CN215635140U

CN215635140U - Multifunctional instant heating type heater

Info

Publication number: CN215635140U
Application number: CN202121785284.1U
Authority: CN
Inventors: 冯海涛
Original assignee: Guangdong Eurasia Crown Metal New Material Co ltd
Current assignee: Guangdong Eurasia Crown Metal New Material Co ltd
Priority date: 2021-07-31
Filing date: 2021-07-31
Publication date: 2022-01-25
Anticipated expiration: 2031-07-31

Abstract

The utility model relates to a multifunctional instant heating type heater, which comprises an integrated water tank and an instant heating type pipeline heater, wherein the integrated water tank comprises a water storage area and a hot water area, a water storage inlet and a water storage outlet are arranged on the water storage area, a cold water inlet, a hot water inlet and a water outlet are arranged on the hot water area, the cold water inlet is connected with the water storage area, the instant heating type pipeline heater is connected between the water storage outlet and the hot water inlet, the multifunctional instant heating type heater also comprises an adjusting valve, a water guide cavity is arranged in the adjusting valve, a high water level opening, a first low water level opening and a second low water level opening which are communicated with the water guide cavity are respectively arranged on the adjusting valve, the adjusting valve extends into the hot water area, the water guide cavity is communicated with the hot water inlet, the adjusting valve is rotated, the hot water and the warm water can be switched, and the operation is very simple.

Description

Multifunctional instant heating type heater

Technical Field

The utility model relates to a multifunctional instant heating type heater.

Background

The structure of the existing instant heating type water dispenser comprises a comprehensive water tank, a pipeline heater and a circuit board, wherein the comprehensive water tank is provided with a water inlet and a water outlet, the water outlet is arranged below the middle part of the comprehensive water tank, and the pipeline heater is positioned below the water outlet and is connected with the water outlet.

The comprehensive water tank comprises a balance water level area and a hot water area, a water level monitoring device is required to be installed in the balance water level area, and the water level monitoring device is used for monitoring the water level of the balance water tank and is convenient for water replenishing operation.

However, the conventional comprehensive water tank of the instant heating type water dispenser has a single structure, so that the instant heating type water dispenser cannot adjust the water outlet temperature and only can outlet hot water, and has a single function.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a multifunctional instant heating type heater capable of switching hot water and warm water.

The purpose of the utility model is realized as follows:

the utility model provides a multi-functional instant heating type heating machine, includes comprehensive water tank and instant heating type pipe heater, comprehensive water tank includes water storage district and hot water district, be provided with water storage entry and water storage export on the water storage district, be provided with cold water entry, hot water entry and delivery port on the hot water district, cold water entry linkage water storage district, instant heating type pipe heater connects between water storage export and hot water entry, still including the governing valve, be provided with the water guide chamber in the governing valve, open high water level mouth, first low water level mouth and the second low water level mouth that communicate the water guide chamber on the governing valve respectively, the governing valve extends into in the hot water district, and the water guide chamber switches on with the hot water entry, and is rotatory the governing valve realizes the switching of following state:

the hot water state: the first low water level port of the regulating valve is closed, and the high water level port is communicated with the water outlet;

and (3) a warm water state: the first low water level port is communicated with the water storage area, and the second low water level port is communicated with the water outlet.

When a user rotates the regulating valve, when a first low water level port of the regulating valve is closed and a high water level port is communicated with a water outlet, water in a water storage area enters the instant heating type pipeline heater along a water storage outlet to be heated, hot water is formed by water boiling and splashing out of a hot water inlet of the instant heating type pipeline heater, the hot water is discharged to the water outlet along a water guide cavity and the high water level port, the user rotates the regulating valve, when the first low water level port of the regulating valve is communicated with a cold water inlet and the second low water level port is communicated with the water outlet, part of water in the water storage area enters the instant heating type pipeline heater along the water storage outlet to be heated, water boiling and splashing out of the hot water inlet of the instant heating type pipeline heater forms hot water, the hot water enters the water guide cavity, the other part of the water storage area enters the water guide cavity along a cold water inlet, the hot water and the cold water are mixed in the water guide cavity to form warm water, the warm water is discharged to the water outlet along the second low water level port, and therefore, the user can realize the hot water generation and the heating, The warm water is switched, and the operation is very simple.

