Portable coffee capsule machine with intelligent temperature control plate structure

Abstract

The utility model discloses a portable coffee capsule machine with intelligent temperature control plate structure, which comprises, from top to bottom, a water tank part, a body control part, a capsule piercing and extraction part and a coffee tank connected in sequence. The bottom of the water tank part is provided with a heater and a temperature sensor. The body control part is provided with a pump pressure water pump and a PCB control board. The temperature control circuit on the PCB control board comprises a polarity protection circuit, a power drive unit, a core control unit and the like. Through the cooperative work of the components, the problems of inaccurate temperature control, poor portability and inconvenient operation and cleaning of the prior art are solved. The portable coffee capsule machine realizes accurate temperature control to improve the quality of coffee. Through the design of a portable pull belt, a detachable cover and a detachable coffee tank, the user can conveniently carry, operate and clean the portable coffee capsule machine, which has the advantages of safety protection and stable reliability.

Description

Technical Field

[0001] This utility model relates to the field of capsule machine technology, specifically to a portable coffee capsule machine with an intelligent temperature control plate structure. Background Technology

[0002] Existing portable coffee capsule machine technology has some significant shortcomings. On the one hand, the temperature control system lacks precision, making it difficult to accurately control the water temperature within the optimal range for coffee extraction. This results in inconsistent coffee extraction quality, failing to fully showcase the flavor and taste of the coffee.

[0003] On the other hand, the device's portability design is not perfect, making it inconvenient to carry and affecting the user experience when using it outdoors.

[0004] In addition, the structural design of some equipment is not conducive to user operation and cleaning, increasing the difficulty of use and maintenance costs. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the technical problem to be solved by this utility model is to provide a portable coffee capsule machine with an intelligent temperature control plate structure, so as to solve the above-mentioned technical problems.

[0006] To solve the above technical problems, the present invention is achieved through the following solution: The present invention provides a portable coffee capsule machine with an intelligent temperature control plate structure, which, from top to bottom, includes a water tank, a machine body control unit, a capsule puncture extraction unit and a coffee tank connected in sequence. The bottom of the water tank is provided with a heater and a temperature sensor for sensing water temperature.

[0007] The machine body control unit is equipped with a pump-type water pump, which connects the water tank and the inner cavity of the capsule puncture extraction unit through pipelines to form a water supply system for the capsule puncture extraction unit.

[0008] The fuselage control unit also includes a PCB control board, which has a temperature control circuit, the temperature control circuit comprising:

[0009] Polarity protection circuit connected to the positive and negative terminals of the battery;

[0010] A power drive unit connected to the positive terminal of the battery;

[0011] A core control unit connected to the power drive unit, the core control unit also being electrically connected to the polarity protection circuit;

[0012] A temperature sensor connected to the output terminal of the power drive unit;

[0013] Both the voltage detection unit and the current detection unit have their output terminals connected to the temperature sensor, and their controlled terminals are connected to the core control unit.

[0014] The heating element is part of the heater and is located inside the heater housing. The electrical input terminal of the heating element is connected to the output terminal of the power drive unit, and the other end of the heating element is grounded.

[0015] Furthermore, the polarity protection circuit includes:

[0016] MCU;

[0017] Power drive unit connected to the MCU via PWM signal;

[0018] A first MOSFET Q1 and a second MOSFET Q2 are respectively connected to the power drive unit. The source S of the first MOSFET Q1 and the drain D of the second MOSFET Q2 are connected together, and the drain D of the first MOSFET Q1 is grounded.

[0019] An inductor is connected at one end to the source of the first MOSFET Q1 and at the other end to the VOUT circuit and the first capacitor. The other end of the first capacitor is grounded.

[0020] The second capacitor has one end grounded and the other end connected to the source of the second MOSFET Q2, the source of which is connected to the positive terminal of the battery.

[0021] Furthermore, an amplifier is connected between the electrical input terminal of the heating element and the core control unit.

[0022] Furthermore, the heater is also provided with a guide hole leading to the capsule puncture extraction section.

