CN106839354B - Inner loop heat recovery fresh air unit - Google Patents
Inner loop heat recovery fresh air unit Download PDFInfo
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- CN106839354B CN106839354B CN201710219368.0A CN201710219368A CN106839354B CN 106839354 B CN106839354 B CN 106839354B CN 201710219368 A CN201710219368 A CN 201710219368A CN 106839354 B CN106839354 B CN 106839354B
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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
- 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
- F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
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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
- F24F13/28—Arrangement or mounting of filters
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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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
- 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
- F24F3/153—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 with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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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
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
- F24F2013/227—Condensate pipe for drainage of condensate from the evaporator
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
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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)
- Fuzzy Systems (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
- Central Air Conditioning (AREA)
Abstract
The invention relates to an internal circulation heat recovery fresh air handling unit, which comprises a shell, a first plate heat exchanger, a second plate heat exchanger, a compressor, a water-cooled condenser and an evaporator, wherein the first plate heat exchanger and the second plate heat exchanger are arranged side by side; be equipped with fresh air inlet and supply-air outlet on the casing roof, the left side wall and the right side wall correspondence of casing are equipped with return air inlet and air exit, and the evaporimeter sets up in the downside of second plate heat exchanger side by side. The heat recovery system has the advantages of simple structure, high heat recovery rate and high energy efficiency ratio, and can realize intelligent control and low-energy-consumption operation.
Description
Technical Field
The invention relates to air conditioning equipment, in particular to an internal circulation heat recovery fresh air handling unit capable of operating with high efficiency and low energy consumption all year round.
Background
Along with the development of economy and society, people have higher and higher requirements on living environment, so that the rapid development of building energy conservation and air conditioning equipment is promoted, various fresh air handling units are provided, and the cooling and dehumidifying treatment of air in summer and the heating and humidifying treatment of air in winter are realized through the operation of the fresh air handling units. The existing fresh air handling unit mainly adopts a heat pump mode and comprises a compressor, an evaporator, a water-cooling (air-cooling) condenser, an expansion valve, a reheater and other parts. In the operation process in summer, the refrigeration working medium is converted between gas state and liquid state through a compressor, an expansion valve and the like, on one hand, the refrigeration working medium releases heat at a water-cooling (air-cooling) condenser and discharges the heat through water cooling or air cooling, on the other hand, the refrigeration working medium absorbs the heat at an evaporator and reduces the temperature of air which exchanges heat with the evaporator, thereby achieving the purposes of cooling and dehumidifying fresh air. Simultaneously, current new fan group still carries out preliminary treatment to the new trend through set up precooling apparatus in the front side of evaporimeter to reinforcing cooling dehumidification effect, and set up the re-heater through the rear side at the evaporimeter and reheat the air after cooling dehumidification, influence indoor air quality with avoiding the temperature to hang down excessively. In winter, the flow direction of the refrigeration working medium is converted through the four-way reversing valve, so that the heat exchange process is opposite to that in summer, and the heating purpose is realized. Although the existing fresh air handling unit can achieve the purpose of basic fresh air handling, the existing fresh air handling unit still has a plurality of storage problems in practical application, needs to be further improved and perfected and is mainly expressed in the following aspects: 1. the energy of return air is not fully utilized, so that the energy consumption of the unit is high, the energy efficiency is low, and the heat exchange efficiency is low. 2. The multifunctional combined type air conditioning unit is only suitable for being used in winter and summer, has single function and influences the utilization rate of the unit. 3. The environmental adaptability is poor, and the intelligent control and energy conservation are not facilitated.
Disclosure of Invention
The invention aims to provide an internal circulation heat recovery fresh air handling unit which has the advantages of simple structure, complete functions, high heat recovery rate and high energy efficiency ratio, can be operated in various modes according to indoor and outdoor air conditions, and realizes intelligent control and annual high-efficiency and low-energy-consumption operation.
