CN208382539U - Gas-fired water heater - Google Patents

Abstract

The utility model discloses a kind of gas-fired water heaters, including heat exchanger and proportioning valve, proportioning valve includes shell, adjustment axis and check valve, the water inlet that shell is equipped with inner cavity and is connected to inner cavity, water outlet and discharge outlet, water outlet is connected to heat exchanger, intake tunnel is equipped between inlet and outlet, adjustment axis is equipped with control valve, drainage channel is equipped between water outlet and discharge outlet, check valve is set in drainage channel, check valve and adjustment axis are setting up and down in inner cavity, when adjustment axis moves in the lumen, opening for intake tunnel is adjusted in control valve, pass and water flow, when adjustment axis, which is moved to, to be contacted with check valve, adjustment axis can open check valve so that drainage channel is opened.Both cistern capable of regulating drainage rate makes water termostat out to proportioning valve in the gas-fired water heater, automatic turning off water function can be realized again, the effect of can also be achieved heat exchanger water-drainage antifreezing, so that the structure of gas-fired water heater is simplified, but also gas-fired water heater control is simple.

Description

Gas-fired water heater

Technical field

The utility model relates to fluid technical field of heating, more particularly, to a kind of gas-fired water heater.

Background technique

Gas-fired water heater such as gas heater and gas-heating water heater etc. are widely used gas appliances, and with People's lives level improve, the requirement to gas-fired water heater also constantly improves.Traditional gas-fired water heater in order to It realizes out water termostat, generally can all be equipped with water proportioning valve.In addition, in order to prevent under cryogenic, water-setting is solid internal disk The case where pipe bursting by freezing, occurs, and generally will do it antifreeze processing.Antifreeze processing generally has electrical heating method, manual drainage method.Electric heating Method is exactly to be heated with adding thermal resistance to coil pipe.But with electric heating, on the one hand there are security risks, on the other hand expend electricity Energy.Manual drainage method, is mainly opened manually drain valve, and the water in gas-fired water heater is discharged.From the foregoing, it will be observed that in order to realize use Water and draining, gas-fired water heater need to be equipped with proportioning valve and electric heater or drain valve and other some cooperations Component causes gas-fired water heater structure complex, cumbersome, influences user experience.

Utility model content

Technical problem to be solved in the utility model is to provide for a kind of gas-fired water heater, and proportioning valve therein both may be used Water yield adjusting makes water termostat out, and the effect of can realize automatic turning off water function, can also be achieved heat exchanger water-drainage antifreezing, from And the structure of gas-fired water heater is simplified, but also gas-fired water heater control is simple.

Above-mentioned technical problem is solved by the following technical programs:

A kind of gas-fired water heater, including heat exchanger and proportioning valve, the proportioning valve include shell, adjustment axis and unidirectional Valve, the shell are equipped with inner cavity and water inlet in communication with the inner cavity, water outlet and discharge outlet, the water outlet and the heat Exchanger connection, the water outlet are set between the water inlet and the discharge outlet, the water inlet and the water outlet it Between be equipped with intake tunnel, the adjustment axis is equipped with the control valve being located in the intake tunnel, the water outlet and described Drainage channel is equipped between discharge outlet, the check valve is set in the drainage channel, on the check valve and the adjustment axis Under be set in the inner cavity, when the adjustment axis moves in the inner cavity, the water inlet is adjusted in the control valve The open and close and water flow in channel, when the adjustment axis, which is moved to, to be contacted with the check valve, the adjustment axis can be by the list It is opened to valve so that the drainage channel is opened.

