CN218359298U - Fume chamber cooling system - Google Patents

Abstract

The application relates to a fume hood cooling system which comprises a fume hood and a cooling device, wherein a cavity and a vent arranged at the top of the cavity are arranged in the fume hood; the cooling device comprises a spraying unit and a heat exchange unit, the heat exchange unit comprises a guide plate arranged on the lower side of the vent in an inclined mode and an inner lining plate supporting the guide plate, the inner lining plate and the guide plate divide the cavity into an operation area and a cooling area, the spraying unit comprises a liquid supply assembly and a spraying opening, the liquid supply assembly and the spraying opening are arranged in the cooling area, and the spraying opening is located on the lower side of the vent and communicated with the liquid supply assembly. The cooling liquid is sprayed on the guide plate on the lower side of the ventilation opening through the spray header, then flows downwards along the guide plate and the inner lining plate, the guide plate and the inner lining plate which are used for separating the cavity are subjected to heat absorption and cooling, and the cooling liquid is recycled through the liquid supply assembly so as to reduce the overall temperature of the ventilation cabinet and recycle resources.

Description

Fume chamber cooling system

Technical Field

The application relates to the technical field of laboratory equipment, in particular to a cooling system of a fume hood.

Background

With the development of laboratory equipment, the requirements of various laboratories on high temperature and ventilation are met simultaneously. And current high temperature experimental facilities, heating equipment such as muffle furnace, electromagnetism stove are great to surrounding heat radiation, lead to the fume chamber temperature to rise, and then produce certain danger to the laboratory.

However, the current laboratory fume hood has no special cooling system, and the danger can be reduced only by indoor air conditioning or placing the fume hood in a corner of a laboratory.

SUMMERY OF THE UTILITY MODEL

Therefore, a cooling system for a fume hood is needed to solve the problem that the fume hood does not have the function of cooling temperature.

A fume hood cooling system comprising: the cooling device comprises a fume hood and a cooling device, wherein a cavity and a vent are arranged in the fume hood, the vent is arranged at the top of the cavity, and the vent is used for extracting air in the cavity; the cooling device comprises a spraying unit and a heat exchange unit, the heat exchange unit comprises a guide plate and an inner lining plate, the guide plate is obliquely arranged on the lower side of the ventilation opening, the inner lining plate is fixedly connected with the bottom of the cavity and the bottom side of the guide plate, the inner lining plate and the guide plate divide the cavity into an operation area and a cooling area, the inner lining plate is provided with ventilation holes, the spraying unit comprises a liquid supply assembly and a spraying opening, the spraying opening is arranged in the cooling area, and the spraying opening is positioned on the lower side of the ventilation opening and communicated with the liquid supply assembly.

According to the technical scheme, the cavity is divided into the operation area and the cooling area through the guide plate and the lining plate, and after the heating device arranged in the operation area heats the ambient air, the ambient air is sucked into the cooling area through the ventilation holes to be cooled. Be provided with the shower head in the cooling district, the cooling liquid that sprays in the shower head sprays on the guide plate of vent downside under initial speed and the upward pressure and the self action of gravity that the fan provided that receive the liquid supply subassembly, then flows downwards along guide plate and interior welt, carries out the heat absorption cooling to guide plate and interior welt to realize the effect of cooling fume chamber bulk temperature.

In one embodiment, the liquid supply assembly comprises a liquid pump and a liquid outlet pipeline, one end of the liquid outlet pipeline is communicated with the spraying port, the other end of the liquid outlet pipeline is communicated with the liquid pump, and the liquid pump is used for driving liquid to flow from the liquid inlet pipeline to the liquid outlet pipeline.

Above-mentioned technical scheme, through the setting of liquid pump and drain pipe, can realize that cooling liquid obtains the initial to from the liquid pump

In one embodiment, the liquid supply assembly further comprises a liquid inlet pipeline and a flow collecting plate, the flow collecting plate is arranged at the bottom of the cooling area, one end of the liquid inlet pipeline penetrates through the flow collecting plate, and the other end of the liquid inlet pipeline is communicated with the liquid pump.

According to the technical scheme, the flow collecting plate is arranged at the bottom of the cooling area, cooling liquid flowing from the flow guide plate and the inner lining plate can be collected, and the cooling liquid is conveyed to the liquid pump through the liquid inlet pipeline, so that internal circulation of the cooling liquid is realized.

In one embodiment, the collecting plate is provided with a slope, and the liquid inlet pipeline is arranged at the bottom end of the slope in a penetrating mode.

