Total heat exchange low-noise fresh air ventilator

Abstract

A total heat exchange low-noise fresh air machine comprises a machine body, a fresh air channel and an old air channel, the fresh air channel and the old air channel are arranged in the machine body, and a total heat exchanger is arranged between the fresh air channel and the old air channel. The total heat exchanger is of a hexagonal structure and is obliquely arranged, two opposite horizontal planes in the obliquely arranged total heat exchanger serve as a fresh air heat exchange inlet and a fresh air heat exchange outlet of the fresh air channel, and two opposite first inclined planes serve as an old air heat exchange inlet and an old air heat exchange outlet of the old air channel; the length of the first inclined face is larger than or equal to that of the horizontal face. On one hand, the heat exchange area can be greatly increased, the resistance can be reduced, the noise can be further reduced, in combination with the overall structure, the airflow flowing path is free of too many turns, smooth flowing is achieved, and the overall noise is greatly reduced; on the other hand, the filtering area is greatly increased and the resistance is reduced by arranging the high-efficiency filter.

Description

Technical Field

[0001] The utility model relates to a fresh air fan, in particular to a full heat exchange low-noise fresh air fan. Background Art

[0002] Fresh air fan, also known as fresh air system, is a device used to improve indoor air quality. It is used to introduce outdoor fresh air into the machine body, and after pre-filtration by coarse filter and electrostatic precipitator, it enters high-efficiency filter for further purification, and realizes energy recovery through heat exchanger. Finally, the filtered clean air is supplied to the room through fresh air fan, and the indoor dirty air is discharged through exhaust fan. Such a cycle operation can continuously improve indoor air quality and save energy. The heat exchanger plays an energy-saving role in the fresh air system. It can recover the heat in the indoor air and transfer the heat in the discharged indoor dirty air to the fresh air entering the system, thereby reducing the heating burden or cooling burden.

[0003] The heat exchangers of existing fresh air fans are mainly of two structures: quadrilateral and hexagonal. Most of the existing hexagonal heat exchangers are vertically arranged in the fresh air fan, and the fresh air heat exchange inlet, fresh air heat exchange outlet, old air heat exchange inlet and old air heat exchange outlet are all inclined surfaces. On the one hand, this structure will increase the height of the entire body, and on the other hand, it will cause more turns in the airflow path, thereby increasing resistance and increasing noise. Utility Model Content

[0004] The utility model aims to overcome the above-mentioned deficiencies of the prior art and to provide a low-noise fresh air fan with full heat exchange and small resistance and high filtering efficiency.

[0005] The technical solution of the utility model is: a low-noise fresh air fan with full heat exchange, comprising a machine body and a fresh air channel and an old air channel arranged in the machine body, a total heat exchanger is arranged between the fresh air channel and the old air channel; the total heat exchanger is a hexagonal structure, and the total heat exchanger is inclined, and two opposite horizontal planes in the inclined total heat exchanger serve as a fresh air heat exchange inlet and a fresh air heat exchange outlet of the fresh air channel, and two opposite first inclined planes serve as an old air heat exchange inlet and an old air heat exchange outlet of the old air channel; the length of the first inclined plane is greater than or equal to the length of the horizontal plane.

[0006] Furthermore, the lengths of the other two opposite second inclined surfaces of the total heat exchanger are smaller than the lengths of the horizontal surface and the first inclined surface.

[0007] Furthermore, in the area where the total heat exchanger is located, a limit block is provided at its diagonal position, the total heat exchanger is positioned between the two limit blocks, the second inclined surface of the total heat exchanger is in adaptive contact with the limit block, and a partition is provided between the first inclined surface and the horizontal plane.

[0008] Furthermore, a coarse-effect filter, an electrostatic precipitator, a fresh air fan and a high-efficiency filter are sequentially arranged along the air flow path in the fresh air channel, an exhaust fan is arranged along the old air flow path in the old air channel, and the two horizontal planes of the total heat exchanger are arranged between the coarse-effect filter and the electrostatic precipitator.

[0009] Furthermore, the coarse-effect filter and the electrostatic precipitator are respectively arranged in parallel with two horizontal planes of the total heat exchanger; and a carbon dioxide detection sensor is provided on the side of the old air heat exchange inlet in the area where the total heat exchanger is located.

