Liquid heater reliable in detection

Abstract

The utility model belongs to the technical field of household appliances, and discloses a reliable-detection liquid heater which comprises a glass cup body, a detection plate used for detecting the height of the liquid level in the glass cup body, a temperature measuring element, a heating piece and a control device. The detection plate is provided with a first interface and a second interface, the first interface is connected with the temperature measuring element, and the second interface is connected with the control device. The detection board is provided with the first interface and the second interface, so that the structure and function integration of the detection board is realized, correspondingly, an interface can be integrated on the main control board in the control device to input a temperature signal and a liquid level signal, the wiring harness connection is optimized, the wiring harness is prevented from being long, the wiring harness winding and detection interference are reduced, and the detection accuracy is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and in particular relates to a liquid heater with reliable detection. Background Art

[0002] Existing liquid heating devices can usually realize remote liquid level detection. For example, the patent application with application number 201720526032.4 discloses a food processor with good anti-overflow effect, including a base with a built-in motor and a mixing cup arranged above the base. The mixing cup includes a glass cup with a handle and a water level detection structure arranged on the outer side of the glass cup. The water level detection structure includes a detection component fitted on the outer wall of the glass cup and a capacitive sensing board connected to the detection component. The sensing board is generally provided with a processing chip, which collects liquid level signals and connects to the main control board to realize remote liquid level detection and related control, which is convenient for cleaning and has a high degree of intelligence.

[0003] Usually food processors also need to perform temperature detection. A temperature sensor is used to detect the temperature of the liquid in the cup and connect it to the main control board to process the temperature signal and perform related control to achieve sufficient cooking while avoiding heating power loss.

[0004] However, the existing capacitive sensing board only transmits and processes the liquid level signal, with a low degree of integration and a single function. The existing main control board must be provided with an interface for connecting to the temperature sensor and an interface for connecting to the sensing board, and a processing chip for processing the temperature signal is separately provided on the main control board, which has a low degree of integration, resulting in a complex structure of the main control board and numerous connecting harnesses.

[0005] Especially in some machine head type food processors, since the main control board and the temperature sensor are respectively installed on the machine head and the cup body, and connected through a coupler between the cup body and the machine head, the existing connection method makes the coupler structure complicated, the cost increased, the size of the coupler increased accordingly, and the assembly is difficult. Utility Model Content

[0006] The utility model provides a liquid heater with reliable detection, which solves the technical problem that the detection board in the existing liquid heater has a low integration level and causes the detection board to have a single function, and realizes the compatible transmission of temperature signals while realizing remote liquid level detection by using the detection board.

[0007] The technical solution adopted by the utility model is:

[0008] The utility model provides a liquid heater with reliable detection, comprising a glass body, a detection plate for detecting the liquid level height in the glass body, a temperature measuring element, a heating element and a control device, wherein the detection plate is strip-shaped and vertically fixed to the outer wall of the glass body, and the detection plate is provided with a first interface and a second interface, the first interface is connected to the temperature measuring element, and the second interface is connected to the control device.

[0009] The liquid heater provided by the utility model is provided with a detection plate, which is strip-shaped and vertically fixed to the outer wall of the glass cup body, so as to detect the liquid level in the cup body in the air, realize anti-overflow detection or water level detection, and the detection is reliable and avoids the inconvenience of cleaning caused by contact with slurry, which is convenient for users to use. By setting a first interface and a second interface on the detection plate, the first interface is connected to the temperature measuring element, so that the temperature signal detected by the temperature measuring element such as the temperature sensor can be transmitted through the first interface, and then transmitted to the control device through the second interface, the second interface is compatible with the output of the liquid level signal and the temperature signal, and the detection plate realizes the transmission of the temperature signal. When the detection plate has a processing chip, the detection plate can also realize the compatible processing of the temperature signal and the liquid level signal, and realize the structural and functional integration of the detection plate. Correspondingly, an interface can be integrated on the main control board in the control device to input the temperature signal and the liquid level signal, simplify the structure of the main control board, simplify the overall wiring harness, realize wiring optimization, avoid long wiring harnesses, reduce wiring harness winding and detection interference, reduce costs, and improve detection accuracy.

[0010] In a preferred embodiment, the front side of the detection board faces the glass cup body and is provided with a capacitor electrode, the back side of the detection board is provided with a processing chip, the processing chip is connected to the capacitor electrode, the first interface is connected to the processing chip, and the control device includes a main control board connected to the second interface.

