CN101788178A - Building Fresh Air Heat Exchange System - Google Patents

Abstract

The invention discloses a new air heat exchange system of a building, wherein the building comprises a plurality of rooms, and the new air heat exchange system is characterized by comprising: the air outlet pipe of the air supply device is respectively communicated with the upper parts of all rooms of the building; the outer wall of the building room is provided with a heat exchange space interlayer, and one side of the heat exchange space interlayer is communicated with the inside of the room through an air outlet hole; the other side of the heat exchange space interlayer is communicated with the outside through an exhaust hole; the air outlet hole and the air exhaust hole are arranged on the outer wall at different heights. According to the invention, the air supply device arranged in the building room and the outer wall are provided with the heat exchange space, so that air is fed into the heat exchange space, the air exchanges heat with hot air in the outer wall, and the hot air is exhausted to the outside from the exhaust hole.

Description

Building Fresh Air Heat Exchange System

【Technical field】

The invention relates to a building fresh air heat exchange system, in particular to a building fresh air heat exchange system capable of exchanging and renewing the air in the building and exchanging heat for the hot air in the building wall interlayer.

【Background technique】

Ventilation and heat exchange methods for existing buildings include:

1. Open windows for ventilation and heat exchange: But this most direct and primitive method of ventilation and exhaust is obviously not advisable and has many disadvantages. Open windows for ventilation and blind airflow. The chaotic airflow may bring the peculiar smell of the bathroom and kitchen into the living room and bedroom, and entrain a lot of dust. While affecting indoor cleanliness, noise pollution cannot be avoided. In addition, opening windows when using cold and heat source facilities will cause energy waste, which is obviously not advisable in this modern society that pays attention to energy conservation.

2. Use a ventilation fan to exchange heat: However, although the traditional ventilation fan has a large instantaneous exhaust air volume, it cannot continuously eliminate indoor odors. The resistance increases, and the effect is greatly reduced. In addition, the noise problem of traditional ventilating fans will continue to aggravate as the use time increases, and the machine itself is easily damaged, resulting in high follow-up maintenance costs.

3. Heat exchange of small household central air conditioners: Although it has a return air outlet, it cannot fully exchange with outdoor air. Because there is no exhaust, it is difficult for fresh air to be sent into the positive pressure area. Although it has a little fresh air, it cannot completely improve the indoor air quality. Dirty air cannot be quickly exhausted outside.

The indoor ventilation and heat exchange methods of the above-mentioned various buildings, some have poor heat exchange effect, some have high cost, and some need to add other high-energy-consuming equipment, which cannot achieve the purpose of energy saving and emission reduction, and some are noisy.

【Content of invention】

The object of the present invention is to overcome the shortcomings of the prior art, and provide a building fresh air heat exchange system with low cost, good heat exchange effect, low noise and good heat exchange effect.

The purpose of the present invention is achieved like this:

Building fresh air heat exchange system, the building includes multiple rooms, characterized in that the fresh air heat exchange system includes:

Air supply device, the air outlet pipe of the air supply device communicates with the upper part of each room of the building respectively;

The outer wall of the building room is provided with a heat exchange space interlayer, one side of the heat exchange space interlayer communicates with the interior of the room through an air outlet; the other side of the heat exchange space interlayer communicates with the outside world through an exhaust hole; The air outlets and exhaust holes are set at different heights on the outer wall.

The above-mentioned building fresh air heat exchange system is characterized in that the outer wall includes an inner wall, an outer wall, and connecting bricks connecting the inner wall and the outer wall, and the interlayer of the heat exchange space is composed of an inner wall and an outer wall , the air outlet hole is set on the inner wall, and the exhaust hole is set on the outer wall.

The above-mentioned building fresh air heat exchange system is characterized in that the number of said air outlet is one, which is set at a height of 0.5-2.5 meters from the ground.

The above-mentioned building fresh air heat exchange system is characterized in that the number of said exhaust holes is 1-2, which are set at a height of 0.3-0.6 meters from the ground.