[0023] Furthermore, a portable pull strap is embedded between the water tank section and the fuselage control section.

[0024] Furthermore, the end of the water tank section is a removable cover.

[0025] Furthermore, the coffee chamber is a detachable chamber that is rotatably fastened to the capsule puncture extraction section.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] 1. The portable coffee capsule machine of this utility model can accurately control the temperature and improve the quality of coffee: through the coordinated work of components such as temperature sensor, core control unit, power drive unit and heating tube in temperature control circuit, the water temperature in water tank can be accurately controlled to keep the water temperature within the most suitable range for coffee extraction, thereby ensuring the extraction quality of coffee and making the coffee have a richer flavor and a more mellow taste.

[0028] 2. The portable coffee capsule machine of this utility model is easy to carry: the portable pull strap between the water tank and the control unit allows users to easily carry the coffee capsule machine, meeting the user's needs in scenarios such as going out and traveling, and greatly improving the portability of the device.

[0029] 3. The portable coffee capsule machine of this utility model has a reasonable structure and is easy to operate and clean: the detachable cover of the water tank and the detachable design of the coffee tank, as well as the rotating buckle method, make it more convenient and faster for users to add water, take out coffee capsules and clean the equipment, reducing the user's operating difficulty and the equipment maintenance cost.

[0030] 4. This portable coffee capsule machine features robust safety protection and reliable operation: the polarity protection circuit effectively prevents damage to the circuit and equipment caused by reversed battery polarity, improving the device's safety and stability. Simultaneously, the voltage and current detection units monitor the voltage and current in the circuit in real time. In case of abnormalities, the core control unit can react promptly to ensure the normal operation of the device. Attached Figure Description

[0031] Figure 1 This is a side view of the coffee capsule machine of this utility model.

[0032] Figure 2 This is a three-dimensional structural diagram of the present invention after the middle shell has been disassembled.

[0033] Figure 3 This is a structural diagram of the heating element of this utility model.

[0034] Figure 4 This is a schematic diagram of the temperature control circuit connection structure of this utility model.

[0035] Figure 5 This is a schematic diagram of the connection structure of the polarity protection circuit of this utility model.

[0036] Figure 6 This is an amplifier circuit diagram showing the connection between the heating element and the core control unit of this utility model.

[0037] The following components are labeled in the attached diagram: 1. Water tank; 2. Portable pull strap; 3. Body control unit; 4. Capsule puncture extraction unit; 5. Coffee chamber; 11. Temperature sensor; 12. Heater; 13. Flow guide hole; 31. PCB control board; 311. Temperature control circuit; 312. Heating tube. 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] Example 1: The specific structure of this utility model is as follows:

[0041] Please refer to the appendix. Figure 1-6 The present invention provides a portable coffee capsule machine with an intelligent temperature control plate structure, which includes, from top to bottom, a water tank 1, a machine body control unit 3, a capsule puncture extraction unit 4 and a coffee tank 5 connected in sequence. The bottom of the water tank 1 is provided with a heater 12 and a temperature sensor 11 for sensing water temperature.

[0042] The body control unit 3 is equipped with a pump-type water pump, which connects the inner cavity of the water tank 1 and the capsule puncture extraction unit 4 through a pipeline to form a water supply system for the capsule puncture extraction unit.

[0043] The fuselage control unit 3 is also provided with a PCB control board 31, which is provided with a temperature control circuit 311, the temperature control circuit 311 including:

[0044] Polarity protection circuit connected to the positive and negative terminals of the battery;

[0045] A power drive unit connected to the positive terminal of the battery;

[0046] The core control unit is connected to the power drive unit, and the core control unit is also electrically connected to the polarity protection circuit; the core control unit uses an MCX N947 chip.

[0047] A temperature sensor connected to the output terminal of the power drive unit;

[0048] Both the voltage detection unit and the current detection unit have their output terminals connected to the temperature sensor, and their controlled terminals are connected to the core control unit.