[0010] Furthermore, the old air heat exchange inlet is connected to the old air input channel of the old air channel, the old air heat exchange outlet is connected to the old air output channel of the old air channel, and an exhaust fan is provided in the old air output channel; the old air input channel is a long and narrow space, and the length of the old air input channel is greater than 1 / 2 of the length of the machine body.

[0011] Furthermore, the high efficiency filter comprises at least one group of filter units arranged in an inverted V shape, and each filter unit comprises two filter bodies arranged at an angle.

[0012] Furthermore, when the high-efficiency filter includes a plurality of filter units, the filter units are spaced apart from each other, a frame is provided around the filter core of the filter body, and partitions are formed between adjacent filter units by bending the frame; the frame of the filter body is a plastic frame.

[0013] Furthermore, a fresh air outlet and an exhaust air inlet are provided on the top of the machine body, and a fresh air inlet and an exhaust air outlet are provided on at least one of the side surface, bottom surface and back surface of the machine body.

[0014] Furthermore, a control panel, a dust detection sensor connected to the control panel, and a safety switch are provided in the area where the fresh air blower is located.

[0015] The beneficial effects of the utility model are as follows: on the one hand, by designing the structure and angle of the full heat exchanger, the heat exchange area can be greatly increased, the resistance can be reduced, and the noise can be reduced. In addition, combined with the overall structure, the air flow path has few turns, and the flow is relatively smooth, and the overall noise is greatly reduced. On the other hand, the setting of the high-efficiency filter greatly increases the filtration area and reduces the resistance. It can be said that compared with traditional air purifiers, the utility model has better ventilation effect and lower noise, is suitable for various places such as homes, offices, schools, etc., and can effectively improve indoor air quality and improve living comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an internal schematic diagram of the front structure of the fresh air fan of the embodiment of the utility model;

[0017] Figure 2 yes Figure 1 a side view of the illustrated embodiment;

[0018] Figure 3 yes Figure 1 a top view of the illustrated embodiment;

[0019] Figure 4 yes Figure 1 Schematic diagram of the enlarged structure of the high efficiency filter shown.

[0020] Description of the accompanying drawings:

[0021] 1. Machine body; 2. Total heat exchanger; 3. Coarse filter; 4. Electrostatic precipitator; 5. Fresh air fan; 6. High efficiency filter; 7. Exhaust fan; 8. Old air input channel; 9. Carbon dioxide detection sensor; 11. Fresh air inlet; 12. Exhaust outlet; 13. Exhaust inlet; 14. Fresh air outlet; 15. Control panel; 16. Dust detection sensor; 17. Safety switch; 21. Horizontal plane; 22. First inclined plane; 23. Second inclined plane; 24. Limit block; 25. Triangular area; 41. High voltage power supply; 61. Filter unit; 62. Frame; 63. Filter element. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] As Figures 1 to 4 As shown: A low-noise fresh air fan with full heat exchange, comprising a body 1 and a fresh air channel and an old air channel arranged in the body 1, a total heat exchanger 2 is arranged between the fresh air channel and the old air channel, the total heat exchanger 2 is a hexagonal structure, and the total heat exchanger 2 is inclined, and two opposite horizontal planes 21 in the inclined total heat exchanger serve as a fresh air heat exchange inlet and a fresh air heat exchange outlet of the fresh air channel, and two opposite first inclined planes 22 serve as an old air heat exchange inlet and an old air heat exchange outlet of the old air channel; the length of the first inclined plane 22 is greater than or equal to the length of the horizontal plane 21.

[0024] The above scheme has the following advantages: (1) by tilting the total heat exchanger, and using the horizontal plane as the fresh air heat exchange inlet and fresh air heat exchange outlet of the fresh air channel, and using the first tilted plane as the old air heat exchange inlet and old air heat exchange outlet of the old air channel; this structure can reduce the resistance of the total heat exchanger, thereby reducing noise; on the one hand, it increases the cross-sectional area of ​​the inlet and outlet air, thereby reducing the resistance; on the other hand, it reduces the turning of the airflow when entering and leaving the total heat exchanger, thereby reducing the turning loss of the airflow and reducing the resistance; and the tilted total heat exchanger can make the fresh air more evenly distributed on the horizontal plane when entering and leaving. (1) The first inclined surface helps to reduce the friction resistance between the airflow and the surface of the heat exchanger; (2) The inclined heat exchanger can make better use of space, especially in the height direction of the machine body. Compared with the traditional vertical or horizontal setting, the inclined setting can accommodate a longer heat exchanger at the same height, thereby increasing the heat exchange area and improving the heat exchange efficiency; and the flow path of the airflow in the heat exchanger becomes shorter, reducing the pressure loss of the airflow inside the heat exchanger, so that a thinner heat exchanger core can be used, further reducing the thickness of the machine body.

