CN102798202B - Total heat exchanger and fresh air handling unit system - Google Patents
Total heat exchanger and fresh air handling unit system Download PDFInfo
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- CN102798202B CN102798202B CN201210273260.7A CN201210273260A CN102798202B CN 102798202 B CN102798202 B CN 102798202B CN 201210273260 A CN201210273260 A CN 201210273260A CN 102798202 B CN102798202 B CN 102798202B
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 61
- 238000007791 dehumidification Methods 0.000 claims abstract description 20
- 239000003507 refrigerant Substances 0.000 claims description 74
- 239000002245 particle Substances 0.000 claims description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 40
- 239000007788 liquid Substances 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 239000002826 coolant Substances 0.000 abstract 4
- 238000012546 transfer Methods 0.000 description 15
- 238000004378 air conditioning Methods 0.000 description 8
- 230000001960 triggered effect Effects 0.000 description 7
- 238000005057 refrigeration Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The invention discloses a total heat exchanger and a fresh air handling unit system. The total heat exchanger comprises moisture absorption grains, cooling medium channel pipes, shunt pipes and a screen mesh, wherein the shunt pipes are symmetrically distributed on the two ends of the total heat exchanger along a longitudinal direction, and multiple cooling medium channel pipes are formed on the total heat exchanger along the longitudinal direction; each cooling medium channel pipe is respectively communicated with the corresponding shunt pipe, and the gap of each cooling medium channel is divided into multiple independent spaces by screen mesh in a horizontal direction; and the moisture absorption grains are filled in the separate independent spaces in a porous medium form. By the total heat exchanger and the fresh air handling unit system provided by the invention, the dehumidification and humidification performances of an air conditioner are enhanced and the operating efficiency of the air conditioner is improved.
Description
Technical Field
The invention relates to the air conditioning technology, in particular to a total heat exchanger and a fresh air handling unit system.
Background
Along with the continuous improvement of people's standard of living, under living and indoor operational environment, through installing air conditioning system for promote living and operational environment's travelling comfort, become an important selection that people improved the travelling comfort demand. The multi-split air conditioner technology is an important direction for air conditioner development because of the advantages of free control, high efficiency, energy conservation, convenience in installation and maintenance and the like.
A multi-split air conditioning system generally includes one or more outdoor units, one or more indoor units, and a line controller, where the line controller is connected to the indoor units, and the indoor units are connected to the outdoor units. The outdoor unit generally comprises an outdoor heat exchanger, a compressor and other refrigeration accessories; compared with a plurality of household air conditioners, the outdoor unit of the multi-split air conditioning system is shared, the equipment cost can be effectively reduced, the centralized management of each indoor unit can be realized, one indoor unit can be independently started to operate, a plurality of indoor units can also be simultaneously started to operate, and the control is more flexible.
When adopting multi-split air conditioning system to carry out air treatment, in order to realize that indoor new trend takes a breath, return air cold volume (heat) are retrieved and dehumidification (humidification) function to satisfy user's diversified demand, fall below the air dew point with supply air temperature earlier, in order to reduce air humidity, adopt the electrical heating mode to rise supply air temperature again, then send into indoorly, in order to satisfy human comfort level requirement. However, in this air handling method, on one hand, excessive reduction of the supply air temperature increases the cooling load of the multi-split air conditioning system, which increases power consumption and decreases the refrigeration performance of the system; on the other hand, the electric heating is adopted for heating, and the power consumption is additionally increased.
In order to reduce the power consumption of the multi-split air conditioning system and improve the refrigeration performance of the system, the prior art provides an improvement method, namely, a total heat exchanger is added in an indoor unit part of the multi-split air conditioning system, the total heat exchanger is generally ventilation equipment containing a total heat exchange core body, and the total heat exchange core body is formed by mutually overlapping, bonding and processing mutually perpendicular air channels and total heat exchange paper. The outdoor fresh air and the indoor return air are subjected to heat and mass transfer exchange in the total heat exchanger, so that the purposes of fresh air dehumidification and cooling in summer and fresh air humidification and heating in winter are achieved, the return air heat is recovered through the total heat exchanger, the energy consumption of the system can be effectively reduced, and the refrigeration performance of the system is improved. However, the partial pressure of the water vapor in the outdoor fresh air and the indoor exhaust air of the total heat exchanger has a pressure difference, the water vapor transfers mass between the fresh air and the return air through the moisture permeable paper of the core body, the moisture permeable capacity of the paper inside the core body influences the heat transfer and mass transfer capacity of the total heat exchanger, and meanwhile, the mass transfer capacity and speed of the mode are limited, so that the dehumidification and humidification capacities of the total heat exchanger are limited, the dehumidification and humidification capacities in summer and the humidification capacity in winter are insufficient, and the operation efficiency of the air conditioner is reduced.
Disclosure of Invention
The embodiment of the invention provides a total heat exchanger, which can improve the dehumidification and humidification performances of an air conditioner and improve the operation efficiency of the air conditioner.
The embodiment of the invention also provides a fresh air handling unit system, which can improve the dehumidification and humidification performances of the air conditioner and improve the operation efficiency of the air conditioner.
To achieve the above object, an embodiment of the present invention provides an enthalpy exchanger, including: moisture absorption particles, a refrigerant channel pipe, a shunt pipe and a silk screen, wherein,
the dividing pipes are symmetrically distributed at two ends of the total heat exchanger in the longitudinal direction, the total heat exchanger forms a plurality of refrigerant channel pipes in the longitudinal direction, each refrigerant channel pipe is respectively communicated with the corresponding dividing pipe, each refrigerant channel pipe gap is divided into a plurality of independent spaces in the transverse direction by a silk screen, and moisture absorption particles are filled in each divided independent space in a porous medium mode.
The refrigerant flows into the shunt pipe at one end of the total heat exchanger and sequentially passes through the refrigerant channel pipe and the shunt pipe at the other end of the total heat exchanger to flow out of the total heat exchanger; air enters one end of the total heat exchanger from the transverse direction, flows through the space filled with the moisture absorption particles and flows out of the total heat exchanger from the other end of the total heat exchanger.
