CN112032883A - Fresh air conditioning system driven by condensation waste heat and operation method thereof - Google Patents
Fresh air conditioning system driven by condensation waste heat and operation method thereof Download PDFInfo
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- CN112032883A CN112032883A CN202010817286.8A CN202010817286A CN112032883A CN 112032883 A CN112032883 A CN 112032883A CN 202010817286 A CN202010817286 A CN 202010817286A CN 112032883 A CN112032883 A CN 112032883A
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- 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
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Abstract
The invention discloses a fresh air conditioning system driven by condensation waste heat and an operation method thereof, and relates to the technical field of fresh air conditioning systems. According to the invention, the solid adsorption material is adopted to remove the moisture load in the fresh air, and the total heat recoverer is utilized to pre-adjust the fresh air, so that the dehumidification efficiency is improved, the heat loss is reduced, and the energy consumption is reduced to a certain extent.
Description
Technical Field
The invention relates to the technical field of fresh air conditioning systems, in particular to a fresh air conditioning system driven by condensation waste heat and an operation method thereof.
Background
Due to the rapid growth of the population and economy in developing countries, the global primary energy demand is expected to increase by 48% from 2012 to 2040. In order to further meet the comfort requirement of indoor environment, the building energy consumption requirement will be increased by 34 percent in the future. The vast southern areas of China are in a high-temperature and high-humidity state in summer, the demand on a dehumidification air-conditioning system is high, and the total energy consumption of the air conditioner is high. The excessive air temperature and moisture content are not only harmful to the health of people, but also promote the breeding of harmful organisms such as fungi, viruses, dust mites and the like and the diffusion of chemical pollutants. In order to ensure the air quality of the building air conditioning system, a fresh air system becomes an indispensable part. In the industrial fields, such as tobacco, textile, electronic, metallurgical, military and the like, there are also corresponding requirements for the moisture content of air. Therefore, the temperature and humidity of the air must be lowered into the comfort zone to achieve comfortable living conditions and necessary production conditions. The energy consumption of the existing air conditioner in the cooling and dehumidifying process accounts for about 50% of the total energy consumption of the building, and to a certain extent, the proportion of fresh air volume is in direct proportion to the indoor air quality and the energy consumption of the fresh air conditioner. If the dehumidification efficiency is ensured and the air supply temperature is properly increased, the energy consumption of the air conditioner can be reduced, the performance of the air conditioner is improved, and the air supply comfort is improved.
At present, the traditional heat pump fresh air conditioning system dehumidifies air by a condensation and dehumidification mode. In this system, there is a strong coupling relationship between temperature and humidity. The new trend is cooled down in cooling coil and is dehumidified and form dry cold air, and the system heats dry cold air for supply air satisfies hot comfortable condition. Since the cooling coil must handle both latent and sensible heat loads, the process is inefficient, resulting in heat loss.
Therefore, those skilled in the art have endeavored to provide a fresh air conditioning system driven by waste heat of condensation and a method for operating the same, which solve the problem that the cooling coil must deal with both latent heat load and sensible heat load in the existing heat pump air conditioning system, and improve the process efficiency and reduce the heat loss.
Disclosure of Invention
In view of the defects in the prior art, the technical problem to be solved by the invention is how to provide a fresh air conditioning system which can improve the process efficiency and reduce the heat loss.