The gas-fired water heater, including heat exchanger and proportioning valve.Adjustment axis on proportioning valve therein is moved down upper In dynamic process, the size of intake tunnel is adjusted, to adjust the water flow into heat exchanger, leaving water temperature is made to reach permanent Temperature, it is no longer sometimes hot and sometimes cold.When adjustment axis, which is moved upward to an inlet and outlet, to be separated completely, can completely close into Water.When adjustment axis is moved further up, check valve can be opened, water outlet is connected to discharge outlet.Water outlet can hand over heat Water body in parallel operation is drawn, and is discharged via discharge outlet, and water-drainage antifreezing is carried out, and water route, which freezes, when preventing temperature low destroys gas and hot water Device.Therefore, gas-fired water heater only needs that constant temperature, Guan Shui and water-drainage antifreezing and other effects can be realized using the proportioning valve, The structure for significantly simplifying gas-fired water heater, reduces the production cost, and gas-fired water heater only needs to control to adjust axis i.e. Can, so that gas-fired water heater control is simple.

Above-mentioned technical proposal is further described below:

It in one of the embodiments, further include evacuated tube, one end of the heat exchanger is connected to the evacuated tube, separately One end is connected to the water outlet, and the evacuated tube is sealed far from one end of the heat exchanger.It is normal in gas-fired water heater Under use state, certain pressure is generated under the extruding of water of the gas in heat exchanger in evacuated tube.When being arranged When water is antifreeze, proportioning valve upper water-out mouth and discharge outlet conducting, the pressure of evacuated tube will drive water body via water outlet and draining Mouth outflow.

The evacuated tube is higher than the heat exchanger far from one end of the heat exchanger in one of the embodiments, Water pipe, and the evacuated tube extends vertically upwards out the heat exchanger, so that evacuated tube can effectively provide draining Driving force.

The check valve is set to the top of the discharge outlet in one of the embodiments, and the drainage channel includes position Connection runner between the water outlet and the check valve, the water outlet, the connection runner, the check valve and The discharge outlet is successively docked, and the check valve includes valve seat and spool, and the periphery of the valve seat and the inner cavity are in close contact, The valve seat is equipped with the first pilot hole and the first water hole, and the spool includes baffle and the valve rod on the baffle, institute It states valve rod to be inserted into first pilot hole, when the drainage channel is closed, the baffle closes first water hole； When the drainage channel is opened, the adjustment axis enters first pilot hole and jacks up the valve rod, so that described first Water hole is connected with the connection runner.Said structure design is rationally ingenious, so that adjustment axis can be by list during rising It is opened to valve, and during adjustment axis is mobile, also achieves the effect for adjusting the water flow of drainage channel.

The check valve further includes return springs and the valve set on the top of the valve seat in one of the embodiments, Lid, the periphery of the valve deck and the inner cavity are in close contact, and the valve deck is equipped with the second pilot hole and the second water hole, and described the Two water holes are connected with first water hole, the water outlet, the connection runner, second water hole, described first Water hole and the discharge outlet are successively docked, and the spool further includes the locating rod on the baffle, the locating rod Be located at the two sides up and down of the baffle respectively with the valve rod, the locating rod can in second pilot hole on move down Dynamic, one end of the return springs offsets with the valve deck, and the other end offsets with the baffle.It is moved down in adjustment axis In the process, spool can move down reset, thus by first due to losing upward top power under the driving of return springs Water hole closing, drainage channel is turned off.On the one hand the setting of valve deck provides guiding role for moving up and down for spool, protect Card spool moves in set track, will not deviate, and guarantees that proportioning valve is safe and reliable；It on the other hand is also elasticity Return unit provides supporting point.

The inner cavity is equipped in first between the water inlet and the water outlet in one of the embodiments, The second inner wall between wall and the water outlet and the discharge outlet, the control valve be equipped with for first inner wall The first sealing ring being in close contact, second inner wall are equipped with the second sealing ring for being in close contact with the adjustment axis. First sealing ring is for guaranteeing thoroughly to completely cut off between Guan Shuishi, water outlet and water inlet.On the one hand second sealing ring is used to protect When with water, water body will not flow out card from discharge outlet；On the other hand guarantee in draining, water body can all be discharged from discharge outlet.

