Water flow pressure maintaining starting device of gas water heater and portable gas water heater with water flow pressure maintaining starting device

Abstract

The utility model relates to the technical field of waterway accessories, and provides a gas water heater water flow pressure-maintaining starting device and a portable gas water heater thereof.The gas water heater water flow pressure-maintaining starting device comprises a pressure-maintaining starting device body used for being connected with a waterway and a water passing piece arranged on the pressure-maintaining starting device body; the pressure maintaining starting device body is provided with an input end and an output end, the water passing piece is communicated with the input end and the output end of the pressure maintaining starting device body, and the water passing piece is a flexible body so that the water passing piece can expand along with increase of water pressure and contract along with reduction of the water pressure. A deformed water passing piece is arranged on the pressure maintaining starting device body, a water pump is arranged at one end of the water path, the water flow pressure maintaining starting device is arranged between the water pump and the water outlet control valve, when the water outlet control valve is closed and the water pump continues to pump water to the water passing piece, the water passing piece of the flexible body expands and deforms due to the fact that the water outlet control valve is closed, and when the water outlet control valve is opened again, the water passing piece is closed. And the water passing piece of the flexible body releases pressure to push liquid to flow to the water outlet control valve, so that a section of water flow is conveyed to the water outlet end of the water path.

Description

TECHNICAL FIELD

[0001] The utility model relates to waterway accessory technical field, concretely relates to a kind of gas water heater water pressure maintaining starting device and its portable gas water heater. BACKGROUND

[0002] The existing portable water heater needs to be powered by battery, which has a burner, a heat exchanger, a shower, a water storage tank and a water pump. The water pump operates to draw the liquid in the water storage tank to the heat exchanger. The burner heats the heat exchanger, so that the liquid flowing through the heat exchanger becomes hot water. When the shower is opened, the user can take a bath. When the shower is closed, the water pump stops operating. When the shower is opened again, the water pump cannot automatically start. The user needs to operate the switch again to trigger the water pump to start. The water pump will only operate after the operation. It is troublesome. The existing portable water heater cannot realize automatic water pumping function like household water, because the water inlet end of the water pump of the portable water heater is connected to the water storage tank, not to the water pipe. When the shower is opened again, the water storage tank cannot actively deliver water if the user does not operate the switch to trigger the water pump to start. This results in no water flow, and the water flow sensor of the portable water heater has no signal, so the water pump cannot obtain a start command. SUMMARY

[0003] The utility model provides a kind of gas water heater water pressure maintaining starting device, and the water pressure maintaining starting device main body is equipped with the water passage of the liquid pressure and deformation, water route one end is equipped with water pump, water pressure maintaining starting device is set between water pump and outlet control valve, water route other end is equipped with outlet control valve, when outlet control valve is closed, and water pump continues to pump water to water passage, because outlet control valve is closed, water cannot flow out and be stored in the water passage of flexible body, make the water passage of flexible body swell and deform, water passage keeps corresponding water pressure, when outlet control valve is opened again, the water passage of flexible body releases pressure, pushes liquid to outlet control valve, to realize to the water route outlet end direction delivery a section of water flow.

[0004] A gas water heater water pressure maintaining starting device designed for this purpose, the water pressure maintaining starting device main body is equipped with the water passage of the liquid pressure and deformation, water route one end is equipped with water pump, water pressure maintaining starting device is set between water pump and outlet control valve, water route other end is equipped with outlet control valve, when outlet control valve is closed, and water pump continues to pump water to water passage, because outlet control valve is closed, water cannot flow out and be stored in the water passage of flexible body, make the water passage of flexible body swell and deform, water passage keeps corresponding water pressure, when outlet control valve is opened again, the water passage of flexible body releases pressure, pushes liquid to outlet control valve, to realize to the water route outlet end direction delivery a section of water flow.