[0011] By arranging a capacitor electrode on the front side of the detection board, the capacitance of the capacitor electrode changes with the volume of the liquid in the glass cup body, thereby realizing remote liquid level detection without contacting the liquid; by arranging a processing chip on the back side of the detection board, the processing chip is connected to the capacitor electrode, and at the same time, it is beneficial to reliably fit the front side of the detection board to the glass cup body to ensure detection sensitivity; the first interface is connected to the processing chip, and when the temperature measuring element adopts a temperature sensor, the processing chip is compatible with collecting and processing temperature signals and capacitance signals of the capacitor electrode, and the second interface is compatible with transmitting temperature signals and capacitance signals of the capacitor electrode. The detection board has high functional integration, realizes the transmission and processing of multiple signals, the overall structure of the control device is simple, and the detection and control are reliable.

[0012] In a preferred embodiment, the control device includes a main control board, a processing chip is arranged on the main control board, the detection board is provided with a capacitor electrode, and the main control board is connected to the second interface so that the capacitor electrode is connected to the processing chip.

[0013] By setting the processing chip on the main control board, the processing chip is used to process the liquid level signal of the detection board. When the temperature measuring element adopts a temperature sensor, the processing chip processes the temperature signal at the same time. The functions of the main control board are integrated. At the same time, the detection board is only used for compatible transmission of temperature signals and liquid level signals, which simplifies the structure of the detection board, helps to reduce the volume of the detection board, and facilitates assembly.

[0014] In a preferred embodiment, the detection board is provided with a first terminal seat and a second terminal seat which are arranged in parallel in a transverse direction, and the first interface and the second interface are respectively arranged at the first terminal seat and the second terminal seat.

[0015] By arranging the first interface and the second interface in parallel horizontally on the back of the detection board through the first terminal seat and the second terminal seat, the first interface and the second interface are independent and compactly arranged, which effectively avoids interference between different signals during transmission. The overall structure of the detection board is compact. In the process of fixed installation of the detection board, it is easier to limit and avoid the wiring harness, avoid clustering of the wiring harness, optimize the layout of the wiring harness, facilitate overall assembly, and reduce costs.

[0016] In a preferred embodiment, the detection board is provided with a third terminal seat, and the first interface and the second interface are both provided at the third terminal seat.

[0017] By setting a third terminal seat on the detection board, the first interface and the second interface are both set on the third terminal seat, so that the first interface and the second interface can be further arranged in a compact manner, saving the number of terminal seats, saving the space occupied by the detection board, reducing the volume of the detection board, and facilitating the fixing and installation of the detection board.

[0018] In a preferred embodiment, the second interface includes an input terminal and an output terminal arranged on the same terminal seat.

[0019] By making the second interface include an input terminal and an output terminal arranged on the same terminal seat, serial port two-wire communication is realized, so that the signal transmission speed and reliability between the detection board and the control device are improved.

[0020] In a preferred embodiment, the temperature measuring element is a temperature sensor extending into the glass body;

[0021] Alternatively, the temperature measuring element is a thermal protection element.

[0022] By using a temperature sensor as a temperature measuring element, the temperature sensor and the first interface of the detection board are connected, and the detection board is compatible with the transmission of temperature signals and liquid level signals, with integrated functions. When the detection board is provided with a processing chip, the detection board is further compatible with the processing of temperature signals and liquid level signals, with a high degree of integration, optimized wiring harness layout, and reduced costs.

[0023] The temperature element adopts a thermal protection element, and the thermal protection element is connected to the first interface of the detection board. There is no need to set up another interface on the main control board of the control device, which simplifies the structure and optimizes the wiring harness connection.

[0024] In a preferred embodiment, the heating element is a heating plate fixed to the bottom of the glass body or a heating film arranged on the outer wall of the glass body, and the first interface is located at one end of the detection plate close to the temperature measuring element.