First inner wall is equipped with for preventing the control valve from adjusting excessive limit in one of the embodiments, Position portion.

It in one of the embodiments, further include controller, the proportioning valve further includes that the adjustment axis lifting is driven to move Dynamic driving mechanism, the driving mechanism and the controller are electrically connected.Ratio valve events are controlled by controller, so as to Enough realize the effect of gas-fired water heater automatic water, Guan Shui and draining.

It in one of the embodiments, further include flow sensor, the flow sensor is set to the water inlet, institute It states flow sensor and the controller is electrically connected.Flow sensor is used to detect the flow of water inlet, and water flow is believed Breath is transmitted to controller, uses water flow with facilitate real-time monitoring gas-fired water heater.

It in one of the embodiments, further include end cap and sealing cover, the end cap is set to the bottom end of the shell, described End cap is equipped with the threaded hole being threadedly coupled with the adjustment axis.By the cooperation of adjustment axis and end cap, so that rotation adjustment axis is The effect that can reach driving adjustment axis lifting, so that proportioning valve is easy to adjust.The sealing cover is set to the top of the shell, uses In by the housing seal.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of gas-fired water heater described in an embodiment of the present invention；

Fig. 2 is the perspective view of the proportioning valve in Fig. 1；

Fig. 3 is cross-sectional view of the proportioning valve shown in Fig. 2 under just common water state；

Fig. 4 is cross-sectional view of the proportioning valve shown in Fig. 2 in the case where closing water state；

Fig. 5 is cross-sectional view of the proportioning valve shown in Fig. 2 under hull-borne；

Fig. 6 is the cross-sectional view of the check valve in Fig. 5.

Description of symbols:

100, proportioning valve, 110, shell, 111, inner cavity, 112, water inlet, 113, water outlet, 114, discharge outlet, 115, company Passage flow duct, the 116, second sealing ring, 117, limiting section, 120, adjustment axis, 121, control valve, the 122, first sealing ring, 130, Check valve, 131, valve seat, the 1311, first pilot hole, the 1312, first water hole, 132, spool, 1321, baffle, 1322, valve rod, 1323, locating rod, 133, return springs, 134, valve deck, the 1341, second pilot hole, the 1342, second water hole, 140, flow Sensor, 150, end cap, 160, sealing cover, 170, driving mechanism, 200, heat exchanger, 300, controller, 400, evacuated tube.

Specific embodiment

It is below in conjunction with attached drawing and specifically real for the purpose of this utility model, technical solution and advantage is more clearly understood Mode is applied, the utility model is described in further detail.It should be understood that the specific embodiments described herein Only to explain the utility model, the protection scope of the utility model is not limited.

It should be noted that it can be directly anchored to another when element is referred to as " being fixed on " another element On element or another element can also be fixed on by element placed in the middle.When an element be known as " connection " another Element, it can be directly to another element or be also possible to be connected to another yuan by element placed in the middle Part.In addition, unless otherwise indicated, otherwise the descriptions such as the term " first " in specification and " second " are used only for distinguishing specification In various components, element, step etc., without being intended to indicate that various components, element, the logical relation between step or suitable Order relation etc..

Fig. 1 is the structural schematic diagram of gas-fired water heater described in an embodiment of the present invention, and gas-fired water heater can For gas heater or hot gas water heater for heating etc..Wherein, the gas-fired water heater includes proportioning valve 100 and heat exchanger 200.Heat exchanger 200 is for heating water body, and proportioning valve 100 is for controlling 200 water inlet of heat exchanger, water transfer, Guan Shuihe Draining.

