CN206676881U - The vent cabinet of compensating ventilation cabinet - Google Patents

Abstract

The utility model discloses a kind of vent cabinet of compensating ventilation cabinet, and it includes cabinet, and the front of cabinet is provided with overhead door, and the inner side of overhead door is provided with workbench.The top of cabinet is provided with exhaust outlet, and exhaust outlet communicates with the operating area in cabinet.The first intake stack of " Jiong " type is provided with cabinet, side pipe body is provided with the wind-supplying mouth being arranged side by side with exhaust outlet thereon, and its both sides body is respectively equipped with the first air inlet, and the air holes of two first air inlets is oppositely arranged and towards the operating area of cabinet.The beneficial effects of the utility model are the balance and stably for ensureing vent cabinet interior air-flow, avoid producing the disorderly phenomenon of cabinet interior air-flow, blocking harmful gas escapes.

Description

Make-up type fume hood

technical field

The utility model relates to the technical field of fume hoods, in particular to an air supply type fume hood.

Background technique

Supplementary air type fume hoods are divided into two types: supplementary air outside the cabinet and supplementary wind inside the cabinet.

The supplementary air outlet outside the cabinet is outside the operating area of the fume hood. Due to the limitation of the installation location, the air outlet can only be installed above the operation window, that is, the front and upper part of the fume hood. Disadvantages of the external air supply type fume hood are: 1. It affects the operator and causes discomfort, especially in winter and summer; 2. The energy saving effect is limited because of the mixed air flow outside the cabinet (indoor); 3. The air outlet When the air supply speed is too high, the Venturi effect will be generated, which will induce harmful substances to the work area. Due to the above disadvantages, the air supply type fume hood outside the cabinet has been gradually eliminated by the market.

At present, most of the air supply fume hoods on the market use the air supply in the cabinet. Existing air supply type fume hoods in the cabinet are usually provided with a single air outlet at the upper part of the operating area or at the bottom of the operating area. This kind of supplementary air measure has a single direction of air flow organization, and its defect is that when the air supply speed is too high, it is easy to cause the air flow in the cabinet to be disordered, thereby causing the escape of polluted air in the cabinet and exposing the operator to danger.

Utility model content

The main purpose of this utility model is to propose a kind of air supply type fume hood, the purpose of which is to ensure the balance and stability of the air flow in the fume hood, avoid the phenomenon of turbulent air flow in the fume hood, and reduce the escape of harmful gases.

In order to achieve the above object, the ventilation hood proposed by the utility model comprises a cabinet, the front of the cabinet is provided with a lift door, and the inside of the lift door is provided with a workbench. An air exhaust port is arranged above the cabinet body, and the air exhaust port communicates with the operating area in the cabinet body. There is a first air inlet pipe of "Xi" type in the cabinet, and an air supply port arranged side by side with the air outlet on the upper pipe body, and a first air inlet on both sides of the pipe body, and two first air inlets. The air holes are set opposite and face the operating area of the cabinet.

Preferably, the two first air inlets are both arranged at the ends of the pipe bodies on both sides of the first air inlet duct which are close to the workbench.

Preferably, the fume hood further includes a second air intake duct located directly below the operation window of the cabinet, and the second air intake duct is horizontally arranged at the front of the workbench. In addition, both ends of the second air inlet duct communicate with both sides of the first air inlet duct, and a second air inlet is provided on the side facing the operating area of the cabinet.

Preferably, a lifting mechanism for controlling the vertical movement of the lifting door is provided above the cabinet body.

Preferably, the lifting mechanism includes a rotating shaft and chains respectively arranged at two ends of the rotating shaft and rotatably matched with the rotating shaft. The rotating shaft is arranged on the top of the cabinet. The first ends of the two chains are connected with the lift gate, and the second ends of the two chains are connected with a counterweight.

The beneficial effects of the utility model are as follows: 1. The fresh air is directly supplemented into the fume hood without heating or cooling pretreatment, which reduces the energy consumption loss of the heated or refrigerated air in the room; An air curtain can be quickly formed at the operation window to prevent harmful gases from escaping, and at the same time ensure the balance and stability of the airflow in the cabinet and avoid airflow disturbance in the cabinet; It is best to avoid the leakage of harmful gas.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative work.

Fig. 1 is the structural representation of an embodiment of the utility model;

Fig. 2 is a structural schematic diagram of the first air inlet duct and the second air inlet duct;

Fig. 3 is a flow diagram of supplementary air flow in the first air inlet duct and the second air inlet duct.

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

The utility model provides a ventilation hood of a supplementary air type.

With reference to Fig. 1, the structural representation of an embodiment of the utility model.

As shown in Figure 1, in the embodiment of the utility model, the ventilation hood of this supplementary air type includes a cabinet body 1, an operation window is provided on the front of the cabinet body 1, and a window that can move up and down on the operation window is provided directly above the operation window. lift gate 2. The inner side of the lifting door 2 is provided with a workbench 3 , and the area above the workbench 3 is the operating area of the cabinet body 1 . When the lifting door 2 is pulled down, the size of the operating window of the cabinet body 1 can be reduced. When the lifting door 2 is pulled to the lowest point, the operating area of the cabinet body 1 can be separated from the area outside the cabinet (i.e. indoors) to avoid the inside of the operating area. Toxic gas leaks.

In this embodiment, in order to control the lifting of the lifting door 2 , a lifting mechanism 4 for controlling the lifting door 2 to move up and down is provided above the cabinet body 1 . Specifically, the lifting mechanism 4 includes a rotating shaft 41 and chains 42 respectively arranged at two ends of the rotating shaft 41 and rotatably matched with the rotating shaft 41 . The rotating shaft 41 is arranged on the top of the cabinet body 1 . The first ends of the two chains 42 are connected with the lifting door 2, and the second ends of the two chains 42 are connected with a counterweight.

