Coffee capsule machine with dry-burn protection

Abstract

The utility model discloses a coffee capsule machine with dry burning prevention structure, including fuselage, water sump part, extraction part and coffee storehouse subassembly. The water pump, heating part and PCB control panel are equipped in the fuselage, and the quantitative cup cylinder of heating part is divided into quantitative cavity and heating cavity, and the disc type pipeline is installed in the heating cavity and communicates with the quantitative cavity, and the heating disc is close to the disc type pipeline, and the temperature sensor senses the quantitative cavity temperature. The power management module of PCB control board is electrically connected with temperature sensor and on-off circuit to control the power supply of heating disc. The temperature sensor is infrared temperature sensor, can convert temperature signal into electric signal and transmit to power management module, and then control on-off circuit. The heating disc and disc type pipeline are all spiral disc body structure, and the heating disc pipe diameter is greater than disc type pipeline pipe diameter, and the fuselage slot mouth is equipped with press switch, and the heating disc is equipped with heat insulation support. The utility model discloses through temperature real -time monitoring prevents dry burning, and heating efficiency is high, has the intelligent control function, and has improved the security.

Description

Technical Field

[0001] This utility model relates to coffee capsule machines, specifically to a coffee capsule machine with an anti-dry-burning structure. Background Technology

[0002] With the wave of consumption upgrading sweeping across the country, coffee capsule machines have quickly become an essential home appliance in modern family kitchens and business office spaces.

[0003] However, hidden safety hazards remain behind the industry's technological advancements: traditional models generally lack intelligent temperature monitoring mechanisms. If the heating element is not powered off in time when the water level in the tank is depleted, it is highly susceptible to dry burning. This hazard not only accelerates the aging of core components such as heating elements and thermostats, significantly reducing the equipment's lifespan, but may also cause short circuits due to sudden increases in localized temperature, potentially leading to serious safety accidents such as fires.

[0004] Therefore, developing a new generation of coffee capsule machines equipped with an intelligent anti-dry-burning system is not only an important direction for technological innovation in the industry, but also an inevitable choice to protect the lives and property of users. Utility Model Content

[0005] The purpose of this invention is to provide a coffee capsule machine with an anti-dry-burning structure. Through optimized design of the heating element and control circuit, the temperature of the heating element is detected in real time to prevent dry burning and improve the safety and reliability of the coffee capsule machine.

[0006] To solve the above-mentioned technical problems, this utility model achieves the following solution: A coffee capsule machine with an anti-dry-burning structure according to this utility model includes a body, a water tank connected to the upper end of the body for water storage, an extraction section connected to the lower end of the body, and a coffee chamber assembly connected to the lower end of the extraction section. The body includes:

[0007] A water pump, the inlet of which is connected to a water storage tank inside the water tank section via a straight pipe;

[0008] The heating section includes a metering cup, a disc-shaped tubing, a heating plate, and a temperature sensor. The metering cup has two compartments arranged vertically, with the upper compartment being the metering compartment and the lower compartment being the heating compartment. The disc-shaped tubing is installed in the heating compartment, with its inlet connected to the metering compartment via a connector, and its outlet connected to the outlet of the metering cup. The heating plate is installed in the heating compartment, closely attached to the tubing. The temperature sensor is installed on the side of the metering cup, near the disc-shaped tubing, with its sensing end extending into the metering compartment and pointing towards the bottom of the compartment.

[0009] The machine body also contains a PCB control board, which has a power management module. The power management module is electrically connected to the temperature sensor and a switching circuit, which is connected to the power supply circuit of the heating plate.

[0010] Furthermore, the temperature sensor is an infrared temperature sensor, which can receive infrared radiation signals representing temperature emitted by the metering cup, and convert the radiation signals into temperature electrical signals and transmit them to the power management module. The power management module performs judgment and processing and generates control electrical signals to control the on / off state of the circuit.

[0011] Furthermore, the power management module includes:

[0012] The MCU has a switch SW1 connected to pin 1, a rechargeable battery BT+ connected to pin 4, and an FB circuit connected to pin 16.

[0013] The indicator light circuit includes LED D1, LED D2, resistor R1, and resistor R2. The first end of resistor R1 is connected to pin 5 of the MCU, and its second end is connected in series with LED D1. The other end of LED D1 is grounded. The first end of resistor R2 is connected to pin 6 of the MCU, and its second end is connected in series with LED D2. The negative terminal of LED D2 is connected to the ground terminal of LED D1.

