise a set of humidifying mechanism, the humidifying mechanism comprises a water receiving tray arranged below the corresponding heat exchanger and a spray nozzle arranged above the water receiving tray, the spray nozzle is communicated with the water receiving tray through a water suction pipe, the water suction pipe is provided with a Bernoulli valve, one end of the Bernoulli valve is provided with an air pump, the air pump is started to enable air to pass through the Bernoulli valve to generate negative pressure, and therefore the water in the water receiving tray is sucked into the Bernoulli valve through the water suction pipe and is sprayed out through the spray nozzle after being mixed with the air.
More preferably, the water receiving disc is connected with an automatic water supplementing valve, and the automatic water supplementing valve is provided with a normally closed two-way electromagnetic valve for externally connecting purified water to supplement water to the water receiving disc.
More preferably, the bottom of the water receiving disc is provided with a normally open type drainage electric valve, the top of the water receiving disc is also provided with an overflow port, and the inner wall surface of the water receiving disc is also provided with a layer of copper net for resisting bacteria.
More preferably, the first heat exchanger, the second heat exchanger and the third heat exchanger are all arranged in an inclined mode along the height direction so as to increase the contact area of the heat exchange windward side and the water mist sprayed by the spray nozzle.
More preferably, the inlet of the outdoor fresh air inlet channel and the inlet of the indoor return air exhaust channel are both provided with filter cotton.
More preferably, the indoor air conditioner further comprises a box body, the outdoor fresh air inlet channel and the indoor return air exhaust channel are arranged in the box body independently, the inlet of the outdoor fresh air inlet channel is positioned at the rear part of the right end of the box body, the outlet of the outdoor fresh air inlet channel is positioned at the front part of the left end of the box body, the inlet of the indoor return air exhaust channel is positioned at the front part of the right end of the box body, the outlet of the indoor return air exhaust channel is positioned at the rear part of the left end of the box body, and the front part and the rear part of the box body are installed near the indoor side and the outdoor side.
In addition, the invention also provides a multi-stage heat-humidity exchange fresh air conditioner multi-connected system, which comprises a plurality of the boxes and a compressor, wherein the inlet of the outdoor fresh air inlet channel and the outlet of the indoor return air outlet channel of each box are communicated with outdoor air through independent pipelines, and the heat exchangers in the boxes are connected with the compressor in a parallel mode.
In addition, the invention also provides a control method of the multi-stage heat-humidity exchange fresh air conditioner, which implements the following working condition modes through control instructions:
The isothermal dehumidification mode comprises the steps that the compressor is communicated with the second heat exchanger and the third heat exchanger to enable the second heat exchanger and the third heat exchanger to form condensers, then media in the condensers are enabled to enter the first heat exchanger through the expansion valve to enable the first heat exchanger to form evaporators, the second humidifier is opened to spray water mist to the third heat exchanger, the air inlet fan and the air exhaust fan are opened, outdoor fresh air enters the outdoor fresh air inlet channel, indoor return air enters the indoor return air exhaust channel and then passes through the heat-humidity exchange core to conduct heat-humidity exchange, then the outdoor fresh air firstly passes through the evaporators formed by the first heat exchanger to reduce the temperature and dehumidify, then passes through the condensers formed by the second heat exchanger to increase the temperature and finally is fed into a room to achieve isothermal dehumidification fresh air supply, meanwhile, the indoor return air passes through the condensers formed by the third heat exchanger to enable the media in the condensers to reduce the temperature, and then the outdoor fresh air is discharged in a high-temperature high-humidity air mode, and the second humidifier provides auxiliary cooling and depressurization for the media in the third heat exchanger to reduce the compressor energy consumption.
The second humidifier is opened to spray water mist to the third heat exchanger, the air inlet fan and the air exhaust fan are opened, outdoor fresh air enters an outdoor fresh air inlet channel, indoor return air enters an indoor return air exhaust channel and then is subjected to heat-moisture exchange through a heat-moisture exchange core, then the outdoor fresh air firstly passes through the evaporator formed by the first heat exchanger and the second heat exchanger to reduce the temperature and dehumidify, and then is fed into an indoor room to realize dehumidification and refrigeration fresh air supply, meanwhile, the indoor return air passes through the condenser formed by the third heat exchanger to reduce the temperature of the medium in the condenser, and is discharged out of the room in a high-temperature and high-humidity air mode, and the second humidifier sprays water to the third heat exchanger to provide auxiliary cooling and depressurization for the medium in the third heat exchanger so as to reduce the energy consumption of the compressor.