The aim of the utility model can also be solved by the following technical measures:

furthermore, the regulating valve rotates to change the size of the conduction angle between the second low water level port and the water outlet. The water outlet quantity of the warm water is adjusted by changing the size of the conduction angle between the second low water level port and the water outlet, and the operation is simple.

Furthermore, the regulating valve comprises a hollow sleeve with an opening at the bottom and a sealed top, the high water level port, the first low water level port and the second low water level port are respectively arranged on the outer side wall of the hollow sleeve, the inner cavity of the hollow sleeve forms a water guide cavity, the hollow sleeve is inserted into the hot water area from top to bottom, and the edge of the opening at the bottom of the hollow sleeve is rotationally abutted to the periphery of the hot water inlet, so that the hot water inlet is positioned in the hollow sleeve.

Furthermore, a water storage cavity is arranged in the comprehensive water tank, a boss is arranged in the water storage cavity, a hot water area surrounded by peripheral walls is arranged on the boss, the cold water inlet and the water outlet are formed in the peripheral walls, and the hot water inlet is formed in the boss in the peripheral walls.

Furthermore, an inner wall is further arranged on the boss between the outer peripheral wall and the hot water inlet, two notches are formed in the positions, corresponding to the cold water inlet and the water outlet of the outer peripheral wall, of the inner wall respectively, a rotating gap is reserved between the inner wall and the outer peripheral wall, the lower portion of the hollow sleeve is inserted into the rotating gap, and the edge of the bottom opening of the hollow sleeve is rotationally abutted to the edge of the hot water inlet.

Further, still including the knob, the knob is located the top of synthesizing the water tank, the governing valve is provided with the pivot, and the top that the pivot stretches out synthesizes the water tank connects the knob, and the knob drives the governing valve rotation.

Further, the top of governing valve is provided with spacing post, the top inner wall of synthesizing the water tank is provided with first stopper and the spacing limit of second, the spacing limit of first stopper and second encloses into spacing region, spacing post stretches into in the spacing region, and the distance of sliding of spacing post is restricted to spacing region, the rotation angle of restriction governing valve to the rotation angle of restriction knob.

The top of governing valve is provided with spacing post, and spacing post stretches into in the spacing region, and the rotation angle of governing valve is restricted to the sliding distance of spacing post in the spacing region restriction to the rotation angle of restriction knob, thereby prescribe a limit to the user and only can switch off-state, hot water state and warm water state through rotatory knob, avoid user's maloperation, guarantee that off-state, hot water state and warm water state switch smoothly.

Furthermore, the first limiting block and the second limiting edge enclose an arc limiting area, and when the limiting column slides to the second limiting edge from the first limiting block, the regulating valve rotates 180 degrees.

Further, the instant heating type pipeline heater also comprises a microswitch, the microswitch is electrically connected with the instant heating type pipeline heater, a push rod of the microswitch faces to the knob, the knob is provided with a pressing flange, the knob rotates, when the push rod is abutted against the pressing flange, the microswitch starts/closes the instant heating type pipeline heater, and when the push rod is far away from the pressing flange, the microswitch closes/starts the instant heating type pipeline heater.

Through being provided with micro-gap switch, when switching to hot water state or warm water state, the turn-ups of pressing of knob supports and leans on just on the push rod to make micro-gap switch start instant heating type pipe heater, when switching to the off-state, the turn-ups of pressing of knob is kept away from the push rod, thereby makes micro-gap switch close instant heating type pipe heater, improves the safety in utilization of multi-functional instant heating type heater greatly.

The spring type comprehensive water tank is characterized by further comprising a spring and balls, grooves are formed in the bottom of the knob/the top of the comprehensive water tank at intervals, spring accommodating cavities are formed in the top of the comprehensive water tank/the bottom of the knob at intervals, the spring is arranged in the spring accommodating cavities, the balls are seated on the spring, one end of each ball abuts against the corresponding spring, the other end of each ball abuts against the corresponding groove, and the spring forms a reset mechanism of the ball.

When the knob is rotated, the ball enters or leaves the groove of knob bottom and produces vibrations, and the rotatory knob process of user is felt better, synthesizes the water tank top moreover and corresponds off-state, hot water state and warm water state and open there is the spring holding chamber, and the spring holding intracavity is arranged in to the spring, and the spring other end supports and leans on the ball, so when the user rotates to off-state, hot water state and warm water state, the homoenergetic produces corresponding vibrations, and the user of being convenient for learns the state switching, improves the practicality of multi-functional instant heating machine greatly.

