WO2022160882A1

WO2022160882A1 - Warm boiled water machine able to perform precise temperature adjustment, and milk brewing machine

Info

Publication number: WO2022160882A1
Application number: PCT/CN2021/131742
Authority: WO
Inventors: 肖益华
Original assignee: 深圳市米惜智能电器科技有限公司; 肖益华
Priority date: 2021-01-26
Filing date: 2021-11-19
Publication date: 2022-08-04
Also published as: CN112690658A

Abstract

A warm boiled water machine (10) able to perform precise temperature adjustment, and a milk brewing machine comprising the warm boiled water machine (10). The warm boiled water machine (10) comprises a segmented control heater (100), a heat exchanger (200), and an electronic control system (300); the segmented control heater (100) comprises a heating base body (110) which has a plurality of heating areas (111) and a water passage member (120) which has a plurality of water passage areas (121), each heating area (111) being provided with a heating body (112) and a temperature sensor (113); pre-heated cold water from a sub-heater is introduced into a cold water channel (220) of the heat exchanger (200), an outlet end of the cold water channel (220) conveys a water source to another sub-heater, and a hot water channel (230) of the heat exchanger (200) accepts boiled water that has undergone heating by a sub-heater and exchanges heat with cold water within the cold water channel (220) so as to output warm water; the electronic control system (300) comprises a switch circuit (320), a power supply circuit (330), and a main control circuit (310) connected to each of the temperature sensors (113), the power supply circuit (330) comprises a voltage input circuit (331), a voltage transforming circuit (332), an optical coupling circuit (333), a voltage processor (334), and a rectifier circuit (335), and a main control chip (311) controls a voltage value that the rectifier circuit (335) outputs to a heating body (112) so as to adjust the heating temperature of the heating body (112).

Description

A warm water machine and a milk frother with precise temperature adjustment

technical field

The invention relates to the technical field of warm water equipment, in particular to a warm water machine and a milk frother that can accurately adjust temperature.

Background technique

Warm water dispenser, also known as warm water dispenser, is a drinking water device that cools the boiled water through a heat energy exchanger to obtain warm water with a suitable temperature, which is convenient for users to drink immediately. The outlet water temperature of the warm water machine mainly depends on the performance of the heat exchanger. The heat energy conversion efficiency of the heat exchanger is mainly determined by the material of the heat conduction mechanism and the design of the water circuit of the heat exchanger. The temperature of the warm water output by the machine mainly depends on the temperature of the cooling water. However, due to the different regions and seasons in which the warm water machine is used, the temperature of the water input to the cold water pipeline of the heat exchanger varies greatly due to the influence of the ambient temperature. The temperature of warm water is also very different. The traditional warm water machine has a single function and cannot adjust the output temperature of warm water. It is difficult to meet the needs of users in different regions or meet the needs of users in different seasons, which is not conducive to improving the market competitiveness of products. .

technical problem

Based on this, it is necessary to provide a warm water machine and a milk frother that can precisely adjust the temperature, aiming at the technical problem that the temperature of the warm water outlet is not easy to control.

technical solutions

A warm water machine with precise temperature adjustment, the warm water machine includes:

The segmented control heater includes a heating base and a water-passing member that cooperates with the heating base and forms a plurality of sub-heaters, and is provided with a plurality of heating zones at intervals on the heating base, each of which is The heating area is respectively provided with a heating body that generates heat when connected to electricity and a temperature sensor for detecting the water temperature; a plurality of water passage areas corresponding to the heating area one-to-one are arranged on the water passage member at intervals, and each The surface of the water passage area is respectively provided with an independent continuous water channel, and the water passage member is respectively provided with a water inlet and a water outlet communicated with the continuous water channel at both ends corresponding to each continuous water channel. The water inlet of the heater is used to receive cold water from the outside, and one side wall of the heating base facing away from the heating body cooperates with the continuous water channel to form a plurality of closed water channels, and there are provided between two adjacent closed water channels. sealing structure;