Wherein, specifically, as shown in Fig. 2, the proportioning valve 100 includes shell 110, adjustment axis 120 and check valve 130. Incorporated by reference to Fig. 3, the shell 110 is equipped with inner cavity 111 and the water inlet 112 being connected to the inner cavity 111, water outlet 113 and row The mouth of a river 114.The water outlet 113 is connected to the heat exchanger 200.The water inlet 112, the water outlet 113 and described Discharge outlet 114 is set to the side of the shell 110.The water outlet 113 is set to the water inlet 112 and the discharge outlet Between 114.Intake tunnel is equipped between the water inlet 112 and the water outlet 113, and (intake tunnel can refer to shown in Fig. 3 Path S).The adjustment axis 120 is equipped with the control valve 121 being located in the intake tunnel.Incorporated by reference to Fig. 5, the water outlet It is equipped with drainage channel (drainage channel can refer to path P shown in fig. 5) between mouth 113 and the discharge outlet 114, the check valve 130 are set in the drainage channel for controlling the drainage channel open and close.On the check valve 130 and the adjustment axis 120 Under be set in the inner cavity 111.When the adjustment axis 120 moves in the inner cavity 111, the control valve 121 can The size of the water inlet 112 is adjusted to adjust the open and close and water flow of the intake tunnel.When the adjustment axis 120 is mobile To when contacting with the check valve 130, the adjustment axis 120 can open the check valve 130 so that the drainage channel is beaten It opens.

The gas-fired water heater, the adjustment axis 120 in proportioning valve 100 during moving up and down, be adjusted into The size of aquaporin makes leaving water temperature reach constant temperature to adjust into the water flow in heat exchanger 200, will not fluctuate.Such as Shown in Fig. 4, when adjustment axis 120, which is moved upward to a water inlet 112 and water outlet 113, to be separated completely, can completely close into Water.As shown in figure 5, check valve 130 can be opened when adjustment axis 120 is moved further up, by water outlet 113 and discharge outlet 114 connections.Water outlet 113 can draw the water body in heat exchanger, be discharged via discharge outlet 114, carry out water-drainage antifreezing, prevent Water route, which freezes, when temperature is low destroys gas-fired water heater.Therefore, gas-fired water heater is only needed using the proportioning valve 100 It realizes constant temperature, Guan Shui and water-drainage antifreezing and other effects, significantly simplifies the structure of gas-fired water heater, reduce the production cost.

In the present embodiment, the check valve 130 is set to the top of the discharge outlet 114, and the drainage channel includes being located at Connection runner 115 between the water outlet 113 and the check valve 130.The water outlet 113, the connection runner 115, The check valve 130 and the discharge outlet 114 are successively docked.Specifically, incorporated by reference to Fig. 6, the check valve 130 includes valve seat 131 and spool 132.The periphery of the valve seat 131 and the inner cavity 111 are in close contact.The valve seat 131 is equipped with the first pilot hole 1311 and first water hole 1312.The spool 132 includes baffle 1321 and the valve rod 1322 on the baffle 1321.Institute It states baffle 1321 and is used to open or blocks first water hole 1312, the valve rod 1322 is inserted into first pilot hole 1311 It is interior.When the drainage channel is closed, the baffle 1321 closes first water hole 1312；It is beaten in the drainage channel When opening, the adjustment axis 120 jacks up the valve rod 1322 into first pilot hole 1311, so that first water hole 1312 are connected with the runner 115 that is connected to.Said structure design is rationally ingenious, so that adjustment axis 120 can during rising Check valve 130 is opened, and during adjustment axis 120 is mobile, also achieves the effect for adjusting the water flow of drainage channel Fruit.

Further, please continue to refer to Fig. 6, the check valve 130 further includes return springs 133, the Flexible Reset Part 133 can be spring, elastic slice etc..The return springs 133 are for driving the baffle 1321 to be moved downward to and the valve Seat 131 offsets.During adjustment axis 120 moves down, spool 132 can reset bullet due to losing upward top power Reset is moved down under the driving of property part 133, so that the first water hole 1312 be closed, drainage channel is turned off.It needs to illustrate , in other examples, above-mentioned return springs 133 can also be saved, spool 132 can be automatic under gravity It falls.In addition, as shown in figure 4, the stroke A that adjustment axis 120 opens check valve 130 is less than the range B of check valve 130.

