Liquid heater capable of detecting liquid level across air

Abstract

The utility model relates to kitchen appliances, in particular to a liquid heater capable of detecting liquid level across the air, which comprises a glass cup body and a detection plate, the detection plate is vertically mounted on the peripheral wall of the glass cup body, the outer surface of the peripheral wall of the glass cup body is curved, and a positioning plate is fixed on the outer side of the peripheral wall of the glass cup body. The edge of the positioning plate is tightly attached to the outer surface of the peripheral wall of the glass cup body, the positioning plate and the peripheral wall of the glass cup body define a containing cavity for positioning the detection plate, an opening communicated with the containing cavity is formed in one end of the positioning plate, and a glue containing groove is formed between the detection plate and the peripheral wall of the glass cup body; glue is poured into the glue containing groove through the opening so as to fix the detection plate. According to the liquid heater disclosed by the utility model, an ingenious positioning and fixing structure is designed, so that the detection plate can be more reliably positioned on the outer wall of the curved-surface-shaped glass cup body, and in the process of fixing the detection plate through glue pouring, the better positioning and fixing effects of the detection plate can be achieved with less glue pouring amount.

Description

Technical Field

[0001] The utility model relates to a kitchen appliance, in particular to a liquid heater capable of detecting liquid level in the air. Background Art

[0002] Prior art CN201610753199.4 discloses that a signal PCB board is provided between the cup body and the hand-held handle of a food processor, and a metal sheet is provided on the signal PCB board. When the volume of the food in the cup body changes, the capacitor formed by the metal sheet and the food in the cup body will generate a charge signal, and the signal PCB board will then transmit the charge signal to the control circuit board. The control circuit board can judge the height of the current food liquid level in the cup body according to the transmitted signal. At the same time, the control circuit board controls the electric heating element or the knife group according to the current liquid level, thereby effectively controlling the change of the liquid level of the food and preventing food from overflowing. However, in this solution, there is an installation gap between the signal PCB board and the cup body, and the signal PCB board has no reliable positioning structure relative to the cup body, and the relative positions of the two are not fixed. Based on this, the signal PCB board cannot accurately identify the overflow signal. Therefore, the above-mentioned food processor still does not completely solve the problem of food overflow.

[0003] In order to make the detection plate and the cup body have a relatively better positioning relationship. The applicant previously proposed a patent with application number CN201720526032.4. The patent discloses that the capacitive sensing plate is positioned on the outer wall of the glass cup through a handle shell. During the installation process, two symmetrical and oppositely spliced ​​and fixed handle covers need to clamp the handle while clamping the capacitive sensing plate, so as to achieve the positioning of the capacitive sensing plate while fixing the handle shell, and ensure the relative position relationship between the capacitive sensing plate and the glass cup body. Although in this solution, the capacitive sensing plate and the glass cup body are in a relatively fixed relationship and no displacement will occur between the two, in this structure, a handle is required to be provided on the glass cup body to position the handle shell, and then the capacitive sensing plate is fixed and limited by the positioning of the handle shell. Not only is the installation structure complicated, but also when there is an assembly error between the handle shell and the handle, it will cause the capacitive sensing plate to detect the liquid level signal inaccurately. What's more, the existing food processing machines or health pots use a large amount of tubular glass, and tubular glass cannot be integrally formed into a handle structure on the glass cup body. Therefore, the above solution cannot be applied to tubular glass cup bodies.

[0004] In addition, the prior art CN201921962352.X also discloses a capacitive continuous liquid level detection structure and an electric kettle thereof. In this scheme, the outer surface of the kettle body of the electric kettle is an arc-shaped structure, so a soft PFB board is pasted on the outer wall of the kettle body. Although the soft PFB board can solve the problem of installing the liquid level detection board on the tube glass cup body, the soft PFB board has a higher manufacturing cost and is more prone to damage. Moreover, during the boiling process of the electric kettle, the high temperature of the outer wall of the kettle is likely to cause the denaturation of the viscose, which not only affects the adhesive effect of the detection board for long-term use, but also the denatured viscose may cause damage to the printed circuit on the detection board. Based on this, how to reliably position and install the rigid liquid level detection board on the outer wall of the arc-shaped glass cup body has always been a difficulty for R&D engineers who want to apply the remote detection technology to kitchen appliances to detect liquid levels. Utility Model Content