A heat exchanger, the heat exchanger includes at least one heat exchange unit composed of an isolation plate and a cold water channel and a hot water channel formed on both sides of the isolation plate, and the input end of the cold water channel is the same as the input end of the water to be heated. The water outlet of the sub-heater is connected to connect the preheated cold water, the output end of the cold water channel is connected to the water inlet of another sub-heater to provide a heating water source, and the input end of the hot water channel is connected to the output of the cold water channel The water outlet of the sub-heater at the end is connected to connect to boiling water, the boiling water in the hot water channel exchanges heat with the cold water in the cold water channel through the isolation plate, and the output end of the hot water channel outputs direct drinking warm water;

an electronic control system, the electronic control system includes a main control circuit with a main control chip, a switch circuit and a power supply circuit electrically connected to the main control chip, the main control chip is respectively connected to the temperature sensor of each of the sub-heaters It is electrically connected to receive the temperature signal sent by the temperature sensor, and the power supply circuit includes a voltage input circuit electrically connected with an external power supply, a voltage transformer circuit and an optical coupling circuit connected with the voltage input circuit, and a voltage input circuit and an optical coupling circuit connected with the voltage input circuit. A voltage processor connected to the optical coupling circuit and a rectifier circuit connected to the voltage processor and the transformer circuit, the output ends of the rectifier circuit are respectively connected to the heating bodies of the sub-heaters to provide voltage, the main The control chip is used to control the voltage value output by the rectifier circuit to the heating body, so as to adjust the heating temperature of different heating bodies.

In one embodiment, the electronic control system further includes a zero-crossing detection circuit electrically connected to the main control chip and provided with an optocoupler.

In one embodiment, the electronic control system further includes a communication circuit electrically connected to the main control chip and having a communication serial port, and the main control chip is communicatively connected to an external control terminal through the communication serial port.

In one embodiment, the water warmer further includes a water pump electrically connected to the main control chip, the water pump is used to store normal temperature water input from an external water pipe or a water tank, and is controlled by the main control chip. The cold water is delivered to the sub-heater connected to the input end of the cold water channel at a predetermined flow rate.

In one embodiment, the output end of the water pump and the output end of the hot water channel are respectively provided with an NTC temperature sensing device, and the two NTC temperature sensing devices are respectively electrically connected to the main control chip.

In one embodiment, the electronic control system further includes a control panel electrically connected to the main control chip, for inputting temperature control instructions and displaying the water inlet temperature, warm water outlet temperature and water pump flow rate of the warm water machine information.

In one embodiment, the heating base is made of quartz material, food-grade stainless steel material or ceramic material, and the heating body is a thick film slurry, graphene, or wound disposed on the heating base coated on the heating base. The resistance wire on the heating substrate.

In one embodiment, the heating base and the water passing member are both a plate-like structure or a cylindrical structure, or a cylindrical structure and a cylindrical structure that cooperate with each other. When the heating base is a cylindrical structure, the When the water passing member has a cylindrical structure, the heating base is located on the outer layer of the segmented control heater, and the water passing member is located at the core of the segmented control heater; when the heating base and the water passing member When both are in the form of a circular tube, the heating base is located at the core of the segmented control heater, and the water-passing element is located at the outer layer of the segmented control heater.

In one embodiment, a plurality of heat exchange units are arranged in layers, a heat-conducting metal partition is arranged between two adjacent heat exchange units, and the input ends of the cold water channels of each heat exchange unit are connected and connected by The sub-heater of the water to be heated is fed with preheated cold water, the output end of the cold water channel of each heat exchange unit is connected to the water inlet of another sub-heater, and the input end of the hot water channel of each heat exchange unit is connected to the same The sub-heaters at the output end of the cold water channel are connected to connect to boiling water, and the output ends of the hot water channel of each heat exchange unit are connected to output direct drinking warm water.

The invention also discloses a milk frother comprising the above warm water machine.

beneficial effect

The warm water machine and the milk foaming machine that can accurately adjust the temperature of the present invention are implemented by setting up a segmented control heater to preheat the cold water entering the cold water channel of the heat exchanger, so that the water in the cold water channel is first heated to a predetermined temperature and then mixed with the heat exchanger. The hot water in the hot water channel conducts heat exchange, so that the user can control the voltage of the heating body in the sub-heater used for preheating cold water in the sub-heater of the sub-control heater as required, so that the temperature of the warm water output by the heat exchanger can be adjusted. It can reach any expected value to meet the user's needs for warm water use in different regions, seasons and different usage scenarios. The water temperature control of the warm water machine is relatively simple, and the water temperature can be accurately adjusted, which improves the warm water machine and milk frother. Quality reliability and market competitiveness.