In order to achieve the purpose, the invention provides a fresh air conditioning system driven by condensation waste heat, which comprises a first dehumidification heat exchanger, a second dehumidification heat exchanger, a condenser, a first four-way air valve, a second four-way air valve, a total heat recoverer, an air return valve, a first fan, a second fan, a third fan, a refrigerant circulating module and a cooling water circulating module, wherein the first dehumidification heat exchanger is connected with the first dehumidification heat exchanger;
the outlet of the third fan is divided into two branches, the first branch is connected with the air return valve, and the second branch is connected with the first port of the total heat recoverer; the second port of the total heat recoverer is connected with the first port of the first four-way air valve after being converged with the downstream of the return air valve; the second port of the first four-way air valve is connected with the first inlet of the first dehumidification heat exchanger, and the first outlet of the first dehumidification heat exchanger is connected with the second port of the second four-way air valve; the third port of the first four-way air valve is connected with the first inlet of the second dehumidification heat exchanger, and the first outlet of the second dehumidification heat exchanger is connected with the third port of the second four-way air valve; the fourth port of the second four-way air valve is connected with the inlet of the second fan;
a first outlet of the condenser is connected with a fourth port of the first four-way air valve;
the first port of the second four-way air valve is connected with the inlet of the first fan;
the refrigerant circulation module is connected with a second inlet and a second outlet of the condenser;
and the cooling water circulation module is connected with the first dehumidifying heat exchanger, and a second inlet and a second outlet of the second dehumidifying heat exchanger.
Further, the refrigerant circulation module includes a refrigerant circulation line, a compressor, an expansion valve, and an evaporator.
Further, the cooling water circulation module comprises a cooling water circulation pipeline, a first three-way valve, a second three-way valve and a water pump, and the cooling water circulation module is connected with the first inlet and the first outlet of the evaporator through the cooling water circulation pipeline.
Further, the surfaces of the first dehumidification heat exchanger and the second dehumidification heat exchanger are coated with a solid adsorption material.
Preferably, the solid adsorption material is attached to the surfaces of the first dehumidification heat exchanger and the second dehumidification heat exchanger by using a metal surface desiccant coating technology.
Further, the opening degree of the return valve is 0-100%.
The invention provides an operation method of a fresh air conditioning system driven by condensation waste heat, which comprises a first working mode and a second working mode, wherein the working modes are switched by adjusting a first three-way valve, a second three-way valve, a first four-way air valve and a second four-way air valve.
Further, the first operation mode includes the following processes:
a. the circulating medium of the refrigerant circulating pipeline flows through the compressor, the condenser, the expansion valve and the evaporator and then flows back to the compressor to form a flowing circulating loop;
b. the cooling water circulation pipeline is communicated with the evaporator, the water pump, the first three-way valve, the second dehumidification heater and the second three-way valve; the circulating medium of the cooling water circulating pipeline flows through the evaporator, the water pump, the first three-way valve, the second dehumidification heat exchanger and the second three-way valve and then flows back to the evaporator to form a closed loop;
c. fresh air sequentially flows through the total heat recoverer, the first four-way air valve, the second dehumidification heat exchanger, the second four-way air valve and the second fan under the action of the second fan, and is finally sent into a room;
d. the hot air sequentially flows through the condenser, the first four-way air valve, the first dehumidification heat exchanger, the second four-way air valve and the first fan under the action of the first fan, and is finally discharged into the atmosphere;
e. and indoor air flows through the air return valve or the total heat recoverer under the action of the third fan.
Further, the second operation mode includes the following processes:
a. the circulating medium of the refrigerant circulating pipeline flows through the compressor, the condenser, the expansion valve and the evaporator and then flows back to the compressor to form a flowing circulating loop;
b. the cooling water circulation pipeline is communicated with the evaporator, the water pump, the first three-way valve, the first dehumidification heater and the second three-way valve; the circulating medium of the cooling water circulating pipeline flows through the evaporator, the water pump, the first three-way valve, the first dehumidification heat exchanger and the second three-way valve and then flows back to the evaporator to form a closed loop;
c. fresh air sequentially flows through the total heat recoverer, the first four-way air valve, the first dehumidification heat exchanger, the second four-way air valve and the second fan under the action of the second fan, and is finally sent into a room;
d. the hot air sequentially flows through the condenser, the first four-way air valve, the second dehumidification heat exchanger, the second four-way air valve and the first fan under the action of the first fan, and is finally discharged into the atmosphere;
e. and indoor air flows through the air return valve or the total heat recoverer under the action of the third fan.
