Environment-friendly kitchen oil fume purification and extraction system

Abstract

An environment-friendly kitchen oil fume purification and extraction system, comprising: an oil fume extraction system, which generates a negative pressure by means of a negative-pressure device, so as to suction oil fume in a kitchen; an oil fume cooling and condensing cavity, which is internally provided with a filter screen configured to cool and condense oil fume, wherein the oil fume cooling and condensing cavity is provided with a condensed-gas input port; and a ventilation device, which suctions air in a ventilation space, compresses the air by means of a compression device and feeds same into a vortex tube, wherein a low-temperature gas output end of the vortex tube is connected to the condensed-gas input port of the oil fume cooling and condensing cavity. By means of using the oil fume cooling and condensing cavity to reduce the internal temperature thereof by means of a low-temperature gas generated by the vortex tube, the filter screen is kept in a low-temperature environment; and the oil fume is cooled and collected when passing through the low-temperature filter screen, thereby greatly reducing the amount of oil fume discharged.

Description

Environmentally friendly kitchen fume purification and exhaust system

[0001] The present invention relates to an exhaust system for purifying kitchen fume, in particular to an environmentally friendly exhaust system that combines indoor ventilation and kitchen fume purification.

[0002] Restaurant kitchens produce large amounts of oil smoke during the cooking process, especially during frying and stir-frying. Most existing restaurants' oil smoke emissions are untreated; fans generate negative pressure to extract the smoke from the kitchen and then release it directly into the environment. These high-temperature fumes, which may contain carcinogens, are directly discharged and inhaled by the human body, potentially affecting human health. Even for environmental reasons, some exhaust systems incorporate oil fume separators. These only collect the oil smoke after it condenses on the cooler fan blades and is then ejected by the centrifugal force of the rotating blades. However, as the high-temperature smoke heats up, the fan blades heat up, significantly affecting the condensation of the smoke on the surface. Consequently, the proportion of oil smoke collected in actual use is too low, and the separation effect is suboptimal.

[0003] The purpose of the present invention is to provide an environmentally friendly kitchen fume purification and exhaust system, which achieves ventilation by sucking air from the ventilation space through a vortex tube and generates low-temperature gas which is transported to the exhaust system to condense and collect the fume, thereby achieving the effects of ventilation and fume separation, being more environmentally friendly and greatly improving the fume separation efficiency.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The kitchen environmental protection oil fume purification exhaust system is characterized by:

[0006] The oil fume extraction system has an air inlet set in the kitchen. The negative pressure device generates negative pressure to suck the oil fume in the kitchen into the air inlet and transmit it through the pipeline;

[0007] The oil fume cooling and condensing chamber is provided with a filter for cooling and condensing the oil fume; the oil fume cooling and condensing chamber is provided with a condensed gas input port;

[0008] vortex tube;

[0009] A ventilation device, which sucks air from the ventilation space through a compression device and compresses the air by the compression device and sends it to the compressed air inlet of the vortex tube, and the low-temperature gas output end of the vortex tube is connected to the condensed gas input port of the oil fume cooling condensation chamber;

[0010] The gas in the ventilation space is compressed by a compression device to generate high-pressure gas and then sent to the vortex tube. The low-temperature gas output end of the vortex tube generates low-temperature gas and is transported to the oil fume cooling condensation chamber to cool the filter. The oil fume generated in the kitchen is sucked into the oil fume cooling condensation chamber through a negative pressure device. Under the cooling of the low-temperature gas, the oil fume is condensed and separated through the cooled filter. The separated air is discharged from the air outlet of the oil fume cooling condensation chamber and connected to the main exhaust port of the system through a pipeline.

[0011] Preferably, the high-temperature gas output end of the vortex tube is connected to the main exhaust port of the system and is mixed with the air at the main exhaust port.

[0012] Preferably, it further comprises a water storage tank and a heat exchanger, the high temperature gas output end of the vortex tube is connected to the heat exchanger, and the heat exchanger is immersed in the water storage tank to heat the water.

[0013] Preferably, the heat exchanger is a closed box with a gas inlet and a gas outlet at both ends of the box respectively. The gas inlet is connected to the high-temperature gas output end of the vortex tube through a pipe, and the gas outlet is connected to the main exhaust port of the system; heat-absorbing fins are arranged obliquely along the flow direction of the gas in the box to form a circuitous gas channel.

[0014] Preferably, the heat exchanger is a closed box with a gas inlet and a gas outlet at both ends of the box respectively. The gas inlet is connected to the high-temperature gas output end of the vortex tube through a pipe, and the gas outlet is connected to the main exhaust port of the system; honeycomb-shaped heat-absorbing fins are arranged in the box along the flow direction of the gas.

[0015] Preferably, a tableware preheating cabinet is also included, with exhaust holes evenly arranged on the bottom of the cabinet, the high-temperature gas output end of the vortex tube is connected to the exhaust holes, and the tableware is placed above the exhaust holes to be heated by the high-temperature gas.

