CN207778704U - Bidirectional flow complete-hot fresh air device - Google Patents

Abstract

The utility model discloses a kind of bidirectional flow complete-hot fresh air devices, belong to aeration device, product thickness existing for existing aeration device and internal duct resistance are larger, the utility model will be horizontal as the centrifugal blower of indoor breeze fan, outdoor breeze fan, even the axial direction of the centrifugal wind wheel of centrifugal blower is consistent with the thickness direction of babinet, thus product thickness is reduced, product thickness can reach 200mm 220mm.Also, the outdoor side chamber of babinet, indoor side chamber are separated and are respectively used to air inlet, exhaust for upper layer and lower layer, to reduce internal duct resistance, to while reducing product thickness, ensure same scavenging efficiency without increasing power of fan.

Description

Two-way flow full heat fresh air device

technical field

The utility model belongs to a fresh air device, in particular to a two-way flow all-heat fresh air device.

Background technique

The density of modern buildings is getting higher and higher, and the airtightness of housing is getting better and better. When the outdoors are cold in winter and the outdoors are hot in summer, the doors and windows are generally sealed, which leads to an increase in the indoor carbon dioxide content and makes people's living comfort more comfortable. decline. In order to improve living comfort, indoor ventilation is required. This ventilation will discharge indoor energy to the outside, resulting in energy loss; it will also transport polluted air indoors when the outdoor air quality is not good. Therefore, heat recovery and outdoor PM2.5 filtration are carried out while ventilating. This requires a whole house heat exchanger to achieve.

But in the bathroom, because there is no heating in the south, the temperature in the north is sometimes very low before the heating is stopped in April and November, which is not suitable for bathing. Therefore, current customers generally install Yuba when they are newly renovated.

In order to reduce customers' repeated purchase, installation and maintenance of products, the motor and fan of the two products can be shared at the same time. By integrating these two products, the overall cost of customers will be reduced.

Similar products currently on the market have a thickness of more than 220mm, which requires a large space, especially in the height direction of the house, and the internal air duct resistance is large, resulting in high power consumption of the motor.

Utility model content

The technical problem to be solved and the technical task proposed by the utility model are to overcome the defects of the existing fresh air device, such as product thickness and internal air duct resistance, and provide a two-way flow full-heating system with low product thickness and internal air duct resistance. Fresh air device.

In order to achieve the above purpose, the two-way flow full-heat fresh air device of the present invention includes a box body, and the side wall of the box body is provided with an outdoor air inlet connection pipe, an indoor air outlet connection pipe, an indoor return air connection pipe, and an outdoor air exhaust connection pipe. The box is equipped with an outdoor air supply fan, an indoor air supply fan, and a two-way flow total heat exchanger. The two-way flow total heat exchanger has an air inlet channel and an air outlet channel that are isolated from each other and can perform heat exchange. Yes:

The inner cavity of the box body is divided into an outdoor side cavity and an indoor side cavity by the bidirectional flow total heat exchanger;

Both the outdoor side cavity and the indoor side cavity are separated into upper and lower layers;

The inlet end of the air inlet channel and the outlet end of the air outlet channel are located on different layers of the outdoor side chamber, and the outlet end of the air inlet channel and the inlet end of the air outlet channel are located in the indoor side cavity different layers of

The inlet end of the air inlet channel is in a different layer from the outlet end of the air inlet channel, and the inlet end of the air outlet channel is in a different layer from the outlet end of the air outlet channel;

The indoor air supply fan is a centrifugal fan and is located in the indoor side cavity, the axial direction of the centrifugal wind wheel of the indoor air supply fan is consistent with the thickness direction of the box body, and the air inlet of the indoor air supply fan is It communicates with the outlet end of the air inlet channel, and the air outlet of the indoor air supply fan communicates with the indoor air outlet connecting pipe;

The outdoor air supply fan is a centrifugal fan and is located in the outdoor side chamber, the axial direction of the centrifugal wind wheel of the outdoor air supply fan is consistent with the thickness direction of the box body, and the air inlet of the outdoor air supply fan It communicates with the outlet end of the air outlet channel, and the air outlet of the outdoor air supply fan communicates with the outdoor air exhaust connecting pipe;

The inlet end of the air outlet channel communicates with the indoor return air connecting pipe;

The inlet end of the air inlet channel communicates with the outdoor air inlet connecting pipe.