[0005] A gas water heater pressure-maintaining starting device designed for this purpose includes a pressure-maintaining starting device body for connecting to a water circuit and a water-conducting component disposed on the pressure-maintaining starting device body. The pressure-maintaining starting device body is provided with an input end and an output end. The water-conducting component is connected to the input end and the output end of the pressure-maintaining starting device body respectively. The water-conducting component is a flexible body so that it expands with the increase of water pressure and contracts with the decrease of water pressure.

[0006] The water-conducting component is a flexible water pipe, and the material of the water-conducting component is rubber, plastic or latex.

[0007] The water-passing component is provided with a support component to prevent the water-passing component from twisting due to repeated expansion and deformation. The support component is provided with a first cavity and a water passage hole that communicate with the inner cavity of the water-passing component. The first cavity extends through the support component from top to bottom to prevent blockage after the water-passing component expands. The water passage hole is located on the side of the support component and communicates with the first cavity.

[0008] The main body of the pressure-holding start device is equipped with a one-way valve for allowing liquid to flow unidirectionally from the input end to the output end.

[0009] The main body also includes a shell, on which a second cavity is provided for installing a water-conducting component, and a gap is left between the inner side of the second cavity of the shell and the outer side of the water-conducting component to allow the water-conducting component to expand and deform.

[0010] The outer shell surface is provided with a vent hole that connects the second cavity with the outside air. When the water passage component is deformed, the second cavity of the outer shell maintains the internal and external air pressure balance through the vent hole.

[0011] Both ends of the outer shell are provided with sealing positioning grooves, and the end of the water-conducting component is provided with a sealing flange that is limited on the sealing positioning groove, so that the water-conducting component is positioned and installed on the outer shell.

[0012] The outer shell has a first connector at one end, which is sleeved on the outer side of the outer end of the outer shell. The first connector has a water outlet channel forming an output end. One end of the water inlet is sealed and flanged against the inner side of the first connector, so that the outer shell, the water inlet and the first connector form a first sealed connection.

[0013] The other end of the outer shell is provided with a second connector, which is sleeved on the outer side of the end of the outer shell. The second connector is provided with a water inlet channel forming an input end. The other end of the water-conducting component is sealed and flanged against the inner side of the second connector, so that a second sealed connection is formed between the outer shell, the water-conducting component and the second connector.

[0014] The second connector has a mounting cavity for installing the second check valve.

[0015] The outer casing includes a first casing and a second casing, both of which are provided with connecting parts for connecting inlet and outlet water connectors.

[0016] A positioning connection part is provided between the first housing and the second housing. The first housing and the second housing are connected and assembled into an outer shell for encapsulating the water passage component through the positioning connection part.

[0017] The pressure-holding start device is mounted on the inlet pipe of the portable gas water heater.

[0018] A portable gas water heater includes a water heater main unit with a water circuit structure and the aforementioned water flow pressure maintaining and starting device, wherein the water flow pressure maintaining and starting device is connected to the water circuit structure of the water heater main unit.

[0019] The water passage structure is equipped with a water flow sensor, which is positioned in the direction of water outlet of the water passage component and connected to the output end.

[0020] The water passage structure is equipped with a water pump for transporting liquid from the water storage tank to the water passage component, which is located between the water flow sensor and the water pump.

[0021] The water circuit structure also includes a shower head connected to the heat exchanger. When the shower head is closed and the water pump continues to deliver liquid from the storage tank to the water inlet, the water inlet is in an expanded, water-storing, and pressure-maintaining state. When the shower head is opened again, the water inlet releases to push the liquid to the water flow sensor, thereby triggering the water flow sensor.

[0022] A method for controlling the use of a portable gas water heater as described above includes the following steps:

[0023] Step 1: Operate the start switch of the water heater main unit. The water pump starts for the first time, the shower head turns on for the first time, and the liquid in the storage tank enters the water passage and flows through the water flow sensor.

[0024] Step 2: When the shower head is turned off, the water flow sensor does not detect a water flow signal, the water pump shuts off after a delay relative to the shower head, and the liquid in the water tank is drawn into the water inlet, which is in an expansion and pressure-maintaining state.

