Fresh air mixing unit

Abstract

The utility model relates to a fresh air mixing unit. A machine body is provided with an air return port, an air outlet and a fresh air port, and a centrifugal fan is arranged in the machine body; an air mixing bin, a heat exchange bin and a detachable filter are arranged in the machine body; a heat exchanger communicated with an external cold source or heat source is arranged in the heat exchange bin; a return air volume regulator for controlling the air inlet volume is arranged on the return air inlet; and a fresh air volume regulator for controlling the air inlet volume is arranged on the fresh air port. The air conditioner is reasonable in structural design, the indoor return air volume and the outdoor fresh air volume are timely regulated and controlled through the air volume regulator for regulating and controlling the air inlet volume, preliminary remaining and mixing are carried out when the air is filtered by the filter in the air mixing bin, and the differences of temperature, humidity and the like of mixed airflow and indoor airflow are reduced; therefore, energy consumption of the heat exchanger for mixed airflow heat exchange is reduced, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of heat exchange of units, in particular to a fresh air mixed air unit. Background Art

[0002] With economic development, people's demands for a comfortable and hygienic working environment are becoming increasingly stringent. To meet this demand for fresh indoor air, fresh air systems are often added to existing air conditioning systems, increasing initial investment. Chinese patent document CN 204421261U discloses a simple, high-efficiency, filtered fresh air fan. The fresh air fan comprises a three-section housing, comprising, in order of air flow, a first filter chamber, a second filter chamber, and a fan chamber. The housing is provided with an air outlet and an air inlet. The fan chamber houses a fan. The first filter chamber houses a pleated filter cartridge, and the second filter chamber houses an electrostatic dust collector. The electrostatic dust collector houses a high-pressure plate and a dust collecting plate for dust capture. The fresh air fan has a compact design and a rational layout, resulting in low wind resistance, high filtration efficiency, and effective operation. However, current unidirectional fresh air systems on the market only draw air from the outside, directly carrying excessively high or low outdoor airflow into the room, causing sudden temperature changes in certain areas of the room, making them as hot or cold as the outside. This results in significant temperature differences between different indoor areas, causing discomfort. Utility Model Content

[0003] The purpose of the utility model is to provide a fresh air mixing unit, which is used to solve the problem that the existing fresh air system only takes in air from the outside, directly carries the outdoor high or low air flow into the room, causing the local temperature in the room to suddenly change to the same hot or cold as the outside, and the temperature difference between different areas in the room is large, causing discomfort to the human body.

[0004] In order to solve the above problems, the utility model provides a fresh air mixed air unit, which is provided with a return air inlet and an air outlet connecting the room and a fresh air inlet connecting the outside, and a centrifugal fan is provided in the body; the body is provided with a mixing air bin connecting the return air inlet and the fresh air inlet, a heat exchange bin connecting the mixing air bin and the air outlet, and a detachable filter for filtering the air flow entering the heat exchange bin; the heat exchange bin is provided with a heat exchanger connecting to an external cold source or heat source; the return air inlet is provided with a return air volume regulator for controlling its air intake volume; the fresh air inlet is provided with a fresh air volume regulator for controlling its air intake volume.

[0005] The fresh air mixing unit provided by the utility model also has the following technical features:

[0006] Furthermore, the return air inlet and the air outlet are respectively arranged at both ends of the body; the return air inlet and the air outlet are both arranged along the axial direction of the body; the fresh air inlet is arranged on one side of the body; the side wall where the fresh air inlet is located is perpendicular to the side wall where the return air inlet is located.

[0007] Furthermore, the fresh air volume regulator includes a fresh air guide plate hinged at the fresh air inlet and a first electric actuator for adjusting the deflection angle of the fresh air guide plate; the return air volume regulator includes a return air guide plate hinged at the return air inlet and a second electric actuator for adjusting the deflection angle of the return air guide plate.

[0008] Furthermore, a detachable first maintenance door is provided on one side of the machine body; the filter includes a horizontally slidable filter plate, an upper slide and a lower slide supporting the horizontal slide of the filter plate.

[0009] Furthermore, the upper slideway and the lower slideway are in the same vertical plane.

