CN206525941U - A kind of coffee extractor with multistage pressure - Google Patents

Abstract

The utility model discloses a kind of coffee extractor with multistage pressure, it is characterised in that：Including the net cup worked in coordination and press-powder head；The net cup is internally provided with filter plate, and the filter plate will be separated into inside the net cup is located at upper and lower one-level extraction storehouse and two grades of extraction storehouses respectively, and the liquid outlets in two grades of extractions storehouse are provided with counterbalance valve；Sealing is constituted between the side wall of the press-powder head and the inwall in one-level extraction storehouse to coordinate, the press-powder head is connected with high-pressure water heating feeding assembly and vertical drive component.The utility model has the advantages that, multistage pressuring machine depth extraction is carried out to ground coffee, the active ingredient for being difficult to extract under normal pressure effect can be extracted, the taste and mouthfeel of coffee is lifted.

Description

A kind of coffee extractor with multistage pressure

Technical field

The utility model belongs to food processing field, and in particular to a kind of coffee extractor with multistage pressure.

Background technology

In the extraction process of espresso coffee, the ground coffee after grinding is extracted using hot water mostly, and in normal pressure Under, the infusion only gone out by water hot extraction is generally unable to reach the concentration requirement of espresso coffee.In addition also wrapped in ground coffee Fat containing coffee (crema), coffee fat is generally made up of vegetable oil, protein and carbohydrate；Coffee fat can greatly improve coffee Mouthfeel and taste, but coffee fat generally can not be extracted effectively by hot water at ambient pressure.

The content of the invention

The purpose of this utility model is according to there is provided a kind of coffee with multistage pressure in place of above-mentioned the deficiencies in the prior art Coffee extraction equipment, the coffee that high concentration should be extracted by way of multitple extraction with the coffee extractor of multistage pressure is molten Liquid, solves problems of the prior art.

The utility model purpose is realized and completed by following technical scheme：

A kind of coffee extractor with multistage pressure, it is characterised in that：Including the net cup worked in coordination and press-powder Head；The net cup is internally provided with filter plate, and the filter plate will be separated into inside the net cup is located at upper and lower one-level extraction respectively Storehouse and two grades of extraction storehouses, the liquid outlet in two grades of extractions storehouse are provided with counterbalance valve；The side wall of the press-powder head and described Sealing is constituted between the inwall in one-level extraction storehouse to coordinate, the press-powder head is connected with high-pressure water heating feeding assembly and vertical driving Component.

Some minor diameter through holes are offered on the filter plate.

The counterbalance valve includes barrel-type casing, and one end of the barrel-type casing connects for water inlet and with described two grades extraction storehouses Connect, the other end of the barrel-type casing is delivery port；The water inlet is provided with taper valve core and back-moving spring, the reset Spring is used to shore the taper valve core and constitute to seal with the water inlet to coordinate.

The tip of the taper valve core is towards the water inlet, and the taper valve core is shored in one end of the back-moving spring, The other end of the back-moving spring is supported on the spring fastening for being arranged at the delivery port.

The press-powder rostral wall is provided with sealing ring.

The bottom of the press-powder head, which has, is provided with porous point at the cell body that Open Side Down, the opening of the cell body bottom Water plate, described point of water plate encloses composition closed cavity jointly with the cell body；The closed cavity passes through pipeline and outside height Pressure hot water supply component is connected, and pressure release return-air valve is provided with the pipeline.

The pressure release return-air valve includes barrel-type casing, and the first end of the barrel-type casing is water inlet, the barrel-type casing The second end be pressure release gas returning port, the side of the barrel-type casing offers delivery port；The water inlet and the pressure release return-air Have in a coaxial channel, the coaxial channel to be provided with a valve element being engaged with its inwall, the valve element between mouthful and have Having driving, it points to the recovery spring that the water inlet resets, and the valve element is located on the end face of the pressure release gas returning port with close Seal rubber stopper；Between the inwall of the valve element and the coaxial channel there is water supply body to flow to the delivery port from the water inlet Gap.

The water inlet connects the high-pressure water heating feeding assembly, the delivery port and the press-powder head by the pipeline In the closed cavity be connected, the pressure release gas returning port is connected with a wastewater trough.

The press-powder head includes a counterbalance spring, and the press-powder head connects the vertical driving by the counterbalance spring Component.

