A portable gas water heater

Abstract

The utility model discloses a portable gas water heater, including box body and set up in the combustor of box body, heat exchanger and the fume collecting cover, this fume collecting cover includes the fume hood body of cover setting at the top of heat exchanger and the two fume hoods of two fume hoods respectively setting at fume hood body both sides, the both sides of fume hood body are all bent down to form two bending parts, and two fume hoods are connected with two bending parts respectively, wherein, the fume collecting cavity is formed in fume hood body, and the smoke outlet is set up on the fume hood. Thus, the flue gas after combustion enters the fume collecting cavity and is not directly discharged, and it needs to be discharged after the bending path, so the flue gas can be fully mixed and possibly secondary combustion in the fume hood body, thereby reducing the concentration of carbon monoxide and nitrogen oxides, in addition, because the both sides of fume hood body are all bent down and set, rainwater and strong wind are difficult to pour into the machine interior through fume hood body, greatly improving the wind resistance, rain resistance and safety of the whole machine.

Description

Technical Field

[0001] This utility model relates to the field of gas water heater technology, specifically to a portable gas water heater. Background Technology

[0002] This section provides only background information related to this application to enable those skilled in the art to understand this application more thoroughly and accurately, and it is not necessarily prior art.

[0003] As living standards improve, more and more people are choosing to travel, explore, or camp. Since these activities often last for a long time, they usually involve situations where hot water is needed, such as showering and washing hands. Therefore, more and more people are carrying outdoor gas water heaters to meet their hot water needs.

[0004] Most outdoor gas water heaters on the market currently use a double-opening fume hood. The flue gas generated by the burner flows upward into the fume hood and is discharged directly from the openings on both sides of the hood. This results in poor smoke collection and insufficient mixing of the flue gas, leading to high concentrations of carbon monoxide and nitrogen oxides in the emitted flue gas. In addition, with a double-opening fume hood, rainwater and strong winds may backflow into the entire unit through the outlets on both sides of the hood, which will have a significant impact on combustion and the operation of the entire unit. Its resistance to wind and rain and its installation performance are also poor. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this utility model provides a portable gas water heater. By adopting a double-sided bent outlet-type smoke collection hood, the flue gas generated by combustion can be fully mixed inside the smoke collection hood before being discharged, thereby effectively reducing the concentration of carbon monoxide and nitrogen oxides in the discharged flue gas. In addition, because the smoke collection hood is bent downwards on both sides, rainwater and strong winds cannot flow back into the whole unit through the smoke collection hood, greatly improving the weather resistance and safety performance of the whole unit.

[0006] The technical solution adopted by this utility model to solve its problem is: A portable gas water heater includes a housing and a burner, a heat exchanger, and a smoke hood disposed within the housing, wherein: The heat exchanger is located on top of the burner, and the smoke hood is located on top of the heat exchanger; The smoke collection hood includes a smoke hood body covering the top of the heat exchanger and two smoke outlet hoods respectively disposed on both sides of the smoke hood body. Both sides of the smoke hood body are bent downward to form two bends respectively, and the two smoke outlet hoods are respectively connected to the two bends. The smoke hood body has a smoke collection chamber inside, and the smoke outlet is provided on the smoke outlet. The smoke entering the smoke collection chamber flows through the bending part and the smoke outlet in sequence, and is discharged from the smoke outlet.

[0007] As an optional implementation, the smoke outlet is located on the side of the smoke hood, and a plurality of smoke exhaust holes are provided on the housing corresponding to the position of the smoke outlet.

[0008] As an optional implementation, the fume hood body and the heat exchanger, as well as the fume hood body and the exhaust hood, are fixed together by screws.

[0009] As an optional implementation, it also includes an air guide assembly disposed in the housing, the air guide assembly including a fan and an air guide shroud, one end of the air guide shroud being connected to the air outlet of the fan, and the other end of the air guide shroud being connected to the interior of the burner.

[0010] As an optional implementation, the housing is also provided with several air inlets, and the air inlet end of the fan is connected to several of the air inlets.

