Fresh air system

Abstract

A fresh air system includes a box body and a fresh air area, a first return air area and a mixed air area arranged in the box body, the first return air area is used to introduce indoor return air, the mixed air area is used to mix the fresh air with the return air and send it into the room after cooling or heating, the fresh air system also includes a second return air area, the second return air area includes a second return air duct, the fresh air area includes a fresh air duct and a heat exchanger, the heat exchanger is arranged in the fresh air duct and the second return air duct, and performs heat exchange with the air in the corresponding ducts, one end of the heat exchanger is connected to the first return air area and a second regulating air valve is provided at the connection point, which is used to supplement fresh air and adjust the amount of fresh air introduced. The above-mentioned fresh air system quickly discharges polluted air through the second return air area, performs heat exchange through the air in the fresh air duct and the second return air duct, improves energy utilization efficiency, uses the second regulating air valve to supplement the amount of fresh air introduced, and improves indoor environmental comfort.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning systems, and in particular to a fresh air system. Background Art

[0002] At present, when the air conditioners on the market are running, the doors and windows are in a closed state. Long-term living and living processes result in polluted air that cannot be discharged in time. Without the replenishment and ventilation of fresh air, the long-term closed circulating air volume is prone to breed bacteria, which has a certain adverse effect on the health and life of indoor personnel, such as common colds, air-conditioning diseases, etc., especially for people who hold meetings in small office conference rooms or pregnant women. The improvement of indoor air quality by the fresh air system has been favored by many customers. The fresh air system is the product of the combination of the fresh air system and the air conditioning system. While satisfying the indoor temperature regulation of the air conditioner, it exchanges with the outside air, thereby completing the indoor and outdoor air exchange. However, since the fresh air system introduces outdoor air into the room, the use of the fresh air system will balance the indoor and outdoor temperatures, resulting in increased energy consumption and easily causing a decrease in comfort, and the fresh air system cannot quickly discharge indoor polluted air. Summary of the invention

[0003] In view of this, it is necessary to provide a fresh air system that can effectively exhaust indoor polluted air.

[0004] A fresh air system comprises a box body and a fresh air area, a first return air area and a mixed air area arranged in the box body, the fresh air area is connected to the mixed air area, the first return air area is connected to the mixed air area, the first return air area is used to introduce indoor return air, the mixed air area is used to mix the fresh air introduced in the fresh air area with the indoor return air introduced in the first return air area, and then send it into the room after cooling or heating. The fresh air system also comprises a second return air area, the second return air area comprises a second return air duct, the second return air duct is used to discharge indoor polluted air, the fresh air area comprises a fresh air duct and a heat exchanger, the heat exchanger is arranged in the fresh air duct and the second return air duct to enable heat exchange between the air in the fresh air duct and the second return air duct, one end of the heat exchanger is connected to the first return air area and a second regulating air valve is provided at the connection point for supplementing fresh air and adjusting the amount of supplemented fresh air introduced.

[0005] Furthermore, the box body includes a top plate, on which an air inlet and an exhaust outlet are provided, and the air inlet and the exhaust outlet are respectively arranged correspondingly at one end of the fresh air duct and the second return air duct close to the top plate.

[0006] Furthermore, a second return air inlet is provided on the top plate, and the second return air inlet is arranged at one end of the second return air duct away from the exhaust air outlet, and the second return air inlet is used to be connected to the indoor kitchen and / or toilet.

[0007] Furthermore, an electrostatic dust removal and nano sterilization device is provided at the exhaust outlet to purify the air.

[0008] Furthermore, the mixed air zone includes a mixed air duct, in which an evaporator and a blower are provided. The evaporator is used to cool or heat the air, and the blower is used to deliver the cooled or heated air into the room.

[0009] Furthermore, the mixed air zone also includes a fourth partition, which is arranged inside the box to form a accommodating portion, and the accommodating portion is used to accommodate a compressor and a condenser used in conjunction with the evaporator, so that the fresh air system can be used as an all-in-one machine.

[0010] Furthermore, a first regulating air valve is provided at the connection point between the fresh air duct and the mixing air duct, the first return air zone includes a first return air duct, the first return air duct is connected to the mixing air duct and a third regulating air valve is provided at the connection point for adjusting the introduction ratio of fresh air and return air.

[0011] Furthermore, the first regulating air valve and the third regulating air valve are fixed to each other, and a baffle is provided between the third regulating air valve and the first regulating air valve for separating the fresh air duct from the first return air duct.

