CN219042661U

CN219042661U - Portable coffee machine

Info

Publication number: CN219042661U
Application number: CN202222533740.4U
Authority: CN
Inventors: 严杰波; 梁波
Original assignee: Ningbo Kaibo Group Co Ltd
Current assignee: Ningbo Kaibo Kaika Technology Co.,Ltd.
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-05-19
Anticipated expiration: 2032-09-21

Abstract

The utility model discloses a portable coffee machine, which belongs to a coffee brewing electric appliance, wherein the existing portable coffee machine or anhydrous heating function is not reasonable in structural layout, the occupation space of a hot water pipe assembly is large, and the water temperature is not easy to control. Therefore, no matter how much water is stored in the water tank, the heating device can always heat the water effectively, the water temperature is consistent by utilizing convection of the water, cold water can be heated to a set temperature under the control of the temperature controller, and a coffee beverage with good quality can be brewed. The utility model has reasonable structural layout and small occupied space of the heating device, so that the product can have smaller volume.

Description

Portable coffee machine

Technical Field

The utility model belongs to a coffee brewing electric appliance, and particularly relates to a portable coffee machine.

Background

Common coffee machine, whether domestic or commercial, is desk-top structure mostly, and is bulky, and the structure is complicated, only can fixed use, is difficult to hand-carry.

US patent No. US10219647B2 discloses a portable coffee brewing apparatus which requires pumping water from the lower part upwards by a water pump through a tube, brewing coffee in the upper part of the apparatus, the waterway being complex, and there is a risk of water leakage. Moreover, the solution configures a hot water pipe assembly for heating the cold water flowing therethrough. The portable coffee brewing device is unreasonable in structural layout, and the hot water pipe assembly occupies large space and is not easy to control the water temperature.

The Chinese patent with the authorized bulletin number of CN215077565U discloses a portable coffee machine, which comprises a storage chamber cover, a water storage chamber, a water pumping device, a storage part and a water cup, wherein the storage chamber cover, the water storage chamber, the water pumping device, the storage part and the water cup are sequentially and adaptively arranged; the water storage chamber is communicated with the storage part through a water pumping device, and after the water pumping device is started, water stored in the water storage chamber is pumped to the storage part and flows to the water cup through the storage part; the portable and outdoor use is convenient, the disassembly and the installation are also convenient, and the cleaning and the sanitation are kept; the infusible is not limited to solid beverages of capsule coffee, and the user does not need to carry multiple dedicated devices. When the coffee machine is used, a user only needs to place capsule coffee or other solid beverages in the storage chamber, pour water into the water storage chamber, then install and fix all the components, start the coffee machine, enable the water to enter the storage chamber from the water storage chamber along the water pipe to brew the capsule coffee, enable the brewed coffee liquid to flow into the water cup from the leak hole, and enable the water cup to be drunk after screwing, so that the portable drinking effect can be achieved, and the purpose of brewing and drinking at any time and any place can be achieved. Accordingly, the coffee machine of this solution does not have the function of heating the water, which is required to be poured into the water storage chamber when brewing coffee, and therefore has limited use.

Disclosure of Invention

The utility model aims to solve the technical problems and the technical task of the utility model to overcome the defects of the existing portable coffee machine that the anhydrous heating function and the hot water pipe assembly occupy large space and the water temperature is not easy to control, provide the portable coffee machine which has the advantages of simple structure, high heating efficiency and easy control of the water temperature, simplify the water conveying structure on the basis and avoid water leakage.

In order to achieve the above object, the portable coffee machine of the present utility model comprises a water tank, a main machine and a container assembled together from top to bottom, wherein the top of the water tank is provided with a cover, the container is detachably connected to the lower end of the main machine, and the main machine is provided with a water pump and is connected with a detachable brewing restraint member, and the portable coffee machine is characterized in that: the bottom of the water tank is provided with a heating device for heating the water stored in the water tank, the host is provided with a switch and a temperature controller, the heating device heats the water stored in the water tank and is controlled to be at a set temperature by the temperature controller after the coffee machine is started through the switch, and then the water pump conveys the water stored in the water tank to the brewing constraint piece.