[0049] Heating element 312 is part of heater 12 and is located inside the housing of heater 12. The electrical input terminal of heating element is connected to the output terminal of power drive unit, and the other end of heating element is grounded.

[0050] The resistance value of the heating element 312 is detected by the voltage detection unit and the current detection unit. The core control unit is set with a target resistance value. As the temperature rises, the resistance of the heating element 312 will continuously increase and approach the target resistance value. After working for a period of time, when the resistance of the heating element 312 reaches the target resistance value, the core control unit controls the voltage output to reduce the power of the heating element 312 or to stop the heating element 312 from working. When the external environment takes away the heat from the heating element 312 and lowers the temperature of the heating wire, the core control unit controls the voltage output to increase the power of the heating element 312. By increasing and decreasing the power of the heating element 312, the temperature of the heating element 312 is stabilized.

[0051] In temperature control mode, to achieve precise temperature control, the power needs to be dynamically adjusted to maintain a constant temperature. Since the temperature coefficient of the heating element 312 remains essentially unchanged with temperature, meaning there is a linear correlation between resistance and temperature, this characteristic is used to calculate the required resistance value. When the heating element 312 reaches a certain temperature, the required resistance value at that temperature can be derived. Therefore, by continuously increasing the temperature and checking the resistance, it can be determined whether the corresponding temperature has been reached. As the temperature rises, the resistance value of the heating element 312 will continuously increase, approaching the target resistance value. After working for a period of time and the resistance reaches the target value, the power output needs to be reduced or even turned off to prevent overheating at the output terminal. When external factors remove heat from the heating element 312 in an attempt to lower its temperature, the power must be appropriately increased. This adjustment of power output stabilizes the temperature of the heating element 312, thus achieving the required temperature control.

[0052] During temperature control operation, several operating modes are available: automatic mode and adjustable Joule mode. In automatic mode, the maximum power changes with the temperature setting. Higher temperatures result in a higher maximum power, faster heating, and more heat generation. Lower temperatures result in lower maximum power and a slower heating rate, leading to a lower temperature setting. In adjustable Joule mode, multiple Joule values ​​are available for the same temperature. A higher Joule value results in a faster temperature reach and a noticeable combustion effect. Conversely, a lower Joule value results in a gentler heating process.

[0053] The polarity protection circuit includes:

[0054] The MCU used is the TPS2421.

[0055] The power drive unit is connected to the MCU via a PWM signal. Figure 5 The driver module in the middle;

[0056] A first MOSFET Q1 and a second MOSFET Q2 are respectively connected to the power drive unit. The source S of the first MOSFET Q1 and the drain D of the second MOSFET Q2 are connected together, and the drain D of the first MOSFET Q1 is grounded.

[0057] An inductor is connected at one end to the source of the first MOSFET Q1 and at the other end to the VOUT circuit and the first capacitor. The other end of the first capacitor is grounded.

[0058] The second capacitor has one end grounded and the other end connected to the source of the second MOSFET Q2, the source of which is connected to the positive terminal of the battery.

[0059] An amplifier is also connected between the electrical input terminal of the heating element 312 and the core control unit.

[0060] The first MOSFET Q1 is an N-channel junction field-effect transistor (JFET), and the second MOSFET Q2 is also an N-channel JFET. The NFETs Q1 and Q2 are connected in series and are connected to the PWM (Pulse Width Modulation) terminal of the core control unit via a power drive unit. To prevent circuit conduction even when the battery is inserted incorrectly, the circuit actively disconnects the negative terminal of the battery from the negative terminal of the circuit board. This effectively protects the circuit's safety during use. Specifically, the voltage difference between the positive and negative terminals of the battery under normal conditions is used to activate the reverse connection protection MOSFET's drive switch. When the battery is inserted incorrectly, the MOSFET's drive switch remains closed, actively isolating the battery's negative terminal from the circuit's negative terminal. When power adjustment is needed, the PWM (Pulse Width Modulation) terminal of the core control unit activates its PWM mode. Power is adjusted by changing the duty cycle. The battery voltage is intermittently supplied to the inductor via the continuous switching of the N-channel junction field-effect transistor Q2. The stable freewheeling current from the inductor regulates the output voltage. This method achieves an efficiency of over 95%, is easy to control, and has high reliability.