The utility model has the following beneficial effects:

according to the utility model, a user rotates the regulating valve, when a first low water level port of the regulating valve is closed and a high water level port is communicated with a water outlet, water in a water storage area enters the instant heating type pipeline heater along a water storage outlet to be heated, hot water is formed by water boiling and splashing out of a hot water inlet of the instant heating type pipeline heater, the hot water is discharged to the water outlet along a water guide cavity and the high water level port, the user rotates the regulating valve, when the first low water level port of the regulating valve is communicated with a cold water inlet and a second low water level port is communicated with the water outlet, part of water in the water storage area enters the instant heating type pipeline heater along the water storage outlet to be heated, water boiling and splashing out of the hot water inlet of the instant heating type pipeline heater forms hot water, the hot water enters the water guide cavity, the other part of water in the water storage area enters the water guide cavity along a cold water inlet, the hot water and the cold water are mixed to form warm water in the water guide cavity, and the warm water is discharged to the water outlet along the second low water level port, therefore, the user can realize the switching of hot water and warm water by rotating the regulating valve, and the operation is very simple.

According to the utility model, the microswitch is arranged, when the heating machine is switched to a hot water state or a warm water state, the pressing flanging of the knob is just abutted against the push rod, so that the microswitch starts the instant heating type pipeline heater, when the heating machine is switched to a closed state, the pressing flanging of the knob is far away from the push rod, so that the microswitch closes the instant heating type pipeline heater, and the use safety of the multifunctional instant heating type heater is greatly improved.

According to the multifunctional instant heating type heater, when the knob rotates, the ball enters or leaves the groove at the bottom of the knob to generate vibration, a user feels better in the process of rotating the knob, the spring accommodating cavity is formed in the top of the comprehensive water tank corresponding to the closed state, the hot water state and the warm water state, the spring is arranged in the spring accommodating cavity, and the other end of the spring abuts against the ball, so that when the user rotates to the closed state, the hot water state and the warm water state, the corresponding vibration can be generated, the user can know the state switching conveniently, and the practicability of the multifunctional instant heating type heater is greatly improved.

Drawings

Fig. 1 is a schematic diagram of a multifunctional tankless heater.

Fig. 2 is a schematic cross-sectional view of fig. 1.

Fig. 3 is an exploded view of the integrated water tank.

Fig. 4 is another exploded perspective view of the integrated water tank.

Fig. 5 is a separate view of the integrated water tank and the water outlet nozzle.

Fig. 6 is a schematic view of a knob.

Fig. 7 is another angle schematic of the knob.

Fig. 8 is a schematic view of a knob and regulator valve combination.

FIG. 9 is another angular schematic view of the knob and regulator valve combination.

Fig. 10 is a schematic view of a base.

Fig. 11 is a schematic sectional view of the integrated water tank.

Fig. 12 is a plan view of the integrated water tank (closed state).

Fig. 13 is a schematic sectional view (closed state) of the integrated water tank.

Fig. 14 is a schematic view of the integrated water tank (closed state).

Fig. 15 is another perspective view of the integrated water tank (closed state).

Fig. 16 is another angular sectional view of the integrated water tank (closed state).

Fig. 17 is a plan view of the integrated water tank (hot water state).

Fig. 18 is a schematic sectional view of the integrated water tank (hot water state).

Fig. 19 is a schematic view of the integrated water tank (hot water state).

Fig. 20 is another angle schematic view of the integrated water tank (hot water state).

Fig. 21 is another angle section view of the integrated water tank (hot water state).

Fig. 22 is a plan view of the integrated water tank (warm water state).

Fig. 23 is a schematic sectional view of the integrated water tank (warm water state).

Fig. 24 is a schematic view of the integrated water tank (warm water state).

Fig. 25 is another angle schematic view (warm water state) of the integrated water tank.

Fig. 26 is another angle section view of the integrated water tank (warm water state).

Detailed Description

The utility model is further described with reference to the following figures and examples:

embodiment, as shown in fig. 1 to 26, a multifunctional instant heating type heater includes an integrated water tank, an instant heating type pipe heater 8, a return pipe 3, a regulating valve 5, a knob 6, a micro switch 7, a water pump 10, a water tank 4, a water outlet nozzle 9, a spring 63 and a ball 64.

