Coupler for controlling high and low water levels

Abstract

The utility model relates to a coupler for controlling high and low water levels, which comprises a fixed seat, a lower coupling seat and a movable seat, the movable seat is movably assembled above the fixed seat, and the lower coupling seat is movably assembled above the movable seat; a first on-off mechanism and a second on-off mechanism are arranged on the movable seat and the fixed seat respectively, and a first touch pressing column and a second touch pressing column are arranged on the lower coupling seat corresponding to the first on-off mechanism and the second on-off mechanism respectively. The lower coupling seat settles to a first height and triggers the first on-off mechanism firstly, and when the bearing weight of the lower coupling seat is equal to or exceeds a rated load corresponding to a preset high water level, the lower coupling seat presses and pushes the movable seat to continuously settle to a second height and triggers the second on-off mechanism; according to the coupler, when the lower coupling seat is subjected to secondary settlement due to load, the situation that the first touch pressing column presses and damages the first on-off mechanism is avoided.

Description

Technical Field

[0001] The utility model relates to the field of temperature controllers, in particular to a coupler for controlling high and low water levels. Background Art

[0002] The existing electric kettle is generally composed of a base and a kettle body, wherein the base is provided with a control circuit, a heating element is provided at the lower part of the kettle body, and the kettle body and the control circuit are connected through a coupler. The current coupler structure is such as a Chinese patent document, patent number: CN202320917711.X, a dual water level control connector, which mainly includes a fixed seat and a lower coupling seat, and a low water level micro switch and a high water level micro switch are provided on the fixed seat for serial connection to the water adding circuit. The low water level micro switch and the high water level micro switch are triggered successively to control the on and off of the water adding circuit. However, the applicant discovered during actual use that both the low water level microswitch and the high water level microswitch were fixed on the fixed seat. When the low water level touch piece and the high water level touch piece sank for the second time on the lower coupling seat, the low water level microswitch would be pressed down for the second time by the low water level touch piece. The increased force could easily cause damage to the low water level microswitch, making it impossible for the water adding circuit to effectively control the water level of the kettle. Therefore, the applicant improved and perfected the coupler, and combined with the above-mentioned prior art, provided a new technical solution to solve the above-mentioned defects for consumers to choose and use. Summary of the invention

[0003] The utility model aims to provide a coupler for controlling high and low water levels which has a simple and reasonable structure, is easy to install and has a stable structure.

[0004] A coupler for controlling high and low water levels comprises a fixed seat and a lower coupling seat for supporting a kettle body and electrically connected to the kettle body, and also comprises a movable seat, wherein the movable seat is movably assembled above the fixed seat by a first elastic reset structure and can move up and down relative to the fixed seat, and the lower coupling seat is movably assembled above the movable seat by a second elastic reset structure and can move up and down relative to the movable seat; the movable seat and the fixed seat are respectively provided with a first on-off mechanism and a second on-off mechanism for being connected in series to a water adding circuit, and the lower coupling seat is respectively provided with a first touch-and-pressure column and a second touch-and-pressure column corresponding to the first on-and-off mechanism and the second on-and-off mechanism, when the load-bearing weight of the lower coupling seat is equal to or exceeds the rated load corresponding to the preset low water level, the lower coupling seat sinks to the first height and first triggers the first on-and-off mechanism, and when the load-bearing weight of the lower coupling seat is equal to or exceeds the rated load corresponding to the preset high water level, the lower coupling seat presses the movable seat to continue to sink to the second height and triggers the second on-and-off mechanism.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, the first on-off mechanism and the second on-off mechanism are both micro switches, the lengths of the first touch-pressure column and the second touch-pressure column are different, the movable distance between the first touch-pressure column and the first on-off mechanism is smaller than the movable distance between the second touch-pressure column and the second on-off mechanism, and the bottoms of the first touch-pressure column and the second touch-pressure column successively touch the switch keys of the first on-off mechanism and the second on-off mechanism respectively.

[0007] As a further solution, a first guide structure is arranged between the movable seat and the fixed seat, and the first elastic reset structure is arranged on the first guide structure; a second guide structure is arranged between the movable seat and the lower coupling seat, and the second elastic reset structure is arranged on the second guide structure.

