CN216281897U - Fresh air equipment - Google Patents

Fresh air equipment Download PDF

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Publication number
CN216281897U
CN216281897U CN202122922745.1U CN202122922745U CN216281897U CN 216281897 U CN216281897 U CN 216281897U CN 202122922745 U CN202122922745 U CN 202122922745U CN 216281897 U CN216281897 U CN 216281897U
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Prior art keywords
fresh air
heat exchange
heat exchanger
exchange system
heat
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CN202122922745.1U
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徐振坤
李金波
杜顺开
黄剑云
高卓贤
刘步东
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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Abstract

The utility model provides fresh air equipment which comprises a shell, a first heat exchange system and a second heat exchange system, wherein the shell is provided with a fresh air channel and an air exhaust channel; the first heat exchange system is used for exchanging heat between the fresh air channel and the external environment; the second heat exchange system is used for exchanging heat between the fresh air channel and the exhaust channel; a plurality of fresh air heat exchangers are arranged in the fresh air channel, at least one fresh air heat exchanger is arranged on a refrigerant flow path of the first heat exchange system, and at least one fresh air heat exchanger is arranged on a refrigerant flow path of the second heat exchange system. In the scheme, when the fresh air machine equipment is in a refrigeration mode, a heating mode and a dehumidification mode, the fresh air heat exchanger in the first heat exchange system and the fresh air heat exchanger in the second heat exchange system can form two refrigerant cycles with low pressure ratio, so that high-efficiency operation is realized; meanwhile, heat exchange is carried out between the first heat exchange system and the external environment and between the second heat exchange system and the exhaust channel, so that the aims of meeting the heating and temperature regulation requirements and achieving high efficiency and energy conservation are fulfilled.

Description

Fresh air equipment
Technical Field
The utility model relates to the technical field of fresh air equipment, in particular to fresh air equipment.
Background
Nowadays, with the improvement of life quality, the requirement on indoor heat environment is no longer only cold and hot, and the requirement on health is raised, higher requirements on freshness and cleanliness are provided, and fresh air is increasingly applied as an effective and important solution.
The traditional room air conditioner is only filtered and then directly sent into the room due to the limit of price installation and size, and the air conditioner bears the load. On the other hand, the development of building energy conservation is better and better, ultra-low energy consumption buildings are increased day by day, and the fresh air fan is used as an indoor key environment treatment device, so that the fresh air is not only clean, but also the temperature and humidity of the fresh air need to be treated. No matter which type of fresh air equipment is, the heat and humidity treatment of fresh air is newly added on the basis of the original indoor heat and humidity environment treatment, and the energy consumption is increased. Therefore, some solutions for saving fresh air and energy appear in the development stage of the fresh air fan, and the existing mature product schemes mainly comprise total heat exchange recovery, heat pump reheating recovery, double-cold-source precooling dehumidification separation and the like.
However, the total heat exchange recovery can realize the recovery of heat and humidity, but has the problems of large processing difficulty, large size, large wind resistance, easy filth blockage, easy freezing in winter, large fan energy consumption, high cost and limited efficiency by indoor and outdoor temperature difference. The heat pump reheating recovery can improve the heat pump efficiency, but is only efficient when refrigerating and dehumidifying, and most of the heat pump reheating recovery is only one-level reheating recovery, the fresh air temperature regulation capacity is limited, and the dehumidification and energy conservation can not be simultaneously considered. The double-cold-source precooling and dehumidifying separation can improve energy waste of refrigeration and dehumidification, but the fresh air temperature adjusting capacity is limited, the water cooling scheme of the double-cold-source precooling and dehumidifying separation has heat loss of secondary heat exchange and waste of cooling heat, only the processing efficiency of fresh air is improved, and the energy consumption is transferred to a refrigerating unit.
The above schemes can not well give consideration to the requirements of heating and temperature regulation, electric auxiliary heating is adopted for heating in winter, or partial heating is matched with total heat exchange for use, but the problem that the total heat exchanger freezes in low-temperature and high-humidity conditions still needs to be solved, so that the winter efficiency is low.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a fresh air device, and aims to solve the technical problems that the fresh air device in the prior art cannot well meet the heating and temperature regulation requirements and is low in efficiency.
In order to achieve the above object, the present invention provides a fresh air device, including:
the air purifier comprises a shell, wherein the shell is provided with a fresh air channel and an exhaust air channel;
the first heat exchange system is used for exchanging heat between the fresh air channel and the external environment; and the number of the first and second groups,
the second heat exchange system is used for exchanging heat between the fresh air channel and the exhaust channel;
the fresh air channel is internally provided with a plurality of fresh air heat exchangers, at least one of the fresh air heat exchangers is positioned on the refrigerant flow path of the first heat exchange system, and at least one of the fresh air heat exchangers is positioned on the refrigerant flow path of the second heat exchange system.