In order to solve the problems of low energy efficiency ratio, single function, poor environmental adaptability and being not beneficial to intelligent control and energy conservation of a fresh air unit in the prior art, the invention provides an internal circulation heat recovery fresh air unit which comprises a shell, a first plate heat exchanger, a second plate heat exchanger, a compressor, a water-cooled condenser and an evaporator, wherein a vertical air duct and a transverse air duct are respectively arranged in the first plate heat exchanger and the second plate heat exchanger and are arranged in the middle of an inner cavity of the shell side by side; a fresh air inlet is arranged on the top wall of the shell between the first partition plate and the second partition plate, an air supply outlet is arranged on the top wall of the shell between the second partition plate and the third partition plate, and an air return inlet and an air exhaust outlet are correspondingly arranged on the upper part of the left side wall and the upper part of the right side wall of the shell;
the compressor, the water-cooled condenser and the evaporator are arranged in the shell, the evaporator is arranged on the lower side of the second plate type heat exchanger side by side, the compressor, the water-cooled condenser and the evaporator are sequentially connected through pipelines to form a heat pump system, and an expansion device is arranged on a pipeline between the water-cooled condenser and the evaporator.
Furthermore, the internal circulation heat recovery fresh air handling unit is also provided with an air-cooled condenser, the air-cooled condenser is arranged on the left side of the first plate heat exchanger side by side, the air-cooled condenser and the water-cooled condenser are connected in parallel, control valves are arranged on respective parallel branches, and a four-way reversing valve for converting the flow direction of a working medium is arranged in a heat pump system.
Further, according to the internal circulation heat recovery fresh air handling unit, an air supply fan is arranged between the second partition plate and the third partition plate and below the air supply opening, and an air exhaust fan is arranged between the third partition plate and the left side wall of the shell and below the air return opening.
Further, according to the internal circulation heat recovery fresh air handling unit, an electrostatic filter and a high-efficiency filter are arranged between the first partition plate and the second partition plate from top to bottom, and a primary filter is arranged on the upper side of the exhaust fan and on the lower side of the air return opening.
Further, according to the internal circulation heat recovery fresh air handling unit, a reheater is arranged between the second partition plate and the third partition plate and on the upper side of the air supply fan.
Further, the internal circulation heat recovery fresh air handling unit is characterized in that a first air valve used for opening and closing a fresh air inlet is arranged between the first partition plate and the second partition plate and on the upper side of the electrostatic filter, a second air valve used for opening and closing an air outlet is arranged in the shell and in a position corresponding to the air outlet, and a third air valve is arranged on the first partition plate and on the lower side of the high-efficiency filter.
Further, according to the internal circulation heat recovery fresh air handling unit, a fourth air valve is arranged on the second partition plate and on the lower side of the high-efficiency filter.
Further, the internal circulation heat recovery fresh air handling unit further comprises a control device which is electrically connected with the compressor, the air supply fan, the air exhaust fan, the first air valve, the second air valve, the third air valve and the fourth air valve respectively.
Further, the invention relates to an internal circulation heat recovery fresh air handling unit, wherein the compressor is a variable frequency compressor.
Further, the invention relates to an internal circulation heat recovery fresh air handling unit, wherein a water collecting tray is arranged on the lower side of the evaporator.