As a preferred technical means: the box body includes an upper cover plate and a lower cover plate, and the outdoor side cavity and the indoor side cavity are separated into upper and lower sides by a transverse partition between the upper cover plate and the lower cover plate. two floors.

As a preferred technical means: the partition is an independent plate or/and a plate constituting the volute of the centrifugal wind wheel.

As a preferred technical means: the inlet end of the air inlet channel is provided with a filtering device.

As a preferred technical means: the side wall of the box body is provided with a maintenance hole and a maintenance cover plate covering the maintenance hole, and the filter device and the two-way flow total heat exchanger are slidably assembled on the said maintenance hole. inside the box.

As a preferred technical means: the box is provided with a bypass channel connecting the indoor return air connection pipe and the air inlet of the outdoor air supply fan, and the bypass channel is equipped with a device for controlling the bypass channel . The first switching damper for closing or opening the air outlet channel.

As a preferred technical means: the inlet end of the bypass channel is adjacent to the inlet end of the air outlet channel, and the first switching damper is located at the adjacent position between the inlet end of the bypass channel and the inlet end of the air outlet channel.

As a preferred technical means: the outdoor side cavity is provided with an electric heating device, the side wall of the box is provided with a bathroom air outlet connection pipe and a bathroom return air connection pipe, and the bathroom air outlet connection pipe is adjacent to the outdoor exhaust pipe. Air connection pipe, the bathroom return air connection pipe is connected to the air inlet of the outdoor air supply fan, the bathroom air outlet connection is connected to the air outlet of the outdoor air supply fan, and the electric heating device is located in the Between the bathroom air outlet pipe and the air outlet of the outdoor air supply fan, between the outdoor air exhaust pipe and the bathroom air outlet pipe, there is a device for controlling the closing or opening of the outdoor air exhaust pipe and the bathroom air outlet pipe. Second switch damper.

As a preferred technical means: the electric heating device includes a bracket, an electric heater located on the bracket between the bathroom air outlet connection pipe and the air outlet of the outdoor air supply fan, and the second switching damper assembly on the bracket.

As a preferred technical means: the bathroom return air connection is adjacent to the outlet end of the bypass channel, and the bracket is provided with a third valve for controlling the bathroom return air connection and the closing or opening of the bypass channel. Switch damper.

As a preferred technical means: the thickness of the box is 200mm-220mm.

In the utility model, the centrifugal fan used as the indoor air supply fan and the outdoor air supply fan is placed horizontally, that is, the axial direction of the centrifugal fan of the centrifugal fan is consistent with the thickness direction of the box body, thereby reducing the product thickness, and the product thickness can reach 200mm -220mm. In addition, the outdoor side cavity and the indoor side cavity of the box are separated into upper and lower layers for air intake and exhaust respectively, so as to reduce the internal air duct resistance, thereby ensuring the same ventilation while reducing the thickness of the product efficiency without increasing fan power.

Description of drawings

Fig. 1 is an axonometric view of the two-way flow full-heat fresh air device of the present invention;

Fig. 2 is an isometric view of the structure shown in Fig. 1 with the upper cover removed;

Fig. 3 is an exploded schematic view of the two-way flow full-heat fresh air device with the structure shown in Fig. 1;

Fig. 4 is an exploded schematic view of the heating device in the structure shown in Fig. 2;

Fig. 5 is a schematic diagram of an orthographic projection of the structure shown in Fig. 1;

Fig. 6 is A-A to sectional view in Fig. 5;

Fig. 7 is the B-B direction sectional view in Fig. 5;

Fig. 8 is the working schematic diagram of the two-way flow total heat exchanger of the present invention;

Explanation of symbols in the figure:

100-box, 101-outdoor air inlet pipe, 102-indoor air outlet pipe, 103-indoor return air pipe, 104-outdoor exhaust air pipe, 105-outdoor side chamber, 106-indoor side chamber, 107-outdoor side upper Chamber, 108-outdoor lower chamber, 109-indoor upper chamber, 110-indoor lower chamber, 111-upper cover, 112-bypass channel, 113-first switching damper, 114-bathroom air outlet connection, 115 - Bathroom return air connection;

200-outdoor air supply fan, 201-centrifugal wind wheel of outdoor air supply fan;

