One-way valve and gas water heater system comprising same

Abstract

The utility model provides a one-way valve and a gas water heater system comprising the same. The one-way valve comprises a shell comprising a hot water pipe section, and the hot water pipe section comprises a hot water inlet; comprising a fixed baffle and a movable baffle, the fixed baffle is fixed to the hot water pipe section, the movable baffle can be switched from a first position where the hot water inlet is closed to a second position where the hot water inlet is opened under the action of water pressure, and when the movable baffle is located at the first position, the fixed baffle is attached to the movable baffle; the return mechanism is connected with the fixed baffle and the movable baffle and used for applying a return force to the movable baffle, and the return force enables the movable baffle to return to the first position from the second position. By arranging the restoring mechanism for applying restoring force to the movable baffle, on one hand, the water resistance of the pipeline connected with the hot water inlet is increased, and therefore mistaken starting of the water heater when cold water is independently used is effectively prevented; on the other hand, the return mechanism can reduce the opening degree of the one-way valve or close the one-way valve.

Description

Technical Field

[0001] The utility model relates to the field of water heaters, in particular to a one-way valve and a gas water heater system comprising the one-way valve. Background Art

[0002] For households without a return pipe installed, when installing a gas water heater, the farthest tap in the waterway of the household is found, and the hot water pipe is connected to the cold water pipe under this tap. In order to prevent cold water from flowing back into the hot water pipe when using hot water, a one-way valve is generally installed here. This connection method is effective in some households, but it requires a condition to be met, that is, the water resistance Z1 from the hot water pipe to the last tap must be greater than the water resistance Z2 from the cold water pipe to the last tap. However, in many households, the water resistance Z1 from the hot water pipe to the last tap is smaller than the water resistance Z2 from the cold water pipe to the last tap. In this case, at the last tap, when the user turns on the cold water, part of the water will flow from the cold water circuit, and the other part will flow from the hot water circuit. Even if all the water flows from the hot water circuit, this will cause the water heater to start, and the user will get hot water when he wants to use cold water, which will cause great trouble to the user. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defect in the prior art that the water heater will be started when cold water is used alone, and to provide a one-way valve and a gas water heater system including the one-way valve.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A one-way valve, characterized in that it comprises:

[0006] A shell, the shell comprising a hot water pipe section, the hot water pipe section comprising a hot water inlet;

[0007] a baffle, the baffle comprising a fixed baffle and a movable baffle, the fixed baffle being fixed to the hot water pipe section, the movable baffle being switchable from a first position closing the hot water inlet to a second position opening the hot water inlet under the action of water pressure, and when the movable baffle is located at the first position, the fixed baffle is in contact with the movable baffle;

[0008] A restoring mechanism is connected to the fixed baffle and the movable baffle respectively, and is used to apply a restoring force to the movable baffle to make the movable baffle return from the second position to the first position.

[0009] In the present technical solution, by providing a restoring mechanism that applies a restoring force to the movable baffle, on the one hand, the water resistance of the pipe connected to the hot water inlet is increased, thereby effectively preventing the water heater from starting up accidentally when cold water is used alone; on the other hand, the restoring mechanism can reduce the opening of the one-way valve or close the one-way valve.

[0010] Preferably, the reply mechanism comprises:

[0011] A fixing frame, the fixing frame comprises a first fixing frame and a second fixing frame, the first end of the first fixing frame is pivotally connected to the first end of the second fixing frame, the second end of the first fixing frame is pivotally connected to the movable baffle, and the second end of the second fixing frame is pivotally connected to the fixed baffle;

[0012] A rotating frame, the rotating frame comprising a first rotating frame and a second rotating frame, wherein a first end of the first rotating frame is pivotally connected to a first end of the second rotating frame, a second end of the first rotating frame is pivotally connected to a second end of the first fixed frame, and a second end of the second rotating frame is pivotally connected to a second end of the second fixed frame;

[0013] a first elastic member and a second elastic member, wherein the first end of the first elastic member is connected to the fixed baffle, the second end of the first elastic member is connected to the first rotating frame, the first end of the second elastic member is connected to the movable baffle, and the second end of the second elastic member is connected to the second rotating frame;

[0014] Among them, the torque of the first elastic member on the pivotal connection between the first rotating frame and the first fixed frame is a first torque, the torque of the second elastic member on the pivotal connection between the second rotating frame and the second fixed frame is a second torque, and when the movable baffle is in the first position, the direction of the resultant torque of the first torque and the second torque is consistent with the direction of the first torque.