[0012] Furthermore, filtering devices are provided in the fresh air duct, the first return air duct and the second return air duct.

[0013] Furthermore, the filtering device is provided with a timing system for recording the usage time of the filtering device.

[0014] The above-mentioned fresh air system quickly exhausts indoor polluted air by setting up a second return air area, and exchanges heat between the fresh air duct and the air in the second return air duct. The heat or cold of the air exhausted from the room can be exchanged with the outdoor air that is about to enter the room, thereby reducing the loss of heat or cold of the indoor air, thereby improving energy utilization efficiency, and using the second regulating air valve to adjust the amount of fresh air introduced to improve the comfort of the indoor environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a fresh air system in one embodiment of the present invention.

[0016] Figure 2 It is a schematic structural diagram of a fresh air system in one embodiment of the present invention.

[0017] Figure 3 This is a structural schematic diagram from another perspective of a fresh air system in one embodiment of the present invention.

[0018] Main component symbols

[0019]

[0020]

[0021] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0025] Please also read Figure 1 , Figure 2 and Figure 3 In one embodiment, a fresh air system 100 includes a box 10, a fresh air area 20, a first return air area 30, a mixed air area 40, and a second return air area 50. The fresh air area 20, the first return air area 30, the mixed air area 40, and the second return air area 50 are all separately arranged in the box 10.

[0026] The box body 10 includes a top plate 11, a bottom plate 12, side plates 13 arranged opposite to each other, and a front plate and a back plate (not numbered) connected to the top plate 11, the bottom plate 12 and the side plates 13, respectively. In one embodiment, the box body 10 is a roughly rectangular parallelepiped structure. The top plate 11 is provided with an air inlet 111, an air outlet 112, a first return air inlet 113, a second return air inlet 114 and an exhaust air outlet 115. In one embodiment, the air inlet 111 and the exhaust air outlet 115 are arranged adjacent to each other so that the air in the corresponding air duct can be heat exchanged, thereby improving energy utilization efficiency. The air inlet 111 is connected to the fresh air zone 20, the air outlet 112 is connected to the mixed air zone 40, the first return air inlet 113 is connected to the first return air zone 30, and the second return air inlet 114 and the exhaust air outlet 115 are both connected to the second return air zone 50. A bottom bracket 121 is provided on one side of the bottom plate 12 away from the top plate 11 to increase the stability of the box body 10 when it is placed.

[0027] The fresh air zone 20 includes a fresh air duct 21, a first regulating air valve 22 and a heat exchanger 23. The fresh air duct 21 is composed of the top plate 11, the side plate 13, the heat exchanger 23 and a first partition plate 231 disposed on the heat exchanger 23. One end of the fresh air duct 21 close to the top plate 11 is connected to the air inlet 111, and the other end is provided with the first regulating air valve 22, which is used to control the opening and closing of the fresh air duct 21. The heat exchanger 23 is arranged in the fresh air duct 21. A second regulating air valve 24 is arranged at one end of the heat exchanger 23 away from the air inlet 111. The second regulating air valve 24 is used to adjust the amount of supplementary fresh air introduced. The opening and closing degree of the second regulating air valve 24 can be controlled according to demand. Specifically, the supplementary fresh air enters from the air inlet 111, passes through the heat exchanger 23, enters the first return air area 30 through the second regulating air valve 24, and then flows into the mixing air area 40 to mix with the fresh air in the fresh air area 20, so as to supplement the amount of fresh air introduced. In one embodiment, a cooling device is also arranged in the fresh air duct 21. The cooling device is used to remove heat from the fresh air in summer, which is beneficial for the fresh air system to shorten the cooling time and quickly reduce the indoor temperature. In one embodiment, the cooling device is a water cooling device. It can be understood that a filtering device is arranged between the air inlet 111 and the heat exchanger 23 in the fresh air duct 21 to filter dust impurities and other harmful substances to the human body in the introduced outdoor fresh air. In one embodiment, the filter device is a two-layer structure, specifically a primary and secondary efficiency filter structure and a sub-high efficiency filter structure.