[0005] The purpose to be achieved by the utility model is to provide a liquid heater for detecting liquid level in the air. The liquid heater is designed with an ingenious positioning and fixing structure, so that the detection plate can be more reliably positioned on the outer wall of the curved glass cup body. Moreover, in the process of glue pouring and fixing the detection plate, a smaller amount of glue can be used to achieve better positioning and fixing effects of the detection plate.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a liquid heater for detecting liquid level in the air, comprising a glass cup body and a strip-shaped detection plate for detecting liquid level in the air, the detection plate being vertically installed on the peripheral wall of the glass cup body, and characterized in that: the outer surface of the peripheral wall of the glass cup body is curved, and a positioning plate is fixed to the outer side of the peripheral wall of the glass cup body, the edge of the positioning plate is tightly attached to the outer surface of the peripheral wall of the glass cup body, and the positioning plate and the peripheral wall of the glass cup body are enclosed to form a accommodating cavity for positioning the detection plate, and one end of the positioning plate has an opening connected to the accommodating cavity, a glue containing groove is formed between the detection plate and the peripheral wall of the glass cup body, and glue is poured into the glue containing groove through the opening to fix the detection plate.

[0007] Furthermore, the outer surface of the peripheral wall of the glass body is in the shape of a curved surface convex outward, the detection plate is located in the accommodating cavity and is pressed against the peripheral wall of the glass body, and the glue containing groove is formed between the two side edges of the detection plate and the peripheral wall of the glass body;

[0008] Alternatively, the outer surface of the peripheral wall of the glass cup body is a curved surface concave toward the center of the glass cup body, the detection plate is located in the accommodating cavity and pressed against the peripheral wall of the glass cup body, and the horizontal cross-section of the glue containing groove is crescent-shaped.

[0009] Furthermore, the edge of the positioning plate has a fitting portion protruding toward the glass body and adapted to the outer surface of the peripheral wall of the glass body, wherein the fitting width between the fitting portion and the outer surface of the peripheral wall of the glass body is not less than 2 mm.

[0010] Furthermore, the fitting portion is fixed to the outer surface of the peripheral wall of the glass body by gluing.

[0011] Furthermore, the cavity wall of the accommodating cavity is provided with a plurality of overflow glue grooves connected with the glue containing grooves, and the adhesive flowing from the glue containing grooves into the overflow glue grooves fixes the detection plate and the positioning plate together;

[0012] Alternatively, there is an interlayer space between the positioning plate and the detection plate, and a glue inlet hole communicating with the interlayer space is provided on the outer wall of the positioning plate, and glue is poured into the interlayer space through the glue inlet hole to encapsulate the detection plate.

[0013] Furthermore, a pressing portion for pressing the detection plate against the glass body is provided on the side of the positioning plate facing the detection plate, and an elastic member is provided between the pressing portion and the detection plate, and the pressing portion presses the detection plate through the elastic member.

[0014] Furthermore, after the positioning plate is fixed to the glass body, the detection plate is installed into the accommodating cavity through the opening;

[0015] Alternatively, the top of the positioning plate has a hooking portion hooked on the edge of the glass body, and the positioning plate is pre-positioned on the glass body through the hooking portion;

[0016] Alternatively, a cup seat is fixed to the bottom of the glass cup body, and the bottom of the positioning plate has a pre-positioning structure that matches the cup seat.

[0017] Furthermore, a shielding member covering the positioning plate is arranged on the outer side of the positioning plate.

[0018] Furthermore, the shielding member is a handle or an operating panel;

[0019] Alternatively, the shielding member is a cup body shell sleeved on the outside of the glass cup body;

[0020] Alternatively, after the glue filling process, the shielding member presses the positioning plate and is fixed to the outer side of the glass body.