Description of drawings

1 is a schematic structural diagram of a warm water machine that can accurately adjust temperature in an embodiment of the present invention;

2 is a schematic cross-sectional structure diagram of a segmented control heater in an embodiment of the present invention;

3 is a schematic structural diagram of a heating substrate in an embodiment of the present invention;

4 is a schematic structural diagram of a water passage in an embodiment of the present invention;

5 is a schematic structural diagram of a heating substrate in another embodiment of the present invention;

6 is a schematic cross-sectional structure diagram of a water passage in another embodiment of the present invention;

7 is a schematic cross-sectional structure diagram of a heat exchanger in an embodiment of the present invention;

8 is a schematic structural diagram of a cold water plate in an embodiment of the present invention;

9 is a schematic structural diagram of a hot water plate in an embodiment of the present invention;

10 is a schematic structural diagram of an electronic control system in an embodiment of the present invention;

11 is a circuit schematic diagram of a main control circuit in an embodiment of the present invention;

12 is a circuit schematic diagram of a zero-crossing detection circuit in an embodiment of the present invention;

13 is a circuit schematic diagram of a communication circuit in an embodiment of the present invention;

FIG. 14 is a circuit schematic diagram of a water pump circuit in an embodiment of the present invention;

FIG. 15 is a circuit schematic diagram of a water inlet NTC temperature sensing device in an embodiment of the present invention;

16 is a circuit schematic diagram of a water outlet NTC temperature sensing device in an embodiment of the present invention;

17 is a circuit schematic diagram of a switch circuit in an embodiment of the present invention;

FIG. 18 is a circuit schematic diagram of a power supply circuit in an embodiment of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

Referring to FIG. 1 , the present invention discloses a warm water boiler 10 with precise temperature adjustment. The warm water boiler 10 includes a segmented control heater 100 , a heat exchanger 200 and an electric control system 300 , wherein the segmented control heating The heater 100 includes a plurality of sub-heaters, preferably, the segmented control heater 100 includes two sub-heaters, one of which is used to connect the normal temperature water input from an external water pipe or a water tank, etc. Cold water with a predetermined temperature is input into the cold water channel 220 of the exchanger 200, and another sub-heater of the sectional control heater 100 is used to connect the heat-exchanged cold water output from the cold water channel 220 and use the cold water as a heating water source. After heating, the boiled water is passed into the hot water channel 230 of the heat exchanger 200, so that the hot water in the hot water channel 230 and the preheated cold water in the cold water channel 220 conduct heat transfer, so that the heat exchanger 200 outputs a predetermined output. In this way, by controlling the heating temperature of the sub-heater for preheating the water, the heat exchanger 200 can output the warm water of any desired temperature. It should be noted that any temperature in this embodiment refers to a temperature that satisfies the laws of thermodynamics and conforms to the laws of water heating and heat exchange. Generally speaking, the temperature of warm water should be between 30 degrees Celsius and 80 degrees Celsius. The electronic control system 300 is used to control the heating temperature of each sub-heater in the segmented control heater 100, and to control the temperature of the final output warm water by adjusting the temperature of the preheated cold water.

Referring to FIGS. 2 to 4 , the segmented control heater 100 includes a heating base 110 and a water-passing member 120 that cooperates with the heating base 110 and forms a plurality of sub-heaters. The sub-heaters work independently of each other and do not interfere with each other. The heating base 110 is used to generate heat under the condition of electrification, so as to provide heat energy to the water to be heated and realize the heating of the water body. Specifically, the heating base 110 is provided with a plurality of heating zones 111 at intervals, and each heating zone 111 is provided with a heating body 112 that generates heat when power is connected and a temperature sensor 113 for detecting the water temperature, and the water passing member 120 is used for Cooperate with the heating base 110 to form a plurality of sub-heaters, that is, the water passing member 120 is mainly used to pass the water to be heated, and provide space for the heating process of the water body. The water passage member 120 is provided with a plurality of water passage areas 121 corresponding to the heating areas 111 at intervals, that is, each water passage area 121 corresponds to a heating area 111, and the projection of the water passage area 121 in the length direction of the water passage member 120 is greater than The projection of the heating area 111 in the length direction of the heating substrate 110 avoids the problem of local overheating of the heater caused by overheating of the exposed part of the heating area 111 adjacent to the water passage 120, thereby prolonging the service life of the equipment. It should be noted that the side of the heating substrate 110 facing away from the heating zone 111, that is, the side in contact with the water passage zone 121 of the water passage member 120, is in contact with the water introduced into the continuous water channel 122 and heats the water, The heat on the heating substrate 110 is taken away, thereby ensuring that the heating area 111 will not be overheated, and improving the safety of the heater.