[0025] Step 3: When the shower head is turned on for the second time, the water inlet releases pressure and pushes the liquid flow to the water flow sensor, which triggers the water flow sensor to output an electrical signal to start the water pump, thus enabling the water pump to start automatically without manual operation.

[0026] In step one, the water flow sensor detects the water flow signal and feeds it back to the main control program. The gas valve opens and supplies gas to the burner. The ignition needle ignites the gas. Within a certain time period, the ignition needle thermocouple detects the flame, and the water heater unit operates normally.

[0027] In step two, when the shower head is turned off and the water flow sensor does not detect a water flow signal, the gas valve is closed.

[0028] The beneficial technical effects of this utility model are as follows:

[0029] The main body of the pressure-holding starting device is equipped with a water-passing component that deforms with the liquid pressure. A water pump is installed at one end of the water circuit. The water flow pressure-holding starting device is located between the water pump and the outlet control valve. An outlet control valve is installed at the other end of the water circuit. When the outlet control valve is closed, but the water pump continues to pump water to the water-passing component, the water cannot flow out due to the closed outlet control valve and is stored on the flexible water-passing component, causing the flexible water-passing component to expand and deform. When the outlet control valve is opened again, the flexible water-passing component releases the pressure and pushes the liquid to the outlet control valve, so as to realize the delivery of a section of water to the outlet end of the water circuit.

[0030] Applying the aforementioned water flow pressure-maintaining start device to a portable water heater allows the user to automatically pump water without manually operating the pump switch when the showerhead is turned on again, even when the water pump is off. The user only needs to operate the pump switch on the first use, making it convenient. The water-conducting component expands and deforms when the showerhead is turned off for the first time. Since the pump runs for a certain period (which can be understood as a delayed shutdown relative to the showerhead), it actively delivers liquid to the water-conducting component before shutting off. Because the showerhead cannot dispense water, and the inlet of the water-conducting component, which acts as a one-way valve, also cannot dispense water, the water is stored in the component, causing it to expand and deform. When the showerhead is turned on again, the pressure in the component is released, pushing the liquid towards the water flow sensor, thus triggering the sensor. Attached Figure Description

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] Figure 1 This is a schematic diagram of the structure of a water flow pressure maintaining and starting device installed in a water circuit according to an embodiment of the present invention.

[0033] Figure 2 This is a schematic diagram of the water-passing component under normal pressure according to an embodiment of the present invention.

[0034] Figure 3 This is a schematic diagram of the structure of the water flow pressure maintaining and starting device according to an embodiment of the present invention, in which the liquid is stored in the water passage component when the water outlet is closed.

[0035] Figure 4 This is a schematic diagram of the structure of a water-passing component in an expanded state according to an embodiment of the present invention.

[0036] Figure 5 This is a schematic diagram of the assembly and disassembly structure of a water flow pressure-maintaining start-up device according to an embodiment of the present invention.

[0037] Figure 6 This is a three-dimensional structural diagram of a water flow pressure-maintaining start-up device according to an embodiment of the present invention.

[0038] Figure 7 This is a three-dimensional structural diagram of a portable gas water heater according to an embodiment of the present invention.

[0039] Figure 8 This is a schematic diagram of the operation process of a portable gas water heater according to an embodiment of the present invention. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0041] See Figures 1-6 A pressure-maintaining starting device for a gas water heater includes a pressure-maintaining starting device body 1 for connecting to a water circuit and a water-conducting component 4 disposed on the pressure-maintaining starting device body 1. The pressure-maintaining starting device body 1 is provided with an input end 2 and an output end 3. The water-conducting component 4 is connected to the input end 2 and the output end 3 of the pressure-maintaining starting device body 1 respectively. The water-conducting component 4 is a flexible body so that it expands with the increase of water pressure and contracts with the decrease of water pressure.