Compared with the prior art, the internal circulation heat recovery fresh air handling unit has the following advantages: (1) According to the invention, the shell, the first plate heat exchanger, the second plate heat exchanger, the compressor, the water-cooled condenser and the evaporator are arranged, the vertical air duct and the transverse air duct are respectively arranged in the first plate heat exchanger and the second plate heat exchanger and are arranged in the middle of the inner cavity of the shell side by side, the first partition plate is arranged between the upper side of the right end of the first plate heat exchanger and the top wall of the shell, the second partition plate is arranged between the joint of the first plate heat exchanger and the second plate heat exchanger and the top wall of the shell, the third partition plate is arranged between the upper side of the left end of the second plate heat exchanger and the top wall of the shell, the fourth partition plate is arranged between the lower side of the left end of the second plate heat exchanger and the bottom wall of the shell, and the fifth partition plate is arranged between the lower side of the right end of the first plate heat exchanger and the right side wall of the shell. And a fresh air inlet is arranged on the top wall of the shell between the first partition plate and the second partition plate, an air supply outlet is arranged on the top wall of the shell between the second partition plate and the third partition plate, and a return air inlet and an air outlet are correspondingly arranged on the upper parts of the left side wall and the right side wall of the shell. Meanwhile, the compressor, the water-cooled condenser and the evaporator are arranged in the shell, the evaporator is arranged on the lower side of the second plate type heat exchanger side by side, the compressor, the water-cooled condenser and the evaporator are sequentially connected to form a heat pump system, and an expansion device is arranged on a pipeline between the water-cooled condenser and the evaporator. Therefore, the internal circulation heat recovery fresh air handling unit with simple structure, high heat recovery rate and high energy efficiency ratio is formed. In practical application, the fresh air sequentially passes through the fresh air opening, the vertical air duct of the first plate heat exchanger, the evaporator and the vertical air duct of the second plate heat exchanger to reach the passage of the air supply opening to form an air supply duct through the first partition plate, the second partition plate, the third partition plate, the fourth partition plate and the fifth partition plate; the air return passes through the air return inlet, the transverse air duct of the second plate heat exchanger, the transverse air duct of the first plate heat exchanger and the passage from the air-cooled condenser to the air outlet in sequence to form an air exhaust air duct, and the fresh air and the air return can be subjected to sufficient heat exchange in the first plate heat exchanger and the second plate heat exchanger, so that the recycling of the energy of the air return can be realized. According to the invention, the evaporators are arranged at the lower side of the second plate heat exchanger side by side, so that the temperature difference between the dehumidified fresh air and the return air can be increased during cooling and dehumidification in summer, the heat exchange efficiency and the return air heat recovery rate between the dehumidified fresh air and the return air are improved, the temperature of the heat exchanged fresh air has a relatively high level, the requirement on the indoor air temperature can be met without reheating under the common condition, and the purposes of saving energy, reducing consumption and improving the energy efficiency ratio of a unit are realized. (2) As an optimized scheme, the invention is also provided with an air-cooled condenser, the air-cooled condenser is arranged on the left side of the first plate heat exchanger side by side, the air-cooled condenser and the water-cooled condenser are connected in parallel, control valves are arranged on respective parallel branches, and a four-way reversing valve for converting the flow direction of working media is arranged in the heat pump system. The structure arrangement enables the fresh air handling unit to be suitable for operation in summer and also be used in winter, and improves the application range and the utilization rate of equipment. Under the working condition in winter, the water-cooled condenser is stopped, the air-cooled condenser is operated, and the four-way reversing valve is used for reversing the flow direction of the working medium, so that the functions of the evaporator and the air-cooled condenser are interchanged, and the heating purpose in winter can be realized. (3) As a further optimized scheme, the air supply fan and the air exhaust fan are arranged, the air supply fan is arranged between the second partition plate and the third partition plate and is positioned at the lower side of the air supply opening, and the air exhaust fan is arranged between the third partition plate and the left side wall of the shell and is positioned at the lower side of the air return opening. The structure improves the integration level of the fresh air handling unit, the wind direction guiding can be realized without independently arranging a fan, and the installation and the use are more convenient and faster. And through set up electrostatic filter and high efficiency filter between first baffle and second baffle, set up the primary filter at the fan upside of airing exhaust and be in the return air inlet downside to realize the filtration treatment to new trend and return air, can guarantee the indoor air quality on the one hand, on the other hand can avoid the dust in new trend and the return air to get into first plate heat exchanger and second plate heat exchanger and influence heat exchange efficiency. In addition, the first air valve for opening and closing the fresh air port is arranged between the first partition plate and the second partition plate and on the upper side of the electrostatic filter, the second air valve for opening and closing the air outlet is arranged in the shell and in a position corresponding to the air outlet, and the third air valve is arranged on the first partition plate and on the lower side of the high-efficiency filter, so that the use flexibility and the environment adaptability of the unit can be effectively enhanced. In the operation process, the return air carries out two heat exchange processes in the first plate heat exchanger and the second plate heat exchanger, so that the return air has relatively low temperature when reaching the evaporator, the cold consumption of the evaporator is reduced, the cold utilization rate is improved, and the dehumidification effect can be enhanced.
