Flame retardant hydraulic oil experimental ventilation device

Abstract

The utility model provides a kind of flame retardant hydraulic oil experiment ventilation device, it is characterized by, including: main air conditioner, variable air supply device, differential pressure sensor, laboratory fan, power supply, variable exhaust device, air outlet, variable air volume ventilation controller;Variable air volume ventilation controller is electrically connected with differential pressure sensor, laboratory fan and power supply;The variable air supply device is connected with variable air volume ventilation controller;The variable exhaust device is connected with variable air volume ventilation controller;The main air conditioner is connected with variable air supply device, and the variable air supply device has multiple air supply sub-pipeline;The air outlet is connected with variable exhaust device, and variable exhaust device has multiple air exhaust sub-pipeline simultaneously.The utility model's flame retardant hydraulic oil experiment ventilation device can independently adjust the ventilation of each laboratory, and has comprehensive cost advantage.

Description

Technical Field

[0001] This utility model relates to a flame-retardant hydraulic oil experimental ventilation device, belonging to the field of ventilation. Background Technology

[0002] The selection of a ventilation system for flame-retardant hydraulic oil testing directly affects the safety and effectiveness of the experiment. Based on the characteristics of flame-retardant hydraulic oil testing, the following ventilation methods are commonly used:

[0003] (1) Direct exhaust ventilation: An exhaust fan is installed above the experimental equipment to directly exhaust the polluted air generated during the experiment to the outside. This method is only suitable for simple tests of gases with low volatility, non-toxicity or corrosiveness, and cannot meet the requirements for handling harmful gases that may be generated during high-temperature testing of flame-retardant hydraulic oil.

[0004] (2) Traditional single-unit exhaust system: High-flow-rate, high-pressure exhaust fans are installed at the top of multi-story, vertically arranged laboratories to extract polluted air from each room, treat it, and then discharge it into the atmosphere. The advantages of this method are its simplicity, low investment, and ease of construction. However, its disadvantages are uneven air extraction and high noise levels. Currently, most laboratories use this method.

[0005] (3) Two-stage exhaust system: This method consists of a primary main fan and multiple secondary distribution fans. The main fan creates a certain negative pressure in the system, and the exhaust volume of each distribution fan is determined by the exhaust volume of the distribution fans, ensuring uniform and required exhaust, and preventing excessive or insufficient airflow at each outlet. This process overcomes the main drawbacks of traditional single-unit exhaust systems, enabling laboratories on different floors and those on the same floor with vertical and horizontal layouts to meet design requirements, resulting in good exhaust performance. However, the investment is slightly higher than that of traditional exhaust systems.

[0006] Currently, flame-retardant hydraulic oil laboratories are key testing sites for many crude oil extraction companies. Laboratory safety, especially the emission of flammable gases, toxic volatiles, and high-temperature decomposition products, has become a major concern for managers and users. Therefore, an automated ventilation system for flame-retardant hydraulic oil laboratories is crucial. Existing ventilation systems primarily rely on multiple fans operating at timed intervals, resulting in excessive power consumption and a lack of closed-loop control, negatively impacting laboratory comfort and safety.

[0007] With the continuous development of science and technology, the overall scale and number of various laboratories are constantly expanding, becoming increasingly comprehensive and large-scale. The ventilation control system of a laboratory differs from the design requirements of general household ventilation. Its main purpose is to provide a safe and stable experimental environment, reduce the possibility of laboratory personnel working in hazardous gases, ensure the safety of the laboratory and its personnel, and ensure that experiments are conducted safely and orderly. Utility Model Content

[0008] The purpose of this invention is to provide a flame-retardant hydraulic oil experimental ventilation device to solve the above-mentioned problems.

[0009] The present invention adopts the following technical solution:

[0010] A flame-retardant hydraulic oil experimental ventilation device, characterized in that it comprises: a main air conditioner, a variable air supply device, a differential pressure sensor, a laboratory fan, a power supply, a variable exhaust device, an exhaust outlet, and a variable air volume (VAV) ventilation controller; the VAV ventilation controller is electrically connected to the differential pressure sensor, the laboratory fan, and the power supply; the variable air supply device is connected to the VAV ventilation controller; the variable exhaust device is connected to the VAV ventilation controller; the main air conditioner is connected to the variable air supply device, which has multiple air supply sub-ducts; the exhaust outlet is connected to the variable exhaust device, which also has multiple exhaust sub-ducts.

[0011] Furthermore, the flame-retardant hydraulic oil experimental ventilation device of this utility model also has the following feature: the variable air supply device has an air valve or a venturi valve, and its air volume adjustment range is 0-100%.

[0012] Furthermore, the flame-retardant hydraulic oil experimental ventilation device of this utility model also has the following feature: it also has an airflow sensor to detect the stability of the airflow inside the laboratory.

[0013] Furthermore, the flame-retardant hydraulic oil experimental ventilation device of this utility model also has the following feature: it also has a temperature sensor, which is electrically connected to the variable air volume ventilation controller.