[0025] A heating plate is used to directly heat the glass cup body, and the heating efficiency is high. The temperature measuring element is preferably a temperature sensor that penetrates the heating plate and extends into the glass cup body. Temperature detection and temperature control are more direct and the detection is accurate. The temperature sensor and the detection board are respectively located at the bottom and side of the glass cup body. The first interface is located at one end of the detection board close to the temperature measuring element, that is, the first interface is arranged below the capacitor electrode on the detection board. Compared with the situation where the first interface is located above the capacitor electrode, the first interface is closer to the temperature sensor, shortening the connecting wire harness between the two, improving the accuracy of signal transmission, and the functions of the detection board are integrated and reliable.

[0026] By using a heating film to heat the glass cup body, three-dimensional circulation heating is achieved, with high heating efficiency and good boiling effect. Since the detection plate and the heating film are both located on the side of the glass cup body, the detection plate and the heating film are separated to avoid direct heat transfer from the heating film to the detection plate, and reduce the influence of the metal structure in the heating film on the detection accuracy of the detection plate. The temperature measuring element can be optionally a thermal protection element abutting the outside of the heating film, and the first interface is set at one end of the detection board close to the thermal protection element, so that the connection harness between the first interface and the temperature measuring element can be shortened, the accuracy of signal transmission is improved, and unnecessary material waste is avoided. The functions of the detection board are integrated and reliable.

[0027] Whether using a heating plate or a heating film, the temperature measuring element can be indirectly installed on the bottom of the glass cup body through the heating plate or fixed on the side of the glass cup body through the heating film. The temperature measuring element is installed on the glass cup body. The temperature measuring element and the glass cup body form an integrated component. For traditional head-type soymilk machines, the temperature measuring element is installed on the head instead of the cup body. There is no need to transmit the temperature signal separately through the coupler, which is conducive to reducing the size of the coupler and reducing the risk of signal instability and detection failure caused by water ingress into the coupler.

[0028] In a preferred embodiment, the liquid heater also includes a host that is detachably matched with the glass cup body, the control device includes a main control board arranged in the host, a coupler is arranged between the glass cup body and the host, and the second interface and the main control board are communicatively connected via the coupler.

[0029] In a preferred embodiment, the host is a machine head installed at the mouth of the glass cup body, and a motor connected to the main control board is also provided in the machine head, and the rotating shaft of the motor passes through the machine head and is connected to a crushing knife, and the crushing knife extends into the glass cup body;

[0030] In a preferred embodiment, the main machine is a base supported under the glass cup body, and a motor connected to the main control board is also provided in the base. A crushing knife is provided at the bottom of the glass cup body, and the rotating shaft of the motor is transmission-connected to the crushing knife.

[0031] The host of the liquid heater can be selected as a head or a base. For a head-type liquid heater, such as a traditional soymilk maker, since the temperature measuring element and the first interface of the detection board are connected, the coupler does not need to transmit the temperature signal separately, but only needs to connect the second interface and the main control board to achieve compatible transmission of temperature signals and liquid level signals, simplify the layout of the wiring harness, and achieve more accurate temperature and liquid level detection.

[0032] The main unit of the liquid heater can also be a machine base, such as a wall-breaking machine, a health pot, a water kettle, etc. with a bottom-mounted motor. While expanding a variety of machine models, it also realizes the integration of the detection board, simplifies the control device, simplifies the connection harness layout, achieves more accurate temperature and liquid level detection, and has a reliable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0034] Figure 1 This is a schematic diagram of the structure of the liquid heater in Example 1 of the present utility model;

[0035] Figure 2 This is a schematic diagram of the back structure of the detection board in Example 1 of the present utility model;

[0036] Figure 3 This is a schematic diagram of the front structure of the detection board in Example 1 of the present utility model;

[0037] Figure 4 This is a schematic diagram of the structure of the liquid heater in Example 2 of the present utility model;

[0038] Figure 5 This is a circuit connection diagram of the liquid heater in Example 1 of the implementation example 1 of the utility model;

[0039] Figure 6 This is a circuit connection diagram of the liquid heater in Example 2 of Example 1 of the present utility model;

[0040] Figure 7 This is a circuit connection diagram of the liquid heater in Example 3 of Example 1 of the present utility model;

[0041] Figure 8 This is a circuit connection diagram of the liquid heater in Example 4 of Example 1 of the present utility model;

[0042] Fig. 9 This is a schematic diagram of the interface connection structure of the detection board in Example 1 of the present utility model.