[0021] Furthermore, the detection board includes a liquid level detection area with a capacitor electrode installed and a signal processing area with a processing chip installed, wherein after the detection board is installed in the accommodating cavity, the signal processing area is exposed to the positioning plate at the opening.

[0022] Most of the existing liquid heaters use tubular glass to make the cup body. Due to the fragility of the tubular glass material, it is impossible to set screw positions, buckle positions and other structures on the glass surface to fix the detection plate. Of course, fiberglass, tempered glass, bulletproof glass and the like with higher strength and thickness can meet the above requirements, but this type of glass material greatly increases the manufacturing cost. Moreover, the thickness of the glass is relatively thick, which also significantly increases the weight of the cup body, making it inconvenient for consumers to use and unable to achieve mass application. Based on this, the prior art generally uses glue to bond the soft detection plate, or fixes the detection plate by positioning the handle. However, the manufacturing cost of the soft detection plate is high, and the soft detection plate is easy to be damaged, which greatly increases the subsequent maintenance cost. And the positioning by the handle is easy to form assembly tolerance, causing the detection plate to be offset relative to the glass cup body, and the detection accuracy will also be reduced. Moreover, a positioning structure for positioning the handle is also provided on the glass cup body, which increases the manufacturing difficulty.

[0023] For the present application, the outer surface of the peripheral wall of the glass cup body is curved, and a positioning plate is fixed on the outer side of the peripheral wall of the glass cup body, and the positioning plate and the peripheral wall of the glass cup body enclose a receiving cavity for positioning the detection plate, and the detection plate can be conveniently pre-positioned and installed through the receiving cavity. In addition, one end of the positioning plate has an opening connected to the receiving cavity. Since a glue groove is formed between the detection plate and the peripheral wall of the glass cup body, after the detection plate is pre-positioned in the receiving cavity, a glue pouring process is used to pour glue into the glue groove through the opening. After a period of standing, the detection plate can be firmly fixed on the outer wall of the glass cup body, which effectively solves the problem of fixing a rigid detection plate on the outer wall of a curved glass cup body in the prior art. In addition, since the edge of the positioning plate is in close contact with the outer surface of the peripheral wall of the glass cup body, the glue is not easy to overflow from the gap between the positioning plate and the glass cup body during the glue pouring process. In addition, during the glue pouring process, the glue liquid only needs to be filled into the glue tank to fix the test board. Therefore, compared with the traditional glue pouring method of wrapping the entire test board as a whole, the technical solution of the utility model uses less glue pouring and can also achieve a better positioning and fixing effect of the test board. Moreover, the technical solution of the present application has lower manufacturing costs and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] Figure 1 This is a structural schematic diagram of a glass cup body of a first embodiment of a liquid heater of the utility model;

[0026] Figure 2 This is a schematic diagram of the installation structure of the detection board in Example 1;

[0027] Figure 3 for Figure 2Schematic diagram of the local section in the XX direction;

[0028] Figure 4 for Figure 2 The structural diagram of the middle positioning plate;

[0029] Figure 5 for Figure 2 The structural diagram of the detection board;

[0030] Figure 6 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the third embodiment of the liquid heater of the utility model;

[0032] Figure 8 for Figure 7 A schematic diagram of the enlarged structure at A in the middle;

[0033] Fig. 9 for Figure 7 Schematic diagram of the exploded installation structure of the detection board. DETAILED DESCRIPTION

[0034] Embodiment 1:

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The figure shows a partial structural diagram of a liquid heater of the utility model. The liquid heater is a health pot that can be used to brew beverages. It includes a glass cup body 1, the outer surface of the peripheral wall of the glass cup body 1 is a curved surface structure that bulges outward, and a positioning plate 2 is vertically installed on the outer side of the peripheral wall of the glass cup body 1, and the edge of the positioning plate 2 is tightly attached to the outer surface of the peripheral wall of the glass cup body 1 by gluing, and the positioning plate 2 and the peripheral wall of the glass cup body 1 are enclosed to form a receiving cavity 10, and one end of the positioning plate 2 has an opening 20 connected to the receiving cavity 10. In the present embodiment, a detection plate 3 is also installed on the peripheral wall of the glass cup body 1, and the detection plate 3 is located in the accommodating cavity 10. Since the peripheral wall of the glass cup body 1 is curved and the detection plate 3 is a rigid straight plate structure, after the detection plate 3 is installed in the accommodating cavity 10, the detection plate 3 is pressed against the glass cup body, and a glue groove 100 is formed between the detection plate 3 and the peripheral wall of the glass cup body 1. In the present embodiment, the glue groove 100 is formed between the two side edges of the detection plate 3 and the peripheral wall of the glass cup body 1. When the detection plate 3 is installed to the glass cup body 1, glue is poured into the glue groove 100 through the opening 20. After the glue groove 100 is filled with glue and left to stand for a period of time, the detection plate 3 will be located in the accommodating cavity 10 and fixed as a whole with the glass cup body 1 and the positioning plate 2.

[0036] In the present embodiment, the two side edges of the positioning plate 2 have a fitting portion 21 that is adapted to the outer surface of the peripheral wall of the glass cup body 1. Since the outer surface of the peripheral wall of the glass cup body 1 is curved, and the surface of the fitting portion 21 facing the glass cup body 1 is also adapted to the curved surface. In this way, when the positioning plate 2 is pasted to the outer surface of the peripheral wall of the glass cup body 1, a close fitting relationship will be formed. At the same time, located in the accommodating cavity 10, a plurality of overflow glue grooves 200 connected to the glue containing groove 100 are also provided on the cavity wall of the accommodating cavity 10. The glue that flows from the glue containing groove 100 into the overflow glue groove 200 will fix the detection plate 3 and the positioning plate 2 more securely. In the present embodiment, the plurality of overflow glue grooves 200 are mutually staggered and arranged on both sides of the detection plate 3, which can ensure that all parts of the detection plate 3 can be fixed to the positioning plate 2.

[0037] Moreover, in the present embodiment, the detection board 3 is installed on the outer wall of the glass cup body 1 for detecting the height of the liquid level in the glass cup body 1 in the air, so that there is no need to set a separate liquid level electrode in the glass cup body 1 for detection, which is not only convenient for users to clean, but also avoids directly setting a mounting structure on the glass cup body 1 for installing the liquid level electrode, which can greatly reduce the scrap rate of the glass cup body 1, improve the yield rate, and reduce the production cost of the product. In the present embodiment, a plurality of capacitor electrodes 31 are provided on the side of the detection board 3 facing the glass cup body 1, and the capacitor electrodes 31 form a liquid level detection area. At the same time, a signal processing area is provided on the other side of the detection board 3, and a processing chip (not shown in the figure) is installed on the signal processing area. The processing chip processes the capacitance value generated by each capacitor electrode 31 to obtain a liquid level signal, thereby realizing accurate detection of the liquid level.

[0038] Most of the existing liquid heaters use tubular glass to make the cup body. Due to the fragility of the tubular glass material, it is impossible to set screw positions, buckle positions and other structures on the glass surface to fix the detection plate. Of course, fiberglass, tempered glass, bulletproof glass and the like with higher strength and thickness can meet the above requirements, but this type of glass material greatly increases the manufacturing cost. Moreover, the thickness of the glass is relatively thick, which also significantly increases the weight of the cup body, making it inconvenient for consumers to use and unable to achieve mass application. Based on this, the prior art generally uses glue to bond the soft detection plate, or fixes the detection plate by positioning the handle. However, the manufacturing cost of the soft detection plate is high, and the soft detection plate is easy to be damaged, which greatly increases the subsequent maintenance cost. And the positioning by the handle is easy to form assembly tolerance, causing the detection plate to be offset relative to the glass cup body, and the detection accuracy will also be reduced. Moreover, a positioning structure for positioning the handle is also provided on the glass cup body, which increases the manufacturing difficulty.

