Gas appliance

Abstract

The gas appliance comprises a shell, a controller, a draught fan, a combustor, a gas proportional valve and a gas sensing unit, the controller, the draught fan, the combustor, the gas proportional valve and the gas sensing unit are arranged in the shell, the controller is electrically connected with the draught fan, the gas proportional valve and the gas sensing unit, and the gas proportional valve communicates with the combustor through a gas supply pipeline. The gas sensing unit is used for detecting the temperature, the humidity, the pressure and / or the combustible gas concentration of gas in the gas supply pipeline and sending the temperature, the humidity and the pressure and / or the combustible gas concentration to the controller, and the controller adjusts the wind speed according to the gas and the temperature, so that the amount of air participating in the reaction is increased, the air is matched with the gas, and a stable combustion working condition is achieved; the higher the gas humidity is, the higher the possibility of generating condensate water by combustion is, the controller increases the rotating speed of the fan, the possibility of generating the condensate water is reduced, and corrosion is prevented; in addition, the fuel gas sensing unit can also detect the content of methane in the fuel gas, and when the concentration of the combustible gas is lower than a preset range, the rotating speed of the fan is reduced, the air amount is reduced, and combustion out-of-flame is prevented.

Description

Technical Field

[0001] The present application relates to a water heater of a heat generating device, and more particularly to the technical field of gas appliances. Background Art

[0002] Gas appliances are devices that obtain energy by burning gas (artificial gas, liquefied petroleum gas, natural gas, etc.). Therefore, properties such as gas composition, pressure, temperature, and humidity are key indicators that need to be considered for gas appliance combustion. When the gas composition is unstable, the gas supply pressure is uneven, and the temperature and humidity fluctuate, it can cause incomplete gas combustion, affecting the combustion efficiency and combustion conditions of the product, and also affecting the flue gas emissions of the product. Summary of the Invention

[0003] 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 gas appliance that is beneficial to ensuring the combustion efficiency, and the technical solutions adopted include:

[0004] A gas appliance includes a housing, and a controller, a blower, a burner, a gas proportional valve, and a gas sensing unit disposed within the housing. The controller is electrically connected to the blower, the gas proportional valve, and the gas sensing unit respectively.

[0005] The gas proportional valve is communicated with the burner through a gas supply pipeline. The gas sensing unit is configured to detect the temperature, humidity, pressure, and / or combustible gas concentration of the gas in the gas supply pipeline and send it to the controller. The controller is configured to adjust the rotation speed of the blower according to the received temperature, humidity, pressure, and / or combustible gas concentration of the gas.

[0006] In an embodiment of the present utility model, the technical solution adopted to solve its technical problem is: the gas sensing unit includes a pressure sensor, a humidity detection chip, and a thermistor. The pressure sensor includes a housing, a diaphragm, and a PCB board disposed within the housing. An air intake channel is provided between the housing and the diaphragm. The humidity detection chip and the thermistor are both disposed in the air intake channel and electrically connected to the PCB board.

[0007] In an embodiment of the present utility model, the technical solution adopted to solve its technical problem is: the gas sensing unit further includes a combustible gas concentration sensor.

[0008] In an embodiment of the present utility model, the technical solution adopted to solve its technical problem is: the gas appliance is a heating and hot water boiler, a gas water heater, or a gas cooker.

[0009] Advantages of the Present Utility Model:

[0010] When gas is mixed with air and burns, the higher the gas pressure and temperature, the more active the gas molecules. At this time, the controller adjusts the wind speed according to the gas and temperature, thereby increasing the amount of air participating in the reaction to match the gas and achieving a stable combustion condition;

[0011] The greater the gas humidity, the greater the possibility of condensate generation during combustion. The controller increases the fan speed to reduce the possibility of condensate generation and prevent corrosion;

[0012] In addition, the gas sensing unit can also detect the methane content in the gas. When the concentration of combustible gas is lower than the preset range, the fan speed is reduced at this time to reduce the amount of air and prevent the flame from lifting off. Description of the Drawings

[0013] The above and / or additional aspects and advantages of the present utility model will become apparent and be easily understood from the description of the embodiments in conjunction with the following drawings, where:

[0014] Figure 1 It is a schematic structural diagram of the gas appliance described in Embodiment 1;

[0015] Figure 2 It is a schematic structural diagram of the gas sensing unit in Embodiment 1;

[0016] Figure 3 It is a schematic structural diagram of the gas appliance described in Embodiment 2. Detailed Description of the Embodiments

[0017] 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 of 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.

[0018] In the description of the present utility model, the meaning of "a plurality" 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.

[0019] In the description of the present utility model, it should be understood that for 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 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 on the present utility model.