The refrigerant channel pipe comprises a micro-channel and a copper pipe.
A fresh air handling unit system based on a total heat exchanger, the fresh air handling unit system comprising: a compressor, a first total heat exchanger, an electronic expansion valve, a second total heat exchanger, a gas-liquid separator, a four-way reversing valve, a first air chamber, a second air chamber, a third air chamber and a fourth air chamber, wherein,
one end of the compressor is connected with the first end of the four-way reversing valve, the other end of the compressor is connected with one end of the gas-liquid separator, the second end of the four-way reversing valve is connected with one end of the first total heat exchanger, the other end of the first total heat exchanger is connected with one end of the electronic expansion valve, the other end of the electronic expansion valve is connected with one end of the second total heat exchanger, the other end of the second total heat exchanger is connected with the third end of the four-way reversing valve, and the fourth end of the four-way reversing valve is connected with the other end of the gas-liquid.
Fresh air enters the first total heat exchanger through the fourth air chamber, enters the first air chamber after heat exchange treatment of the first total heat exchanger, and is sent into the room through the first air chamber;
the return air enters the second total heat exchanger through the third air chamber, enters the second air chamber after heat exchange treatment of the second total heat exchanger, and is discharged into the atmosphere through the second air chamber.
The first total heat exchanger is a condenser, the second total heat exchanger is an evaporator, and the refrigerant enters the four-way reversing valve from the compressor, then enters the condenser, then enters the electronic expansion valve, then enters the evaporator, then enters the four-way reversing valve again, and finally flows back to the compressor through the gas-liquid separator.
And sealing treatment is adopted between the space of the half part of the fresh air handling unit system where the first full heat exchanger is located and the space of the half part of the fresh air handling unit system where the second full heat exchanger is located.
The first air chamber and the third air chamber are positioned at the upper part of the fresh air unit system, the second air chamber and the fourth air chamber are positioned at the lower part of the fresh air unit system, the first air chamber and the second air chamber are sealed, and the third air chamber and the fourth air chamber are sealed.
Further comprising: an indoor air supply channel, an outdoor air exhaust channel, an indoor return air channel and an outdoor fresh air channel, wherein,
outdoor fresh air enters a fourth air chamber through an outdoor fresh air channel, and fresh air output by the first air chamber is sent into the room through an indoor air supply channel;
the indoor return air enters the third air chamber through the indoor return air channel, and the return air output by the second air chamber is discharged into the atmosphere through the outdoor exhaust channel.
The indoor air supply channel and the outdoor air exhaust channel are positioned on the same side of the fresh air unit system, and the indoor return air channel and the outdoor fresh air channel are positioned on the opposite side of the fresh air unit system and the indoor air supply channel.
The first plenum comprises: the first air valve and the second air valve are arranged on the inner side;
the second plenum comprises: the third air valve and the fourth air valve are arranged on the inner side;
the third plenum comprises: the fifth air valve and the sixth air valve are arranged on the inner side;
the fourth plenum comprises: and the seventh air valve and the eighth air valve are arranged on the inner side.
The total heat exchanger includes: moisture absorption particles, a refrigerant channel pipe, a shunt pipe and a silk screen, wherein,
the dividing pipes are symmetrically distributed at two ends of the total heat exchanger in the longitudinal direction, the total heat exchanger forms a plurality of refrigerant channel pipes in the longitudinal direction, each refrigerant channel pipe is respectively communicated with the corresponding dividing pipe, each refrigerant channel pipe gap is divided into a plurality of independent spaces in the transverse direction by a silk screen, and moisture absorption particles are filled in each divided independent space in a porous medium mode.
The refrigerant channel pipe comprises a micro-channel and a copper pipe.
For cooling and dehumidifying in summer, in an initial set time period, the first total heat exchanger is an evaporator, the second total heat exchanger is a condenser, the first air valve, the fourth air valve, the fifth air valve and the eighth air valve are opened, and the second air valve, the third air valve, the sixth air valve and the seventh air valve are closed;
outdoor high-temperature and high-humidity fresh air enters a fourth air chamber through an outdoor fresh air channel and flows through a first total heat exchanger from bottom to top through an eighth air valve, a refrigerant in the first total heat exchanger absorbs fresh air heat, meanwhile, moisture absorption particles absorb water vapor in the fresh air, the fresh air enters the first air chamber through the first air valve after passing through the first total heat exchanger, and the fresh air is sent into the room through an indoor air supply channel;
the indoor low-temperature and low-humidity return air enters a third air chamber through an indoor return air channel, flows through a second total heat exchanger from top to bottom through a fifth air valve, water vapor on moisture-absorbing particles is evaporated and dried under a high-temperature condition, cold energy in the return air is recycled by a condenser, and then the return air enters a second air chamber through a fourth air valve and is discharged into the atmosphere through an outdoor exhaust channel;
when the time period set by the next cycle is up, triggering a four-way reversing valve to reverse, converting the first total heat exchanger into a condenser, converting the second total heat exchanger into an evaporator, triggering the second air valve, the third air valve, the sixth air valve and the seventh air valve to be opened, and closing the first air valve, the fourth air valve, the fifth air valve and the eighth air valve;
outdoor fresh air enters a fourth air chamber through an outdoor fresh air channel and flows through a second total heat exchanger from bottom to top through a seventh air valve, a refrigerant in the second total heat exchanger absorbs fresh air heat, meanwhile, moisture absorption particles absorb water vapor in the fresh air, the fresh air enters the first air chamber through the second air valve after being cooled and dehumidified, and then is sent into a room through an indoor air supply channel;
indoor return air enters a third air chamber through an indoor return air channel and flows through the first total heat exchanger from top to bottom through a sixth air valve, water vapor on moisture absorption particles is evaporated and dried under the high-temperature condition of the condenser, meanwhile, the condenser recovers cold energy in the return air, and then the return air enters a second air chamber through the third air valve and is exhausted into the atmosphere through an outdoor exhaust channel.