[0014] Resistor R7, the first end of which is connected to pin 16 of the MCU, and the second end of which is grounded and connected to capacitor C1. The other end of capacitor C1 is connected to BT+ of the rechargeable battery.

[0015] The switching circuit includes resistor R3, resistor R4, transistor Q4, MOS transistor, resistor R5, resistor R6, and resistor R;

[0016] The first end of the resistor R3 is connected to pin 9 of the MCU, and the second end is connected to the base of the transistor Q4;

[0017] A resistor R4 is connected between the base and emitter of the transistor Q4. The emitter of the transistor Q4 is grounded. The collector of the transistor Q4 is connected to the gate G of the MOS transistor and the first terminal of the resistor R5. The source S of the MOS transistor is connected to the second terminal of the resistor R5 and the BT+ of the rechargeable battery. The drain D of the MOS transistor is connected to the first terminal of the resistor R6 and the F+ circuit. The second terminal of the resistor R6 is grounded. The F+ circuit is connected to the resistor R, and the other terminal of the resistor R is grounded.

[0018] The rechargeable battery BT+ is also connected to the first terminal of the photoelectric converter ITS. The second terminal of the photoelectric converter ITS is connected to the first terminal of resistor R8 and the first terminal of capacitor C2. Resistor R8 and capacitor C3 are connected in parallel. The second terminal of resistor R8 is grounded and connected to the third terminal of the photoelectric converter ITS. The second terminal of capacitor C2 is connected to the FB circuit and the first terminal of capacitor C4. The second terminal of capacitor C4 is grounded.

[0019] Furthermore, the body is provided with a slot, and a push-button switch is provided at the slot.

[0020] Furthermore, the heating plate is equipped with a heat-insulating support.

[0021] Furthermore, the heating plate is wound into a spiral disc structure in a plane.

[0022] Furthermore, the disc-shaped pipeline is wound into a spiral disc structure in a plane.

[0023] Furthermore, the diameter of the heating plate is larger than the diameter of the disc-shaped pipeline.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] 1. The coffee capsule machine of this utility model has an anti-dry-burning function: by setting an infrared temperature sensor to detect the temperature in the metering chamber in real time, when the water level in the metering chamber is insufficient and signs of dry burning appear, the temperature sensor transmits a signal to the power management module, and the power management module controls the on / off circuit to cut off the power supply to the heating plate, effectively preventing the occurrence of dry burning and improving the safety of the coffee capsule machine.

[0026] 2. The coffee capsule machine of this utility model has a high-efficiency heating function: the heating plate and the disc-shaped pipeline adopt a spiral disc structure, and the diameter of the heating plate is larger than the diameter of the disc-shaped pipeline, which increases the heating area and heat exchange efficiency, and can quickly heat water, thereby improving the coffee making efficiency.

[0027] 3. The coffee capsule machine of this utility model has a reasonable structure: the design of the press-type delay switch ensures the amount of water in the metering chamber, the heat insulation tray prevents heat loss and protects the machine body parts, and the overall structural design is reasonable, which improves the reliability and service life of the coffee capsule machine.

[0028] 4. The coffee capsule machine of this utility model has intelligent control function: the power management module design realizes intelligent control of the coffee capsule machine, and the indicator light circuit can intuitively display the working status of the equipment, making it convenient for users to operate and use. Attached Figure Description

[0029] Figure 1 This is a perspective view of the coffee capsule machine of this utility model.

[0030] Figure 2 This is a structural diagram of the coffee capsule machine of this utility model after the middle shell has been removed.

[0031] Figure 3 This is an enlarged view of the structure of the coffee capsule machine of this utility model after the middle shell has been removed.

[0032] Figure 4 This is a structural diagram of the heating plate of this utility model.

[0033] Figure 5 This is a structural diagram of the heating part of this utility model.

[0034] Figure 6 This is a circuit diagram of the power management module of this utility model.

[0035] Figure 7 This is the on / off circuit diagram of this utility model.

[0036] Figure 8 This is a circuit diagram showing the connection of the photoelectric converter ITS of this utility model.

[0037] The following components are labeled in the attached diagram: 2. Water tank; 3. Press-button switch; 4. Body; 5. Extraction unit; 6. Coffee chamber assembly; 43. Water pump; 44. Straight pipe; 45. Heating unit; 45. Metering chamber; 451. Coiled tubing; 452. Heating plate; 46. Water outlet; 454. Heat insulation holder; 461. Positive end of heating element; 452. Temperature sensor; 453. Negative end of heating element. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model. Obviously, the embodiments described in this utility model are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0039] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0040] Normally, coffee extraction temperature is between 90-96 degrees Celsius. When the measuring cup is empty and the heating plate at 46 degrees Celsius is continuously heating, the temperature inside the measuring cup will rapidly rise beyond the optimal range for coffee extraction. Therefore, protective measures are necessary.

