Cold extraction coffee pot

Abstract

The utility model belongs to the technical field of household appliances, and provides a cold extraction coffee pot which comprises a pot body and a pot cover connected with the pot body in a covering mode, an opening is formed in the top of the pot body, and the opening extends downwards to form a containing cavity. The kettle cover comprises a cover body and a filter element, the cover body comprises an upper cover and a lower cover, the upper cover and the lower cover are fixedly connected in a buckled mode, a gear motor is fixedly arranged between the upper cover and the lower cover, the gear motor is electrically connected with a power source through a control panel, the filter element comprises an element body and a filter element cover, and a rotating shaft of the gear motor penetrates through the lower cover to be detachably and fixedly connected with the filter element cover. The core body is of a cylindrical structure with an opening in the top, and the filter element cover is detachably connected with the core body in a buckling manner. The cold extraction coffee pot is relatively simple in structure, circulation of water inside and outside the filter screen is achieved only through the rotating core body, compared with the prior art, the cold extraction efficiency of coffee can be effectively improved, the time needed by cold extraction is shortened, and meanwhile due to the fact that only the core body and the pot body are components making contact with water, the cold extraction coffee pot is easier to clean.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a cold brew coffee maker. Background Technology

[0002] Coffee is a widely popular everyday beverage, and people typically encounter two methods: brewing and pour-over. Pour-over requires more experience from the operator, while brewing can be standardized and streamlined by machines, making it more convenient and faster. Among existing brewing techniques, cold brew is gradually gaining popularity in the consumer market due to its advantages of low acidity and smooth taste. Existing cold brew coffee devices are mostly infusion filters or filters with circulation pumps. For example, Chinese utility model patent CN217185707U discloses a cold brew machine, which includes an inner cup, an outer cup, a water pump, and a cooler. The inner cup has at least one water outlet, and the inner cup is connected to the outer cup through the water outlet. One end of the water pump is connected to the outer cup through a water inlet pipe, and the other end is connected to one end of the cooler through a drain pipe. The other end of the cooler is connected to the inner cup through a water inlet pipe. When using this cold brew machine, tea leaves or coffee are placed in the inner cup, and drinking water is added to the outer cup. The drinking water in the outer cup flows into the water pump through the water inlet pipe, enters the cooler under the action of the water pump, and then enters the inner cup to extract the tea leaves or coffee. When the water level reaches a preset height, the drinking water flows out from the water outlet and into the outer cup. This cycle is repeated to repeatedly extract the tea leaves or coffee.

[0003] This extraction device has a water pump and related pipelines, which are complex and difficult to clean. Moreover, its filtration is achieved through natural leaching from the inner cup, resulting in low extraction efficiency of the coffee's components and a long time required to reach the required extraction rate, making it unsuitable for consumers' daily use. Summary of the Invention

[0004] The purpose of this invention is to develop a cold extraction device with a simpler structure, easier cleaning, and higher leaching efficiency. The specific technical solution is as follows:

[0005] This utility model provides a cold brew coffee maker, including a pot body and a lid connected thereto. The pot body has an opening at the top, which extends downward to form a receiving cavity. The lid includes a cover body and a filter element. The cover body includes an upper cover and a lower cover, which are fastened and fixedly connected. A geared motor is fixedly installed between the upper cover and the lower cover. The geared motor is electrically connected to a power source through a control board. The filter element includes a core body and a filter element cover. The shaft of the geared motor passes through the lower cover and is detachably and fixedly connected to the filter element cover. The core body is a cylindrical structure with an open top, and the filter element cover is detachably fastened and connected to the core body.

[0006] Optionally, the top outer side of the kettle body is provided with a snap-fit ​​part, which extends downward to form a handle, and the outer side of the upper cover is provided with a downward-extending limiting plate, which is provided with a slot that matches the snap-fit ​​part.

[0007] Optionally, the side wall of the core is provided with a filter screen mounting frame, and a filter screen is fixedly installed in the filter screen mounting frame.

[0008] Optionally, the filter screen has a pore size of 200-400 mesh.

[0009] Preferably, the filter screen has a pore size of 300 mesh.

[0010] Optionally, the filter element cover is provided with a connecting boss, and a connecting through hole is provided on the connecting boss. The shaft of the geared motor is sleeved in the connecting through hole and detachably fixed to the filter element cover by fixing screws. The bottom of the lower cover is provided with a sleeve groove, and a plastic bearing is sleeved in the sleeve groove. The inner ring of the plastic bearing is sleeved and connected to the connecting boss of the filter element cover.

[0011] Optionally, a sealing ring is also fitted onto the outer side of the shaft of the geared motor.