For heating and humidifying in winter, in an initial set time period, the first total heat exchanger is an evaporator, the second total heat exchanger is a condenser, the second air valve, the third air valve, the sixth air valve and the seventh air valve are opened, and the first air valve, the fourth air valve, the fifth air valve and the eighth air valve are closed;
outdoor air flows through the second total heat exchanger from bottom to top through the seventh air valve and adsorbs condensed water adsorbed by the moisture absorption particles in the previous circulation process, the refrigerant in the second total heat exchanger releases heat to the flowing air, and the heated and humidified air enters the indoor air supply channel through the second air valve and is further sent into the indoor space;
indoor return air flows through the first total heat exchanger from top to bottom through the sixth air valve, under the low-temperature condition of the first total heat exchanger, moisture absorption particles absorb water vapor in the return air, the refrigerant recovers heat in the return air, the return air subjected to heat exchange and dehumidification enters the outdoor exhaust channel through the third air valve and is exhausted outdoors through the outdoor exhaust channel;
when the time period set by the next cycle is up, triggering a four-way reversing valve to reverse, converting the first total heat exchanger into a condenser, converting the second total heat exchanger into an evaporator, simultaneously triggering the first air valve, the fourth air valve, the fifth air valve and the eighth air valve to be opened, and closing the second air valve, the third air valve, the sixth air valve and the seventh air valve;
outdoor air flows through the first total heat exchanger from bottom to top through the eighth air valve, water vapor adsorbed by the moisture absorption particles in the previous circulation process is adsorbed and heated by the refrigerant in the first total heat exchanger, and the heated and humidified air enters the indoor air supply channel through the first air valve and is sent into the room through the indoor air supply channel;
the indoor return air flows through the second total heat exchanger from top to bottom through the fifth air valve, under the low-temperature condition of the second total heat exchanger, the refrigerant absorbs heat in the return air, meanwhile, the moisture absorption particles absorb water vapor in the return air, and then the return air enters the outdoor exhaust channel through the fourth air valve and is exhausted outdoors through the outdoor exhaust channel.
As can be seen from the above technical solutions, in the total heat exchanger and the fresh air handling unit system provided in the embodiments of the present invention, the total heat exchanger includes: the device comprises moisture absorption particles, refrigerant channel pipes, flow dividing pipes and a silk screen, wherein the flow dividing pipes are symmetrically distributed at two ends of the total heat exchanger in the longitudinal direction, the total heat exchanger forms a plurality of refrigerant channel pipes in the longitudinal direction, each refrigerant channel pipe is respectively communicated with the corresponding flow dividing pipe, gaps of the refrigerant channel pipes are divided into a plurality of independent spaces by the silk screen in the transverse direction, and the moisture absorption particles are filled in the separated independent spaces in a porous medium mode. Fresh air handling unit system includes: the air conditioner comprises a compressor, a first total heat exchanger, an electronic expansion valve, a second total heat exchanger, a gas-liquid separator, a four-way reversing valve, a first air chamber, a second air chamber, a third air chamber and a fourth air chamber, wherein one end of the compressor is connected with the first end of the four-way reversing valve, the other end of the compressor is connected with one end of the gas-liquid separator, the second end of the four-way reversing valve is connected with one end of the first total heat exchanger, the other end of the first total heat exchanger is connected with one end of the electronic expansion valve, the other end of the electronic expansion valve is connected with one end of the second total heat exchanger, the other end of the second total heat exchanger is connected with the third end of the four-way reversing valve, and the fourth end of the. Like this, because moisture absorption granule can absorb the moisture in the high humidity air fast under low temperature environment, under high temperature environment, in time release moisture to low humidity air to promote dehumidification, the humidification performance of air conditioner, retrieve the cold volume in the return air in summer or the heat in the return air in winter simultaneously, improved the operating efficiency of air conditioner.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is to be understood that the drawings in the following description are merely exemplary of the invention and that other embodiments and drawings may be devised by those skilled in the art based on the exemplary embodiments shown in the drawings.
Fig. 1 is a schematic structural diagram of a total heat exchanger according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a fresh air handling unit system according to an embodiment of the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The existing total heat exchanger is used for realizing the dehumidification and cooling of fresh air in summer and the humidification and heating of fresh air in winter through the heat and mass transfer between fresh air and return air through total heat exchange paper. In the embodiment of the invention, the novel total heat exchanger is provided, and the moisture absorption particles are filled in the total heat exchanger, so that the moisture absorption particles can rapidly absorb moisture in high-humidity air in a low-temperature environment, and release the moisture to low-humidity air in a high-temperature environment, the mass transfer capacity and speed of the total heat exchanger are effectively improved, and the system has good dehumidification and humidification capacities.
Meanwhile, on the basis of the total heat exchanger provided by the embodiment of the invention, the fresh air ventilation is carried out indoors, the indoor return air cold quantity (heat) is recovered, and the indoor dehumidification (humidification) is carried out simultaneously, namely, the dehumidification and return air cold quantity recovery function is carried out in summer, and the fresh air fan set system with the humidification and return air heat recovery function is carried out in winter. Like this, fresh air unit system simple structure and combination convenience adopt the heat and mass transfer unit of novel structure, and full heat exchanger promptly through using with other room air conditioners cooperations, retrieves the cold volume or the heat of return air, realizes dehumidification in summer and takes a breath, improves air supply temperature simultaneously, has promoted unit performance, the system energy consumption is low, the operating efficiency is high.