Optionally, at least two fresh air heat exchangers are arranged on a refrigerant flow path of the first heat exchange system; and/or the presence of a gas in the gas,
and the at least two fresh air heat exchangers are arranged on a refrigerant flow path of the second heat exchange system.
Optionally, in the fresh air channel, in an indoor direction from an outdoor side to an indoor side, at least two fresh air heat exchangers arranged on the refrigerant flow path of the first heat exchange system and at least two fresh air heat exchangers arranged on the refrigerant flow path of the second heat exchange system are alternately arranged in sequence.
Optionally, a first refrigerant flow path is formed on the first heat exchange system, and the first heat exchange system includes a first compressor, a first four-way valve, an outdoor heat exchanger and a first throttling element, which are arranged on the first refrigerant flow path and connected in sequence;
the first refrigerant flow path is provided with two fresh air heat exchangers, a second throttling element is arranged between the two fresh air heat exchangers, and the two fresh air heat exchangers comprise a first fresh air heat exchanger and a second fresh air heat exchanger;
in the fresh air channel, the first fresh air heat exchanger is positioned on one side of the second fresh air heat exchanger, which is far away from the air inlet of the fresh air channel;
on the first refrigerant flow path, the first throttling element, the first fresh air heat exchanger, the second throttling element, the second fresh air heat exchanger and the first four-way valve are connected in sequence.
Optionally, the heat exchange area of the outdoor heat exchanger is S1, the heat exchange area of the first fresh air heat exchanger is S2, and S2/S1 is less than or equal to 0.5.
Optionally, the fresh air device further comprises an outdoor fan, and the outdoor fan is arranged corresponding to the outdoor heat exchanger.
Optionally, a second refrigerant flow path is formed on the second heat exchange system, and the second heat exchange system includes a second compressor, a second four-way valve, an exhaust heat exchanger and a third throttling element, which are arranged on the second refrigerant flow path and connected in sequence;
the second refrigerant flow path is provided with two fresh air heat exchangers, a fourth throttling element is arranged between the two fresh air heat exchangers, and the two fresh air heat exchangers comprise a third fresh air heat exchanger and a fourth fresh air heat exchanger;
in the fresh air channel, the third fresh air heat exchanger is positioned on one side of the fourth fresh air heat exchanger, which is far away from the air inlet of the fresh air channel;
and on the second refrigerant flow path, the third throttling element, the third fresh air heat exchanger, the fourth throttling element, the fourth fresh air heat exchanger and the second four-way valve are sequentially connected.
Optionally, the heat exchange area of the exhaust heat exchanger is S4, the heat exchange area of the third fresh air heat exchanger is S5, and S5/S4 is less than or equal to 1.5.
Optionally, the fresh air device includes an integrated compressor, two separated compression parts are formed in the integrated compressor, each compression part includes a compression cavity, and an air return port and an air exhaust port communicated with the compression cavity, airflow can be sucked from the corresponding air return port in the two compression cavities, and after being compressed, the airflow is exhausted from the corresponding air exhaust port;
the two compression parts are respectively and correspondingly arranged on the refrigerant flow path of the first heat exchange system and the refrigerant flow path of the second heat exchange system.
Optionally, the fresh air channel is provided with a fresh air inlet and a fresh air outlet;
the fresh air device further comprises a fresh air fan, and the fresh air fan is arranged in the fresh air channel and is adjacent to the fresh air outlet.
Optionally, the exhaust channel is provided with an exhaust inlet and an exhaust outlet;
the fresh air equipment further comprises an air exhaust fan, and the air exhaust fan is arranged in the air exhaust channel and is close to the air exhaust outlet.
The fresh air equipment provided by the utility model comprises a shell, a first heat exchange system and a second heat exchange system, wherein the shell is provided with a fresh air channel and an air exhaust channel; the first heat exchange system is used for exchanging heat between the fresh air channel and the external environment; the second heat exchange system is used for exchanging heat between the fresh air channel and the exhaust channel; the fresh air channel is internally provided with a plurality of fresh air heat exchangers, at least one of the fresh air heat exchangers is positioned on the refrigerant flow path of the first heat exchange system, and at least one of the fresh air heat exchangers is positioned on the refrigerant flow path of the second heat exchange system. In the scheme, when the fresh air fan equipment is in a refrigeration mode, a heating mode and a dehumidification mode, the fresh air heat exchanger in the first heat exchange system and the fresh air heat exchanger in the second heat exchange system can form two refrigerant cycles with low pressure ratio, so that high-efficiency operation is realized; meanwhile, the first heat exchange system and the external environment are used for heat exchange, and the second heat exchange system and the exhaust channel are used for heat exchange, so that the aims of meeting the heating and temperature regulation requirements and achieving high efficiency and energy conservation are fulfilled.
