Water inlet connector and gas water heater comprising same

Abstract

The utility model provides a water inlet joint and a gas water heater comprising the same, the water inlet joint comprises a body and a drainage part, the drainage part is arranged on the side wall of the body, and water flow channels are arranged in the body and the drainage part; a first piston is arranged in the body, the first piston is provided with a first rod part, and the first rod part is provided with a groove; a second piston and an elastic piece are arranged in the drainage part, and the elastic piece acts on the second piston; one end of the second piston faces the first rod part, the first piston is configured to move between the water inlet and the water outlet of the body, and the end of the second piston abuts against the side wall of the first rod part or extends into the groove under the action of the elastic piece, so that a water flow channel between the body and the drainage part is closed or opened. According to the water inlet connector, the body and the drainage part are arranged, automatic switching of normal passing of water flow in the body or drainage of residual water from the drainage part is achieved, the first piston and the second piston are matched with each other, the residual water can be drained without manual operation by means of water pressure difference, and the structure is simple.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of household appliances, especially to a water inlet joint and a gas water heater comprising the same. BACKGROUND

[0002] If the water heater is not used for a long time in winter without keeping power on, the anti-freezing device of the water heater cannot be started, and the icing of the waterway system under low temperature conditions will cause the expansion and cracking of some parts of the waterway. If the residual water in the water heater pipeline is discharged, the water pipe can be effectively prevented from cracking.

[0003] At present, the user needs to manually perform the water heater drainage work, and opens the water outlet faucet and the drain plug to drain water after closing the water valve. The user needs to manually operate, and if the user does not operate according to the specification in the instruction manual, the water heater may be damaged, resulting in property loss. UTILITY MODEL CONTENTS

[0004] The utility model wants to solve the technical problem that the user needs to manually perform the water heater drainage work in the prior art, which is inconvenient to operate and easy to damage the water heater. A water inlet joint and a gas water heater comprising the same are provided.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A water inlet joint is provided, which comprises a body and a drainage part. The drainage part is arranged on the side wall of the body, and the body and the drainage part have a water flow channel inside;

[0007] A first piston is arranged in the body, which has a first rod portion provided with a groove. A second piston and an elastic member are arranged in the drainage part, and the elastic member acts on the second piston;

[0008] One end of the second piston faces the first rod portion, and the first piston is configured to move between the water inlet and the water outlet of the body. The end of the second piston is abutted against the side wall of the first rod portion or extends into the groove under the action of the elastic member, so as to close or open the water flow channel between the body and the drainage part.

[0009] In the present scheme, the water inlet joint realizes automatic switching of water flow in the body or residual water discharge from the drain part according to the water pressure difference in the water inlet joint. The first piston is arranged in the body and moves between the water inlet and the water outlet of the body according to the water pressure change in the body, and is used to close or open the water flow channel in the body. The elastic member is used to apply pressure to the second piston, so that the end of the second piston always abuts against the first piston, and with the movement of the first piston, the end of the second piston abuts against the side wall of the first rod part or extends into the groove, and is used to close or open the water flow channel in the drain part. The first piston and the second piston in the water inlet joint cooperate with each other, and the residual water can be discharged without manual operation by using the water pressure difference, and the structure is simple.

[0010] Preferably, the first rod part is provided with a first piston head and a second piston head at two ends respectively, the first piston head is close to the water inlet of the body, and the second piston head is close to the water outlet of the body; the first piston head abuts against or is spaced from the water inlet to close or open the water inlet; and the second piston head is provided with at least one through hole.

[0011] In the present scheme, the first piston can move between the water inlet and the water outlet of the body, when the first piston head abuts against the water inlet of the body, the water inlet is closed and the water flow is blocked; when the first piston head is spaced from the water inlet, the water inlet is opened and the water flow can pass normally. The second piston head is provided with a through hole, so that the water outlet of the body is always communicated with the inside.

[0012] Preferably, the groove is a ring groove arranged around the outer side wall of the first rod part.

[0013] In the present scheme, the first piston will move with the change of water flow, and rotation may occur in the process. The groove is designed as a ring groove structure, so that when the water pressure exceeds a predetermined value, if the first piston rotates, one end of the second piston can cooperate with the groove, so that the automatic drainage structure is more stable.

[0014] Preferably, the second piston includes a third piston head and a second rod part, the elastic member is arranged at one end of the second piston away from the first piston, and one end of the elastic member abuts against the third piston head; one end of the second rod part is connected with the third piston head, and the other end abuts against the side wall of the first rod part or extends into the groove.