Further, in the first operation mode and the second operation mode, the first four-way air valve and the second four-way air valve are adjusted to realize heating and humidification to the indoor space.
The invention has at least the following beneficial technical effects:
1. according to the fresh air conditioning system driven by the condensation waste heat, the temperature of fresh air does not need to be reduced to a very low temperature, and compared with the traditional heat pump fresh air conditioning system, the evaporation temperature can be increased, so that the energy efficiency of the system is improved, and the energy consumption is reduced.
2. According to the fresh air conditioning system driven by the condensation waste heat, the dehumidification heat exchanger performs dehumidification through adsorption of the solid desiccant, no condensed water exists on the surface of the heat exchanger, and the bacterial breeding can be effectively inhibited.
3. According to the fresh air conditioning system driven by the condensation waste heat, the cooling water can overcome the unfavorable adsorption heat generated in the adsorption process of the drying agent, so that the higher dehumidification efficiency is kept, and the efficient dehumidification is realized.
4. According to the fresh air conditioning system driven by the condensation waste heat, the solid adsorption material is attached to the surface of the dehumidification heat exchanger, and a metal surface drying agent coating technology is adopted.
5. According to the fresh air conditioning system driven by the condensed waste heat, the fresh air ratio is adjusted by the air return valve, and the fresh air is pre-adjusted by the total heat recoverer, so that the energy consumption of the system is reduced to a certain extent.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic flow chart of a first mode of operation of a preferred embodiment of the present invention;
fig. 2 is a flow chart illustrating a second operation mode according to a preferred embodiment of the present invention.
The system comprises a first dehumidification heat exchanger, a second dehumidification heat exchanger, an evaporator, a 4-compressor, a condenser, a 6-expansion valve, a 7-water pump, a 8-first three-way valve, a 9-second three-way valve, a 10-first four-way air valve, a 11-second four-way air valve, a 12-total heat recoverer, a 13-return air valve, a 14-first fan, a 15-second fan, a 16-third fan, a 17-refrigerant circulation pipeline and a 18-cooling water circulation pipeline.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
Fig. 1 shows a fresh air conditioning system driven by condensed waste heat according to a preferred embodiment of the present invention, which includes a first dehumidifying heat exchanger 1, a second dehumidifying heat exchanger 2, a condenser 5, a first four-way air valve 10, a second four-way air valve 11, a total heat recoverer 12, an air return valve 13, a first fan 14, a second fan 15, a third fan 16, a refrigerant circulation module, and a cooling water circulation module.
The refrigerant circulating module comprises a refrigerant circulating pipeline 17, an evaporator 3, a compressor 4 and an expansion valve 6; the cooling water circulation module includes a cooling water circulation line 18, a water pump 7, a first three-way valve 8, and a second three-way valve 9.
The outlet of the third fan 16 is divided into two branches, the first branch is connected with the return air valve 13, and the second branch is connected with the first port of the total heat recoverer 12; the second port of the total heat recoverer 12 is connected with the first port of the first four-way air valve 10 after being converged with the downstream of the return air valve 13; a second port of the first four-way air valve 10 is connected with a first inlet of the first dehumidification heat exchanger 1, and a first outlet of the first dehumidification heat exchanger 1 is connected with a second port of the second four-way air valve 11; a third port of the first four-way air valve 10 is connected with a first inlet of the second dehumidification heat exchanger 2, and a first outlet of the second dehumidification heat exchanger 2 is connected with a third port of the second four-way air valve 11; and the fourth port of the second four-way air valve 11 is connected with the inlet of the second fan 15.
A first outlet of the condenser 5 is connected with a fourth port of the first four-way air valve 10; the first port of the second four-way air valve 11 is connected with the inlet of the first fan 14.
A refrigerant circulation line 17 is connected to a second inlet and a second outlet of the condenser 5, and the evaporator 3, the compressor 4, the condenser 5, and the expansion valve 6 are connected to the refrigerant circulation line 17 in this order.