The building fresh air heat exchange system described above is characterized in that the number ratio of the air outlet holes to the air exhaust holes is 1:3.

The above-mentioned building fresh air heat exchange system is characterized in that the exhaust hole is set at a height of 3.2 meters from the ground, and the number of the exhaust hole is one; the exhaust hole is set at a height of At a height of 0.3 meters above the ground, there are 2 exhaust holes.

The above-mentioned building fresh air heat exchange system is characterized in that the size of the exhaust holes is 240mm×53mm×60-100mm.

The building fresh air heat exchange system described above is characterized in that the air outlet holes are arranged on the inner side of the outer wall, and the air exhaust holes are arranged on the outer side of the outer wall.

The building fresh air heat exchange system described above is characterized in that the air supply device is a fan.

The present invention sends air into the heat exchange space through the air supply device provided in the building room and the heat exchange space on the outer wall, so that the air can exchange heat with the hot air in the outer wall, and the hot air can be discharged from the exhaust hole. The discharge to the outside not only has a simple structure and low cost, but also has low energy consumption and low noise, which fully conforms to the national energy-saving and emission-reduction policy.

【Description of drawings】

Fig. 1 is the structural representation of building fresh air heat exchange system of the present invention;

Fig. 2 is the perspective view of building exterior wall of the present invention,

Fig. 3 is a partial sectional view of the building exterior wall of the present invention.

【Detailed ways】

A building fresh air heat exchange system, the building includes a plurality of rooms, including rooms separated from the outside world, the fresh air heat exchange system includes an air supply device 1, and the air supply device 1 is a fan; the air outlet pipe of the air supply device 1 11 respectively communicate with the upper part of each room of the building; the outer wall of the room separated from the outside world of the building is provided with a heat exchange space interlayer 2, and one side of the heat exchange space interlayer 2 is connected to the interior of the room through the air outlet 21 The other side of the interlayer 2 in the heat exchange space communicates with the outside world through the air outlet 22; the air outlet 21 is arranged on the inner side of the outer wall, and the air outlet 22 is arranged on the outer side of the outer wall. The air outlet hole 21 and the air exhaust hole 22 are arranged at different heights on the outer wall.

As shown in Figure 2, the outer wall includes an inner wall 200, an outer wall 201, and connecting bricks 202 connecting the inner wall 200 and the outer wall 201, and the heat exchange space interlayer 2 is composed of the inner wall 200 and the outer wall 201. In this configuration, the air outlet hole 21 is arranged on the inner wall 200 , and the air exhaust hole 22 is arranged on the outer wall 201 .

The quantity of the air outlet 21 is one, and it is arranged at a height of 0.5-2.5 meters from the ground. The number of exhaust holes 22 is 1-2, which are set at a height of 0.3-0.6 meters from the ground.

When the exhaust hole 22 is set at a height of 3.2 meters from the ground, the number of the exhaust hole 22 is one; when the exhaust hole 22 is set at a height of 0.3 meters from the ground, the number of the exhaust hole 22 is two.

In order to make the ventilation air space of the exterior wall have a better ventilation effect and take away part of the heat transferred from the outside to the interior, it is necessary to analyze the position and area of the air outlet on the inner side of the outer wall and the outlet on the outer side. Through the following examples, the flow of the interlayer 2 in the heat exchange space and the heat transfer with the wall are calculated and analyzed using computational fluid dynamics (CFD) software. The thicknesses of the inner wall 200 and the outer wall 201 of the outer wall are both 60-100mm.

The size of the air outlet is 480mm×53mm×60-100mm, the position of the air outlet is set at 1.5m above the ground, the size of the air outlet is 240mm×53mm×60-100mm; the number of the air outlet is 2, one of which is It is set at a height of 0.3m from the ground, and the other air outlet is set at a height of 3.2m from the ground. In this case, the airflow flows into the interlayer of the wall from the inner air outlet at an average speed of 0.36m/s, and after encountering the outer wall 201, the airflow is divided into two streams, upward and downward. Among them, the airflow speed along the wall surface gradually decays from 0.2m/s to zero, and the airflow flowing downward is about 0.36m/s. After the airflow meets the ground, it is divided into two streams. Next, the airflow flows out from the topmost air outlet 22 at a speed of 0.82m/s.