[0015] In the present technical solution, the return mechanism can rotate smoothly through the mutual pivoting between the various components of the return mechanism and the pivoting between the return mechanism and the movable baffle and the fixed baffle to avoid the situation where the one-way valve cannot be closed after opening; the direction of the first torque is the direction of the torque that returns the movable baffle to the first position. When the movable baffle is in the first position, the direction of the combined torque of the first torque and the second torque is consistent with the direction of the first torque, so that the return mechanism increases the resistance encountered by the movable baffle when it is pushed open.

[0016] Preferably, the first rotating frame and the second rotating frame each include a first portion and a second portion connected to each other, and the second portion is bent toward a pivot point close to the first fixing frame and the second fixing frame.

[0017] In the present technical solution, by bending the second part toward the pivotal joint between the first fixing frame and the second fixing frame, the length of the first fixing frame and the second fixing frame can be shortened, which can not only increase the stability of the overall structure of the one-way valve, but also make the first fixing frame easier to rotate so that the return mechanism can more easily drive the movable baffle to move along a preset path.

[0018] Preferably, the length of the first portion of the first rotating frame is less than or equal to half of the overall length of the first rotating frame; and the second end of the first elastic member is connected to the first portion of the first rotating frame.

[0019] In the present technical solution, by making the length of the first part of the first rotating frame less than or equal to half of the overall length of the first rotating frame, the second end of the first elastic member is connected to the first part of the first rotating frame, so that the torque of the first elastic member on the first rotating frame is larger, which is beneficial to the recovery of the first rotating frame.

[0020] Preferably, the length of the first portion of the second rotating frame is less than or equal to half of the overall length of the second rotating frame; and the second end of the second elastic member is connected to the first portion of the second rotating frame.

[0021] In the present technical solution, by making the length of the first part of the second rotating frame less than or equal to half of the overall length of the second rotating frame; the second end of the second elastic member is connected to the first part of the second rotating frame so that the torque of the second elastic member on the second rotating frame is larger, which is beneficial to the opening of the rotating frame.

[0022] Preferably, the restoring mechanism comprises a first restoring mechanism and a second restoring mechanism, and the first restoring mechanism and the second restoring mechanism are respectively arranged on two opposite sides of the baffle.

[0023] In this technical solution, by respectively arranging the first return mechanism and the second return mechanism on both sides of the baffle, the uniformity of the force applied to the movable baffle can be increased, the balance and stability of the movable baffle can be improved, and the situation in which the opening and closing degrees of the two sides of the movable baffle are inconsistent can be avoided.

[0024] Preferably, the movable baffle includes a front side, the front side is used to block the hot water inlet, and the area of ​​the front side is larger than the area of ​​the hot water inlet.

[0025] In the technical solution, by setting the area of ​​the movable baffle to be larger than the area of ​​the hot water inlet, backflow is prevented from causing the movable baffle to get stuck behind the hot water inlet, resulting in failure of the one-way valve.

[0026] Preferably, the movable baffle further includes a back side arranged relative to the front side, the back side is inclined, and the back side gradually inclines toward the hot water inlet from an end close to the fixed baffle to an end away from the fixed baffle.

[0027] In the present technical solution, by tilting the back side of the movable baffle, the force bearing area of ​​the movable baffle on the cold water inlet side can be increased, further ensuring that the movable baffle can be kept in the first position during static pressure.

[0028] Preferably, the first elastic member and the second elastic member are identical, and when the movable baffle is in the first position, the first elastic member and the second elastic member are parallel to each other, and the orthographic projections of the first elastic member and the second elastic member on the side of the baffle partially overlap.

[0029] In the present technical solution, the first elastic member and the second elastic member are arranged to be the same, that is, the first elastic member and the second elastic member are elastic members with exactly the same specifications, the first elastic member and the second elastic member are arranged to be parallel to each other and the projections of the first elastic member and the second elastic member on the side of the baffle overlap, so that the overall structure is simpler to bear force and easier to control.