The comprehensive water tank is a tank body, the tank body comprises a base 1 and an upper cover 2, an open port is arranged at the top of the base 1, a water storage cavity 11 is arranged in the base 1, a boss 12 is arranged in the water storage cavity 11, a hot water area 13 enclosed by a peripheral wall 121 is arranged on the boss 12, a hot water inlet 14 is arranged on the boss 12 in the peripheral wall 121, a cold water inlet 15 and a water outlet 16 are arranged on the peripheral wall 121, an inner peripheral wall 122 is also arranged on the boss 12 between the peripheral wall 121 and the hot water inlet 14, two notches 123 are respectively arranged on the inner peripheral wall 122 corresponding to the positions of the cold water inlet 15 and the water outlet 16 of the peripheral wall 121, and a rotating gap 124 is arranged between the inner peripheral wall 122 and the peripheral wall 121.

The water storage cavity 11 outside the peripheral wall 121 forms a water storage area 17, the base 1 is provided with a water storage inlet 171 and a water storage outlet 172 which are communicated with the water storage area 17, and the cold water inlet 15 is communicated with the water storage area 17.

The upper cover 2 is fixed at the top of the base 1 and is opened, the bottom wall of the upper cover 2 is provided with a first limiting block 21 and a second limiting edge 22, a limiting area 23 is enclosed by the first limiting block 21 and the second limiting edge 22, and the limiting area 23 is an arc-shaped limiting area 23.

The top of the return pipe 3 is provided with an opening 31, the outer side wall of the upper part of the return pipe 3 close to the opening 31 is provided with a small groove 32, the small groove 32 is communicated with the opening 31, the opening 31 and the small groove 32 together form a return opening 33, the lowest end of the return opening 33 is the bottom edge of the small groove 32, and the highest end of the return opening 33 is the edge of the opening 31.

The back flow pipe 3 passes the bottom of reservoir area 17 and extends into in the reservoir area 17 from bottom to top, and the least significant end of backward flow mouth 33 is less than water storage inlet 171, the least significant end level of delivery port 16 is located between the least significant end and the most significant end of backward flow mouth 33, the bottom of back flow pipe 3 has open mouthful and forms bottom port 34.

The water box 4 is positioned below the comprehensive water tank, the inlet of the water pump 10 is communicated with the water inlet pipeline 101, the outlet of the water pump 10, the water storage inlet 171 and the bottom port 34 of the return pipe 3 are respectively communicated with the water box 4, the inlet of the instant heating type pipe heater 8 is communicated with the water storage outlet 172, and the outlet of the instant heating type pipe heater 8 is communicated with the hot water inlet 14.

The regulating valve 5 comprises a hollow sleeve with an opening at the bottom and a sealed top, the inner cavity of the hollow sleeve forms a water guide cavity 51, the outer side wall of the hollow sleeve is provided with a high water level port 52, a first low water level port 53 and a second low water level port 54, the hollow sleeve is inserted into the rotating gap 124 from top to bottom, the edge of the opening at the bottom of the hollow sleeve is rotationally abutted to the edge of the hot water inlet 14, so that the hot water inlet 14 is located in the hollow sleeve, and the water outlet nozzle 9 is communicated with the water outlet 16.

The top of the upper cover 2 is spaced by the grooves 24, the knob 6 is provided with the pressing flange 61, the bottom of the knob 6 is spaced by the spring accommodating cavity 62, the knob 6 is seated on the top of the upper cover 2, the spring 63 is arranged in the spring accommodating cavity 62, the ball 64 is seated on the spring 63, one end of the ball 64 abuts against the spring 63, the other end of the ball 64 abuts against the corresponding groove 24, and the spring 63 forms a reset mechanism of the ball 64.

The governing valve 5 is provided with pivot 55 and spacing post 56, the top that the upper cover 2 was stretched out to pivot 55 is connected knob 6, and knob 6 drives governing valve 5 rotatory, and spacing post 56 stretches into spacing regional 23 simultaneously, and spacing regional 23 restriction spacing post 56's the distance of sliding, spacing post 56 slides by first stopper 21 to the spacing limit of second 22 in-time, and governing valve 5 is rotatory 180 degrees, realizes the rotation angle of spacing regional 23 restriction governing valve 5 to restriction knob 6's rotation angle.