Above-mentioned technical scheme is provided with the inclined plane on the collector plate, and cooling liquid passes through the inclined plane and collects the inclined plane bottom under the action of gravity, sets up into the liquid pipeline on the bottom to promote the collector plate and collect the effect of cooling liquid.

In one embodiment, the heat exchange unit further comprises a condensation plate disposed between the vent and the flow guide plate.

Above-mentioned technical scheme through set up the condensation plate at the vent downside, when vent department wind speed was too big, the condensation plate can prevent cooling liquid further to rise into in the vent, avoids cooling liquid's loss and cooling liquid to damage the fan. Simultaneously, the condensing plate sets up in the guide plate upside, and cooling liquid on the condensing plate assembles into the liquid drop after being blockked and drops to the guide plate on, can improve the cooling effect of guide plate.

In one embodiment, the condensation plate is provided with a diversion trench, and the diversion trench is opened towards one end of the diversion plate close to the operation area.

Above-mentioned technical scheme is through setting up the guiding gutter on the condensing plate to and make the guiding gutter opening be close to the one end in operation area towards the guide plate, make the liquid drop on the condensing plate drip to higher one side on the guide plate that the slope set up, thereby improve the heat transfer area of cooling liquid and guide plate, promote the cooling effect.

In one embodiment, the lining plate is provided with an access hole, the access hole is provided with an access door, and the height of the access hole is higher than the liquid level of the cooling liquid in the cooling area.

Above-mentioned technical scheme, through setting up access hole and access door, the experimenter can regularly supply the cooling liquid in the operation district, prevents that the cooling ability that cooling liquid leads to after running off because of volatilizing and bleeding from descending.

In one embodiment, a shielding cover is further arranged on one side of the inner lining plate close to the cooling area, and the shielding cover is arranged on the upper side of the air holes.

Above-mentioned technical scheme sets up the cover that shelters from through setting up on the bleeder vent upside, can be when guaranteeing that gas flows in bleeder vent, when avoiding the cooling liquid in cooling zone to drip downwards from interior welt, thereby flow out to the operating area pollution operating area in the bleeder vent.

In one embodiment, the shielding cover comprises an annular plate, and one end of the annular plate is attached to the outline of the upper side of the air vent.

Above-mentioned technical scheme sets up the annular plate for laminating in the bleeder vent upside through will sheltering from the cover, can enough guarantee that the cooling liquid drop does not flow out from the bleeder vent and pollutes the operation area, also can guarantee that cooling liquid drop and interior bushing plate have sufficient heat transfer area, guarantee the cooling effect.

In one embodiment, the spraying port is provided with a plurality of through holes, and the through holes are used for atomizing and spraying liquid.

Above-mentioned technical scheme, through set up the through-hole on spraying the mouth, the liquid drop through the through-hole is diffused in the operation area by atomizing to a certain extent under water pump pressure, thereby is taken away the drippage on keeping away from the guide plate that sprays the mouth by the air current in the vent more easily for the guide plate also can be covered by cooling liquid apart from the one end that sprays the mouth, thereby has optimized the distribution of cooling liquid on the guide plate, has increased heat transfer area, promotes cooling efficiency.

To sum up, the fume chamber cooling system that this application provided has following beneficial technological effect at least:

1. the cavity is divided into an operation area and a cooling area by the guide plate and the lining plate, and after the ambient air is heated by a heating device arranged in the operation area, the ambient air is sucked into the cooling area through the ventilation holes to be cooled. Be provided with the shower head in the cooling district, the cooling liquid that sprays in the shower head sprays on the guide plate of vent downside under initial speed and the upward pressure and the self action of gravity that the fan provided that receive the liquid supply subassembly, then flows downwards along guide plate and interior welt, carries out the heat absorption cooling to guide plate and interior welt to realize the effect of cooling fume chamber bulk temperature.

2. The flow collecting plate is arranged at the bottom of the cooling area, so that cooling liquid flowing from the flow guide plate and the inner lining plate can be collected, and the cooling liquid is conveyed to the liquid pump through the liquid inlet pipeline, and the internal circulation of the cooling liquid is realized.

3. Through set up the cover that shields at the bleeder vent upside, can avoid the cooling liquid of cooling zone to flow to the operating area pollution operating area from the bleeder vent when downwards dripping from interior bushing plate when guaranteeing that gas flows in bleeder vent.

Drawings

Fig. 1 is a schematic structural view of a first view of a cooling system of a fume hood in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a second view of a cooling system of a fume hood in an embodiment of the present application.