The surface of each water passage area 121 is respectively provided with an independent continuous water channel 122, and the water passage member 120 is respectively provided with a water inlet 123 and a water outlet 124 communicating with the continuous water channel 122 at both ends corresponding to each continuous water channel 122. And the water inlet 123 of one of the sub-heaters is used to connect cold water from the outside, and a side wall of the heating base 110 facing away from the heating body 112 cooperates with the continuous water channel 122 on the water passage 120 to form a plurality of closed water channels, adjacent to each other. A sealing structure 125 is provided between the two closed water channels. It should be noted that, in this embodiment, the heating base 110 includes two-stage heating zones 111 and the water-passing element 120 includes two-stage water-passing zones 121 for illustration. In actual production, the heating zones 111 can be correspondingly increased according to the needs of water temperature control. The number of the water passage area 121 will not be repeated here.

In one embodiment, the heating base 110 is made of quartz material, food-grade stainless steel or ceramic material, and the heating body 112 is a thick film slurry, graphene, or wound arrangement coated on the heating base 110 Resistance wire on the heating substrate 110 . Both the thick film paste and the graphene are resistive pastes, both of which generate heat rapidly under the condition of electrification, and generate thermal radiation to the heating substrate 110, so that the heating substrate 110 heats up, thereby generating heat for the water to be heated in contact with the heating substrate 110. Radiation to achieve the purpose of heating water bodies. When the resistance wire is wound on the heating base 110, after the resistance wire is energized, when the current passes through the resistance wire, the current does work and consumes electric energy, thereby generating heat, and generating heat radiation to the heating base 110, and then transferring the heat to the other The water in contact with the substrate 110 is heated to realize the heating of the water body. It should be noted that, in this embodiment, whether the method of coating thick film slurry or graphene, or the method of winding resistance wires, the above-mentioned heating body 112 is not provided in the position between two adjacent sub-heaters. In this way, during the operation of the segmented control heater 100, the parts on the heating substrate 110 that are not coated with slurry or wound with resistance wires do not generate heat, that is, the temperature change of the transition part between two adjacent sub-heaters is small, so that The amount of heat transfer between two adjacent heating zones 111 is reduced, and the reliability of the subsection heating operation of the subsection control heater 100 of this embodiment is improved.

Further, when the heating base 110 is a food-grade stainless steel material, 304 stainless steel or 316 stainless steel or other food-grade stainless steel with better high temperature resistance and corrosion resistance can be used to avoid the precipitation of harmful substances when the heating base 110 is in contact with the water body. The problem is that while improving the mechanical strength of the heating substrate 110, the safety of drinking water is improved. In addition, in this embodiment, the heating base 110 made of food-grade stainless steel is provided with an insulating layer 114 on the side where the heating body 112 is arranged, so as to block the electric charge conduction between the heating body 112 and the heating base 110 , to avoid the occurrence of electric leakage accident of the segmented control heater 100 due to the conduction of the heating substrate 110 to make the water body electrified, so as to improve the safety of the segmented control heater 100 in use.

In one embodiment, the heating base 110 is an integral molding structure or includes a plurality of sub-bases that are detachably connected. When the heating base 110 includes a plurality of sub-bases that are detachably connected, each sub-base is correspondingly provided with a heating zone 111 and a heating body. 112 and temperature sensor 113; the water-passing member 120 is integrally formed or includes a plurality of sub-components that can be detachably connected. When the water-passing member 120 includes a plurality of sub-components that are detachably connected, each sub-component is correspondingly provided with a water-passing area 121 and a The water inlet 123 and the water outlet 124 are communicated with the continuous water channel 122 of the water passage area 121 . Preferably, when the heating base 110 is a detachable structure, the plurality of sub-bases are connected by means of snaps, screws, or concave-convex fitting. Similarly, when the water-passing member 120 is a detachable structure, the plurality of Snap, screw or concave-convex fit and other ways to connect. It can be understood that, the heating base 110 and the water passing member 120 can be an integral structure at the same time, or one of the two can be an integral structure and the other can be a disassembled structure, or both can be disassembled at the same time. Structure. When both the heating base 110 and the water-passing member 120 are detachable structures, a plurality of sub-heaters that are independent of each other and can be detached individually are actually formed. In this way, users or production personnel can select a corresponding number of heating bases according to actual needs 110 is combined with the water-passing member 120 to improve the flexibility of using the segmented control heater 100 of this embodiment.