[0039] As for the present embodiment, the outer surface of the peripheral wall of the glass cup body is curved, and a positioning plate is fixed on the outer side of the peripheral wall of the glass cup body, and the positioning plate and the peripheral wall of the glass cup body enclose a receiving cavity for positioning the detection plate, and the detection plate can be conveniently pre-positioned and installed through the receiving cavity. In addition, one end of the positioning plate has an opening connected to the receiving cavity. Since a glue groove is formed between the detection plate and the peripheral wall of the glass cup body, after the detection plate is pre-positioned in the receiving cavity, a glue pouring process is used to pour glue into the glue groove through the opening. After a period of standing, the detection plate can be firmly fixed on the outer wall of the glass cup body, which effectively solves the problem of fixing a rigid detection plate on the outer wall of a curved glass cup body in the prior art. In addition, since the edge of the positioning plate is in close contact with the outer surface of the peripheral wall of the glass cup body, the glue is not easy to overflow from the gap between the positioning plate and the glass cup body during the glue pouring process. In addition, during the glue pouring process, the glue liquid only needs to be filled into the glue holding groove to fix the test board. Therefore, compared with the traditional glue pouring method of wrapping the entire test board as a whole, the technical solution of this embodiment uses less glue pouring and can also achieve a better positioning and fixing effect of the test board. Moreover, the technical solution of this embodiment has lower manufacturing costs and higher production efficiency.

[0040] It should be noted that, in this embodiment, the positioning plate is fixed to the outer surface of the peripheral wall of the glass body by means of glue. Of course, the fitting installation method of the positioning plate and the glass body is not limited to gluing. The positioning plate can also be pressed against the outer wall of the glass body by means of press-fitting of other components. In addition, in this embodiment, the purpose of fitting the positioning plate to the glass body is to prevent the glue from overflowing from the gap between the positioning plate and the glass body during the glue filling process. The inventors have found through research that the fitting width D between the positioning plate and the glass body is generally required to be no less than 2 mm (e.g. Figure 3 As shown), the fitting part and the glass body can form a face-to-face fitting relationship, wherein the fitting width D can also be understood as the fitting arc length of the cross section below and the surface. In addition, for this embodiment, the detection plate can be pre-positioned on the positioning plate first, and then fixed to the glass body together with the positioning plate, or the positioning plate can be fixed to the glass body first, and then the detection plate is loaded into the accommodating cavity through the opening, and after the detection plate is loaded into the accommodating cavity, the upper end of the detection plate is against the upper end wall of the accommodating cavity, and the detection plate is considered to be installed in place. At this time, the signal processing area on the detection plate will be exposed to the positioning plate at the opening, and then the glue filling process will be performed through the opening. For this embodiment, the opening can also be set at the upper end of the positioning plate, and the detection plate is loaded into the accommodating cavity through the upper end opening of the positioning plate. Of course, the detection plate can be set to be exposed to the positioning plate as needed, or it can be set to be not exposed.

[0041] At the same time, in this embodiment, the positioning plate is the positioning base for the detection plate to be accurately positioned on the outer wall of the glass body. Therefore, during the installation process, it is necessary to ensure that the positioning plate can be accurately positioned on the glass body. In this embodiment, it is necessary to use tooling, take the upper end of the glass mouth or the lower end of the glass body as the positioning reference, and then glue the positioning plate to the outer wall of the glass body.

[0042] It should also be noted that the detection board of this embodiment can detect both water level signals and anti-overflow signals, and a plurality of capacitor electrodes can be provided on the detection board for anti-overflow detection. Moreover, for this embodiment, the above structural changes can also be applied to other embodiments of the utility model.

[0043] Embodiment 2:

[0044] like Figure 6 As shown, it is the second embodiment of the utility model. The difference between this embodiment and the first embodiment is that the outer surface of the peripheral wall of the glass cup body 1 is a curved surface concave toward the center of the glass cup body 1, the detection plate 3 is located in the accommodating cavity and pressed against the peripheral wall of the glass cup body 1, and the horizontal cross-section of the glue containing groove 100 is crescent-shaped.

[0045] At the same time, the positioning plate 2 is provided with a holding portion 22 on the side facing the detection plate 3 for pressing the detection plate 3 against the glass body 1, and an elastic member 4 is provided between the holding portion 22 and the detection plate 3, and the holding portion 22 presses the detection plate 3 against the glass body 1 through the elastic member 4. In this embodiment, the elastic member 4 is an elastic silicone pad or a rubber member.