[0011] As an optional implementation, it also includes a gas cylinder and a gas pipe, wherein: The gas cylinder is located outside the housing, and the gas cylinder is provided with a gas supply pipe that extends into the housing; The gas pipe is located inside the housing and is connected to the gas inlet of the burner. The gas pipe is also connected to the gas supply pipe.

[0012] As an optional implementation, it also includes a proportional regulating valve disposed between the gas pipe and the gas supply pipe and connected to both, the proportional regulating valve being used to control the gas output flow rate.

[0013] As an optional implementation, it further includes a gas sectionalizing valve disposed between the gas pipe and the burner inlet end and connected to both, wherein: The gas segment valve includes a valve seat and a solenoid valve disposed on the valve seat. The valve seat has a plurality of gas nozzles. The valve seat has a first gas passage and a second gas passage inside. The first gas passage is connected to a portion of the plurality of gas nozzles, and the second gas passage is connected to another portion of the plurality of gas nozzles. The solenoid valve is used to control the connection or disconnection between the first gas passage and the second gas passage.

[0014] As an optional implementation, it also includes an inlet pipe and an outlet pipe disposed in the housing. The housing is provided with an inlet interface and an outlet interface. The inlet interface is connected to the inlet end of the heat exchanger through the inlet pipe, and the outlet end of the heat exchanger is connected to the outlet interface through the outlet pipe.

[0015] As an optional implementation, it also includes a water proportioning valve disposed between the water outlet pipe and the water outlet interface and connected to both, the water proportioning valve being used to control the water flow rate.

[0016] In summary, the portable gas water heater provided by this utility model has the following beneficial effects: (1) By bending the two sides of the fume hood body downwards, the flue gas generated after combustion enters the smoke collection chamber and is not discharged directly. Instead, it needs to pass through a bend before being discharged, thereby increasing the residence time of the flue gas in the fume hood body. This allows the flue gas to be fully mixed and possibly undergo secondary combustion within the fume hood body before being discharged, thereby reducing the concentration of carbon monoxide and nitrogen oxides in the flue gas. In addition, the downward bending of the two sides of the fume hood body makes it difficult for rainwater and strong winds to flow back into the machine through the fume hood body, greatly improving the overall machine's resistance to wind and rain and its safety performance.

[0017] (2) By setting the air guide component, it can introduce sufficient air into the burner, so that the gas can be fully mixed with the air before combustion, which greatly improves the combustion efficiency; in addition, the air introduced by the air guide component can also drive the flow of flue gas in the smoke hood, making the exhaust more smooth. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the portable gas water heater of this utility model after the side panel of the casing has been hidden. Figure 2 for Figure 1 A structural diagram from another perspective; Figure 3 This is a schematic diagram of the internal structure of the portable gas water heater of this utility model; Figure 4 This is a schematic diagram of the smoke collection hood in the portable gas water heater of this utility model; Figure 5 for Figure 4 A structural diagram from another perspective; Figure 6 This is a schematic diagram of the gas sectional valve in the portable gas water heater of this utility model.

[0019] The meanings of the reference numerals in the attached figures are as follows: 1. Housing; 101. Exhaust vent; 102. Air inlet; 103. Water inlet; 104. Water outlet; 2. Burner; 3. Heat exchanger; 4. Smoke hood; 401. Hood body; 4011. Bending section; 4012. Smoke collection chamber; 402. Exhaust hood; 4021. Smoke outlet; 5. Air guide assembly; 501. Fan; 502. Air guide cover; 6. Gas tank; 601. Gas supply pipe; 7. Gas pipe; 8. Proportional regulating valve; 9. Gas segmentation valve; 901. Valve seat; 9011. Gas nozzle; 9012. Gas connector; 902. Solenoid valve; 10. Water inlet pipe; 11. Water outlet pipe; 12. Water proportional valve; 13. Temperature sensor. Detailed Implementation

