Fresh air system adopting pipeline air valve to adjust air volume

Abstract

The utility model relates to a fresh air system adopting a pipeline air valve to adjust air volume, which comprises a fresh air fan and a controller, each floor in a building is provided with a fresh air supply outlet, an air exhaust outlet and an air quality detection device, the fresh air fan is connected with a fresh air pipeline and an exhaust pipeline, the fresh air pipeline is connected with a fresh air distributor, and the exhaust pipeline is connected with a fresh air outlet. A plurality of fresh air branch pipelines are connected to the fresh air distributor, and fresh air pipeline valves are installed on the fresh air branch pipelines respectively. According to the utility model, factors such as space factors, personnel activity areas and the like are considered, the air volume of the fresh air system is adjusted by adopting a subarea control mode and a pipeline air valve, the corresponding equipment capacity purchase quantity can be reduced in actual use, and the energy loss is reduced.

Description

Technical Field

[0001] This utility model relates to the field of civil fresh air system technology, and in particular to a fresh air system that uses a duct valve to regulate air volume. Background Technology

[0002] In recent years, with social progress and increased awareness of living conditions, environmental protection, and the environment, various fresh air systems have been continuously updated and iterated, especially in northern regions with smog and in enclosed spaces like basements. The simplest systems involve opening windows for ventilation or installing ordinary fans to directly exhaust air outdoors or pressurize and exchange air indoors. There are also standalone fresh air units installed directly on walls or windows, as well as small-scale residential heat exchange systems. Among these, small-scale residential heat exchange systems are relatively comprehensive, offering both fresh air exchange and heat exchange during the process, preventing significant temperature loss between hot and cold air within the building. They are also aesthetically pleasing and feature relatively advanced intelligent systems, but are therefore relatively expensive.

[0003] There are basically two ways to calculate the fresh air volume of a residential fresh air system: the first is based on the number of people moving around in a fixed space, and the second is based on the floor area of ​​the building. The fresh air capacity calculated by these two methods generally differs significantly. According to regulations, large-capacity heat exchange fresh air fans need to be selected. However, large-capacity fans consume a lot of power and generate a lot of noise. If two relatively small heat exchange fresh air fans are considered, the economic cost will be high. Therefore, it is necessary to design a fresh air system that uses duct dampers to regulate the air volume, thereby reducing the cost of installing a residential fresh air system. Utility Model Content

[0004] This invention aims to address the shortcomings of existing technologies by providing a fresh air system that uses duct valves to regulate airflow.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a fresh air system using duct valves to regulate airflow, comprising: a fresh air fan, a controller, and each floor of the building is equipped with a fresh air supply outlet, an air exhaust outlet, and an air quality detection device. The fresh air fan is connected to a fresh air duct and an exhaust duct. A fresh air distributor is connected to the fresh air duct, and several fresh air branch ducts are connected to the fresh air distributor. Each fresh air branch duct is equipped with a fresh air duct valve. The ends of each fresh air branch duct are connected to the fresh air supply outlet on each floor. Each air exhaust outlet on each floor is connected to an exhaust branch duct, and all exhaust branch ducts are connected to the exhaust duct. The controller is electrically connected to the air quality detection device on each floor, all the fresh air duct valves, and the fresh air fan.

[0006] Furthermore, a humidity sensor is installed inside the building, and the humidity sensor is electrically connected to the controller.

[0007] Furthermore, the fresh air duct valve includes a valve body and a control motor, the control motor being electrically connected to the controller.

[0008] Furthermore, the controller is a visual MCU controller.

[0009] The beneficial effects of this utility model are: while considering spatial factors, this utility model also considers factors such as the area of ​​personnel activity, adopts a zoned control method, and uses duct dampers to regulate the air volume of the fresh air system, which reduces the number of fresh air fans required, thereby reducing the corresponding equipment capacity procurement and energy consumption in actual use. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a front sectional view of the fresh air duct valve.

[0012] Figure 3 This is a side view of the fresh air duct valve.

[0013] In the diagram: 1-Fresh air fan; 2-Controller; 3-Fresh air supply outlet; 4-Air exhaust outlet; 5-Air quality detection device; 6-Fresh air duct; 7-Exhaust air duct; 8-Fresh air distributor; 9-Fresh air branch duct; 10-Fresh air duct valve; 11-Exhaust air branch duct; 12-Humidity sensor; 13-Valve body; 14-Control motor;

[0014] The accompanying drawings in this utility model are all schematic diagrams and their sizes do not represent actual dimensions.

[0015] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] like Figures 1-3As shown, a fresh air system using duct valves to regulate airflow includes: a fresh air fan 1 and a controller 2. Each floor of the building is equipped with a fresh air supply outlet 3, an air exhaust outlet 4, and an air quality detection device 5. The fresh air fan 1 is connected to a fresh air duct 6 and an exhaust duct 7. The fresh air duct 6 is connected to a fresh air distributor 8, and the fresh air distributor 8 is connected to several fresh air branch ducts 9. Each fresh air branch duct 9 is equipped with a fresh air duct valve 10. The ends of each fresh air branch duct 9 are connected to the fresh air supply outlet 3 on each floor. Each air exhaust outlet 4 on each floor is connected to an exhaust branch duct 11, and each exhaust branch duct 11 is connected to the exhaust duct 7. The controller 2 is electrically connected to the air quality detection device 5 on each floor, all the fresh air duct valves 10, and the fresh air fan 1.

