Internal Circulation Range Hood

Abstract

Disclosed is an internal circulation range hood, comprising a housing, an air-suction inlet, a fan, a cold compression chamber, an air-guide outlet, and a cooling device, wherein the air-suction inlet is in communication with the cold compression chamber and the cold compression chamber is in communication with the air-guide outlet. The fan is disposed at the air-suction inlet. The housing is in a shape of hood, and is internally provided with a hollow fume suction chamber. The air-suction inlet is arranged at atop of the fume suction chamber, and the air-guide outlet is located at a lower edge of an inner wall of the fume suction chamber, an opening of the air-guide outlet obliquely or directly faces the air-suction inlet.

Description

CROSS REFERENCE TO RELATED APPLICATION

This patent application claims the benefit and priority of Chinese Patent Application No. 202210659895.4 filed on Jun. 13, 2022, the disclosure of which is incorporated by reference herein in its entirety as part of the present application.

BACKGROUND

Related Field

The present disclosure relates to a range hood, and in particular relates to an indoor internal circulation range hood.

Related Art

Emissions of global greenhouse gas have become a hot topic of discussion in the society, and technological innovation around the goals of “carbon peak” and “carbon neutrality” is an important task we confront today. For people's livelihood carbon emissions, cooking oil fume is one of the main sources. The promotion of transformation of the kitchen appliance industry is not only conducive to the reduction of energy consumption in the industry, but also conducive to the public to practice a low-carbon lifestyle. The low-carbon development of purification equipment for the cooking oil fume in the large kitchen appliance industry and the range hood for home cooking has become more urgent.

In order to solve the pollution of cooking oil fume to the atmosphere of the society, the products of internal circulation oil fume purification technology have been shown in the society. However, it is generally adopted to add multiple purification materials or weighing modules on the basis of the traditional range hood to absorb or filter the oil fume gas generated by cooking and then return the absorbed or filtered gas into the room. Such technologies have the shortcomings that the existing filtering materials are difficult to achieve a one-time thorough purification of the oil fume gas, and the purification effect also decays with time, which in turn causes the pollution of indoor space.

BRIEF SUMMARY

For the defects in the prior art, a technical problem to be solved by the present disclosure is to provide an internal circulation range hood, which sucks the oil fume gas generated by cooking into the range hood, and meanwhile, the exhausted gas entrains the oil fume gas generated by cooking to re-enter the same channel to circulate for re-cooling treatment.

To achieve the objective described above, the present disclosure provides an internal circulation range hood, comprising a housing, an air-suction inlet, a fan, a cold compression chamber, an air-guide outlet, and a cooling device. The air-suction inlet is in communication with the cold compression chamber, and the cold compression chamber is in communication with the air-guide outlet. The fan is disposed at the air-suction inlet. The housing is in a shape of hood, and is internally provided with a hollow fume suction chamber. The air-suction inlet is arranged at a top of the fume suction chamber. The air-guide outlet is arranged at a lower edge of an inner wall of the fume suction chamber, an opening of the air-guide outlet obliquely or directly faces the air-suction inlet.

The internal circulation range hood further comprises a purification device. The purification device is disposed at any position in the housing where the gas passes.

The purification device comprises a mechanical grease separation device. The mechanical grease separation device is arranged at the air-suction inlet.

The purification device further comprises one, or any combination, of an electrostatic oil fume purifier, a HEPA (high-efficiency particulate air) filter, an activated carbon filter material, a photocatalyst filter, and an ultraviolet lamp.

The air-guide outlet has a plurality of holes provided around the lower edge of the inner wall of the fume suction chamber and arranged in the same orientation. Further, the air-guide outlet is provided obliquely, and the direction of gas obliquely exhausted from the air-guide outlet is consistent with a rotation direction of the fan.

The cooling device comprises a water inlet valve, a condenser, a water tank, and a water outlet valve, wherein the condenser is in communication with the water tank, the water inlet valve is in communication with the condenser or the water tank, the water outlet valve is in communication with the water tank, and the condenser is disposed inside the cold compression chamber.

The internal circulation range hood further comprises a thermal insulation layer. The thermal insulation layer is provided around the fume suction chamber.