The vertical drive component includes the track support and toggle vertically set；The track The number of support is two, and two track supports are symmetricly set on the both sides of the press-powder head；The both sides tool of the press-powder head There is the projection being engaged with the track support；The toggle includes crank and connecting rod, and the crank is connected with handle Hand, one end of the connecting rod is articulated with the crank, and the other end of the connecting rod is articulated with the top of the press-powder head.

The utility model has the advantages that：（1）Extrusion forming is carried out to ground coffee by press-powder head so that ground coffee formation is caused Close coffee muffin, can so increase resistance when hot water flows through ground coffee cake to slow down the flow velocity of hot water while increasing heat The time of contact of water and ground coffee, it is easy to hot water fully to extract ground coffee；（2）Multistage pressuring machine depth is carried out to ground coffee Extraction, can extract the active ingredient for being difficult to extract under normal pressure effect, lift the taste and mouthfeel of coffee.

Brief description of the drawings

Fig. 1 is in sectional view during raised configuration for press-powder head in the utility model；

Fig. 2 is sectional view when press-powder head extrudes and extracts ground coffee in the utility model；

Fig. 3 is the partial enlarged drawing at A in the utility model Fig. 1；

Fig. 4 is the structural representation of the delivery port of counterbalance valve in the utility model；

Fig. 5 is the structural representation of pressure release return-air valve in the utility model.

Embodiment

Feature of the present utility model and other correlated characteristics are made further specifically by embodiment below in conjunction with accompanying drawing It is bright, in order to the understanding of technical staff of the same trade：

Mark 1-29 is respectively in such as Fig. 1-5, figure：Net cup 1, press-powder first 2, filter plate 3, one-level extraction storehouse 4, two grades of extraction storehouses 5th, counterbalance valve 6, vertical drive component 7, sealing ring 8, track support 9, toggle 10, crank 11, connecting rod 12, handle 13rd, counterbalance spring 14, point water plate 15, closed cavity 16, barrel-type casing 17, delivery port 18, taper valve core 19, back-moving spring 20, Spring fastening 21, pressure release return-air valve 22, barrel-type casing 23, water inlet 24, pressure release gas returning port 25, delivery port 26, valve element 27, recovery Spring 28, sealing rubber plug 29.

Embodiment：As shown in figure 1, the present embodiment is specifically related to a kind of coffee extractor with multistage pressure, it is wrapped Include the net cup 1 and press-powder first 2 worked in coordination；Filter plate 3 is internally provided with net cup 1, filter plate 3 is used for during extraction coffee Carry ground coffee；Filter plate 3 will be separated into inside net cup 1 is located at upper and lower one-level extraction storehouse 4 and two grades of extraction storehouses 5 respectively；Position Counterbalance valve 6 is installed in two grades of liquid outlets for extracting the bottom of storehouse 5；Between the inwall in side wall and one-level the extraction storehouse 4 of press-powder first 2 Sealing is constituted to coordinate；Press-powder first 2 is connected with high-pressure water heating feeding assembly and vertical drive component 7.

As shown in figures 1 and 3, filter plate 3 is used to carry ground coffee to be extracted；Some minor diameters are offered on filter plate 3 to lead to Hole, the through hole is used for the liquid after extracted by filtration in extraction process, prevents ground coffee from entering two grades of extraction storehouses 5 through filter plate； In order to avoid ground coffee is fallen, the aperture of minor diameter through hole is between 0.3mm-0.5mm, the number of minor diameter through hole on filter plate 3 For 100 to 300.

As depicted in figs. 1 and 2, for the ease of the coffee powder inside the first 2 extruding one-level extraction storehouse 4 of use press-powder；Press-powder First 2 side is provided with sealing ring 8.In extruding coffee powder and extraction process（As shown in Figure 2）First 2 side of press-powder it is close The inner surface that one-level extracts storehouse 4 is close in seal 8 so that one-level extracts and forms confined space between storehouse 4 and press-powder first 2, prevents extraction The gap leakage of steam and coffee powder between press-powder first 2 and one-level extraction storehouse 4 during taking inside net cup.