The humidifying and heating mode includes that the compressor is communicated with the first heat exchanger and the second heat exchanger to enable the first heat exchanger and the second heat exchanger to form a condenser, then media in the condenser enter the third heat exchanger through the expansion valve to enable the third heat exchanger to form an evaporator, the first humidifier is opened to spray water mist on the first heat exchanger and the second heat exchanger, the air inlet fan and the air exhaust fan are opened, outdoor fresh air enters the outdoor fresh air inlet channel, indoor return air enters the indoor return air exhaust channel and then is subjected to heat-humidity exchange through the heat-humidity exchange core, then the outdoor fresh air firstly passes through the condenser formed by the first heat exchanger and the second heat exchanger to raise the temperature, is humidified under the effect of the water mist sprayed by the first humidifier and then is fed into a room to realize humidifying and heating fresh air supply, meanwhile, the indoor return air passes through the evaporator formed by the third heat exchanger to exchange and refrigerate, and is discharged out of the room in a low-temperature dry air mode.
Compared with the prior art, the invention has the beneficial effects that:
1. Through the indoor humiture of sensor real-time supervision to combine preset target parameter, automatic control compressor, fan's operating frequency, a plurality of heat exchangers in the temperature and humidity adjustment module and humidification module's cooperation is used, can carry out accurate heat exchange and humidification respectively to outdoor new trend and indoor return air and handle, and high-efficient, energy-conserving ground control heat and hydrone flow direction can realize multistage heat transfer (heat wet exchange core, heat exchanger, comdenstion water spray) mode, has satisfied the accurate regulation demand of humiture under different seasons and the different environment. Isothermal dehumidification can be realized in spring and autumn, dehumidification refrigeration can be realized in summer, humidification and heating can be realized in winter, a comfortable and stable temperature and humidity environment is provided for the indoor environment, continuous updating of indoor air is guaranteed, indoor dirty air is effectively discharged, outdoor fresh air is introduced, indoor air quality is improved, and living and working comfort of people is improved.
2. Through setting up the heat and humidity exchange core, outdoor fresh air carries out heat and humidity exchange with indoor return air, effectively retrieves cold volume or heat and steam in the indoor return air, has reduced the dependence to external energy, has improved energy utilization efficiency, and only need two low energy consumption fans to operate and provide power for the air current, effectively reduced the whole operation energy consumption of air conditioner, realized energy-concerving and environment-protective effect, in addition, accessible humidifier provides supplementary cooling for the medium in the condenser in isothermal dehumidification mode and dehumidification refrigeration mode, thereby can let the compressor step down, improve its ability and energy efficiency.
Drawings
FIG. 1 is a schematic view of the overall structure in an embodiment;
Fig. 2 is a schematic structural diagram of a first humidifier according to an embodiment;
FIG. 3 is a schematic diagram of a medium temperature dehumidification mode according to an embodiment;
FIG. 4 is a schematic diagram of a dehumidification cooling mode in an embodiment;
FIG. 5 is a schematic diagram of a heating and humidifying mode in the embodiment;
FIG. 6 is a schematic diagram of a multi-stage heat and humidity exchange fresh air conditioner multi-connected system in an embodiment;
FIG. 7 is a diagram of the humidity of the humid air conditioner process in summer and winter according to an example;
fig. 8 is an enthalpy-humidity diagram of the isothermal dehumidification process of the air conditioner in spring in the example.
In the figure:
1. The device comprises an outdoor fresh air inlet channel, an indoor return air exhaust channel, an air inlet fan, an air exhaust fan, a heat-moisture exchange core, a first heat exchanger, a second heat exchanger, an 8 heat exchanger, a third heat exchanger, a9 heat exchanger, a compressor, a 10 four-way reversing valve, an 11 three-way reversing valve, a 12 first expansion valve, a 13 second expansion valve, a 14 water receiving disc, a 15 spray nozzle, a 16 water suction pipe, a 17 Bernoulli valve, a 18 air pump, a 19 automatic water supplementing valve, a 20 normally open type drainage electric valve, a 21, an overflow port, a 22, filter cotton, a 23, a box body, a 24 normally closed two-way electromagnetic valve.
Detailed Description
The invention will be further described with reference to examples and drawings, to which reference is made, but which are not intended to limit the scope of the invention.
It should be noted that, in the present invention, unless explicitly stated and limited otherwise, terms such as "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, in the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" on a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact through additional features therebetween.