[0043] Description of reference numerals:

[0044] 10. Glass cup body; 20. Detection board; 21. First interface; 22. Second interface; 23. Capacitor electrode; 231. Water level capacitor electrode; 232. Anti-overflow capacitor electrode; 30. Temperature sensor; 40. Heating element; 50. Processing chip; 60. Host; 70. Motor; 80. Crushing knife. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present invention and the features in each embodiment may be combined with each other without conflict.

[0047] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0050] like Figure 1-3 As shown, the utility model provides a liquid heater with reliable detection in implementation example 1, including a glass cup body 10, a detection plate 20 for detecting the liquid level height in the glass cup body 10, a temperature measuring element, a heating element 40 and a control device. The detection plate 20 is strip-shaped and vertically fixed to the outer wall of the glass cup body 10. The detection plate 20 is provided with a first interface 21 and a second interface 22. The first interface 21 is connected to the temperature measuring element, and the second interface 22 is connected to the control device.

[0051] It should be noted that the temperature measuring element in the present invention can be selected as a temperature sensor 30 for directly or indirectly detecting the temperature inside the glass or a thermal protection element for overheating protection, such as a fuse or a thermostat. Preferably, in implementation example 1, the temperature measuring element is a temperature sensor 30.

[0052] Preferably, in implementation example 1, the liquid heater further comprises a host 60 detachably matched with the glass body 10, the control device comprises a main control board arranged in the host 60, a coupler is arranged between the glass body 10 and the host 60, and the second interface 22 and the main control board are connected in communication via the coupler. Specifically, the host 60 is a head mounted at the mouth of the glass body 10, and a motor 70 connected to the main control board is also arranged in the head, the rotating shaft of the motor 70 passes through the head and is connected to the crushing knife 80, and the crushing knife 80 extends into the glass body 10.

[0053] The liquid heater provided by the utility model is provided with a detection plate 20, which is strip-shaped and vertically fixed on the outer wall of the glass cup body 10, so as to detect the liquid level in the cup body in the air, realize overflow prevention detection or water level detection, and the detection is reliable and avoids the inconvenience of cleaning caused by contact with slurry, which is convenient for users to use. By setting a first interface 21 and a second interface 22 on the detection plate 20, the first interface 21 is connected to the temperature sensor 30, so that the temperature signal detected by the temperature sensor 30 can be transmitted through the first interface 21, and then transmitted to the control device through the second interface 22, and the second interface 22 is compatible with the output of the liquid level signal and the temperature signal, so as to realize the structural and functional integration of the detection plate 20. Correspondingly, an interface can be integrated on the main control board in the control device to input the temperature signal and the liquid level signal, simplifying the structure of the main control board, simplifying the overall wiring harness, avoiding a long wiring harness, reducing wiring harness winding and detection interference, and improving the accuracy of detection.

[0054] Preferably, in implementation example 1, the front side of the detection board 20 faces the glass cup body 10 and is provided with a capacitor electrode 23 , the back side of the detection board 20 is provided with a processing chip 50 , the processing chip 50 is connected to the capacitor electrode 23 , and the first interface 21 is connected to the processing chip 50 .

[0055] By setting a capacitor electrode 23 on the front side of the detection board 20, the capacitance of the capacitor electrode 23 changes with the volume of the liquid in the glass cup body 10, and the remote liquid level detection is realized without the need for contact with the liquid. The control device includes a processing chip, and the processing chip is installed on the back side of the detection board 20 and connected to the capacitor electrode 23. At the same time, it is conducive to reliably fitting the front side of the detection board 20 to the glass cup body 10 to ensure the detection sensitivity. The first interface 21 is connected to the processing chip, so that the processing chip is compatible with processing the temperature signal of the temperature sensor 30 and the capacitance signal of the capacitor electrode 23, and the second interface 22 is compatible with transmitting the temperature signal and the capacitance signal of the capacitor electrode 23. The detection board 20 has high functional integration, the overall structure of the control device is simple, and the detection and control are reliable.

[0056] Of course, as another preferred implementation example of the utility model, the control device includes a main control board, and the main control board is arranged in the host 60. A processing chip is arranged on the main control board, and the detection board is provided with a capacitor electrode. The main control board is connected to the second interface so that the capacitor electrode is connected to the processing chip. With such a configuration, the detection board 20 is only used for compatible transmission of temperature signals and liquid level signals, which simplifies the structure of the detection board 20, helps to reduce the volume of the detection board 20, and facilitates assembly. By arranging the processing chip on the main control board, the processing chip is used to process the liquid level signal of the detection board 20 and the temperature signal of the temperature sensor 30, and the functions are diverse and integrated.