[0012] Optionally, the bottom of the filter cover is provided with a core receiving groove, the side wall of the core receiving groove is provided with a locking protrusion, and the top outer side wall of the core is provided with an L-shaped locking groove, the locking protrusion and the L-shaped locking groove are rotatably connected.

[0013] Optionally, a waterproof gasket is provided on the bottom outer side of the lower cover.

[0014] Optionally, the power source is a lithium-ion battery pack, the control board is provided with a charging interface, the side wall of the top cover is provided with a charging through hole, and the charging interface is sleeved in the charging through hole.

[0015] Optionally, the control panel is provided with a switch and a power display screen, the upper cover is provided with a switch through hole and a power display screen window, the switch protrudes from the upper cover through the switch through hole, the power display screen is sleeved inside the power display screen window, the upper cover is also provided with a transparent plastic plate, and the transparent plastic plate is also provided with a slot that matches the switch through hole.

[0016] The beneficial effects of this utility model are:

[0017] The cold brew coffee maker of this embodiment has a relatively simple structure. It only requires a rotating core to achieve water circulation inside and outside the filter. Compared with the prior art, it can not only effectively improve the efficiency of cold brewing coffee and shorten the time required for cold brewing, but also, since only the core and the pot body are in contact with water, it is easier to clean and convenient for consumers' daily use. It can effectively solve the problems existing in the prior art. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a cold brew coffee maker according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the lid removal state of a cold brew coffee maker according to an embodiment of the present invention;

[0020] Figure 3 This is an exploded view of the parts of a cold brew coffee maker according to an embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional view of the lid of a cold brew coffee maker according to an embodiment of the present invention;

[0022] Figure 5 This is an enlarged view of an L-shaped slot for a cold brew coffee maker according to an embodiment of the present invention.

[0023] Explanation of icon numbers:

[0024] 01 Kettle body, 011 Opening, 012 Receiving cavity, 013 Snap-fit ​​part, 014 Handle, 02 Lid, 021 Lid body, 022 Top cover, 023 Bottom cover, 025 Charging hole, 026 Socket groove, 027 Plastic bearing, 028 Limiting plate, 029 Slot, 030 Waterproof gasket, 031 Switch hole, 032 Power display window, 033 Transparent plastic plate, 035 Slot, 05 Filter element, 051 Core, 052 Filter Core cover, 053 connecting boss, 054 connecting through hole, 055 core receiving groove, 056 locking protrusion, 057 L-shaped locking groove, 058 filter screen mounting frame, 059 filter screen, 060 anti-detachment limiting protrusion, 06 geared motor, 061 rotating shaft, 062 threaded connection hole, 063 sealing ring, 07 control board, 071 control switch, 072 charging interface, 073 power display screen, 08 power supply, A open end, B corner, C blind end.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The following specific examples, in conjunction with the accompanying drawings, illustrate the embodiments of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific examples, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0027] This utility model provides a cold brew coffee maker (hereinafter referred to as the cold brew coffee maker), which has the following structural features:

[0028] like Figures 1 to 5 As shown, this cold brew coffee maker includes a pot body 01 and a lid 02 connected to it. The top of the pot body 01 has an opening 011, which extends downwards to form a receiving cavity 012. The opening is used to add water or other extraction liquids, which are stored in the receiving cavity for subsequent extraction. The lid 02 includes a lid body 021 and a filter element 05. The lid body 021 includes an upper cover 022 and a lower cover 023, which are fixedly connected by screws and screw fasteners. A geared motor 06 is fixedly installed between the upper cover 022 and the lower cover 023. The geared motor 06 is electrically connected to a power supply 08 via a control board 07. The control board 07 also has a control switch 071, which controls the connection and disconnection of the electrical connection. The power supply can be a plug for connecting to an external power source or a battery pack, preferably a rechargeable lithium-ion battery pack. When the power source is a lithium-ion battery pack, the control board 07 is provided with a charging interface 072, and the side wall of the upper cover 022 is provided with a charging through hole 025. The charging interface 072 is sleeved in the charging through hole 025 for easy connection to an external charging power interface. The filter element 05 includes a core 051 and a filter element cover 052. The shaft 061 of the geared motor 06 passes through the lower cover 023 and is detachably and fixedly connected to the filter element cover 052. Specifically, the filter element cover 052 is provided with a connecting boss 053, and the connecting boss 053 is provided with a connecting through hole 054. The shaft 061 of the geared motor 06 is sleeved in the connecting through hole 054. The shaft has a threaded connection hole 062, and the shaft is detachably and fixedly connected to the filter element cover 052 by a fixing screw (not shown). The filter element cover 052 and the core body 051 are detachably fastened together. Specifically, the bottom of the filter element cover 052 is provided with a core body receiving groove 055, and the side wall of the core body receiving groove 055 is provided with a locking protrusion 056. The core body 051 is a cylindrical structure with an open top, and the outer side wall of the top of the core body 051 is provided with an L-shaped locking groove 057. The locking protrusion can enter through the open end A of the L-shaped locking groove. When the locking protrusion enters the corner B of the L-shaped locking groove, the core body is rotated so that the locking protrusion engages with the blind end C of the L-shaped locking groove, thereby realizing the rotatable locking connection between the locking protrusion and the L-shaped locking groove. The side wall of the core body 051 is provided with a filter screen mounting frame 058, and a filter screen 059 is fixedly installed in the filter screen mounting frame 058. Since pour-over coffee is typically made with a medium grind, the coffee powder has a particle size of 500-700 micrometers. The filter screen has a pore size of 200-400 mesh, which can intercept most coffee particles, ensuring the extraction of the coffee powder's contents while maintaining the purity of the extract. When the filter screen has a pore size of 300 mesh, the filter cartridge is more adaptable to a wider range of coffee powder particle sizes. To facilitate better filtration of the coffee extract when the cartridge is removed, a filter screen is also provided at the bottom of the cartridge.

