Coffee cold extraction equipment

Abstract

The utility model discloses coffee cold extraction equipment which comprises a cold extraction tank, a manhole, a glass window and a thermometer are arranged at the top of the cold extraction tank, a sealing cover is detachably connected to the manhole, a water inlet pipe is communicated with the cold extraction tank, a water inlet pump is arranged on the water inlet pipe, the water inlet pump is communicated with external cold extraction water, and a slag discharging opening is formed in the lower end of the cold extraction tank. A conical filtering device is hinged to the slag discharging opening, the conical filtering device comprises a filtering cover body and a conical filtering net assembly, the filtering cover body is hinged to the outer wall of the cold extraction tank and corresponds to the slag discharging opening, the conical filtering net assembly is arranged at one end of the filtering cover body, and the other end of the filtering cover body is detachably communicated with a liquid outlet pipe. According to the conical filter screen assembly, the contact area of coffee powder and water can be increased, coarse-particle coffee grounds are prevented from being accumulated on the filter screen, local blockage is reduced, the filtering efficiency is improved, meanwhile, water permeation is more uniform, flavor substances in coffee can be more sufficiently extracted, and the taste and fragrance of the coffee are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to coffee product production technical field, specifically is related to a coffee cold extraction equipment. BACKGROUND

[0002] Low temperature extraction can better preserve the natural flavor and aroma of coffee beans, and has been favored by the market in recent years. In low temperature extraction of coffee, ice water extraction is needed in low temperature. The main methods of industrialized coffee cold extraction in the industry at present are immersion type and dripping type. Immersion type cold extraction refers to pouring ground coffee powder into an extraction container and mixing it with cold water. After a period of standing or intermittent stirring, the coffee residue and the leaching liquid are separated to extract the extraction liquid. Dripping type cold extraction refers to pouring ground coffee powder into an extraction container with a filter screen at the bottom. Water is injected onto the surface of the coffee powder while the leaching liquid is filtered out through the filter screen at the bottom. The traditional cold extraction equipment in the industry adopts a flat filter screen structure, which has a limited contact area. This can easily cause the accumulation of coarse coffee particles on the surface of the filter screen, resulting in local blockage. This not only reduces the filtration efficiency, but also affects the full release of flavor substances due to uneven flow of the extraction liquid.

[0003] For example, the patent for cold extraction tank and coffee cold extraction system disclosed in Chinese patent No. CN215602982U, wherein the cold extraction tank includes a tank body, the top of the tank body is provided with a feed inlet, the bottom is provided with a discharge outlet, the tank body is provided with a filter screen, a spray ball and an atomizing nozzle inside; the filter screen is horizontally arranged and used for carrying coffee powder; the spray ball is arranged above the filter screen and used for spraying water into the tank body to soak the coffee powder; the atomizing nozzle is arranged above the filter screen and used for spraying atomized extractant on the surface of the soaked coffee powder. This patent uses a spray ball to soak the powder in the tank, and then uses an atomizing nozzle to spray water mist to extract. However, since the filter screen is a flat filter screen structure, it is easy to block during extraction, affecting the extraction efficiency. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to overcome the defects in the above background technology and provide a coffee cold extraction equipment.

[0005] In order to achieve the above object, the utility model provides a coffee cold extraction equipment, including cold extraction tank, the top of cold extraction tank is equipped with manhole, glass window and temperature table respectively, the manhole department can detachably connect with sealing cover, the cold extraction tank is connected with water inlet pipe, water inlet pump is equipped on water inlet pipe, the water inlet end of water inlet pump is connected with the outside cold extraction water, the lower extreme of cold extraction tank is equipped with the discharge port, the discharge port place is hinged with the conical filter device, the conical filter device includes filter cover body and conical filter screen subassembly, the filter cover body is hinged with the outer wall of cold extraction tank and corresponds with the discharge port, the conical filter screen subassembly is established on one end of filter cover body, the other end of filter cover body can detachably communicate with liquid outlet pipe. Through setting up the conical filter screen subassembly, compared with the traditional plane filter screen, the contact area of coffee powder and water can be increased, coarse particle coffee residue is avoided to accumulate on the filter screen, local blockage is reduced, and the filtering efficiency is improved.

[0006] Further optimize technical scheme, the conical filter screen subassembly includes support framework and conical filter screen, the conical filter screen is detachably covered on the support framework. The support framework provides stable support for the conical filter screen, maintains the overall shape of the conical filter screen, avoids the collapse of the conical filter screen, and affects the filtering effect.