[0057] In the present invention, the capacitor electrode 23 can be any one or more of a water level capacitor electrode 231, an anti-overflow capacitor electrode 232, and a cup lid capacitor electrode for lid closing detection. For example, in implementation example 1, the front of the detection board 20 is provided with a water level detection area and an anti-overflow detection area located above the water level detection area, and the capacitor electrode 23 includes a plurality of water level capacitor electrodes 231 located in the water level detection area and a plurality of anti-overflow capacitor electrodes 232 located in the anti-overflow detection area.

[0058] When the capacitor electrode 23 includes three types of capacitor electrode 231 for water level, capacitor electrode 232 for anti-overflow, and capacitor electrode for cup cover, the integration of the detection board 20 is further realized. Of course, in fact, the capacitor electrode 23 can also be used only for detecting the liquid level, and a third interface is set on the detection board 20, and the cup cover is detected by a Hall element or a reed switch, and the Hall element or the reed switch detection is connected to the third interface, so as to realize the integration of multiple detection functions of the detection board 20.

[0059] As a preferred implementation, as in implementation example 1, Figure 2 As shown, the detection board is provided with a first terminal seat and a second terminal seat arranged in parallel in a transverse manner, and the first interface and the second interface are respectively provided at the first terminal seat and the second terminal seat. The temperature measuring element is provided with a plug connector that is plugged and matched with the first terminal seat.

[0060] By arranging the first interface 21 and the second interface 22 horizontally and side by side on the back of the detection board 20, the first interface 21 and the second interface 22 are independent and compactly arranged, which effectively avoids interference between different signals during transmission. The overall structure of the detection board 20 is compact. In the process of fixing and installing the detection board 20, it is easier to limit and avoid the wiring harness, which facilitates the overall assembly.

[0061] Of course, it should be noted that, in other embodiments, the first interface 21 is also a soldering point provided on the detection board 20, and a temperature measuring element such as a temperature sensor 30 is soldered to the soldering point through a wire to achieve a fixed electrical connection between the first interface 21 and the temperature sensor 30. It is understandable that the structure of the second interface 22 can also be any one of a plug-in interface and a soldering point.

[0062] In another preferred embodiment, a third terminal seat is provided on the back side of the detection board 20, and the first interface 21 and the second interface 22 are both on the same third terminal seat.

[0063] By setting a third terminal seat on the back side of the detection board 20, the first interface 21 and the second interface 22 are both on the same terminal seat, so that the first interface 21 and the second interface 22 can be further compactly arranged, saving the number of terminal seats, saving the space occupied by the detection board 20, reducing the volume of the detection board 20, and facilitating the fixing and installation of the detection board 20.

[0064] In a preferred embodiment, the second interface 22 includes an input terminal and an output terminal arranged on the same terminal seat, and the input terminal and the output terminal are arranged in parallel horizontally. By setting the second interface 22 as an input terminal and an output terminal, serial port two-wire communication is realized, so that the signal transmission speed and reliability between the detection board 20 and the control device are improved. The input terminal and the output terminal are arranged in parallel horizontally, which is conducive to the compact structure of the detection board 20. Of course, in fact, in other implementation examples, the second interface 22 can also be a single-line communication interface to simplify the arrangement of the wiring harness.

[0065] Specifically, in combination with the machine head type liquid heater provided in Implementation Example 1, the control device includes a main control board arranged in the machine head, a motor 70 connected to the main control board is arranged in the machine head, and a coupler is arranged between the machine head and the cup body. An opening is arranged at the lower end of the glass cup body 10, the heating element 40 is a heating plate fixed to the bottom of the glass cup body 10 to close the opening, the temperature sensor 30 passes through the heating plate and extends into the glass cup body 10, the front of the detection board 20 faces the glass cup body 10 and is provided with a capacitor electrode 23, and the first interface 21 is located below the capacitor electrode 23. For different structures of the second interface 22, the connection method between the main control board and the detection board 20 is different, and the connection method of the whole machine circuit can be selected from any of the following embodiments:

[0066] Embodiment 1, as Figure 5 As shown, the main control board adopts an isolation switch power supply mode and adopts a serial port two-wire communication. The detection board 20 is an air-isolated anti-overflow detection board 20.