Fig. 1 is a schematic structural diagram of a total heat exchanger according to an embodiment of the present invention. Referring to fig. 1, the total heat exchanger includes: moisture absorption particles (23), a refrigerant channel pipe (24), a shunt pipe (25) and a silk screen (26), wherein,
the shunt tubes (25) are symmetrically distributed at two ends of the total heat exchanger in the longitudinal direction, the total heat exchanger forms a plurality of refrigerant channel tubes (24) in the longitudinal direction, each refrigerant channel tube (24) is respectively communicated with the corresponding shunt tube (25), gaps of the refrigerant channel tubes (24) are divided into a plurality of independent spaces in the transverse direction by silk screens (26), and moisture absorption particles (23) are filled in the divided independent spaces in a porous medium mode.
The refrigerant (27) flows into the shunt pipe (25) at one end of the total heat exchanger, flows into the shunt pipe (25) at the other end through the refrigerant channel pipe (24), and flows out of the total heat exchanger through the shunt pipe (25) at the other end; air (28) enters one end of the total heat exchanger from the transverse direction, flows through the space filled with the hygroscopic particles (23), and exits the total heat exchanger from the other end. In this way, in the total heat exchanger (heat and mass transfer unit), by filling the moisture-absorbing particles therein, air can be absorbed or desorbed by the moisture-absorbing particles while flowing through the porous moisture-absorbing particles.
In the embodiment of the present invention, the refrigerant passage tube (24) is used as a passage for flowing and heat exchanging of the refrigerant, and preferably, a micro-channel or a copper tube may be used, that is, the refrigerant passage tube includes a micro-channel and a copper tube. The heat of the refrigerant in the total heat exchanger can be transferred to the air around the total heat exchanger through the arranged refrigerant channel pipe, or can be transferred to the moisture absorption particles through the refrigerant channel pipe, and then the heat exchange is carried out through the air flowing through the periphery of the moisture absorption particles.
Preferably, the size of the total heat exchanger, the number of the arranged refrigerant channel pipes (24) and the filling quality and porosity of the moisture absorption particles (23) can be comprehensively determined by the heat exchange amount, the moisture removal (heating) amount and the pressure loss of the fresh air handling unit system. For example, if the heat exchange amount and the moisture removal (heating) amount of the fresh air handling unit system are large, the number of the arranged refrigerant channel pipes (24) and/or the filling quality of the moisture absorption particles (23) can be improved, and meanwhile, the size of the heat and mass transfer unit can be properly increased to ensure that the porosity of the moisture absorption particles (23) is not lower than 55 percent so as to avoid overlarge flow pressure loss.
Fig. 2 is a schematic structural diagram of a fresh air handling unit system according to an embodiment of the present invention. Referring to fig. 2, the fresh air handling unit system includes: a compressor (1), a first total heat exchanger (2), an electronic expansion valve (3), a second total heat exchanger (4), a gas-liquid separator (5), a four-way reversing valve (6), a first air chamber (11), a second air chamber (12), a third air chamber (13) and a fourth air chamber (14), wherein,
one end of the compressor (1) is connected with the first end of the four-way reversing valve (6), the other end of the compressor is connected with one end of the gas-liquid separator (5), the second end of the four-way reversing valve (6) is connected with one end of the first total heat exchanger (2), the other end of the first total heat exchanger (2) is connected with one end of the electronic expansion valve (3), the other end of the electronic expansion valve (3) is connected with one end of the second total heat exchanger (4), the other end of the second total heat exchanger (4) is connected with the third end of the four-way reversing valve (6), and the fourth end of the four-way reversing valve (6) is connected with the other end of the gas-liquid separator (5).
In the fresh air handling unit system, the circulation flow of wind is as follows:
fresh air enters the first total heat exchanger (2) through the fourth air chamber (14), enters the first air chamber (11) after heat exchange treatment of the first total heat exchanger (2), and is sent into a room through the first air chamber (11);
the return air enters the second total heat exchanger (4) through the third air chamber (13), enters the second air chamber (12) after the heat exchange treatment of the second total heat exchanger (4), and is discharged into the atmosphere through the second air chamber (12).
In the embodiment of the invention, the first total heat exchanger (2) and the second total heat exchanger (4) are switched between the evaporator and the condenser through the switching of a four-way reversing valve (6):
when refrigerating and dehumidifying in summer, fresh air flows through the evaporator through the fourth air chamber (14), is cooled and dehumidified, and then is sent into a room through the first air chamber (11); the return air flows through the condenser through the third air chamber (13), so that the moisture absorption particles are regenerated, and the cold energy of the return air is recovered and then discharged into the atmosphere through the second air chamber (12);
when heating and humidifying are carried out in winter, fresh air flows through the condenser through the fourth air chamber (14), is heated and humidified and then is sent into a room through the first air chamber (11); the return air flows through the evaporator through the third air chamber (13), absorbs water vapor in the return air, recovers heat and then is discharged into the atmosphere through the second air chamber (12).
The flow process of the refrigerant in the fresh air handling unit system is as follows:
the refrigerant enters a four-way reversing valve (6) from a compressor (1), then enters a condenser (a first total heat exchanger), then enters an electronic expansion valve (3), then enters an evaporator (a second total heat exchanger), then enters the four-way reversing valve (6) again, and finally flows back to the compressor (1) through a gas-liquid separator (5).
In the embodiment of the invention, the space of the half part of the fresh air handling unit system where the first total heat exchanger (2) is located and the space of the half part of the fresh air handling unit system where the second total heat exchanger (4) is located are sealed, namely, air leakage does not occur between the first total heat exchanger (2) and the second total heat exchanger (4).
Preferably, the first air chamber (11) and the third air chamber (13) are positioned at the upper part of the fresh air unit system, the second air chamber (12) and the fourth air chamber (14) are positioned at the lower part of the fresh air unit system, sealing treatment is adopted between the first air chamber (11) and the second air chamber (12), and sealing treatment is adopted between the third air chamber (13) and the fourth air chamber (14). Namely, air leakage does not occur between the first air chamber (11) and the second air chamber (12), and air leakage does not occur between the third air chamber (13) and the fourth air chamber (14).