In view of this, no matter how much water is stored in the water tank, the heating device can always heat water effectively, the convection of water is utilized to make the water temperature consistent, and cold water can be heated to the set temperature under the control of the temperature controller, so that the coffee beverage with good quality can be brewed. Moreover, in the case of a fixed quantity of coffee powder, the user can add a small amount of water for brewing a stronger-tasting coffee beverage or a large amount of water for brewing a weaker-tasting coffee beverage according to his preference, or a uniform-tasting coffee beverage by controlling the system to output a fixed quantity of hot water.

In one embodiment, the heating device is a bottom surface of the water tank and comprises a heat conducting bottom plate and an electric heater attached to the lower side of the bottom plate, and the electric heater is electrically connected with a control circuit of the host machine. Therefore, the heating device has a simple structure and can effectively heat. In particular, in one embodiment, the electric heater is an electric heat generating sheet printed on the lower surface of the base plate.

In one embodiment, the temperature controller comprises a first thermistor with a negative temperature coefficient and a second thermistor, wherein the first thermistor is used for controlling water temperature, and the second thermistor is used for controlling an electric heating sheet. Therefore, the control circuit can determine the temperature of water according to the resistance value of the first thermistor and the temperature of the electric heating sheet according to the resistance value of the second thermistor, so that the water temperature is controlled at a set temperature, and the situation that the temperature of the electric heating sheet is too high (such as when water is lack for dry heating) is avoided.

In one embodiment, the metal shell of the first thermistor is provided with a first lead, the metal shell of the second thermistor is provided with a second lead, and the first lead and the second lead are connected to a control circuit of the host computer and used for sensing whether water exists in the water tank or not. When water exists in the water tank, the resistance value between the first lead and the second lead is smaller due to the conductive property of the water, and when water is lacking in the water tank, the resistance value between the first lead and the second lead is larger, so that whether the water exists in the water tank can be judged.

In one embodiment, the first thermistor protrudes out of the water tank through the bottom of the water tank and is used for accurately sensing and controlling the water temperature, and the second thermistor contacts the electric heating sheet and is positioned outside the water tank and is used for accurately sensing and controlling the temperature of the electric heating sheet.

In one embodiment, the bottom of the water tank is provided with a water outlet so as to facilitate the downward flow of the stored water in the water tank, the water pump is connected with the water outlet through the water inlet channel, the water pump is connected with the brewing constraint piece through the water outlet channel, and the water pump saves labor and energy consumption during water delivery.

In one embodiment, a one-way water delivery structure is arranged between the water inlet channel and the water outlet channel of the water pump, and the one-way water delivery structure controls water to flow from the water inlet channel to the water outlet channel.

In one embodiment, in order to reduce the connection position of the water delivery path to reduce the potential water leakage position, the upper end of the water pump is provided with an upper cover and a lower cover which are assembled together, the water inlet channel is a rigid pipe and extends upwards from the upper cover to the water outlet, and the water outlet channel is formed between the upper cover and the lower cover. Accordingly, the water is conveyed by the structure of the water pump, and water pipes do not need to be connected between the water pump and the water tank and between the water pump and the brewing constraint piece.

In one embodiment, the brewing constraint is rotationally snapped into the host machine to detach and mount the brewing constraint from and to the host machine.

In one embodiment, the host is provided with a first puncture tube, the brewing constraint piece is provided with a second puncture tube, the brewing constraint piece is suitable for placing a coffee powder packet, when the brewing constraint piece is connected to the host with the coffee powder packet therein, the first puncture tube and the second puncture tube are both used for puncturing the coffee powder packet, and water conveyed by the water pump flows into the coffee powder packet through the first puncture tube and flows out of the coffee powder packet to the container through the second puncture tube. Whereby a coffee beverage can be brewed.