In accordance with the internal circulation range hood provided by the present disclosure, under the suction and exhaust action of the fan, the gas passes through the cold compression chamber, such that the cooled gas may be ejected through the air-guide outlet, and then the ejected cooled gas entrains the oil fume gas generated by cooking to enter the same channel for re-cooling treatment, and so on. Thus, the oil fume gas generated by cooking is sucked into the internal circulation range hood without being spilled into an indoor space, and the zero emission to the outside is achieved. Meanwhile, the influence of the high-temperature oil fume gas to the room is reduced, the load of the fan is lightened, and the energy consumption is reduced.

The conception, specific structure and resulting technical effects of the present disclosure will be further described below with reference to the accompanying drawings in order to fully understand the purpose, features and effects of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partial sectional view of an internal circulation range hood in accordance with the present disclosure.

FIG. 2 is an enlarged view of position A in FIG. 1.

FIG. 3 is a schematic diagram of an internal circulation range hood in accordance with the present disclosure.

FIG. 4 is a partial sectional view of a lower portion of an internal circulation range hood.

FIG. 5 is a side sectional view of an internal circulation range hood in accordance with the present disclosure.

DETAILED DESCRIPTION OF VARIOUS EMBODIMENTS

The present disclosure is further described below with reference to the accompanying drawings.

As shown in FIG. 1 to FIG. 3, an internal circulation range hood comprises a housing 1, an air-suction inlet 2, a fan 3, a cold compression chamber 4, an air-guide outlet 5, and a cooling device 6. The air-suction inlet 2 is in communication with the cold compression chamber 4, and the cold compression chamber 4 is in communication with the air-guide outlet 5, that is, one end of the cold compression chamber 4 is in communication with the air-suction inlet 2, and the other end of the cold compression chamber is in communication with the air-guide outlet 5. The fan 3 is disposed at the air-suction inlet 2, and has a certain purification effect to the oil fume gas due to its centrifugal action.

The housing 1 is installed above a stove in a shape of hood, and is internally provided with a hollow fume suction chamber 11. The air-suction inlet 2 is arranged at a top of the fume suction chamber 11, and the air-guide outlet 5 is arranged at a lower edge of an inner wall of the fume suction chamber 11, an opening of the air-guide outlet 5 obliquely or directly faces the air-suction inlet.

As shown in FIG. 4, the air-guide outlet 5 has a plurality of holes provided around the lower edge of the inner wall of the fume suction chamber 11 and arranged in the same orientation, so as to ensure that the purified gas exhausted from the air-guide outlet 5 has a co-orientation property without generating mutual airflow disturbance. Further, the air-guide outlet 5 is provided obliquely, and the direction of the purified gas obliquely exhausted from the air-guide outlet 5 is consistent with a rotation direction of the fan 3, that is, the purified gas exhausted from the air-guide outlet 5 does not directly face the air-suction inlet, but obliquely faces the air-suction inlet. Therefore, the purified gas exhausted from the air-guide outlet 5 form a cyclonic flow, which may improve the entrainment effect and reduce the electrical power load of the fan 3.

As shown in FIG. 5, the cooling device 6 comprises a water inlet valve 61, a condenser, 62, a water tank 63, and a water outlet valve 64. The condenser 62 is in communication with the water tank 63, the water inlet valve 61 is in communication with the condenser 62 or the water tank 63, the water outlet valve 64 is in communication with the water tank 63, and the condenser 62 is disposed inside the cold compression chamber 4, so as to form a water-cooling system. Water for cooling enters the water-cooling system from the water inlet valve 61, cold water in the condenser 62, after absorbing the heat of gas in the cold compression chamber 4, becomes hot water and then flows into the water tank 63, and then a user can obtain the hot water in the water tank 63 through the water outlet valve 64. On the one hand, the cooling device 6 enables the gas in the cold compression chamber 4 to form a temperature difference with respect to the gas in the fume suction chamber 11 to facilitate the circulation flow of the gas, and on the other hand, the cooling device enables the heated housing 1 to be cooled, which protects electric elements in the housing 1, and fully recovers the waste heat generated during the cooking for the user to reuse. It is worth reminding that the cooling device 6 may also employ a scheme of using cooling liquid (agent) or cold air as a carrier for heat transfer, heat storage and temperature reduction.

The internal circulation range hold further comprises a purification device 7. The purification device 7 is disposed at any position in the housing 1 when the gas passes, such as at the air-guide outlet 2, in the cold compression chamber 4, or at the air-guide outlet 5, thus performing further purification treatment on the oil fume gas.