In one embodiment, the heating base 110 and the water passing member 120 are both a plate-like structure or a cylindrical structure, or a cylindrical structure and a cylindrical structure that cooperate with each other. When the heating base 110 is a cylindrical structure, the water passing member 120 is a cylindrical structure. When the heating base 110 is located in the outer layer of the segmented control heater 100, the water passing element 120 is located at the core of the segmented control heater 100; The base body 110 is located at the core of the section-controlled heater 100 , and the water-passing member 120 is located at the outer layer of the section-controlled heater 100 . Referring to FIGS. 2 to 4 , when the heating base 110 and the water passing member 120 are both plate-like structures, the heating base 110 is covered on the water passing member 120 and is sealedly connected with the water passing member 120 , and the surface of the water passing member 120 is concave A continuous water channel 122 is formed, and the surface of the heating substrate 110 facing away from the heating body 112 is placed against and blocked the continuous water channel 122 to form a closed water channel. The continuous water channel 122 can have the S-shaped structure shown in FIG. The S-shaped structure includes a plurality of S bends, so it can also be understood as a serpentine structure, or a volute-shaped structure or a square helical structure to extend the flow path of the water body to be heated in the continuous water channel 122 and ensure the uniform heating of the water body. , so that the temperature of the water body output from the same closed water channel under the same heating temperature of the heating body 112 is the same, thereby improving the reliability of water temperature control by each sub-heater in the segmented control heater 100 . When the heating base 110 has a circular tubular structure and the water passing member 120 has a cylindrical structure, the heating body 112 and the temperature sensor 113 are arranged on the outer side of the heating base 110, and the outer surface of the water passing member 120 protrudes and forms a spiral continuous water channel 122, the water passage 120 is inserted into the heating base 110, and the continuous water channel 122 of the water passage 120 and the heating zone 111 on the inner side of the heating base 110 are enclosed to form a plurality of closed water passages, and the heating base 110 is provided with the water passage. The water inlet 123 and the water outlet 124 of the 120 are in a one-to-one correspondence with the water inlet pipe and the water outlet pipe, and both ends of the heating base 110 are sealed. The element 120 is located at the core of the segmented control heater 100 , and the structure of the heating substrate 110 can be referred to in FIG. 5 .

In another embodiment, when the heating base 110 and the water-passing member 120 are both tubular structures, the heating body 112 and the temperature sensor 113 are disposed on the inner surface of the heating base 110, and the inner surface of the water-passing member 120 protrudes and surrounds. The continuous water channel 122 extends the flow path of the water to be heated and makes the heating more uniform. The heating base 110 is inserted into the water passing member 120 and the outer surface of the heating base 110 and the continuous water channel 122 on the inner surface of the water passing member 120 are formed. A plurality of closed water channels, both ends of the water passage member 120 are sealed. In this case, the heating base 110 is located at the core of the segmented control heater 100, and the water passage member 120 is located at the outer layer of the segmented control heater 100. The structure of the water element 120 can be seen in FIG. 6 .

It should be noted that when the heating base 110 and the water passing member 120 are both plate-like structures, a straight groove 126 is formed between two adjacent closed water channels and a sealing strip is arranged in the straight groove 126. When the heating base 110 is heated When the water-passing element 120 has the same circular tubular structure or is a cylindrical structure and a circular-pipe-like structure that cooperate with each other, an annular groove 127 is formed on the outer surface or the inner surface of the water-passing element 120 between two adjacent closed water channels. And a sealing ring is arranged in the annular groove 127 to block the gap between two adjacent closed water channels, so as to avoid the problem of water inflow.

The heat exchanger 200 includes at least one heat exchange unit consisting of an isolation plate and a cold water channel 220 and a hot water channel 230 formed on both sides of the isolation plate. The input end of the cold water channel 220 is the same as the water outlet of the sub-heater connected to the water to be heated. 124 is connected to access the preheated cold water, the output end of the cold water channel 220 is communicated with the water inlet 123 of another sub-heater to provide a heating water source, and the input end of the hot water channel 230 is the same as that of the sub-heater connected to the output end of the cold water channel 220. The water outlet 124 is connected to connect to boiling water, the boiling water in the hot water channel 230 exchanges heat with the cold water in the cold water channel 220 through the isolation plate, and the output end of the hot water channel 230 outputs warm water for direct drinking. It should be noted that the heat exchanger 200 in this embodiment can be either a common heat exchange device in which a water cavity is separated by a partition plate to form a cold water channel 220 and a hot water channel 230, or a plurality of heat exchange units that are stacked and arranged in parallel. For the connected parallel heat exchange device, the structure of the parallel heat exchange device will be described below.