[0046] In addition, there is an interlayer space 30 between the positioning plate 2 and the detection plate 3, and a glue inlet hole 23 connected to the interlayer space 30 is provided on the outer wall of the positioning plate 2. When the detection plate 3 is installed, glue is poured into the crescent-shaped glue groove 100 through an opening (not shown in the figure), and glue is also poured into the interlayer space 30 through the glue inlet hole 23 to encapsulate the detection board 3. After the glue pouring is completed, after standing for a period of time, the detection plate 3 can be fixed to the positioning plate 2 and the glass cup body 1, and the waterproof sealing of the detection board 3 can also be achieved.

[0047] It should be noted that, for this embodiment, the fixing and sealing of the detection board can be performed by two times of glue pouring, and the order of the two times of glue pouring is not limited. Of course, if this embodiment adopts the method of embodiment 1, and a glue overflow groove is set on the cavity wall of the accommodating cavity, the method of embodiment 1 can also be adopted, and glue pouring can be performed only on the opening.

[0048] Meanwhile, the positioning plate of this embodiment can be designed as a plate-mounted structure or a hollow bracket structure. This embodiment has the same beneficial effects as the first embodiment, which will not be described in detail here.

[0049] It should also be noted that the above structural changes to this embodiment can also be applied to other embodiments of the utility model.

[0050] Embodiment three:

[0051] like Figure 7 , Figure 8 , Fig. 9 The figure is a schematic diagram of the structure of the third embodiment of the utility model. The liquid heater of this embodiment is a food processing machine. For this embodiment, the detection plate 3 is also positioned on the outer wall of the glass body 1 through the positioning plate 2, wherein the top of the positioning plate 2 has a hook portion 24 hooked on the edge of the glass body 1, and the positioning plate 2 is pre-positioned on the glass body 1 through the hook portion 24. At the same time, the outer side of the positioning plate 2 is also provided with a shielding member covering the positioning plate 2. In this embodiment, the shielding member is a handle 5 that hides the positioning plate 2.

[0052] In this embodiment, the positioning plate is first positioned on the outer wall of the glass body through the hook part, and then the detection plate is installed in the accommodating cavity enclosed by the positioning plate and the glass body, and the glue groove is filled with glue to fix the detection plate. After the glue is filled, the handle is fixed on the outside of the glass body. Of course, after the glue filling process, the positioning plate can also be auxiliary pressed with the handle to prevent the positioning plate from falling off.

[0053] It should be noted that, for this embodiment, the shielding member is not limited to the handle disclosed in this embodiment, and the shielding member may also be a shell fixed to the outer wall of the glass cup body, the shell hiding the positioning plate, and the shell may also be an operation panel for controlling the food processor. Alternatively, the shielding member may also be a cup body shell mounted on the outer side of the glass cup body, so that the food processor has a double-layer cup structure.

[0054] In addition, for this embodiment, the positioning plate is fixed to the outside of the glass cup body by hooking for pre-positioning. The pre-positioning structure of the positioning plate is not limited to hooking. For example, a cup seat is fixed at the bottom of the glass cup body, and the lower end of the positioning plate can also be pre-positioned on the cup seat to achieve pre-positioning of the positioning plate and the glass cup body before installing the detection plate.

[0055] Similarly, this embodiment has the same beneficial effects as the above embodiments, and this embodiment will not be described in detail. It should be noted that the above structural changes of this embodiment can also be applied to other embodiments of the utility model.

[0056] In addition, it should be noted that the liquid heater of the utility model is not limited to the food processor with integrated motor and cup body disclosed in the embodiment of the utility model, but can also be a soymilk machine with motor mounted on top, a wall-breaking machine with cup body and machine base separated, and a food processor that can realize automatic pulp discharge and automatic cleaning without hand washing. Moreover, the liquid heater of the utility model can also be applied to heating appliances for beverage production such as pulp boiling operation and rice paste making, such as health pots, health pots, etc.