In one embodiment, the water pump and the brewing constraint are located in parallel within the main machine, the main machine has an annular wall, and neither the water pump nor the brewing constraint is lower than the lower end of the annular wall. When the container is taken down from the host, the water pump and the brewing restraint piece are not protruded out of the lower end of the annular wall, so that the annular wall of the host can be stably placed at a proper position such as a platform, the water tank is kept upright, and water leakage caused by inclination or toppling of the water tank is avoided.

In one embodiment, the container is attached to the lower end of the annular wall.

In one embodiment, the host comprises a first part and a second part which are assembled together, wherein a circuit board is arranged in the first part, the water pump and the brewing restraint member are arranged in the second part, and the water tank is connected to the upper end of the first part in a sealing way.

In one embodiment, the host configures a charging interface for charging the coffee machine.

According to the coffee machine, the heating device for heating the water stored in the water tank is arranged at the bottom of the water tank, the host is provided with the switch and the temperature controller, the heating device heats the water stored in the water tank after the coffee machine is started through the switch and is controlled to be at a set temperature by the temperature controller, and then the water pump conveys the water stored in the water tank to the brewing constraint piece. Therefore, no matter how much water is stored in the water tank, the heating device can always heat the water effectively, the water temperature is consistent by utilizing convection of the water, cold water can be heated to a set temperature under the control of the temperature controller, and a coffee beverage with good quality can be brewed.

The utility model has reasonable structural layout and small occupied space of the heating device, so that the product can have smaller volume.

Drawings

FIG. 1 is an isometric view of a portable coffee machine of the present utility model;

FIG. 2 is a schematic front view of the portable coffee machine of FIG. 1;

FIG. 3 is a cross-sectional view taken along the direction A-A of FIG. 2;

FIG. 4 is a B-B cross-sectional view of FIG. 3;

FIG. 5 is a cross-sectional view taken along the direction C-C of FIG. 3;

FIG. 6 is a schematic view of the portable coffee machine of FIG. 1 with the lid open;

FIG. 7 is a schematic view of the portable coffee machine of FIG. 1 with the container removed;

FIG. 8 is a schematic view of the portable coffee machine of FIG. 1 with the pod and brewing restraint removed;

FIG. 9 is a schematic diagram of another view of the structure of FIG. 8;

FIG. 10 is an exploded view of the main body of the portable coffee machine of FIG. 1;

FIG. 11 is a schematic view of another view of the structure of FIG. 10;

the reference numerals in the figures illustrate:

100 water tank: 101 covers, 102 heat conduction bottom plates, 103 electric heaters, 104 water outlets, 105 box bodies and 106 sealing members;

200 host:

210 water pump, 211 water inlet channel, 212 water outlet channel, 213 upper cover, 214 lower cover,

220 switch

230, a first thermistor, 231 a first lead,

240 a second thermistor, 232 a second lead,

250 a first piercing tube is provided with a first piercing tip,

260 first portion, 261 circuit board, 262 charging interface, 263 temperature circuit breaker, 264 thermal shield,

270 second portion, 271 surrounding wall, 272 circumferential bead

A container 300 of which the shape of the container is a shape,

400 brewing restraint, 401 second puncture tube, 402 notch, 403 circumferential groove

500 coffee powder packet.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms "comprises" and "comprising" and any variations thereof, in the description and claims, are intended to cover a non-exclusive inclusion, such as a method or article, that comprises a list of features does not necessarily limit the features to those expressly listed, but may include other features not expressly listed that may be included in such method or article.

In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that the technical features defined by the terms "first", "second", etc. having sequential concepts are merely for the purpose of clearly describing the defined technical features, so that the defined technical features can be clearly distinguished from other technical features, and are not so named as to represent actual implementation, and thus should not be construed as limiting the present utility model.

