Cooking appliance with flue gas circulation

Abstract

The present invention relates to the technical field of household appliances, and particularly relates to a cooking appliance with flue gas circulation. A cooking appliance with flue gas circulation includes a pot support, a burner head, and a gas mixing chamber. A flue gas flow channel is provided on the pot support, and the flue gas flow channel has at least one flue gas inlet facing the burner head; and a power exhaust device, which is connected with a pipeline. One end of the pipeline communicates with the flue gas flow channel, and the other end communicates with the gas mixing chamber. In the cooking appliance with flue gas circulation of the present invention, a flue gas flow channel is provided on the pot support. During the cooking process, the toxic and harmful flue gas is, under the action of the power exhaust device, enters the gas mixing chamber through the flue gas inlet on the flue gas flow channel. Then, it enters the burner head again through the entrainment action of the nozzle in the gas mixing chamber to achieve secondary combustion, thereby reducing the content of nitrogen oxides during the combustion of the gas stove.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular to a cooking utensil capable of smoke circulation. Background Art

[0002] With the continuous development of the gas industry, my country's fuel structure is undergoing tremendous changes, with the transition from coal and oil to gas. Natural gas and liquefied petroleum gas have become the most commonly used gas resources today.

[0003] However, when the gas is burned to provide heat energy, a large amount of smoke will be produced. When the gas cannot be fully burned, smoke such as carbon monoxide and nitrogen oxides will be produced. Among them, nitrogen oxides have a strong affinity for hemoglobin and are very harmful to the human body.

[0004] Therefore, with the improvement of living quality, people's requirements for the air quality of kitchen space have increased, and there is an urgent need to reduce the harmful fumes generated by cooking utensils, especially gas stoves, during the cooking process. Summary of the invention

[0005] Therefore, the present invention aims to reduce the harmful smoke emitted to the external environment by cooking appliances such as gas stoves during the cooking process, thereby providing a cooking appliance capable of smoke circulation.

[0006] A cooking appliance capable of flue gas circulation comprises a pot support, a burner and an air mixing chamber, wherein the pot support is provided with a flue gas flow passage having at least one flue gas inlet arranged toward the burner; and a power exhaust device, to which a pipeline is connected, one end of the pipeline being connected to the flue gas flow passage and the other end being connected to the air mixing chamber.

[0007] Furthermore, the flue gas flow channel is a pipeline structure formed on the surface of the pot support.

[0008] Furthermore, the pot support is constructed as a hollow structure, and its inner space is used as the flue gas flow passage.

[0009] Furthermore, the pot support has a supporting portion for receiving the stove, and the smoke inlet is arranged on the lower end surface of the supporting portion.

[0010] Furthermore, the pot support has a base abutting against the burner, the base is provided with at least one first smoke outlet, and the pipeline on the power exhaust device is connected to the smoke outlet.

[0011] Furthermore, it also includes an energy gathering ring, and a second smoke outlet is arranged on the peripheral wall of the energy gathering ring.

[0012] Furthermore, the energy gathering ring is integrally formed on the pot support, and at a preset forming position, the second smoke outlet is arranged close to the smoke inlet.

[0013] Further, the pipeline includes a first flue gas return pipeline connected between the first flue gas outlet and the air inlet of the power air extraction device, and a second flue gas return pipeline connected between the air outlet of the power air extraction device and the gas mixing chamber.

[0014] Further, a magnetic attraction structure is provided at the end of the first flue gas outlet, and the first flue gas return pipeline is detachably arranged on the first flue gas outlet through the magnetic attraction structure.

[0015] The technical solution of the present invention has the following advantages:

[0016] 1. In the cooking appliance with flue gas circulation of the present invention, a flue gas flow channel is arranged on the pot support. During the cooking process, the toxic and harmful flue gas generated enters the gas mixing chamber through the flue gas inlet on the flue gas flow channel under the action of the power air extraction device. Then, it enters the burner again through the ejecting action of the nozzle in the gas mixing chamber to achieve secondary combustion.

[0017] According to the reaction principle of thermal NOx: N2+O = NO+N, N+O2 = NO+O (both are reversible reactions), it can be concluded that when the N2 content in the combustion decreases, the content of the intermediate product NO decreases, thereby reducing the content of nitrogen oxides during the combustion of the gas stove. In this way, it circulates repeatedly to achieve the effects of energy saving and reducing nitrogen oxide emissions.