As depicted in figs. 1 and 2, vertical drive component 7 is used to drive press-powder first 2 vertically moving, so as to press-powder head Extrude the coffee powder in one-level extraction storehouse 4；Vertical drive component 7 includes the track support 9 and song vertically set Handle linkage 10.Track support 9 is used in first 2 motion process of press-powder and provides guide effect.In this embodiment, track support 9 Number be two, two track supports 9 are symmetricly set on the both sides of press-powder first 2；The both sides of press-powder first 2 have and track support 9 The projection being engaged（Do not drawn in figure）；Groove of the projection along track support 9 is slided in first 2 motion process of press-powder.Crank Linkage 10 includes crank 11 and connecting rod 12, and crank 11 is connected with handle 13；The first end of crank 11 is hinged on the coffee The housing of extraction equipment, and it is fixedly connected with leader 13；Second end of crank 11 is articulated with the first end of connecting rod 12, connecting rod 12 Two ends be articulated with the top of press-powder first 2.By swing handle 13, toggle 10 can drive press-powder first 2 along track branch Frame 9 is slided.

As depicted in figs. 1 and 2, the top of press-powder first 2 is installed with a counterbalance spring 14；Press-powder first 2 is by compensating bullet Spring 14 is connected to vertical drive component 7.By counterbalance spring 14, press-powder first 2 is adapted to the one-level extraction inside different-thickness of storehouse 4 Coffee powder, provide enough compensation pressure for the coffee powder of different-thickness；In the first 2 extruding one-level extraction storehouse 4 of press-powder During the coffee powder in portion（As shown in Figure 2）, after point water plate 15 contact coffee powder of first 2 bottom of press-powder, counterbalance spring 14 start to shrink at；Swing handle 13 is continued thereafter with so that the continuation contraction of counterbalance spring 14, provides coffee powder enough pressure It is allowed to form coffee muffin.It should be noted that when press-powder first 2 is pressed onto bottom, crank 11 is linear with connecting rod 12, by activity Quadrangle become stable triangular structure so that it is motionless that first 2 locking of press-powder is fixed on the position, so as to keep out extraction process High pressure produced by middle one-level extraction storehouse 4 and two grades of extraction storehouses 5.

Press-powder first 2 is additionally operable into one-level extraction storehouse 4 in addition to for compressing the ground coffee inside one-level extraction storehouse 4 The ground coffee in portion provides high-pressure water heating to extract coffee；The bottom of press-powder first 2 has the cell body that Open Side Down, cell body bottom Porous point water plate 15 is installed at opening；In the present embodiment, divide water plate 15 to be bolted and be attached to press-powder first 2；Point Water plate 15 encloses composition closed cavity 16 jointly with cell body；Closed cavity 16 passes through pipeline and outside high-pressure water heating feeding assembly It is connected, high-pressure water heating feeding assembly carries out being pumped by for hot water by high-pressure pump.Can profit after the completion of coffee powder extruding Hot water is filled to coffee muffin high pressure with press-powder first 2, to extract coffee muffin.The high-pressure water heating that outside is provided is defeated by pipeline Inside the closed cavity 16 for delivering to first 2 bottom of press-powder, hot water uniformly flows to coffee after the porous point water conservancy diversion of water plate 15 Muffin.

As shown in figure 5, pressure release return-air valve 22 includes barrel-type casing 23, the first end of barrel-type casing 23 is water inlet 24, cylinder Second end of shape housing 14 is pressure release gas returning port 25, and the side of barrel-type casing 23 offers delivery port 26；Water inlet 24 passes through pipe Road connects high-pressure water heating feeding assembly, and delivery port 26 is connected with the closed cavity 16 on press-powder first 2, and pressure release gas returning port 25 connects useless Tank.Have between water inlet 24 and pressure release gas returning port 25 in a coaxial channel, coaxial channel and be provided with one and the matching of its inwall The valve element 27 of conjunction.Have on valve element 27 and drive it to point to the recovery spring 28 that water inlet 24 resets, valve element 27 is towards pressure release return-air There is sealing rubber plug 29 on the end face of mouth 25；Between valve element 27 and the inwall of coaxial channel there is water supply body to be flowed from water inlet 24 To the gap of delivery port 26.

As shown in Figures 1 to 4, counterbalance valve 6 is used to open when two grades of pressure extracted in storehouse 5 are more than predetermined value；Back pressure Valve 6 includes barrel-type casing 17, and one end of barrel-type casing 17 is water inlet, and water inlet is connected 5, barrel-type casing 17 with two grades of extraction storehouses The other end be delivery port 18；Water inlet is provided with taper valve core 19 and back-moving spring 20, and back-moving spring 20 is used to shore cone Shape valve element 19 constitutes sealing with water inlet and coordinated.The tip of taper valve core 19 is towards water inlet, and one end of back-moving spring 20 is shored Taper valve core 19, the other end of back-moving spring 20 is supported on the spring fastening 21 for being arranged at delivery port 18；Spring fastening 21 is company It is connected on the hollowed-out board of delivery port 18；As shown in figure 4, in the present embodiment, spring fastening 21 is cross hollowed-out board；Barrel-type casing Liquid in 17 discharges the outside of barrel-type casing 17 from the hollow part of spring fastening 21.