Please refer to FIG. 7 to FIG. 9 , in one embodiment, a plurality of heat exchange units are arranged in layers, and a heat-conducting metal partition 210 is arranged between two adjacent heat exchange units. The input of the cold water channel 220 of each heat exchange unit is The preheated cold water is passed through the sub-heater connected to the water to be heated, and the output end of the cold water channel 220 of each heat exchange unit is communicated with the water inlet 123 of the other sub-heater. The input end of the hot water channel 230 is communicated with the sub-heater connected to the output end of the cold water channel 220 to connect to boiling water, and the output end of the hot water channel 230 of each heat exchange unit is communicated to output direct drinking warm water. Further, the heat exchanger 200 further includes a first pressing plate 240 and a second pressing plate 250 which are arranged opposite to each other and are used to co-press each heat exchange unit. The first pressing plate 240 and the second pressing plate 250 are fixedly connected by bolts to press each heat exchange unit. unit, thereby improving the structural stability of the heat exchanger 200 and the sealing performance of each heat exchange unit.

Please refer to FIGS. 8 and 9 , the heat exchanger 200 further includes a cold water plate 260 and a hot water plate 270 . The cold water plate 260 is disposed between two adjacent metal partition plates 210 and has a first hollow portion 280 . 280 and two adjacent metal partitions 210 together form a cold water channel 220. The hot water plate 270 is arranged between the two adjacent metal partitions 210 and has a second hollow portion 290, which is adjacent to the adjacent metal partitions 210. The two metal partitions 210 of the two metal partitions together form a hot water channel 230 . For the cold water plate 260 or the hot water plate 270 located on both sides of the heat exchanger 200, the cold water plate 260 and the metal partition plate 210 and the first pressing plate 240 or the second pressing plate 250 together respectively form a cold water channel 220, and the hot water plate 270 and The metal partition plate 210 and the first pressing plate 240 or the second pressing plate 250 together form a hot water channel 230. The first pressing plate 240, the second pressing plate 250 and the metal partition plate 210 are all made of 304 stainless steel or 316 stainless steel or other food grade stainless steel. The parallel heat exchanger 200 in this embodiment is only composed of two pressing plates and a plurality of heat exchange units arranged between the two pressing plates, and the inlets and outlets of two adjacent water channels for passing the same type of water are communicated respectively, The parallel connection of the water channels is realized, while the cooling of the hot water is realized, the circulation area of the water channel is increased, and the distance between the cold water inlet and the warm water outlet of the heat exchanger 200 is shortened, and the water flow resistance is small, which is beneficial to improve the water outlet of the heat exchanger 200. efficiency and extend the life of the equipment.

Please refer to FIG. 10 , the electronic control system 300 includes a main control circuit 310 having a main control chip 311 , a switch circuit 320 and a power supply circuit 330 electrically connected to the main control chip 311 , and the main control chip 311 is respectively connected to the temperature sensor of each sub-heater 113 is electrically connected to receive the temperature signal sent by the temperature sensor 113, and the power supply circuit 330 includes a voltage input circuit 331 electrically connected to an external power supply, a transformer circuit 332 and an optical coupling circuit 333 connected to the voltage input circuit 331, and a transformer circuit 332 and an optical The voltage processor 334 connected to the coupling circuit 333 and the rectifier circuit 335 connected to the voltage processor 334 and the transformer circuit 332, the transformer circuit 332 is used to convert the external civil voltage into a safe voltage suitable for the circuit of the water heater 10, and the optical coupling The circuit 333 is used to filter the input voltage, the voltage processor 334 is used to perform arithmetic processing on the converted and filtered voltage, and the rectifier circuit 335 is used to convert the alternating current into direct current that can be transmitted to the heating body 112 . The output terminals of the rectifier circuit 335 are respectively connected to the heating body 112 of each sub-heater to provide voltage, and the main control chip 311 is connected to the rectifier circuit 335 for controlling the voltage value output by the rectifier circuit 335 to the heating body 112 to adjust different heating the heating temperature of the body 112 . It should be noted that the main control chip 311 in this embodiment also calculates the preheating temperature of cold water according to the voltage value and the power, and calculates the temperature of the warm water outputted by the calculation of the temperature of the hot water and the temperature of the preheated cold water according to the law of thermodynamics, so as to obtain the voltage value and the temperature of the preheated cold water. In this way, during the control process of the warm water machine 10, the user only needs to input a level signal related to the temperature of the warm water outlet to the main control chip 311, and then the main control chip 311 can be driven to control the heating body 112. The voltage value, so as to achieve the purpose of controlling the water temperature.