[0008] As a further solution, the first guide structure includes a first connecting boss and a guide through hole, and a plurality of lower spring positioning grooves are provided on the bottom surface of the movable seat, and the first connecting boss is provided in some of the lower spring positioning grooves;

[0009] The first elastic reset structure includes a first spring, which is sleeved outside the first connecting protrusion and one end of which is embedded in the lower spring positioning groove;

[0010] An inner flange is provided at the bottom of the fixing seat, and the other end of the first spring is abutted against the top surface of the inner flange. A guide through hole is provided on the inner flange, and the guide through hole and the first connecting boss form a linear sliding fit. An adjustable screw is fastened at the bottom of the first connecting boss, and the head of the adjustable screw is limitedly abutted against the bottom surface of the inner flange.

[0011] As a further solution, the second guide structure includes a second guide boss and a guide sleeve, a plurality of upper spring positioning grooves are provided on the bottom surface of the lower coupling seat, and the second guide boss is integrally arranged at the center position of the upper spring positioning groove;

[0012] The second elastic reset structure includes a second spring, which is sleeved outside the second guide protrusion and one end of which is embedded in the upper spring positioning groove;

[0013] The guide sleeve is arranged on the top surface of the movable seat and forms a linear sliding fit with the second guide protrusion, and the other end of the second spring abuts against the top surface of the guide sleeve.

[0014] As a further solution, a load-bearing cover for supporting the kettle body is integrally or detachably connected to the outer circumference of the lower coupling seat. The load-bearing cover moves up and down with the lower coupling seat and is limited to abut against the top of the fixed seat.

[0015] As a further solution, a first mounting bracket is provided on the movable seat, and a second mounting bracket is provided on the fixed seat. The sides of the first mounting bracket and the second mounting bracket are both provided with elastic buckles, and the first on-off mechanism and the second on-off mechanism are respectively fixedly connected to the first mounting bracket and the second mounting bracket by buckling of the elastic buckles.

[0016] As a further solution, a first fool-proof structure is provided between the fixed seat and the movable seat, and a second fool-proof structure is provided between the movable seat and the lower coupling seat.

[0017] As a further solution, the first fool-proof structure includes a fool-proof convex rib and a fool-proof groove, the fool-proof convex rib is longitudinally arranged on the outer wall surface of the movable seat, and the fool-proof groove is longitudinally opened on the inner wall surface of the fixed seat;

[0018] The second fool-proofing structure includes a fool-proofing protrusion and a fool-proofing recess. The bottom of the lower coupling seat is provided with a plurality of support seats, and the bottom of one of the support seats is provided with a downward fool-proofing recess; the fool-proofing protrusion is vertically arranged on the top surface of the movable seat.

[0019] As a further solution, a central through hole is provided in the lower coupling seat, a water inlet pipe is elastically mounted in the central through hole, and avoidance openings are provided at the bottom of the fixed seat and the movable seat corresponding to the water inlet pipe.

[0020] The beneficial effects of the utility model are as follows:

[0021] The utility model discloses a coupler for controlling high and low water levels. The structure triggers two micro switches in sequence so that after a certain amount of water is poured out of the kettle, when the water level in the kettle is between the lowest water level and the highest water level, the water adding circuit is kept disconnected, so that the kettle will not be frequently added with water and the water body will not be repeatedly heated, which can further improve the user experience, reduce the number of times of adding water and heating, reduce power consumption, and save energy and protect the environment.

[0022] The utility model discloses a coupler for controlling high and low water levels. In the process of adding water, the lower coupling seat of the structure will settle twice in response to the load. During the secondary settlement, the elastically movable seat plays a buffering role, so that the first touch-pressure column and the first on-off mechanism, which have been cooperating with each other, can maintain a relatively static position. The lower coupling seat and the movable seat move downward synchronously, so that the second touch-pressure column triggers the second on-off mechanism, which can prevent the force applied by the first touch-pressure column to the first on-off mechanism from increasing during the secondary settlement, avoid the damage of the first on-off mechanism caused by the secondary downward pressure of the first touch-pressure column, and improve the service life of the temperature controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0024] Figure 2 It is a schematic diagram of the cross section and partial enlarged structure of the coupler in the utility model.

[0025] Figure 3 It is another angle cross-section and partial enlarged structural schematic diagram of the coupler in the utility model.

[0026] Figure 4 It is a schematic diagram of the exploded structure of the fixed seat and the movable seat in the utility model.

[0027] Figure 5 It is a schematic diagram of the structure of the fixing seat in the utility model.

[0028] Figure 6 It is a schematic diagram of the exploded structure of the movable seat and the lower coupling seat in the utility model.