[0042] The main body 1 of the pressure-holding start device is equipped with a water-passing component 4 that deforms with the liquid pressure. A water pump 22 is provided at one end of the water circuit. The water flow pressure-holding start device is located between the water pump 22 and the outlet control valve. An outlet control valve is provided at the other end of the water circuit. When the outlet control valve is closed, and the water pump 22 continues to pump water to the water-passing component 4, the water cannot flow out and is stored on the flexible water-passing component 4 because the outlet control valve is closed. This causes the flexible water-passing component 4 to expand and deform. When the outlet control valve is opened again, the flexible water-passing component 4 releases pressure and pushes the liquid to the outlet control valve, so as to realize the delivery of a section of water flow towards the outlet end of the water circuit.

[0043] The water-conducting component 4 is a flexible water pipe, and the material of the water-conducting component 4 is rubber, plastic or latex.

[0044] The water-passing component 4 is provided with a support component 25 to prevent the water-passing component 4 from twisting due to repeated expansion and deformation. The support component 25 is provided with a first cavity 26 and a water passage hole 27 that communicate with the inner cavity of the water-passing component 4. The first cavity 26 extends vertically through the support component 25 to prevent the water-passing component 4 from becoming blocked after expansion. The water passage hole 27 is located on the side of the support component 25 and communicates with the first cavity 26.

[0045] In this embodiment, the support member 25 is inserted into the water passage member 4. When the water passage member 4 expands, the liquid can still be conveyed forward through the first cavity 26 of the support member 25, preventing the water passage member 4 from becoming blocked after expansion.

[0046] The main body 1 of the pressure holding and starting device is equipped with a one-way valve 12 for allowing liquid to flow unidirectionally from the input end 2 to the output end 3.

[0047] In this embodiment, the one-way valve 12 is provided with a conical water passage, and two elastically deformable blocks are provided on the water passage. The inner diameter of the water passage gradually decreases from the water inlet end to the water outlet end. The liquid can only flow in one direction and cannot flow back. When the liquid flows from the water inlet end to the water outlet end, the liquid expands the two elastically deformable blocks. When the liquid wants to flow back, the two elastic blocks are relatively closed, and the second one-way valve 12 does not open, so the liquid cannot flow back.

[0048] Alternatively, the one-way valve 12 is equipped with a flexible piston. When water flows through, the water pushes open the piston, and when the liquid flows back, it is blocked by the flexible piston, thus achieving one-way flow of the liquid. This allows the water-passing component 4 to maintain the corresponding water pressure through expansion and deformation when in a water-storage state.

[0049] The main body 1 also includes a shell 7, which has a second cavity 8 for installing the water-conducting component 4. A gap is left between the inner side of the second cavity 8 of the shell 7 and the outer side of the water-conducting component 4 to allow the water-conducting component 4 to expand and deform.

[0050] The outer shell 7 has a vent 9 on its surface that connects the second cavity 8 with the outside air. When the water-conducting component 4 is deformed, the second cavity 8 of the outer shell 7 maintains the internal and external air pressure balance through the vent 9.

[0051] In this embodiment, the water-passing component 4 has an expansion and water-passing state and a water-passing state. When the water-passing component 4 is in the expansion and water-passing state, the water-passing component 4 releases pressure when the water outlet is opened, and outside air enters the second cavity 8 through the vent 9, causing the water-passing component 4 to deform and reset, so as to push the liquid stored in the water-passing component 4 to flow to the water flow sensor 5.

[0052] In this embodiment, when the water-passing component 4 changes from the water-passing state to the expansion and water-storage state, the water-passing component 4 expands and forces out the air in the second cavity 8, and the air is output to the outside air through the vent hole 9.

[0053] Both ends of the outer shell 7 are provided with sealing positioning grooves 10, and the end of the water-conducting component 4 is provided with a sealing flange 11 that is limited on the sealing positioning groove 10, so that the water-conducting component 4 is positioned and installed on the outer shell 7.