Description of reference numerals:

100. a spraying unit; 200. a heat exchange unit; 300. a vent; 110. a spray port; 120. liquid outlet pipe arrangement; 130. a liquid pump; 140. a liquid inlet pipeline; 150. a collector plate; 210. a baffle; 220. an inner liner plate; 221. air holes are formed; 222. a shield cover; 223. an access hole; 230. a condensing plate;

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a first view angle of a cooling system of a fume hood in an embodiment of the present application, and fig. 1 is a schematic structural diagram of a second view angle of the cooling system of the fume hood in the embodiment of the present application. An embodiment of the application provides a fume hood cooling system, including fume hood and heat sink. Be provided with the cavity in the fume chamber and be used for testing, the bottom of cavity is used for placing experimental facilities, and the top that the bottom was kept away from to the cavity is provided with vent 300 for the extraction air ventilates. The cooling device comprises a spraying unit 100 and a heat exchange unit 200. The heat exchange unit 200 includes a flow guide plate 210 and an inner lining plate 220, the flow guide plate 210 and the inner lining plate 220 divide the chamber into a cooling region and an operation region, the experimental apparatus for high-temperature heating is placed in the operation region, and air in the operation region flows through ventilation holes formed in the inner lining plate 220 and is pumped into the ventilation opening 300 for ventilation and heat exchange. The spraying unit 100 is arranged in the cooling area and used for cooling the whole fume hood. The spraying unit 100 comprises a spraying port 110 and a liquid supply component, the liquid supply component is communicated with the spraying port 110 and provides cooling liquid, the cooling liquid is sprayed to the heat conducting plate and the inner lining plate 220 for heat exchange and cooling through the spraying port 110 and under the influence of the air pressure at the vent 300, and accordingly the whole ventilation and cooling of the fume hood are realized.

The baffle plate 210 is disposed at a lower side of the vent 300, and is used for isolating the vent 300 from the high temperature heating apparatus. Specifically, the baffle 210 is disposed obliquely, and the height of the end of the baffle 210 connected to the inner lining plate 220 is lower than that of the other end, so that the cooling liquid on the baffle 210 flows toward the end connected to the inner lining plate 220 under the action of gravity. Specifically, in this embodiment, the inclination angle of the baffle 210 is set to 30 degrees to provide a suitable flow speed of the cooling liquid, so as to prevent the problems of insufficient heat exchange caused by too short residence time of the cooling liquid on the baffle 210 and reduced heat exchange efficiency caused by too long residence time of the cooling liquid on the baffle 210.

It should be noted that, a person skilled in the art can change the inclination angle of the baffle 210 according to the type of the cooling liquid, and when cooling liquids with different viscosities are used, the person skilled in the art can increase or decrease the inclination angle of the baffle 210 according to the actual situation, so as to maintain the appropriate flow speed of the cooling liquid on the baffle 210.

The air deflector 210 is made of heat conducting material, the hot air in the operation area flows upwards and is accumulated on the side of the air deflector 210 far away from the vent 300, and cooling liquid is sprayed on the side of the air deflector 210 near the vent 300, so that the air deflector 210 becomes an important medium for heat exchange between the operation area and the cooling area. Set up guide plate 210 to the higher heat conduction material of coefficient of heat conductivity and can promote the holistic cooling effect of fume chamber cooling system to the fume chamber effectively on this basis. Preferably, the baffle 210 is made of a metal material to ensure that the heat conducting plate has sufficient rigidity to receive the cooling liquid without deformation.

Further, the surface of the heat-conducting plate is set to be wavy so as to improve the heat exchange area between the heat-conducting plate and cooling liquid or hot air, thereby improving the heat exchange quantity between the heat-conducting plate and the outside, and further improving the overall cooling effect of the cooling system of the fume hood on the fume hood.

It should be noted that the surface shape of the heat conductive plate is not limited to the wave shape, and those skilled in the art can set the surface shape to a heat conductive plate shape common in the art such as a fin type or a wound sheet type.