[0025] The above scheme also has the following advantages: the total heat exchanger is a hexagonal structure, and an irregular hexagon. It is preferably designed that the length of the first inclined surface 22 is greater than the length of the horizontal surface 21, and the length of the horizontal surface 21 is greater than the length of the other two opposite second inclined surfaces 23. On the one hand, the cross-sectional area of ​​the heat exchange of the old air channel is increased: the length of the first inclined surface is greater than the length of the horizontal surface, which means that the cross-sectional area of ​​the heat exchange of the old air channel is greater than that of the fresh air channel. In the total heat exchanger, the old air usually carries more pollutants and water vapor. Increasing the cross-sectional area of ​​the old air channel helps to reduce the resistance on the old air side, improve the exhaust efficiency, and reduce the risk of condensation inside the total heat exchanger; setting the length of the second inclined surface to the shortest can increase the heat exchange area between the fresh air and the old air, so that the flow rate of the fresh air and the old air in their respective channels reaches the optimal ratio, greatly improving the heat exchange efficiency; on the other hand, the length of the first inclined surface and the horizontal surface is longer, which can provide greater support and reduce the vibration and deformation of the total heat exchanger during operation.

[0026] In this embodiment, in the area where the total heat exchanger 2 is located, a limit block 24 is provided at its diagonal position, the total heat exchanger is positioned between the two limit blocks 24, the second inclined surface 23 of the total heat exchanger is in contact with the limit block 24, and a partition is provided between the first inclined surface 22 and the horizontal surface 21. Partition setting is already a common technology in the field of fresh air blowers, such as using glued partitions, setting partition board partitions, etc., which will not be described in detail here. By setting the limit block, the installation and positioning of the total heat exchanger is facilitated.

[0027] In this embodiment, the angle between the first inclined surface 22 of the total heat exchanger 2 and the horizontal direction is preferably 55° to 70°, and more preferably 60°.

[0028] In this embodiment, the plate spacing of the full heat exchanger is 2.8 mm, and a polymer membrane made of special materials is used to efficiently achieve energy exchange between cold and hot air.

[0029] In this embodiment, a coarse filter 3, an electrostatic precipitator 4, a fresh air fan 5 and a high-efficiency filter 6 are sequentially arranged along the air flow path in the fresh air channel, and an exhaust fan 7 is arranged along the old air flow path in the old air channel. Two opposite horizontal planes 21 of the total heat exchanger are connected between the coarse filter 3 and the electrostatic precipitator 4, the old air heat exchange inlet is connected to the old air input channel 8 of the old air channel, and the old air heat exchange outlet is connected to the old air output channel of the old air channel, and an exhaust fan 7 is arranged in the old air output channel. Among them, the old air input channel 8 is a long and narrow space, and the length of the old air input channel 8 is greater than 1 / 2 of the length of the machine body. In addition, a triangular area 25 is formed between the old air input channel 8 and the old air heat exchange inlet side of the first inclined surface 22 of the total heat exchanger 2, so that the old air can enter the triangular area 25 through the narrow and long old air input channel 8, and enter the total heat exchanger from the old air heat exchange inlet (i.e., the second inclined surface) through the triangular area 25 to exchange heat with the fresh air, wherein the cross-sectional area of ​​the triangular area 25 is larger than the cross-sectional area of ​​the limit block 24, thereby greatly reducing the resistance to the entry of the old air, and a triangular area is also provided between the old air heat exchange outlet and the old air output channel, thereby improving the exhaust efficiency and reducing noise.