300-indoor air supply fan, 301-centrifugal wind wheel of indoor air supply fan;

400-two-way flow full heat exchanger;

500 - filter device;

600-electric heating device, 601-the second switching damper, 602-support, 603-electric heater, 604-the third switching damper.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

The two-way flow full-heat fresh air device shown in Figure 1-3 and Figure 5-7 includes a box body 100, the box body is preferably a sheet metal structure, and the side wall of the box body is provided with an outdoor air inlet connection 101 and an indoor air outlet connection 102 , indoor return air connecting pipe 103, outdoor exhaust air connecting pipe 104, outdoor air supply fan 200, indoor air supply fan 300, two-way flow full heat exchanger 400 are arranged in the box, and the two-way flow full heat exchanger has mutual isolation and can carry out The air inlet channel and the air outlet channel of the heat exchange, the air inlet channel and the air outlet channel are composed of several gaps;

The inner cavity of the box body 100 is divided into an outdoor side cavity 105 and an indoor side cavity 106 by a two-way flow total heat exchanger;

The outdoor side chamber 105 and the indoor side chamber 106 are separated into upper and lower layers, the outdoor side chamber 105 is divided into the outdoor upper chamber 107 and the outdoor lower chamber 108, and the indoor side chamber 106 is separated into the indoor upper chamber 109. The lower chamber 110 on the inner side of the chamber;

As shown in Figure 8, the inlet end of the air inlet channel and the outlet end of the air outlet channel are located in different layers of the outdoor side chamber, specifically, the inlet end of the air inlet channel is located in the lower chamber 108 of the outdoor side, and the outlet end of the air outlet channel is located in The upper chamber 107 on the outdoor side; the outlet end of the air inlet passage and the inlet end of the air outlet passage are located on different layers of the indoor side chamber, specifically, the outlet end of the air inlet passage is located at the upper chamber 109 on the indoor side, and the inlet end of the air outlet passage is located at Indoor side lower cavity 110; therefore, the inlet end of the air inlet channel and the outlet end of the air inlet channel are in different layers, and the inlet end of the air outlet channel is in different layers from the outlet end of the air outlet channel, thus intersecting with the air inlet channels, The air outlet channel is adapted to the air outlet channel; during specific implementation, the inlet end of the air inlet channel can also be located in the upper chamber on the outdoor side, the outlet end of the air outlet channel is located in the lower chamber on the outdoor side, the outlet end of the air inlet channel is located in the lower chamber on the indoor side, and the outlet The inlet end of the air channel is located in the upper cavity on the indoor side, which is equivalent to turning the structure shown in Figure 5-7 over;

The indoor air supply fan 300 is a centrifugal fan and is located in the indoor side chamber 106. The axial direction of the centrifugal wind wheel 301 of the indoor air supply fan is consistent with the thickness direction of the box body. They are all open to communicate with the upper cavity 109 on the indoor side, and the air outlet of the indoor air supply fan 300 communicates with the indoor air outlet connecting pipe 102;

The outdoor air supply fan 200 is a centrifugal fan and is located in the outdoor side cavity 105. The axial direction of the centrifugal wind wheel 201 of the outdoor air supply fan is consistent with the thickness direction of the box body. They are all open to communicate with the upper chamber 107 on the outdoor side, and the air outlet of the outdoor air supply fan 200 communicates with the outdoor air exhaust connecting pipe 104;

The inlet end of the air outlet channel communicates with the indoor return air connecting pipe 103;

The inlet end of the air inlet channel communicates with the outdoor air inlet connecting pipe 104 .

According to the above structure, under the action of the indoor air supply fan, the path of outdoor air flowing from outdoor to indoor is: the outdoor air inlet connecting pipe, the lower chamber on the outdoor side, the inlet end of the air inlet channel, the air inlet channel, the outlet end of the air inlet channel, The upper cavity on the indoor side, the air inlet of the indoor air supply fan, the air outlet of the indoor air supply fan, and the indoor air outlet pipe (the circulation path is shown by a dotted line in Figure 6 and Figure 8); Below, the path for indoor air to be exhausted from the room to the outside is: the indoor air return pipe, the lower chamber on the indoor side, the inlet end of the air outlet channel, the air outlet channel, the outlet end of the air outlet channel, the upper chamber on the outdoor side, and the outdoor air supply fan The air inlet of the outdoor air supply fan, the air outlet of the outdoor air supply fan, and the outdoor exhaust air connection (the part of the flow path in Figure 7 and Figure 8 is indicated by a double-dot dash line). Meanwhile, the air flowing into the room and the air discharged to the outside exchange energy when flowing through the two-way flow total heat exchanger.