The condensing plate 230 is further arranged between the heat conducting plate and the vent 300, and the condensing plate 230 is used for preventing fine cooling liquid from being pumped away by the vent 300, so that the internal structure of the fan is prevented from being corroded by water vapor of the cooling liquid, and meanwhile, the cooling liquid can be reduced to be drained away from the vent 300. Specifically, a diversion trench is further disposed on a side of the condensation plate 230 close to the ventilation opening 300, and an opening of the diversion trench faces to an end of the diversion plate 210 close to the operation area. After the cooling liquid is sucked into the air vent 300, part of the cooling liquid is further cooled in the air duct and is gathered into larger liquid drops, so that the liquid drops fall onto the condensation plate 230 along the inner wall of the air vent 300 or directly from the air duct, the liquid drops accumulated on the condensation plate 230 fall onto one end, close to the operation area, of the guide plate 210 along the guide groove, and therefore part of the condensate is recycled and flows onto the guide plate 210 again for heat exchange.

The inner lining plate 220 is disposed on a side of the air guide plate 210 away from the vent 300, and the inner lining plate 220 is connected to a side of the air guide plate 210 away from the vent 300, for supporting the air guide plate 210 and isolating the operation area and the cooling area. Specifically, in this embodiment, when the cooling liquid droplets on the flow guiding plate 210 flow to the junction between the inner lining plate 220 and the flow guiding plate 210, the cooling liquid has undergone sufficient heat exchange on the flow guiding plate 210, the temperature difference with the air in the operation area is reduced, the cooling effect is weakened, the heat exchange area of the inner lining plate 220 is increased, and the improvement of the cooling effect is not good, and meanwhile, because the inner lining plate 220 supports the flow guiding plate 210 and needs to have sufficient structural stability, the inner lining plate 220 is constructed to be vertically disposed.

The inner lining plate 220 is provided with a plurality of air holes 221 to realize the air circulation of the operation area and the cooling area. Specifically, the shielding cover 222 is disposed on one side of the air vent 221 facing the cooling area, and the shielding cover 222 is used for preventing cooling liquid from entering the air vent 221 when flowing downward from the inner lining plate 220 and then flowing into the operation area to interfere with the normal operation of the high-temperature heating device. In an embodiment, the shielding cover 222 includes an annular plate disposed on the upper side of the vent hole 221 and attached to the contour of the upper side of the vent hole 221 to prevent cooling liquid from flowing into the vent hole 221 from a gap between the vent hole 221 and the shielding cover 222.

The inner lining plate 220 is further provided with an access port 223, and the access port 223 is used for supplementing cooling liquid into the cooling zone. Specifically, the height of the access opening 223 is higher than the liquid level of the cooling liquid in the cooling zone to prevent the cooling liquid from flowing out of the access opening 223. A valve is provided on the access opening 223 to prevent the cooling liquid from leaking out of the access opening 223.

The spraying opening 110 is disposed at a side of the cooling region close to the ventilation opening 300, and is used for spraying cooling liquid onto the flow guide plate 210. Specifically, be provided with a plurality of through-holes on the mouth 110 that sprays, the through-hole is used for extrudeing cooling liquid to vaporific water droplet to make cooling liquid can cover whole guide plate 210, increase guide plate 210's effective heat transfer area, promote fume chamber cooling system's cooling effect. In the present embodiment in particular, the aperture of the through-hole is set to be between 0.01 and 0.1mm to achieve the water droplet atomizing effect.

The liquid supply assembly comprises a liquid pump 130 and a liquid outlet pipeline, the liquid pump 130 is communicated with the spray opening 110 through the liquid outlet pipeline, and the liquid pump 130 is used for pumping the cooling liquid pump 130 into the spray opening 110. Specifically, the liquid outlet pipe is arranged in the cooling area, and the liquid pump 130 is arranged in the cabinet body on the lower side of the fume hood so as to reduce the occupied volume of the liquid supply assembly in the cavity. Specifically to in this embodiment, still be provided with the liquid pump 130 control switch of being connected with liquid pump 130 electricity on the control cabinet of fume chamber, can control opening and close of liquid pump 130 through liquid pump 130 control switch to the realization control is to the operation of cooling of fume chamber.

The liquid supply assembly further comprises a liquid inlet pipe 140 and a flow collecting plate 150, wherein the flow collecting plate 150 is arranged on one side of the cooling area far away from the ventilation opening 300 so as to collect cooling liquid flowing down from the flow guide plate 210. One end of the liquid inlet pipeline 140 penetrates through the flow collecting plate 150, and the other end of the liquid inlet pipeline 140 is communicated with a liquid inlet of the liquid pump 130, so that the cooling liquid realizes internal circulation in a cooling area according to the flow sequence of the liquid pump 130, the liquid outlet pipeline, the spraying port 110, the condensing plate 230, the guide plate 210, the inner lining plate 220, the flow collecting plate 150, the liquid inlet pipeline 140 and the liquid pump 130, and the resource utilization efficiency of the cooling liquid is improved while the cooling effect of the fume hood is ensured.