[0029] Figure 7 It is a schematic diagram of the structure of the movable seat in the utility model. DETAILED DESCRIPTION

[0030] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0031] like Figures 1 to 7 As shown, a coupler for controlling high and low water levels comprises a fixed seat 1 and a lower coupling seat 2 for supporting a kettle body and electrically connected to the kettle body, and also comprises a movable seat 3, wherein the movable seat 3 is movably assembled above the fixed seat 1 through a first elastic reset structure and can move up and down relative to the fixed seat 1, and the lower coupling seat 2 is movably assembled above the movable seat 3 through a second elastic reset structure and can move up and down relative to the movable seat 3; the movable seat 3 and the fixed seat 1 are respectively provided with a first on-off mechanism 5 and a second on-off mechanism 6 for being connected in series to a water supply circuit 4, and the lower coupling seat 2 is respectively provided with a first touch-and-press column 7 and a second touch-and-press column 8 corresponding to the first on-and-off mechanism 5 and the second on-and-off mechanism 6, when the load-bearing weight of the lower coupling seat 2 is equal to or exceeds the rated load corresponding to the preset low water level, the lower coupling seat 2 sinks to the first height and first triggers the first on-and-off mechanism 5, and when the load-bearing weight of the lower coupling seat 2 is equal to or exceeds the rated load corresponding to the preset high water level, the lower coupling seat 2 pushes the movable seat 3 to continue to sink to the second height and trigger the second on-and-off mechanism 6.

[0032] During the water adding process of this thermostat, the lower coupling seat 2 will settle for the second time in response to the load. During the secondary settlement, the elastically movable seat 3 plays a buffering role, so that the first touch-pressure column 7 and the first on-off mechanism 5 that have been coordinated with each other can maintain a relatively fixed position. The lower coupling seat 2 and the movable seat 3 move downward synchronously, so that the second touch-pressure column 8 triggers the second on-off mechanism 6, which can prevent the increase of the force applied by the first touch-pressure column 7 to the first on-off mechanism 5 during the secondary settlement, avoid the damage of the first on-off mechanism 5 caused by the secondary downward pressure of the first touch-pressure column 7, and improve the service life of the thermostat.

[0033] The first on-off mechanism 5 and the second on-off mechanism 6 are both micro switches, the first touch-pressure column 7 and the second touch-pressure column 8 have different lengths, wherein the movable distance between the first touch-pressure column 7 and the first on-off mechanism 5 is smaller than the movable distance between the second touch-pressure column 8 and the second on-off mechanism 6, and the bottoms of the first touch-pressure column 7 and the second touch-pressure column 8 successively touch the switch keys of the first on-off mechanism 5 and the second on-off mechanism 6 respectively;

[0034] The lengths of the first touch-pressure column 7 and the second touch-pressure column 8 can be determined according to the installation heights of the first on-off mechanism 5 and the second on-off mechanism 6. In the present embodiment, the length of the first touch-pressure column 7 is smaller than the length of the second touch-pressure column 8, so that the movable distance between the first touch-pressure column 7 and the switch key of the first on-off mechanism 5 is smaller than the movable distance between the second touch-pressure column 8 and the switch key of the second on-off mechanism 6, ensuring that after the first touch-pressure column 7 touches the first on-off mechanism 5, there is still sufficient margin of movement between the second touch-pressure column 8 and the second on-off mechanism 6.

[0035] The specific principle is: before the kettle body leaves the factory, a minimum water filling level and a maximum water cut-off level are preset in the kettle body, and clean water is added into the kettle body until the preset minimum water filling level, and then the total weight of the kettle body plus the water body is used as the low water level rated load of the lower coupling seat 2, and then clean water is continued to be added into the kettle body until the preset maximum water cut-off level, and then the total weight of the kettle body plus the water body is used as the high water level rated load of the lower coupling seat 2;

[0036] When the kettle is used out of the factory, water is automatically added to the kettle body from zero water volume. When the total weight of the kettle body and water is equal to the low water level rated load of the lower coupling seat 2, indicating that the water level of the kettle body has reached the lowest water level, the lower coupling seat 2 will sink to the first height relative to the movable seat 3 and at the same time drive the first touch-pressure column 7 to press the switch key of the first on-off mechanism 5. At this time, the water adding circuit 4 will continue to be connected, and the kettle body will continue to add water;