The cooling water circulation pipeline 18 is connected with the second inlets and the second outlets of the first dehumidifying heat exchanger 1 and the second dehumidifying heat exchanger 2, the cooling water circulation pipeline 18 is further connected with the first inlet and the first outlet of the evaporator 3, and the cooling water circulation pipeline 18 is further connected with the water pump 7, the first three-way valve 8 and the second three-way valve 9.
The surfaces of the first and second dehumidifying heat exchangers 1 and 2 are coated with a solid adsorbing material, and preferably, the surfaces of the first and second dehumidifying heat exchangers 1 and 2 are attached by a metal surface desiccant coating technology.
By adjusting the first three-way valve 8 and the second three-way valve 9, the flow direction of the cooling water in the cooling water circulation line 18 can be changed; the fresh air flow direction and the hot air flow direction can be changed by adjusting the first four-way air valve 10 and the second four-way air valve 11.
The hot air enters the first four-way air valve 10 through the condenser 5, exchanges heat with the first dehumidifying heat exchanger 1 or the second dehumidifying heat exchanger 2, passes through the second four-way air valve 11, and is discharged into the atmosphere through the first fan 14.
Fresh air enters the first four-way air valve 10 through the total heat exchanger 12, is subjected to heat and humidity exchange with the second dehumidification heat exchanger 2 or the first dehumidification heat exchanger 1, passes through the second four-way air valve 11, and is sent into a room through the second fan 15.
The third fan 16 discharges the indoor air to the outside, and the air return valve 13 can be opened by 0-100% of opening, so that the system can be operated by fresh air or fresh air in a certain proportion; the air passes through the total heat recoverer 12 and is subjected to heat and moisture exchange with fresh air.
In a first mode of operation of a preferred embodiment of the present invention as shown in fig. 1, the cooling water circulation line 18 communicates the evaporator 3, the water pump 7, the first three-way valve 8, the second dehumidifying heat exchanger 2 and the second three-way valve 9 by adjusting the first three-way valve 8 and the second three-way valve 9. By adjusting the first four-way air valve 10 and the second four-way air valve 11, fresh air passes through the total heat recoverer 12, the first four-way air valve 10, the second dehumidifying heat exchanger 2, the second four-way air valve 11 and the second fan 15 in sequence under the action of the second fan 15 and enters the room; the hot air passes through the condenser 5, the first four-way air valve 10, the first dehumidifying heat exchanger 1, the second four-way air valve 11 and the first fan 14 in sequence under the action of the first fan 14, and is discharged into the atmosphere.
The fresh air conditioning system driven by the condensation waste heat has the following working process in a first working mode:
the circulating medium in the refrigerant circulation line 17 passes through the compressor 4, the condenser 5, the expansion valve 6 and the evaporator 3, and then flows back to the compressor 4, forming a flow circulation circuit. The temperature of the circulating medium is increased after being compressed by the compressor 4, and then the circulating medium passes through the condenser 5 and releases heat to the condenser 5, so that the temperature is reduced; then the temperature of the circulating medium is continuously reduced through the expansion valve 6; then passes through the evaporator 3, the circulating medium absorbs heat from the cooling water in the cooling water circulating pipeline 18 and the temperature is raised; finally the circulating medium is returned to the compressor 4, forming a closed circuit.
The circulating medium in the cooling water circulation line 18 releases heat to the refrigerant in the refrigerant circulation line 17 through the evaporator 3, and the temperature is lowered; then, the solid adsorbing material passes through a water pump 7, a first three-way valve 8 and a second dehumidifying heat exchanger 2, so that the solid adsorbing material on the surface of the second dehumidifying heat exchanger 2 is cooled; finally the circulating medium passes through a second three-way valve 9 and returns to the evaporator 3, forming a closed circuit.