[0020] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0021] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0023] See Figure 1-6 This utility model provides a portable gas water heater, including a housing 1 and a burner 2, a heat exchanger 3, and a smoke hood 4 disposed within the housing 1. The heat exchanger 3 is located on top of the burner 2, and the smoke hood 4 is located on top of the heat exchanger 3. The smoke hood 4 includes a smoke hood body 401 covering the top of the heat exchanger 3 and two smoke outlet hoods 402 disposed on both sides of the smoke hood body 401. Both sides of the smoke hood body 401 are bent downward to form two bends 4011, and the two smoke outlet hoods 402 are respectively connected to the two bends 4011. A smoke collection chamber 4012 is formed inside the smoke hood body 401, and a smoke outlet 4021 is provided on the smoke outlet hood 402. Thus, the flue gas entering the smoke collection chamber 4012 flows sequentially through the bends 4011 and the smoke outlet hoods 402, and is discharged from the smoke outlet 4021.

[0024] Based on the above structure, when the water heater is started, the burner 2 operates and heats the heat exchanger 3. The flue gas generated by the combustion of the burner 2 flows upward and then enters the smoke collection chamber 4012 of the fume hood body 401. Because both sides of the fume hood body 401 are bent downward, the flue gas does not exit directly after entering the smoke collection chamber 4012; it needs to pass through a bent path before exiting. This design increases the residence time of the flue gas in the fume hood body 401, allowing the flue gas to be fully mixed and possibly undergo secondary combustion before being discharged. At this time, the discharged flue gas has become flue gas with a more uniform composition and a significantly reduced concentration of carbon monoxide and nitrogen oxides. In addition, the downward bending design of both sides of the fume hood body 401 makes it difficult for rainwater and strong winds to backflow into the machine through the fume hood body 401, greatly improving the overall weather resistance and safety performance of the machine.

[0025] In addition, by addressing the concentration of carbon monoxide and nitrogen oxides in the flue gas, combustion power can be further improved, allowing the water heater to provide more and hotter water faster, thereby enhancing product performance and user experience.

[0026] Preferably, the smoke outlet 4021 is located on the side of the smoke hood 402, and a plurality of smoke exhaust holes 101 are provided on the housing 1 corresponding to the position of the smoke outlet 4021; thereby, the smoke discharged from the smoke outlet 4021 is discharged to the outside of the machine through the plurality of smoke exhaust holes 101.

[0027] In this embodiment, the fume hood body 401 is fixed to the heat exchanger 3 and the fume hood body 401 is fixed to the exhaust hood 402 by screws.

[0028] See Figure 1 The gas water heater also includes an air guide assembly 5 installed inside the housing 1. The air guide assembly 5 includes a fan 501 and an air guide shroud 502. One end of the air guide shroud 502 is connected to the air outlet of the fan 501, and the other end of the air guide shroud 502 is connected to the inside of the burner 2.

[0029] Thus, by setting the air guide component 5, forced air is achieved, and the fan 501 can introduce sufficient air into the burner, so that the gas can be fully mixed with the air before combustion, which greatly improves the combustion efficiency. In addition, the air introduced by the air guide component 5 can also drive the flow of flue gas in the smoke hood 4, making the smoke exhaust smoother, achieving two goals at once.

[0030] In this embodiment, the bottom of the housing 1 is also provided with several air inlets 102, and the air inlet end of the fan 501 is connected to the several air inlets 102. Thus, under the action of the fan 501, external air can enter the interior of the housing 1 through the several air inlets 102, and then enter the air inlet end of the fan 501.

[0031] See Figure 2-3 The portable gas water heater also includes a gas tank 6 and a gas pipe 7. The gas tank 6 is located outside the housing 1 and has a gas supply pipe 601 extending into the housing 1. The gas pipe 7 is located inside the housing 1 and is connected to the gas inlet of the burner 2. The gas pipe 7 is connected to the gas supply pipe 601.

[0032] Therefore, when supplying gas, the gas in the gas tank 6 can be introduced into the gas pipe 7 through the gas supply pipe 601, and the gas in the gas pipe 7 can be introduced into the burner 2 for combustion.