The internal circulation heat recovery fresh air handling unit of the present invention will be further described in detail with reference to the following embodiments shown in the accompanying drawings:
drawings
FIG. 1 is a schematic structural diagram of a first embodiment of an internal circulation heat recovery fresh air handling unit according to the present invention;
FIGS. 2 and 3 are schematic structural diagrams of a second embodiment of an internal circulation heat recovery fresh air handling unit according to the invention;
fig. 4 is a schematic structural diagram of a third embodiment of an internal circulation heat recovery fresh air handling unit according to the present invention.
Detailed Description
It should be noted that the terms "upper", "lower", "left", "right", and the like in the description are used for convenience of understanding and are not intended to limit the scope of the present invention. Also, the terms fresh air, return air and air in this document should be understood to have the same concept.
Fig. 1 shows a schematic diagram of a first embodiment of an internal circulation heat recovery fresh air handling unit according to the present invention, which includes a housing 1, a first plate heat exchanger 2, a second plate heat exchanger 3, a compressor 4, a water-cooled condenser 5, and an evaporator 6. Vertical air ducts and transverse air ducts are arranged in the first plate heat exchanger 2 and the second plate heat exchanger 3, and the first plate heat exchanger and the second plate heat exchanger are arranged in the middle of an inner cavity of the shell 1 side by side. Set up first baffle 11 between 2 right-hand member upsides of first plate heat exchanger and 1 roof of casing, set up second baffle 12 between the junction of first plate heat exchanger 2 and second plate heat exchanger 3 and 1 roof of casing, set up third baffle 13 between 3 left end upsides of second plate heat exchanger and 1 roof of casing, set up fourth baffle 14 between 3 left end undersides of second plate heat exchanger and 1 diapire of casing, set up fifth baffle 15 between 2 right-hand member undersides of first plate heat exchanger and 1 right side wall of casing. And a fresh air inlet 16 is arranged on the top wall of the shell 1 between the first partition plate 11 and the second partition plate 12, an air supply outlet 17 is arranged on the top wall of the shell 1 between the second partition plate 12 and the third partition plate 13, and a return air inlet 18 and an air outlet 19 are correspondingly arranged on the upper parts of the left side wall and the right side wall of the shell 1. Meanwhile, the compressor 4, the water-cooled condenser 5 and the evaporator 6 are arranged in the shell 1, and the compressor 4 and the water-cooled condenser 5 are usually arranged at the lower side positions of the first plate heat exchanger 2 and the second plate heat exchanger 3, and can also be arranged at other positions in the shell 1; while the evaporators 6 are arranged side by side on the lower side of the second plate heat exchanger 3. The compressor 4, the water-cooled condenser 5 and the evaporator 6 are connected in sequence through pipelines to form a heat pump system, and an expansion device is arranged on a pipeline between the water-cooled condenser 5 and the evaporator 6.
The internal circulation heat recovery fresh air handling unit with simple structure, high heat recovery rate and high energy efficiency ratio is formed through the structure. In practical application, a path from the fresh air to the air supply outlet 17 sequentially passes through the fresh air inlet 16, the vertical air duct of the first plate heat exchanger 2, the evaporator 6 and the vertical air duct of the second plate heat exchanger 3 to form an air supply duct through the first partition plate 11, the second partition plate 12, the third partition plate 13, the fourth partition plate 14 and the fifth partition plate 15; the return air passes through the return air inlet 18, the transverse air duct of the second plate heat exchanger 3, the transverse air duct of the first plate heat exchanger 2 and the air-cooled condenser 7 in sequence to reach the air outlet 19 to form an air exhaust air duct, and the fresh air and the return air are subjected to sufficient heat exchange in the first plate heat exchanger 2 and the second plate heat exchanger 3, so that the return air energy can be recycled. According to the invention, the evaporators 6 are arranged at the lower side of the second plate heat exchanger 3 side by side, so that the temperature difference between the dehumidified fresh air and the return air can be increased during cooling and dehumidification in summer, the heat exchange efficiency and the return air heat recovery rate between the dehumidified fresh air and the return air are improved, the temperature of the heat exchanged fresh air is relatively high, the requirement on the indoor air temperature can be met without reheating under the common condition, and the purposes of saving energy, reducing consumption and improving the energy efficiency ratio of a unit are achieved.