The fresh air flows through the total heat recoverer 12, the first four-way air valve 10, the second dehumidification heat exchanger 2, the second four-way air valve 11 and the second fan 15 in sequence under the action of the second fan 15. When fresh air flows through the solid adsorption material on the surface of the second dehumidification heat exchanger 2, the solid adsorption material on the surface of the second dehumidification heat exchanger 2 absorbs heat from the fresh air, so that the temperature of the fresh air is reduced; meanwhile, the solid adsorption material on the second dehumidification heat exchanger 2 absorbs moisture from the fresh air, so that the humidity of the fresh air is reduced; then, the fresh air is sent into the room after passing through the second four-way air valve 11 and the second fan 15.
The hot air passes through the surface of the condenser 5, the first four-way air valve 10, the first dehumidification heat exchanger 1, the second four-way air valve 11 and the first fan 14 in sequence under the action of the first fan 14. The hot air absorbs heat from the circulating medium in the condenser 5, the temperature of the hot air rises, the hot air passes through the first four-way air valve 10 and then contacts the surface of the first dehumidifying heat exchanger 1, the solid adsorbing material on the surface of the first dehumidifying heat exchanger 1 is heated and desorbed, and then the hot air is discharged to the atmosphere through the second four-way air valve 11 and the first fan 14.
The indoor air passes through the return air valve 13 or the total heat recoverer 12 under the action of the third fan 16; the indoor air passing through the return air valve 13 is mixed with fresh air and then circulates together with the fresh air; the indoor air passing through the total heat recovery unit 12 is subjected to heat and moisture exchange with fresh air, and then discharged into the atmosphere.
In a second operation mode of a preferred embodiment of the present invention as shown in fig. 2, the cooling water circulation line 18 communicates the evaporator 3, the water pump 7, the first three-way valve 8, the first dehumidifying heat exchanger 1 and the second three-way valve 9 by adjusting the first three-way valve 8 and the second three-way valve 9. By adjusting the first four-way air valve 10 and the second four-way air valve 11, fresh air passes through the total heat recoverer 12, the first four-way air valve 10, the first dehumidifying heat exchanger 1, the second four-way air valve 11 and the second fan 15 in sequence under the action of the second fan 15 and enters the room; the hot air passes through the condenser 5, the first four-way air valve 10, the second dehumidification heat exchanger 2, the second four-way air valve 11 and the first fan 14 in sequence under the action of the first fan 14, and is discharged into the atmosphere.
The fresh air conditioning system driven by the condensation waste heat has the following working process in a second working mode:
the circulating medium in the refrigerant circulation line 17 passes through the compressor 4, the condenser 5, the expansion valve 6 and the evaporator 3, and then flows back to the compressor 4, forming a flow circulation circuit. The temperature of the circulating medium is increased after being compressed by the compressor 4, and then the circulating medium passes through the condenser 5 and releases heat to the condenser 5, so that the temperature is reduced; then the temperature of the circulating medium is continuously reduced through the expansion valve 6; then passes through the evaporator 3, the circulating medium absorbs heat from the cooling water in the cooling water circulating pipeline 18 and the temperature is raised; finally the circulating medium is returned to the compressor 4, forming a closed circuit.
The circulating medium in the cooling water circulation line 18 releases heat to the refrigerant in the refrigerant circulation line 17 through the evaporator 3, and the temperature is lowered; then, the solid adsorbing material passes through a water pump 7 and a first three-way valve 8, and then passes through the first dehumidifying heat exchanger 1, so that the solid adsorbing material on the surface of the first dehumidifying heat exchanger 1 is cooled; finally the circulating medium passes through a second three-way valve 9 and returns to the evaporator 3, forming a closed circuit.