[0041] Example 1: The specific structure of this utility model is as follows:

[0042] Please refer to the appendix. Figure 1-8 This utility model discloses a coffee capsule machine with an anti-dry-burning structure, comprising a body 4, a water tank 2 connected to the upper end of the body 4 for storing water, an extraction section 5 connected to the lower end of the body 4, and a coffee chamber assembly 6 connected to the lower end of the extraction section 5. The water tank 2 is provided with an openable and closable upper cover 1, which allows water to be injected into the water tank within the water tank 2 when the upper cover 1 is opened.

[0043] The fuselage 4 includes:

[0044] Water pump 43, the water inlet of which is connected to the water storage tank in the water tank section 2 via a straight pipe 44;

[0045] The heating unit 45 includes a metering cup, a disc-shaped tubing 452, a heating plate 46, and a temperature sensor 453. The metering cup has two compartments arranged vertically, with the upper compartment being the metering chamber 451 and the lower compartment being the heating chamber. The disc-shaped tubing 452 is installed in the heating chamber, with its inlet connected to the metering chamber via a connector, and its outlet connected to the outlet 454 of the metering cup. The heating plate 46 is installed in the heating chamber, closely attached to the tubing of the disc-shaped tubing 452. The temperature sensor 453 is installed on the side of the metering cup, near the disc-shaped tubing 452, with its sensing end extending into the metering chamber 451 and pointing towards the bottom of the chamber. The heating plate 46 is wound into a spiral disc structure in a plane. The disc-shaped tubing 452 is wound into a spiral disc structure in a plane. The diameter of the heating plate 46 is larger than the diameter of the disc-shaped pipe 452.

[0046] Example 2:

[0047] The body 4 also contains a PCB control board 47, which has a power management module. The power management module is electrically connected to the temperature sensor 453 and a switching circuit, which is connected to the power supply circuit of the heating plate 46.

[0048] The temperature sensor 453 is an infrared temperature sensor. This infrared temperature sensor can receive infrared radiation signals representing temperature emitted by the metering cup, and convert the radiation signals into temperature electrical signals and transmit them to the power management module. After judgment and processing, the power management module generates control electrical signals to control the on / off state of the circuit.

[0049] The power management module includes:

[0050] The MCU has a switch SW1 connected to pin 1, a rechargeable battery BT+ connected to pin 4, and an FB circuit connected to pin 16. The MCU receives and processes signals and outputs control commands. Pin 1 receives the KEY1 input signal, and pin 4 is connected to the positive terminal of the power supply. By analyzing the input signal, control signals are output from other pins (such as pin 9 HOT).

[0051] The indicator light circuit includes LED D1, LED D2, resistor R1, and resistor R2. The first end of resistor R1 is connected to pin 5 of the MCU, and its second end is connected in series with LED D1. The other end of LED D1 is grounded. The first end of resistor R2 is connected to pin 6 of the MCU, and its second end is connected in series with LED D2. The negative terminal of LED D2 is connected to the ground terminal of LED D1.

[0052] Resistor R7 has its first end connected to pin 16 of the MCU, and its second end grounded and connected to capacitor C1. The other end of capacitor C1 is connected to the BT+ of the rechargeable battery. Capacitor C1 acts as a filter to make the power supply to the MCU more stable. Resistor R7 and the FB circuit are used to detect parameters such as voltage and current, enabling the MCU to achieve closed-loop control and accurately adjust the output.

[0053] The switching circuit includes resistor R3, resistor R4, transistor Q4, MOS transistor, resistor R5, resistor R6, and resistor R;

[0054] The first end of the resistor R3 is connected to pin 9 of the MCU, and the second end is connected to the base of the transistor Q4;

[0055] A resistor R4 is connected between the base and emitter of transistor Q4. The emitter of transistor Q4 is grounded. The collector of transistor Q4 is connected to the gate G of the MOS transistor and the first terminal of resistor R5. The source S of the MOS transistor is connected to the second terminal of resistor R5 and the BT+ of the rechargeable battery. The drain D of the MOS transistor is connected to the first terminal of resistor R6 and the F+ circuit. The second terminal of resistor R6 is grounded. The F+ circuit is connected to resistor R, and the other terminal of resistor R is grounded. The MOS transistor is a high-current power switch. When transistor Q4 is turned on, a suitable voltage is provided to the gate G of the MOS transistor to turn it on.