As an optimized scheme, the air-cooled condenser 7 is further arranged in the embodiment, the air-cooled condenser 7 is arranged on the left side of the first plate heat exchanger 2 side by side, the air-cooled condenser 7 and the water-cooled condenser 5 are connected in parallel, control valves are arranged on respective connecting branches, and meanwhile, a four-way reversing valve for converting the flow direction of the working medium is arranged in the heat pump system. The structure makes the unit suitable for both summer operation and winter operation, and improves the application range and the utilization rate of the equipment. Under the working condition in winter, the water-cooled condenser 5 is stopped, the air-cooled condenser 7 is operated, the flow direction of the working medium is converted through the four-way reversing valve, the functions of the evaporator 6 and the air-cooled condenser 7 are interchanged, and the heating purpose in winter can be achieved.
As a further preferable mode, in the present embodiment, the air supply fan 171 is provided between the second partition 12 and the third partition 13 and below the air supply port 17, and the air discharge fan 181 is provided between the third partition 13 and the left side wall of the casing 1 and below the air return port 18. The structure improves the integration level of the unit, and can realize wind direction guiding without independently arranging a fan, so that the installation and the use are more convenient and faster. And through set up electrostatic filter 161 and high efficiency filter 162 from top to bottom between first baffle 11 and second baffle 12, set up primary filter 182 at the fan 181 upside of airing exhaust and be in the air return 18 downside to the realization is to the filtration treatment of new trend and return air, can guarantee indoor air quality on the one hand, and on the other hand can avoid the dust in new trend and the return air to get into first plate heat exchanger 2 and second plate heat exchanger 3 and influence its heat exchange efficiency. It should be noted that the air supply fan 171 and the air exhaust fan 181 are not limited to be disposed at the above positions, and may be disposed at other positions of the air exhaust duct and the air supply duct, as long as the air direction guiding is achieved. In addition, in the present embodiment, the reheater 8 is further disposed between the second partition plate 12 and the third partition plate 13 and above the air supply fan 171, so that the temperature of the air after cooling and dehumidifying can be effectively prevented from being too low. In practical application, the reheater 8 may be connected to a separate water source, or may be connected in series to the circulating water side of the water-cooled condenser 5 through a pipeline.
As shown in fig. 2 and fig. 3, the second embodiment of the internal circulation heat recovery fresh air handling unit according to the present invention is different from the first embodiment in that a first air valve 163 for opening and closing the fresh air inlet 16 is further disposed between the first partition 11 and the second partition 12 and above the electrostatic filter 161, a second air valve 191 for opening and closing the air outlet 19 is disposed inside the casing 1 and at a position corresponding to the air outlet 19, and a third air valve 111 is disposed on the first partition 11 and below the high efficiency filter 162. The structural arrangement can effectively enhance the use flexibility and the environment adaptability of the unit. In practical applications, the unit can be operated as in the first embodiment by opening the first air valve 163 and the second air valve 191 and closing the third air valve 111. However, when fresh air does not need to be supplemented indoors in summer and only indoor air needs to be cooled and dehumidified, the fresh air port 16 and the air outlet 19 can be closed through the first air valve 163 and the second air valve 191, the third air valve 111 is opened, indoor return air is sent back to the room through the air return port 18, the transverse air duct of the second plate heat exchanger 3, the transverse air duct of the first plate heat exchanger 2, the air-cooled condenser 7, the third air valve 111, the vertical air duct of the first plate heat exchanger 2, the evaporator 6, the vertical air duct of the second plate heat exchanger 3, the reheater 8 and the air supply port 17 in sequence, and accordingly circulating cooling and dehumidifying treatment of the indoor air is achieved. In the operation process, the return air carries out twice heat exchange processes in the first plate heat exchanger 2 and the second plate heat exchanger 3, so that the return air has relatively low temperature when reaching the evaporator 6, the cold consumption of the evaporator 6 can be reduced, the cold utilization rate and the cooling and dehumidifying effects are improved, the return air reaching the reheater 8 can also have relatively high temperature, the heat consumption of the reheater 8 is reduced, and the technical purposes of reducing consumption and improving the energy efficiency ratio are achieved.