The microswitch 7 is electrically connected with the instant heating type pipeline heater 8, the push rod 71 of the microswitch 7 faces the knob 6, the knob 6 rotates, when the push rod 71 is abutted against the pressing flange 61, the microswitch 7 starts the instant heating type pipeline heater 8, and when the push rod 71 is far away from the pressing flange 61, the microswitch 7 closes the instant heating type pipeline heater 8.

The adjusting valve 5 rotates to change the size of the conduction angle between the second low water level port 54 and the water outlet 16 or between the high water level port 52 and the water outlet 16.

The working principle is as follows:

and (3) closing state:

when the multifunctional instant heating type heater is in a closed state, the limiting column 56 is located at the central position of the limiting area 23, the flanging 61 is pressed at the same time to be away from the push rod 71 of the microswitch 7, the microswitch 7 closes the instant heating type pipe heater 8, and at the moment, the outer wall of the regulating valve 5 seals the water outlet 16, so that the water outlet 16 cannot drain.

Hot water state of maximum water yield:

when the user rotates the knob 6 counterclockwise, when the limiting column 56 abuts against the first limiting block 21 (the regulating valve 5 rotates by 0 °), and simultaneously presses the flange 61 to abut against the push rod 71, the microswitch 7 starts the instantaneous pipe heater 8, at this time, the peripheral wall 121 closes the first low water level port 53, and the high water level port 52 is communicated with the water outlet 16. The water in the water storage area 17 enters the instant heating type pipe heater 8 along the water storage outlet 172 to be heated, the water in the instant heating type pipe heater 8 is boiled and sprayed out of the hot water inlet 14 to form hot water, and the hot water is discharged to the water outlet nozzle 9 along the water guide cavity 51, the high water level port 52 and the water outlet 16.

Adjusting the water yield of hot water:

the user can adjust the size of the conduction angle between the high water level port 52 and the water outlet 16 by rotating the knob 6 within the range of 0-90 degrees, thereby adjusting the water yield of the hot water.

The warm water state of the maximum water yield:

the user rotates the knob 6 clockwise, when the limiting column 56 abuts against the second limiting block (the regulating valve 5 rotates 180 degrees), and simultaneously presses the flange 61 to abut against the push rod 71, the microswitch 7 starts the instant heating type pipe heater 8, at this time, the first low water level port 53 is communicated with the cold water inlet 15, and the second low water level port 54 is communicated with the water outlet 16. The water in the water storage area 17 enters the instant heating type pipe heater 8 along the water storage outlet 172 to be heated, the water in the instant heating type pipe heater 8 is boiled to spray out the hot water inlet 14 to form hot water, the hot water enters the water guide cavity 51, meanwhile, the water in the water storage area 17 enters the water guide cavity 51 along the cold water inlet 15 and the first low water level port 53, the cold water and the hot water are mixed in the water guide cavity 51 to form warm water, and the warm water is discharged to the water outlet nozzle 9 along the second low water level port 54 and the water outlet 16.

Adjusting the water yield of warm water:

the user rotates the knob 6 within the range of 90-180 degrees, so that the size of the conduction angle between the second low water level port 54 and the water outlet 16 can be adjusted, and the water yield of the warm water is adjusted.

The water outlet nozzle 9 is used for preventing water dripping:

when the multifunctional instant heating type heater is in a closed state, water in the water storage area 17, which is higher than the open opening 31 at the top of the return pipe 3, enters the return pipe 3 along the open opening 31 and is discharged into the water box 4, and simultaneously water in the water storage area 17, which is lower than the open opening 31 at the top of the return pipe 3, enters the return pipe 3 along the small groove 32 and is discharged into the water box 4, so that the water in the water storage area 17, which is higher than the open opening 31 at the top of the return pipe 3, and the water in the water storage area 17, which is lower than the open opening 31 at the top of the return pipe 3, simultaneously enters the return pipe 3 and is discharged into the water box 4, and the water return of the water storage area 17 is greatly accelerated.

Moreover, the open mouth 31 and the small groove 32 jointly form the return port 33, the lowest end of the return port 33 is the bottom edge of the small groove 32, the highest end thereof is the edge of the open mouth 31, and the lowest end level of the water outlet 16 is located between the lowest end and the highest end of the return port 33, so that when the multifunctional instant heating type heating machine is in the closed state, the water level of the water storage area 17 is lower than the lowest end of the return port 33, and the lowest end level of the water outlet 16 is located between the lowest end and the highest end of the return port 33, so that the water level of the water storage area 17 is lower than the lowest end level of the water outlet 16, and the water in the water storage area 17 cannot enter the water outlet 16, and therefore, the water outlet 9 cannot drip.