[0010] Furthermore, a removable second inspection door for sealing the heat exchanger is provided in the body; a water receiving trough is provided at the lower part of the heat exchanger in the heat exchange chamber; a drainage pipe connected to the outside is provided on the water receiving trough; the horizontal width of the water receiving trough is 1.8 to 2.5 times the thickness of the heat exchanger; the side of the water receiving trough close to the air mixing chamber is in the same vertical plane as the side of the heat exchanger; and a plurality of permeable plates are provided at the bottom of the heat exchanger for condensed water to enter the water receiving trough.

[0011] Furthermore, an air mixing device is provided in the air mixing silo; the air mixing device includes a fixed axis hinged in the air mixing silo, a plurality of first air mixing blade groups axially spaced apart along the fixed axis, and a plurality of second air mixing blade groups axially spaced apart along the fixed axis; any one of the second air mixing blade groups is arranged between two adjacent first air mixing blade groups; the blades of the second air mixing blade group and the blades of the first air mixing blade group are alternately arranged axially along the fixed axis; the blades of the first air mixing blade group and the blades of the adjacent second air mixing blade group are staggered.

[0012] The utility model has the following beneficial effects: the utility model has a reasonable structural design and a simple structure, and timely adjusts the indoor return air volume and the outdoor fresh air volume through the air volume regulator that regulates the air intake volume, and performs preliminary retention and mixing when passing through the filter in the mixed air bin, reducing the temperature, humidity and other differences between the mixed air flow and the indoor air flow, thereby reducing the energy consumption of the heat exchanger for heat exchange of the mixed air flow, reducing costs, ensuring that the difference in temperature and humidity between the air flow discharged from the air outlet and the original air flow in the room is reduced, ensuring that indoor personnel are in a constant environment, ensuring that the introduction of fresh air from the outside reduces the impact on the indoor environment; through the blades of the mixing blade group arranged at multiple intervals and staggered, without adding power equipment, the air flow in the machine body driven by the centrifugal fan is further mixed and flows, providing the mixing efficiency of the return air outlet airflow and the fresh air flow in the mixed air bin, ensuring the uniform distribution of the air flow, reducing the temperature difference between the mixed airflow and the indoor airflow, and reducing the energy consumption of subsequent heat exchange equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of an embodiment of the utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of an embodiment of the utility model;

[0016] Figure 4 For the embodiment of the utility model Figure 3 A magnified view of the structure of part A;

[0017] Figure 5 This is a cross-sectional view of the structure of an embodiment of the utility model;

[0018] Figure 6 This is a schematic structural diagram of an air mixing device according to an embodiment of the present utility model;

[0019] In the figure: 1-body, 11-return air inlet, 111-return air volume regulator, 112-return air guide plate, 113-second electric actuator, 12-air outlet, 13-fresh air inlet, 131-fresh air volume regulator, 132-fresh air guide plate, 133-first electric actuator, 14-centrifugal fan, 2-mixing air chamber, 21-first maintenance sealing door, 22-second maintenance sealing door, 3-heat exchange chamber, 31-water receiving trough, 32-drain pipe, 4-heat exchanger, 41-permeable plate, 5-filter, 51-filter plate, 52-upper slide, 53-lower slide, 6-air mixing device, 61-fixed shaft, 62-first mixing air blade group, 63-second mixing air blade group. DETAILED DESCRIPTION

[0020] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0021] like Figures 1 to 6In one embodiment of the fresh air mixed air unit of the present invention shown, the body 1 is provided with a return air port 11 and an air outlet 12 connecting to the room, and a fresh air port 13 connecting to the fresh air from the outside, and a centrifugal fan 14 is provided inside the body 1; the body 1 is provided with a mixing air bin 2 connecting to the return air port 11 and the fresh air port 13, a heat exchange bin 3 connecting to the mixing air bin 2 and the air outlet 12, and a detachable filter 5 for filtering the air flow entering the heat exchange bin 3; the heat exchange bin 3 is provided with a heat exchanger 4 connecting to an external cold source or heat source; the return air port 11 is provided with a return air volume regulator 111 for controlling its air intake volume; the fresh air port 13 is provided with a fresh air volume regulator 131 for controlling its air intake volume. By using the air volume regulator to control the air intake, the indoor return air volume and the outdoor fresh air volume are timely adjusted, and preliminary retention and mixing are carried out when the mixed air passes through the filter in the mixed air chamber to reduce the temperature, humidity and other differences between the mixed air flow and the indoor air flow, thereby reducing the energy consumption of the heat exchanger for heat exchange of the mixed air flow, reducing costs, ensuring that the difference in temperature and humidity between the air flow discharged from the air outlet and the original indoor air flow is reduced, ensuring that indoor personnel are in a constant environment, and ensuring that fresh air from the outside is introduced while reducing the impact on the indoor environment.