[0030] In this embodiment, the area where the total heat exchanger is located is provided with a carbon dioxide detection sensor 9 on the side located at the old air heat exchange inlet. That is, a carbon dioxide detection sensor 9 for detecting indoor old air is provided in the triangular area 25 located on the side of the old air heat exchange inlet, so as to detect the indoor carbon dioxide concentration.

[0031] In this embodiment, the coarse filter 3 and the electrostatic precipitator 4 are placed horizontally and parallel to the horizontal plane of the total heat exchanger 2 to reduce resistance; the two oppositely arranged first inclined surfaces 22 are also parallel to each other.

[0032] In this embodiment, the high-efficiency filter 6 includes at least one group of filter units 61 arranged in an inverted V shape, and each filter unit includes two filter bodies arranged at an angle. Preferably, the high-efficiency filter of this embodiment includes three groups of filter units arranged in an inverted V shape, and the three groups of filter units are connected as a whole through a frame 62, that is, the frame is bent at the bottom of the three groups of filter units into a rectangular parallelepiped structure with a horizontal bottom surface and an open top surface, and the bottom surface of the rectangular parallelepiped is designed as a ventilation structure, which can allow airflow to enter the high-efficiency filter, and the top surface edge of the rectangular parallelepiped also tilts upward along the filter core 63 of a filter body to the top and then horizontally bends to the filter core of another filter body arranged at an angle, and then extends downward along the filter core, but does not extend to the bottom, but extends to a certain position and then horizontally bends to the filter core of the filter body of another group of filter units and extends upward again, until all the filter units are wrapped and then extended downward to the bottom and connected to the open part of the rectangular parallelepiped structure to form an integral high-efficiency filter, and the frame is glued and sealed with the filter core. The high-efficiency filter structure of the present embodiment, on the one hand, can increase the filtering area, reduce wind resistance, and extend the service life; and adjacent filter units are spaced apart by frame partitions to prevent fresh air from being directly output from the gaps between adjacent filter units without being filtered by the high-efficiency filter, thereby increasing the filtering efficiency; on the other hand, the overall structure connected by the frame is easy to install.

[0033] In this embodiment, the frame 62 wraps and seals the filter element 63, and the horizontally bent frame between adjacent filter units is used to separate the gaps between the filter units 61. The frame 62 of this embodiment is preferably designed as a plastic frame, which has higher precision, is easy to process and produce, and is easy to manufacture and form. It can be said that the combination of three groups of filter units in this embodiment can maximize the filtration area and dust capacity, reduce the wind resistance of the whole machine, and improve various performance parameters of the fresh air fan.

[0034] In this embodiment, the bottom, side and back of the machine body 1 are all provided with fresh air inlet 11 and exhaust air outlet 12, and the exhaust air inlet 13 and fresh air outlet 14 are provided at the top of the machine body 1. By providing the fresh air inlet 11 and the exhaust air outlet 12 at the bottom, side and back, on the one hand, the air intake and exhaust air volumes can be greatly increased, and on the other hand, it is convenient to install on different surfaces, making the installation method flexible and diverse.

[0035] In this embodiment, a control panel 15, a dust detection sensor 16 connected to the control panel, and a safety switch 17 are provided in the area where the fresh air blower is located. The control panel 15 is connected to various electrical components, such as the fresh air blower, the carbon dioxide detection sensor, etc., and can control the switch, wind speed and other parameters of the fresh air blower, automatically adjust the working state according to the indoor air quality, and keep the indoor air fresh. The dust detection sensor 16 is used to detect the dust concentration after the electrostatic precipitator removes the dust. In terms of safety performance, the fresh air blower adopts a reliable safety switch 17 to realize the power-off protection when the door is opened, that is, the safety switch transmits a signal to the control panel once the door is opened, and the control panel controls the power off, realizing the function of power off when the door is opened.

[0036] In this embodiment, a high-voltage power supply 41 is provided on one side of the electrostatic precipitator 4. The high-voltage power supply 41 adopts automatic high-voltage downshifting. When arcing and other adverse effects occur due to excessive dust on the electrostatic precipitator, the power supply 41 is powered down in time, and the user is reminded to clean the dust collector in time to protect the dust collector and improve the user experience.