[0020] In the present utility model, unless otherwise clearly defined, terms such as "arranged", "installed", and "connected" shall 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 components or the interaction relationship between two components. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0021] Referring to Figure 1 , Embodiment 1 of the present application is proposed. The gas appliance described in the present application is a heating and hot water furnace, a gas water heater or a gas cooker. The gas appliance in this embodiment takes a gas water heater as an example. The gas appliance described in this embodiment includes a housing 10 and a controller 60, a blower 20, a burner 30, a gas proportional valve 40 and a gas sensing unit 50 arranged inside the housing 10. The controller 60 is electrically connected to the blower 20, the gas proportional valve 40 and the gas sensing unit 50 respectively.

[0022] The gas proportional valve 40 is communicated with the burner 30 through a gas supply pipeline 70. The gas sensing unit 50 is used to detect the temperature, humidity, pressure and / or combustible gas concentration of the gas in the gas supply pipeline 70 and send it to the controller 60. The controller 60 is used to adjust the rotation speed of the blower 20 according to the received temperature, humidity, pressure and / or combustible gas concentration of the gas.

[0023] The gas sensing unit 50 is connected to the main controller 60. When gas and air are mixed and burned to react, the greater the gas pressure and the higher the temperature, the more active the gas molecules. At this time, the controller 60 appropriately increases the wind speed, thereby increasing the amount of air participating in the reaction to match the gas and achieving a stable combustion condition.

[0024] The greater the gas humidity, the greater the possibility of generating condensed water during combustion. The controller 60 increases the rotation speed of the blower 20 to reduce the possibility of generating condensed water and prevent corrosion.

[0025] In addition, the gas sensing unit 50 can also detect the concentration of combustible gas in the gas. When the concentration of combustible gas is low, the rotation speed of the blower 20 is reduced to reduce the amount of air and prevent combustion from lifting off.

[0026] Referring to the appendix Figure 2As shown, there are a pressure sensor 51, a humidity detection chip 52 and a thermistor 53. The pressure sensor 51 includes a housing 511, a diaphragm 512 and a PCB board 513 arranged inside the housing 511. There is an air intake channel between the housing 511 and the diaphragm 512. The humidity detection chip 52 and the thermistor 53 are both arranged in the air intake channel and electrically connected to the PCB board 513. The humidity detection chip 52 is used to detect the humidity of the gas, and the thermistor 53 is used to detect the temperature of the gas. The pressure sensor 51 is used to detect the gas pressure and send it to the PCB board 513. The PCB board 513 is electrically connected to the controller 60 to send the detected gas pressure, temperature and humidity to the controller 60.

[0027] The gas sensing unit 50 further includes a combustible gas concentration sensor, which is used to detect the methane concentration in the gas.

[0028] Embodiment 2

[0029] Refer to the appendix Figure 3 As shown, in Embodiment 2, taking a heating water heater as an example and a gas appliance as a gas water heater, the gas appliance of this embodiment includes a housing 10, and a controller 60, a blower 20, a burner 30, a gas proportional valve 40 and a gas sensing unit 50 arranged inside the housing 10. The controller 60 is electrically connected to the blower 20, the gas proportional valve 40 and the gas sensing unit 50 respectively.

[0030] The gas proportional valve 40 is communicated with the burner 30 through a gas supply pipeline 70. The gas sensing unit 50 is used to detect the temperature, humidity, pressure and / or combustible gas concentration of the gas in the gas supply pipeline 70 and send it to the controller 60. The controller 60 is used to adjust the rotation speed of the blower 20 according to the received temperature, humidity, pressure and / or combustible gas concentration of the gas.

[0031] 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. These equivalent deformations and substitutions are all included in the scope defined by the claims of this application.

Claims

1. A gas appliance, characterized in that, It includes a housing (10), as well as a controller (60), a blower (20), a burner (30), a gas proportional valve (40) and a gas sensing unit (50) arranged inside the housing (10). The controller (60) is electrically connected to the blower (20), the gas proportional valve (40) and the gas sensing unit (50) respectively. The gas proportional valve (40) is communicated with the burner (30) through a gas supply pipeline (70). The gas sensing unit (50) is used to detect the temperature, humidity, pressure and / or combustible gas concentration of the gas in the gas supply pipeline (70) and send it to the controller (60). The controller (60) is used to adjust the rotation speed of the blower (20) according to the received temperature, humidity, pressure and / or combustible gas concentration of the gas.

2. The gas appliance according to claim 1, characterized in that, The gas sensing unit (50) includes a pressure sensor (51), a humidity detection chip (52) and a thermistor (53). The pressure sensor (51) includes a housing (511), as well as a diaphragm (512) and a PCB board (513) arranged inside the housing (511). There is an air inlet channel between the housing (511) and the diaphragm (512). The humidity detection chip (52) and the thermistor (53) are both arranged in the air inlet channel and electrically connected to the PCB board (513).

3. The gas appliance according to claim 1, characterized in that, The gas sensing unit (50) further includes a combustible gas concentration sensor.

4. The gas appliance according to claim 1, characterized in that, The gas appliance is a heating and hot water boiler, a gas water heater or a gas cooker.

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