Claims

1. The utility model provides a multi-functional instant heating type heating machine, includes comprehensive water tank and instant heating type pipe heater, comprehensive water tank includes water storage district and hot water district, be provided with water storage entry and water storage export on the water storage district, be provided with cold water entry, hot water entry and delivery port on the hot water district, cold water entry linkage water storage district, instant heating type pipe heater connects between water storage export and hot water entry, its characterized in that: still including the governing valve, be provided with the water guide chamber in the governing valve, open the high water level mouth, first low water level mouth and the second low water level mouth that have the intercommunication water guide chamber on the governing valve respectively, the governing valve extends into in the hot water district, and the water guide chamber switches on with the hot water entry, and is rotatory the governing valve realizes the switching of following state:

2. The multifunctional instant heating type heater according to claim 1, wherein said regulating valve rotates to change the magnitude of the conduction angle between the second low water level port and the water outlet.

3. The multifunctional instant heating type heater according to claim 1, wherein the regulating valve comprises a hollow sleeve with an opening at the bottom and a sealed top, the high water level port, the first low water level port and the second low water level port are respectively disposed on an outer sidewall of the hollow sleeve, an inner cavity of the hollow sleeve forms a water guide cavity, the hollow sleeve is inserted into the hot water zone from top to bottom, and an edge of the opening at the bottom of the hollow sleeve is rotatably abutted to a periphery of the hot water inlet, so that the hot water inlet is located in the hollow sleeve.

4. The multifunctional instant heating type heater according to claim 3, characterized in that said integrated water tank has a water storage chamber, said water storage chamber has a boss therein, said boss is provided with a hot water zone surrounded by a peripheral wall, said peripheral wall is provided with said cold water inlet and said water outlet, said hot water inlet is provided on said boss in said peripheral wall.

5. The multifunctional instant heating type heater according to claim 4, further comprising an inner wall disposed on the boss between the outer wall and the hot water inlet, wherein two notches are formed on the inner wall corresponding to the cold water inlet and the water outlet of the outer wall, respectively, a rotation gap is formed between the inner wall and the outer wall, the lower portion of the hollow sleeve is inserted into the rotation gap, and the bottom opening edge of the hollow sleeve is rotatably abutted against the hot water inlet edge.

6. The multifunctional instant heating type heater according to claim 5, further comprising a knob, wherein the knob is seated on the top of the integrated water tank, the adjusting valve is provided with a rotating shaft, the rotating shaft extends out of the top of the integrated water tank and is connected with the knob, and the knob drives the adjusting valve to rotate.

7. The multifunctional instant heating type heater according to claim 6, characterized in that a limiting post is disposed on the top of said regulating valve, a first limiting block and a second limiting edge are disposed on the inner wall of the top of said integrated water tank, said first limiting block and said second limiting edge enclose a limiting region, said limiting post extends into the limiting region, the limiting region limits the sliding distance of the limiting post, and limits the rotation angle of the regulating valve, thereby limiting the rotation angle of the knob.

8. The multifunctional instant heating type heater according to claim 7, wherein the first limiting block and the second limiting edge define an arc-shaped limiting area, and the regulating valve rotates 180 degrees when the limiting post slides from the first limiting block to the second limiting edge.

9. The multifunctional instant heating type heater according to claim 6, further comprising a micro switch electrically connected to the instant heating type pipe heater, wherein a push rod of the micro switch faces the knob, the knob is provided with a pressing flange, the knob rotates, when the push rod abuts against the pressing flange, the micro switch turns on/off the instant heating type pipe heater, and when the push rod is far away from the pressing flange, the micro switch turns off/on the instant heating type pipe heater.

10. The multifunctional instant heating type heater according to claim 9, further comprising a spring and a ball, wherein the bottom of the knob/the top of the integrated water tank are spaced by a groove, the top of the integrated water tank/the bottom of the knob are spaced by a spring accommodating cavity, the spring is disposed in the spring accommodating cavity, the ball is seated on the spring, one end of the ball abuts against the spring, the other end of the ball abuts against the corresponding groove, and the spring constitutes a return mechanism for the ball.