[0016] Preferably, the negative pressure device of the oil fume extraction system is connected to the rear of the oil fume cooling and condensing chamber through a pipe, that is, the air outlet of the oil fume cooling and condensing chamber is connected to the air inlet of the negative pressure device, and the air outlet of the negative pressure device is connected to the high-temperature gas output end of the vortex tube through a pipe.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the device of the present invention uses an oil fume cooling condensation chamber to cool the internal temperature to 5-8°C through the low-temperature gas generated by the vortex tube, and keeps the filter in a low-temperature environment; the oil fume is cooled and collected when passing through the low-temperature filter, and the oil fume is condensed into liquid from the smoke point and retained in the oil fume cooling condensation chamber to be collected, thereby greatly reducing the amount of oil fume emissions. The oil fume condensed in the oil fume cooling condensation chamber and the filter can be cleaned and replaced regularly as needed. The air inlet of the vortex tube is connected to the ventilation device, so the air in the space to be ventilated can also be compressed and supplied to the vortex tube to achieve refrigeration. The combination of the two can make better use of energy to complete different tasks. In addition, the device of the present invention is low-cost and only requires a simple modification of the existing oil fume exhaust system to reduce the emission of harmful substances in the air, which is more environmentally friendly.

[0018] The present invention will be further described below with reference to the accompanying drawings. Figure 1

[0019] It is a structural schematic diagram of the present invention. Figure 2

[0020] It is a structural diagram of the water tank. Figure 3

[0021] It is a structural diagram of the preheating cabinet.

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In order to solve the technical problem of the lack of fume separation in the existing kitchen fume exhaust system, please refer to the following technical solutions:

[0024] The environmentally friendly kitchen fume purification and extraction system includes an oil fume extraction system 1, an oil fume cooling and condensing chamber 3, a ventilation device 5, and a vortex tube 7. The oil fume extraction system 1 can be the oil fume exhaust equipment currently used in kitchens. Specifically, the oil fume extraction system 1 typically uses a motor and fan blades to generate negative pressure within the airway, drawing kitchen fumes through an air inlet 2 and transporting them via a pipeline to the oil fume cooling and condensing chamber 3.

[0025] Specifically, the negative pressure device 9 of the fume extraction system 1 is connected to the rear of the fume cooling and condensing chamber 3 via a pipe. Specifically, the air outlet of the fume cooling and condensing chamber 3 is connected to the air inlet of the negative pressure device 9, and the air outlet of the negative pressure device 9 is connected to the high-temperature gas output end of the vortex tube 7 via a pipe. This creates a negative pressure in the fume cooling and condensing chamber 3. Even if the filter 4 therein becomes partially clogged due to condensed fume, the fume in the kitchen can still be drawn in, achieving a better performance.

[0026] The fume cooling and condensing chamber 3 houses a filter 4 and a cold air inlet. The filter 4, typically a metal-supported grille, rapidly cools the air and facilitates condensation of the fume on its surface. It also does not obstruct air flow, thus preventing it from affecting the normal operation of the fume extraction system. The fume cooling and condensing chamber 3 also features a condensed gas inlet connected to the low-temperature gas output of the vortex tube 7. The low-temperature gas generated by the vortex tube 7 is transported to the fume cooling and condensing chamber 3 to cool the filter 4.

[0027] A ventilation device 5 is usually installed in a restaurant to introduce fresh air from outside into the restaurant and to discharge dirty air from the restaurant to the outside. Commonly used devices include ventilation fans or central air conditioning systems. The ventilation device 5 of the present invention is different from the existing ones. It uses a compression device 6 to suck the air in the restaurant and then inputs the compressed air into the air inlet of the vortex tube 7. According to the working characteristics of the vortex tube 7, low-temperature gas and high-temperature gas are respectively input on both sides of the vortex tube 7. By adjusting the air flow at the air inlet, the temperature of the low-temperature gas and the high-temperature gas can be adjusted. In this way, the restaurant can be ventilated and the ventilation gas can be used to generate cooling or heating effects at the same time.

[0028] The low-temperature gas generated by the vortex tube 7 is transported to the oil fume cooling and condensing chamber 3 to achieve condensation of the oil fume, and the high-temperature gas generated can also be further utilized, as shown in the following relevant embodiments.

[0029] In the first embodiment, if the high-temperature gas outlet of the vortex tube 7 is directly discharged into the environment without heat exchange, it may cause discomfort to others. However, the air in the oil smoke is cooled by the cooling condensation chamber 3. Therefore, the low-temperature air in the cooling condensation chamber 3 can be mixed with the high-temperature gas of the vortex tube 7 at the system's main exhaust port 8, and the temperature of the high-temperature gas can be reduced before being discharged into the environment, which is more ideal.