[0030] A gas water heater system, characterized in that the gas water heater system includes the one-way valve, gas water heater and water use end as described above, the hot water inlet of the one-way valve is connected to the hot water interface of the gas water heater, and the cold water outlet of the one-way valve is connected to the cold water interface of the water use end.

[0031] In the present technical solution, the hot water inlet of the one-way valve is connected to the hot water interface of the gas water heater, and the cold water outlet of the one-way valve is connected to the cold water interface of the water-using end, so that when the one-way valve is opened, the water in the hot water interface of the gas water heater can enter the water-using end from the one-way valve through the cold water outlet, and when the one-way valve is closed, the water in the hot water interface of the gas water heater cannot enter the water-using end from the one-way valve; because the one-way valve increases the water resistance of the pipeline connected to the hot water inlet, the resistance encountered by the hot water when passing through the one-way valve to reach the water-using end is greater than the resistance encountered by the cold water when reaching the water-using end, thereby avoiding the accidental start-up of the water heater.

[0032] The positive and progressive effects of the utility model are:

[0033] The one-way valve of the utility model increases the water resistance of the pipeline connected to the hot water inlet by providing a restoring mechanism for applying a restoring force to the movable baffle that blocks the hot water inlet. In a gas water heater system using the one-way valve, the resistance of hot water passing through the one-way valve to the water-using end is greater than the resistance of cold water to the water-using end, thereby avoiding the water heater from starting up in error. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of the one-way valve in the closed state of Example 1 of the utility model.

[0035] Figure 2 This is a schematic structural diagram of the one-way valve in the open state of Example 1 of the utility model.

[0036] Figure 3 This is a schematic structural diagram of the one-way valve in the closed state of Example 1 of the utility model.

[0037] Figure 4 For embodiment 1 of the utility model Figure 3 Schematic diagram of the enlarged structure of part A.

[0038] Figure 5 This is a schematic structural diagram of the one-way valve in the open state of Example 1 of the utility model.

[0039] Figure 6 For embodiment 1 of the utility model Figure 5 Schematic diagram of the enlarged structure of part B.

[0040] Figure 7 This is a schematic structural diagram of the first rotating frame of Example 1 of the utility model.

[0041] Figure 8 This is a schematic structural diagram of the second rotating frame of Example 1 of the utility model.

[0042] Fig. 9 This is a schematic diagram of the appearance of the one-way valve of Example 1 of the utility model.

[0043] Fig.10 This is a schematic diagram of the structure of a gas water heater system according to Embodiment 2 of the present utility model.

[0044] Description of reference numerals:

[0045] Shell 1

[0046] Hot water inlet 101

[0047] Cold water inlet 102

[0048] Cold water outlet 103

[0049] Active baffle 2

[0050] Fixed baffle 3

[0051] Reply Agency 4

[0052] First Reply Agency 401

[0053] Second reply agency 402

[0054] First rotating frame 41

[0055] Second rotating frame 42

[0056] Part 14121

[0057] Part II 4122

[0058] The first elastic member 43

[0059] The second elastic member 44

[0060] First fixing frame 5

[0061] Second fixing bracket 6

[0062] Fixed column 7

[0063] Check valve 8

[0064] Gas water heater9

[0065] Water end 10

[0066] Hot water connection 11

[0067] Cold water connection 12 DETAILED DESCRIPTION

[0068] Two preferred embodiments are given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0069] Example 1

[0070] This embodiment provides a one-way valve, such as Figures 1 to 9 As shown, the one-way valve includes a housing 1, a baffle and a return mechanism 4. The housing 1 includes a hot water pipe section, and the hot water pipe section includes a hot water inlet 101; the baffle includes a fixed baffle 3 and a movable baffle 2, the fixed baffle 3 is fixed on the hot water pipe section, and the movable baffle 2 can be switched from a first position of closing the hot water inlet 101 to a second position of opening the hot water inlet 101 under the action of water pressure. When the movable baffle 2 is in the first position, the movable baffle is arranged above the fixed baffle, the fixed baffle is in contact with the movable baffle, and the top surface of the fixed baffle 3 supports the bottom surface of the movable baffle 2; the return mechanism 4 is connected to the fixed baffle 3 and the movable baffle 2 respectively, and the return mechanism 4 is used to apply a return force to the movable baffle 2 to return the movable baffle 2 from the second position to the first position.