Specifically, the collecting plate 150 is provided with an inclined surface and forms a groove, and the cooling liquid on the collecting plate 150 is converged to the bottom of the groove under the action of gravity. One end of the liquid inlet pipe 140 is disposed at the bottom of the groove, so as to improve the effect of collecting the cooling liquid by the collector plate 150.

The application principle of the fume chamber cooling system of this application does: the cavity is divided into an operation area and a cooling area by the guide plate 210 and the lining plate 220, and after the surrounding air is heated by a heating device arranged in the operation area, the ambient air is sucked into the cooling area through the ventilation holes to be cooled. The cooling area is provided with a spray header, cooling liquid sprayed in the spray header is sprayed on the guide plate 210 on the lower side of the vent 300 under the action of initial speed provided by the liquid supply assembly, upward pressure provided by the fan and self gravity, and then flows downwards along the guide plate 210 and the inner lining plate 220 to absorb heat and cool the guide plate 210 and the inner lining plate 220, so that the effect of cooling the whole temperature of the ventilation cabinet is realized. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "level," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or obliquely above the second feature, or may simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "beneath" a second feature may be directly or obliquely under the first feature or may simply mean that the first feature is at a lesser level than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "up," "down," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A fume hood temperature reduction system, comprising: the air conditioner comprises a fume hood, wherein a cavity and a vent (300) are arranged in the fume hood, the vent (300) is arranged at the top of the cavity, and the vent (300) is used for extracting air in the cavity; and

the cooling device comprises a spraying unit (100) and a heat exchange unit (200), wherein the heat exchange unit (200) comprises a guide plate (210) and an inner lining plate (220), the guide plate (210) is obliquely arranged on the lower side of a ventilation opening (300), the inner lining plate (220) is fixedly connected with the bottom of a cavity and the bottom side of the guide plate (210), the inner lining plate (220) and the guide plate (210) divide the cavity into an operation area and a cooling area, ventilation holes are formed in the inner lining plate (220), the spraying unit (100) comprises a liquid supply assembly and a spraying opening (110), the spraying opening (110) is arranged in the cooling area, and the spraying opening (110) is located on the lower side of the ventilation opening (300) and communicated with the liquid supply assembly.

2. The fume hood cooling system according to claim 1, wherein the liquid supply assembly comprises a liquid pump (130), a liquid inlet pipe (140) and a liquid outlet pipe, one end of the liquid outlet pipe is communicated with the spraying port (110), the other end of the liquid outlet pipe is communicated with the liquid pump (130), and the liquid pump (130) is used for driving liquid to flow from the liquid inlet pipe (140) to the liquid outlet pipe.

3. The fume hood cooling system according to claim 2, wherein the liquid supply assembly further comprises a collecting plate (150), the collecting plate (150) is arranged at the bottom of the cooling zone, one end of the liquid inlet pipeline (140) is arranged on the collecting plate (150) in a penetrating manner, and the other end of the liquid inlet pipeline (140) is communicated with the liquid pump (130).

4. The fume hood cooling system according to claim 3, wherein said collecting plate (150) has an inclined surface, and said liquid inlet pipe (140) is inserted into a bottom end of said inclined surface.

5. The fume hood temperature reduction system according to claim 1, wherein the heat exchange unit (200) further comprises a condensation plate (230), the condensation plate (230) being disposed between the vent (300) and the baffle (210).

6. The fume hood cooling system according to claim 5, wherein a baffle slot is provided on a side of the condensation plate (230) near the vent (300), the baffle slot opening towards an end of the baffle plate (210) near the operating area.

7. The fume hood cooling system according to claim 1, wherein an access opening (223) is arranged on the inner lining plate (220), and the height of the access opening (223) is higher than the liquid level of the cooling liquid in the cooling area.

8. The fume hood cooling system according to claim 1, wherein a shielding cover (222) is further disposed on a side of the inner lining plate (220) facing the cooling area, and a vent hole (221) is disposed on a lower side of the shielding cover (222).

9. The fume hood cooling system according to claim 8, wherein said shield cover (222) comprises a ring plate, one end of which is fitted to the contour of the upper side of said ventilation hole (221).

10. The fume hood cooling system according to claim 1, wherein a plurality of through holes are provided on the spray opening (110), and the through holes are used for atomizing and spraying liquid.

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