[0007] Further optimize technical scheme, the support framework includes a fixed ring and a support rib, the bottom end of the support rib is evenly spaced around the fixed ring, the top end of the support rib is fixed together to form a cone structure, the conical filter screen is covered on the support rib, the inner side wall of the filter cover body is provided with a stepped surface, the fixed ring is arranged on the stepped surface, the conical filter screen is provided with an everted edge at the bottom edge, and a compression ring is detachably arranged above the everted edge, the stepped surface, the fixed ring and the compression ring are all provided with mounting screw holes, and the mounting screw holes are provided with fastening bolts. The compression ring presses the everted edge, the fastening bolts are screwed into the mounting screw holes of the stepped surface from the compression ring and the fixed ring, which facilitates the disassembly and cleaning of the filter screen, and facilitates the replacement of the filter screen for different coffee beans and cold extraction formulas with different precision requirements, to meet the personalized extraction requirements.

[0008] Further optimize technical scheme, one end of the filter cover body connected with the liquid outlet pipe is provided with a funnel structure, a connecting flange is arranged at the neck outlet of the funnel structure, and the liquid outlet pipe is connected with the filter cover body through the connecting flange. By arranging the funnel structure, the extraction liquid can be effectively collected after passing through the conical filter screen.

[0009] Further optimize technical scheme, a first pressure gauge is arranged on the bucket body of the funnel structure. The first pressure gauge facilitates the observation of the pressure filter screen condition in the funnel structure after the conical filter screen is filtered.

[0010] Further optimize technical scheme, the liquid outlet is equipped with a discharge pump, the outlet of the discharge pump is connected with circulation pipe and cold extraction discharge pipe in parallel, the circulation pipe is connected to the top of the cold extraction tank away from the discharge pump, the cold extraction discharge pipe is connected with double pipe filter away from the discharge pump, and the discharge port of the double pipe filter is connected with cold extraction coffee pipe.Through the circulation pipe, part of the extracted extraction liquid is returned to the cold extraction tank for re-extraction, so that the flavoring substances in the coffee powder are dissolved into the cold extraction liquid faster, the extraction uniformity is promoted, the coffee powder and the cold extraction liquid are in a flowing state through the circulation pipe, the diffusion efficiency is improved, the precipitation and stratification phenomenon are reduced, and the coffee powder is uniformly dispersed in the cold extraction process.

[0011] Further optimize technical scheme, the coffee cold extraction equipment further comprises a vacuum device, the vacuum device is communicated with the cold extraction tank, the vacuum device comprises a vacuum pump, a vacuum pipe, a material-gas separator and a feeding pipe, the material-gas separator is arranged at the top of the cold extraction tank and communicated with the inside of the cold extraction tank, one end of the vacuum pipe and the feeding pipe is communicated with the material-gas separator, the other end of the vacuum pipe is communicated with the vacuum pump, and the other end of the feeding pipe is communicated with a material barrel for storing coffee powder outside; a second pressure gauge is arranged at the top of the cold extraction tank. Proportional control valves are arranged on the circulation pipe and the cold extraction discharge pipe respectively, switch valves are arranged on the inlet pipe and the outlet pipe of the double pipe filter respectively, and stop valves are arranged on the water inlet pipe, the vacuum pipe and the feeding pipe. Coffee powder is sucked into the cold extraction tank for feeding by adopting vacuum conveying, compared with traditional gravity feeding or mechanical conveying, the method is more sanitary and has higher efficiency, and a vacuum environment can be provided in the cold extraction tank, oxidation is inhibited during extraction, and the integrity of coffee flavor is retained.

[0012] The coffee cold extraction equipment has the advantages that the conical filter device is hinged at the slag discharge port of the lower end of the cold extraction tank, compared with a traditional plane filter screen, the conical filter device can increase the contact area of coffee powder and water, avoid the accumulation of coarse coffee residue on the filter screen, reduce local blockage, improve the filtering efficiency, make water penetration more uniform, more fully extract flavoring substances in coffee, and improve the taste and aroma of coffee. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the overall schematic view of the coffee cold extraction equipment in the embodiment of the utility model.

[0014] Figure 2 is the schematic view of the bottom of the cold extraction tank in the embodiment of the utility model.

[0015] Figure 3 is the exploded view of the conical filter device in the embodiment of the utility model.

[0016] Figure 4is a schematic view of a supporting framework in the embodiment of the utility model.