[0037] When water is continuously added so that the total weight of the kettle body and the water is equal to the high water level rated load of the lower coupling seat 2, indicating that the water level of the kettle body has reached the highest water cut-off level, the lower coupling seat 2 will press the movable seat 3 and continue to sink to the second height. At this time, the position between the lower coupling seat 2 and the movable seat 3 remains relatively fixed, and at the same time drives the second touch-pressure column 8 to press the switch key of the second on-off mechanism 6. When the first on-off mechanism 5 and the second on-off mechanism 6 are triggered at the same time, the kettle body disconnects the water adding circuit 4 and stops adding water, and then the kettle body is heated;

[0038] After the user picks up the kettle and pours water, the total weight of the kettle body and water gradually decreases, but the water level of the remaining water is still between the lowest water filling level and the highest water cut-off level, so that the total weight of the kettle body and water is between the low water level rated load and the high water level rated load. At this time, the lower coupling seat 2 will be lifted up again to between the first height and the second height, and the height can only meet the first touch-pressure column 7 to keep pressing the switch key of the first on-off mechanism 5. This situation can still keep the water-adding circuit 4 in the disconnected state until the water level of the remaining water is lower than the lowest water filling level. At this time, the lower coupling seat 2 and the movable seat 3 will be lifted up again to above the first height, the first touch-pressure column 7 and the second touch-pressure column 8 will leave the first on-off mechanism 5 and the second on-off mechanism 6, the water-adding circuit 4 will be connected again to add water, and then the above steps will be repeated.

[0039] In other embodiments, the first on-off mechanism 5 and the second on-off mechanism 6 may also be other push switches, touch switches, induction switches, etc.

[0040] A first guide structure is arranged between the movable seat 3 and the fixed seat 1, and the first elastic reset structure is arranged on the first guide structure; a second guide structure is arranged between the movable seat 3 and the lower coupling seat 2, and the second elastic reset structure is arranged on the second guide structure; the first guide structure and the second guide structure help to ensure that the lower coupling seat 2 can move up and down in a vertical direction relative to the movable seat 3, and the movable seat 3 can move up and down in a vertical direction relative to the fixed seat 1.

[0041] In this embodiment, the first guide structure includes a first connecting protrusion 302 and a guide through hole 111, and a plurality of lower spring positioning grooves 301 are provided on the bottom surface of the movable seat 3, and the first connecting protrusion 302 is provided in some of the lower spring positioning grooves 301;

[0042] The first elastic reset structure includes a first spring 9, which is sleeved outside the first connecting protrusion 302 and one end of which is embedded in the lower spring positioning groove 301;

[0043] An inner flange 11 is provided at the bottom of the fixing seat 1, and the other end of the first spring 9 is abutted against the top surface of the inner flange 11. A guide through hole 111 is opened on the inner flange 11, and the guide through hole 111 forms a linear sliding fit with the first connecting boss 302. An adjustable screw A is fastened to the bottom of the first connecting boss 302, and the head of the adjustable screw A is limitedly abutted against the bottom surface of the inner flange 11; integrating the first elastic reset structure and the first guide structure can save space and keep the coupler compact.

[0044] By adjusting the position of the adjustable screw A, the timing when the second contact and pressure column 8 presses the second on-off mechanism 6 can be changed, thereby adjusting the high water level rated load of the upper coupling seat.

[0045] The first guide structure also includes a first guide boss 112 and a small guide slot 303. The first guide boss 112 is arranged on the top surface of the inner flange 11 and is staggered with the guide holes 111. The small guide slot 303 is opened on the movable seat 3 and is staggered with the lower spring positioning slot 301. The first guide boss 112 and the small guide slot 303 form a linear sliding fit.

[0046] An upper positioning portion 304 extends from the lower spring positioning groove 301 of another part, and a lower positioning portion 113 extends from the top surface of the inner flange 11 to correspond to the upper positioning portion 304 and to abut against the lower positioning portion 113 . Part of the first spring 9 is sleeved outside the upper positioning portion 304 and the lower positioning portion 113 .

[0047] In this embodiment, the second guide structure includes a second guide protrusion 202 and a guide sleeve 305. The bottom surface of the lower coupling seat 2 is provided with a plurality of upper spring positioning grooves 201. The second guide protrusion 202 is integrally arranged at the center of the upper spring positioning groove 201.

[0048] The second elastic reset structure includes a second spring 10, which is sleeved outside the second guide protrusion 202 and one end of which is embedded in the upper spring positioning groove 201;

[0049] The guide sleeve 305 is arranged on the top surface of the movable seat 3 and forms a linear sliding fit with the second guide boss 202, and the other end of the second spring 10 is abutted against the top surface of the guide sleeve 305; integrating the second elastic reset structure and the second guide structure can save space and keep the coupler compact.