[0029] During use, remove the filter cartridge and add an appropriate amount of coffee powder into the opening at the top of the cartridge. Insert the top of the cartridge into the cartridge receiving groove at the bottom of the filter cartridge cover, ensuring that the locking protrusion of the filter cartridge cover is engaged in the L-shaped locking groove. Rotate the cartridge to engage the locking protrusion with the blind end C of the L-shaped locking groove, completing the rotating snap-fit ​​connection between the cartridge and the filter cartridge cover. Since the filter cartridge cover and the cover body's geared motor shaft are fixedly connected, the cartridge and cover body are now connected via the rotating snap-fit ​​of the filter cartridge cover. Pour an appropriate amount of water into the opening of the pot, and then close the lid with the filter cartridge onto the opening of the pot, ensuring that the water in the pot covers the coffee powder particles inside the filter cartridge. Turn on the control switch on the control panel, and the geared motor will rotate, causing the filter cartridge cover and the filter cartridge to rotate in the water in the pot's containment cavity. During the rotation, the water around the coffee powder particles flows faster. Under the centrifugal force generated by the rotation of the filter cartridge, the water inside the filter cartridge flows out through the filter screen. At the same time, because the water pressure at the bottom of the filter cartridge is higher than that at the top, the water inside the filter cartridge also flows from top to bottom. Simultaneously, the water flowing out of the filter screen raises the water level outside the filter screen, meaning that the water pressure outside the filter screen is higher than that inside the filter screen. Therefore, the water outside the filter screen enters the filter cartridge from the top of the filter cartridge, forming a circulation. This circulation further accelerates the leaching of the contents of the coffee powder particles, effectively improving the extraction efficiency of cold brew coffee.

[0030] This cold brew coffee maker has a relatively simple structure. It only requires the rotating core to achieve water circulation inside and outside the filter. Compared with existing technologies, it can not only effectively improve the efficiency of cold brewing coffee and shorten the time required for cold brewing, but also make it easier to clean and convenient for consumers' daily use because only the core and the pot body come into contact with water.

[0031] It is worth noting that the speed of the geared motor is in the range of 100-300 rpm. When the core rotates within this range, it is not easy for cavitation to be generated inside. In addition, the control module of the control board can control the geared motor to rotate in both forward and reverse directions alternately. This rotation mode can prevent coffee powder from sticking to the wall and further improve the extraction efficiency of cold brew coffee.

[0032] Furthermore, to prevent the core from detaching from the filter cover, the near-blind end C of the L-shaped slot is provided with an anti-detachment limiting protrusion 060. When the filter cover rotates excessively relative to the core, causing the protrusion to jump over the anti-detachment limiting protrusion and enter the near-blind end, in this state, if the core is not subjected to a large reverse torque, the protrusion will not easily jump over the anti-detachment limiting protrusion and fall off, thereby preventing the core from detaching from the filter cover.

[0033] To reduce vibration during rotation of the filter element cover, in one embodiment, the bottom of the lower cover 023 is provided with a sleeve groove 026, and a plastic bearing 027 is sleeved within the sleeve groove 026. The inner ring of the plastic bearing 027 is sleeved and connected to the connecting boss 053 of the filter element cover 052. The plastic bearing further assists the rotation of the filter element cover, making its rotation process more stable and preventing wobbling.