[0017] Figure 5 is a schematic view of a conical filter screen in the embodiment of the utility model.

[0018] Figure 6 is a schematic view of a filter cover in the embodiment of the utility model

[0019] Reference signs: 1 cold extraction tank;101 manhole;102 glass window;103 sealing cover;104 slag discharge port;105 second pressure gauge;106 clamping part;temperature gauge 107;2 water inlet pipe;201 stop valve;3 water inlet pump;4 conical filter device;401 filter cover;4011 step surface;4012 funnel structure;4013 connecting flange;402 conical filter screen assembly;4021 supporting framework;4022 conical filter screen;4023 fixing ring;4024 supporting rib;4025 outward flange;403 compression ring;404 mounting screw hole;405 fastening bolt;406 first pressure gauge;5 liquid outlet pipe;6 discharge pump;7 circulating pipe;8 cold extraction discharge pipe;801 proportional control valve;9 double-pipe filter;901 switch valve;10 cold extraction coffee pipe;11 vacuum device;1101 vacuum pump;1102 vacuum pipe;1103 material-gas separator;1104 feeding pipe. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved in the embodiments of the utility model more clearly understood, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model.

[0021] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the connection can be for fixing or for circuit communication.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the embodiments of the utility model and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] Please see Figures 1 to 6 One embodiment of the disclosed cold brew coffee apparatus includes a cold brew tank 1. A manhole 101, a glass window 102, and a thermometer 107 are respectively provided on the top of the cold brew tank 1. The manhole 101 facilitates personnel entering the cold brew tank 1 for maintenance, cleaning, or inspection, or for pouring coffee powder to be extracted into the cold brew tank 1. A sealing cover 103 is detachably connected to the manhole 101. The sealing cover 103 is used to open or close the manhole 101 of the cold brew tank 1 to ensure the airtightness of the cold brew tank 1 and prevent external oxygen from entering the cold brew tank 1 and affecting the coffee quality. The glass window 102 facilitates personnel observation of the interior of the cold brew tank 1. In this configuration, thermometer 107 is used to detect the temperature inside the cold brew tank 1 to adjust the extraction temperature. A water inlet pipe 2 is connected to the top of the cold brew tank 1, and a water pump 3 is installed on the water inlet pipe 2. The inlet end of the water pump 3 is connected to external cold brew water. The water inlet pipe 2 extends into the cold brew tank 1 and connects to a nozzle (not shown) installed inside the cold brew tank 1. A shut-off valve 201 is installed on the water inlet pipe 2 to control the external cold brew water, which is pressurized by the water pump 3 and sprayed onto the coffee powder inside the cold brew tank 1 for soaking to extract the coffee components. A slag discharge port 104 is opened at the lower end of the cold brew tank 1, and a hinge is provided at the slag discharge port 104. A conical filter device 4 is connected to the cold brew tank 1. The conical filter device 4 is used to filter the extracted coffee extract. The conical filter device 4 includes a filter cover 401 and a conical filter assembly 402. The filter cover 401 is hinged to the outer wall of the cold brew tank 1 and corresponds to the discharge port 104. The conical filter assembly 402 is located on one end of the filter cover 401. The other end of the filter cover 401 is detachably connected to an outlet pipe 5. Specifically, a locking element 106 is provided at the edge of the discharge port 104. The filter cover 401 can drive the conical filter assembly 402 to flip at the discharge port 104 to open or close the discharge port 104. When closing the discharge port... After step 104, the filter cover 401 is locked by the locking member 106 to seal the ash discharge port 104. At this time, the conical filter assembly 402 enters the interior of the cold brew tank 1 from the ash discharge port 104. During extraction, the extract flows through the conical filter assembly 402 and enters the outlet pipe 5 for discharge. In this embodiment, by setting the conical filter assembly 402, compared with the traditional flat filter, the contact area between coffee powder and water can be increased, avoiding the accumulation of coarse coffee grounds on the filter, reducing local blockage, and allowing water to penetrate more evenly. This improves filtration efficiency and allows for more complete extraction of flavor substances in the coffee, enhancing the taste and aroma of the coffee.

[0025] In a specific example, the conical filter screen assembly 402 comprises a support framework 4021 and a conical filter screen 4022, which is detachably sleeved on the support framework 4021. The support framework 4021 provides stable support for the conical filter screen 4022, maintains the overall shape of the conical filter screen 4022, and avoids the collapse of the conical filter screen 4022, which affects the filtering effect. Moreover, the conical filter screen 4022 is detachably installed on the support framework 4021, which facilitates subsequent replacement.