[0015] In the present scheme, the elastic member abuts against the third piston head, and is used to apply pressure to the second piston, so that one end of the second rod part always abuts against the side wall of the first rod part or the groove, so that the second piston cooperates with the first piston to realize the automatic drainage function of the water inlet joint.

[0016] Preferably, a plug is arranged at the water outlet of the water drainage part, the plug extends into the water drainage part and is connected with the water drainage part through a sealing ring, and the other end of the elastic member abuts against the plug.

[0017] In this scheme, the plug arranged at the water outlet can abut against the elastic member, so as to ensure the normal operation of the water inlet connector. The connection is improved by the sealing ring, so as to avoid the leakage of residual water from the connection. Meanwhile, the plug can be removed to adjust or replace the elastic member, which is helpful for the maintenance of the water inlet connector.

[0018] Preferably, the plug is internally provided with a water drainage channel, and the diameter of the water drainage channel gradually increases along the water flow drainage direction.

[0019] In this scheme, the water drainage channel is arranged in the plug, so that the residual water in the water inlet connector can be drained through the water drainage channel. The diameter of the water drainage channel gradually increases, so that the smaller end of the diameter does not affect the abutment of the elastic member, and the water flow can be quickly drained after entering the water drainage channel, thereby avoiding the situation that the water drainage channel is blocked due to slow water drainage, and the residual water cannot be drained in time.

[0020] Preferably, the water drainage part is internally provided with a first channel, a second channel and a third channel, and the first channel, the second channel and the third channel are arranged in sequence along the water flow drainage direction.

[0021] The second rod part is arranged in the first channel, and the diameter of the first channel is smaller than the diameter of the third piston head; the third piston head is arranged in the second channel and can move in the second channel; and the elastic member is arranged in the third channel, and the diameter of the third channel is smaller than the diameter of the third piston head.

[0022] In this scheme, the diameter of the first channel is smaller than the diameter of the third piston head, so that when the water flow normally flows in the body, the third piston head abuts against the first channel, so as to prevent the water flow from being drained through the water drainage part, and the diameter of the third channel is smaller than the diameter of the third piston head, so that the third piston head can only move in the second channel, and the elastic member is arranged in the third channel, so as to act on the second piston without affecting the movement of the second piston.

[0023] Preferably, the elastic member is a spring.

[0024] In this scheme, the spring is used as the elastic member, which has simple structure and good effect, and the spring has small volume and does not occupy too much space in the water drainage connector, so as to avoid affecting the operation of other components.

[0025] Preferably, when the water pressure in the body does not exceed a preset value, the water flow pushes the first piston to abut against the water outlet of the body, and one end of the second piston abuts against the side wall of the first piston, and the other end of the second piston blocks the water outlet of the water discharge part.

[0026] When the water pressure in the body exceeds the preset value, the first piston abuts against the water inlet of the body, and the second piston abuts against the groove of the first piston, the elastic member pushes the second piston, and the water outlet of the water discharge part is opened.

[0027] In the scheme, the first piston moves according to the change of the water pressure in the body, when the water flow pushes the first piston to abut against the water outlet, one end of the second piston abuts against the side wall of the first piston, and the second piston is pushed to block the water outlet, so that the water flow is prevented from being discharged from the water outlet, and the normal flow of the water flow is affected; when the water pressure in the body is too large, the first piston abuts against the water inlet, the elastic member pushes the second piston to abut against the groove, the water outlet is automatically opened, residual water in the body is discharged, and the pressure in the body is reduced, so as to avoid damage to the body.

[0028] A gas water heater comprises the water inlet connector as described above.

[0029] In the scheme, the gas water heater can automatically discharge residual water by adopting the water inlet connector, and effectively avoids the water heater from being frozen due to the expansion and cracking of part components of the waterway in winter.