As shown in fig. 1, a multi-stage heat-moisture exchange fresh air conditioner includes:
the tail end of the outdoor fresh air inlet channel 1 is provided with an air inlet fan 3 for sending outdoor fresh air into the room.
The tail end of the indoor return air exhaust channel 2 is provided with an exhaust fan 4 for sending the indoor return air out of the room.
And the heat-humidity exchange core 5 is connected with the outdoor fresh air inlet channel 1 and the indoor return air outlet channel 2 so as to carry out heat-humidity exchange on the outdoor fresh air and the indoor return air.
The temperature and humidity adjusting module comprises a first heat exchanger 6 and a second heat exchanger 7 which are arranged in the outdoor fresh air inlet channel 1 and used for sequentially carrying out heat exchange on outdoor fresh air passing through the heat-humidity exchange core 5, and also comprises a third heat exchanger 8 which is arranged in the indoor return air exhaust channel 2 and used for carrying out heat exchange on indoor return air passing through the heat-humidity exchange core 5.
The humidifying module comprises a first humidifier arranged in the outdoor fresh air inlet channel 1 and used for humidifying the first heat exchanger 6 and the second heat exchanger 7 according to the requirement, and also comprises a second humidifier arranged in the indoor return air exhaust channel 2 and used for humidifying the third heat exchanger 8 according to the requirement.
A compressor 9 for feeding the heat exchange medium to the first heat exchanger 6, the second heat exchanger 7 and the third heat exchanger 8. In addition, the indoor temperature and humidity can be monitored through the sensor, and the working frequencies of the compressor and the fan can be automatically controlled by combining with preset target parameters, so that the intelligent control effect of the equipment is improved.
In the above structure, the compressor 9 is connected to the first heat exchanger 6 or the third heat exchanger 8 through the four-way reversing valve 10, the compressor 9 is connected to the second heat exchanger 7 through the three-way reversing valve 11, the first expansion valve 12 is connected between the first heat exchanger 6 and the third heat exchanger 8, and the second expansion valve 13 is connected between the second heat exchanger 7 and the third heat exchanger 8.
The first humidifier and the second humidifier in this embodiment each include a set of humidification mechanism, taking the humidification mechanism of the first humidifier as an example, as shown in fig. 2, the humidification mechanism includes a water receiving tray 14 disposed below the corresponding heat exchanger and a spray nozzle 15 disposed above the water receiving tray 14, the spray nozzle 15 is communicated with the water receiving tray 14 through a water suction pipe 16, a bernoulli valve 17 is mounted on the water suction pipe 16, an air pump 18 is disposed at one end of the bernoulli valve 17, and air can be caused to pass through the bernoulli valve 17 by activating the air pump 18 to generate negative pressure, so that the water in the water receiving tray 14 is sucked into the bernoulli valve 17 by the water suction pipe 16 and is sprayed out through the spray nozzle 15 after being mixed with air. By utilizing the principle that the Bernoulli valve 17 generates negative pressure, water is sucked by the power provided by the air pump 18 and mixed with air to be sprayed out, compared with the traditional humidifying mode, such as electrode humidification and the like, the energy consumption is lower, the energy consumption in the air conditioner operation process is reduced, a good energy-saving effect is achieved, and the water in the water suction pipe 16 is mixed with the air in advance, so that water mist sprayed out of the spray nozzle 15 can be more dispersed, and the heat conductivity is improved.
In the isothermal dehumidification mode and the dehumidification refrigeration mode, the humidifier can also provide auxiliary cooling for the medium in the condenser, so that the compressor can be depressurized, and the capacity and energy efficiency of the compressor can be improved. This is because the specific heat capacity of water is large and more heat can be absorbed. Spraying water mist on the surface of the condenser can absorb part of heat released in the condensation process of the refrigerant to evaporate, so that the heat dissipation effect of the condenser is enhanced. Then the heat dissipation effect of the condenser is improved, the temperature of the condensed refrigerant liquid is reduced, and the condensing pressure is correspondingly reduced. According to the principle of the refrigeration cycle, the discharge pressure of the compressor is equal to the condensing pressure, and when the condensing pressure is reduced, the discharge pressure of the compressor is also reduced. After the discharge pressure of the compressor is reduced, the compression ratio of the compressor is also reduced. The compression ratio is the ratio of the discharge pressure to the suction pressure of the compressor, and a decrease in the compression ratio means that the work required by the compressor in compressing the refrigerant vapor is reduced. This is advantageous to increase the capacity of the compressor, as the compressor can compress more refrigerant vapor at the same power. Meanwhile, since the power consumption of the compressor is reduced and the refrigerating capacity is increased due to the increase of the circulation amount of the refrigerant, the energy efficiency ratio is improved.