[0061] The output voltage monitoring circuit uses a voltage divider resistor to convert a high voltage to a low voltage. The core control unit acquires the voltage and calculates the output voltage value using a multiplier. To output a specified power value, an accurate resistance value needs to be measured first, and then calculated using the power formula P=U. 2Given P and R, the required voltage value can be calculated. Therefore, resistance measurement is very important. The output voltage is measured using a voltage divider resistor, and the output current is measured using a milliohm resistor. With the voltage and current, the resistance value can be calculated using the formula R=U / I.

[0062] The voltage of the system's boost converter is V, the operational amplifier has a gain of N, and the voltage sent to the core control unit is V1. Therefore,

[0063] The current flowing through the temperature sensor is I = (V1 / N) / r, and the resistance of the heating element 312 is R = V / I.

[0064] For example: V=4.5V, V1=3V, N=10, r=100Ω;

[0065] I = (V1 / N) / r = (3 / 10) / 0.1 = 3A;

[0066] R = V / I = 4.5 / 3 = 1.5KΩ.

[0067] Assuming the maximum current limit in the current limit control is 17A, if the current exceeds the limit during operation, the system will automatically cut off the output or reduce the power to prevent excessive output current from damaging electronic materials. The value calculated here is only the result of one measurement and one action. In actual engineering applications, due to the inherent errors of electronic components, multiple sampling is required to remove glitches and sampling errors in the waveform. In the entire measurement system, due to the precision limitations of the operational amplifier, the voltage supplied to the operational amplifier will be larger when the current is large, and the amplifier's output error relative to its own system error will be smaller. If it is less than 0.5V, the entire system will decide to perform another voltage boosting action within a very short time. Through this multiple trial method, the value is read only when the voltage value of the operational amplifier output is not too small. This allows the entire measuring device to operate within a more reasonable operating range to the greatest extent, thereby improving the measurement accuracy.

[0068] The core control unit controls the voltage detection unit and current detection unit to detect the resistance value of the heating element 312's resistance wire. The detection time is set to 5ms. That is, the voltage detection unit and current detection unit measure the resistance of the heating element 312's resistance wire every 5ms to compare it with the target resistance value. When the measured resistance value is far from the target resistance value, a higher power is used to heat up the device. As the temperature rises, the measured resistance gradually approaches the target resistance. At this point, the power is reduced. Dynamically adjusting the power when the temperature approaches the target can control the temperature of the heating element 312's resistance wire.

[0069] Example 2:

[0070] The heater 12 is also provided with a guide hole 13 leading to the capsule puncture extraction section 4. The guide hole 13 is provided with a solenoid valve, and the opening and closing of the solenoid valve is controlled by a PCB circuit board.

[0071] A portable strap 2 is embedded between the water tank section 1 and the body control section 3. The portable strap 2 makes the coffee capsule machine of this invention easier to carry.

[0072] The end of the water tank section 1 is a detachable cover, which is connected to the main body of the water tank section 1 by a rotating buckle.

[0073] The coffee compartment 5 is a detachable compartment, which is rotatably fastened to the capsule puncture extraction part 4. Specifically, L-shaped fastening grooves are arranged in a ring array in the capsule puncture extraction part 4, and L-shaped fastening strips are arranged in a ring array inside the detachable compartment. The L-shaped fastening strips are fastened into the L-shaped fastening grooves to achieve fastening.

[0074] In summary, the portable coffee capsule machine of this invention can precisely control the temperature and improve the quality of coffee: through the coordinated work of components such as the temperature sensor, core control unit, power drive unit and heating element in the temperature control circuit, the water temperature in the water tank can be precisely controlled to keep the water temperature within the range most suitable for coffee extraction, thereby ensuring the extraction quality of coffee and giving it a richer flavor and a more mellow taste.