[0014] Furthermore, the flame-retardant hydraulic oil experimental ventilation device of this utility model also has the following feature: the variable air volume ventilation controller also has an interface for electrical connection with external building control devices.

[0015] Furthermore, the flame-retardant hydraulic oil experimental ventilation device of this utility model also has the following feature: at least one air supply sub-duct has an opening corresponding to a laboratory.

[0016] Furthermore, the flame-retardant hydraulic oil experimental ventilation device of this utility model also has the following features: the exhaust passage includes: interconnected laboratory fans, multiple exhaust sub-pipes, variable exhaust device and exhaust port.

[0017] Furthermore, the flame-retardant hydraulic oil experimental ventilation device of this utility model also has the following features: the air supply passage includes: a main air conditioner, a variable air supply device, and multiple air supply sub-ducts.

[0018] Furthermore, the flame-retardant hydraulic oil experimental ventilation device of this utility model also has the following feature: wherein the sensing end of the differential pressure sensor is respectively set inside and outside the laboratory and in an adjacent room.

[0019] Furthermore, the flame-retardant hydraulic oil experimental ventilation device of this utility model also has the following feature: in which, in the multiple air supply sub-pipes, each pipe is individually equipped with a Venturi valve.

[0020] Beneficial effects of utility model

[0021] This invention features a variable air supply device and a variable air exhaust device, which automatically supply and exhaust air according to the conditions of each laboratory. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the flame-retardant hydraulic oil experimental ventilation device of this utility model. Detailed Implementation

[0023] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0024] like Figure 1 As shown, the flame-retardant hydraulic oil experimental ventilation device includes: a main air conditioner 14, a variable air supply device 3, a differential pressure sensor 6, a laboratory fan 7, a power supply 8, a variable exhaust device 9, an exhaust port 10, and a variable air volume ventilation controller 1.

[0025] The exhaust passage includes: interconnected laboratory fans 7, multiple exhaust sub-ducts, variable exhaust device 9, and exhaust outlet 10.

[0026] The air supply path includes: main air conditioning unit 14, variable air supply device 3, and multiple air supply sub-ducts.

[0027] Each laboratory has at least one air supply duct opening. Similarly, each laboratory also has at least one exhaust fan 7 and an exhaust duct connected to it.

[0028] The variable air supply device 3 has an air valve or venturi valve, and its air volume adjustment range is 0-100%. The adjustment response time is less than or equal to 1 second, that is, the air volume can be quickly adjusted from 0 to 100% within 1 second.

[0029] In the multiple air supply sub-ducts, each duct is equipped with a separate Venturi valve.

[0030] The working principle of a Venturi valve is based on the Venturi effect. When fluid passes through a contraction section, the flow velocity increases and the pressure decreases. A pressure difference is formed through the gap between the conical valve core and the valve body, which automatically balances the static pressure fluctuations in the pipeline and maintains a constant air volume within the range of 150 to 750 Pa.

[0031] In some other implementations, a damper, or variable air volume butterfly valve, is used instead of a venturi valve.

[0032] The working principle of a variable air volume butterfly valve is: by adjusting the blade opening through an electric actuator to change the flow area, the air volume is indirectly controlled.

[0033] The variable air volume ventilation controller 1 is electrically connected to the differential pressure sensor 6, the laboratory fan 7, and the power supply 8.

[0034] The differential pressure sensor 6 has its sensing ends located inside and outside the flame-retardant hydraulic oil laboratory 12, as well as in adjacent rooms. This ensures a pressure difference between the laboratory's interior and exterior, and between adjacent rooms, thereby venting harmful gases outward and preventing them from escaping into other spaces within the building.

[0035] Differential pressure sensor 6: The high-pressure end and low-pressure end of differential pressure sensor 6 are installed in the flame-retardant hydraulic oil laboratory 12 and the corridor, respectively, to ensure that the flame-retardant hydraulic oil laboratory 12 is always maintained at a negative pressure of -5 to -15 Pa, so as to prevent the gas in the flame-retardant hydraulic oil laboratory from escaping to the outside. Differential pressure sensor 6 is linked to the exhaust system to control the pressure fluctuation in the room within ±5 Pa.

[0036] Both the variable air supply device 3 and the variable exhaust device 9 are connected to the variable air volume ventilation controller 1. In some embodiments, the variable air volume ventilation controller 1 is a microcontroller that receives the values ​​of the differential pressure sensors 6 in each flame-retardant hydraulic oil laboratory 12 and adjusts the air supply and exhaust volume according to the preset pressure difference between each flame-retardant hydraulic oil laboratory 12 and between the laboratory and the external corridor.

[0037] In some embodiments, an airflow sensor 4 is also included to detect the stability of the airflow inside the flame-retardant hydraulic oil laboratory 12. The airflow sensor 4 is positioned in a location within the flame-retardant hydraulic oil laboratory 12 where airflow stability needs to be maintained, such as at an opening in the control panel. The airflow sensor 4 is electrically connected to the variable air volume (VAV) ventilation controller 1, transmitting airflow values ​​to the VAV ventilation controller 1.