[0054] The outer shell 7 is provided with a first connector 13 at one end. The first connector 13 is sleeved on the outer side of the end of the outer shell 7. The first connector 13 is provided with a water outlet channel 15 forming an output end 3. The sealing flange 11 of one end of the water-conducting component 4 abuts against the inner side of the first connector 13 so that a first sealing connection is formed between the outer shell 7, the water-conducting component 4 and the first connector 13, so as to avoid liquid leakage between the outer shell 7, the water-conducting component 4 and the first connector 13.

[0055] The other end of the outer shell 7 is provided with a second connector 14. The second connector 14 is sleeved on the outer side of the end of the outer shell 7. The second connector 14 is provided with a water inlet channel 16 forming the input end 2. The sealing flange 11 of the other end of the water-conducting component 4 abuts against the inner side of the second connector 14 so that a second sealing connection is formed between the outer shell 7, the water-conducting component 4 and the second connector 14, so as to avoid liquid leakage between the outer shell 7, the water-conducting component 4 and the second connector 14.

[0056] The second connector 14 has a mounting cavity 20 for installing the second check valve 12.

[0057] The outer casing 7 includes a first casing 17 and a second casing 18, both of which are provided with a connecting part 19 for connecting the inlet and outlet water connectors.

[0058] In this embodiment, both the first housing 17 and the second housing 18 are provided with external threads at their ends, and the first connector 13 and the second connector 14 are provided with internal threads.

[0059] A positioning connection part 21 is provided between the first housing 17 and the second housing 18. The first housing 17 and the second housing 18 are connected and assembled into the outer shell 7 of the encapsulated water-passing component 4 through the positioning connection part 21.

[0060] The main body 1 of the pressure-holding start device is installed on the water inlet pipe of the portable gas water heater 24.

[0061] In this embodiment, the outer shell 7 is composed of two parts that can be joined together, which facilitates the installation of the water-conducting component 4 inside the outer shell 7.

[0062] In this embodiment, the positioning connection part 21 includes a positioning post disposed on the inner edge of the first housing 17 and a positioning hole disposed on the second housing 18, wherein the positioning post is inserted into the positioning hole.

[0063] In this embodiment, the first housing 17 and the second housing 18 have a semi-circular arc structure, and the first housing 17 and the second housing 18 can be fixed by ultrasonic welding.

[0064] In this embodiment, the output terminal 3 is connected to the heat exchanger of the portable water heater, and the input terminal 2 is connected to the liquid outlet of the water pump 22.

[0065] Applying the aforementioned water flow pressure-maintaining start device to the water heater unit 24, even when the water pump 22 is off, when the water heater unit 24 turns on the shower 23 again, the user does not need to manually operate the switch to trigger the water pump 22, achieving the automatic water pumping effect of the water pump 22 in the water heater unit 24. The user only needs to operate the switch to trigger the water pump 22 during the first use, which is convenient for the user. The water passage component 4 will expand and deform when the shower 23 is turned off for the first time. Since the water pump 22 continues to run for a certain period of time (which can be understood as the water pump 22 turning off with a delay relative to the shower 23), the water pump 22 actively delivers liquid to the water passage component 4 before turning off. Since the shower 23 cannot output water, and since the input end 2 of the water passage component 4, which is acted upon by the one-way valve 12, also cannot output water, the water is stored in the water passage component 4, causing the water passage component 4 to expand and deform. After the shower 23 is turned on for the second time, the water passage component 4 releases pressure, pushing the liquid to flow to the water flow sensor 5, thereby triggering the water flow sensor 5.

[0066] The inlet end of the water pump 22 is connected to the water tank 6.

[0067] See Figure 7 A portable gas water heater includes a water heater main unit 24 with a water circuit structure and the aforementioned water flow pressure maintaining and starting device, wherein the water flow pressure maintaining and starting device is connected to the water circuit structure of the water heater main unit 24.

[0068] The water passage structure is equipped with a water flow sensor 5, which is located in the water outlet direction of the water passage component 4 and connected to the output terminal 3.