Preferably, this new fan unit system can also include: an indoor air supply channel (7), an outdoor air exhaust channel (8), an indoor return air channel (9) and an outdoor fresh air channel (10), wherein,
outdoor fresh air enters a fourth air chamber (14) through an outdoor fresh air channel (10), and fresh air output from a first air chamber (11) is sent into a room through an indoor air supply channel (7);
indoor return air enters the third air chamber (13) through the indoor return air channel (9), and return air output from the second air chamber (12) is exhausted into the atmosphere through the outdoor exhaust channel (8).
In the embodiment of the invention, the indoor air supply channel (7) and the outdoor air exhaust channel (8) are positioned at the same side of the fresh air unit system, and the indoor return air channel (9) and the outdoor fresh air channel (10) are positioned at the opposite side of the fresh air unit system and the indoor air supply channel (7).
Wherein,
the first plenum (11) comprises: a first air valve (15) and a second air valve (16) which are arranged on the inner side;
the second plenum (12) comprises: a third air valve (17) and a fourth air valve (18) which are arranged on the inner side;
the third plenum (13) comprises: a fifth air valve (19) and a sixth air valve (20) which are opened on the inner side;
the fourth plenum (14) comprises: and a seventh air damper (21) and an eighth air damper (22) which are opened on the inner side.
In the embodiment of the invention, preferably, the first air valve (15) is parallel to the second air valve (16), the third air valve (17) is parallel to the fourth air valve (18), the fifth air valve (19) is parallel to the sixth air valve (20), and the seventh air valve (21) is parallel to the eighth air valve (22).
That is, the indoor air supply channel (7) is connected with the first air chamber (11), and the inner side of the first air chamber (11) is provided with a first air valve (15) and a second air valve (16); the outdoor exhaust channel (8) is connected with the second air chamber (12), and the inner side of the second air chamber (12) is provided with a third air valve (17) and a fourth air valve (18); the indoor return air channel (9) is connected with a third air chamber (13), and a fifth air valve (19) and a sixth air valve (20) are arranged on the inner side of the third air chamber (13); the outdoor fresh air channel (10) is connected with a fourth air chamber (14), and a seventh air valve (21) and an eighth air valve (22) are arranged on the inner side of the fourth air chamber (14).
The first total heat exchanger has the same structure as the second total heat exchanger, and includes: moisture absorption particles (23), a refrigerant channel pipe (24), a shunt pipe (25) and a silk screen (26), wherein,
the dividing pipes (25) are symmetrically distributed at two ends of the total heat exchanger in the longitudinal direction, the total heat exchanger forms a plurality of refrigerant channel pipes (24) in the longitudinal direction, each refrigerant channel pipe (24) is respectively communicated with the corresponding dividing pipe (25), gaps of the refrigerant channel pipes (24) are divided into a plurality of independent spaces in the transverse direction by a silk screen (26), moisture absorption particles (23) are filled in the divided independent spaces in a porous medium mode, and the refrigerant flows into the dividing pipe (25) at one end of the total heat exchanger, flows out from the dividing pipe (25) at the other end through the refrigerant channel pipes (24), and flows out of the total heat exchanger through the dividing pipe (25) at the other end; air enters one end of the total heat exchanger from the transverse direction, flows through the space filled with the moisture absorbing particles (23), and exits the total heat exchanger from the other end.
Preferably, the refrigerant passage pipe (24) may be a micro-channel or a copper pipe.
In the embodiment of the invention, the four-way reversing valve (6) of the fresh air handling unit system regularly switches the functional states of the first total heat exchanger (2) and the second total heat exchanger (4) according to a preset time period, namely the first total heat exchanger (2) and the second total heat exchanger (4) are regularly switched between an evaporator and a condenser. That is to say, the four-way reversing valve is controlled, so that the two heat and mass transfer units can be switched between the evaporator and the condenser, the continuous operation of the system is realized, meanwhile, the opening and closing of the combined air valve can realize that outdoor fresh air flows through the evaporator through the fourth air chamber during refrigeration and dehumidification in summer, and is sent into the room through the first air chamber after being cooled and dehumidified; indoor return air flows through the condenser through the third air chamber, so that the heat and mass transfer unit regenerates and recovers return air cold energy and then is discharged outdoors through the second air chamber. When heating and humidifying are carried out in winter, outdoor fresh air flows through the condenser through the fourth air chamber, is heated and humidified and then is sent into a room through the first air chamber, indoor return air flows through the evaporator through the third air chamber, water vapor in the return air is absorbed, heat is recovered, and then the heat is discharged into the outside through the second air chamber.
In the heat and mass transfer unit (total heat exchanger), the refrigerant in the refrigerant channel pipe exchanges heat with the air to cool or heat the air; the moisture absorption particles with the porous structures perform mass transfer exchange with water vapor in the air so as to dehumidify or humidify the air.
The working principle of the fresh air handling unit system according to the embodiment of the present invention will be described in detail below.
Cooling and dehumidifying in summer
In an initial set time period, the first total heat exchanger (2) is used as an evaporator, the second total heat exchanger (4) is used as a condenser, the first air valve (15), the fourth air valve (18), the fifth air valve (19) and the eighth air valve (22) are opened, and the second air valve (16), the third air valve (17), the sixth air valve (20) and the seventh air valve (21) are closed.
Outdoor high-temperature and high-humidity fresh air enters a fourth air chamber (14) through an outdoor fresh air channel (10), flows through a first total heat exchanger (2) from bottom to top through an eighth air valve (22), a refrigerant (refrigerant) in the first total heat exchanger (2) absorbs fresh air heat, meanwhile, moisture absorption particles (23) absorb water vapor in the fresh air to dehumidify the fresh air, and the fresh air enters a first air chamber (11) through a first air valve (15) after being cooled and dehumidified by the first total heat exchanger (2) and is sent into the room through an indoor air supply channel (7);
indoor low-temperature and low-humidity return air enters a third air chamber (13) through an indoor return air channel (9), and flows through a second total heat exchanger (4) from top to bottom through a fifth air valve (19), under the high-temperature condition of a condenser, water vapor on moisture absorption particles (23) is evaporated and dried under the high-temperature condition, so that regeneration is realized, the moisture absorption particles (23) have the capacity of absorbing the water vapor again, and when the moisture absorption particles are switched to be used as an evaporator during the time period of next cycle, the moisture vapor is used for absorbing the water vapor in the fresh air, the cold energy in the return air is used for cooling the condenser, the cold energy is recycled by the condenser, and then the return air enters a second air chamber (12) through a fourth air valve (18) and is exhausted into the atmosphere through an outdoor exhaust air channel (.