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 obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first embodiment of a fresh air device provided by the present invention;
FIG. 2 is a schematic structural view of the fresh air duct of FIG. 1;
fig. 3 is a schematic structural diagram of a second embodiment of the fresh air device provided by the present invention;
fig. 4 is a schematic structural diagram at a in fig. 3.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.
It should be noted that, if directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. Also, the technical solutions in the embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.
The existing fresh air equipment cannot well meet the requirements of heating and temperature regulation, electric auxiliary heating is adopted for warming in winter or part of the fresh air equipment is matched with total heat exchange for use, but the problem that the total heat exchanger freezes in low-temperature and high-humidity conditions still needs to be solved, so that the efficiency in winter is very low.
In view of this, the utility model provides a fresh air device, and aims to solve the technical problems that the fresh air device in the prior art cannot well meet the requirements of heating and temperature regulation and is low in efficiency. Fig. 1 to fig. 4 show an embodiment of a fresh air device according to the present invention.
Referring to fig. 1 and fig. 2, a fresh air device 100 provided by the present invention includes a housing, a first heat exchange system 3 and a second heat exchange system 4, wherein the housing is provided with a fresh air channel 1 and an air exhaust channel 2; the first heat exchange system 3 is used for exchanging heat between the fresh air channel 1 and the external environment; the second heat exchange system 4 is used for exchanging heat between the fresh air channel 1 and the exhaust air channel 2; a plurality of fresh air heat exchangers are arranged in the fresh air channel 1, at least one of the fresh air heat exchangers is positioned on the refrigerant flow path of the first heat exchange system 3, and at least one of the fresh air heat exchangers is positioned on the refrigerant flow path of the second heat exchange system 4. In the scheme, when the fresh air fan equipment is in a refrigeration mode, a heating mode and a dehumidification mode, the fresh air heat exchanger in the first heat exchange system 3 and the fresh air heat exchanger in the second heat exchange system 4 can form two refrigerant cycles with low pressure ratio, so that high-efficiency operation is realized; meanwhile, the first heat exchange system 3 is used for exchanging heat with the external environment, and the second heat exchange system 4 is used for exchanging heat with the exhaust channel 2, so that the purposes of meeting the heating and temperature regulation requirements and achieving high efficiency and energy conservation are achieved.
It should be noted that the heat exchanger in this embodiment is a device for exchanging heat between a refrigerant and air, and cools, dehumidifies, or heats and reheats the air through the refrigerant with different temperatures.
In addition, the first heat exchange system 3 is a refrigeration cycle system for cooling and reheating fresh air, absorbs heat and cools through a precooling heat exchanger, and then reheats dehumidified air through supercooling. The second heat exchange system 4 is used for a refrigeration cycle system for fresh air dehumidification and reheating, absorbs heat and dehumidifies through the dehumidification heat exchanger, and reheats dehumidified air through condensation.
It should be understood that pre-cooling refers to a process of cooling or dehumidifying air by a refrigerant which is lower than the temperature of air before flowing through the heat exchanger. Dehumidification, which is a process of cooling and dehumidifying air when the temperature of the refrigerant is lower than the dew point temperature of the air before flowing through the heat exchanger. Reheating refers to a process in which the temperature of the refrigerant is higher than that of air before flowing through the heat exchanger, and the air is heated and reheated. The condensation reheating refers to a treatment process of heating and reheating air by high-temperature gaseous state, gas-liquid two-phase or liquid refrigerant.
Further, the number of the fresh air heat exchangers of the first heat exchange system 3 and the second heat exchange system 4 is not limited. In this embodiment, at least two of the fresh air heat exchangers are disposed on the refrigerant flow path of the first heat exchange system 3; and/or at least two fresh air heat exchangers are arranged on a refrigerant flow path of the second heat exchange system 4.
The relative position of the fresh air heat exchange gas in the first heat exchange system 3 and the second heat exchange system 4 is not limited. In this embodiment, in order to improve the operation efficiency of the fresh air setting, in the fresh air channel 1, from the outdoor direction to the indoor direction, at least two fresh air heat exchangers disposed on the refrigerant flow path of the first heat exchange system 3 and at least two fresh air heat exchangers disposed on the refrigerant flow path of the second heat exchange system 4 are alternately disposed in sequence.
Further, a first refrigerant flow path is formed on the first heat exchange system 3, and the first heat exchange system 3 includes a first compressor 31, a first four-way valve 32, an outdoor heat exchanger 33, and a first throttling element 34, which are arranged on the first refrigerant flow path and sequentially connected; the first refrigerant flow path is provided with two fresh air heat exchangers, a second throttling element 35 is arranged between the two fresh air heat exchangers, and the two fresh air heat exchangers comprise a first fresh air heat exchanger 11 and a second fresh air heat exchanger 12; in the fresh air channel, the first fresh air heat exchanger 11 is positioned on one side of the second fresh air heat exchanger 12, which is far away from the air inlet of the fresh air channel 1; on the first refrigerant flow path, the first throttling element 34, the first fresh air heat exchanger 11, the second throttling element 35, the second fresh air heat exchanger 12, and the first four-way valve 32 are connected in sequence.