[0071] By providing a restoring mechanism 4 that applies a restoring force to the movable baffle 2, the water resistance of the pipeline connected to the hot water inlet 101 is increased, so that the water pressure in the direction of the hot water inlet 101 must reach a pressure that is sufficient to push the movable baffle 2 from the first position before the one-way valve can be opened. On the other hand, the restoring mechanism 4 can reduce the opening of the one-way valve or close the one-way valve. In other embodiments, when the movable baffle is in the first position, the movable baffle can also be arranged below the fixed baffle, or in more embodiments, the fixed baffle and the movable baffle can also be arranged in a manner of one on the left and one on the right, as long as when the movable baffle is in the first position, the movable baffle and the fixed baffle fit each other, and the hot water pipe section can be blocked to prevent water from the hot water inlet from flowing through the one-way valve.

[0072] Specifically, the return mechanism 4 includes a first return mechanism 401 and a second return mechanism 402, and the first return mechanism 401 and the second return mechanism 402 are respectively arranged on opposite sides of the baffle, and each return mechanism 4 includes a first fixed frame 5 and a second fixed frame 6, a first rotating frame 41 and a second rotating frame 42, and a first elastic member 43 and a second elastic member 44.

[0073] The first end of the first fixing frame 5 is pivotally connected to the first end of the second fixing frame 6 , the second end of the first fixing frame 5 is pivotally connected to the movable baffle 2 , and the second end of the second fixing frame 6 is pivotally connected to the fixed baffle 3 .

[0074] The first end of the first rotating frame 41 is pivotally connected to the first end of the second rotating frame 42 , the second end of the first rotating frame 41 is pivotally connected to the second end of the first fixing frame 5 , and the second end of the second rotating frame 42 is pivotally connected to the second end of the second fixing frame 6 .

[0075] The first end of the first elastic member 43 is connected to the fixed baffle 3 , the second end of the first elastic member 43 is connected to the first rotating frame 41 , the first end of the second elastic member 44 is connected to the movable baffle 2 , and the second end of the second elastic member 44 is connected to the second rotating frame 42 .

[0076] The connections between all the components in the return mechanism 4 and the connection between the return mechanism 4 and the baffle are all flexible connections. In this embodiment, the connections between the baffle and the fixed frame, between the baffle and the elastic member, between the rotating frame and the fixed frame, and between the rotating frame and the elastic member are all hinged, so that the movable baffle 2 and the return mechanism 4 can rotate, so that the one-way valve can be opened and closed smoothly. Among them, the pivoting end of the first rotating frame 41 has a cylindrical structure for pivoting with the second rotating frame 42, the bending part of the first rotating frame 41 has a cylindrical structure for hinged with the first elastic member 43, and the bending part of the second rotating frame 42 has a cylindrical structure for hinged with the second elastic member 44. The baffle and the elastic member are hinged with a fixed column 7, and the rotating frame and the baffle, the first fixed frame 5 and the second fixed frame 6 are all connected with hinge bolts. In other embodiments, all the components in the return mechanism 4 and the return mechanism 4 and the baffle can be connected with hinge bolts.

[0077] Among them, the torque of the first elastic member 43 on the pivotal joint of the first rotating frame 41 and the first fixed frame 5 is the first torque, the torque of the second elastic member 44 on the pivotal joint of the second rotating frame 42 and the second fixed frame 6 is the second torque, and when the movable baffle 2 is in the first position, the direction of the resultant torque of the first torque and the second torque is consistent with the direction of the first torque, the first elastic member 43 and the second elastic member 44 are parallel to each other, and the orthographic projections of the first elastic member 43 and the second elastic member 44 on the side of the baffle partially overlap.