Due to the setting of the air outlet 22 on the top outside of the wall, the air flow in the upper area of the wall increases the activity area of the interlayer 2 of the heat exchange space, and the air velocity is between 0.12 and 0.2m/s. Only the top two sides of the interlayer 2 of the heat exchange space Because the first corner is far away from the top air outlet 22, the air flow is the worst and is in a static state. The air flow in the wall area below the air outlet 22 is better, the wind speed in the area near the air outlet 21 and the air outlet 22 is relatively high, between 0.3 and 0.4m/s, and the wind speed in other areas is 0.1 to 0.2m/s s, greatly increasing the convective heat transfer effect of the heat exchange space.

Therefore, the ratio of the number of indoor air outlets on the exterior wall to the outdoor air outlets on the exterior wall is 1:3, and one air vent is set on the outer wall 201 of the outer wall at a height of 3.2m from the ground, and the outer wall of the outer wall at a height of 0.3m from the ground Two ventilation openings are provided on the wall 201, and the area of each outdoor ventilation opening on the outer wall is recommended to be 240mm×53mm×60-100mm.

The interlayer 2 of the heat exchange space exchanges heat with the inner and outer wall blocks and takes away part of the heat, reducing the temperature of the inner wall of the outer wall. The maximum temperature of the inner wall surface of the outer wall is 34.93-34.95°C, which meets the requirements of the "Code for Thermal Design of Civil Buildings" (GB 50176-93).

Claims (9)

1. Building fresh air heat exchange system, said building includes multiple rooms, characterized in that the fresh air heat exchange system includes: Air supply device (1), the air outlet pipe (11) of the air supply device (1) communicates with the upper part of each room of the building respectively; The outer wall of the building room is provided with a heat exchange space interlayer (2), and one side of the heat exchange space interlayer (2) communicates with the interior of the room through an air outlet (21); the other side of the heat exchange space interlayer (2) The side communicates with the outside world through the air outlet hole (22); the air outlet hole (21) and the air outlet hole (22) are arranged at different heights on the outer wall. 2. The building fresh air heat exchange system according to claim 1, characterized in that the outer wall includes an inner wall (200), an outer wall (201), and a wall connecting the inner wall (200) and the outer wall (201) Connecting bricks (202), the heat exchange space interlayer (2) is composed of an inner wall (200) and an outer wall (201), the air outlet (21) is set on the inner wall (200), and the The air exhaust hole (22) is arranged on the outer wall (201). 3. The building fresh air heat exchange system according to claim 2, characterized in that there is one air outlet hole (21), which is set at a height of 0.5-2.5 meters from the ground. 4. The building fresh air heat exchange system according to claim 2, characterized in that the number of said exhaust holes (22) is 1-2, which are set at a height of 0.3-0.6 meters from the ground. 5. The building fresh air heat exchange system according to claim 2, characterized in that the ratio of the number of the air outlet holes (21) to the air exhaust holes (22) is 1:3. 6. The building fresh air heat exchange system according to claim 2, characterized in that said exhaust hole (22) is set at a height of 3.2 meters from the ground, and the number of exhaust hole (22) is one; Its of described exhaust hole (22) is arranged on 0.3 meters above the ground, and the quantity of exhaust hole (22) is 2. 7. The building fresh air heat exchange system according to claim 2, characterized in that the size of the exhaust hole (22) is 240mm×53mm×60-100mm. 8. The building fresh air heat exchange system according to claim 2, characterized in that said air outlet hole (21) is arranged on the inner side of the outer wall, and said exhaust hole (22) is arranged on the outer side of the outer wall. 9. The building fresh air heat exchange system according to claim 1 or 2, characterized in that the air supply device (1) is a fan.

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