[0067] The host 60 includes a main control board and a motor 70. The main control board is connected to the motor 70 at two ends DJ+ and DJ-. The main control board is configured with RG+ and RG- at two ends of the heating plate, RXD and TXD at two ends of the serial communication (connected to the second interface of the detection board 20), and the power supply VCC and GND are connected to the six-pin coupler;

[0068] The cup body part includes an air-spaced anti-overflow detection board 20, a heating plate and a temperature sensor 30 arranged on the glass cup body 10. The first interface NTC and GND on the air-spaced anti-overflow detection board 20 are connected to the temperature sensor 30, the heating plate is connected to the two ends RG+ and RG- of the six-pin coupler, the air-spaced anti-overflow detection board 20 is connected to the two ends RXD and TXD of the serial communication of the six-pin coupler and the power supply VCC and GND, and the ground wire of the heating plate and the power ground of the detection board 20 use a common ground GND.

[0069] Embodiment 2, as Figure 6 As shown, the main control board adopts an isolated switch power supply mode and a single-line communication mode. The detection board 20 is an isolated anti-overflow detection board 20.

[0070] The host 60 includes a main control board and a motor 70. The main control board is connected to the motor 70 at two ends DJ+ and DJ-. The main control board is equipped with RG+ and RG- at two ends of the heating plate, a single-line communication interface S IN (connected to the second interface of the detection board 20), and the power supply VCC and GND are connected to a five-pin coupler.

[0071] The cup body part includes an air-spaced anti-overflow detection board 20, a heating plate and a temperature sensor 30 arranged on the glass cup body 10. The first interface NTC and GND on the air-spaced anti-overflow detection board 20 are connected to the temperature sensor 30. The heating plate of the cup body part is connected to the two ends RG+ and RG- of the five-pin coupler. The air-spaced anti-overflow detection board 20 is connected to the single-wire communication interface SI N of the five-pin coupler and the power supply VCC and GND. The ground wire of the heating plate and the power ground of the air-spaced anti-overflow detection board 20 use a common ground GND.

[0072] Embodiment 3, as Figure 7 As shown, the main control board adopts a non-isolated switch power supply mode and a serial communication mode. The detection board 20 is an air-isolated anti-overflow detection board 20.

[0073] The host 60 includes a main control board and a motor 70. The main control board is connected to the motor 70 at two ends DJ+ and DJ-. The main control board is configured with two ends RG+ and RG- of the heating plate and a ground GND. Two ends RXD and TXD of the serial communication, and the power supply VCC and PGND are connected to a seven-pin coupler.

[0074] The cup body part includes an air-spaced anti-overflow detection board 20, a heating plate and a temperature sensor 30 arranged on the glass cup body 10. The air-spaced anti-overflow detection board 20 and the temperature sensor 30 interfaces NTC and PGND are connected to the temperature sensor 30. The heating plate of the cup body part is connected to the two ends RG+, RG- of the seven-pin coupler and the ground GND. The air-spaced anti-overflow detection board 20 is connected to the two ends RXD, TXD of the serial communication of the seven-pin coupler and the power supply VCC, PGND.

[0075] Embodiment 4, as Figure 8 As shown, the main control board adopts a non-isolated switch power supply mode and a single-line communication mode. The detection board 20 is an air-isolated anti-overflow detection board 20.

[0076] The host 60 is configured with a main control board and a motor 70. The main control board is connected to the motor 70 at two ends DJ+ and DJ-. The main control board is configured with the heating plate at two ends RG+ and RG- and ground GND, a single-line communication interface S IN, and power supplies VCC and PGND are connected to a six-pin coupler.

[0077] The cup body is equipped with an air-isolated overflow prevention detection board 20, a heating plate and a temperature sensor 30. The air-isolated overflow prevention detection board 20 and the temperature sensor 30 interfaces NTC and PGND are connected to the temperature sensor 30. The heating plate of the cup body is connected to the two ends RG+, RG- and the ground GND of the six-pin coupler. The air-isolated overflow prevention detection board 20 is connected to the single-wire communication interface S IN of the six-pin coupler and the power supply VCC and PGND.