In the time period, in the first total heat exchanger (2), the moisture absorption particles (23) absorb water vapor in fresh air, the mass is increased, and in the second total heat exchanger (4), the water vapor absorbed by the moisture absorption particles (23) is dried at high temperature, the mass is reduced, and the capacity of absorbing the water vapor is achieved again, so that the regeneration is realized.
When the time period set by the next cycle is up, the four-way reversing valve (6) is triggered to reverse, the connecting passages of the first total heat exchanger (2) and the second total heat exchanger (4) are switched, namely the first total heat exchanger (2) is converted into a condenser, the second total heat exchanger (4) is converted into an evaporator, meanwhile, the second air valve (16), the third air valve (17), the sixth air valve (20) and the seventh air valve (21) are triggered to be opened, and the first air valve (15), the fourth air valve (18), the fifth air valve (19) and the eighth air valve (22) are triggered to be closed.
Outdoor high-temperature and high-humidity fresh air enters a fourth air chamber (14) through an outdoor fresh air channel (10), flows through a second total heat exchanger (4) from bottom to top through a seventh air valve (21), a refrigerant in the second total heat exchanger (4) absorbs fresh air heat, meanwhile, moisture absorption particles (23) absorb water vapor in the fresh air, the fresh air enters a first air chamber (11) through a second air valve (16) after being cooled and dehumidified, and then is sent into a room through an indoor air supply channel (7);
indoor low-temperature and low-humidity return air enters a third air chamber (13) through an indoor return air channel (9), flows through a first total heat exchanger (2) from top to bottom through a sixth air valve (20), under the high-temperature condition of a condenser (the first total heat exchanger), water vapor on moisture absorption particles (23) is evaporated and dried under the high-temperature condition, so that the moisture absorption particles (23) have the capacity of absorbing the water vapor again, the moisture absorption particles (23) are regenerated, meanwhile, the condenser recovers cold energy in the return air, then, the return air enters a second air chamber (12) through a third air valve (17), and is exhausted into the atmosphere through an outdoor exhaust air channel (8).
Thus, when the next time period comes, the four-way reversing valve (6) is triggered again to execute reversing operation, so that the first total heat exchanger (2) is an evaporator, the second total heat exchanger (4) is a condenser, circulation is carried out in such a way, fresh air ventilation is carried out indoors, indoor return air cooling capacity (heat) is recovered, and meanwhile, dehumidification (humidification) is carried out indoors, so that the refrigeration and dehumidification functions are realized, the indoor dehumidification and humidification requirements are met, the system performance of the fresh air handling unit is improved, the system energy consumption of the fresh air handling unit is reduced, and the operating efficiency of the air conditioner is improved; the novel heat and mass transfer unit is compact in structure and high in performance, and is simple in structure and convenient to combine, so that the requirement of a user on comfort is met.
(II) heating and dehumidifying in winter
In an initial set time period, the first total heat exchanger (2) is used as an evaporator, the second total heat exchanger (4) is used as a condenser, the second air valve (16), the third air valve (17), the sixth air valve (20) and the seventh air valve (21) are opened, and the first air valve (15), the fourth air valve (18), the fifth air valve (19) and the eighth air valve (22) are closed.
Outdoor air flows through the second total heat exchanger (4) from bottom to top through the seventh air valve (21), condensed water adsorbed by the moisture absorption particles (23) in the second total heat exchanger (4) in the previous cycle process is adsorbed, so that the moisture absorption particles (23) have the capacity of absorbing water vapor again, and then are regenerated, the refrigerant in the second total heat exchanger (4) releases heat to the flowing air, and the heated and humidified air enters the indoor air supply channel (7) through the second air valve (16) and then is sent into the indoor;
indoor return air flows through the first total heat exchanger (2) from top to bottom through the sixth air valve (20), under the low-temperature condition of the first total heat exchanger (evaporator), moisture absorption particles (23) absorb water vapor in the return air, a refrigerant recovers heat in the return air, the return air subjected to heat exchange and dehumidification enters the outdoor air exhaust channel (8) through the third air valve (17) and is exhausted outdoors through the outdoor air exhaust channel (8).
In the time period, in the first total heat exchanger (2), the moisture absorption particles (23) absorb water vapor in return air, the mass is increased, and in the second total heat exchanger (4), the water vapor absorbed by the moisture absorption particles (23) is absorbed by low-humidity air, the mass is reduced, and the capacity of absorbing the water vapor is restored, so that the regeneration is realized.
When the time period set by the next cycle is up, the four-way reversing valve (6) is triggered to reverse, the first total heat exchanger (2) is converted into a condenser, the second total heat exchanger (4) is converted into an evaporator, meanwhile, the first air valve (15), the fourth air valve (18), the fifth air valve (19) and the eighth air valve (22) are triggered to be opened, and the second air valve (16), the third air valve (17), the sixth air valve (20) and the seventh air valve (21) are triggered to be closed.