[0078] The direction of the first torque is the same as the direction of the torque that makes the movable baffle 2 return from the second position to the first position, that is, the closing direction, and the direction of the second torque is the same as the direction of the torque that makes the movable baffle 2 switch from the first position to the second position, that is, the opening direction. In the one-way valve, in the first return mechanism 401 and the second return mechanism 402 arranged on opposite sides of the baffle, the straight line where the pivot point of the first rotating frame 41 and the first fixed frame 5 of the first return mechanism 401 and the pivot point of the first rotating frame 41 and the first fixed frame 5 of the second return mechanism 402 are located is the rotating axis of the movable baffle 2 and the first rotating frame 41; the straight line where the pivot point of the second rotating frame 42 and the second fixed frame 6 of the first return mechanism 401 and the pivot point of the second rotating frame 42 and the first fixed frame 6 of the second return mechanism 402 are located is the rotating axis of the second rotating frame 42. Specifically, the first elastic member 43 generates a first torque in the closing direction on the first rotating frame 41, and the second elastic member 44 generates a second torque in the opening direction on the second rotating frame 42. When the movable baffle 2 is in the first position, the rotating frame is in a closed state, and the movable baffle 2 is subjected to the torque in the closing direction from the second elastic member 44. The movable baffle 2 is in a closed state, and the one-way valve is not easily opened. The process of opening the one-way valve includes: when the front side of the movable baffle 2 for blocking the hot water inlet 101 is subjected to water pressure, the pressure generates a torque in the opening direction on the movable baffle 2, causing the movable baffle 2 to flip downward and generate a displacement in the lower right direction. When the torque in the opening direction is greater than the torque in the closing direction of the movable baffle 2 by the second elastic member 44, the one-way valve is opened. When the one-way valve is fully opened, the movable baffle 2 contacts the shell 1. During the opening process of the one-way valve, the downward flipping angle of the movable baffle 2 continues to increase, the second elastic member 44 stretches to increase the second torque, and drives the rotating frame to rotate in the opening direction, the first rotating frame 41 rotates accordingly, and the first elastic member 43 stretches. The process of closing the one-way valve includes: the pressure of the hot water inlet 101 drops, the torque in the opening direction generated by the pressure on the movable baffle 2 is smaller than the torque in the closing direction generated by the second elastic member 44 on the movable baffle 2, and the movable baffle 2 moves in the closing direction. In the process of switching to the first position, if the torque in the opening direction generated by the water pressure at a certain position on the movable baffle 2 is equal to the torque in the closing direction generated by the second elastic member 44 on the movable baffle 2, the movable baffle 2 stops moving at this position, otherwise the movable baffle 2 returns to the first position; in this process, the second elastic member 44 gradually shortens, the second torque decreases, the rotating frame moves in the closing direction, and the first elastic member 43 shortens. During the rotation of the rotating frame and the movable baffle 2, the state of the fixed frame also changes, the second end of the second fixed frame 6 is connected to the fixed baffle 3, the first end of the first fixed frame 5 and the first end of the second fixed frame 6 are pivotally connected, and the second end of the first fixed frame 5 is connected to the movable baffle 2 to provide a fulcrum for the rotation of the movable baffle 2. The fixed frame rotates in coordination with the movement of the movable baffle 2, ensuring that the movable baffle 2 moves along a preset path, so that the one-way valve can be opened and closed smoothly.

[0079] Furthermore, if Figure 7 and Figure 8 As shown, the first rotating frame 41 and the second rotating frame 42 both include a first portion 4121 and a second portion 4122 connected to each other, and the second portion 4122 is bent toward the pivot point close to the first fixed frame 5 and the second fixed frame 6; the length of the first portion 4121 of the first rotating frame 41 is less than or equal to half of the overall length of the first rotating frame 41, and the second end of the first elastic member 43 is connected to the first portion 4121 of the first rotating frame 41, so that the first elastic member 43 exerts a greater torque on the first rotating frame 41, which is conducive to the first elastic member 43 pulling the first rotating frame 41, so that the rotating frame returns and closes the one-way valve. The length of the first portion 4121 of the second rotating frame 42 is less than or equal to half of the overall length of the second rotating frame 42, and the second end of the second elastic member 44 is connected to the first portion 4121 of the second rotating frame 42, so that the second elastic member 44 exerts a greater torque on the second rotating frame 42, which is conducive to the second elastic member 44 pulling the second rotating frame 42, so that the rotating frame opens and opens the one-way valve. That is to say, the connection position between the elastic member and the rotating frame can be located at any position between the pivot point of the first rotating frame 41 and the second rotating frame 42 and the bending point of the rotating frame, including the pivot point of the first rotating frame 41 and the second rotating frame 42 and the bending point of the rotating frame.