[0018] Specifically, each air quality monitoring device 5 detects the air quality on its respective floor within the building. The probes of each device detect the concentrations of CO2, TVOC, formaldehyde, and dust in the air. Each device sends a signal to the controller 2. The controller 2 receives the signal and makes a judgment. If the air quality is below the set standard, air exchange is required. The controller 2, following a pre-programmed sequence, automatically sends a start command to the fresh air fan 1. Upon receiving the start command, the internal control unit of the fresh air fan 1 starts the fan. After the fresh air fan 1 starts, the fresh air duct 6 generates positive pressure fresh air. Positive pressure fresh air from duct 6 is delivered to fresh air distributor 8 via the duct. When there is positive pressure airflow in fresh air distributor 8, the positive pressure airflow is automatically delivered to fresh air duct valve 10. At the same time, controller 2 controls the opening of fresh air duct valve 10 corresponding to the floor of the air quality detection device 5. Positive pressure fresh air is delivered to the corresponding space in the building via the corresponding fresh air branch duct 9 and fresh air supply outlet 3. After the positive pressure fresh air is output from the fresh air supply outlet 3, the air in the building undergoes negative pressure return through the air exhaust outlet 4, and then returns to the fresh air fan 1 through the exhaust branch duct 11 and exhaust duct 7 to exhaust the polluted air, completing the fresh air exchange. When the fresh air duct valve 10 is not fully open, the airflow of the heat exchange fresh air system is greater than the airflow required by the room. Controller 2 controls the fresh air fan 1 to reduce the airflow output, reduce unnecessary noise, provide a better experience for people in the building, and at the same time reduce power consumption.

[0019] A humidity sensor 12 is installed inside the building, and the humidity sensor 12 is electrically connected to the controller 2.

[0020] Specifically, basements are located below ground level, have poor natural ventilation, and are prone to accumulating moisture, leading to a damp environment. A humidity sensor 12 is installed in the basement to detect humidity. When the humidity exceeds a set standard value, the space dehumidification function needs to be activated. The controller 2 sends a command to the fresh air fan 1 to start and activate the dehumidification function.

[0021] The fresh air duct valve 10 includes a valve body 13 and a control motor 14, which is electrically connected to the controller 2.

[0022] Specifically, by controlling the opening and closing of the valve body 13 by controlling the motor 14, the opening and closing angle of the valve body 13 can also be controlled to achieve proportional air intake.

[0023] The controller 2 is a visual MCU controller.

[0024] Specifically, the air quality detection device 5 and humidity sensor 12 can be viewed on the MCU controller display panel, showing the regional air quality values. Operators can manually operate the fresh air fan 1 and fresh air duct valve 10 on the control panel.

[0025] The principle of this utility model is as follows: According to regulations, there are basically two ways to determine the air volume of a civil fresh air system. The following analysis is based on a case study: Figure 1 The building shown has a floor area of ​​S = 200㎡, a height of H = 2.8m, two floors above ground and one floor below ground. The actual usable floor area is 150㎡, averaging 50㎡ per floor. There are 5 people living in the space. Each person in the family residence should have a minimum fresh air volume of 30m³ / h. The capacity of the heat exchange fresh air unit is calculated using two methods: the first is based on the number of people moving within the fixed space: Q1 = 5 * 30 = 150m³ / h; the second is based on the floor area: Q2 = 1 * 150 * 2.8 = 420m³ / h. The fresh air capacity calculated using these two methods differs significantly. Regulations require a large-capacity heat exchange fresh air unit, which has higher capacity, higher power consumption, and higher noise levels. This utility model takes into account the number of people active in a fixed space within a civil building and the area of ​​the building. After using a fixed program to judge the logic, it automatically controls the air quality in the building by zone control. According to the national standard conversion factor of 0.5-0.8 m³ / h air exchange, 0.5*420=210 m³ / h, 0.8*420=336 m³ / h. Excluding the attenuation of air volume in the duct, the purchased equipment with a capacity of 350 m³ / h heat exchange fresh air is sufficient for the civil fresh air use of this building.

[0026] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A fresh air system that uses a duct damper to regulate the air volume, characterized in that, include: A fresh air fan (1) and a controller (2) are provided. Each floor of the building is equipped with a fresh air supply outlet (3), an air exhaust outlet (4), and an air quality detection device (5). The fresh air fan (1) is connected to a fresh air duct (6) and an exhaust duct (7). The fresh air duct (6) is connected to a fresh air distributor (8). The fresh air distributor (8) is connected to several fresh air branch ducts (9). Each fresh air branch duct (9) is equipped with a fresh air duct valve (10). The end of each fresh air branch duct (9) is connected to the fresh air supply outlet (3) of each floor. Each air exhaust outlet (4) of each floor is connected to an exhaust branch duct (11). Each exhaust branch duct (11) is connected to the exhaust duct (7). The controller (2) is electrically connected to the air quality detection device (5) of each floor, all the fresh air duct valves (10), and the fresh air fan (1).

2. The fresh air system of claim 1, wherein, A humidity sensor (12) is installed inside the building and is electrically connected to the controller (2).

3. The fresh air system of claim 1, wherein the air duct damper is a butterfly damper. The fresh air duct valve (10) includes a valve body (13) and a control motor (14), which is electrically connected to the controller (2).

4. The fresh air system of claim 2, wherein, The controller (2) is a visual MCU controller.

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