Further, the water receiving tray 14 is connected with an automatic water supplementing valve 19, and the automatic water supplementing valve 19 is provided with a normally closed two-way electromagnetic valve 24 for externally connecting purified water to supplement water to the water receiving tray 14. The bottom of the water receiving disc 14 is provided with a normally open type drainage electric valve 20, the top of the water receiving disc 14 is also provided with an overflow port 21, and the inner wall surface of the water receiving disc 14 is also provided with a layer of copper net for antibiosis.
In this embodiment, the first heat exchanger 6, the second heat exchanger 7 and the third heat exchanger 8 are all disposed in an inclined manner along the height direction, so as to increase the contact area of the heat exchange windward side and the water mist sprayed by the spray nozzle 15.
In consideration of the quality of the introduced fresh air and the service life of the equipment, filter cotton 22 is arranged at the inlet of the outdoor fresh air inlet channel 1 and the inlet of the indoor return air exhaust channel 2. The filter cotton 22 can perform preliminary filtration on the air entering the air conditioning system, intercept dust, pollen, hair and other impurities in the air, prevent the impurities from entering the air conditioner, avoid polluting and blocking subsequent heat and humidity exchange, humidification and other components, and ensure the normal operation and the service life of the air conditioning system. Then, through filtering out harmful impurity in the air, the fresh air that gets into indoor and circulated return air are cleaner, help improving indoor air quality, provide a healthier, comfortable life and operational environment for the user, especially to the crowd of allergic constitution or the place that the air quality requirement is higher, have important meaning.
When the multistage heat-humidity exchange fresh air conditioner is applied and installed, a box body 23 can be arranged, the outdoor fresh air inlet channel 1 and the indoor return air exhaust channel 2 are arranged in the box body 23 independently, the inlet of the outdoor fresh air inlet channel 1 is positioned at the rear part of the right end of the box body 23, the outlet of the outdoor fresh air inlet channel 1 is positioned at the front part of the left end of the box body 23, the inlet of the indoor return air exhaust channel 2 is positioned at the front part of the right end of the box body 23, the outlet of the indoor return air exhaust channel 2 is positioned at the rear part of the left end of the box body 23, and the front part and the rear part of the box body 23 are installed near the indoor side and the outdoor side. The air conditioner has the advantages that the whole structure is more compact, fresh air and return air can be processed in a limited space, the space utilization rate is improved, the air conditioner is convenient to install in different places, and the air conditioner is particularly suitable for indoor environments with limited spaces. Meanwhile, the installation and the later maintenance work of the air conditioner are facilitated, and maintenance personnel can overhaul and maintain indoor parts of the air conditioner on one indoor side.
In addition, the multi-stage heat-humidity exchange fresh air conditioner provided in this embodiment may be disposed in multiple rooms or areas in a room in parallel to form a multi-unit system of a wet fresh air conditioner, as shown in fig. 6, the system specifically includes multiple boxes 23 and a compressor 9, the inlet of the outdoor fresh air intake channel 1 and the outlet of the indoor return air exhaust channel 2 of each box 23 are all communicated with the outdoor air through separate pipelines, and the heat exchangers inside the boxes 23 are connected with the compressor 9 in parallel. The whole system is only provided with one compressor 9, so that the number and energy consumption of the compressors are greatly reduced, the running cost of the whole system is reduced, the energy utilization efficiency is improved, the energy-saving running is realized, and the requirements of modern environmental protection and energy saving are met.
Because the compressor 9 can be arranged indoors and the compressor is not required to be arranged for each room or region, the problem of large occupation area of an external machine in the traditional multi-connected air conditioning system is avoided, the layout of the whole air conditioning system is more compact, indoor and outdoor spaces are saved, the air conditioning system is particularly suitable for building environments with limited space, and the space utilization rate is improved. Furthermore, the inlet of the outdoor fresh air inlet channel 1 of each box 23 and the outlet of the indoor return air exhaust channel 2 are communicated with outdoor air through independent pipelines, the corresponding air port of each box is only required to be connected with the outdoor air during installation, and meanwhile, the heat exchanger inside the box is connected with the compressor 9 in parallel, so that the installation process is relatively simple, the installation difficulty and the installation cost are reduced, and the installation efficiency is improved.