[0056] The BT+ power supply forms a loop through the drain (D) and source (S) of the MOS transistor, and then through resistor R6 to ground, which can drive the subsequent load heating plate 46 to work or disconnect the circuit; resistor R5 is the gate resistor of the MOS transistor, which plays the role of current limiting and stabilizing the gate voltage.

[0057] The rechargeable battery BT+ is also connected to the first terminal of the photoelectric converter ITS. The second terminal of the photoelectric converter ITS is connected to the first terminal of resistor R8 and the first terminal of capacitor C2. Resistor R8 and capacitor C3 are connected in parallel. The second terminal of resistor R8 is grounded and connected to the third terminal of the photoelectric converter ITS. The second terminal of capacitor C2 is connected to the FB circuit and the first terminal of capacitor C4. The second terminal of capacitor C4 is grounded.

[0058] When temperature sensor 453 detects a normal temperature signal from the dispensing cup, pin 5 of the MCU is energized, causing LED D1 to illuminate and indicate that the coffee capsule machine is in normal operation. When temperature sensor 453 detects that the temperature of the dispensing cup exceeds the coffee extraction temperature range, it converts the temperature signal into a temperature electrical signal and transmits it to the MCU of the power management module. The MCU of the power management module judges and processes the signal and generates a control electrical signal to control the on / off state of the circuit. Energizing pin 6 of the MCU causes LED D2 to illuminate and indicate that the heating element is in a dry-burning fault state.

[0059] Specifically, when HOT is low, after current limiting by resistor R3, the base of transistor Q4 is not sufficiently forward biased, so transistor Q4 is in the cutoff state (transistor cutoff condition: no conduction voltage between base and emitter; NPN transistors require the base voltage to be about 0.7V higher than the emitter voltage to conduct).

[0060] When transistor Q4 is turned off, its collector is essentially "disconnected". The gate G of the MOS transistor is connected to BT+ through resistor R5. However, since there is no current path when transistor Q4 is turned off, the actual gate G level cannot be effectively driven. In the end, the gate G potential is approximately equal to the source S potential (there is no sufficient voltage difference).

[0061] The MOS transistor is set as an N-channel transistor. Due to insufficient gate-source voltage difference, the MOS transistor is in the cutoff state. There is no conductive channel between the drain (D) and source (S). BT+ cannot supply power to the subsequent heating plate 46 through the MOS transistor. The entire power path is disconnected, which ultimately achieves the purpose of preventing dry burning.

[0062] Example 3:

[0063] The body 4 is provided with a slot, and a push-button switch 3 is provided at the slot. The push-button switch 3 connects the power supply after being pressed. The push-button switch 3 is a time delay switch. Through system settings, the power-on time of the time delay switch is sufficient to ensure that the water pump 43 can inject water into the metering chamber 451 in a metering manner after being powered on, thus ensuring the water volume in the metering chamber 451.

[0064] The heating plate 46 is provided with a heat insulation support 461. The heat insulation support 461 prevents heat from diffusing to the outside. It effectively prevents heat loss from the heating plate 453 and protects other components of the body 4.

[0065] In summary, the coffee capsule machine of this invention has an anti-dry-burning function: by setting an infrared temperature sensor to detect the temperature in the metering chamber in real time, when the water level in the metering chamber is insufficient and signs of dry burning appear, the temperature sensor transmits a signal to the power management module, and the power management module controls the on / off circuit to cut off the power supply to the heating plate, effectively preventing the occurrence of dry burning and improving the safety of the coffee capsule machine.

[0066] The coffee capsule machine of this invention has a high-efficiency heating function: the heating plate and the disc-shaped pipeline adopt a spiral disc structure, and the diameter of the heating plate is larger than that of the disc-shaped pipeline, which increases the heating area and heat exchange efficiency, and can quickly heat water, thereby improving the efficiency of coffee making.

[0067] The coffee capsule machine of this invention has a reasonable structure: the design of the press-type delay switch ensures the amount of water in the metering chamber, the heat insulation tray prevents heat loss and protects the machine body components, and the overall structural design is reasonable, which improves the reliability and service life of the coffee capsule machine.

[0068] The coffee capsule machine of this invention has intelligent control function: the power management module design realizes intelligent control of the coffee capsule machine, and the indicator light circuit can intuitively display the working status of the equipment, making it convenient for users to operate and use.