The two-way flow full-heat fresh air device makes the axial direction of the centrifugal fan of the centrifugal fan consistent with the thickness direction of the box body, thereby reducing the product thickness, and the product thickness can reach 200mm-220mm. In addition, the outdoor side cavity and the indoor side cavity of the box are separated into upper and lower layers for air intake and exhaust respectively, so as to reduce the internal air duct resistance, thereby ensuring the same ventilation while reducing the thickness of the product efficiency without increasing fan power.

Specifically, the box body includes an upper cover plate 111 and a lower cover plate (not shown in the figure). two floors. The separator is an independent plate or/and a plate constituting the volute of the centrifugal wind wheel. Boards The boards are preferably foam boards to reduce the weight of the overall product.

In order to purify the outdoor air flowing from outdoor to indoor, a filter device 500 is provided at the inlet end of the air inlet passage, specifically, the filter device is provided in the lower chamber on the outdoor side. The filtering device preferably includes a coarse-effect metal filter screen and an H13 grade HEPA filter screen.

In order to facilitate maintenance, an inspection hole and an inspection cover covering the inspection hole are provided on the side wall of the box body. The filter device and the two-way flow full heat exchanger are slidably assembled in the box body through the inspection hole. Therefore, the filter device and the two-way flow full heat exchanger are all made in an assembly form so as to be taken out and put back.

In spring and autumn, due to the small indoor and outdoor temperature difference, if the indoor air is allowed to exchange heat with the outdoor air at this time, the efficiency is very low, and the internal air duct resistance will be increased when passing through the two-way flow full heat exchanger, and the power of the fan will be increased. electricity bills. In order to avoid this situation, a bypass channel 112 connecting the indoor return air connection pipe and the air inlet of the outdoor air supply fan is provided in the box, and the bypass channel is equipped with a first switch for controlling the closing or opening of the bypass channel and the air outlet channel. One switch damper 113. By switching the first switching damper, the indoor return air connecting pipe can be connected to the bypass channel, and the air outlet channel can be closed, or connected to the air outlet channel, and the bypass channel can be closed. Preferably, the inlet end of the bypass channel is adjacent to the inlet end of the air outlet channel, the first switching damper is located adjacent to the inlet end of the bypass channel and the inlet end of the air outlet channel, and the switching position of the first switching damper is driven by the control motor.

In order to endow the product with a heating function, an electric heating device 600 is provided in the outdoor side cavity, and a bathroom air outlet connection 114 and a bathroom return air connection 115 are provided on the side wall of the cabinet. The bathroom outlet connection is adjacent to the outdoor exhaust connection, and the bathroom return air The connecting pipe is connected to the air inlet of the outdoor air supply fan, and the bathroom air outlet pipe is connected to the air outlet of the outdoor air supply fan. The electric heating device is located between the bathroom air outlet connecting pipe and the air outlet of the outdoor air supply fan. A second switching damper 601 for controlling the closing or opening of the outdoor exhaust air connection and the bathroom air outlet connection is provided between the connection pipes. When the second switching damper closes the outdoor exhaust pipe, the air outlet of the outdoor air supply fan is connected with the bathroom air outlet pipe to realize the air circulation and heating of the bathroom; when the second switching damper closes the bathroom air outlet pipe, the air outlet of the outdoor air supply fan It is connected with the outdoor exhaust pipe to exhaust the indoor air to the outside. The switching position of the second switching damper is driven by controlling the motor.

Specifically, as shown in Figure 4, the electric heating device 600 includes a bracket 602, an electric heater 603 located on the bracket between the bathroom air outlet connection pipe and the air outlet of the outdoor air supply fan, and the second switching damper is assembled on the bracket . The bathroom return air connection is adjacent to the outlet of the bypass passage, and a third switching damper 604 is provided on the bracket for controlling the bathroom return air connection 115 and the bypass passage to close or open. In the bathroom heating and bathroom ventilation mode, the third switching damper 604 closes the bypass channel 112 and opens the bathroom return air connection 115, so that the bathroom air enters the inside of the cabinet, and the bathroom air is heated and then sent back to the bathroom when heating. Exhaust to the outside through the outdoor air intake connection 104; in bypass mode, the third switching damper 604 opens the bypass channel 112 and closes the bathroom return air connection 115 to prevent bathroom air from entering the cabinet.