The present utility model will be described in detail with reference to specific embodiments and drawings.

As shown in fig. 1 to 7, the coffee maker includes a water tank 100, a main body 200, and a container 300 assembled together from top to bottom, and is integrally embodied as a cup, so that the coffee maker is portable, which is called a portable coffee maker or a travel coffee maker.

The top of water tank 100 is provided with a cover 101, which can be opened as shown in fig. 6 to add water into the container. In view of the fact that water can be added into the water tank by opening the cover, the tank body 105 of the water tank is preferably sealed and fixedly assembled at the upper end of the main machine, specifically, the tank body is assembled at the upper end of the main machine through a sealing member 106 such as a sealing ring, a supporting ring and the like to realize sealing, so that the water stored in the water tank is prevented from leaking into the main machine.

The bottom of the water tank 100 is provided with a heating device for heating the water stored in the water tank, which is the bottom surface of the water tank. As shown in fig. 10-11, the electric heater comprises a heat conducting base plate 102 and an electric heater 103 attached to the lower side of the base plate, wherein the heat conducting base plate is made of stainless steel, the electric heater is electrically connected with a control circuit of a host, and the electric heater is an electric heating sheet printed on the lower surface of the base plate.

In order to control the water temperature, the main unit 200 is provided with a temperature controller including a first thermistor 230 having a negative temperature coefficient for controlling the water temperature and a second thermistor 240 for controlling the electric heating sheet. Specifically, the first thermistor 240 protrudes from the bottom of the water tank to accurately sense and control the water temperature, for example, the first thermistor is set to control the water temperature to 92 ℃, and when the water temperature reaches 92 ℃, the control circuit controls the electric heating sheet to stop heating. The second thermistor 240 is in contact with the electric heating sheet and is located outside the water tank, and is used for accurately sensing and controlling the temperature of the electric heating sheet, for example, when the temperature of the electric heating sheet is set to be 200 ℃, and the temperature of the electric heating sheet is higher than 200 ℃ (for example, when water is lack in the water tank to cause dry heating), the control circuit controls the electric heating sheet to stop heating. Therefore, the temperature can be ensured to be constant, dry burning is avoided, and the safety of the heating circuit is ensured. Further, the metal casing of the first thermistor is provided with a first lead 231, the metal casing of the second thermistor is provided with a second lead 241, and the first lead and the second lead are connected to a control circuit of the host computer for sensing whether water exists in the water tank. When water exists in the water tank, the resistance value between the first lead and the second lead is smaller due to the conductive property of the water, and when water is lacking in the water tank, the resistance value between the first lead and the second lead is larger, so that whether the water exists in the water tank can be judged.

The bottom of the water tank is provided with a water outlet 104, and specifically, the water outlet 104 is arranged on the heat conducting bottom plate 102.

The main unit 200 is provided with a water pump 210 and is connected to a detachable brewing constraint 400. The main machine 200 is also provided with a switch 220, the heating device heats the water stored in the water tank by starting the coffee machine through the switch and is controlled at a set temperature by the temperature controller, and then the water pump conveys the water stored in the water tank to the brewing constraint piece.

The host 200 includes a first portion 260 and a second portion 270 that fit together, the first portion and the second portion being butted together and fastened together via fasteners.

A circuit board 261, which is a control circuit constituent part, is disposed in the first portion 260, and the switch 220 is disposed on the circuit board 261 and exposed to the side surface of the first portion 260. The control circuit further comprises a temperature breaker 263 connected to the circuit board by wires and the first and second thermistors, the temperature breaker preferably being connected in series in the power supply circuit of the electric heating plate for breaking the power supply circuit when the electric heating plate is overheated. The first part is also provided with a charging interface 262 for connecting a charger for charging an electrical storage device, such as a super capacitor or a battery. In order to avoid the influence of the heat of the electric heating plate on the circuit board, a heat insulation plate 264 is arranged between the heat conduction bottom plate 102 and the circuit board 261, and the first thermistor, the second thermistor and the temperature breaker are positioned or exposed on the upper side of the heat insulation plate because of the need of detecting the temperature. The water tank is connected to the upper end of the first part in a sealing way.

