Dual-fuel gas appliance

Abstract

The dual-fuel gas appliance comprises a shell, a combustor, a gas proportional valve, a fuel pump and a heating body, the combustor, the gas proportional valve, the fuel pump and the heating body are arranged in the shell, the fuel pump is communicated with the interior of the heating body, the heating body and the gas proportional valve are communicated with a gas distributing pipe of the combustor, and the fuel pump is used for pumping liquid fuel to the heating body. And the heating body is used for heating liquid fuel sent to the heating body by a heat pump, so that the liquid fuel flows into the gas distribution pipe after being gasified and is injected into the combustor through the nozzle for combustion. According to the dual-fuel gas appliance, liquid fuel or natural gas can be adopted as fuel, the dual-fuel gas appliance can be suitable for the use environments of cities and villages and towns at the same time, and sufficient hot water can be rapidly provided for users of cities and villages and towns.

Description

Technical Field

[0001] The present application relates to water heaters with heat generating devices, such as boilers, flow heaters, and storage water heaters, and particularly relates to a dual-fuel gas appliance. Background Art

[0002] Water heaters are an important type of domestic gas appliances. Currently, in China, there are mainly natural gas water heaters and electric water heaters. Natural gas water heaters do not produce a large amount of carbon dioxide and other harmful gases during combustion, causing little environmental pollution; and the heating speed of natural gas water heaters is relatively fast, and a large amount of hot water can be provided in a short time. Since natural gas is a renewable energy source, its usage cost is also relatively low.

[0003] However, for gas water heaters using natural gas, they can only be promoted in cities with resources. In villages and towns lacking natural gas and fuel, only electric water heaters can be used at present. Electric water heaters are large in volume, have a long heating time, consume a large amount of electricity, and have insufficient water supply.

[0004] Therefore, there is a need to provide a dual-fuel gas appliance that can be applied to both cities and rural areas. Summary of the Invention

[0005] The present utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present utility model provides a dual-fuel gas appliance applicable to different fuels, enabling the dual-fuel gas appliance to meet the usage conditions in both cities and villages and towns. The technical solutions adopted include:

[0006] A dual-fuel gas appliance includes a housing, and a burner, a gas proportional valve, a fuel pump, and a heating element disposed inside the housing. The fuel pump is internally connected to the heating element, and the heating element and the gas proportional valve are respectively connected to the gas distribution pipes of the burner. The fuel pump is used to pump liquid fuel to the heating element, and the heating element is used to heat the liquid fuel pumped to it to vaporize and then flow into the gas distribution pipes and be injected into the burner through nozzles for combustion.

[0007] A technical solution adopted by an embodiment of the present utility model to solve its technical problems is: further including a heating element, the heating element is installed on the gas distribution pipeline and is used to heat the gas distribution pipeline.

[0008] A technical solution adopted by an embodiment of the present utility model to solve its technical problems is: further including a heating element, and an exhaust valve is provided on the fuel pump.

[0009] A technical solution adopted by an embodiment of the present utility model to solve its technical problems is: the heating element is disposed inside the combustion chamber and above the burner.

[0010] One embodiment of the present utility model solves the technical problems thereof by adopting the following technical solution: It further includes a controller and a mode selection button electrically connected to the controller respectively. The mode selection button is used to switch between the liquid fuel mode and the gas mode.

[0011] Advantages of the present utility model:

[0012] When the gas appliance is in use and liquid fuel is used as the fuel, the inlet of the fuel pump is communicated with the liquid fuel source. The heating element heats up to a temperature higher than the vaporization temperature of the liquid fuel. The fuel pump pumps the liquid fuel into the heating element. The liquid fuel entering the heating element is heated by the heating element and vaporized. The vaporized liquid fuel then enters the manifold of the burner and is injected into the burner through the nozzle for combustion.

[0013] When the gas appliance is in use and natural gas is used as the fuel, the gas proportional valve opens and delivers gas into the manifold. The gas is injected into the burner through the nozzle for combustion.

[0014] The dual-fuel gas appliance of the present application can use liquid fuel or natural gas as the fuel, can be applicable to the usage environments in both cities and villages, and can quickly provide sufficient hot water for users in cities and villages. Description of the Drawings

[0015] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0016] Figure 1 is a schematic structural diagram of the dual-fuel gas appliance in the embodiment of the present application;

[0017] Figure 2 is a schematic structural diagram of the fuel pump in the embodiment of the present application;

[0018] Figure 3 is a schematic installation structural diagram of the heating element in the embodiment of the present application;

[0019] Figure 4 is a schematic installation structural diagram of the heating element in the embodiment of the present application;

[0020] Figure 5 is a schematic structural diagram of the heating element in the embodiment of the present application. Detailed Embodiments

[0021] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0022] In the description of the present utility model, the meaning of "a plurality of" is more than two. Understandings such as "greater than", "less than", and "exceeding" do not include the present number, and understandings such as "above", "below", and "within" include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0023] In the description of the present utility model, it should be understood that regarding the orientation description, such as the orientation or position relationship indicated by "upper", "lower", "front", "rear", "left", "right", etc., is based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0024] In the present utility model, unless otherwise clearly defined, words such as "arranged", "installed", and "connected" should be understood in a broad sense. For example, they can be directly connected, or indirectly connected through an intermediate medium; they can be fixedly connected, or detachably connected, or integrally formed; they can be mechanically connected; they can be the communication inside two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0025] Referring to Figures 1-5 , embodiments of the present application are proposed. The dual-fuel gas appliance described in this embodiment includes a housing 10 and a burner 20, a gas proportioning valve, a fuel pump 40, and a heating element 50 arranged inside the housing 10. The fuel pump 40 is internally communicated with the heating element 50. The heating element 50 and the gas proportioning valve are respectively communicated with a gas distribution pipe 60 of the burner 20. The fuel pump 40 is used to pump liquid fuel to the heating element 50. The heating element 50 is used to heat the liquid fuel pumped to it to vaporize it and then flow into the gas distribution pipe 60 and be injected into the burner 20 through a nozzle for combustion.