It can be understood that, the first heat exchange system 3 forms a direct expansion type air source heat pump system, the refrigerant directly expands for refrigeration and exchanges heat with air, secondary heat exchange is not needed to be carried out through the refrigerant, and refrigeration energy efficiency is improved. In addition, the first fresh air heat exchanger 11 and the second fresh air heat exchanger 12 may be disposed near an air inlet of the fresh air channel 1, or may be disposed near an air outlet of the fresh air channel 1, which is not limited herein. It should be noted that, here, the air inlet of the fresh air channel 1 is a fresh air inlet 1a, and the air outlet of the fresh air channel 1 is a fresh air outlet 1 b.
Further, in order to ensure different outlet air temperatures and energy saving requirements, the heat exchange area of the outdoor heat exchanger 33 is S1, the heat exchange area of the first fresh air heat exchanger 11 is S2, and S2/S1 is not more than 0.5.
Further, the fresh air device 100 further includes an outdoor fan 331, and the outdoor fan 331 is disposed corresponding to the outdoor heat exchanger 33. The outdoor fan 331 is utilized to improve the heat dissipation capability of the outdoor heat exchanger 33.
Further, a second refrigerant flow path is formed on the second heat exchange system 4, and the second heat exchange system 4 includes a second compressor 41, a second four-way valve 42, an exhaust heat exchanger 21, and a third throttling element 43, which are arranged on the second refrigerant flow path and sequentially connected; the second refrigerant flow path is provided with two fresh air heat exchangers, a fourth throttling element 44 is arranged between the two fresh air heat exchangers, and the two fresh air heat exchangers comprise a third fresh air heat exchanger 13 and a fourth fresh air heat exchanger 14; in the fresh air channel, the third fresh air heat exchanger 13 is positioned on one side of the fourth fresh air heat exchanger 14 departing from the air inlet of the fresh air channel 1; in the second refrigerant flow path, the third throttling element 43, the third fresh air heat exchanger 13, the fourth throttling element 44, the fourth fresh air heat exchanger 14, and the second four-way valve 42 are connected in sequence.
It can be understood that the third fresh air heat exchanger 13 and the fourth fresh air heat exchanger 14 may be disposed near an air inlet of the fresh air channel 1, and may also be disposed near an air outlet of the fresh air channel 1, which is not limited herein. It should be noted that, here, the air inlet of the fresh air channel 1 is a fresh air inlet 1a, and the air outlet of the fresh air channel 1 is a fresh air outlet 1 b.
Further, the heat exchange area of the exhaust air heat exchanger 21 is S4, the heat exchange area of the third fresh air heat exchanger 13 is S5, and S5/S4 is less than or equal to 1.5.
It should be noted that the fresh air device may also include more or less components than those shown, or some components may be combined to obtain different component arrangements, for example: more stages of heat exchange systems are arranged in the fresh air device 100 or the number of heat exchangers in each heat exchange system is increased.
In an embodiment, the first heat exchange system 3 and the second heat exchange system 4 are provided at the same time, and a bidirectional flow direct expansion type double heat pump heat recovery and a double reheat supercooling system structural form are configured to form 2 sets of direct expansion type air source heat pump cycles, so that the fresh air device 100 has two sets of different condensation temperatures and evaporation temperatures. On the basis of the system structure, aiming at the energy-saving requirements of the all-year-round refrigeration and heating operation of fresh air, the exhaust sensible heat recovery and the supercooling reheating recovery in the refrigeration mode, the exhaust total heat recovery in the heating mode and the dehumidification reheating recovery in the dehumidification mode can be realized by switching the four-way valve and controlling the throttling component.
The fresh air heat exchangers of the first heat exchange system 3 and the second heat exchange system 4 are alternately arranged in the fresh air channel 1 to respectively realize condensation heat recovery and reheating recovery, the system supercooling degree of the first heat exchange system 3 and the second heat exchange system 4 is improved, reheating and supercooling adjustment under multiple working conditions all the year around is realized by matching with a throttling component, so that the two systems are operated at a low pressure ratio, the operation energy efficiency of the fresh air system all the year around is improved, the air outlet temperature requirements in different seasons all the year around can be realized by adjusting the operation mode combination of the two systems and controlling the opening degree of the throttling component, and the comfort level of fresh air control is improved.