Referring to fig. 4, a third embodiment of the internal circulation heat recovery fresh air handling unit according to the present invention is different from the first two embodiments in that a fourth air valve 121 is further disposed on the second partition 12 and under the high efficiency filter 162. The structure further enhances the use flexibility and the environment adaptability of the unit, so that the unit can select more different operation modes according to the indoor and outdoor air conditions, and the unit can realize intelligent and low-energy-consumption operation through the control device while enhancing the applicability of the unit. In practical applications, the unit can be operated as in the first embodiment by opening the first air valve 163 and the second air valve 191 and closing the third air valve 111 and the fourth air valve 121. When only indoor air needs to be cooled and dehumidified in summer, the unit can be operated like the second embodiment by closing the first air valve 163, the second air valve 191 and the fourth air valve 121 and opening the third air valve 111. However, when only fresh air needs to be supplemented indoors without cooling and dehumidifying, the first air valve 163, the second air valve 191 and the fourth air valve 121 can be opened, and the third air valve 111 can be closed, so that the fresh air can rapidly enter indoors through the fresh air port 16, the fourth air valve 121, the reheater 8 and the air supply port 17, and can be discharged outdoors through the return air port 18, the transverse air duct of the second plate heat exchanger 3, the transverse air duct of the first plate heat exchanger 2, the air-cooled condenser 7 and the air exhaust port 19, at this time, the compressor 4, the water-cooled condenser 5, the evaporator 6, the air-cooled condenser 7 and the reheater 8 are all stopped to work, and the purpose of rapid air exchange can be achieved only by the operation of the air supply fan 171 and the exhaust fan 181, and the operation with low energy consumption is achieved.
It should be noted that in practical application, the present invention further provides a control device, the control device is electrically connected to the compressor 4, the air supply fan 171, the exhaust fan 181, the first air valve 163, the second air valve 191, the third air valve 111, and the fourth air valve 121, respectively, and the compressor 4 is a variable frequency compressor, so that the unit can select different operation modes according to indoor and outdoor air conditions, and the purposes of intelligent control and low energy consumption operation are achieved. In addition, the invention is provided with a water collecting tray 9 at the lower side of the evaporator in general case, so as to collect the condensed water generated by the evaporator 6 and output the condensed water to the outside of the shell.
To help those skilled in the art understand the present invention, the following uses the third embodiment as an example to briefly describe the control method and operation process of an internal circulation heat recovery fresh air handling unit according to the present invention.
Normal cooling dehumidification mode in summer:
the first air valve 163 and the second air valve 191 are opened, the third air valve 111 and the fourth air valve 121 are closed, the air supply fan 171, the exhaust fan 181, the compressor 4, the water-cooled condenser 5 and the evaporator 6 are operated, the air-cooled condenser 7 is stopped, and the reheater 8 is operable and stoppable according to actual conditions. Fresh air sequentially passes through a fresh air port 16, a first air valve 163, an electrostatic filter 161, a high-efficiency filter 162, a vertical air duct of the first plate heat exchanger 2, the evaporator 6, a vertical air duct of the second plate heat exchanger 3, an air supply fan 171, a reheater 8 and an air supply port 17 to enter the room; the return air is discharged out of the room through the return air inlet 18, the primary filter 182, the exhaust fan 181, the transverse air duct of the second plate heat exchanger 3, the transverse air duct of the first plate heat exchanger 2, the air-cooled condenser 7, the second air valve 191 and the air outlet 19 in sequence.