[0028] The first return air zone 30 includes a second partition 31, a third partition 32, a third regulating air valve 33 and a first return air duct 34. One end of the second partition 31 is connected to the side panel 13, and the other end is connected to the third regulating air valve 33. The third partition 32 is arranged between the side panel 13 and the heat exchanger 23 and is respectively connected to the top panel 11, the second partition 31 and the first partition 231. The third partition 32 is arranged roughly parallel to the front panel and the back panel. The end of the third partition 32 away from the top panel 11 is separated from the second partition 31 to form a return air flow space. In one embodiment, an electric control box is provided on the third partition 32, and a control system is provided in the electric control box for controlling the fresh air system to realize various functions. The first return air duct 34 is formed by the second partition plate 31, the third partition plate 32, the side plate 13, the top plate 11, the heat exchanger 23, the front plate and the back plate, and the second regulating air valve 24 is located in the first return air duct 34. The first return air duct 34 is connected to the indoor place, such as the living room, bedroom, office, conference room, etc. through a pipeline, and is used to mix the return air in the room with the newly introduced fresh air. It can be understood that the first return air duct 34 is provided with the filtering device. One end of the first return air duct 34 is connected to the first return air inlet 113, and the other end is provided with the third regulating air valve 33. The third regulating air valve 33 and the first regulating air valve 22 are fixed to each other, and a baffle 35 is provided between the third regulating air valve 33 and the first regulating air valve 22, which is used to separate the fresh air area 20 from the first return air area 30. The third regulating air valve 33 is used to control the opening and closing of the first return air duct 34 and the degree of opening and closing, so as to control the air volume of the indoor return air introduced.

[0029] The mixed air zone 40 includes a fourth partition 41, an evaporator 42, an air blower 43, a fifth partition 44 and a mixed air duct 45. The two ends of the fourth partition 41 are respectively connected to the bottom plate 12 and the side plate 13 to form a receiving portion 411. In one embodiment, the receiving portion 411 is used to set a compressor and a condenser so that the fresh air system 100 can be used as an all-in-one machine with its own cold and heat sources. It is understandable that the fresh air system 100 can also be used in conjunction with an external outdoor unit. The evaporator 42 is fixed to the second partition 31 and the fourth partition 41. A fixing plate 431 is provided on the air blower 43, and the two ends of the fixing plate 431 are fixed to the side plate 13 and the second partition 31. It is understandable that a through hole is provided on the fixing plate 431 for the mixed air to pass through. One end of the fifth partition plate 44 is fixed on the top plate 11 and is located between the air outlet 112 and the second return air inlet 114, and the other end is fixed on the second partition plate 31. The mixing air duct 45 is formed by the bottom plate 12, the second partition plate 31, the third partition plate 32, the side plate 13 and the fifth partition plate 44. The mixing air duct 45 is used to mix the fresh air with the indoor return air and then send it into the room. It can be understood that by controlling the opening and closing of the third regulating air valve 33, it is possible to control the use of fresh air and return air mixed or fresh air alone, and by controlling the opening and closing degree of the third regulating air valve 33, it is possible to control the mixing ratio of fresh air and return air.

[0030] When the third regulating air valve 33 is closed, the outdoor unit introduces fresh air into the fresh air duct 21 through the air inlet, and after filtering, the fresh air enters the mixing air duct 45 through the first regulating air valve 22 after heat exchange through the heat exchanger 23, and is cooled or heated by the evaporator 42 before being delivered into the room through the blower 43.

[0031] When the first regulating air valve 22 and the third regulating air valve 33 are both opened, fresh air is introduced into the fresh air duct 21 through the air inlet, filtered, and then heat-exchanged in the heat exchanger 23 before entering the mixing duct 45 through the first regulating air valve 22; indoor return air enters the first return air duct 34 from the first return air inlet 113 after being filtered, and enters the mixing duct 45 through the third regulating air valve 33. Fresh air and return air are mixed in the mixing duct 45, and after being cooled or heated by the evaporator 42, they are sent into the room through the blower 43. It is understandable that when the indoor temperature is within a comfortable range, the amount of fresh air introduced can be reduced to save energy. It is understandable that when the demand for fresh air is large, more fresh air can be introduced by controlling the second regulating air valve 24 to improve comfort.