Outdoor air flows through the first total heat exchanger (2) from bottom to top through the eighth air valve (22) and adsorbs water vapor adsorbed by the moisture absorption particles (23) in the first total heat exchanger (2) in the previous cycle process, so that the moisture absorption particles (23) have the capacity of absorbing water vapor again and are regenerated; meanwhile, the air is heated by the refrigerant in the first total heat exchanger (2), and the heated and humidified air enters the indoor air supply channel (7) through the first air valve (15) and is sent into the room through the indoor air supply channel (7);
indoor return air flows through the second total heat exchanger (4) from top to bottom through the fifth air valve (19), under the low-temperature condition of the second total heat exchanger (evaporator), the refrigerant in the evaporator absorbs heat in the return air, meanwhile, the moisture absorption particles (23) absorb water vapor in the return air, and then the return air enters the outdoor exhaust channel (8) through the fourth air valve (18) and is exhausted to the outside through the outdoor exhaust channel (8).
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also encompasses these modifications and variations.
Claims (14)
1. An enthalpy exchanger, comprising: moisture absorption particles, a refrigerant channel pipe, a shunt pipe and a silk screen, wherein,
the flow dividing pipes are symmetrically distributed at two ends of the total heat exchanger in the longitudinal direction, the total heat exchanger forms a plurality of refrigerant channel pipes in the longitudinal direction, each refrigerant channel pipe is respectively communicated with the corresponding flow dividing pipe, each refrigerant channel pipe gap is divided into a plurality of independent spaces in the transverse direction by a silk screen, and moisture absorption particles are filled in the divided independent spaces in a porous medium mode; air enters one end of the total heat exchanger from the transverse direction, flows through the space filled with the moisture absorption particles and flows out of the total heat exchanger from the other end of the total heat exchanger.
2. The total heat exchanger according to claim 1,
the refrigerant flows into the shunt pipe at one end of the total heat exchanger and flows out of the total heat exchanger through the refrigerant channel pipe and the shunt pipe at the other end of the total heat exchanger in sequence.
3. The total heat exchanger according to claim 1, wherein the refrigerant passage tube comprises a micro-channel and a copper tube.
4. A fresh air handling unit system based on a total heat exchanger is characterized in that the fresh air handling unit system comprises: a compressor, a first total heat exchanger, an electronic expansion valve, a second total heat exchanger, a gas-liquid separator, a four-way reversing valve, a first air chamber, a second air chamber, a third air chamber and a fourth air chamber, wherein,
one end of a compressor is connected with the first end of a four-way reversing valve, the other end of the compressor is connected with one end of a gas-liquid separator, the second end of the four-way reversing valve is connected with one end of a first total heat exchanger, the other end of the first total heat exchanger is connected with one end of an electronic expansion valve, the other end of the electronic expansion valve is connected with one end of a second total heat exchanger, the other end of the second total heat exchanger is connected with the third end of the four-way reversing valve, and the fourth end of the four-way reversing valve is connected with the other end of the gas-liquid;
the first and second total heat exchangers include: moisture absorption particles, a refrigerant channel pipe, a shunt pipe and a silk screen, wherein,
the flow dividing pipes are symmetrically distributed at two ends of the total heat exchanger in the longitudinal direction, the total heat exchanger forms a plurality of refrigerant channel pipes in the longitudinal direction, each refrigerant channel pipe is respectively communicated with the corresponding flow dividing pipe, each refrigerant channel pipe gap is divided into a plurality of independent spaces in the transverse direction by a silk screen, and moisture absorption particles are filled in the divided independent spaces in a porous medium mode; air enters one end of the total heat exchanger from the transverse direction, flows through the space filled with the moisture absorption particles and flows out of the total heat exchanger from the other end of the total heat exchanger.
5. Fresh air handling unit system according to claim 4,
fresh air enters the first total heat exchanger through the fourth air chamber, enters the first air chamber after heat exchange treatment of the first total heat exchanger, and is sent into the room through the first air chamber;
the return air enters the second total heat exchanger through the third air chamber, enters the second air chamber after heat exchange treatment of the second total heat exchanger, and is discharged into the atmosphere through the second air chamber.
6. Fresh air handling unit system according to claim 5,
the first total heat exchanger is a condenser, the second total heat exchanger is an evaporator, and the refrigerant enters the four-way reversing valve from the compressor, then enters the condenser, then enters the electronic expansion valve, then enters the evaporator, then enters the four-way reversing valve again, and finally flows back to the compressor through the gas-liquid separator.
7. The fresh air handling unit system according to any one of claims 4 to 6, wherein a seal is provided between the fresh air handling unit system half space where the first total heat exchanger is located and the fresh air handling unit system half space where the second total heat exchanger is located.
8. The fresh air handling unit system of claim 7, wherein the first air chamber and the third air chamber are located at an upper portion of the fresh air handling unit system, the second air chamber and the fourth air chamber are located at a lower portion of the fresh air handling unit system, the first air chamber and the second air chamber are sealed, and the third air chamber and the fourth air chamber are sealed.
9. The fresh air handling unit system of claim 8, further comprising: an indoor air supply channel, an outdoor air exhaust channel, an indoor return air channel and an outdoor fresh air channel, wherein,
outdoor fresh air enters a fourth air chamber through an outdoor fresh air channel, and fresh air output by the first air chamber is sent into the room through an indoor air supply channel;
the indoor return air enters the third air chamber through the indoor return air channel, and the return air output by the second air chamber is discharged into the atmosphere through the outdoor exhaust channel.
10. The fresh air handling unit system of claim 9, wherein the indoor supply air channel and the outdoor exhaust air channel are located on a same side of the fresh air handling unit system, and the indoor return air channel and the outdoor fresh air channel are located on a side of the fresh air handling unit system opposite to the indoor supply air channel.
11. Fresh air handling unit system according to claim 10,
the first plenum comprises: the first air valve and the second air valve are arranged on the inner side;
the second plenum comprises: the third air valve and the fourth air valve are arranged on the inner side;
the third plenum comprises: the fifth air valve and the sixth air valve are arranged on the inner side;
the fourth plenum comprises: and the seventh air valve and the eighth air valve are arranged on the inner side.
12. The fresh air handling unit system of claim 11 wherein the refrigerant channel tube comprises a microchannel and a copper tube.