The water pump 210 and the brew restraint 400 are disposed within the second portion 270. And the water pump and the brewing constraint are juxtaposed in a second portion of the main machine having a circumferential wall 271, neither the water pump 210 nor the brewing constraint 400 being lower than the lower end of the circumferential wall, so as to place the lower end of the circumferential wall at a platform or the like for placement of the coffee machine with the container removed.

The water pump 210 is connected with the water outlet 104 through the water inlet channel 211, and the water pump 200 is connected with the brewing restraint 400 through the water outlet channel 212. Specifically, the upper end of the water pump 210 is provided with an upper cover 213 and a lower cover 214 which are assembled together, and the water inlet channel 211 is a rigid pipe and extends upward from the upper cover through the circuit board and the heat insulation board to extend to the water outlet of the water tank and is connected with the water outlet in a sealing way. The water outlet passage 212 is formed between the upper and lower covers. In order to avoid water leakage, the upper cover and the lower cover are sealed by a sealing gasket.

A one-way water delivery structure is arranged between the water inlet channel and the water outlet channel of the water pump, and the one-way water delivery structure controls water to flow from the water inlet channel to the water outlet channel. As an example, the water pump is a plunger pump, a first one-way valve is arranged in the water inlet channel and controls water flow from the water tank to the water pump, a second one-way valve is arranged in the water outlet channel and controls water flow from the water pump to the brewing constraint piece, when the valve plug of the plunger pump moves downwards, the first one-way valve opens the water inlet channel, the second one-way valve closes the water outlet channel, and the water pump absorbs water from the water tank through the water inlet channel; when the sliding plug of the plunger pump moves upwards, the first one-way valve closes the water inlet channel, the second one-way valve opens the water outlet channel, and the water pump transmits water to the brewing constraint piece through the water outlet channel. Therefore, the water storage of the water tank can be pressurized and conveyed to the brewing constraint piece through the up-and-down repeated movement of the valve plug of the plunger pump.

The brewing constraint 400 is rotationally snapped within the second portion 270. As shown in fig. 8-9, the brewing constraint 400 is in the form of an open cup with a pressure balance hole in the bottom and a continuous notch 402 and circumferential groove 403 in the upper edge and a circumferential rib 272 in the second portion, so that the brewing constraint can be connected in the second portion by moving the brewing constraint upward and rotating it, and the brewing constraint can be removed by rotating it in the opposite direction and moving it downward.

The first puncture tube 250 extending downwards is arranged in the second part of the host machine, the brewing constraint piece 400 is provided with the second puncture tube 401 extending upwards, the brewing constraint piece is suitable for placing the coffee powder package 500 (such as a commercial name coffee capsule), when the coffee powder package in the brewing constraint piece is connected to the host machine, the first puncture tube pierces the coffee powder package from the upper direction to the lower direction, the second puncture tube pierces the coffee powder package from the lower direction, water conveyed by the water pump flows into the coffee powder package through the water outlet channel and the first puncture tube and flows out of the coffee powder package to the container through the second puncture tube, and when the hot water flows through the coffee powder package, the coffee powder in the coffee powder package is brewed (extracted) into a coffee beverage to flow to the container, and quantitative water delivery can be carried out to prepare quantitative coffee beverage.

The container 300 may be removably attached to the lower end of the main body, such as by threading the container onto the lower end of the annular wall, or may be configured to be attached to the lower end of the annular wall, such as by a brew-holding element attached to the second portion.