It is further worth mentioning that the plurality of boxes 23 share one compressor 9, so that possible fault points caused by the simultaneous operation of the plurality of compressors 9 are reduced, and the reliability of the system is improved. Meanwhile, the compressor 9 is arranged indoors, so that the problems of wind blowing, sun drying, rain spraying and the like which are faced by the operation of the external machine of the traditional air conditioning system in an outdoor severe environment are avoided, the service life of the compressor 9 is further prolonged, the maintenance cost and the failure rate of the system are reduced, and the stable operation of the whole multi-connected system of the wet fresh air conditioner is ensured. The outdoor unit structure in the traditional air conditioning system is not provided, so that the appearance of the building is tidier and more attractive, the integral aesthetic feeling of the building cannot be damaged due to the installation of the outdoor unit, the requirements of modern building on appearance design are met, and the outdoor unit structure is particularly suitable for places such as commercial buildings and residential communities with higher requirements on the appearance of the building.
Taking the seasonal environment of the Heyang city of Hunan province as an example, the control method of the multi-stage heat-humidity exchange fresh air conditioner provided by the embodiment mainly implements the following working condition modes through control instructions:
In the spring isothermal dehumidification mode, as shown in fig. 3, a compressor 9 is communicated with a second heat exchanger 7 through a three-way reversing valve 11 and is communicated with a third heat exchanger 8 through a four-way reversing valve 10, so that the second heat exchanger 7 and the third heat exchanger 8 form condensers, media in the second heat exchanger 7 (condenser) enter the tail end of a pipeline of the third heat exchanger 8 (condenser) through a second expansion valve 13 and then enter the first heat exchanger 6 through a first expansion valve 12 together, so that the first heat exchanger 6 forms an evaporator, a second humidifier is opened to spray water mist to the third heat exchanger 8 (condenser), an air inlet fan 3 and an air exhaust fan 4 are opened, outdoor fresh air enters the outdoor fresh air inlet channel 1, indoor return air enters the indoor return air exhaust channel 2 and then passes through a hot and humid heat exchange core 5 to reduce the humidity of the outdoor fresh air, the outdoor fresh air passes through the evaporator formed by the first heat exchanger 6 to reduce the temperature and further dehumidify, then passes through the condenser formed by the second heat exchanger 7 to raise the temperature, finally the indoor isothermal dehumidification is realized, the first humidifier 6 passes through the evaporator 6 and finally passes through the four-way reversing valve 10 to the evaporator 6 to reduce the temperature of the indoor fresh air, and the temperature of the outdoor fresh air is cooled by the indoor fresh air, and the compressed air is discharged to the indoor fresh air is cooled by the air through the third heat exchanger 8, and the air is cooled by the air in the form the air, and the indoor fresh air is cooled by the indoor fresh air, and the indoor fresh air is cooled by the air cooled air and the air. The energy efficiency in this mode is specifically as follows, the total power of the compressor 9 and the air pump 18 of the second humidifier is 0.70KW, wherein:
cop =(h Feeding the articles -h Feeding in )×350×1.2/3600/0.7
=(65-37.1)×350×1.2/3600/0.7=4.65。
in a dehumidification and refrigeration mode in summer, as shown in fig. 4, a compressor 9 is communicated with a third heat exchanger 8 through a four-way reversing valve 10, so that the third heat exchanger 8 forms a condenser, media in the condenser are respectively fed into a first heat exchanger 6 and a second heat exchanger 7 through a first expansion valve 12 and a second expansion valve 13, so that the first heat exchanger 6 and the second heat exchanger 7 form an evaporator, a second humidifier is opened to spray mist on the third heat exchanger 8 (condenser), an air inlet fan 3 and an air exhaust fan 4 are opened, outdoor fresh air enters an outdoor fresh air inlet channel 1, indoor return air enters an indoor return air exhaust channel 2, then heat and humidity exchange is carried out through a heat and humidity exchange core 5, the humidity of the outdoor fresh air is reduced, the outdoor fresh air is then fed into a dehumidifier formed by the first heat exchanger 6 and the second heat exchanger 7 to reduce the temperature and dehumidify, the indoor fresh air is fed into a room to realize refrigeration fresh air supply, and the media in the first heat exchanger 6 (evaporator) are returned into the compressor 9 through the four-way reversing valve 10, and the media in the second heat exchanger 7 (evaporator) are returned into the compressor 9 through the three-way reversing valve 11; meanwhile, indoor return air passes through a condenser formed by the third heat exchanger 8 to reduce the temperature of a medium in the condenser, and is discharged out of the room in a high-temperature high-humidity air mode, and the second humidifier sprays water mist to the third heat exchanger 8 in the process to provide auxiliary cooling and depressurization for the medium in the third heat exchanger 8 so as to reduce the energy consumption of the compressor 9. The energy efficiency in this mode is specifically as follows, the total power of the compressor 9 and the air pump 18 of the second humidifier is 0.76KW, wherein:
eer =(h Feeding in -h Feeding the articles )×350×12/3600/0.76
=(107.1-38.5)×350×1.2/3600/0.76=10.53。
In the winter humidification heating mode, as shown in fig. 5, a compressor is communicated with a first heat exchanger 6 through a four-way reversing valve 10 and is communicated with a second heat exchanger 7 through a three-way reversing valve 11, so that the first heat exchanger 6 and the second heat exchanger 7 form condensers, then media in the first heat exchanger 6 (condenser) and media in the second heat exchanger 7 (condenser) enter a third heat exchanger 8 through a first expansion valve 12 and a second expansion valve 13 respectively, so that the third heat exchanger 8 forms an evaporator, the first humidifier is opened to spray water mist to the first heat exchanger 6 (condenser) and the second heat exchanger 7 (condenser), an air inlet fan 3 and an air exhaust fan 4 are opened, outdoor fresh air enters an outdoor fresh air inlet channel 1, indoor return air enters an indoor return air exhaust channel 2 and is subjected to heat-moisture exchange through a heat-moisture exchange core 5, the humidity of the outdoor fresh air is increased, then the outdoor fresh air firstly passes through the condensers formed by the first heat exchanger 6 (condenser) and the second heat exchanger 7 (condenser) to raise the temperature, and then passes through the four-way reversing valve 9 to realize the effect of the first humidifier to spray water mist to the first heat exchanger 6 (condenser) and the second heat exchanger 7, and then passes through the three heat exchangers to realize the evaporator to be discharged into the indoor air conditioner, and the air is cooled by the air in the form a low-return air temperature, and the air is discharged into the indoor air through the four-way heat exchanger 8, and the air conditioner is simultaneously cooled down through the evaporator, and the air is cooled down through the evaporator. The energy efficiency in this mode is specifically as follows, the total power of the compressor 9 and the air pump 18 of the second humidifier is 0.76KW, wherein:
cop=(h Feeding the articles -h Feeding in )×350×1.2/3600/0.76
=(57.5-2.7)×350×1.2/3600/0.76=8.41。
The multistage heat-humidity exchange fresh air conditioner disclosed by the invention is characterized in that indoor exhaust air and outdoor fresh air are subjected to total heat exchange through the heat-humidity membrane in the heat-humidity exchange core, then the communication state between the compressor and each heat exchanger and the spraying state of the humidifier are controlled, the heat and water molecule flowing directions are efficiently and energy-effectively controlled, and the temperature and humidity control management of the indoor environment is realized under the condition mode switching in different seasons in a multistage heat exchange (heat-humidity membrane, three heat exchanger heat pump and condensate water spraying) mode. In the isothermal dehumidification mode in spring and autumn, the compressor enables the second heat exchanger and the third heat exchanger to form a condenser through the reversing valve, the first heat exchanger forms an evaporator, the humidifier sprays water mist to assist in cooling, the heat-humidity exchange core, the air inlet fan and the air exhaust fan are combined to work cooperatively, outdoor fresh air is dehumidified and then sent into a room, the indoor air exhaust effect is achieved, the working state of the heat exchangers and the spraying condition of the humidifier are changed in the dehumidification refrigeration mode in summer and the humidification heating mode in winter, the corresponding temperature and humidity adjusting function is achieved, and the requirements of indoor environments in different seasons are met.
On the other hand, through reasonably controlling the cooperative work of each part, the energy utilization efficiency is optimized, the energy consumption of the compressor is reduced, the energy-saving operation is realized, meanwhile, the system structure is compact, the installation and the maintenance are convenient, the external machine structure of the traditional air conditioner is not needed, the stability and the reliability of the system are further improved, and the air conditioner has good market application prospect and popularization value.
In order to make it easier for a person skilled in the art to understand the improvements of the present invention with respect to the prior art, some of the figures and descriptions of the present invention have been simplified, and the above-described embodiments are preferred implementations of the present invention, but in addition, the present invention may be implemented in other ways, and any obvious substitution is within the scope of protection of the present invention without departing from the concept of the present technical solution.
Claims (8)
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