Further, please continue to refer to Fig. 6, the check valve 130 further includes the valve deck set on the top of the valve seat 131 134, the periphery of the valve deck 134 and the inner cavity 111 are in close contact.The valve deck 134 is equipped with the second pilot hole 1341 and the Two water holes 1342.Second water hole 1342 is connected with first water hole 1312, the water outlet 113, the company Passage flow duct 115, second water hole 1342, first water hole 1312 and the discharge outlet 114 are successively docked.It is described Baffle 1321 is set between first water hole 1312 and second water hole 1342, is used to open or blocks described first Water hole 1312.The spool 132 further includes the locating rod 1323 on the baffle 1321, the locating rod 1323 and institute State the two sides up and down that valve rod 1322 is located at the baffle 1321 respectively.The spool 132 can be integrally formed part, can also be group Piece installing.The locating rod 1323 can move up and down in second pilot hole 1341.One end of the return springs 133 with The valve deck 134 offsets, and the other end offsets with the baffle 1321.

On the one hand the setting of valve deck 134 provides guiding role for moving up and down for spool 132, guarantee spool 132 both It moves, will not deviate in fixed track, guarantee that proportioning valve 100 is safe and reliable；It on the other hand is also dynamic clamping head and quiet clamping head Supporting point is provided.It should be noted that in other examples, above-mentioned valve deck 134 can also be saved, at this point, the water outlet Mouth 113, the connection runner 115, first water hole 1312 and the discharge outlet 114 are successively docked.

Optionally, in the present embodiment, first water hole 1312 is at least two, at least two first water holes 1312 Interval is set to the periphery of first pilot hole 1311, for guaranteeing the flow of draining.Similarly, second water hole 1342 is At least two, at least two intervals of second water hole 1342 are set to the periphery of second pilot hole 1341.It needs to illustrate , in other examples, the quantity of first water hole 1312 and second water hole 1342 can also be one, The quantity of first water hole 1312 and the second water hole 1342 can be set according to actual needs.

In the present embodiment, as shown in Figures 3 to 5, the inner cavity 111, which is equipped with, is located at the water inlet 112 and the water outlet The second inner wall between the first inner wall and the water outlet 113 and the discharge outlet 114 between mouth 113.The control valve 121 are equipped with the first sealing ring 122 for being in close contact with first inner wall；Second inner wall be equipped with for institute State the second sealing ring 116 of the close contact of adjustment axis 120.First sealing ring 122 is for guaranteeing in Guan Shuishi, 113 He of water outlet Thoroughly completely cut off between water inlet 112.For second sealing ring, 116 one side for guaranteeing when with water, water body will not be from discharge outlet 114 Outflow；On the other hand guarantee in draining, water body can all be discharged from discharge outlet 114.In addition, being additionally provided on first inner wall For preventing the control valve 121 from adjusting excessive limiting section 117.

As shown in Fig. 2, the proportioning valve 100 further includes end cap 150, the end cap 150 is set to the bottom of the shell 110 End, the end cap 150 are equipped with the threaded hole being threadedly coupled with the adjustment axis 120.Pass through matching for adjustment axis 120 and end cap 150 It closes, so that rotation adjustment axis 120 is the effect that can reach driving adjustment axis 120 and go up and down, so that proportioning valve 100 is easy to adjust.Institute Stating proportioning valve 100 further includes driving mechanism 170, and the driving mechanism 170 is connect with the adjustment axis 120, the driving mechanism 170 can be stepper motor.The proportioning valve 100 further includes sealing cover 160, and the sealing cover 160 is set to the top of the shell 110 End, for sealing the shell 110.

In the present embodiment, the proportioning valve 100 further includes flow sensor 140, and the flow sensor 140 is set to institute It states at water inlet 112.Flow sensor 140 is used to detect the flow of water inlet 112, the water transmitted by flow sensor 140 Flow information carrys out real-time monitoring water flow.