The purification device 7 comprises a mechanical grease separation device. The mechanical grease separation device is arranged at the air-suction inlet 2 to prevent the grease from polluting components in the housing 1.

The purification device 7 further comprises one, or any combination, of an electrostatic oil fume purifier, a HEMA filter, an activated carbon filter material, a photocatalyst filter, and an ultraviolet lamp (UV lamp) or the like. It is worth reminding that when the purification device 7 comprises a plurality of purification components and modules, the different purification components or modules may be provided separately, i.c., at different positions where the gas in the housing 1 passes.

The internal circulation range hood further comprises a thermal insulation layer 8. The thermal insulation layer 8 is provided around the fume suction chamber 11, and may be provided inside the fume suction chamber 11 (i.e., the inner wall of the fume suction chamber 11), or may be provided outside the fume suction chamber 11 (i.e., the outer wall of the fume suction chamber 11), so as to preventing the heat inside the fume suction chamber 11 from being transferred to the inside of the cold compression chamber 4. Therefore, a certain temperature difference between the cold compression cavity 4 and the fume suction chamber 11 is guaranteed to improve the efficacy, and the electric elements inside the housing 1 are further protected.

During the operation of the internal circulation range hood, the oil fume gas generated by cooking is sucked into the cold compression chamber 4 via the air-suction inlet 2 by suction generated by the fan 3, cooled by the cooling device 6, and then compressed and exhausted to the air-guide outlet 5, such that cooled and purified gas with a certain velocity can be ejected to form entrainment to oil fume gas inside the fume suction chamber 11, and with the addition of the viscous effect of the oil fume gas itself and the suction of the fan 3, the cooled and purified gas entrains the oil fume gas to re-enter the housing 1 for re-cooling and purification treatment, and so on. In other words, by using the combined action of the action of the fan, the exchange mobility of cold and hot gas and the entrainment and siphon effect of the gas, the internal circulation adsorption and purification function for the oil fume gas produced by cooking is achieved.

The preferred embodiments of the present disclosure have been described in detail above. It should be understood that those of ordinary skill in the art may make various modifications and changes according to the idea of the present disclosure without creative labor. Therefore, any technical solution that can be obtained by logical analysis, reasoning or limited experiments based on the prior art by those skilled in the art in accordance with the idea of the present disclosure shall fall within the scope determined by the claims.

Claims

1. An internal circulation range hood comprising:

a housing,

an air-suction inlet,

a fan,

a cold compression chamber,

an air-guide outlet, and

a cooling device,

wherein: the air-suction inlet is in communication with the cold compression chamber, and the cold compression chamber is in communication with the air-guide outlet; the fan is disposed at the air-suction inlet; the housing is in a shape of hood, and is internally provided with a hollow fume suction chamber; the air-suction inlet is arranged at the top of the fume suction chamber; and the air-guide outlet is arranged at a lower edge of an inner wall of the fume suction chamber, such that an opening of the air-guide outlet obliquely or directly faces the air-suction inlet.

2. The internal circulation range hood according to claim 1, further comprising a purification device, wherein the purification device is disposed at any position in the housing where gas passes.

3. The internal circulation range hood according to claim 2, wherein the purification device comprises a mechanical grease separation device, the mechanical grease separation device being arranged at the air-suction inlet.

4. The internal circulation range hood according to claim 3, wherein the purification device further comprises one, or any combination, of an electrostatic oil fume purifier, a HEPA filter, an activated carbon filter material, a photocatalyst filter, and an ultraviolet lamp.

5. The internal circulation range hood according to claim 1, wherein the air-guide outlet has a plurality of holes provided around the lower edge of the inner wall of the fume suction chamber and arranged in the same orientation.

6. The internal circulation range hood according to claim 5, wherein the air-guide outlet is provided obliquely, and the direction of gas obliquely exhausted from the air-guide outlet is consistent with a rotation direction of the fan.

7. The internal circulation range hood according to claim 1, wherein:

the cooling device comprises a water inlet valve, a condenser, a water tank, and a water outlet valve, and

the condenser is in communication with the water tank, the water inlet valve is in communication with the condenser or the water tank, the water outlet valve is in communication with the water tank, and the condenser is disposed inside the cold compression chamber.

8. The internal circulation range hood according to claim 1, further comprising a thermal insulation layer, the thermal insulation layer being provided around the fume suction chamber.