[0050] The second guide structure also includes a second connecting boss 203 and a large guiding groove 306. The second connecting boss 203 is arranged on the bottom surface of the lower coupling seat 2 and is staggered with the second guiding boss 202. The large guiding groove 306 is opened on the movable seat 3 and is staggered with the upper spring positioning groove 201. The large guiding groove 306 and the second connecting boss 203 form a linear sliding fit. An adjustable screw B is fastened at the bottom of the second connecting boss 203, and the head of the adjustable screw B is limitedly held against the bottom surface of the movable seat 3.

[0051] By adjusting the position of the adjustable screw B, the timing when the first contact and pressure column 7 presses the first on-off mechanism 5 can be changed, thereby adjusting the low water level rated load of the upper coupling seat.

[0052] The outer circumference of the lower coupling seat 2 is integrally or detachably connected with a stress-bearing cover 12 for supporting the kettle body. The stress-bearing cover 12 moves up and down with the lower coupling seat 2 and is limited to be supported on the top of the fixed seat 1; the stress-bearing cover 12 can protect the through hole for assembling the coupler, has a waterproof and dustproof effect, and can disperse the weight of the kettle body borne by the lower coupling seat 2 and limit it, so as to prevent the lower coupling seat 2 from moving downward too much.

[0053] The movable seat 3 is provided with a first mounting frame 307, and the fixed seat 1 is provided with a second mounting frame 13. The sides of the first mounting frame 307 and the second mounting frame 13 are provided with elastic undercuts 308 and elastic undercuts 131. The first on-off mechanism 5 and the second on-off mechanism 6 are respectively fixedly connected to the first mounting frame 307 and the second mounting frame 13 by the buckling of the elastic undercuts 308 and the elastic undercuts 131. The structure is simple, and the assembly efficiency of the two micro switches is improved. After being assembled in place, the lead-out ends of the first on-off mechanism 5 and the second on-off mechanism 6 are led out to the outside of the coupler from the bottom of the first mounting frame 307 or the second mounting frame 13.

[0054] A first fool-proofing structure is provided between the fixed seat 1 and the movable seat 3, and a second fool-proofing structure is provided between the movable seat 3 and the lower coupling seat 2; the first fool-proofing structure and the second fool-proofing structure can enable the components to be more accurately aligned during assembly, thereby improving the assembly efficiency of the movable seat 3 and the lower coupling seat 2.

[0055] Specifically, the first fool-proof structure includes a fool-proof rib 309 and a fool-proof groove 14, wherein the fool-proof rib 309 is longitudinally arranged on the outer wall surface of the movable seat 3, and the fool-proof groove 14 is longitudinally opened on the inner wall surface of the fixed seat 1;

[0056] The second fool-proofing structure includes a fool-proofing protrusion 310 and a fool-proofing recess 205 . A plurality of support seats 204 are provided at the bottom of the lower coupling seat 2 , and a fool-proofing recess 205 facing downward is provided at the bottom of one of the support seats 204 . The fool-proofing protrusion 310 is vertically arranged on the top surface of the movable seat 3 .

[0057] The lower coupling seat 2 is provided with a central through hole 201, in which a water inlet pipe 15 is elastically mounted, and the fixed seat 1 and the movable seat 3 are provided with avoidance openings at the bottom corresponding to the water inlet pipe 15; this structure enables the coupler to have a bottom water supply function.

[0058] In addition, a bottom cover 16 is also included, which is movably connected to the bottom of the fixing base 1 through fastening units such as screws, and the panel is clamped between the bottom cover 16 and the outer flange of the fixing base 1 by tightening the fastening units. This structure belongs to the prior art and will not be elaborated in detail here.

[0059] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A coupler for controlling high and low water levels, comprising a fixing seat and a lower coupling seat for supporting a kettle body and electrically connected to the kettle body, characterized in that : It also includes a movable seat, which is movably assembled above the fixed seat through a first elastic reset structure and can move up and down relative to the fixed seat, and the lower coupling seat is movably assembled above the movable seat through a second elastic reset structure and can move up and down relative to the movable seat; the movable seat and the fixed seat are respectively provided with a first on-off mechanism and a second on-off mechanism for being connected in series with the water supply circuit, and the lower coupling seat is respectively provided with a first touch-and-pressure column and a second touch-and-pressure column corresponding to the first on-and-off mechanism and the second on-and-off mechanism. When the load-bearing weight of the lower coupling seat is equal to or exceeds the rated load corresponding to the preset low water level, the lower coupling seat sinks to the first height and first triggers the first on-and-off mechanism. When the load-bearing weight of the lower coupling seat is equal to or exceeds the rated load corresponding to the preset high water level, the lower coupling seat presses the movable seat to continue to sink to the second height and trigger the second on-and-off mechanism.