Indoor air circulation cooling dehumidification mode in summer:
the first air valve 163, the second air valve 191 and the fourth air valve 121 are closed, the third air valve 111 is opened, the air supply fan 171, the exhaust fan 181, the compressor 4, the water-cooled condenser 5 and the evaporator 6 are operated, the air-cooled condenser 7 is stopped, and the reheater 8 is operable and stoppable according to actual conditions. The return air passes through the return air inlet 18, the primary filter 182, the exhaust fan 181, the transverse air duct of the second plate heat exchanger 3, the transverse air duct of the first plate heat exchanger 2, the air-cooled condenser 7, the third air valve 111, the vertical air duct of the first plate heat exchanger 2, the evaporator 6, the vertical air duct of the second plate heat exchanger 3, the air supply fan 171, the reheater 8 and the air supply outlet 17 in sequence and then is returned to the indoor space.
Winter heating mode:
the flow direction of the refrigeration working medium is changed through the four-way reversing valve, so that the functions of the air-cooled condenser 7 and the evaporator 6 are exchanged, the first air valve 163 and the second air valve 191 are opened, the third air valve 111 and the fourth air valve 121 are closed, the air supply fan 171, the exhaust fan 181, the compressor 4, the evaporator 6 and the air-cooled condenser 7 are operated, and the water-cooled condenser 5 and the reheater 8 are stopped. Fresh air sequentially passes through a fresh air port 16, a first air valve 163, an electrostatic filter 161, a high-efficiency filter 162, a vertical air duct of the first plate heat exchanger 2, the evaporator 6, a vertical air duct of the second plate heat exchanger 3, an air supply fan 171, a reheater 8 and an air supply port 17 to enter the room; the return air is discharged out of the room through the return air inlet 18, the primary filter 182, the exhaust fan 181, the transverse air duct of the second plate heat exchanger 3, the transverse air duct of the first plate heat exchanger 2, the air-cooled condenser 7, the second air valve 191 and the air outlet 19 in sequence.
Spring and autumn normal mode:
the first damper 163 and the second damper 191 are opened, the third damper 111 and the fourth damper 121 are closed, and the air supply fan 171 and the air exhaust fan 181 are operated to stop the compressor 4, the water-cooled condenser 5, the evaporator 6, the air-cooled condenser 7, and the reheater 8. Fresh air sequentially passes through a fresh air port 16, a first air valve 163, an electrostatic filter 161, a high-efficiency filter 162, a vertical air duct of the first plate heat exchanger 2, the evaporator 6, a vertical air duct of the second plate heat exchanger 3, an air supply fan 171, a reheater 8 and an air supply port 17 to enter the room; the return air is discharged out of the room through the return air inlet 18, the primary filter 182, the exhaust fan 181, the transverse air duct of the second plate heat exchanger 3, the transverse air duct of the first plate heat exchanger 2, the air-cooled condenser 7, the second air valve 191 and the air outlet 19 in sequence.
Spring and autumn quick ventilation mode:
the first damper 163, the second damper 191, and the fourth damper 121 are opened, the third damper 111 is closed, and the air supply fan 171 and the air exhaust fan 181 are operated to stop the compressor 4, the water-cooled condenser 5, the evaporator 6, the air-cooled condenser 7, and the reheater 8. Fresh air sequentially passes through a fresh air inlet 16, a first air valve 163, an electrostatic filter 161, a high-efficiency filter 162, a fourth air valve 121, an air supply fan 171, a reheater 8 and an air supply outlet 17 to enter the room; the return air is discharged outdoors through a return air inlet 18, a primary filter 182, an exhaust fan 181, a transverse air duct of the second plate heat exchanger 3, a transverse air duct of the first plate heat exchanger 2, an air-cooled condenser 7, a second air valve 191 and an exhaust outlet 19 in sequence.
The above examples are only for describing the preferred embodiments of the present invention, and do not limit the scope of the claimed invention, and those skilled in the art should make various modifications in terms of the technical solution of the present invention without departing from the spirit of the present invention, which falls within the scope of the invention defined by the claims.