For example: if the fresh air temperature is 20 ℃ and the moisture content is 14g/kg, the user sets reheating dehumidification at the moment, sets the temperature to be 25 ℃ and the moisture content to be 10g/kg, wherein the second fresh air heat exchanger 12 cools the fresh air to 15 ℃, the fourth heat exchanger cools the fresh air to 10 ℃, the first fresh air heat exchanger 11 heats fresh air to 12 ℃ (the area ratio of the first fresh air heat exchanger 11 to the outdoor heat exchanger 33 is set to be 5%, supercooling is increased by using supercooled liquid refrigerant reheating), the third fresh air heat exchanger 13 heats fresh air to 28 ℃ (the area ratio of the third fresh air heat exchanger 13 to the exhaust air heat exchanger 21 is set to be 100%, the outlet air temperature is adjusted by using two-phase refrigerant reheating, and the reheating quantity is increased by reducing the rotating speed of the exhaust air fan 22 or increasing the rotating speed of the first compressor 31), so that the indoor requirement for dehumidification and reheating is met.
For another example: if the fresh air temperature is 35 ℃ and the moisture content is 21g/kg, the user sets reheating dehumidification at the moment, sets the temperature to be 25 ℃ and the moisture content to be 10g/kg, wherein the second fresh air heat exchanger 12 cools the fresh air to 20 ℃, the fourth fresh air heat exchanger 14 cools the fresh air to 10 ℃, the first fresh air heat exchanger 11 heats fresh air to 15 ℃ (the area ratio of the first fresh air heat exchanger 11 to the outdoor heat exchanger 33 is set to be 5%, supercooling is increased by using supercooled liquid refrigerant, the third fresh air heat exchanger 13 heats fresh air to 22 ℃ (the area ratio of the third fresh air heat exchanger 13 to the exhaust heat exchanger 21 is set to be 100%, the outlet air temperature is adjusted by using two-phase refrigerant reheating, and the reheating quantity is reduced by increasing the rotating speed of the exhaust air fan 22 or reducing the rotating speed of the first compressor 31), so that the indoor requirement for dehumidification and reheating is met.
Further, referring to fig. 3 and 4, in order to improve the integration of the fresh air device 100 and reduce the volume, the fresh air device 100 includes an integrated compressor 5, two separated compression parts are formed in the integrated compressor 5, each compression part includes a compression cavity, and an air return port and an air exhaust port communicated with the compression cavity, and air flow can be sucked from the corresponding air return port in both the compression cavities and exhausted from the corresponding air exhaust port after being compressed; the two compression parts are respectively and correspondingly arranged on a refrigerant flow path of the first heat exchange system 3 and a refrigerant flow path of the second heat exchange system 4.
Further, in order to improve the air inlet efficiency of the fresh air channel 1, the fresh air channel 1 is provided with a fresh air inlet 1a and a fresh air outlet 1 b; fresh air device 100 still includes fresh air fan 15, fresh air fan 15 locates in the fresh air passageway 1, and be close to the setting of fresh air export 1 b. The fresh air flow rate flowing into the room is increased by the fresh air fan 15.
For improving the comfort level of the user, the fresh air inlet 1a is provided with a fresh air filter screen. Through the filter screen is in order to reach clean air's purpose, improves the quality of the indoor new trend of flow direction, and the user of being convenient for obtains better experience. Specifically, in an embodiment, the filter screen is made of activated carbon.
Similarly, in order to improve the air exhaust efficiency of the air exhaust channel 2, in this embodiment, the air exhaust channel 2 is provided with an air exhaust inlet 2a and an air exhaust outlet 2 b; the fresh air device 100 further includes an exhaust fan 22, and the exhaust fan 22 is disposed in the exhaust passage 2 and adjacent to the exhaust outlet 2 b. The return air flow entering from the exhaust inlet is increased by the exhaust fan 22, and the exhaust efficiency is further improved.
In a first embodiment, referring to fig. 1, based on that the first heat exchange system 3 and the second heat exchange system 4 are respectively provided with two fresh air heat exchangers, the operation states of each part of the fresh air device 100 are as follows: the fresh air fan extracts fresh air from the outdoor environment, and the fresh air sequentially passes through the second fresh air heat exchanger, the fourth fresh air heat exchanger and the first fresh air heat exchanger to exchange heat for four times and then is conveyed to the indoor environment. The exhaust fan extracts exhaust air from an indoor environment, and the exhaust air is subjected to primary heat exchange through the exhaust heat exchanger and then is conveyed to the outdoor. The fresh air device can have a cooling mode, a heating mode and a reheating and dehumidifying mode.