[0018] 2. In the cooking appliance with flue gas circulation of the present invention, the pot support is directly processed into a hollow structure, and the internal space of the hollow pot support is directly used as the flue gas flow channel, realizing the arrangement of the flue gas flow channel inside the pot support, thereby avoiding the increase in the volume of the pot support and the complexity of the structure caused by realizing flue gas circulation.

[0019] 3. In the cooking appliance with flue gas circulation of the present invention, the flue gas inlet is arranged on the lower end surface of the support part, ensuring that the flue gas inlet is close to the burner above the stove head, and the position where the flue gas is generated is mainly concentrated at the burner, so that the flue gas inlet has a good flue gas collection effect.

[0020] 4. In the cooking appliance with flue gas circulation of the present invention, the first flue gas outlet is arranged on the base, and the base is located at the lower part of the entire pot support. Therefore, during the flue gas circulation process, the flue gas with a certain amount of heat will basically fill the entire pot support and conduct its own heat to the pot support to the maximum extent, so that this part of the heat acts on the cooking appliance through the pot support, realizing the effective utilization of the heat energy of the flue gas and improving the heat energy utilization rate of the gas.

[0021] 5. In the cooking appliance with flue gas circulation of the present invention, the energy concentrating ring is integrally formed on the pot support. When the two are formed, the second flue gas outlet is arranged close to the flue gas inlet. Since the pot support is generally movably supported around the burner and can rotate around the burner. When the user moves the cookware, it is easy to cause the movement of the pot support, making the second flue gas outlet far away from the flue gas inlet, resulting in a decrease in the ability of the flue gas inlet to collect flue gas. Therefore, the two are processed into one body to ensure that the second flue gas outlet is always close to the flue gas inlet.

[0022] 6. A magnetic attraction structure is arranged at the end of the first flue gas outlet in the cooking appliance with flue gas circulation of the present invention, and the first flue gas return pipeline is detachably arranged on the first flue gas outlet through the magnetic attraction structure, thus facilitating the disassembly and cleaning of the pot support and the energy concentrating ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 The front view of the cooking device with flue gas circulation in the embodiment provided by the present invention;

[0025] Figure 2 The top view of the cooking device with flue gas circulation in the embodiment provided by the present invention;

[0026] Figure 3 The cross-sectional view of the pot support in the embodiment provided by the present invention;

[0027] Figure 4 The assembly structure diagram of the first flue gas return pipeline and the second flue gas outlet in the embodiment provided by the present invention.

[0028] Description of the reference numerals:

[0029] 1 - Pot support; 11 - Flue gas flow channel; 12 - Flue gas inlet; 13 - Support part; 14 - Base; 15 - First flue gas outlet;

[0030] 2 - Burner head;

[0031] 3 - Gas mixing chamber;

[0032] 4 - Power air extraction device;

[0033] 5 - Energy concentrating ring; 51 - Second flue gas outlet;

[0034] 6 - Pipeline; 61 - First flue gas return pipeline; 62 - Second flue gas return pipeline;

[0035] 7 - Magnetic attraction structure. Detailed implementation mode

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0039] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Embodiment 1

[0041] As Figures 1 to 4 shown, a cooking appliance capable of flue gas circulation provided in this embodiment includes a pot support 1, a burner 2, and a gas mixing chamber 3. A flue gas flow channel 11 is provided on the pot support 1, and the flue gas flow channel 11 has at least one flue gas inlet 12 facing the burner 2; and a power extraction device 4, which is connected with a pipeline 6, one end of the pipeline 6 is communicated with the flue gas flow channel 11, and the other end is communicated with the gas mixing chamber 3.

[0042] The cooking appliance in this embodiment is specifically a household gas stove.

[0043] It should also be noted that the power extraction device 4 in this embodiment is a commonly used blower.