[0026] In a specific example, the support framework 4021 comprises a fixed ring 4023 and support ribs 4024, the bottom ends of the support ribs 4024 are uniformly and circumferentially arranged and fixed on the fixed ring 4023, and the top ends of the support ribs 4024 are fixed together to form a conical structure. The conical filter screen 4022 is sleeved on the support ribs 4024. A concave stepped surface 4011 is arranged on the inner side wall of the filter cover 401, the outer diameter of the fixed ring 4023 corresponds to the diameter of the stepped surface 4011, so that the fixed ring 4023 can be arranged on the stepped surface 4011. An outward turning edge 4025 is arranged at the bottom edge of the conical filter screen 4022, and a compression ring 403 is detachably arranged above the outward turning edge 4025. Mounting screw holes 404 are arranged on the stepped surface 4011, the fixed ring 4023 and the compression ring 403, respectively. Fastening bolts 405 are arranged in the mounting screw holes 404. When the conical filter screen assembly 402 is assembled, the conical filter screen 4022 is first sleeved on the conical structure composed of the support ribs 4024, then the fixed ring 4023 is placed on the stepped surface 4011, and finally the compression ring 403 is pressed against the outward turning edge 4025. The fastening bolts 405 are screwed into the mounting screw holes 404 in the stepped surface 4011 from the compression ring 403 and the fixed ring 4023. This facilitates the disassembly and cleaning of the filter screen to prevent coffee residue from remaining. Moreover, it is convenient to replace the filter screen with different precision requirements for different coffee beans and cold brew formulations to meet individual extraction needs.

[0027] In a specific example, the end of the filter cover 401 connected to the liquid outlet pipe 5 is provided with a funnel structure 4012, and a connecting flange 4013 is arranged at the neck outlet of the funnel structure 4012. The liquid outlet pipe 5 is detachably connected to the filter cover 401 through the connecting flange 4013. By arranging the funnel structure 4012, the extracted liquid can be effectively collected after passing through the conical filter screen 4022 and discharged outside the cold brew tank 1 through the liquid outlet pipe 5.

[0028] In a specific example, a first pressure gauge 406 is arranged on the sidewall of the hopper body of the funnel structure 4012. The first pressure gauge 406 can detect the pressure of the filtered extraction liquid, facilitate the viewing of the internal pressure condition, and adjust the extraction progress. The first pressure gauge 406 can be any one of a mechanical pressure gauge, an electronic pressure gauge, and a digital pressure gauge, and is suitable for positive and negative pressure measurement.

[0029] In a specific example, a discharge pump 6 is arranged on the liquid outlet pipe 5. The discharge pump 6 is a centrifugal pump. A circulation pipe 7 and a cold brew discharge pipe 8 are connected in parallel at the outlet of the discharge pump 6. The circulation pipe 7 is connected to the top of the cold brew tank 1 at the end away from the discharge pump 6. The cold brew discharge pipe 8 is connected with a double-pipe filter 9 at the end away from the discharge pump 6. The discharge outlet of the double-pipe filter 9 is connected with a cold brew coffee pipe 10. The double-pipe filter 9 can be conveniently switched for use during production without stopping and replacing, thereby improving production efficiency. Specifically, a proportional control valve 801 is arranged on the circulation pipe 7 and the cold brew discharge pipe 8, respectively. Switching valves 901 are arranged on the inlet and outlet pipes of the double-pipe filter 9, respectively. Through the arrangement of the circulation pipe 7 and the cold brew discharge pipe 8, part of the extracted coffee liquid is circulated back to the cold brew tank 1 through the circulation pipe 7, re-extracted, and the flavoring substances in the coffee powder are dissolved into the cold brew liquid faster, thereby promoting the uniformity of extraction. At the same time, the circulation pipe 7 keeps the coffee powder and the cold brew liquid in a flowing state, improves the diffusion efficiency, reduces sedimentation and stratification, ensures the uniform dispersion of the coffee powder during the cold brew process, improves the extraction efficiency and product stability, improves the coffee flavor, and the other part is filtered by the double-pipe filter 9 to form a semi-finished product.