[0030] The positive progress effect of the utility model lies in that: the water inlet connector is provided with a body and a water discharge part, and automatic switching of the water flow in the body or the discharge of residual water from the water discharge part is realized according to the water pressure difference in the water inlet connector. The first piston is arranged in the body, moves between the water inlet and the water outlet of the body according to the change of the water pressure in the body, and is used for closing or opening the water flow channel in the body; the elastic member is used for applying pressure to the second piston, so that the end of the second piston always abuts against the first piston, and with the movement of the first piston, the end of the second piston abuts against the side wall of the first rod part or extends into the groove, and is used for closing or opening the water flow channel in the water discharge part. The first piston and the second piston in the water inlet connector cooperate with each other, utilize the water pressure difference, and can discharge residual water without manual operation, and the structure is simple. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The sectional view of the water inlet connector provided by the utility model embodiment is shown, wherein the water flow channel of the water discharge part is opened, and the arrows in the figure are used for indicating the water flow direction;

[0032] Figure 2 The sectional view of the water inlet connector provided by the utility model embodiment is shown, wherein the water flow channel of the water discharge part is opened, and the arrows in the figure are used for indicating the water flow direction;

[0033] Figure 3 The structure diagram of the water inlet joint is provided in the embodiment of the utility model, wherein the shell of the water inlet joint is not shown.

[0034] Mark explanation:

[0035] The body 1

[0036] The drainage part 2

[0037] The water flow channel 3

[0038] The first piston 4

[0039] The first piston head 5

[0040] The second piston head 6

[0041] The first rod part 7

[0042] The groove 8

[0043] The second piston 9

[0044] The third piston head 10

[0045] The second rod part 11

[0046] The elastic member 12

[0047] The plug 13

[0048] The drainage channel 14

[0049] The sealing ring 15

[0050] The through hole 16

[0051] The water inlet 17

[0052] The water outlet 18

[0053] The drainage outlet 19

[0054] The first channel 20

[0055] The second channel 21

[0056] The third channel 22 Specific implementation

[0057] The utility model will be described in detail below with a preferred embodiment and in combination with the drawings.

[0058] In the embodiment, a water inlet joint is provided, such as Figures 1-3The water inlet joint comprises a body 1 and a drain part 2, the drain part 2 is arranged on the side wall of the body 1, and the body 1 and the drain part 2 have a water flow channel 3 inside; the body 1 is provided with a first piston 4, the first piston 4 has a first rod part 7, and the first rod part 7 is provided with a groove 8; the drain part 2 is provided with a second piston 9 and an elastic member 12, the elastic member 12 acts on the second piston 9; one end of the second piston 9 faces the first rod part 7, the first piston 4 is configured to move between the water inlet 17 and the water outlet 18 of the body 1, and the end of the second piston 9 is abutted against the side wall of the first rod part 7 or extends into the groove 8 under the action of the elastic member 12, so as to close or open the water flow channel 3 between the body 1 and the drain part 2.

[0059] The water inlet joint realizes automatic switching of water flow in the body 1 or residual water discharge from the drain part 2 according to the water pressure difference in the water inlet joint by arranging the body 1 and the drain part 2. The drain part 2 is vertically connected to the side wall of the middle part of the body 1, and the shells of the body 1 and the drain part 2 are integrated without a connecting joint, and the water flow channels 3 in the body 1 and the drain part 2 are also vertically connected. The first piston 4 is arranged in the body 1 and moves between the water inlet 17 and the water outlet 18 of the body 1 according to the change of water pressure in the body 1, and is used for closing or opening the water flow channel 3 in the body 1; the elastic member 12 is used for applying pressure to the second piston 9, so that the end of the second piston 9 is always abutted against the first piston 4, and with the movement of the first piston 4, the end of the second piston 9 is abutted against the side wall of the first rod part 7 or extends into the groove 8, so as to close or open the water flow channel 3 in the drain part 2. The first piston 4 and the second piston 9 in the water inlet joint cooperate with each other, and residual water can be discharged without manual operation by using the water pressure difference, and the structure is simple.

[0060] Specifically, as shown in the drawings, Figure 3 The first rod part 7 is provided with a first piston head 5 and a second piston head 6 at two ends respectively, the first piston head 5 is close to the water inlet 17 of the body 1, and the second piston head 6 is close to the water outlet 18 of the body 1; the first piston head 5 is abutted against or spaced apart from the water inlet 17 to close or open the water inlet 17; the second piston head 6 is provided with at least one through hole 16. The first piston 4 can move between the water inlet 17 and the water outlet 18 of the body 1, when the first piston head 5 is abutted against the water inlet 17 of the body 1, the water inlet 17 is closed, and the water flow is blocked; when the first piston head 5 is spaced apart from the water inlet 17, the water inlet 17 is opened, and the water flow can pass normally. The second piston head 6 is provided with the through hole 16, so that the water outlet 18 of the body 1 is always communicated with the inside.