The product can work in the following modes:

1. Full hot fresh air mode

The outdoor air flows sequentially through the outdoor air inlet connection pipe, the lower chamber on the outdoor side, the filter device, the inlet end of the air inlet channel, the air inlet channel, the outlet end of the air inlet channel, the upper chamber on the indoor side, the air inlet of the indoor air supply fan, and the indoor The air outlet of the air supply fan, the indoor air outlet pipe, and finally enter the room; the indoor air flows through the indoor return air pipe, the lower chamber of the indoor side, the inlet end of the air outlet channel, the air outlet channel, the outlet end of the air outlet channel, and the room. The outer upper cavity, the air inlet of the outdoor air supply fan, the air outlet of the outdoor air supply fan, the outdoor exhaust air connection pipe, and finally discharge to the outside. During this period, the air flowing into the room and the air exhausted to the outside exchange energy and humidity when flowing through the two-way flow total heat exchanger, and the filter device filters PM2.5, hair, harmful colonies and other substances in the air.

bypass mode

In spring and autumn, due to the small indoor and outdoor temperature difference, if the indoor air is allowed to exchange heat with the outdoor air at this time, the efficiency is very low, and the internal air duct resistance will be increased when passing through the two-way flow full heat exchanger, and the power of the fan will be increased. electricity bills. At this time, the outdoor air flows sequentially through the outdoor air inlet connection pipe, the lower chamber on the outdoor side, the filter device, the inlet end of the air inlet channel, the air inlet channel, the outlet end of the air inlet channel, the upper chamber on the indoor side, and the inlet port of the indoor air supply fan. The air outlet, the air outlet of the indoor air supply fan, the indoor air outlet pipe, and finally enter the room; the indoor air flows through the indoor return air pipe, the bypass channel, the upper chamber on the outdoor side, the air inlet of the outdoor air supply fan, and the outdoor air supply fan. The air outlet, the outdoor exhaust pipe, and the final discharge to the outside, bypassing the two-way flow full heat exchanger, no heat exchange, reducing wind resistance and saving energy consumption.

Bathroom heating fresh air mode

The outdoor air flows sequentially through the outdoor air inlet connection pipe, the lower chamber on the outdoor side, the filter device, the inlet end of the air inlet channel, the air inlet channel, the outlet end of the air inlet channel, the upper chamber on the indoor side, the air inlet of the indoor air supply fan, and the indoor The air outlet of the air supply fan, the indoor air outlet pipe, and finally enter the bathroom; the cold air in the bathroom flows through the bathroom return air pipe, the upper chamber on the outdoor side, the air inlet of the outdoor air supply fan, the air outlet of the outdoor air supply fan, The electric heater, the bathroom outlet take over, and finally flow back to the bathroom to achieve the purpose of heating the bathroom and supplementing fresh air.

Fresh air mode for bathroom ventilation

In this mode, the electric heater does not work, and the air in the bathroom flows through the bathroom return air connection, the upper chamber on the outdoor side, the air inlet of the outdoor air supply fan, the air outlet of the outdoor air supply fan, the outdoor exhaust air connection, and finally exhausts to the outside. .

Claims (11)