[0080] By bending the second portion 4122 close to the pivot point of the first fixing frame 5 and the second fixing frame 6, the length of the first fixing frame 5 and the second fixing frame 6 can be shortened. On the one hand, the stability of the overall structure of the one-way valve can be increased. On the other hand, the tangential component of the force applied to the second end of the first fixing frame 5 is relatively large, that is, the force acting on the first fixing frame 5 to rotate around the pivot point of the first fixing frame 5 and the second fixing frame 6 is relatively large, which is conducive to the rotation of the first fixing frame 5, so that the return mechanism 4 can more easily drive the movable baffle 2 to move along a preset path. In addition, compared with shortening the length of the first fixing frame 5 and the second fixing frame 6 by reducing the angle formed by the first portion 4121 of the first rotating frame 41 and the first portion 4121 of the second rotating frame 42, by shortening the length of the first fixing frame 5 and the second fixing frame 6 by bending the second portion 4122 of the rotating frame close to the pivot point of the first fixing frame 5 and the second fixing frame 6, the torque of the elastic member on the rotating frame is relatively large, and the rotating frame is easier to rotate.

[0081] In this embodiment, the elastic member is preferably a spring, but is not limited thereto, and may also be other components with elastic restoring force.

[0082] The return mechanism 4 includes a first return mechanism 401 and a second return mechanism 402, and the first return mechanism 401 and the second return mechanism 402 are respectively arranged on opposite sides of the baffle, and the first return mechanism 401 and the second return mechanism 402 are symmetrically arranged, so that the support effect of the fixed frame and the pulling force of the elastic member on the movable baffle 2 during the movement are more uniform, thereby improving the balance and stability of the movable baffle 2 and avoiding the situation where the opening and closing degrees of the two sides of the movable baffle 2 are inconsistent.

[0083] Furthermore, the first elastic member and the second elastic member are identical, and when the movable baffle is in the first position, the first elastic member and the second elastic member are parallel to each other, and the orthographic projections of the first elastic member and the second elastic member on the side of the baffle partially overlap.

[0084] In this embodiment, the first elastic member and the second elastic member are arranged to be the same, that is, the first elastic member and the second elastic member are elastic members with exactly the same specifications, the first elastic member and the second elastic member are arranged to be parallel to each other and the projections of the first elastic member and the second elastic member on the side of the baffle overlap, so that the overall structure is simpler to bear force and is easier to control.

[0085] In other embodiments, the first elastic member and the second elastic member may also be elastic members of different specifications. In this case, the connection positions of the two elastic members and the baffle may be set as required after force analysis.

[0086] In this embodiment, Figure 1 and Figure 2 As shown, the movable baffle 2 includes a front side, which is used to block the hot water inlet 101. The area of ​​the front side is larger than the area of ​​the hot water inlet 101, so as to prevent the backflow from causing the movable baffle 2 to be stuck in the hot water inlet 101 and causing the one-way valve to fail. Furthermore, the movable baffle 2 also includes a back side arranged relative to the front side, and the back side is arranged obliquely. The back side gradually inclines toward the hot water inlet 101 from the end close to the fixed baffle 3 to the end far from the fixed baffle 3, so as to increase the force area of ​​the movable baffle 2 on the cold water inlet 102 side of the one-way valve, and further ensure that the movable baffle 2 can be kept in the first position under static pressure. The movable baffle 2 seals the hot water inlet 101, and avoids the phenomenon of water flowing from the cold water inlet 102 to the hot water inlet 101 through the hot water inlet 101 to form a backflow.

[0087] Example 2

[0088] A gas water heater system, such as Fig.10As shown, the gas water heater system includes the one-way valve 8, the gas water heater 9 and the water use end 10 of Example 1, the hot water inlet 101 of the one-way valve 8 is connected with the hot water interface 11 of the gas water heater 9, and the cold water outlet 103 of the one-way valve 8 is connected with the cold water interface 12 of the water use end 10. When the one-way valve 8 is opened, the water in the hot water interface 11 of the gas water heater 9 can enter the water use end 10 from the one-way valve 8 through the cold water outlet 103. When the one-way valve 8 is closed, the water in the hot water interface 11 of the gas water heater 9 cannot enter the water use end 10 from the one-way valve 8. Since the one-way valve increases the water resistance of the pipeline connected to the hot water inlet, the resistance encountered by the hot water when passing through the one-way valve to reach the water use end is greater than the resistance encountered by the cold water when reaching the water use end, thereby avoiding the wrong start of the water heater. The one-way valve integrates the circulation one-way valve in the original zero cold water circulation pipeline, is simple to install, and has no adverse effect on the water use situation at the water use end.