[0061] The groove 8 is a ring groove arranged on the outer sidewall of the first rod part 7. The first piston 4 moves with the change of water flow, and rotation may occur in the process. The groove 8 is designed as a ring groove structure, so that when the water pressure exceeds a predetermined value, if the first piston 4 rotates, one end of the second piston 9 can cooperate with the groove 8, so that the automatic drainage structure is more stable.

[0062] Further, the second piston 9 includes a third piston head 10 and a second rod part 11, and an elastic member 12 is arranged at one end of the second piston 9 away from the first piston 4, and one end of the elastic member 12 abuts against the third piston head 10; one end of the second rod part 11 is connected with the third piston head 10, and the other end abuts against the sidewall of the first rod part 7 or extends into the groove 8. The elastic member 12 abuts against the third piston head 10, for applying pressure to the second piston 9, so that one end of the second rod part 11 always abuts against the sidewall of the first rod part 7 or the groove 8, so that the second piston 9 cooperates with the first piston 4 to realize the automatic drainage function of the water inlet connector. In other embodiments, the position of the elastic member 12 is not specifically limited, for example, the elastic member 12 can be arranged on the side of the second piston 9 close to the first piston 4, and a certain tension is generated on the second piston 9 by a tension spring or the like.

[0063] Specifically, as shown in Figures 1-2 The part of the second rod part 11 extending into the water flow channel 3 of the body 1 has a smaller diameter than the part of the second rod part 11 located in the drainage part 2, so as to reduce the pressure on the water flow passing through the body 1, and the water flow can pass smoothly; at the same time, the part with a larger diameter is arranged in the drainage part 2, so as to avoid that the second piston 9 swings greatly according to the change of water flow, and the reliability of cooperation between the first piston 4 and the second piston 9 is reduced.

[0064] In this embodiment, the plug 13 is arranged at the drainage port 19 of the drainage part 2, the plug 13 extends into the drainage part 2 and is connected with the drainage part 2 through the sealing ring 15, and the other end of the elastic member 12 abuts against the plug 13. The plug 13 arranged at the drainage port 19 can abut against the elastic member 12, so as to realize the normal work of the water inlet connector. The connection through the sealing ring 15 improves the sealing performance of the connection, and avoids leakage of residual water from the connection. At the same time, the plug 13 can be removed, and the elastic member 12 can be adjusted or replaced, which is helpful for the maintenance of the water inlet connector.

[0065] The plug 13 is internally provided with a drainage channel 14, and the diameter of the drainage channel 14 gradually increases along the drainage direction of the water flow. The residual water in the water inlet joint can be drained through the drainage channel 14. The gradually increasing diameter of the drainage channel 14 ensures that the smaller end of the drainage channel 14 does not affect the abutment of the elastic member 12, and the water flow can be quickly drained after entering the drainage channel 14, avoiding the situation that the drainage channel 14 is blocked due to slow drainage, and the residual water cannot be drained in time. In other embodiments, the plug 13 can be other components as long as it can abut the elastic member 12 and is provided with the drainage channel 14.

[0066] Further, the drainage part 2 is internally provided with a first channel 20, a second channel 21 and a third channel 22, which are arranged in sequence along the drainage direction of the water flow; the second rod part 11 is arranged in the first channel 20, and the diameter of the first channel 20 is smaller than that of the third piston head 10; the third piston head 10 is located in the second channel 21 and can move in the second channel 21; and the elastic member 12 is located in the third channel 22, and the diameter of the third channel 22 is smaller than that of the third piston head 10. The diameter of the first channel 20 is smaller than that of the third piston head 10, so that when the water flow flows normally in the body 1, the third piston head 10 abuts the mouth of the first channel 20 to prevent the water flow from being drained through the drainage part 2, and the diameter of the third channel 22 is smaller than that of the third piston head 10, so that the third piston head 10 can only move in the second channel 21, and the elastic member 12 is arranged in the third channel 22 to act on the second piston 9, but does not affect the movement of the second piston 9.

[0067] Specifically, the elastic member 12 is a spring. The spring is used as the elastic member 12, which has a simple structure and good effect, and the small volume of the spring does not occupy too much space in the drainage joint, so as not to affect the work of other components. In other embodiments, the elastic member 12 can also be other components as long as it can apply a certain pressure to the second piston 9.