In order to keep the gas in the cabinet well circulated, an air exhaust port 5 is provided above the cabinet body 1 , and the air exhaust port 5 communicates with the operating area in the cabinet body 1 . Simultaneously, in the cabinet body 1, the first air inlet pipe 6 of the "冂" type is set, and the upper side pipe body of the first air inlet pipe 6 is located at the upper part of the cabinet body 1, and the upper side pipe body is provided with an air exhaust pipe. The supplementary air outlet 61 that the mouth 5 is arranged side by side. The pipe bodies on both sides of the first air inlet duct 6 are respectively located on the left and right sides in the cabinet body 1, and the pipe bodies on both sides are respectively provided with first air inlets 62, and the air holes of the two first air inlets 62 are arranged oppositely. Towards the operating area of cabinet 1. In this embodiment, the two first air inlets 62 are both arranged at the ends of the first air inlet duct 6 near the workbench 3 . Like this, when supplying air from the two first air inlets 62 to the operation area, convection can be formed below the operation area, so that the gas in the operation area flows upwards, avoiding the turbulence of the air flow in the cabinet and causing harmful gas to escape.

Further, in order to prevent harmful gas from escaping from below the operating window, a second air inlet duct 7 arranged horizontally is provided at the front of the workbench 3 . Both ends of the second air inlet duct 7 communicate with the first air inlet duct 6 respectively, and a second air inlet 71 is provided on the side facing the operating area of the cabinet body 1 . As shown in Fig. 2, the first air inlet duct 6 and the second air inlet duct 7 form a supplementary air duct, and the supplementary air flow discharged from the second air inlet 71 makes the gas at the operating window flow to the operating area of the cabinet body 1, Prevent harmful gases from escaping from below the operating window. As shown in FIG. 3 , the supplementary airflow of the second air inlet 71 is also conducive to the formation of an air curtain by the supplementary airflow of the two first air inlets 62 to further block harmful gases from escaping.

The technical scheme of the utility model is to set the first air inlets 62 on the left and right sides inside the cabinet body 1, so that the gas in the cabinet body 1 forms a convection flow, so that the gas in the cabinet body 1 flows to the air outlet 5 above the cabinet body 1 , to avoid the turbulence of air flow in the cabinet and the escape of harmful gases. A second air inlet 71 is arranged on the front of the operation window, and the supplementary air flow through the second air inlet 71 makes the gas with an outward flow tendency in the operation window flow into the cabinet body 1 . The supplementary airflow of the two first air inlets 62 and the supplementary airflow of the second air inlet 71 are also conducive to forming an air curtain at the operating window of the cabinet body 1 to prevent harmful gases from escaping.

Compared with the prior art, the beneficial effects of the utility model are:

1. The fresh air is directly fed into the fume hood without heating or cooling pretreatment, reducing the loss of energy consumption of the heated or refrigerated air in the room;

2. The three-dimensional three-way supplementary air flow quickly forms an air curtain at the operating window to prevent harmful gases from escaping, and at the same time ensure the balance and stability of the air flow in the cabinet 1, and avoid air flow disorder in the cabinet;

3. The three air inlets are all located on the outer edge of the lower operating area. When the supplementary air system is turned on, the supplementary air flow enters the bottom of the operation area from three directions respectively, which can ensure that the harmful gas generated by the experiment is surrounded by the supplementary air flow to the maximum extent, avoiding Harmful gas leaks out.

The above are only preferred embodiments of the present utility model, and are not therefore limiting the patent scope of the present utility model. Under the inventive concept of the present utility model, the equivalent structural transformations made by utilizing the specification of the utility model and the contents of the accompanying drawings, or directly/ Indirect application in other relevant technical fields is included in the patent protection scope of the present utility model.

Claims (5)

1. A kind of fume hood of supplementing wind type, it comprises cabinet body, and the front of described cabinet body is provided with lifting door, and the inboard of described lifting door is provided with workbench; It is characterized in that, the top of described cabinet body is provided with Air exhaust port, the air exhaust port communicates with the operating area of the cabinet body; the cabinet is provided with a first air inlet duct of the "冂" type, and the upper pipe body of the first air inlet duct is provided with Air supply port, the air supply port is arranged side by side with the air exhaust port; the pipe bodies on both sides of the first air inlet pipe are respectively provided with first air inlets, and the air holes of the two first air inlets are arranged opposite to each other and facing the operating area of the cabinet. 2. The air supply type fume hood as claimed in claim 1, wherein the two first air inlets are located at one end of the pipe body on both sides of the first air inlet duct close to the workbench . 3. The air supply type fume hood as claimed in claim 1, further comprising a second air intake duct positioned directly below the operating window of the cabinet, the second air intake duct being horizontally arranged at the The front part of the workbench; the two ends of the second air inlet duct communicate with the two sides of the first air inlet duct, and a second air inlet is provided on the side facing the operating area of the cabinet. tuyere. 4. The air supply type fume hood according to any one of claims 1-3, characterized in that a lifting mechanism for controlling the up and down movement of the lifting door is provided above the cabinet body. 5. The air supply type fume hood as claimed in claim 4, wherein the elevating mechanism comprises a rotating shaft, and chains which are respectively arranged at both ends of the rotating shaft and are rotatably matched with the rotating shaft; the rotating shaft is arranged on The top of the cabinet; the first ends of the two chains are connected with the lifting door, and the second ends of the two chains are connected with a counterweight.