The gas-fired water heater further includes controller 300, the driving mechanism 170 and the flow sensor 140 It is electrically connected with the controller 300, electric connection can be wired connection or wireless connection.Ratio is controlled by controller 300 Example valve 100 acts, so as to realize gas-fired water heater automatic water, automatic turning off water and self-draining effect.It needs Bright, the utility model can also save above-mentioned controller 300 according to actual needs, and it is dynamic that direct labor controls stepper motor Make.

The gas-fired water heater further includes evacuated tube 400, one end of the heat exchanger 200 and the evacuated tube 400 Connection, the other end are connected to the water outlet 113.The evacuated tube 400 is sealed far from one end of the heat exchanger 200.? Under gas-fired water heater normal operating condition, the gas in evacuated tube 400 generates one under the extruding of the water in heat exchanger 200 Fixed pressure.When needing to carry out water-drainage antifreezing, 100 upper water-out mouth 113 of proportioning valve and discharge outlet 114 are connected, evacuated tube 400 Pressure will drive water body to flow out via water outlet 113 and discharge outlet 114.

Further, the evacuated tube 400 is higher than the heat exchanger 200 far from one end of the heat exchanger 200 Water pipe, and the evacuated tube 400 extends vertically upwards out the heat exchanger 200, so that evacuated tube 400 can be effectively Draining driving force is provided.

Be illustrated below to the course of work of the gas-fired water heater: gas-fired water heater is in general service condition Under, controller 300 controls to adjust the movement of axis 120 to adjust inflow, and cooperation gas quantity carries out automatic constant-temperature (Fig. 3)；Regulating valve Door 121 is adjusted up reduction water, then to up-regulation, control valve 121 separates water inlet 112 and water outlet 113, completely closes It intakes (Fig. 4), can be used for automatic turning off water after bathtub discharges water to setting water, preventing from discharging water always leads to water resource waste and immersion House, and reduce the risk of leak.If pressing the start button of " a key row water ", controller 300 issues order, control valve 121 adjust further up；Or controller 300 receives and directly issues order after ambient temperature information, control valve 121 again to Up-regulation.While control valve 121 separates water inlet 112 and water outlet 113, adjustment axis 120 opens check valve 130, will go out The mouth of a river 113 is connected to discharge outlet 114.At this point, the water body pressure in heat exchanger 200 can be blown under the pressure of evacuated tube 400 Out, water-drainage antifreezing (Fig. 5) is carried out.

Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance Shield all should be considered as described in this specification.

Above embodiments only express the several embodiments of the utility model, and the description thereof is more specific and detailed, but simultaneously The limitation to utility model patent range therefore cannot be interpreted as.It should be pointed out that for the ordinary skill people of this field For member, without departing from the concept of the premise utility, various modifications and improvements can be made, these belong to this reality With novel protection scope.

Claims (10)

1. a kind of gas-fired water heater, which is characterized in that including heat exchanger (200) and proportioning valve (100), the proportioning valve (100) include shell (110), adjustment axis (120) and check valve (130), the shell (110) be equipped with inner cavity (111) and with institute State water inlet (112), water outlet (113) and the discharge outlet (114) of inner cavity (111) connection, the water outlet (113) and the heat Exchanger (200) connection, the water outlet (113) is set between the water inlet (112) and the discharge outlet (114), described Be equipped with intake tunnel between water inlet (112) and the water outlet (113), the adjustment axis (120) be equipped be located at it is described into Control valve (121) in aquaporin is equipped with drainage channel between the water outlet (113) and the discharge outlet (114), described Check valve (130) is set in the drainage channel, and the check valve (130) and the adjustment axis (120) are setting up and down in described In inner cavity (111), when the adjustment axis (120) moves in the inner cavity (111), the control valve (121) is adjustable The open and close and water flow of the intake tunnel, when the adjustment axis (120), which is moved to, to be contacted with the check valve (130), institute The check valve (130) can be opened so that the drainage channel is opened by stating adjustment axis (120).