1. Two-way flow full-heat fresh air device, including a box (100), the side wall of the box is provided with an outdoor air inlet connection (101), an indoor air outlet connection (102), an indoor return air connection (103), an outdoor Exhaust air connecting pipe (104), the box is equipped with an outdoor air supply fan (200), an indoor air supply fan (300), a two-way flow total heat exchanger (400), and the two-way flow total heat exchanger has mutual The air inlet channel and the air outlet channel which are isolated and capable of heat exchange are characterized by: The inner cavity of the box is divided into an outdoor side cavity (105) and an indoor side cavity (106) by the bidirectional flow total heat exchanger; The outdoor side cavity (105) and the indoor side cavity (106) are both separated into upper and lower layers; The inlet end of the air inlet channel and the outlet end of the air outlet channel are located on different layers of the outdoor side chamber, and the outlet end of the air inlet channel and the inlet end of the air outlet channel are located in the indoor side cavity different layers of The inlet end of the air inlet channel is in a different layer from the outlet end of the air inlet channel, and the inlet end of the air outlet channel is in a different layer from the outlet end of the air outlet channel; The indoor air supply fan (300) is a centrifugal fan located in the indoor side chamber (106), and the axial direction of the centrifugal fan (301) of the indoor air supply fan is consistent with the thickness direction of the box body, The air inlet of the indoor air supply fan communicates with the outlet end of the air inlet channel, and the air outlet of the indoor air supply fan communicates with the indoor air outlet connecting pipe; The outdoor air supply fan (200) is a centrifugal fan located in the outdoor side chamber (105), and the axial direction of the centrifugal fan (201) of the outdoor air supply fan is consistent with the thickness direction of the box body, The air inlet of the outdoor air supply fan communicates with the outlet end of the air outlet channel, and the air outlet of the outdoor air supply fan communicates with the outdoor air exhaust connection; The inlet end of the air outlet channel communicates with the indoor return air connecting pipe (103); The inlet end of the air inlet channel communicates with the outdoor air inlet connecting pipe (101). 2. The two-way flow full-heat fresh air device according to claim 1, characterized in that: the box body includes an upper cover plate (111) and a lower cover plate, and the outdoor side cavity and the indoor side cavity are located in the The transverse partition between the upper cover plate and the lower cover plate is separated into upper and lower layers. 3. The two-way flow full-heat fresh air device according to claim 2, characterized in that: the partition is an independent plate or/and a plate constituting the volute of the centrifugal wind wheel. 4. The two-way flow full-heat fresh air device according to claim 1, characterized in that: a filter device (500) is provided at the inlet end of the air inlet channel. 5. The two-way flow full-heat fresh air device according to claim 4, characterized in that: the side wall of the box body is provided with an inspection hole and an inspection cover covering the inspection hole, and the filter device (500 ), a two-way flow total heat exchanger (400) is slidably assembled in the box through the inspection hole. 6. The two-way flow full-heat fresh air device according to claim 1, characterized in that: the box is provided with a bypass channel (112 ), the bypass channel is configured with a first switching damper (113) for controlling the closing or opening of the bypass channel and the air outlet channel. 7. The two-way flow full-heating fresh air device according to claim 6, characterized in that: the inlet end of the bypass channel is adjacent to the inlet end of the outlet channel, and the first switching damper is located at the side of the bypass channel. The adjoining position between the entrance end of the passage and the entrance end of the air outlet passage. 8. The two-way flow full-heat fresh air device according to claim 6, characterized in that: the outdoor side cavity (105) is provided with an electric heating device (600), and the side wall of the box is provided with a bathroom outlet Air connection pipe (114), bathroom return air connection pipe (115), the bathroom air outlet connection pipe (114) is adjacent to the outdoor exhaust air connection pipe (104), and the bathroom return air connection pipe is connected to the outdoor air supply pipe The air inlet of the fan, the bathroom air outlet connecting pipe is connected to the air outlet of the outdoor air supply fan, the electric heating device is located between the bathroom air outlet connecting pipe and the air outlet of the outdoor air supply fan, the A second switching damper (601) for controlling the closing or opening of the outdoor exhaust connecting pipe and the bathroom air outlet connecting pipe is provided between the outdoor air exhaust connecting pipe and the bathroom air outlet connecting pipe. 9. The two-way flow full-heating fresh air device according to claim 8, characterized in that: the electric heating device (600) includes a bracket (602), which is located on the bracket between the bathroom outlet pipe and the outdoor An electric heater (603) between the air outlets of the blower fan, and the second switching damper (601) is assembled on the bracket (602). 10. The two-way flow full-heat fresh air device according to claim 9, characterized in that: the bathroom return air connecting pipe (115) is adjacent to the outlet end of the bypass channel (112), and is installed on the bracket There is a third switching damper (604) for controlling the bathroom return air connecting pipe (115) and closing or opening the bypass channel. 11. The two-way flow full-heat fresh air device according to claim 1, characterized in that: the thickness of the box is 200mm-220mm.