The fresh air flows through the total heat recoverer 12, the first four-way air valve 10, the first dehumidification heat exchanger 1, the second four-way air valve 11 and the second fan 15 in sequence under the action of the second fan 15. When fresh air flows through the solid adsorption material on the surface of the first dehumidification heat exchanger 1, the solid adsorption material on the surface of the first dehumidification heat exchanger 1 absorbs heat from the fresh air, so that the temperature of the fresh air is reduced; meanwhile, the solid adsorption material on the first dehumidification heat exchanger 1 absorbs moisture from the fresh air, so that the humidity of the fresh air is reduced; then, the fresh air is sent into the room after passing through the second four-way air valve 11 and the second fan 15.
The hot air passes through the surface of the condenser 5, the first four-way air valve 10, the second dehumidification heat exchanger 2, the second four-way air valve 11 and the first fan 14 in sequence under the action of the first fan 14. The hot air absorbs heat from the circulating medium in the condenser 5, the temperature of the hot air rises, the hot air passes through the first four-way air valve 10 and then contacts the surface of the second dehumidifying heat exchanger 2, the solid adsorbing material on the surface of the second dehumidifying heat exchanger 2 is heated and desorbed, and then the hot air is discharged to the atmosphere through the second four-way air valve 11 and the first fan 14.
The indoor air passes through the return air valve 13 or the total heat recoverer 12 under the action of the third fan 16; the indoor air passing through the return air valve 13 is mixed with fresh air and then circulates together with the fresh air; the indoor air passing through the total heat recovery unit 12 is subjected to heat and moisture exchange with fresh air, and then discharged into the atmosphere.
The first working mode and the second working mode of the fresh air conditioning system driven by the condensation waste heat are switched mutually, so that continuous heat and humidity treatment can be realized. Under the winter condition, the first four-way air valve 10 and the second four-way air valve 11 are adjusted to introduce the regenerated hot and humid air into the room, and the treated air is discharged out of the room, so that the purposes of heating and humidifying the room are achieved.
According to the invention, the solid adsorption material is used for adsorption dehumidification, and compared with the traditional heat pump fresh air conditioning system, the evaporation temperature of the heat pump system is increased, so that the energy efficiency of the system is improved, the efficiency is improved, and the energy consumption is reduced; the air after the solid desiccant adsorption treatment of the dehumidification heat exchanger can effectively inhibit the diffusion and the spread of harmful microorganisms and chemical substances in the air. The solid adsorption material is attached to the surface of the dehumidification heat exchanger, and compared with the traditional adsorption dehumidification system, the solid adsorption dehumidification system has the advantages of simple manufacturing process, low investment cost and easiness in installation. The invention utilizes the return air valve to adjust the fresh air ratio, and simultaneously utilizes the total heat recoverer to pre-adjust the fresh air, thereby reducing the energy consumption of the system to a certain extent.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A fresh air conditioning system driven by condensation waste heat is characterized by comprising a first dehumidification heat exchanger, a second dehumidification heat exchanger, a condenser, a first four-way air valve, a second four-way air valve, a total heat recoverer, an air return valve, a first fan, a second fan, a third fan, a refrigerant circulation module and a cooling water circulation module;
the outlet of the third fan is divided into two branches, the first branch is connected with the air return valve, and the second branch is connected with the first port of the total heat recoverer; the second port of the total heat recoverer is connected with the first port of the first four-way air valve after being converged with the downstream of the return air valve; the second port of the first four-way air valve is connected with the first inlet of the first dehumidification heat exchanger, and the first outlet of the first dehumidification heat exchanger is connected with the second port of the second four-way air valve; the third port of the first four-way air valve is connected with the first inlet of the second dehumidification heat exchanger, and the first outlet of the second dehumidification heat exchanger is connected with the third port of the second four-way air valve; the fourth port of the second four-way air valve is connected with the inlet of the second fan;
a first outlet of the condenser is connected with a fourth port of the first four-way air valve;
the first port of the second four-way air valve is connected with the inlet of the first fan;
the refrigerant circulation module is connected with a second inlet and a second outlet of the condenser;
and the cooling water circulation module is connected with the first dehumidifying heat exchanger, and a second inlet and a second outlet of the second dehumidifying heat exchanger.