11 to 18 together, the electronic control system 300 further includes a zero-crossing detection circuit 340 electrically connected to the main control chip 311 and provided with an optocoupler, and a communication circuit 350 electrically connected to the main control chip 311 and having a communication serial port , the main control chip 311 communicates with the external control terminal through the communication serial port, and the water heater 10 also includes a water pump 400 electrically connected to the main control chip 311. Under the control of the control chip 311, cold water is delivered to the sub-heater connected to the input end of the cold water channel 220 at a predetermined flow rate. The output end of the water pump 400 and the output end of the hot water channel 230 are respectively provided with an NTC temperature sensing device. The main control chip 311 is electrically connected. Specifically, the main control chip 311 adopts an IC chip with a model of SOP28, wherein the No. 7 pin and the No. 10 pin of the main control chip 311 are respectively connected to the water outlet NTC temperature sensing device and the water inlet NTC temperature sensing device. The main control chip 311 The 8th pin and the 9th pin are respectively connected to the input end and the output end of the water pump 400 circuit, and the 16th pin and the 18th pin of the main control chip 311 are respectively connected to the Rxd pin and the Txd pin of the communication circuit 350. In this way, the main control chip 311 can be connected to the external controller through the communication circuit 350 using a communication protocol, such as a serial port based on RS232. Of course, the electronic control system 300 in this embodiment may also include a Bluetooth module or/and a wireless signal receiver electrically connected to the main control chip 311 . In this way, an intelligent mobile device with a Bluetooth transceiver function or a wireless signal transmission function may be used. The remote control or the like sends a signal to the main control chip 311 to realize remote control of the water heater 10 . The No. 28 pin of the main control chip 311 is connected to the zero-crossing detection circuit 340, and the zero-crossing detection circuit 340 is connected to determine the frequency and voltage inversion point of the single-phase AC power supply, that is, the zero-crossing point, so as to realize the voltage zero-point driving or power control. , thereby increasing the adjustment range of the voltage value of the heating body 112 by the main control chip 311 and improving the reliability of the operation of the electronic control system 300 . The switch circuit 320 is provided with an integrated circuit IC whose model is AP2301/SOT23-5 and is connected with the main control chip 311 and a switch connected with the integrated circuit IC, so as to facilitate the manual input of commands so that the main control chip 311 can control the heating element 112. Voltage value.

Further, in one embodiment, the electronic control system 300 further includes a control panel electrically connected to the main control chip 311 for inputting temperature control commands and displaying the water inlet temperature, the warm water outlet temperature and the flow information of the water pump 400 of the warm water heater 10 . . Preferably, the control panel is a touch display screen. In this way, while receiving external control signals through the touch display screen, the current working parameters of the water heater 10 can be read in real time, so as to accurately adjust the temperature of the warm water.

In addition, the present invention also discloses a milk frother including the above-mentioned water warmer 10 . The water outlet 124 of the milk frother is the output end of the hot water channel 230 of the heat exchanger 200 of the water warmer 10 . In this way, the user can By inputting a control command to the main control chip 311 of the milk frother, the temperature of the outlet water of the milk frother can be precisely controlled to a predetermined value, so that the output temperature of the warm water can meet the requirements of the warm water used for milk frother, and avoid the overheating of the milk frother. It can improve the quality and reliability of the milk frother due to the loss of nutrients in milk powder caused by high milk powder.

The warm water machine 10 and the milk frother that implement the precise temperature adjustment of the present invention preheat the cold water entering the cold water channel 220 of the heat exchanger 200 by setting the segmented control heater 100, so that the cold water in the cold water channel 220 is heated. The water is first heated to a predetermined temperature and then exchanges heat with the hot water in the hot water channel 230. In this way, the user can control the voltage of the heating body 112 in the sub-heater used for preheating cold water in the sub-heater 100 according to the needs, that is, The temperature of the warm water output by the heat exchanger 200 can be made to reach any expected value, so as to meet the user's demand for warm water use in different regions, different seasons and different usage scenarios. The water temperature control of the warm water machine 10 is relatively simple and can be precisely adjusted. The outlet water temperature improves the reliability and market competitiveness of the warm water machine 10 and the quality of the milk frother.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

A warm water machine with precise temperature adjustment, characterized in that it includes:

The segmented control heater includes a heating base and a water-passing member that cooperates with the heating base and forms a plurality of sub-heaters, and is provided with a plurality of heating zones at intervals on the heating base, each of which is The heating area is respectively provided with a heating body that generates heat when connected to electricity and a temperature sensor for detecting the water temperature; a plurality of water passage areas corresponding to the heating area one-to-one are arranged on the water passage member at intervals, and each The surface of the water passage area is respectively provided with an independent continuous water channel, and the water passage member is respectively provided with a water inlet and a water outlet communicated with the continuous water channel at both ends corresponding to each continuous water channel. The water inlet of the heater is used to receive cold water from the outside, and one side wall of the heating base facing away from the heating body cooperates with the continuous water channel to form a plurality of closed water channels, and there are provided between two adjacent closed water channels. sealing structure;

A heat exchanger, the heat exchanger includes at least one heat exchange unit composed of an isolation plate and a cold water channel and a hot water channel formed on both sides of the isolation plate, and the input end of the cold water channel is the same as the input end of the water to be heated. The water outlet of the sub-heater is connected to connect the preheated cold water, the output end of the cold water channel is connected to the water inlet of another sub-heater to provide a heating water source, and the input end of the hot water channel is connected to the output of the cold water channel The water outlet of the sub-heater at the end is connected to connect to boiling water, the boiling water in the hot water channel exchanges heat with the cold water in the cold water channel through the isolation plate, and the output end of the hot water channel outputs direct drinking warm water;

an electronic control system, the electronic control system includes a main control circuit with a main control chip, a switch circuit and a power supply circuit electrically connected to the main control chip, the main control chip is respectively connected to the temperature sensor of each of the sub-heaters It is electrically connected to receive the temperature signal sent by the temperature sensor, and the power supply circuit includes a voltage input circuit electrically connected with an external power supply, a voltage transformer circuit and an optical coupling circuit connected with the voltage input circuit, and a voltage input circuit and an optical coupling circuit connected with the voltage input circuit. A voltage processor connected with the optical coupling circuit and a rectifier circuit connected with the voltage processor and the transformer circuit, the output ends of the rectifier circuit are respectively connected with the heating bodies of the sub-heaters to provide voltage, the main The control chip is used to control the voltage value output by the rectifier circuit to the heating body, so as to adjust the heating temperature of different heating bodies.
The water heater according to claim 1, wherein the electronic control system further comprises a zero-crossing detection circuit electrically connected to the main control chip and provided with an optocoupler.
The water heater according to claim 2, wherein the electronic control system further comprises a communication circuit electrically connected to the main control chip and having a communication serial port, and the main control chip communicates with an external control terminal through the communication serial port communication connection.
The warm water machine according to claim 3, characterized in that, the warm water machine further comprises a water pump electrically connected to the main control chip, and the water pump is used to store normal temperature water input from an external water pipe or a water tank, and Under the control of the main control chip, cold water is delivered to the sub-heater connected to the input end of the cold water channel at a predetermined flow rate.
The warm water machine according to claim 4, wherein the output end of the water pump and the output end of the hot water channel are respectively provided with an NTC temperature sensing device, and the two NTC temperature sensing devices are respectively connected with the main control chip. electrical connection.
The warm water machine according to claim 5, wherein the electric control system further comprises a control panel electrically connected with the main control chip for inputting temperature control instructions and displaying the water intake of the warm water machine Temperature, warm water outlet temperature and pump flow information.
The warm water machine according to claim 1, wherein the heating base is made of quartz material, food-grade stainless steel or ceramic material, and the heating body is a thick film paste coated on the heating base material, graphene or a resistance wire wound on the heating substrate.
The warm water machine according to claim 1, wherein the heating substrate and the water passing member are both a plate-like structure or a circular tubular structure, or a cylindrical structure and a circular tubular structure that cooperate with each other. The heating base is in a tubular structure, and when the water passing member is in a cylindrical structure, the heating base is located on the outer layer of the segmented control heater, and the water passing member is located at the core of the segmented control heater; When the heating base and the water-passing member have the same circular tubular structure, the heating base is located at the core of the segment-controlled heater, and the water-passing member is located at the outer layer of the segment-controlled heater.
The warm water machine according to claim 1, wherein a plurality of heat exchange units are arranged in layers, a heat-conducting metal partition is arranged between two adjacent heat exchange units, and a cold water channel of each heat exchange unit is provided. The input end of the heat exchange unit is connected to the preheated cold water through the sub-heater connected to the water to be heated, and the output end of the cold water channel of each heat exchange unit is communicated with the water inlet of another sub-heater. The input end of the hot water channel is communicated with the sub-heater connected to the output end of the cold water channel to connect to boiling water, and the output end of the hot water channel of each heat exchange unit is communicated to output direct drinking warm water.
A milk frother, characterized in that it includes the warm water machine according to any one of claims 1 to 9.