[0069] The waterway structure is equipped with a water pump 22 for transporting the liquid from the water storage tank 6 to the water passage component 4. The water passage component 4 is located between the water flow sensor 5 and the water pump 22.

[0070] The water circuit structure also includes a shower head 23 connected to the heat exchanger. When the shower head 23 is closed and the water pump 22 continues to deliver the liquid from the water storage tank 6 to the water passage component 4, the water passage component 4 is in an expanded water storage and pressure-maintaining state. When the shower head 23 is opened again, the water passage component 4 releases to push the liquid to the water flow sensor 5, thereby triggering the water flow sensor 5.

[0071] See Figure 8 A method for controlling the use of a portable gas water heater as described above includes the following steps:

[0072] Step 1: Operate the start switch of the water heater main unit 24. The water pump 22 starts for the first time, the shower head 23 is turned on for the first time, and the liquid in the storage tank enters the water passage component 4 and flows through the water flow sensor 5.

[0073] Step 2: When the shower head 23 is turned off, the water flow sensor 5 does not detect a water flow signal, the water pump 22 is turned off with a delay relative to the shower head 23, and the liquid in the water storage tank 6 is drawn into the water passage component 4. The water passage component 4 is in an expansion water storage and pressure holding state.

[0074] Step 3: When the shower head 23 is turned on for the second time, the water supply component 4 releases pressure and pushes the liquid flow to the water flow sensor 5, so as to trigger the water flow sensor 5 to output an electrical signal to start the water pump 22, thereby realizing the operation-free start switch outputting an electrical signal to start the water pump 22.

[0075] In step one, the water flow sensor 5 detects the water flow signal and feeds it back to the main control program. The gas valve opens and supplies gas to the burner. The ignition needle ignites. Within the corresponding time period, the ignition needle thermocouple detects the flame, and the water heater main unit 24 operates normally.

[0076] In step two, when the shower head 23 is turned off and the water flow sensor 5 does not detect a water flow signal, the gas valve is closed.

[0077] The water heater unit 24 includes a burner, a heat exchanger, a shower head 23, a water storage tank 6, and a water pump 22;

[0078] The inlet of the water pump 22 is connected to the water storage tank 6, and the outlet of the water pump 22 is connected to the input end 2 of the main body 1; the output end 3 of the main body 1 is connected to the heat exchanger and the shower head 23 in sequence to form a hot water output pipeline.

[0079] The shut-off time of the water pump 22 is longer than the shut-off time of the shower head 23. The water pump 22 draws liquid from the water tank through the water flow component 4, the water flow sensor 5 and the heat exchanger, and the liquid is heated and finally output from the shower head 23.

[0080] When the shower head 23 is turned off, the water pump 22 is turned off after a delay and continues to draw liquid into the water passage 4, which is in an expanded water storage state. When the shower head 23 is turned on while the water passage 4 is in an expanded water storage state, the water passage 4 releases pressure and pushes the liquid to the water flow sensor 5, thereby triggering the water flow sensor 5 to output an electrical signal to start the water pump 22.

[0081] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A gas water heater pressure-maintaining start-up device, characterized in that: It includes a pressure-holding start device body (1) for connecting to a water circuit and a water-passing component (4) provided on the pressure-holding start device body (1). The pressure-holding start device body (1) is provided with an input end (2) and an output end (3). The water-passing component (4) is connected to the input end (2) and the output end (3) of the pressure-holding start device body (1) respectively. The water-passing component (4) is a flexible body so that the water-passing component (4) expands with the increase of water pressure and contracts with the decrease of water pressure.

2. The water flow pressure-maintaining start-up device according to claim 1, characterized in that: The water-conducting component (4) is a flexible water pipe, and the material of the water-conducting component (4) is rubber, plastic or latex; The water-passing component (4) is provided with a support component (25) to prevent the water-passing component (4) from twisting due to repeated expansion and deformation. The support component (25) is provided with a first cavity (26) and a water passage hole (27) that communicate with the inner cavity of the water-passing component (4). The first cavity (26) passes through the support component (25) vertically to prevent the water-passing component (4) from becoming blocked after expansion. The water passage hole (27) is located on the side of the support component (25) and communicates with the first cavity (26).