2. The fresh air conditioning system driven by waste heat of condensation as claimed in claim 1, wherein the refrigerant circulation module comprises a refrigerant circulation line, a compressor, an expansion valve and an evaporator.
3. The fresh air conditioning system driven by waste heat of condensation as claimed in claim 1, wherein the cooling water circulation module comprises a cooling water circulation pipeline, a first three-way valve, a second three-way valve and a water pump, and the cooling water circulation module is connected with the first inlet and the first outlet of the evaporator through the cooling water circulation pipeline.
4. The fresh air conditioning system driven by waste heat of condensation as claimed in claim 1, wherein the surfaces of the first and second dehumidifying heat exchangers are coated with a solid adsorption material.
5. The fresh air conditioning system driven by waste heat of condensation as claimed in claim 1, wherein said solid adsorbent material is attached to the surface of said first desiccant heat exchanger and said second desiccant heat exchanger by metal surface desiccant coating technology.
6. The fresh air conditioning system driven by the condensed waste heat as claimed in claim 1, wherein the opening degree of the return valve is 0-100%.
7. A method for operating a fresh air conditioning system driven by waste heat of condensation as claimed in any one of claims 1 to 6, wherein the method comprises a first operation mode and a second operation mode, and the operation modes are switched by adjusting the first three-way valve and the second three-way valve and the first four-way air valve and the second four-way air valve.
8. The method of operating a waste heat condensing driven fresh air conditioning system as recited in claim 7 wherein said first mode of operation comprises the process of:
a. the circulating medium of the refrigerant circulating pipeline flows through the compressor, the condenser, the expansion valve and the evaporator and then flows back to the compressor to form a flowing circulating loop;
b. the cooling water circulation pipeline is communicated with the evaporator, the water pump, the first three-way valve, the second dehumidification heater and the second three-way valve; the circulating medium of the cooling water circulating pipeline flows through the evaporator, the water pump, the first three-way valve, the second dehumidification heat exchanger and the second three-way valve and then flows back to the evaporator to form a closed loop;
c. fresh air sequentially flows through the total heat recoverer, the first four-way air valve, the second dehumidification heat exchanger, the second four-way air valve and the second fan under the action of the second fan, and is finally sent into a room;
d. the hot air sequentially flows through the condenser, the first four-way air valve, the first dehumidification heat exchanger, the second four-way air valve and the first fan under the action of the first fan, and is finally discharged into the atmosphere;
e. and indoor air flows through the air return valve or the total heat recoverer under the action of the third fan.
9. The method of operating a waste heat condensing driven fresh air conditioning system as recited in claim 7 wherein said second mode of operation comprises the process of:
a. the circulating medium of the refrigerant circulating pipeline flows through the compressor, the condenser, the expansion valve and the evaporator and then flows back to the compressor to form a flowing circulating loop;
b. the cooling water circulation pipeline is communicated with the evaporator, the water pump, the first three-way valve, the first dehumidification heater and the second three-way valve; the circulating medium of the cooling water circulating pipeline flows through the evaporator, the water pump, the first three-way valve, the first dehumidification heat exchanger and the second three-way valve and then flows back to the evaporator to form a closed loop;
c. fresh air sequentially flows through the total heat recoverer, the first four-way air valve, the first dehumidification heat exchanger, the second four-way air valve and the second fan under the action of the second fan, and is finally sent into a room;
d. the hot air sequentially flows through the condenser, the first four-way air valve, the second dehumidification heat exchanger, the second four-way air valve and the first fan under the action of the first fan, and is finally discharged into the atmosphere;
e. and indoor air flows through the air return valve or the total heat recoverer under the action of the third fan.
10. The method of claim 7, wherein the first four-way damper and the second four-way damper are adjusted to provide heating and humidification to the room in the first operating mode and the second operating mode.
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