[0078] The embodiment provided in the utility model is compatible with pulp temperature, anti-overflow and other signal detection methods through the air-spaced anti-overflow detection board 20. Different coupler pin numbers are configured according to different communication methods and switching power supply methods, which effectively reduces the number of coupler pins, reduces the size accordingly, and reduces costs. It is beneficial to the shape and assembly of the whole machine. The air-spaced anti-overflow detection board 20 and the main control are connected through a coupler. The air-spaced anti-overflow board and the main control adopt a communication method to control the processing to reduce the influence on the accuracy of signal detection when there is condensed water or impurities on the coupler, reduce the risks of abnormal alarms or overflow during pulping, and improve user experience.

[0079] like Fig. 9 As shown, based on different types of communication methods, 5 pin interface terminals are uniformly configured on the air-space overflow prevention detection board 20. Fig. 9 In the embodiment, the temperature sensor interface is the first interface 21, and the communication interface is the second interface 22. Based on different types of communication methods, the air-spaced anti-overflow detection board 20 adopts the same communication pin layout to be compatible with different types of models, thereby improving the standardization of circuit boards and reducing costs.

[0080] The liquid heater provided by the present utility model is not limited to the liquid heater structure in the above-mentioned embodiment 1, for example:

[0081] In implementation example 2, if Figure 4 As shown, the liquid heater includes a host 60 that can be detachably matched with the glass body 10, the control device includes a main control board arranged in the host 60, a coupler is arranged between the glass body 10 and the host 60, and the second interface 22 and the main control board are connected to each other through the coupler. Specifically, the host 60 is a base supported under the glass body 10, and a motor 70 connected to the main control board is also arranged in the base, a crushing knife 80 is arranged at the bottom of the glass body 10, and the rotating shaft of the motor 70 is connected to the crushing knife 80 in a transmission manner.

[0082] The host 60 of the liquid heater can be selected as a head or a base. For a head-type liquid heater, such as a traditional soymilk maker, since the temperature sensor 30 is connected to the first interface 21 of the detection board 20, the coupler does not need to transmit the temperature signal separately, but only needs to connect the second interface 22 and the main control board to achieve compatible transmission of temperature signals and liquid level signals, simplify the layout of the wiring harness, and achieve more accurate temperature and liquid level detection.

[0083] The main unit 60 of the liquid heater is a base, such as a wall-breaking machine, a health pot, a water kettle, etc. with a motor 70 placed below. While expanding various models, it also realizes the integration of the detection board 20, simplifies the control device, simplifies the connection harness layout, realizes more accurate temperature and liquid level detection, and has a reliable structure.

[0084] In addition, in the implementation example 1 of the utility model, a heating plate is used to directly heat the glass cup body 10, and the heating efficiency is high. The temperature sensor 30 is installed on the heating plate, and the temperature detection and temperature control are more direct and the detection is accurate. The temperature sensor 30 and the detection board 20 are respectively located at the bottom and side of the glass cup body 10, and the first interface 21 is set below the capacitor electrode 23. Compared with the situation where the first interface 21 is located above the capacitor electrode 23, the first interface 21 is closer to the temperature sensor 30, shortening the connecting harness between the two, improving the accuracy of signal transmission, and the functions of the detection board 20 are integrated and reliable.

[0085] In addition, in implementation example 1, the temperature measuring element may be one or more of a temperature sensor, a thermal protection element (fuse, thermostat).

[0086] Of course, the structure of the heating element 40 of the present invention is not limited to the above one, for example:

[0087] In implementation example 3, the glass cup body 10 is a full glass cup with a bottom wall, and the heating element 40 is a heating tube fixed to the bottom wall of the glass cup body 10 .

[0088] In implementation example 4, the heating element 40 is a heating film arranged on the outer wall of the glass cup body 10, the detection plate 20 is separated from the heating film, the thermal protection element abuts against the outer side of the heating film, the first interface 21 is located at one end of the detection plate 20 close to the thermal protection element, and the thermal protection element is connected to the first interface 21.

[0089] In fact, the temperature measuring element in this implementation example may be one or more of a temperature sensor, a thermal protection element (fuse, thermostat).

[0090] Specifically, a ring-shaped heating film structure is used that only wraps around the lower part of the glass cup body 10, the heating film is attached to the bottom of the glass cup body 10, and the detection plate 20 is arranged above the heating film to achieve separation;

[0091] Alternatively, the heating film covers the outer wall of the glass cup body 10, and a clearance gap for evading the detection plate 20 is provided on the heating film, so that the detection plate 20 and the heating film are separated to avoid signal interference.

