CN2312353Y - Ventilation fan - Google Patents

Abstract

The utility model discloses a ventilation fan used for eliminating the oil fume in the kitchen, which is composed of a machine seat, an impeller, a motor, a protective door for wind prevention, etc. The utility model is characterized in that the protective door for wind prevention is arranged on an air inlet of an airflow channel of the ventilation fan. When the ventilation fan exhausts air, the protective door for wind prevention can withdraw from the airflow channel, so that the water-oil separation, the adhesion, the resistance and the noise caused by the protective door for wind prevention are eliminated; when the ventilation fan is closed, the protective door for wind prevention can make the airflow channel of the ventilation fan, the surfaces of the impeller, the motor and other surfaces which are adhered by oil fouling completely partition off the indoor space; in addition, the protective door for wind prevention has simple and tight structure, reliable working, very convenience for manufacture, maintenance and use and low cost.

Description

Ventilation fan

The utility model relates to a kind of eliminating harmful gas, particularly gets rid of the ventilation fan of kitchen fume.

In order to get rid of the various harmful gases that production, test and when cooking produce, using ventilation fan widely.This is to improving working environment and the Kitchen hygiene condition has played great role, producing and selling at present and these ventilation fans that use, in order to prevent outdoor wind, dirt and mosquito invasion and attack, great majority all are provided with the protective door that keeps out the wind of different structure in the air outlet of its afterbody, they utilize the wind-force of exhaust airstream and the deadweight of door to open and close, and centrifugal principle and other modes utilized are also arranged.

But, these protective doors that keep out the wind that are arranged on the air-flow path air outlet have following shortcoming: 1. during exhaust, they still are among the air-flow path, and by back blast, this has caused the separation of harmful matter from waste gas, has seriously increased pollution, exhaust resistance and noise; 2. the harmful matter that is separated, a large amount of oil water mixtures of separating the oil smoke that produces during particularly from the cooking, adhere to and be trapped on the component surfaces such as air-flow path, fan head and the protective door that keeps out the wind of ventilation fan, protective door is arranged on the air outlet owing to keep out the wind, just in time these contaminated component are closed indoor when closing, worsened indoor air and hygienic conditions, made troubles to cleaning simultaneously; 3. because the viscosity of greasy dirt is big, seriously polluted, the protective door that keeps out the wind is arranged on the air outlet and all requires to leave big slit, the structure imprecision, and also malfunctioning easily.

The purpose of this utility model is that a kind of improved ventilation fan will be provided, the oil-water separation, adhesion, resistance and the noise that produce because of the protective door that keeps out the wind when it can prevent exhaust effectively can also will adhere to the air-flow path of greasy dirt and fan first-class component and isolate with the interior space closely when not exhaust.

The purpose of this utility model is achieved in that the suction port at the ventilation fan air-flow path is provided with the protective door that keeps out the wind with its flexible connection, it will recess out from flow channel is logical when opening, do not contact, thereby fundamentally eliminated in the original equipment gas-liquid separation, adhesion, resistance and noise because of barrier air produced with air-flow; Protective door is arranged on suction port owing to keep out the wind, and it is all kept outside of the door air-flow path and the first-class component of fan the suction port of complete closed air-flow path when closing, and the complete and interior space is isolated; This protective door that keeps out the wind is not contaminated, does not need to reserve the slit, so keep out the wind, protect all very tight.

Can be by manually direct this protective door that keeps out the wind of opening and closing, when the mounting point of ventilation fan was not too high, this mode was particularly convenient; Certainly, also can for example, use leverage, slide mechanism and band transmission etc. by this door of control mechanism switch.

Reduce the setting height(from bottom) of ventilation fan, make in the scope of ventilation fan 100～1000mm above the harmful gas source, be preferably between 100～300mm, very advantageous conditions has been created in operations such as it is outdoor that this can make harmful gas just be drained into effectively when not spreading as yet on the one hand, the protective door that also keeps out the wind for manually direct switch on the other hand and cleaning.

The ventilation fan that the utility model proposes has following advantage: 1. owing to the protective door that keeps out the wind has originally been recessed from air-flow path when opening, so fundamentally eliminated gas-liquid separation, adhesion, resistance and the noise that is caused by the protective door that keeps out the wind; 2. because the protective door that keeps out the wind is arranged on suction port, when it is closed the above-mentioned parts that is stained with greasy dirt in the ventilation fan is all kept outside the door, so indoor environment is not contaminated, it is also very convenient to clean, and has also created advantage for interior decoration; 3. because the protective door that keeps out the wind is not contaminated, do not need to reserve the slit, so keep out the wind, protect all very tight, and simple in structure, working stability is reliable.Therefore, the ventilation fan after this improvement integrate exhaust unobstructed, pollute less, resistance and noise is minimum, the protection tight, cost is low, easy to clean and help advantage such as interior decoration.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is according to the ventilation fan structural representation that the utility model proposes.

Fig. 2,3 and 4 is several example structure schematic representation that keep out the wind and flexibly connect between protective door and the suction port according to the ventilation fan that the utility model proposes.

As shown in Figure 1, ventilation fan of the present utility model comprises support (1), the protective door that keeps out the wind (4) and fan head (2), fan head (2) is made up of motor (5) and impeller (6), this fan head (2) is installed in the interior air-flow path of support (1), suction port (9) at ventilation fan is provided with the above-mentioned protective door that keeps out the wind (4), between it and the suction port (9) for flexibly connecting.This flexible connection can be that the hinge of rotary type connects single leaf door structure as shown in Figure 2, bivalve door structure perhaps shown in Figure 3; Also can be that portable slideway connects guide groove slide door structure as shown in Figure 4 or plug-type gate structure; Can also be suspension type, other movable connection structures such as snap-in.In above-mentioned these structures, the protective door that keeps out the wind can be recessed out from air-flow path when opening fully, and can be with the suction port sealing of ventilation fan when closing.The protective door that keeps out the wind (4) among Fig. 1 is in the position of closing.

Ventilation fan is installed on the fixture (8), opens the protective door that keeps out the wind (4) during exhaust and makes it to withdraw from air-flow path, connects the power supply of motor (5), and impeller (6) rotation is with the direction of harmful gas along arrow (3).Drain into outdoor through suction port (9), air outlet (7).

The protective door that keeps out the wind (4) of ventilation fan can be by manually directly opening and closing; Also can be by various known modes and mechanism.As opening and closing such as leverage, pulley mechanisms.

The mounting point of ventilation fan should make it just can not be excluded effectively when spreading near the harmful gas source, and this also helps operation, cleaning and the maintenance of ventilation fan.For example, ventilation fan is installed on the height of cooking stove top 100～1000mm, its optimum distance is 100～300mm.

Claims (4)

1, gets rid of harmful gas, particularly get rid of the ventilation fan that kitchen fume is used, comprise support (1), the protective door that keeps out the wind (4) and fan head (2), fan head (2) is made up of motor (5) and impeller (6), this fan head (2) is installed in the interior air-flow path of support (1), it is characterized in that being provided with the above-mentioned protective door that keeps out the wind (4) with its flexible connection at ventilation fan air-flow path suction port (9), it can recess out from air-flow path, or the suction port (9) of sealing air-flow path.

2, ventilation fan according to claim 1 is characterized in that this protective door that keeps out the wind (4) is by manually directly opening or closing.

3, ventilation fan according to claim 1.It is characterized in that this protective door that keeps out the wind (4) opens or close through a control mechanism.

4,, it is characterized in that this ventilation fan is installed in the altitude range of top, harmful gas source 100～1000mm according to any described ventilation fan of claim 1 to 3.

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