[0057] Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A liquid heater for detecting liquid level in the air, comprising a glass body and a strip-shaped detection plate for detecting liquid level in the air, wherein the detection plate is vertically mounted on the peripheral wall of the glass body, and is characterized in that: The outer surface of the peripheral wall of the glass cup body is curved, and a positioning plate is fixed to the outer side of the peripheral wall of the glass cup body, the edge of the positioning plate is tightly attached to the outer surface of the peripheral wall of the glass cup body, and the positioning plate and the peripheral wall of the glass cup body are combined to form a accommodating cavity for positioning the detection plate, and one end of the positioning plate has an opening connected to the accommodating cavity, and a glue containing groove is formed between the detection plate and the peripheral wall of the glass cup body, and glue is poured into the glue containing groove through the opening to fix the detection board.

2. The liquid heater for detecting liquid level in the air according to claim 1, characterized in that: The outer surface of the peripheral wall of the glass cup body is a curved surface convex outward, the detection plate is located in the accommodating cavity and pressed against the peripheral wall of the glass cup body, and the glue groove is formed between the two side edges of the detection plate and the peripheral wall of the glass cup body; or, the outer surface of the peripheral wall of the glass cup body is a curved surface concave toward the center of the glass cup body, the detection plate is located in the accommodating cavity and pressed against the peripheral wall of the glass cup body, and the horizontal cross-section of the glue groove is crescent-shaped.

3. The liquid heater for remotely detecting liquid level according to claim 1, characterized in that: The edge of the positioning plate has a fitting portion protruding toward the glass body and matching with the outer surface of the peripheral wall of the glass body, wherein the fitting width between the fitting portion and the outer surface of the peripheral wall of the glass body is not less than 2 mm.

4. The liquid heater for remotely detecting liquid level according to claim 3, characterized in that: The fitting portion is fixed to the outer surface of the peripheral wall of the glass cup body by gluing.

5. The liquid heater for remotely detecting liquid level according to claim 1, characterized in that: The cavity wall of the accommodating cavity is provided with a plurality of overflow glue grooves connected with the glue containing grooves, and the adhesive flowing from the glue containing grooves into the overflow glue grooves fixes the detection plate and the positioning plate together; Alternatively, there is an interlayer space between the positioning plate and the detection plate, and a glue inlet hole communicating with the interlayer space is provided on the outer wall of the positioning plate, and glue is poured into the interlayer space through the glue inlet hole to encapsulate the detection plate.

6. The liquid heater for remotely detecting liquid level according to claim 1, characterized in that: A pressing portion for pressing the detection plate against the glass body is arranged on one side of the positioning plate facing the detection plate, and an elastic member is arranged between the pressing portion and the detection plate, and the pressing portion presses the detection plate through the elastic member.

7. The liquid heater for remotely detecting liquid level according to claim 1, characterized in that: After the positioning plate is fixed to the glass body, the detection plate is installed into the accommodating cavity through the opening; Alternatively, the top of the positioning plate has a hooking portion hooked on the edge of the glass body, and the positioning plate is pre-positioned on the glass body through the hooking portion; Alternatively, a cup seat is fixed to the bottom of the glass cup body, and the bottom of the positioning plate has a pre-positioning structure that matches the cup seat.

8. The liquid heater for remotely detecting liquid level according to claim 1, characterized in that: A shielding member covering the positioning plate is arranged on the outer side of the positioning plate.

9. The liquid heater for remotely detecting liquid level according to claim 8, characterized in that: The shielding member is a handle or an operating panel; Alternatively, the shielding member is a cup body shell sleeved on the outside of the glass cup body; Alternatively, after the glue filling process, the shielding member presses the positioning plate and is fixed to the outer side of the glass body.

10. The liquid heater for remotely detecting liquid level according to claim 1, characterized in that: The detection board includes a liquid level detection area with a capacitor electrode installed and a signal processing area with a processing chip installed, wherein after the detection board is installed in the accommodating cavity, the signal processing area is exposed to the positioning plate at the opening.

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