[0022] Specifically, the return air inlet 11 and the air outlet 12 are respectively arranged at both ends of the body 1; the return air inlet 11 and the air outlet 12 are both arranged along the axial direction of the body 1; the fresh air inlet 13 is arranged on one side of the body 1; the side wall where the fresh air inlet 13 is located is perpendicular to the side wall where the return air inlet 11 is located.

[0023] Specifically, the fresh air volume regulator 131 includes a fresh air deflector 132 hinged to the fresh air inlet 13 and a first electric actuator 133 for adjusting the deflection angle of the fresh air deflector 132. The return air volume regulator 111 includes a return air deflector 112 hinged to the return air inlet 11 and a second electric actuator 113 for adjusting the deflection angle of the return air deflector 112. The angle-adjustable deflector, controlled by the electric actuator, adjusts the deflection angle according to the actual indoor and outdoor temperature difference, thereby adjusting the incoming air volume ratio. While ensuring air intake, it also reduces the temperature difference between the incoming airflow and the original indoor airflow, ensuring a comfortable experience for indoor occupants.

[0024] Specifically, a detachable first maintenance door 21 is provided on one side of the machine body 1; the filter 5 includes a horizontally slidable filter plate 51, an upper slide 52 and a lower slide 53 supporting the horizontal slide of the filter plate 51.

[0025] Specifically, the upper slideway 52 and the lower slideway 53 are located in the same vertical plane.

[0026] Specifically, the housing 1 is equipped with a removable second inspection door 22 that seals off the heat exchanger 4. A water trough 31 is located below the heat exchanger 4 within the heat exchange chamber 3. A drain pipe 32 is provided on the water trough 31, connecting it to the outside world. The horizontal width of the water trough 31 is 1.8 to 2.5 times the thickness of the heat exchanger 4. The side of the water trough 31 near the air mixing chamber 2 is aligned with the side of the heat exchanger 4. The bottom of the heat exchanger 4 is equipped with multiple permeable panels 41 for condensate to enter the water trough 31. By designing the water trough wider than the heat exchanger itself, the system can fully receive condensate from the heat exchanger and adequately catch any condensate droplets that follow the airflow toward the outlet, minimizing the risk of condensate eroding the interior of the equipment.

[0027] Specifically, an air mixing device 6 is provided in the air mixing chamber 2; the air mixing device 6 includes a fixed shaft 61 hinged in the air mixing chamber 2, a plurality of first air mixing blade groups 62 axially spaced apart along the fixed shaft 61, and a plurality of second air mixing blade groups 63 axially spaced apart along the fixed shaft 61; any second air mixing blade group 63 is arranged between two adjacent first air mixing blade groups 62; the blades of the second air mixing blade group 63 and the blades of the first air mixing blade group 62 are arranged alternately along the fixed shaft 61; the blades of the first air mixing blade group 62 and the blades of the adjacent second air mixing blade group 63 are arranged in an interlaced manner. Through the blades of the plurality of interlaced air mixing blade groups, the air flow in the machine body driven by the centrifugal fan is further mixed and flowed without adding power equipment, thereby improving the mixing efficiency of the return air flow and the fresh air flow in the air mixing chamber, ensuring the uniform distribution of the air flow, reducing the temperature difference between the mixed air flow and the indoor air flow, and reducing the energy consumption of the subsequent heat exchange equipment.