Claims

1. The portable coffee machine comprises a water tank (100), a host machine (200) and a container (300) which are assembled together from top to bottom, wherein a cover (101) is arranged at the top of the water tank, the container is detachably connected to the lower end of the host machine, and the host machine is provided with a water pump (210) and is connected with a detachable brewing restraint piece (400), and the portable coffee machine is characterized in that: the bottom of the water tank is provided with a heating device for heating the water stored in the water tank, the host is provided with a switch (220) and a temperature controller, the heating device heats the water stored in the water tank and is controlled to be at a set temperature by the temperature controller after the coffee machine is started through the switch, and then the water pump conveys the water stored in the water tank to the brewing constraint piece.

2. A portable coffee machine as claimed in claim 1, characterized in that: the heating device is the bottom surface of the water tank and comprises a heat conduction bottom plate (102) and an electric heater (103) attached to the lower side of the bottom plate, and the electric heater is electrically connected with a control circuit of the host machine.

3. A portable coffee machine as claimed in claim 2, characterized in that: the electric heater (103) is an electric heating sheet printed on the lower surface of the bottom plate.

4. A portable coffee machine according to any one of claims 1-3, characterized in that: the temperature controller comprises a first thermistor (230) with a negative temperature coefficient and a second thermistor (240), wherein the first thermistor is used for controlling water temperature, and the second thermistor is used for controlling an electric heating sheet.

5. The portable coffee machine of claim 4, wherein: the metal shell of the first thermistor is provided with a first lead (231), the metal shell of the second thermistor is provided with a second lead (241), and the first lead and the second lead are connected to a control circuit of the host computer and used for sensing whether water exists in the water tank or not.

6. The portable coffee machine of claim 4, wherein: the first thermistor (230) protrudes out of the water tank through the bottom of the water tank, and the second thermistor (240) is contacted with the electric heating sheet and is positioned outside the water tank.

7. A portable coffee machine as claimed in claim 1, characterized in that: the bottom of the water tank is provided with a water outlet (104), a water pump is connected with the water outlet (104) through a water inlet channel (211), and the water pump is connected with the brewing constraint piece (400) through a water outlet channel (212).

8. The portable coffee machine of claim 7, wherein: a one-way water delivery structure is arranged between a water inlet channel (211) and a water outlet channel (212) of the water pump, and the one-way water delivery structure controls water to flow from the water inlet channel to the water outlet channel.

9. The portable coffee machine of claim 7, wherein: an upper cover (213) and a lower cover (214) are assembled together at the upper end of the water pump, the water inlet channel (211) is a rigid pipe and extends upwards from the upper cover to the water outlet (104), and the water outlet channel is formed between the upper cover and the lower cover.

10. A portable coffee machine as claimed in claim 1, characterized in that: the brewing restraint (400) is rotationally clamped in the host.

11. Portable coffee machine according to claim 1 or 10, characterized in that: the host is provided with a first puncture tube (250), the brewing constraint piece is provided with a second puncture tube (401), the coffee powder bag (500) is placed in the brewing constraint piece, the coffee powder bag is connected to the host through the brewing constraint piece, when the coffee powder bag is connected to the host, the first puncture tube and the second puncture tube are both penetrated into the coffee powder bag, and water conveyed by the water pump flows into the coffee powder bag through the first puncture tube and flows out of the coffee powder bag to the container through the second puncture tube.

12. A portable coffee machine as claimed in claim 1, characterized in that: the water pump (210) and the brewing restraint (400) are positioned in parallel in the host machine, the host machine is provided with a circular wall (271), and the water pump and the brewing restraint are not lower than the lower end of the circular wall.

13. A portable coffee machine as claimed in claim 12, characterized in that: the container (300) is connected to the lower end of the annular wall (271).

14. A portable coffee machine as claimed in claim 1, characterized in that: the main machine comprises a first part (260) and a second part (270) which are assembled together, wherein a circuit board (261) is arranged in the first part, the water pump and the brewing restraint piece are arranged in the second part, and the water tank is connected to the upper end of the first part in a sealing way.

15. A portable coffee machine as claimed in claim 1, characterized in that: the host configures a charging interface (262).