[0032] The second return air zone 50 includes an exhaust fan 51, a sixth partition 52 and a second return air duct 53. The exhaust fan 51 is arranged at the exhaust air outlet 115, and is used to discharge the return air to the outside, so that a negative pressure state is formed indoors, so that fresh air can continuously enter the room. One end of the sixth partition 52 is connected to the fifth partition 44, and the other end is connected to the heat exchanger 23. In one embodiment, the sixth partition 52 is substantially perpendicular to the fifth partition 44 and substantially parallel to the top plate 11. The second return air duct 53 is formed by the third partition 32, the fifth partition 44, the sixth partition 52, the heat exchanger 23, the first partition 231 and the back plate. One end of the second return air duct 53 away from the exhaust air outlet 115 is connected to the second return air inlet 114, and the other end is connected to the exhaust air outlet 115. The heat exchanger 23 is partially arranged in the second return air duct 53, and is used to recover the energy in the indoor wind discharged from the exhaust air outlet 115. The filtering device is also provided at the second return air inlet 114. The second return air inlet 114 is connected to a place where indoor air pollution is serious, such as a toilet, a kitchen or a place where many people gather, through a pipeline. In one embodiment, an electrostatic dust removal and nano sterilization device is provided at the exhaust air outlet 115 to purify the air. The specific exhaust process is that the indoor return air enters the second return air duct 53 through the second return air inlet 114, enters the heat exchanger 23 after filtration, and after heat exchange with the outdoor fresh air, the heat or cold of the indoor air exhausted can be exchanged with the outdoor air that is about to enter the room, so as to recover the heat or cold of the gas discharged to the outside to a certain extent, thereby reducing the loss of heat or cold of the indoor air, thereby improving energy utilization efficiency, and then discharged to the outside through the exhaust fan 51, and the indoor polluted air is discharged to the outside after purification and sterilization, which can effectively prevent the polluted air from entering the room again as fresh air.

[0033] It is understandable that the above-mentioned filter device is provided with a timing system, which is connected to the control system and is used to record the use time of the filter device and to remind the user to replace it in time.

[0034] The above-mentioned fresh air system quickly discharges indoor polluted air by setting up a second return air area, and performs heat exchange between the fresh air entering through the air inlet and the return air discharged through the exhaust outlet, so that the heat or cold of the air discharged from the indoor air can be exchanged with the outdoor air that is about to enter the indoor air. By setting up the first return air inlet, the heat or cold in the indoor return air is mixed with the fresh air, thereby reducing the loss of heat or cold of the indoor air, thereby improving energy utilization efficiency, and using the second regulating air valve to supplement the amount of fresh air introduced to improve the comfort of the indoor environment.

[0035] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection claimed by the present invention.

Claims

1. A fresh air system, comprising a box body, and a fresh air area, a first return air area and a mixed air area arranged in the box body, the fresh air area is connected to the mixed air area, the first return air area is connected to the mixed air area, the first return air area is used to introduce indoor return air, the mixed air area is used to mix the fresh air introduced by the fresh air area with the indoor return air introduced by the first return air area, and then send it into the room after cooling or heating, the mixed air area comprises a mixing air duct, an evaporator and a blower are arranged in the mixing air duct, the evaporator is used to cool or heat the air, the blower is used to send the cooled or heated air into the room, the mixed air area also comprises a fourth partition, the fourth partition is arranged inside the box body to form a accommodating portion, the accommodating portion is used to accommodate a compressor and a condenser used in conjunction with the evaporator, and is characterized in that: The fresh air system also includes a second return air zone, the second return air zone includes a second return air duct, and the second return air duct is used to discharge indoor polluted air, the fresh air zone includes a fresh air duct and a heat exchanger, the heat exchanger is arranged in the fresh air duct and the second return air duct to enable heat exchange between the air in the fresh air duct and the second return air duct, the box body includes a top plate, and an air inlet and an exhaust outlet are provided on the top plate, the air inlet and the exhaust outlet are respectively arranged at one end of the fresh air duct and the second return air duct close to the top plate, a first regulating air valve is provided at the connection point between the fresh air duct and the mixing duct, one end of the heat exchanger is connected to the first return air zone and a second regulating air valve is provided at the connection point for supplementing fresh air and adjusting the amount of supplemented fresh air introduced, the first return air zone includes a first return air duct, the first return air duct is connected to the mixing duct and a third regulating air valve is provided at the connection point for adjusting the introduction ratio of fresh air and return air.

2. The fresh air system according to claim 1, characterized in that: A second return air inlet is also provided on the top plate, and the second return air inlet is arranged at one end of the second return air duct away from the exhaust air outlet, and the second return air inlet is used to be connected to the indoor kitchen and / or toilet.

3. The fresh air system according to claim 1, characterized in that: The air outlet is provided with an electrostatic dust removal and nano sterilization device for purifying the air.

4. The fresh air system according to claim 1, characterized in that: A baffle is provided between the third regulating air valve and the first regulating air valve, for separating the fresh air duct from the first return air duct.

5. The fresh air system according to claim 1, characterized in that: The fresh air duct, the first return air duct and the second return air duct are all provided with filtering devices.

6. The fresh air system according to claim 5, characterized in that: The filtering device is provided with a timing system for recording the use time of the filtering device.

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