[0038] In some implementations, a temperature sensor 5 is included, which is electrically connected to the variable air volume ventilation controller 1.

[0039] The effects of temperature on ventilation are as follows:

[0040] Low temperature environment: Air density increases, and the actual air exchange quality increases under the same air volume, but the energy consumption of the fan increases because power is proportional to density.

[0041] High-temperature environment: Air density decreases. If the fan is not frequency-adjusted, the actual air volume is reduced, requiring increased speed compensation, which leads to increased noise and energy consumption.

[0042] Variable air supply device 3 automatically adjusts the fan speed based on temperature changes and pressure difference:

[0043] Increase the air supply pressure to compensate for heat loss and maintain positive pressure during high temperatures;

[0044] Reduce engine speed at low temperatures to avoid excessive pressure build-up.

[0045] The variable air volume (VAV) ventilation controller 1 also has an interface for electrical connection with external building control devices 13. This allows it to connect to the entire building's control system without the need for separate gateways or other equipment, saving costs.

[0046] The variable air supply device 3 and the variable air exhaust device 9 form a closed-loop control with the variable air volume ventilation controller 1 in sequence.

[0047] Airflow sensor 4 detects the airflow inside the flame-retardant hydraulic oil laboratory 12 with an accuracy within ±5% of the actual value, and repeatability is controlled within ±0.15% of the airflow range at each airflow terminal.

[0048] Its working principle is as follows: When external air enters the main air conditioner 14, when the pressure difference and temperature inside the flame-retardant hydraulic oil laboratory are lower or higher than the set value, the variable air volume ventilation controller 1 detects the signals from the pressure and temperature sensors 5 and performs calculations. Then, the control parameters are directly sent to the variable air supply or exhaust system. The airflow sensor 4 monitors the internal conditions of the laboratory in real time and feeds back to the variable air supply or exhaust system to further control the air volume entering and leaving the laboratory, thereby achieving closed-loop control.

[0049] The laboratory ventilation control system can automatically detect the internal temperature and air pressure difference of the laboratory, provide real-time feedback, and make rapid adjustments to meet the needs of laboratory safety and comfort.

[0050] The ventilation system for flame-retardant hydraulic oil experiments requires monitoring and calculation via a controller to ensure pressure differential between the laboratory interior and the exterior or adjacent rooms. It also needs to monitor airflow stability within the laboratory to guarantee normal operation. The ventilation control system for the oil analysis laboratory is seamlessly integrated into the overall building control system, reducing costs and energy consumption.

Claims

1. A flame-retardant hydraulic oil experimental ventilation device, characterized in that, include: Main air conditioning unit, variable air supply device, differential pressure sensor, laboratory fan, power supply, variable exhaust device, exhaust outlet, variable air volume ventilation controller; The variable air volume ventilation controller is electrically connected to the differential pressure sensor, laboratory fan, and power supply. The airflow sensor is placed in a location in the flame-retardant hydraulic oil laboratory where airflow needs to be kept stable. The airflow sensor is electrically connected to the variable air volume ventilation controller and transmits the airflow value to the variable air volume ventilation controller. The variable air supply device is connected to the variable air volume ventilation controller; The variable exhaust device is connected to the variable air volume ventilation controller; The main air conditioner is connected to a variable air supply device, which has multiple air supply sub-ducts; The exhaust vent is connected to a variable exhaust device, which has multiple exhaust sub-ducts.

2. The flame-retardant hydraulic oil experimental ventilation device as described in claim 1, characterized in that: The variable air supply device has an air valve or a venturi valve, and its air volume adjustment range is 0-100%.

3. The flame-retardant hydraulic oil experimental ventilation device as described in claim 1, characterized in that: It also has a temperature sensor, which is electrically connected to the variable air volume ventilation controller.

4. The flame-retardant hydraulic oil experimental ventilation device according to claim 1, characterized in that: The variable air volume ventilation controller also has an interface for electrical connection with external building control devices.

5. The flame-retardant hydraulic oil experimental ventilation device according to claim 1, characterized in that: At least one air supply duct has an opening in a laboratory.

6. The flame-retardant hydraulic oil experimental ventilation device according to claim 1, characterized in that: The exhaust ventilation system includes: interconnected laboratory fans, multiple exhaust sub-ducts, variable exhaust devices, and exhaust outlets.

7. The flame-retardant hydraulic oil experimental ventilation device according to claim 1, characterized in that: The air supply path includes: the main air conditioning unit, the variable air supply device, and multiple air supply sub-ducts.

8. The flame-retardant hydraulic oil experimental ventilation device according to claim 1, characterized in that: in, The sensing terminals of the differential pressure sensors are respectively located inside and outside the laboratory and in adjacent rooms.

9. The flame-retardant hydraulic oil experimental ventilation device according to claim 1, characterized in that: in, In each of the aforementioned air supply sub-ducts, a separate Venturi valve is installed.

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