[0034] To prevent the lid from shaking during the rotation of the geared motor, in one embodiment, a locking part 013 is provided on the outer top of the kettle body 01. The locking part 013 extends downward to form a handle 014. A limiting plate 028 extending downward is provided on the outer side of the upper cover 022. The limiting plate 028 is provided with a groove 029 that matches the locking part. When the lid is closed on the opening of the kettle body, the locking part is engaged with the groove of the limiting plate. When the geared motor is started, the lid will not shake due to the mutual locking and limiting effect of the locking part and the groove.

[0035] To prevent water from entering the lid during use, in one embodiment, a sealing ring 063 is also fitted on the outside of the shaft 061 of the geared motor 06, and the sealing ring is placed inside the shaft through hole of the lower cover.

[0036] To prevent water from splashing out of the kettle during use, in one embodiment, a waterproof gasket 030 is provided on the outer bottom of the lower cover 023. The waterproof gasket can seal the gap between the lower cover and the inner wall of the kettle, effectively preventing water from splashing out of the kettle during use.

[0037] In one embodiment, the control board is provided with a switch 071 and a power display screen 073. The upper cover 022 is provided with a switch through hole 031 and a power display screen window 032. The switch 071 protrudes from the upper cover through the switch through hole 031. The power display screen 073 is sleeved within the power display screen window 032. The upper cover 022 is also provided with a transparent plastic plate 033, which is provided with slots 035 that match the switch through hole 031. The transparent plastic plate is used to protect the power display screen, which is used to display the power level of the lithium-ion battery pack.

[0038] It should also be noted that the cold brew coffee maker of this invention can also be used for extracting the contents of other particulate substances, such as tea leaves.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A cold brew coffee maker comprising a body and a lid connected to the body, characterized in that, The top of the kettle body is provided with an opening which extends downward to form a containing cavity; the kettle cover comprises a cover body and a filter core, the cover body comprises an upper cover and a lower cover which are fixedly connected by buckling, a reduction motor is fixedly arranged between the upper cover and the lower cover, the reduction motor is electrically connected with a power supply through a control panel, the filter core comprises a core body and a filter core cover, a rotating shaft of the reduction motor is detachably fixedly connected with the filter core cover through the lower cover, the core body is a cylindrical structure with an open top, and the filter core cover is detachably buckled with the core body.

2. The cold brew coffee maker of claim 1, wherein, The top outer side of the kettle body is provided with a clamping portion which extends downward to form a handle, the outer side of the upper cover is provided with a downward extending limiting clamping plate which is provided with a clamping groove matched with the clamping portion.

3. The cold brew coffee maker of claim 1, wherein, The side wall of the core body is provided with a filter screen mounting frame, and a filter screen is fixedly mounted in the filter screen mounting frame.

4. The cold brew coffee maker of claim 3, wherein, The pore size of the filter screen is 300 meshes.

5. The cold brew coffee maker of claim 1, wherein, The filter core cover is provided with a connecting boss, a connecting through hole is arranged on the connecting boss, a rotating shaft of the reduction motor is sleeved in the connecting through hole and detachably fixedly connected with the filter core cover through a fixing screw, the bottom of the lower cover is provided with a sleeving groove, a plastic bearing is sleeved in the sleeving groove, and the inner ring of the plastic bearing is sleeved with the connecting boss of the filter core cover.

6. The cold brew coffee maker of claim 5, wherein, The outer side of the rotating shaft of the reduction motor is further sleeved with a sealing ring.

7. The cold brew coffee maker of claim 1, wherein, The bottom of the filter core cover is provided with a core body containing groove, the side wall of the core body containing groove is provided with a clamping protrusion, the outer side wall of the top of the core body is provided with an L-shaped clamping groove, and the clamping protrusion and the L-shaped clamping groove are rotationally buckled.

8. The cold brew coffee maker of claim 1, wherein, The bottom outer side of the lower cover is provided with a waterproof gasket.

9. The cold brew coffee maker of claim 1, wherein, The power supply is a lithium ion battery pack, a charging interface is arranged on the control panel, a charging through hole is arranged on the side wall of the upper cover, and the charging interface is sleeved in the charging through hole.

10. The cold brew coffee maker of claim 9, wherein, A switch and an electric quantity display screen are arranged on the control panel, the upper cover is provided with a switch through hole and an electric quantity display screen window, the switch protrudes out of the upper cover through the switch through hole, the electric quantity display screen is sleeved in the electric quantity display screen window, and the upper cover is further provided with a transparent plastic plate, and a slot hole matched with the switch through hole is further arranged on the transparent plastic plate.

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