13. The fresh air handling unit system of claim 12,
for cooling and dehumidifying in summer, in an initial set time period, the first total heat exchanger is an evaporator, the second total heat exchanger is a condenser, the first air valve, the fourth air valve, the fifth air valve and the eighth air valve are opened, and the second air valve, the third air valve, the sixth air valve and the seventh air valve are closed;
outdoor high-temperature and high-humidity fresh air enters a fourth air chamber through an outdoor fresh air channel and flows through a first total heat exchanger from bottom to top through an eighth air valve, a refrigerant in the first total heat exchanger absorbs fresh air heat, meanwhile, moisture absorption particles absorb water vapor in the fresh air, the fresh air enters the first air chamber through the first air valve after passing through the first total heat exchanger, and the fresh air is sent into the room through an indoor air supply channel;
the indoor low-temperature and low-humidity return air enters a third air chamber through an indoor return air channel, flows through a second total heat exchanger from top to bottom through a fifth air valve, water vapor on moisture-absorbing particles is evaporated and dried under a high-temperature condition, cold energy in the return air is recycled by a condenser, and then the return air enters a second air chamber through a fourth air valve and is discharged into the atmosphere through an outdoor exhaust channel;
when the time period set by the next cycle is up, triggering a four-way reversing valve to reverse, converting the first total heat exchanger into a condenser, converting the second total heat exchanger into an evaporator, triggering the second air valve, the third air valve, the sixth air valve and the seventh air valve to be opened, and closing the first air valve, the fourth air valve, the fifth air valve and the eighth air valve;
outdoor high-temperature and high-humidity fresh air enters a fourth air chamber through an outdoor fresh air channel, flows through a second total heat exchanger from bottom to top through a seventh air valve, a refrigerant in the second total heat exchanger absorbs fresh air heat, meanwhile, moisture absorption particles absorb water vapor in the fresh air, the fresh air enters the first air chamber through the second air valve after being cooled and dehumidified, and then is sent into a room through an indoor air supply channel;
the indoor low-temperature and low-humidity return air enters the third air chamber through the indoor return air channel, flows through the first total heat exchanger from top to bottom through the sixth air valve, water vapor on moisture absorption particles is evaporated and dried under the high-temperature condition of the condenser, meanwhile, the condenser recovers cold energy in the return air, and then the return air enters the second air chamber through the third air valve and is discharged into the atmosphere through the outdoor exhaust channel.
14. The fresh air handling unit system of claim 12,
for heating and humidifying in winter, in an initial set time period, the first total heat exchanger is an evaporator, the second total heat exchanger is a condenser, the second air valve, the third air valve, the sixth air valve and the seventh air valve are opened, and the first air valve, the fourth air valve, the fifth air valve and the eighth air valve are closed;
outdoor air flows through the second total heat exchanger from bottom to top through the seventh air valve and adsorbs condensed water adsorbed by the moisture absorption particles in the previous circulation process, the refrigerant in the second total heat exchanger releases heat to the flowing air, and the heated and humidified air enters the indoor air supply channel through the second air valve and is further sent into the indoor space;
indoor return air flows through the first total heat exchanger from top to bottom through the sixth air valve, under the low-temperature condition of the first total heat exchanger, moisture absorption particles absorb water vapor in the return air, the refrigerant recovers heat in the return air, the return air subjected to heat exchange and dehumidification enters the outdoor exhaust channel through the third air valve and is exhausted outdoors through the outdoor exhaust channel;
when the time period set by the next cycle is up, triggering a four-way reversing valve to reverse, converting the first total heat exchanger into a condenser, converting the second total heat exchanger into an evaporator, simultaneously triggering the first air valve, the fourth air valve, the fifth air valve and the eighth air valve to be opened, and closing the second air valve, the third air valve, the sixth air valve and the seventh air valve;
outdoor air flows through the first total heat exchanger from bottom to top through the eighth air valve, water vapor adsorbed by the moisture absorption particles in the previous circulation process is adsorbed and heated by the refrigerant in the first total heat exchanger, and the heated and humidified air enters the indoor air supply channel through the first air valve and is sent into the room through the indoor air supply channel;
the indoor return air flows through the second total heat exchanger from top to bottom through the fifth air valve, under the low-temperature condition of the second total heat exchanger, the refrigerant absorbs heat in the return air, meanwhile, the moisture absorption particles absorb water vapor in the return air, and then the return air enters the outdoor exhaust channel through the fourth air valve and is exhausted outdoors through the outdoor exhaust channel.
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| CN105423793A (en) * | 2015-12-22 | 2016-03-23 | 叶立英 | Method and system for efficient total heat recovery and for compounding total heat recovery system with external heat energy system |
| CN106322538A (en) * | 2016-10-31 | 2017-01-11 | 广东美的制冷设备有限公司 | Water-free humidifying air conditioner and humidifying method |
| CN106322537A (en) * | 2016-10-31 | 2017-01-11 | 广东美的制冷设备有限公司 | Waterfree humidification air conditioner and humidification method |
| CN106989473B (en) * | 2017-05-19 | 2023-06-20 | 珠海格力电器股份有限公司 | Fresh air system |
| CN109186015A (en) * | 2018-08-13 | 2019-01-11 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
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| CN2297703Y (en) * | 1998-05-15 | 1998-11-18 | 诠旭电机股份有限公司 | evaporative heat exchanger |
| CN101900384A (en) * | 2010-05-21 | 2010-12-01 | 南通华信中央空调有限公司 | Exhaust air heat recovery fresh air unit equipped with moisture absorption heat exchangers |
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| JP2008281281A (en) * | 2007-05-11 | 2008-11-20 | Japan Exlan Co Ltd | Sorption module and its manufacturing method |
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| CN2297703Y (en) * | 1998-05-15 | 1998-11-18 | 诠旭电机股份有限公司 | evaporative heat exchanger |
| CN101900384A (en) * | 2010-05-21 | 2010-12-01 | 南通华信中央空调有限公司 | Exhaust air heat recovery fresh air unit equipped with moisture absorption heat exchangers |
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