[0033] This includes a proportional regulating valve 8, which is located between the gas pipe 7 and the gas supply pipe 601 and connected to both. This proportional regulating valve 8 is used to control the gas output flow rate. The proportional regulating valve 8 includes a valve seat and a solenoid valve mounted on the valve seat. The positive and negative terminals of the solenoid valve are connected to an electronic control unit, which controls the current supplied to the solenoid valve. When the current is large, the solenoid valve opens wider, the gas passage widens, and more gas is output, resulting in a higher outlet water temperature. Conversely, when the current is small, the solenoid valve opens narrower, the gas passage narrows, less gas is output, and the outlet water temperature decreases.

[0034] Furthermore, the portable gas water heater also includes an inlet pipe 10 and an outlet pipe 11 installed inside the housing 1. The housing 1 is provided with an inlet interface 103 and an outlet interface 104. The inlet interface 103 is connected to the inlet end of the heat exchanger 3 through the inlet pipe 10, and the outlet end of the heat exchanger 3 is connected to the outlet interface 104 through the outlet pipe 11.

[0035] This includes a water proportional valve 12, which is located between the water outlet pipe 11 and the water outlet interface 104 and is connected to both. This water proportional valve 12 is used to control the water flow rate. Therefore, by adding the water proportional valve 12, Therefore, in winter, most portable water heaters on the market do not have a water proportioning valve 12, resulting in the unit failing to reach the user's desired set temperature even at full load when the water temperature is low. This invention addresses this by adding a water proportioning valve 12. When the inlet water temperature is low, the water flow rate can be reduced through the water proportioning valve 12, thereby increasing the outlet water temperature.

[0036] It should be noted that the water proportioning valve 12 of this application can be purchased on the market, and its specific structure and working principle are existing technologies. It is not the focus of this application, so it will not be described in detail here.

[0037] In this embodiment, both the inlet pipe 10 and the outlet pipe 11 are equipped with temperature sensors 13, which are electrically connected to the electronic control unit to realize real-time detection of inlet and outlet water temperatures.

[0038] The temperature sensor 13 can be used in conjunction with the proportional control valve 8. When the outlet water temperature is low, the gas intake is increased through the proportional control valve 8. When the outlet water temperature is high, the gas intake is reduced through the proportional control valve 8, thereby keeping the water temperature constant at a comfortable temperature.

[0039] See Figure 3 and Figure 6 In addition, it also includes a gas sectional valve 9 disposed between the gas pipe 7 and the gas inlet end of the burner 2 and connected to both. The gas sectional valve 9 includes a valve seat 901 and a solenoid valve 902 disposed on the valve seat 901. The valve seat 901 has a plurality of gas nozzles 9011. The valve seat 901 has a first gas passage and a second gas passage inside. The first gas passage is connected to a part of the plurality of gas nozzles 9011, and the second gas passage is connected to another part of the plurality of gas nozzles 9011. The valve seat 901 is also provided with a gas connector 9012 connected to the gas pipe 7 and the first gas passage. The solenoid valve 902 is used to control the connection or disconnection between the first gas passage and the second gas passage.

[0040] Therefore, in summer, the high water temperature results in a poor bathing experience. By setting up a gas segmentation valve 9, when the inlet water temperature is high, the solenoid valve 902 controls the disconnection of the first and second gas channels. At this time, only the first gas channel contains gas, so only a portion of the gas nozzles 9011 can burn, effectively solving the problem of high water temperature in outdoor showers during summer. In winter, when the water temperature is low, the solenoid valve 902 controls the connection between the first and second gas channels. At this time, gas flows through both the first and second gas channels, so all gas nozzles 9011 can burn, effectively solving the problem of low water temperature in outdoor showers during winter.

[0041] Therefore, by adding a gas segmentation valve 9 and controlling the gas nozzle 9011 used, the actual heat load of the whole machine can be adjusted within a large range.