[0044] In the cooking appliance with flue gas circulation in this embodiment, a flue gas flow channel 11 is provided on the pot support 1. During the cooking process, the toxic and harmful flue gas generated enters the mixing chamber 3 through the flue gas inlet 12 on the flue gas flow channel 11 under the action of the power extraction device 4. Then, it enters the burner again through the ejecting action of the nozzle in the mixing chamber 3 to achieve secondary combustion. According to the thermal NOx reaction principle: N2 + O = NO + N, N + O2 = NO + O (both are reversible reactions), it can be concluded that when the N2 content in the combustion decreases, the content of the intermediate product NO decreases, thereby reducing the content of nitrogen oxides during the combustion of the gas stove. In this way, the cycle repeats to achieve the effects of energy conservation and reduction of nitrogen oxide emissions.

[0045] As Figure 3 shown, in this embodiment, the pot support 1 is processed into a hollow structure, which is generally made of cast iron and integrally formed by casting. The formed internal space is used as the flue gas flow channel 11. The pot support 1 with this structure embeds the flue gas flow channel 11 therein, avoiding the occupation of the combustion space by the flue gas flow channel 11 and also reducing the complexity of the structure of the pot support 1.

[0046] Of course, in some other embodiments, the flue gas flow channel 11 can be designed as a pipeline structure and fixed on the surface of the pot support 1 by welding or connecting and locking. Since the flue gas flow channel 11 is on the outer surface of the pot support 1 and is easily roasted by the flame, its material needs to be a metal with good heat resistance, such as the cast iron material used to prepare the pot support 1.

[0047] In order to collect the flue gas generated near the burner, the hollow pot support 1 in this embodiment needs to communicate with the outside, that is, the above-mentioned flue gas inlet 12. In order to improve the collection effect of the flue gas at the flue gas inlet 12, in this embodiment, the flue gas inlet 12 is processed on the lower end surface of the support part 13 of the pot support 1, because it is closer to the burner, and the flue gas generated by the burner can be adsorbed by the flue gas inlet 12 more quickly and timely.

[0048] In addition, the above-mentioned support part 13 is the part on the pot support 1 used to support the cooking appliance, and generally at least three are provided. In this embodiment, there are four. In order to further improve the collection effect of the flue gas, a flue gas inlet 12 is processed on the lower end surface of each support part 13.

[0049] The shape of the flue gas inlet 12 can be circular, triangular, square, etc. For the convenience of processing, a circular shape is adopted in this embodiment.

[0050] Similarly, the number of flue gas inlets 12 on each support portion 13 is multiple, and they can be distributed in a honeycomb shape. In this embodiment, for the convenience of processing, a single distributed flue gas inlet 12 is directly adopted, and its size is enlarged to meet the flow requirement of the flue gas.

[0051] In order to realize the connection between the flue gas in the hollow pot support 1 and the power exhaust device, in this embodiment, a first flue gas outlet 15 is processed on the base 14 of the pot support 1. The first flue gas outlet 15 is similar in shape to the flue gas inlet 12. At the same time, the first flue gas outlet 15 is arranged on the base 14, and the base 14 is located at the lower part of the entire pot support 1. Therefore, during the flue gas circulation process, the flue gas with a certain amount of heat will basically fill the entire pot support 1 and conduct its own heat to the pot support 1 to the maximum extent. Thus, this part of the heat acts on the stove through the pot support 1, realizing the effective utilization of the heat energy of the flue gas and improving the heat energy utilization rate of the gas.

[0052] The number of the first flue gas outlets 15 in this embodiment is one, for the convenience of processing and cost reduction. Correspondingly, a first flue gas return pipeline 61 is connected below the first flue gas outlet 15.

[0053] As Figure 4 shown, since the surface of the gas stove needs to be cleaned frequently, the pot support 1 needs to be moved. In order to facilitate the disassembly of the pot support 1, in this embodiment, a magnetic structure 7 is embedded and installed at the end of the first flue gas outlet 15. The magnetic structure 7 in this embodiment is a common magnetic snap. A corresponding magnetic snap or magnetic material is installed at the pipeline joint of the first flue gas return pipeline 61. When the first flue gas return pipeline 61 is inserted and installed onto the first flue gas outlet 15, it is adsorbed and fixed by the magnetic snap.

[0054] Generally, an energy-gathering ring 5 is installed on the burner of the existing gas stove to improve the utilization rate of combustion heat energy. Therefore, the flue gas generated in the burner needs to pass through the energy-gathering ring 5 and enter the flue gas flow channel 11 in this embodiment.