[0030] In the second embodiment, hot water is often needed in the kitchen, so the high-temperature gas generated by the vortex tube 7 can be fully utilized for heating, such as heating water in a water tank. For reference, the high-temperature gas output end of the vortex tube 7 is connected to a heat exchanger 10, which heats the water in the water tank. To achieve a higher heat exchange rate, it is necessary to increase the specific surface area of ​​the heat exchanger 10 in contact with the high-temperature gas. Specifically, the present invention provides two structural implementations. One is that heat-absorbing fins 11 are arranged obliquely along the gas flow direction within the box to form a circuitous gas channel. After the high-temperature gas enters the heat exchanger 10, it will flow along the heat-absorbing fins 11 at a reduced flow rate. This increases the residence time of the high-temperature gas within the heat exchanger 10, allowing the heat to be fully transferred to the heat-absorbing fins 11. At the same time, the heat-absorbing fins 11 also significantly increase the surface area of ​​the heat exchanger 10 in contact with the high-temperature gas, thereby improving heat exchange efficiency. Second, honeycomb-shaped heat-absorbing fins 11 are arranged within the box along the gas flow direction. This honeycomb design increases the heat absorption area while minimizing the resistance to high-temperature gas flow, thereby reducing fluid resistance to meet the needs of various usage scenarios. The heat exchanger 10 and heat-absorbing fins 11 are typically made of materials with good thermal conductivity, such as copper.

[0031] In the third embodiment, the high-temperature gas of the vortex tube 7 can also be used to preheat tableware. For reference, exhaust holes 12 are evenly arranged on the floor of the tableware preheating cabinet. The high-temperature gas output end of the vortex tube 7 is connected to the exhaust hole 12. The tableware is placed above the exhaust hole 12 and heated by the high-temperature gas, such as for high-temperature disinfection of the tableware.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

Kitchen environmental protection oil fume purification and exhaust system, characterized in that: It includes an oil fume extraction system, whose air inlet is arranged in the kitchen. Negative pressure is generated by a negative pressure device to suck the oil fume in the kitchen into the air inlet and transmit it through a pipeline; an oil fume cooling and condensing chamber, in which a filter screen for cooling and condensing the oil fume is arranged; the oil fume cooling and condensing chamber is provided with a condensed gas inlet; a vortex tube; a ventilation device, which sucks the air in the ventilation space through a compression device and compresses and sends it into the compressed air inlet of the vortex tube. The low-temperature gas output end of the vortex tube is connected to the condensed gas inlet of the oil fume cooling and condensing chamber; the gas in the ventilation space is sent into the vortex tube after being compressed by the compression device to generate high-pressure gas. The low-temperature gas output end of the vortex tube generates low-temperature gas and transports it to the oil fume cooling and condensing chamber to cool the filter screen; the oil fume generated in the kitchen is sucked into the oil fume cooling and condensing chamber through the negative pressure device. Under the cooling of the low-temperature gas, the oil fume condenses and separates after passing through the cooled filter screen. The separated air is discharged from the air outlet of the oil fume cooling and condensing chamber and connected to the total exhaust port of the system through a pipeline. The kitchen environmental protection oil fume purification and extraction system according to claim 1, characterized in that: The high-temperature gas output end of the vortex tube is connected to the total exhaust port of the system and mixed with the air at the total exhaust port. The kitchen environmental protection oil fume purification and extraction system according to claim 1, characterized in that: It also includes a water storage tank and a heat exchanger. The high-temperature gas output end of the vortex tube is connected to the heat exchanger, and the heat exchanger is immersed in the water storage tank to heat the water body. The kitchen environmental protection oil fume purification and extraction system according to claim 3, characterized in that: The heat exchanger is a closed box body. Gas inlets and gas outlets are respectively arranged at both ends of the box body. The gas inlet is connected to the high-temperature gas output end of the vortex tube through a pipeline, and the gas outlet is connected to the total exhaust port of the system; heat absorption fins are arranged obliquely along the gas flow direction in the box body to form a circuitous gas channel. The kitchen environmental protection oil fume purification and extraction system according to claim 3, wherein: The heat exchanger is a closed box body. Gas inlets and gas outlets are respectively arranged at both ends of the box body. The gas inlet is connected to the high-temperature gas output end of the vortex tube through a pipeline, and the gas outlet is connected to the total exhaust port of the system; honeycomb-shaped heat absorption fins are arranged along the gas flow direction in the box body. The kitchen environmental protection oil fume purification and extraction system according to claim 1, characterized in that: It also includes a tableware preheating cabinet. Exhaust holes are evenly arranged at the bottom of the cabinet. The high-temperature gas output end of the vortex tube is connected to the exhaust holes, and the tableware is placed above the exhaust holes and heated by the high-temperature gas. The kitchen environmental protection oil fume purification and exhaust system according to claim 1, characterized in that: The negative pressure device of the oil fume extraction system is connected to the rear of the oil fume cooling and condensing chamber through a pipeline, that is, the air outlet of the oil fume cooling and condensing chamber is connected to the air inlet of the negative pressure device, and the air outlet of the negative pressure device is connected to the high-temperature gas output end of the vortex tube through a pipeline.

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