2. gas-fired water heater according to claim 1, which is characterized in that further include evacuated tube (400), the heat exchange One end of device (200) is connected to the evacuated tube (400), and the other end is connected to the water outlet (113), the evacuated tube (400) one end far from the heat exchanger (200) seals.

3. gas-fired water heater according to claim 2, which is characterized in that the evacuated tube (400) is handed over far from the heat One end of parallel operation (200) is higher than the water pipe of the heat exchanger (200), and the evacuated tube (400) extends vertically upwards out institute State heat exchanger (200).

4. gas-fired water heater according to claim 1, which is characterized in that the check valve (130) is set to the draining The top of mouth (114), the drainage channel includes the connection between the water outlet (113) and the check valve (130) Runner (115), the water outlet (113), the connection runner (115), the check valve (130) and the discharge outlet (114) it successively docks, the check valve (130) includes valve seat (131) and spool (132), the periphery of the valve seat (131) and institute Inner cavity (111) close contact is stated, the valve seat (131) is equipped with the first pilot hole (1311) and the first water hole (1312), described Spool (132) includes baffle (1321) and the valve rod (1322) on the baffle (1321), valve rod (1322) insertion In first pilot hole (1311), when the drainage channel is closed, the baffle (1321) is by first water hole (1312) it closes；When the drainage channel is opened, the adjustment axis (120) enters first pilot hole (1311) will be described Valve rod (1322) jacks up, so that first water hole (1312) is connected to runner (115) conducting with described.

5. gas-fired water heater according to claim 4, which is characterized in that the check valve (130) further includes resetting bullet Property part (133) and be set to the valve seat (131) top valve deck (134), the periphery of the valve deck (134) and the inner cavity (111) it is in close contact, the valve deck (134) is equipped with the second pilot hole (1341) and the second water hole (1342), second mistake Water hole (1342) and first water hole (1312) are connected, the water outlet (113), the connection runner (115), described the Two water holes (1342), first water hole (1312) and the discharge outlet (114) are successively docked, the spool (132) It further include the locating rod (1323) on the baffle (1321), the locating rod (1323) and the valve rod (1322) are respectively The two sides up and down of the baffle (1321) are located at, the locating rod (1323) can be in second pilot hole (1341) up and down Mobile, one end and the valve deck (134) of the return springs (133) offset, and the other end offsets with the baffle (1321).

6. gas-fired water heater according to claim 1, which is characterized in that the inner cavity (111) be equipped be located at it is described into The first inner wall and the water outlet (113) between the mouth of a river (112) and the water outlet (113) and the discharge outlet (114) it Between the second inner wall, the control valve (121) is equipped with the first sealing ring for being in close contact with first inner wall (122), second inner wall is equipped with the second sealing ring (116) for being in close contact with the adjustment axis (120).

7. gas-fired water heater according to claim 6, which is characterized in that first inner wall is equipped with for preventing It states control valve (121) and adjusts excessive limiting section (117).

8. gas-fired water heater according to claim 1, which is characterized in that further include controller (300), the proportioning valve (100) further include the driving mechanism (170) for driving the adjustment axis (120) lifting moving, the driving mechanism (170) with it is described Controller (300) is electrically connected.

9. gas-fired water heater according to claim 8, which is characterized in that the proportioning valve (100) further includes that flow passes Sensor (140), the flow sensor (140) be set to the water inlet (112) at, the flow sensor (140) with it is described Controller (300) is electrically connected.

10. gas-fired water heater according to any one of claim 1 to 8, which is characterized in that the proportioning valve (100) It further include end cap (150) and sealing cover (160), the end cap (150) is set to the bottom end of the shell (110), the end cap (150) it is equipped with the threaded hole being threadedly coupled with the adjustment axis (120), the sealing cover (160) is set to the shell (110) Top.