Claims (8)
1. An inner circulation heat recovery fresh air handling unit comprises a shell (1), a first plate type heat exchanger (2), a second plate type heat exchanger (3), a compressor (4), a water-cooled condenser (5) and an evaporator (6), and is characterized in that a vertical air duct and a transverse air duct are arranged in the first plate type heat exchanger (2) and the second plate type heat exchanger (3) and are arranged in the middle of an inner cavity of the shell (1) side by side, a first partition plate (11) is arranged between the upper side of the right end of the first plate type heat exchanger (2) and the top wall of the shell (1), a second partition plate (12) is arranged between the joint of the first plate type heat exchanger (2) and the second plate type heat exchanger (3) and the top wall of the shell (1), a third partition plate (13) is arranged between the upper side of the left end of the second plate type heat exchanger (3) and the top wall of the shell (1), a fourth partition plate (14) is arranged between the lower side of the left end of the second plate type heat exchanger (3) and the bottom wall of the shell (1), and a fifth partition plate (15) is arranged between the lower side wall of the right end of the first plate type heat exchanger (2) and the shell (1); a fresh air inlet (16) is arranged on the top wall of the shell (1) between the first partition plate (11) and the second partition plate (12), an air supply outlet (17) is arranged on the top wall of the shell (1) between the second partition plate (12) and the third partition plate (13), and an air return inlet (18) and an air exhaust outlet (19) are correspondingly arranged on the upper parts of the left side wall and the right side wall of the shell (1);
the compressor (4), the water-cooled condenser (5) and the evaporator (6) are arranged in the shell (1), the evaporator (6) is arranged on the lower side of the second plate heat exchanger (3) side by side, the compressor (4), the water-cooled condenser (5) and the evaporator (6) are connected in sequence through pipelines to form a heat pump system, and an expansion device is arranged on a pipeline between the water-cooled condenser (5) and the evaporator (6);
an electrostatic filter (161) and a high-efficiency filter (162) are arranged between the first partition plate (11) and the second partition plate (12) from top to bottom; a first air valve (163) for opening and closing the fresh air opening (16) is arranged between the first partition plate (11) and the second partition plate (12) and on the upper side of the electrostatic filter (161), a second air valve (191) for opening and closing the air outlet (19) is arranged in the shell (1) and at a position corresponding to the air outlet (19), and a third air valve (111) is arranged on the first partition plate (11) and on the lower side of the high-efficiency filter (162); and a fourth air valve (121) is arranged on the second partition plate (12) and at the lower side of the high-efficiency filter (162).
2. The new fan unit for internal circulation heat recovery according to claim 1, characterized in that an air-cooled condenser (7) is further provided, the air-cooled condenser (7) is arranged side by side on the right side of the first plate heat exchanger (2), the air-cooled condenser (7) is connected in parallel with the water-cooled condenser (5) and is provided with a control valve on each branch circuit, and a four-way reversing valve for switching the flow direction of the working medium is arranged in the heat pump system.
3. The new air handling unit for internal circulation heat recovery according to claim 2, wherein a blower (171) is disposed between the second partition (12) and the third partition (13) and under the blower (17), and an exhaust blower (181) is disposed between the third partition (13) and the left sidewall of the casing (1) and under the return air inlet (18).
4. The new air handling unit for internal circulation heat recovery according to claim 3, wherein a primary filter (182) is provided above the exhaust fan (181) and below the return air inlet (18).
5. An inner circulation heat recovery fresh air handling unit according to claim 4, wherein a reheater (8) is provided between the second partition (12) and the third partition (13) and above the blower (171).
6. The new air handling unit for internal circulation heat recovery according to claim 5, further comprising a control device electrically connected to the compressor (4), the air supply fan (171), the air exhaust fan (181), the first air valve (163), the second air valve (191), the third air valve (111), and the fourth air valve (121), respectively.
7. An internal circulation heat recovery fresh air handling unit according to any one of claims 1 to 6, wherein the compressor (4) is an inverter compressor.
8. An internally circulating heat recovery fresh air handling unit according to any of claims 1 to 6, wherein a water collection tray (9) is provided on the underside of the evaporator (6).
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| CN108224738A (en) * | 2018-02-11 | 2018-06-29 | 宁波保税区瑞丰模具科技有限公司 | A kind of dehumidifier quickly descends water-bound |
| CN111306670B (en) * | 2020-04-09 | 2024-03-08 | 韩晓丽 | Separated external window type fresh air purifier |
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