[0055] In order to realize the introduction of the flue gas at the burner into the flue gas flow channel, a second flue gas outlet 51 is processed on the circumferential wall of the energy-gathering ring 5 in this embodiment. As Figure 2 shown, the shape of the second flue gas outlet 51 is circular, and it is distributed at equal intervals along the circumferential direction of the energy-gathering ring 5 to ensure the uniform discharge of the flue gas at the burner.

[0056] Since the pot support 1 is generally movably supported around the burner and can rotate around the burner. When the user moves the cookware, it is easy to cause the movement of the pot support 1, making the second flue gas outlet 51 away from the flue gas inlet 12, resulting in a decrease in the ability of the flue gas inlet 12 to collect flue gas. Therefore, in this embodiment, the two are processed into one body to ensure that the second flue gas outlet 51 is always close to the flue gas inlet 12.

[0057] Specifically, when the two are integrally formed with each other, the lower end surface of the support portion 13 of the pot support 1 in this embodiment is integrally formed with a partial peripheral surface of the energy-gathering ring 5, which can increase the structural strength of the support portion 13 of the pot support 1.

[0058] When the gas stove in this embodiment is working, the power air extraction device 4 is turned on. Under the suction of the fan, a negative pressure is generated at the flue gas inlet 12. The flue gas generated by the burner, under the action of air pressure, sequentially enters the flue gas flow channel 11, the first flue gas return pipeline 61, and the second flue gas return pipeline 62 through the second flue gas outlet 51 on the energy-gathering ring 5, and finally enters the gas mixing chamber 3. The gas mixing chamber 3 is connected with a gas pipeline and an oxygen pipeline at the same time. Under the action of the nozzle, it enters the injection chamber and then enters the burner for secondary combustion.

[0059] Obviously, the above-mentioned embodiments are only examples given for clear illustration, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A cooking appliance with flue gas circulation, comprising a pot support (1), a burner head (2) and a gas mixing chamber (3), characterized in that, a flue gas flow channel (11) is provided on the pot support (1), and the flue gas flow channel (11) has at least one flue gas inlet (12) arranged towards the burner head (2); and a power suction device (4), to which a pipeline (6) is connected. One end of the pipeline (6) communicates with the flue gas flow channel (11), and the other end communicates with the gas mixing chamber (3). The pot support (1) is constructed as a hollow structure, and its internal space is used as the flue gas flow channel (11). The pot support (1) has a support portion (13) for receiving a cooking appliance, and the flue gas inlet (12) is arranged on the lower end surface of the support portion (13). It further includes an energy-gathering ring (5). A second flue gas outlet (51) is provided on the peripheral wall of the energy-gathering ring (5). The flue gas generated by the burner enters the flue gas flow channel (11), the first flue gas return pipeline (61), and the second flue gas return pipeline (62) in sequence through the second flue gas outlet (51) on the energy-gathering ring (5), and finally enters the gas mixing chamber (3) under the action of air pressure. The energy-gathering ring (5) is integrally formed on the pot support (1), and at a preset forming position, the second flue gas outlet (51) is arranged close to the flue gas inlet (12).

2. The cooking appliance capable of flue gas circulation according to claim 1, wherein, The flue gas flow channel (11) is a pipeline structure formed on the surface of the pot support (1).

3. The cooking appliance capable of flue gas circulation according to claim 1, characterized in that, The pot support (1) has a base (14) abutted against the burner head (2), and at least one first flue gas outlet (15) is provided on the base (14). The pipeline on the power suction device (4) is connected to the first flue gas outlet (15).

4. The cooking appliance capable of flue gas circulation according to claim 3, characterized in that The pipeline (6) includes a first flue gas return pipeline (61) connected between the first flue gas outlet (15) and the air inlet of the power suction device (4), and a second flue gas return pipeline (62) connected between the air outlet of the power suction device (4) and the gas mixing chamber (3).

5. The cooking appliance capable of flue gas circulation according to claim 4, wherein, A magnetic attraction structure (7) is provided at the end of the first flue gas outlet (15), and the first flue gas return pipeline (61) is detachably arranged on the first flue gas outlet (15) through the magnetic attraction structure (7).

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