[0089] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A one-way valve, characterized in that: It includes: A shell, the shell comprising a hot water pipe section, the hot water pipe section comprising a hot water inlet; a baffle, the baffle comprising a fixed baffle and a movable baffle, the fixed baffle being fixed to the hot water pipe section, the movable baffle being switchable from a first position closing the hot water inlet to a second position opening the hot water inlet under the action of water pressure, and when the movable baffle is located at the first position, the fixed baffle is in contact with the movable baffle; A restoring mechanism is connected to the fixed baffle and the movable baffle respectively, and is used to apply a restoring force to the movable baffle to make the movable baffle return from the second position to the first position.

2. The one-way valve according to claim 1, characterized in that: The response agencies include: A fixing frame, the fixing frame comprises a first fixing frame and a second fixing frame, the first end of the first fixing frame is pivotally connected to the first end of the second fixing frame, the second end of the first fixing frame is pivotally connected to the movable baffle, and the second end of the second fixing frame is pivotally connected to the fixed baffle; A rotating frame, the rotating frame comprising a first rotating frame and a second rotating frame, wherein a first end of the first rotating frame is pivotally connected to a first end of the second rotating frame, a second end of the first rotating frame is pivotally connected to a second end of the first fixed frame, and a second end of the second rotating frame is pivotally connected to a second end of the second fixed frame; a first elastic member and a second elastic member, wherein the first end of the first elastic member is connected to the fixed baffle, the second end of the first elastic member is connected to the first rotating frame, the first end of the second elastic member is connected to the movable baffle, and the second end of the second elastic member is connected to the second rotating frame; Among them, the torque of the first elastic member on the pivotal connection between the first rotating frame and the first fixed frame is a first torque, the torque of the second elastic member on the pivotal connection between the second rotating frame and the second fixed frame is a second torque, and when the movable baffle is in the first position, the direction of the resultant torque of the first torque and the second torque is consistent with the direction of the first torque.

3. The one-way valve according to claim 2, characterized in that: The first rotating frame and the second rotating frame each include a first portion and a second portion connected to each other, and the second portion is bent toward a pivot point close to the first fixing frame and the second fixing frame.

4. The one-way valve according to claim 3, characterized in that: The length of the first part of the first rotating frame is less than or equal to half of the overall length of the first rotating frame; the second end of the first elastic member is connected to the first part of the first rotating frame.

5. The one-way valve according to claim 3, characterized in that: The length of the first part of the second rotating frame is less than or equal to half of the overall length of the second rotating frame; the second end of the second elastic member is connected to the first part of the second rotating frame.

6. The one-way valve according to any one of claims 1 to 5, characterized in that: The restoring mechanism includes a first restoring mechanism and a second restoring mechanism, and the first restoring mechanism and the second restoring mechanism are respectively arranged on two opposite sides of the baffle.

7. The one-way valve according to claim 1, characterized in that: The movable baffle includes a front side, and the front side is used to block the hot water inlet, and the area of ​​the front side is larger than the area of ​​the hot water inlet.

8. The one-way valve according to claim 7, characterized in that: The movable baffle also includes a back side arranged relative to the front side, the back side is inclined, and the back side gradually inclines toward the hot water inlet from an end close to the fixed baffle to an end away from the fixed baffle.

9. The one-way valve according to claim 2, characterized in that: The first elastic member and the second elastic member are identical, and when the movable baffle is in the first position, the first elastic member and the second elastic member are parallel to each other, and the orthographic projections of the first elastic member and the second elastic member on the side of the baffle partially overlap.

10. A gas water heater system, characterized in that: The gas water heater system comprises the one-way valve according to any one of claims 1 to 9, a gas water heater and a water-using end, the hot water inlet of the one-way valve being connected to the hot water interface of the gas water heater, and the cold water outlet of the one-way valve being connected to the cold water interface of the water-using end.

Images