[0042] In summary, the portable gas water heater provided by this utility model has the following beneficial effects: (i) By bending both sides of the fume hood body 401 downwards, the flue gas entering the smoke collection chamber 4012 is not directly discharged but must pass through a bent path before being discharged. This design increases the residence time of the flue gas within the fume hood body 401, allowing the flue gas to be fully mixed and potentially undergo secondary combustion before being discharged. At this point, the discharged flue gas has become flue gas with a more uniform composition and a significantly reduced concentration of carbon monoxide and nitrogen oxides. In addition, the downward bending of both sides of the fume hood body 401 makes it difficult for rainwater and strong winds to backflow into the machine through the fume hood body 401, greatly improving the overall weather resistance and safety performance of the machine.

[0043] (ii) By setting the air guide component 5, forced air is achieved, which can introduce sufficient air into the burner so that the gas can be fully mixed with the air before combustion, greatly improving the combustion efficiency; in addition, the air introduced by the air guide component 5 can also drive the flow of flue gas in the smoke hood 4, making the smoke exhaust smoother, achieving two goals at once.

[0044] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0045] It should be understood that the terms "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0046] Furthermore, in the description of this utility model, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0047] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A portable gas water heater, characterized in that, Includes a housing and a burner, heat exchanger, and smoke hood disposed within the housing, wherein: The heat exchanger is located on top of the burner, and the smoke hood is located on top of the heat exchanger; The smoke collection hood includes a smoke hood body covering the top of the heat exchanger and two smoke outlet hoods respectively disposed on both sides of the smoke hood body. Both sides of the smoke hood body are bent downward to form two bends respectively, and the two smoke outlet hoods are respectively connected to the two bends. The smoke hood body has a smoke collection chamber inside, and the smoke outlet is provided on the smoke outlet. The smoke entering the smoke collection chamber flows through the bending part and the smoke outlet in sequence, and is discharged from the smoke outlet.

2. The portable gas water heater according to claim 1, characterized in that, The smoke outlet is located on the side of the smoke hood, and several smoke exhaust holes are provided on the housing corresponding to the position of the smoke outlet.

3. The portable gas water heater according to claim 1, characterized in that, The fume hood body and the heat exchanger, as well as the fume hood body and the exhaust hood, are all fixed together by screws.

4. The portable gas water heater according to any one of claims 1-3, characterized in that, It also includes an air guide assembly disposed inside the housing, the air guide assembly including a fan and an air guide shroud, one end of the air guide shroud being connected to the air outlet of the fan, and the other end of the air guide shroud being connected to the interior of the burner.

5. The portable gas water heater according to claim 4, characterized in that, The housing is also provided with several air inlets, and the air inlet end of the fan is connected to several of the air inlets.

6. The portable gas water heater according to any one of claims 1-3, characterized in that, It also includes gas cylinders and gas pipes, among which: The gas cylinder is located outside the housing, and the gas cylinder is provided with a gas supply pipe that extends into the housing; The gas pipe is located inside the housing and is connected to the gas inlet of the burner. The gas pipe is also connected to the gas supply pipe.

7. The portable gas water heater according to claim 6, characterized in that, It also includes a proportional regulating valve disposed between the gas pipe and the gas supply pipe and connected to both, the proportional regulating valve being used to control the gas output flow rate.

8. The portable gas water heater according to claim 6, characterized in that, It also includes a gas sectionalizing valve disposed between the gas pipe and the burner inlet end, and connected to both, wherein: The gas segment valve includes a valve seat and a solenoid valve disposed on the valve seat. The valve seat has a plurality of gas nozzles. The valve seat has a first gas passage and a second gas passage inside. The first gas passage is connected to a portion of the plurality of gas nozzles, and the second gas passage is connected to another portion of the plurality of gas nozzles. The solenoid valve is used to control the connection or disconnection between the first gas passage and the second gas passage.

9. The portable gas water heater according to any one of claims 1-3, characterized in that, It also includes an inlet pipe and an outlet pipe installed inside the housing. The housing is provided with an inlet interface and an outlet interface. The inlet interface is connected to the inlet end of the heat exchanger through the inlet pipe, and the outlet end of the heat exchanger is connected to the outlet interface through the outlet pipe.

10. The portable gas water heater according to claim 9, characterized in that, It also includes a water proportioning valve disposed between the water outlet pipe and the water outlet interface and connected to both, the water proportioning valve being used to control the water flow rate.

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