[0030] In an embodiment, the coffee cold brew device further comprises a vacuum device 11 connected to the cold brew tank 1. The vacuum device 11 comprises a vacuum pump 1101, a vacuum pipe 1102, a material-gas separator 1103, and a feeding pipe 1104. The material-gas separator 1103 is arranged at the top of the cold brew tank 1 and connected to the inside of the cold brew tank 1. One end of the vacuum pipe 1102 and the feeding pipe 1104 are both connected to the material-gas separator 1103. The other end of the vacuum pipe 1102 is connected to the vacuum pump 1101. The other end of the feeding pipe 1104 is connected to an external coffee powder storage bin. A second pressure gauge 105 is arranged at the top of the cold brew tank 1. The second pressure gauge 105 is preferably an electric contact vacuum pressure gauge, which facilitates the viewing of the vacuum degree in the cold brew tank 1. A stop valve 201 is arranged on the vacuum pipe 1102 and the feeding pipe 1104. The coffee powder to be extracted is fed by vacuum conveying. Compared with traditional gravity feeding or mechanical conveying, the method is more sanitary and efficient. At the same time, the vacuum device 11 can provide a vacuum environment for the cold brew tank 1, inhibit oxidation during extraction, and preserve the integrity of the coffee flavor.

[0031] The above is further detailed description of the utility model in combination with specific / preferred embodiments, which cannot be deemed as limiting the specific implementation of the utility model to these descriptions. For ordinary skilled in the art to which the utility model belongs, without departing from the concept of the utility model, they can make several substitutions or variations to the described embodiments, and these substitution or variation manners shall be deemed as belonging to the protection scope of the utility model. In the description of the specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the case of not mutually contradictory, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of different embodiments or examples. Although the embodiments of the utility model and its advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made in this paper without departing from the protection scope of the patent application.

Claims

1. A coffee cold brewing device, comprising a cold brewing tank, wherein a manhole, a glass window and a temperature gauge are arranged on the cold brewing tank respectively, a sealing cover is detachably connected at the manhole, a water inlet pipe is communicated with the cold brewing tank, a water inlet pump is arranged on the water inlet pipe, and a water inlet end of the water inlet pump is communicated with external cold brewing water. The lower end of the cold brewing tank is provided with a residue discharge port, and a conical filter device is hinged at the residue discharge port.

2. The coffee cold brew apparatus of claim 1, wherein: The conical filter device comprises a filter cover and a conical filter screen assembly.

3. The coffee cold brew apparatus of claim 2, wherein: The support framework comprises a fixed ring and support ribs, the bottom ends of the support ribs are uniformly and spacedly fixed on the fixed ring, the top ends of the support ribs are fixed together to form a conical structure, and the conical filter screen is covered on the support ribs.

4. The coffee cold brew apparatus of claim 3, wherein: The inner side wall of the filter cover is provided with a stepped surface, the fixed ring is arranged on the stepped surface, the bottom edge of the conical filter screen is provided with an everted edge, a compression ring is detachably arranged above the everted edge, and mounting screw holes are correspondingly arranged on the stepped surface, the fixed ring and the compression ring.

5. The coffee cold brew apparatus of claim 4, wherein: The end of the filter cover connected with the liquid outlet pipe is provided with a funnel structure, a connecting flange is arranged at the neck outlet of the funnel structure, and the liquid outlet pipe is connected with the filter cover through the connecting flange.

6. The coffee cold brew apparatus of claim 5, wherein: A first pressure gauge is arranged on the bucket body of the funnel structure.

7. The coffee cold brew apparatus of claim 6, wherein: A discharge pump is arranged on the liquid outlet pipe, a circulating pipe and a cold brewing discharge pipe are connected in parallel at the outlet of the discharge pump, one end of the circulating pipe away from the discharge pump is connected to the top of the cold brewing tank, a double-pipe filter is connected to the end of the cold brewing discharge pipe away from the discharge pump, and a cold coffee pipe is connected to the discharge outlet of the double-pipe filter.

8. The coffee cold brew apparatus of claim 7, wherein: A vacuum device is further included, which is connected with the cold brewing tank, and comprises a vacuum pump, a vacuum pipe, a material-gas separator and a feeding pipe.

9. The coffee cold brew apparatus of claim 8, wherein: A second pressure gauge is arranged on the top of the cold brewing tank.

10. The coffee cold brew apparatus of claim 9, wherein: Proportion control valves are arranged on the circulating pipe and the cold brewing discharge pipe respectively, switching valves are arranged on the inlet and outlet pipelines of the double-pipe filter respectively, and stop valves are arranged on the water inlet pipe, the vacuum pipe and the feeding pipe.

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