[0026] When the gas appliance is in use and liquid fuel is used as fuel, the inlet of the fuel pump 40 is communicated with a liquid fuel source. The heating element 50 heats up to a temperature higher than the vaporization temperature of the liquid fuel. The fuel pump 40 pumps liquid fuel into the heating element 50. The liquid fuel entering the heating element 50 is heated by the heating element 50 and vaporized. The vaporized liquid fuel then enters the gas distribution pipe 60 of the burner 20 and is injected into the burner 20 through a nozzle for combustion.

[0027] When the gas appliance is in use and natural gas is used as fuel, the gas proportional valve opens and delivers gas into the branch gas pipe 60, and the gas is injected into the burner 20 through the nozzle for combustion.

[0028] The dual-fuel gas appliance described in this application can use liquid fuel or natural gas as fuel, and is applicable to the usage environments in both cities and villages. It can quickly provide sufficient hot water for users in cities and villages. Without changing the burner 20 in the gas appliance, only a heating element 50 and a fuel pump 40 need to be added to the gas appliance.

[0029] Those skilled in the art should know that a blower and a heat exchanger are also provided in the housing 10. The connection structure and working principle of the blower and the heat exchanger belong to the prior art in this field, and this embodiment will not describe them in detail.

[0030] The liquid fuel can be liquid fuels such as methanol, kerosene, light oil, lubricating oil, and biomass oil. This application does not specifically limit the specific types of liquid fuel, as long as it can be vaporized under the heating of the heating element 50 and then injected into the burner 20 through the nozzle for combustion.

[0031] Preferably, it further includes a heating element 30. The heating element 30 is installed on the branch gas pipe 60 and is used to heat the branch gas pipe 60. The heating element 70 includes a heat conductor and a heating tube 31 embedded in the heat conductor. The heating tube 31 generates heat and heats the branch gas pipe 60 through the heat conductor.

[0032] Refer to the appendix Figures 3-4 As shown in the structural schematic diagram of the branch gas pipe 60, after the gas appliance is used, the liquid fuel will condense and remain in the branch gas pipe 60. The heating element 30 heats the branch gas pipe 60 so that the residual liquid fuel in the branch gas pipe 60 is reheated and vaporized. At the same time, the temperature of the branch gas pipe 60 is increased, avoiding the problem that the liquid fuel cools down after entering the branch gas pipe 60 and causes incomplete vaporization, which is beneficial to ensuring the combustion efficiency.

[0033] Preferably, an exhaust valve 41 is provided on the fuel pump 40. Before the liquid fuel enters the fuel pump 40, there is residual air in the fuel pump 40. At this time, the exhaust valve 41 is opened to discharge the air in the pipe and then the exhaust valve 41 is closed, reducing the time for the liquid fuel to enter the burner 20. Refer to the appendix Figure 2 As shown, the exhaust valve 41 is a nut, and the nut can be loosened to exhaust.

[0034] The heating element 50 includes a heat conductor and a heating element embedded in the heat conductor. A heating cavity, a liquid inlet communicating with the inside of the heating cavity, and a gasification outlet are provided on the heat conductor. The heating element is electrically connected to the controller of the gas appliance. After the heating element generates heat, it heats the heat conductor. Liquid fuel flows into the heating cavity through the liquid inlet, is gasified, and then is discharged through the gasification outlet.

[0035] A thermostat is provided on the heat conductor. When the heating element heats the heat conductor to a set temperature, the heating element stops working.

[0036] In this embodiment, the heating element 50 is disposed in the combustion chamber and above the burner 20. When the gas appliance is just started, the heating element starts and heats the heat conductor. After the gas appliance operates for a period of time, the heat conductor is also heated in the combustion chamber, and no further electric heating is required, which is beneficial to saving electricity.

[0037] Based on the above content, a mode selection button is provided on the controller of the gas appliance in this application, which can be used to switch between the liquid fuel mode and the gas mode through the mode selection button to meet different needs of users.

[0038] Certainly, the present invention is not limited to the above embodiments. Those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A dual-fuel gas appliance, characterized in that, Comprising a housing (10) and a burner (20), a gas proportional valve, a fuel pump (40) and a heating element (50) disposed within the housing (10), the fuel pump (40) being internally connected to the heating element (50), the heating element (50) and the gas proportional valve being respectively connected to a manifold (60) of the burner (20), the fuel pump (40) being configured to pump liquid fuel to the heating element (50), and the heating element (50) being configured to heat the liquid fuel pumped thereto to vaporize it and then flow into the manifold (60) and be injected into the burner (20) through a nozzle for combustion. It further includes a heating element (30) mounted on the manifold (60) and configured to heat the manifold (60).

2. The dual-fuel gas appliance according to claim 1, characterized in that, It further includes a heating element (30), and an exhaust valve (41) is provided on the fuel pump (40).

3. The dual-fuel gas appliance according to claim 1, characterized in that, The heating element (50) is disposed in a combustion chamber and above the burner (20).

4. The dual-fuel gas appliance according to claim 1, wherein, It further includes a controller and a mode selection button electrically connected to the controller respectively, and the mode selection button is used to switch between a liquid fuel mode and a gas mode.

5. The dual-fuel gas appliance according to claim 1, wherein ​

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