[0069] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A coffee capsule machine with an anti-dry-burning structure, comprising a body (4), a water tank (2) connected to the upper end of the body (4) for storing water, an extraction unit (5) connected to the lower end of the body (4), and a coffee container assembly (6) connected to the lower end of the extraction unit (5), characterized in that, The fuselage (4) includes: A water pump (43) has its inlet end connected to a water storage tank inside the water tank section (2) via a straight pipe (44); The heating part (45) has a metering cup, a disc-shaped pipeline (452), a heating plate (46), and a temperature sensor (453). The metering cup has two compartments arranged vertically, the upper compartment being the metering compartment (451) and the lower compartment being the heating compartment. The disc-shaped pipeline (452) is installed in the heating compartment, and the inlet end of the disc-shaped pipeline (452) is connected to the metering compartment via a connecting pipe. Its outlet end is connected to the outlet (454) of the metering cup. The heating plate (46) is installed in the heating compartment and is closely attached to the pipeline of the disc-shaped pipeline (452). The temperature sensor (453) is installed on the side of the metering cup and close to the disc-shaped pipeline (452). Its sensing end extends into the metering compartment (451) and points to the bottom of the metering compartment (451). The body (4) is also equipped with a PCB control board (47), which is equipped with a power management module. The power management module is electrically connected to the temperature sensor (453) and a switching circuit, which is connected to the power supply circuit of the heating plate (46).

2. A coffee capsule machine with an anti-dry-burning structure according to claim 1, characterized in that, The temperature sensor (453) is an infrared temperature sensor. The infrared temperature sensor can receive the infrared radiation signal representing the temperature emitted by the metering cup, and convert the radiation signal into a temperature electrical signal and transmit it to the power management module. After judgment and processing, the power management module generates a control electrical signal to control the on / off circuit.

3. A coffee capsule machine with an anti-dry-burning structure according to claim 1, characterized in that, The power management module includes: The MCU has a switch SW1 connected to pin 1, a rechargeable battery BT+ connected to pin 4, and an FB circuit connected to pin 16. The indicator light circuit includes LED D1, LED D2, resistor R1, and resistor R2. The first end of resistor R1 is connected to pin 5 of the MCU, and its second end is connected in series with LED D1. The other end of LED D1 is grounded. The first end of resistor R2 is connected to pin 6 of the MCU, and its second end is connected in series with LED D2. The negative terminal of LED D2 is connected to the ground terminal of LED D1. Resistor R7, the first end of which is connected to pin 16 of the MCU, and the second end of which is grounded and connected to capacitor C1. The other end of capacitor C1 is connected to BT+ of the rechargeable battery. The switching circuit includes resistor R3, resistor R4, transistor Q4, MOS transistor, resistor R5, resistor R6, and resistor R; The first end of the resistor R3 is connected to pin 9 of the MCU, and the second end is connected to the base of the transistor Q4; A resistor R4 is connected between the base and emitter of the transistor Q4. The emitter of the transistor Q4 is grounded. The collector of the transistor Q4 is connected to the gate G of the MOS transistor and the first terminal of the resistor R5. The source S of the MOS transistor is connected to the second terminal of the resistor R5 and the BT+ of the rechargeable battery. The drain D of the MOS transistor is connected to the first terminal of the resistor R6 and the F+ circuit. The second terminal of the resistor R6 is grounded. The F+ circuit is connected to the resistor R, and the other terminal of the resistor R is grounded. The rechargeable battery BT+ is also connected to the first terminal of the photoelectric converter ITS. The second terminal of the photoelectric converter ITS is connected to the first terminal of resistor R8 and the first terminal of capacitor C2. Resistor R8 and capacitor C3 are connected in parallel. The second terminal of resistor R8 is grounded and connected to the third terminal of the photoelectric converter ITS. The second terminal of capacitor C2 is connected to the FB circuit and the first terminal of capacitor C4. The second terminal of capacitor C4 is grounded.

4. A coffee capsule machine with an anti-dry-burning structure according to claim 1, characterized in that, The body (4) is provided with a slot, and a push-button switch (3) is provided at the slot.

5. A coffee capsule machine with an anti-dry-burning structure according to claim 1, characterized in that, The heating plate (46) is provided with a heat insulation support (461).

6. A coffee capsule machine with an anti-dry-burning structure according to claim 1, characterized in that, The heating plate (46) is wound into a spiral disc structure in a plane.

7. A coffee capsule machine with an anti-dry-burning structure according to claim 1, characterized in that, The disc-shaped pipe (452) is wound into a spiral disc structure in a plane.

8. A coffee capsule machine with an anti-dry-burning structure according to claim 1, characterized in that, The diameter of the heating plate (46) is larger than the diameter of the disc-shaped pipe (452).

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