[0068] In this embodiment, when the water pressure in the body 1 does not exceed the preset value, as shown in FIG. 1, the water flow pushes the first piston 4 to abut the water outlet 18 of the body 1, one end of the second piston 9 abuts the side wall of the first piston 4, and the other end of the second piston 9 blocks the drainage port 19 of the drainage part 2; when the water pressure in the body 1 exceeds the preset value, as shown in FIG. 2, the first piston 4 abuts the water inlet 17 of the body 1, the second piston 9 abuts the groove 8 of the first piston 4, the elastic member 12 pushes the second piston 9, and the drainage port 19 of the drainage part 2 is opened. Figure 2 Figure 1

[0069] ​​The preset value of the water pressure is set according to the actual working condition, and when the water pressure inside the body 1 can cause damage to the water inlet joint, it is set to exceed the preset value to start automatic drainage. The first piston 4 moves according to the change of the water pressure in the body 1, when the water flow pushes the first piston 4 to abut against the water outlet 18, one end of the second piston 9 abuts against the side wall of the first piston 4, and the second piston 9 is pushed to block the drain port 19, preventing the water flow from being discharged from the drain port 19, affecting the normal flow of the water flow; the water pressure in the body 1 is too large, the first piston 4 abuts against the water inlet 17, the elastic member 12 pushes the second piston 9 to abut against the groove 8, the drain port 19 is automatically opened, the residual water in the body 1 is discharged, and the pressure in the body 1 is reduced to prevent damage to the body 1. In other embodiments, the weight and size of the first piston 4 can be adjusted according to the actual water pressure of the water inlet joint to adapt to the automatic drainage requirements of the water inlet joint.

[0070] In this embodiment, a gas water heater is provided, which comprises the water inlet joint as described above. The gas water heater can automatically discharge residual water by adopting the water inlet joint, effectively avoiding the freezing damage of the water heater due to the expansion and cracking of part of the waterway components in winter.

[0071] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, but these changes and modifications all fall within the protection scope of the present application.

Claims

1. A water inlet connector, characterized in that, The water inlet connector includes a body and a drain section. The drain section is disposed on the side wall of the body, and the body and the drain section have water flow channels inside. The body contains a first piston, which has a first rod portion with a groove; the drainage section contains a second piston and an elastic element, which acts on the second piston. One end of the second piston faces the first rod. The first piston is configured to move between the inlet and outlet of the body. The end of the second piston, under the action of the elastic member, abuts against the side wall of the first rod or extends into the groove, so as to close or open the water flow channel between the body and the drain section.

2. The water inlet connector as described in claim 1, characterized in that, The first rod has a first piston head and a second piston head at its two ends, respectively. The first piston head is close to the water inlet of the body, and the second piston head is close to the water outlet of the body. The first piston head abuts against or is spaced from the water inlet to close or open the water inlet. The second piston head has at least one through hole.

3. The water inlet connector as described in claim 1, characterized in that, The groove is an annular groove formed around the outer wall of the first rod.

4. The water inlet connector as described in claim 1, characterized in that, The second piston includes a third piston head and a second rod. The elastic element is disposed at the end of the second piston away from the first piston, and one end of the elastic element abuts against the third piston head. One end of the second rod is connected to the third piston head, and the other end abuts against the side wall of the first rod or extends into the groove.

5. The water inlet connector as described in claim 4, characterized in that, A plug is provided at the drain outlet of the drainage section. The plug extends into the drainage section and is connected to the drainage section through a sealing ring. The other end of the elastic member abuts against the plug.

6. The water inlet connector as described in claim 5, characterized in that, The plug has a drainage channel inside, and the diameter of the drainage channel gradually increases along the drainage direction of the water flow.

7. The water inlet connector as described in claim 4, characterized in that, The drainage section is internally provided with a first channel, a second channel, and a third channel, which are arranged sequentially along the drainage direction of the water flow. The second rod passes through the first channel, and the diameter of the first channel is smaller than the diameter of the third piston head; the third piston head is located in the second channel and is movable within the second channel; the elastic element is located in the third channel, and the diameter of the third channel is smaller than the diameter of the third piston head.

8. The water inlet connector as described in claim 1, characterized in that, The elastic element is a spring.

9. The water inlet connector as described in any one of claims 1-8, characterized in that, When the water pressure inside the body does not exceed a preset value, the water flow pushes the first piston to abut against the outlet of the body, and one end of the second piston abuts against the side wall of the first piston, while the other end of the second piston blocks the outlet of the drainage section. When the internal water pressure of the body exceeds a preset value, the first piston abuts against the water inlet of the body, and the second piston abuts against the groove of the first piston. The elastic element pushes the second piston, and the drain outlet of the drainage section opens.

10. A gas water heater, characterized in that, Including the water inlet connector as described in any one of claims 1-9 above.

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