Based on the above features, the specific operation principle of the first embodiment of the fresh air device 100 provided by the present invention is as follows:
when the first heat exchange system 3 operates in a refrigerating mode, the refrigerant circularly flows as follows: the first compressor 31, the first four-way valve 32, the outdoor heat exchanger 33, the first throttling element 34, the first fresh air heat exchanger 11, the second throttling element 35, the second fresh air heat exchanger 12, the first four-way valve 32 and the first compressor 31;
when the second heat exchange system 4 operates in a refrigerating mode, the refrigerant circularly flows as follows: a second compressor 41, a second four-way valve 42, an exhaust air heat exchanger 21, a third throttling element 43, a third fresh air heat exchanger 13, a fourth throttling element 44, a fourth fresh air heat exchanger 14, a second four-way valve 42 and the second compressor 41;
when the first heat exchange system 3 heats, the refrigerant flows as follows: the first compressor 31, the first four-way valve 32, the second fresh air heat exchanger 12, the second throttling element 35, the first fresh air heat exchanger 11, the first throttling element 34, the outdoor heat exchanger 33, the first four-way valve 32 and the first compressor 31;
when the second heat exchange system 4 heats, the refrigerant flows as follows: the second compressor 41, the second four-way valve 42, the fourth fresh air heat exchanger 14, the fourth throttling element 44, the third fresh air heat exchanger 13, the third throttling element 43, the exhaust air heat exchanger 21, the second four-way valve 42 and the second compressor 41.
As such, the fresh air device 100, in the cooling mode: the outdoor heat dissipation and condensation temperature of the first heat exchange system 3 is high, the exhaust heat dissipation and condensation temperature of the second heat exchange system 4 is low, two refrigerant cycles with low pressure ratio are formed by increasing the evaporation temperature of the first heat exchange system 3 and reducing the evaporation temperature of the second heat exchange system 4, and efficient refrigeration operation is realized.
The pressure ratio, which is a ratio of high pressure to low pressure of the (refrigeration) heat pump cycle, may be obtained by a high-low pressure sensor or by a temperature detection conversion between the condenser and the evaporator.
Specifically, in the first heat exchange system 3, the refrigerant in the first compressor 31 enters the outdoor heat exchanger 33 through the first four-way valve 32 to be condensed and radiated, then enters the first fresh air heat exchanger 11 to be evaporated and absorb heat after being throttled and depressurized by the first throttling element 34, and then enters the second throttling element 35, at this time, the second throttling element 35 is not throttled, the refrigerant continues to enter the second fresh air heat exchanger 12 to be evaporated and absorb heat, and finally enters the first compressor 31 through the first four-way valve 32 to complete the refrigeration cycle;
in the second heat exchange system 4, the refrigerant in the second compressor 41 enters the exhaust air heat exchanger 21 through the second four-way valve 42 to be condensed, dissipated of heat and recovered from exhaust air heat, and then enters the third fresh air heat exchanger 13 to be evaporated and absorbed after being throttled and depressurized by the third throttling element 43, and then enters the fourth throttling element 44, at this time, the fourth throttling element 44 is not throttled, the refrigerant continues to enter the fourth fresh air heat exchanger 14, and finally enters the second compressor 41 through the second four-way valve 42, thereby completing the refrigeration cycle.
In the dehumidification reheat mode: 3 outdoor heat dissipation condensation temperature of first heat transfer system is high, 4 heat dissipation condensation temperature of second heat transfer system are low, through improving 3 evaporating temperature of first heat transfer system with reduce 4 evaporating temperature of second heat transfer system form the refrigerant circulation of two low-pressure ratios, and pass through first heat transfer system 3 with the reheat increase of second heat transfer system 4 fresh air equipment 100 subcooling degree realizes high-efficient dehumidification reheat operation.
Specifically, in the first heat exchange system 3, the refrigerant in the first compressor 31 enters the outdoor heat exchanger 33 through the first four-way valve 32 to be condensed and radiated, then passes through the first throttling element 34, at this time, the first throttling element 34 is not throttled, the refrigerant continues to enter the first fresh air heat exchanger 11 to be condensed and radiated, then passes through the second throttling element 35 to be throttled and decompressed, enters the second fresh air heat exchanger 12 to be evaporated and absorb heat, and finally enters the first compressor 31 through the first four-way valve 32 to complete a refrigeration cycle;
in the second heat exchange system 4, the refrigerant in the second compressor 41 enters the exhaust air heat exchanger 21 through the second four-way valve 42 to be condensed, dissipated, condensed and recycled, and then enters the third throttle valve, at this time, the third throttle valve is not throttled, the refrigerant continues to enter the third fresh air heat exchanger 13 to be condensed, dissipated, throttled and depressurized through the fourth throttle valve, enters the fourth fresh air heat exchanger 14 to be evaporated and absorbed, and finally enters the second compressor 41 through the second four-way valve 42 to complete the refrigeration cycle.
In the heating mode, the outdoor heat absorption evaporation temperature of the first heat exchange system 3 is low, the exhaust heat absorption evaporation temperature of the second heat exchange system 4 is high, and two low-pressure-ratio refrigerant cycles are formed by reducing the condensation temperature of the first heat exchange system 3 and increasing the condensation temperature of the second heat exchange system 4, so that high-efficiency heating operation is realized.