[0092] By adopting a heating film to heat the glass cup body 10, three-dimensional circulation heating is realized, the heating efficiency is high, and the boiling effect is good. Since the detection plate 20 and the heating film are both located on the side of the glass cup body 10, the detection plate 20 and the heating film are separated, so as to avoid direct heat transfer from the heating film to the detection plate 20, and reduce the influence of the metal structure in the heating film on the detection accuracy of the detection plate 20. Therefore, the detection is reliable, and the first interface 21 is set at one end of the detection plate 20 close to the temperature sensor 30, so that the connection harness between the first interface 21 and the temperature sensor 30 can be shortened, thereby improving the accuracy of signal transmission and avoiding unnecessary waste of materials. The functions of the detection plate 20 are integrated and reliable.

[0093] No matter the utility model adopts a heating plate or a heating film, the temperature sensor 30 can be indirectly installed on the bottom of the glass cup body 10 through the heating plate or directly fixed on the side of the glass cup body 10. The temperature sensor 30 is installed on the glass cup body 10. The temperature sensor 30 and the glass cup body 10 form an integrated component. For the traditional head-type soymilk machine, the temperature sensor 30 is installed on the head instead of the cup body. There is no need to transmit the temperature signal separately through the coupler, which is conducive to reducing the volume of the coupler and reducing the risk of signal instability and detection failure caused by water entering the coupler.

[0094] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0095] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0096] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A liquid heater with reliable detection, comprising a glass body, a detection plate for detecting the liquid level in the glass body, a temperature measuring element, a heating element and a control device, characterized in that: The detection plate is strip-shaped and vertically fixed to the outer wall of the glass body. The detection plate is provided with a first interface and a second interface. The first interface is connected to the temperature measuring element, and the second interface is connected to the control device.

2. A liquid heater with reliable detection according to claim 1, characterized in that: The front of the detection board faces the glass cup body and is provided with a capacitor electrode. The back of the detection board is provided with a processing chip, the processing chip is connected to the capacitor electrode, the first interface is connected to the processing chip, and the control device includes a main control board connected to the second interface.

3. A liquid heater with reliable detection according to claim 1, characterized in that: The control device comprises a main control board, a processing chip is arranged on the main control board, and a capacitor electrode is arranged on the detection board. The main control board is connected to the second interface so that the capacitor electrode is connected to the processing chip.

4. The liquid heater with reliable detection according to claim 1, characterized in that: The detection board is provided with a first terminal seat and a second terminal seat which are arranged in parallel in a transverse direction, and the first interface and the second interface are respectively arranged at the first terminal seat and the second terminal seat.

5. The liquid heater with reliable detection according to claim 1, characterized in that: The detection board is provided with a third terminal seat, and the first interface and the second interface are both provided at the third terminal seat.

6. The liquid heater with reliable detection according to claim 1, characterized in that: The second interface includes an input terminal and an output terminal arranged on the same terminal seat.

7. The liquid heater with reliable detection according to claim 1, characterized in that: The temperature measuring element is a temperature sensor extending into the glass body; Alternatively, the temperature measuring element is a thermal protection element.

8. The liquid heater with reliable detection according to claim 1, characterized in that: The heating element is a heating plate fixed on the bottom of the glass body or a heating film arranged on the outer wall of the glass body, and the first interface is located at one end of the detection plate close to the temperature measuring element.

9. The liquid heater with reliable detection according to claim 1, characterized in that: The liquid heater also includes a host that is detachably matched with the glass cup body, the control device includes a main control board arranged in the host, a coupler is arranged between the glass cup body and the host, and the second interface and the main control board are communicatively connected via the coupler.

10. The liquid heater with reliable detection according to claim 9, characterized in that: The host is a machine head installed at the mouth of the glass cup body, and a motor connected to the main control board is also arranged in the machine head. The rotating shaft of the motor passes through the machine head and is connected to a crushing knife, and the crushing knife extends into the glass cup body; Alternatively, the main machine is a base supported under the glass cup body, and a motor connected to the main control board is also provided in the base. A crushing knife is provided at the bottom of the glass cup body, and the rotating shaft of the motor is transmission-connected to the crushing knife.

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