3. The water flow pressure-maintaining start-up device according to claim 1, characterized in that: The main body (1) of the pressure holding and starting device is provided with a one-way valve (12) for allowing liquid to flow unidirectionally from the input end (2) to the output end (3).

4. The water flow pressure-maintaining start-up device according to claim 1, characterized in that: The main body (1) also includes a shell (7), on which a second cavity (8) for installing a water-conducting component (4) is provided. A gap is left between the inner side of the second cavity (8) of the shell (7) and the outer side of the water-conducting component (4) to allow the water-conducting component (4) to expand and deform.

5. The water flow pressure-maintaining start-up device according to claim 4, characterized in that: The outer shell (7) has a vent (9) on its surface that connects the second cavity (8) with the outside air. When the water-conducting component (4) is deformed, the second cavity (8) of the outer shell (7) maintains the internal and external air pressure balance through the vent (9). Both ends of the outer shell (7) are provided with sealing positioning grooves (10), and the end of the water-conducting component (4) is provided with a sealing flange (11) that is limited on the sealing positioning groove (10) so that the water-conducting component (4) is positioned and installed on the outer shell (7).

6. The water flow pressure-maintaining start-up device according to claim 4, characterized in that: The outer shell (7) is provided with a first connector (13) at one end. The first connector (13) is sleeved on the outer side of the end of the outer shell (7). The first connector (13) is provided with a water outlet channel (15) forming the output end (3). The sealing flange (11) of one end of the water-conducting component (4) abuts against the inner side of the first connector (13) so that a first sealing connection is formed between the outer shell (7), the water-conducting component (4) and the first connector (13). The outer shell (7) is provided with a second connector (14) at the other end. The second connector (14) is sleeved on the outer side of the end of the outer shell (7). The second connector (14) is provided with a water inlet channel (16) forming an input end (2). The sealing flange (11) at the other end of the water-conducting component (4) abuts against the inner side of the second connector (14) so ​​that a second sealing connection is formed between the outer shell (7), the water-conducting component (4) and the second connector (14). The second connector (14) has a mounting cavity (20) for installing the second check valve (12).

7. The water flow pressure-maintaining start-up device according to claim 4, characterized in that: The outer shell (7) includes a first shell (17) and a second shell (18), and both the first shell (17) and the second shell (18) are provided with connecting parts (19) for connecting inlet and outlet water connectors. A positioning connection part (21) is provided between the first housing (17) and the second housing (18). The first housing (17) and the second housing (18) are connected and assembled into the outer shell (7) of the encapsulated water-passing component (4) through the positioning connection part (21).

8. A portable gas water heater, characterized in that: It includes a water heater main unit (24) with a water circuit structure and a water flow pressure maintaining and starting device as described in any one of claims 1-7, wherein the water flow pressure maintaining and starting device is connected to the water circuit structure of the water heater main unit (24).

9. The portable gas water heater according to claim 8, characterized in that: The waterway structure is equipped with a water flow sensor (5), which is located in the water outlet direction of the water passage component (4) and connected to the output end (3).

10. The portable gas water heater according to claim 9, characterized in that: The waterway structure is equipped with a water pump (22) for conveying the liquid in the water storage tank (6) to the water passage component (4), and the water passage component (4) is located between the water flow sensor (5) and the water pump (22); The water circuit structure also includes a shower head (23) connected to the heat exchanger. When the shower head (23) is closed and the water pump (22) continues to deliver the liquid from the water storage tank (6) to the water passage component (4), the water passage component (4) is in an expansion water storage and pressure holding state. When the shower head (23) is opened again, the water passage component (4) is released to push the liquid to the water flow sensor (5), thereby triggering the water flow sensor (5).

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