Specifically, in the first heat exchange system 3, the refrigerant in the first compressor 31 enters the second fresh air heat exchanger 12 through the first four-way valve 32 to be condensed and radiated, then passes through the second throttling element 35, at this time, the second throttling element 35 is not throttled, the refrigerant continues to enter the first fresh air heat exchanger 11 to be condensed and radiated, then passes through the first throttling element 34 to be throttled and decompressed, enters the outdoor heat exchanger 33 to be evaporated and absorb heat, and finally enters the first compressor 31 through the first four-way valve 32 to complete a refrigeration cycle;
in the second heat exchange system 4, the refrigerant in the second compressor 41 enters the fourth fresh air heat exchanger 14 through the second four-way valve 42 to be condensed and radiated, and then enters the fourth throttling element 44, at this time, the fourth throttling element 44 is throttled, the refrigerant continues to enter the third fresh air heat exchanger 13 to be condensed and radiated, and then enters the exhaust air heat exchanger 21 to be evaporated, absorbed and recovered with exhaust air heat after being throttled and depressurized by the third throttling element 43, and finally enters the second compressor 41 through the second four-way valve 42 to complete the refrigeration cycle.
In the second embodiment of the fresh air device 100, when the first heat exchange system 3 operates in a cooling mode, the refrigerant flows in a circulating manner as follows: the integrated compressor 5-a first four-way valve 32-an outdoor heat exchanger 33-a first throttling element 34-a first fresh air heat exchanger 11-a second throttling element 35-a second fresh air heat exchanger 12-a first four-way valve 32-the integrated compressor 5;
when the second heat exchange system 4 operates in a refrigerating mode, the refrigerant circularly flows as follows: the integrated compressor 5, a second four-way valve 42, an exhaust heat exchanger 21, a third throttling element 43, a third fresh air heat exchanger 13, a fourth throttling element 44, a fourth fresh air heat exchanger 14, a second four-way valve 42 and the integrated compressor 5;
when the first heat exchange system 3 is in heating operation, the refrigerant flows as follows: the integrated compressor 5-a first four-way valve 32-a second fresh air heat exchanger 12-a second throttling element 35-a first fresh air heat exchanger 11-a first throttling element 34-an outdoor heat exchanger 33-a first four-way valve 32-the integrated compressor 5;
when the second heat exchange system 4 is in heating operation, the refrigerant circulation flow direction is as follows: the integrated compressor 5, a second four-way valve 42, a fourth fresh air heat exchanger 14, a fourth throttling element 44, a third fresh air heat exchanger 13, a third throttling element 43, an exhaust air heat exchanger 21, a second four-way valve 42 and the integrated compressor 5.
The operation principles of the cooling mode, the heating mode and the dehumidification and reheat mode in the second embodiment are the same as those of the three modes in the first embodiment, and are not described herein.
It can be understood that the first fresh air heat exchanger 11 and the second fresh air heat exchanger 12 of the first heat exchange system 3 and the third fresh air heat exchanger 13 and the fourth fresh air heat exchanger 14 of the second heat exchange system 4 are controlled to operate as evaporators, and heat in fresh air is absorbed, so that the fresh air is cooled, the area of the evaporator contacted by the fresh air can be greatly increased, the energy efficiency of the fresh air is increased when the fresh air is cooled, and the energy efficiency state of the fresh air device 100 is increased.
In concrete implementation, the first throttling element 34 of the first heat exchange system 3 can be controlled to work, throttling and pressure reduction are carried out, the second throttling element 35 is controlled to stop working or bypass is started, the first fresh air heat exchanger 11 and the second fresh air heat exchanger 12 are operated as evaporators, fresh air is cooled, the area of the evaporators of the first heat exchange system 3 is increased, the evaporation temperature of the first heat exchange system 3 is increased, and therefore the energy efficiency of the first heat exchange system 3 is improved.
In specific implementation, the third throttling element 43 in the second heat exchange system 4 can be controlled to work, throttling and pressure reduction are performed, and the fourth throttling element 44 is controlled to stop working or to start bypass, so that the third fresh air heat exchanger 13 and the fourth fresh air heat exchanger 14 both operate as evaporators to cool fresh air, the area of the evaporators of the second heat exchange system 4 is increased, the evaporation temperature of the second heat exchange system 4 is increased, and the energy efficiency of the second heat exchange system 4 is improved. The third throttling element 43 and the fourth throttling element 44 may also be controlled to be opened to perform throttling and pressure reduction, but the opening degree of the third throttling element 43 is kept larger than that of the fourth throttling element 44, so that the evaporation temperature of the second heat exchange system 4 is increased, and the energy efficiency of the second heat exchange system 4 is improved.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents made by the contents of the present specification and drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (11)

1. A new trend equipment, its characterized in that includes:
the air purifier comprises a shell, wherein the shell is provided with a fresh air channel and an exhaust air channel;
the first heat exchange system is used for exchanging heat between the fresh air channel and the external environment; and the number of the first and second groups,
the second heat exchange system is used for exchanging heat between the fresh air channel and the exhaust channel;
the fresh air channel is internally provided with a plurality of fresh air heat exchangers, at least one of the fresh air heat exchangers is positioned on the refrigerant flow path of the first heat exchange system, and at least one of the fresh air heat exchangers is positioned on the refrigerant flow path of the second heat exchange system.