2. A coupler for controlling high and low water levels according to claim 1, characterized in that :The first on-off mechanism and the second on-off mechanism are both micro switches, the lengths of the first touch-pressure column and the second touch-pressure column are different, the movable distance between the first touch-pressure column and the first on-off mechanism is smaller than the movable distance between the second touch-pressure column and the second on-off mechanism, and the bottoms of the first touch-pressure column and the second touch-pressure column successively touch the switch keys of the first on-off mechanism and the second on-off mechanism respectively.

3. A coupler for controlling high and low water levels according to claim 1, characterized in that : A first guide structure is arranged between the movable seat and the fixed seat, and the first elastic reset structure is arranged on the first guide structure; a second guide structure is arranged between the movable seat and the lower coupling seat, and the second elastic reset structure is arranged on the second guide structure.

4. A coupler for controlling high and low water levels according to claim 3, characterized in that : The first guide structure includes a first connecting boss and a guide through hole, and a plurality of lower spring positioning grooves are provided on the bottom surface of the movable seat, and the first connecting boss is provided in some of the lower spring positioning grooves; The first elastic reset structure includes a first spring, which is sleeved outside the first connecting protrusion and one end of which is embedded in the lower spring positioning groove; An inner flange is provided at the bottom of the fixing seat, and the other end of the first spring is abutted against the top surface of the inner flange. A guide through hole is provided on the inner flange, and the guide through hole and the first connecting boss form a linear sliding fit. An adjustable screw is fastened at the bottom of the first connecting boss, and the head of the adjustable screw is limitedly abutted against the bottom surface of the inner flange.

5. A coupler for controlling high and low water levels according to claim 3, characterized in that : The second guide structure includes a second guide boss and a guide sleeve, a plurality of upper spring positioning grooves are provided on the bottom surface of the lower coupling seat, and the second guide boss is integrally arranged at the center position of the upper spring positioning groove; The second elastic reset structure includes a second spring, which is sleeved outside the second guide protrusion and one end of which is embedded in the upper spring positioning groove; The guide sleeve is arranged on the top surface of the movable seat and forms a linear sliding fit with the second guide protrusion, and the other end of the second spring abuts against the top surface of the guide sleeve.

6. A coupler for controlling high and low water levels according to claim 1, characterized in that The outer circumference of the lower coupling seat is integrally or detachably connected with a load-bearing cover for supporting the kettle body. The load-bearing cover moves up and down with the lower coupling seat and is limited to abut against the top of the fixed seat.

7. A coupler for controlling high and low water levels according to claim 1, characterized in that : A first mounting frame is arranged on the movable seat, and a second mounting frame is arranged on the fixed seat. The sides of the first mounting frame and the second mounting frame are both provided with elastic undercuts, and the first on-off mechanism and the second on-off mechanism are respectively fixedly connected to the first mounting frame and the second mounting frame by buckling of the elastic undercuts.

8. A coupler for controlling high and low water levels according to claim 1, characterized in that : A first fool-proof structure is arranged between the fixed seat and the movable seat, and a second fool-proof structure is arranged between the movable seat and the lower coupling seat.

9. A coupler for controlling high and low water levels according to claim 8, characterized in that : The first fool-proof structure includes a fool-proof convex rib and a fool-proof groove, the fool-proof convex rib is longitudinally arranged on the outer wall surface of the movable seat, and the fool-proof groove is longitudinally opened on the inner wall surface of the fixed seat; The second fool-proofing structure includes a fool-proofing protrusion and a fool-proofing recess. The bottom of the lower coupling seat is provided with a plurality of support seats, and the bottom of one of the support seats is provided with a downward fool-proofing recess; the fool-proofing protrusion is vertically arranged on the top surface of the movable seat.

10. A coupler for controlling high and low water levels according to claim 1, characterized in that : A central through hole is arranged in the lower coupling seat, and a water inlet pipe is elastically assembled in the central through hole. The fixed seat and the movable seat are provided with avoidance openings at the bottom of the water inlet pipe corresponding to each other.

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