[0028] Working principle: After the staff installs the equipment, they select the appropriate one according to the temperature difference between indoor and outdoor, adjust the deflection angle of the return air guide plate 112 and the fresh air guide plate 132, adjust the return air intake volume 11 and the fresh air intake volume 13 in time, and select the appropriate air intake ratio. When the temperature difference between indoor and outdoor is large, select less fresh air intake volume 13 and more return air intake volume 11. When the temperature difference between indoor and outdoor is small, select more fresh air intake volume 13 and less return air intake volume 11. While ensuring the intake of fresh air from the outside, the obvious temperature change caused by the fresh air from the outside to the indoor air flow is reduced. The fresh air from the fresh air outlet 13 and the return air outlet 11 are mixed, filtered, and heat exchanged before entering the room from the air outlet 12. The outdoor fresh air and the indoor return air are mixed first in the mixed air chamber 2, reducing the temperature difference between the fresh air and the indoor air flow, effectively reducing the energy consumption of the heat exchange equipment, and ensuring the temperature difference between the air outlet temperature of the air outlet 12 and the indoor temperature, thereby ensuring the comfort of the human body indoors.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A fresh air mixing unit, wherein a body (1) is provided with a return air inlet (11) and an air outlet (12) communicating with the interior of the room, and a fresh air inlet (13) communicating with fresh air from the outside, and a centrifugal fan (14) is provided in the body (1); characterized in that: The machine body (1) is provided with an air mixing chamber (2) connected to the return air port (11) and the fresh air port (13), a heat exchange chamber (3) connected to the air outlet (12), and a detachable filter (5) for filtering the air flow entering the heat exchange chamber (3); the heat exchange chamber (3) is provided with a heat exchanger (4) connected to an external cold source or heat source; the return air port (11) is provided with a return air volume regulator (111) for controlling the air intake volume thereof; and the fresh air port (13) is provided with a fresh air volume regulator (131) for controlling the air intake volume thereof.

2. The fresh air mixed air unit according to claim 1, characterized in that: The return air inlet (11) and the air outlet (12) are respectively arranged at two ends of the machine body (1); the return air inlet (11) and the air outlet (12) are both arranged along the axial direction of the machine body (1); the fresh air inlet (13) is arranged on one side of the machine body (1); the side wall where the fresh air inlet (13) is located is perpendicular to the side wall where the return air inlet (11) is located.

3. The fresh air mixed air unit according to claim 1, characterized in that: The fresh air volume regulator (131) comprises a fresh air guide plate (132) hingedly connected to the fresh air inlet (13) and a first electric actuator (133) for adjusting the deflection angle of the fresh air guide plate (132); the return air volume regulator (111) comprises a return air guide plate (112) hingedly connected to the return air inlet (11) and a second electric actuator (113) for adjusting the deflection angle of the return air guide plate (112).

4. The fresh air mixed air unit according to claim 1, characterized in that: A detachable first inspection door (21) is provided on one side of the machine body (1); the filter (5) comprises a filter plate (51) that can slide horizontally, an upper slideway (52) and a lower slideway (53) that support the horizontal slideway of the filter plate (51).

5. The fresh air mixed air unit according to claim 4, characterized in that: The upper slideway (52) and the lower slideway (53) are located in the same vertical plane.

6. The fresh air mixed air unit according to claim 1, characterized in that: A detachable second inspection door (22) for sealing the heat exchanger (4) is provided in the machine body (1); a water receiving trough (31) located at the lower part of the heat exchanger (4) is provided in the heat exchange chamber (3); a drainage pipe (32) communicating with the outside is provided on the water receiving trough (31); the horizontal width of the water receiving trough (31) is 1.8 to 2.5 times the thickness of the heat exchanger (4); the side of the water receiving trough (31) close to the air mixing chamber (2) is in the same vertical plane as the side of the heat exchanger (4); a plurality of water-permeable plates (41) for condensed water to enter the water receiving trough (31) are provided at the bottom of the heat exchanger (4).

7. The fresh air mixed air unit according to claim 1, characterized in that: An air mixing device (6) is provided in the air mixing chamber (2); the air mixing device (6) comprises a fixed shaft (61) hinged in the air mixing chamber (2), a plurality of first air mixing blade groups (62) arranged at intervals along the axial direction of the fixed shaft (61), and a plurality of second air mixing blade groups (63) arranged at intervals along the axial direction of the fixed shaft (61); any one of the second air mixing blade groups (63) is arranged between two adjacent first air mixing blade groups (62); the blades of the second air mixing blade group (63) and the blades of the first air mixing blade group (62) are arranged alternately along the axial direction of the fixed shaft (61); the blades of the first air mixing blade group (62) and the blades of the adjacent second air mixing blade group (63) are arranged in an alternating manner.

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