2. The fresh air device as claimed in claim 1, wherein at least two of the fresh air heat exchangers are disposed on the refrigerant flow path of the first heat exchange system; and/or the presence of a gas in the gas,
and the at least two fresh air heat exchangers are arranged on a refrigerant flow path of the second heat exchange system.
3. The fresh air device as claimed in claim 2, wherein in the fresh air channel, from outdoor to indoor, at least two fresh air heat exchangers disposed on the refrigerant flow path of the first heat exchange system and at least two fresh air heat exchangers disposed on the refrigerant flow path of the second heat exchange system are alternately disposed in sequence.
4. The fresh air device as claimed in claim 1, wherein a first refrigerant flow path is formed on the first heat exchange system, and the first heat exchange system comprises a first compressor, a first four-way valve, an outdoor heat exchanger and a first throttling element which are arranged on the first refrigerant flow path and are sequentially connected;
the first refrigerant flow path is provided with two fresh air heat exchangers, a second throttling element is arranged between the two fresh air heat exchangers, and the two fresh air heat exchangers comprise a first fresh air heat exchanger and a second fresh air heat exchanger;
in the fresh air channel, the first fresh air heat exchanger is positioned on one side of the second fresh air heat exchanger, which is far away from the air inlet of the fresh air channel;
on the first refrigerant flow path, the first throttling element, the first fresh air heat exchanger, the second throttling element, the second fresh air heat exchanger and the first four-way valve are connected in sequence.
5. The fresh air device as claimed in claim 4, wherein the heat exchange area of the outdoor heat exchanger is S1, and the heat exchange area of the first fresh air heat exchanger is S2, S2/S1 is less than or equal to 0.5.
6. The fresh air device as claimed in claim 4, further comprising an outdoor fan disposed corresponding to the outdoor heat exchanger.
7. The fresh air device as claimed in claim 1, wherein a second refrigerant flow path is formed on the second heat exchange system, and the second heat exchange system comprises a second compressor, a second four-way valve, an exhaust heat exchanger and a third throttling element which are arranged on the second refrigerant flow path and are sequentially connected;
the second refrigerant flow path is provided with two fresh air heat exchangers, a fourth throttling element is arranged between the two fresh air heat exchangers, and the two fresh air heat exchangers comprise a third fresh air heat exchanger and a fourth fresh air heat exchanger;
in the fresh air channel, the third fresh air heat exchanger is positioned on one side of the fourth fresh air heat exchanger, which is far away from the air inlet of the fresh air channel;
and on the second refrigerant flow path, the third throttling element, the third fresh air heat exchanger, the fourth throttling element, the fourth fresh air heat exchanger and the second four-way valve are sequentially connected.
8. The fresh air device as claimed in claim 7, wherein the heat exchange area of the exhaust heat exchanger is S4, the heat exchange area of the third fresh air heat exchanger is S5, and S5/S4 is less than or equal to 1.5.
9. The fresh air device as claimed in claim 1, wherein the fresh air device comprises an integrated compressor, two separated compression parts are formed in the integrated compressor, each compression part comprises a compression cavity, and an air return port and an air exhaust port communicated with the compression cavity, airflow can be sucked from the corresponding air return port in each of the two compression cavities, and after being compressed, the airflow is exhausted from the corresponding air exhaust port;
the two compression parts are respectively and correspondingly arranged on the refrigerant flow path of the first heat exchange system and the refrigerant flow path of the second heat exchange system.
10. The fresh air device as claimed in claim 1, wherein the fresh air channel is provided with a fresh air inlet and a fresh air outlet;
the fresh air device further comprises a fresh air fan, and the fresh air fan is arranged in the fresh air channel and is adjacent to the fresh air outlet.
11. The fresh air device as claimed in claim 1, wherein the exhaust duct is provided with an exhaust inlet and an exhaust outlet;
the fresh air equipment further comprises an air exhaust fan, and the air exhaust fan is arranged in the air exhaust channel and is close to the air exhaust outlet.
CN202122922745.1U 2021-11-24 2021-11-24 Fresh air equipment Active CN216281897U (en)

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Application Number Priority Date Filing Date Title
CN202122922745.1U CN216281897U (en) 2021-11-24 2021-11-24 Fresh air equipment

Publications (1)

Publication Number Publication Date
CN216281897U true CN216281897U (en) 2022-04-12

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