[0037] In this embodiment, the fresh air fan can also be connected to a mobile phone APP, so that the user can check the indoor air quality data at any time and adjust the working state of the fresh air fan as needed. In addition, the fresh air fan can also be linked with other smart home devices to achieve integrated control of smart homes.

[0038] Since the working principle of air flow in the fresh air duct and the old air duct is already existing technology, it will not be described in detail here.

[0039] To sum up, on the one hand, the utility model can greatly increase the heat exchange area, reduce resistance, and thus reduce noise by designing the structure and angle of the full heat exchanger. In addition, combined with the overall structure, the airflow path has few turns, and the flow is relatively smooth, and the overall noise is greatly reduced. On the other hand, the setting of the high-efficiency filter greatly increases the filtration area and reduces resistance. It can be said that compared with traditional air purifiers, the utility model has better ventilation effect and lower noise, is suitable for various places such as homes, offices, and schools, and can effectively improve indoor air quality and improve living comfort.

Claims

1. A low-noise fresh air fan with full heat exchange, comprising a body and a fresh air channel and an old air channel arranged in the body, wherein a full heat exchanger is arranged between the fresh air channel and the old air channel; characterized in that: The total heat exchanger has a hexagonal structure and is tilted. The two opposite horizontal planes in the tilted total heat exchanger serve as the fresh air heat exchange inlet and the fresh air heat exchange outlet of the fresh air channel, and the two opposite first inclined planes serve as the old air heat exchange inlet and the old air heat exchange outlet of the old air channel; the length of the first inclined plane is greater than or equal to the length of the horizontal plane.

2. The low-noise fresh air blower with full heat exchange according to claim 1 is characterized in that: The lengths of the other two opposite second inclined surfaces of the total heat exchanger are smaller than the lengths of the horizontal surface and the first inclined surface.

3. The low-noise fresh air blower with full heat exchange according to claim 2 is characterized in that: In the area where the total heat exchanger is located, a limit block is provided at its diagonal position, the total heat exchanger is positioned between the two limit blocks, the second inclined surface of the total heat exchanger is in adaptive contact with the limit block, and a partition is provided between the first inclined surface and the horizontal plane.

4. The low-noise fresh air blower with full heat exchange according to claim 1, 2 or 3, characterized in that: A coarse-effect filter, an electrostatic precipitator, a fresh air fan and a high-efficiency filter are arranged in sequence along the air flow path in the fresh air channel, an exhaust fan is arranged along the old air flow path in the old air channel, and the two horizontal planes of the total heat exchanger are arranged between the coarse-effect filter and the electrostatic precipitator.

5. The low-noise fresh air blower with full heat exchange according to claim 4 is characterized in that: The coarse-effect filter and the electrostatic precipitator are respectively arranged in parallel with two horizontal planes of the total heat exchanger; a carbon dioxide detection sensor is arranged on the side of the old air heat exchange inlet in the area where the total heat exchanger is located.

6. The low-noise fresh air blower with full heat exchange according to claim 4 is characterized in that: The old air heat exchange inlet is connected to the old air input channel of the old air channel, and the old air heat exchange outlet is connected to the old air output channel of the old air channel. An exhaust fan is arranged in the old air output channel; the old air input channel is a long and narrow space, and the length of the old air input channel is greater than 1 / 2 of the length of the machine body.

7. The low-noise fresh air blower with full heat exchange according to claim 4 is characterized in that: The high efficiency filter comprises at least one group of filter units arranged in an inverted V shape, and each filter unit comprises two filter bodies arranged at an angle.

8. The low-noise fresh air blower with full heat exchange according to claim 7, characterized in that: When the high-efficiency filter includes a plurality of filter units, the filter units are spaced apart from each other, a frame is provided around the filter core of the filter body, and partitions are formed between adjacent filter units by bending the frame; the frame of the filter body is a plastic frame.

9. The low-noise fresh air blower with full heat exchange according to claim 1, 2 or 3, characterized in that: The top of the machine body is provided with a fresh air outlet and an exhaust air inlet, and at least one of the side surface, bottom surface and back surface of the machine body is provided with a fresh air inlet and an exhaust air outlet.

10. The low-noise fresh air blower with full heat exchange according to claim 4, characterized in that: A control panel, a dust detection sensor connected to the control panel, and a safety switch are provided in the area where the fresh air blower is located.

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