[0075] This utility model of a portable coffee capsule machine is easy to carry: the portable strap between the water tank and the control unit allows users to easily carry the coffee capsule machine, meeting their needs in scenarios such as going out and traveling, and greatly improving the portability of the device.

[0076] The portable coffee capsule machine of this utility model has a reasonable structure and is easy to operate and clean: the detachable cover of the water tank and the detachable design of the coffee tank, as well as the rotating buckle method, make it more convenient and faster for users to add water, remove coffee capsules and clean the equipment, reducing the difficulty of operation for users and the maintenance cost of the equipment.

[0077] This utility model provides safe and reliable protection for a portable coffee capsule machine: the polarity protection circuit effectively prevents damage to the circuit and equipment caused by reversed battery polarity, improving the safety and stability of the device. Simultaneously, the voltage and current detection units monitor the voltage and current in the circuit in real time. When abnormalities occur, the core control unit can react promptly to ensure the normal operation of the device.

[0078] 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 portable coffee capsule machine with an intelligent temperature control plate structure, comprising, from top to bottom, a water tank (1), a machine control unit (3), a capsule puncture extraction unit (4), and a coffee chamber (5) connected in sequence, characterized in that, The bottom of the water tank (1) is provided with a heater (12) and a temperature sensor (11) for sensing water temperature. The body control unit (3) is equipped with a pump-type water pump, which connects the water tank (1) and the inner cavity of the capsule puncture extraction unit (4) through a pipeline to form a water supply system for the capsule puncture extraction unit; The fuselage control unit (3) is also provided with a PCB control board (31), which is provided with a temperature control circuit (311), the temperature control circuit (311) including: Polarity protection circuit connected to the positive and negative terminals of the battery; A power drive unit connected to the positive terminal of the battery; A core control unit connected to the power drive unit, the core control unit also being electrically connected to the polarity protection circuit; A temperature sensor connected to the output terminal of the power drive unit; Both the voltage detection unit and the current detection unit have their output terminals connected to the temperature sensor, and their controlled terminals are connected to the core control unit. Heating element (312), which is part of the heater (12) and is located inside the housing of the heater (12), has its electrical input terminal connected to the output terminal of the power drive unit and its other end grounded.

2. A portable coffee capsule machine with an intelligent temperature control plate structure according to claim 1, characterized in that, The polarity protection circuit includes: MCU; Power drive unit connected to the MCU via PWM signal; A first MOSFET Q1 and a second MOSFET Q2 are respectively connected to the power drive unit. The source S of the first MOSFET Q1 and the drain D of the second MOSFET Q2 are connected together, and the drain D of the first MOSFET Q1 is grounded. An inductor is connected at one end to the source of the first MOSFET Q1 and at the other end to the VOUT circuit and the first capacitor. The other end of the first capacitor is grounded. The second capacitor has one end grounded and the other end connected to the source of the second MOSFET Q2, the source of which is connected to the positive terminal of the battery.

3. A portable coffee capsule machine with an intelligent temperature control plate structure according to claim 2, characterized in that, An amplifier is also connected between the electrical input terminal of the heating element (312) and the core control unit.

4. A portable coffee capsule machine with an intelligent temperature control plate structure according to claim 1, characterized in that, The heater (12) is also provided with a guide hole (13) leading to the capsule puncture extraction section (4).

5. A portable coffee capsule machine with an intelligent temperature control plate structure according to claim 1, characterized in that, A portable pull strap (2) is embedded between the water tank section (1) and the fuselage control section (3).

6. A portable coffee capsule machine with an intelligent temperature control plate structure according to claim 1, characterized in that, The end of the water tank section (1) is a removable cover.

7. A portable coffee capsule machine with an intelligent temperature control plate structure according to claim 1, characterized in that, The coffee compartment (5) is a detachable compartment that is rotatably fastened to the capsule puncture extraction section (4).

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