As shown in figures 1 and 3, when the pressure in two grades of extraction storehouses 5 is less than preset value, taper valve core 19 is in back-moving spring 20 Shoring under insertion counterbalance valve 6 water inlet and water inlet is blocked, now counterbalance valve 6 is closed, two grades extraction storehouses 5 Interior liquid can not flow out from counterbalance valve 6；When two grades, which extract the inside of storehouse 5, is more than preset value, in two grades of liquid extracted in storehouse 5 Or under the promotion of gas, taper valve core 19 is moved to the direction of delivery port 18, and back-moving spring 20 gradually reduces, counterbalance valve 6, which enters, to be beaten Open state；Liquid or gas during in open mode in two grades of extraction storehouses 5 are via the barrel-type casing 17 of counterbalance valve 6 from counterbalance valve 6 delivery port outflow；Open counterbalance valve 6 pressure determined by back-moving spring 20, can by the spring for the dual extension-compression modulus that changes the outfit To adjust the pressure for opening counterbalance valve 6.

As shown in Figure 1 to Figure 3, ground coffee is extracted using the coffee extractor with multistage pressure of the present embodiment Take and comprise the following steps：

1）Load ground coffee；The press-powder first 2 being plugged in one-level extraction storehouse 4 is extracted upwards using vertical drive component 7； Then ground coffee is poured into inside one-level extraction storehouse 4, the coffee powder heap of filling piles up the upper surface of filter plate 3；In order to ensure extraction Quality, the weight of filling ground coffee is between 8g-10g every time.

2）Ground coffee extrusion forming；Moved downward using vertical drive component 7 driving press-powder first 2, and insert one-level extraction Inside storehouse 4, the ground coffee extracted positioned at point water plate 15 of first 2 lower surface of press-powder to one-level inside storehouse 4 is extruded, and is allowed to be formed Fine and close coffee muffin；In extrusion process, first after point contact coffee powder of water plate 15 of first 2 bottom of press-powder, bullet is compensated Spring 14 is started to shrink at；Swing handle 13 is continued thereafter with so that the continuation contraction of counterbalance spring 14, provides coffee powder enough pressures Power is allowed to form coffee muffin；The setting of counterbalance spring 14 allows press-powder first 2 to provide foot for the ground coffee of different volumes Enough pressure.By extrusion forming, ground coffee forms the coffee muffin of densification, when so can increase hot water and flowing through ground coffee cake Resistance to slow down the flow velocity of hot water while increasing the time of contact of hot water and ground coffee, be easy to hot water to fill ground coffee Divide extraction.

3）Ground coffee is infiltrated；Press-powder first 2 keeps locking squeezed state, using high-pressure water heating feeding assembly through pressure release Return-air valve 22 supplies high-pressure water heating to press-powder first 2；The closed cavity 16 that high-pressure water heating is flowed into inside press-powder first 2, subsequent hot high pressure A porous point water plate 15 for water through the lower surface of closed cavity 16 uniformly spreads to coffee muffin；Become after ground coffee infiltration expansion Finer and close, hot water flows through the resistance that ground coffee cake is subject to and further increased；

It should be noted that when high-pressure water heating flows through pressure release return-air valve 22, valve element 27 is made in the hydraulic pressure from water inlet 24 Moved with the lower direction to pressure release gas returning port 25；Recover spring 28 simultaneously and be in compressive state, sealing rubber plug 29 returns pressure release Gas port is completely plugged, space of the hot water from water inlet 24 between valve element 27 and the inwall of coaxial channel flow to delivery port 26 from And enter press-powder first 2.

4）One-level extraction is carried out to ground coffee；In one-level extraction process, high-pressure water heating feeding assembly continues to supply to press-powder first 2 Answer high-pressure water heating；With the supply of hot water, the pressure inside one-level extraction storehouse 4 constantly increases；When one-level extracts the pressure in storehouse 4 When power is more than one-level extraction threshold value, high-pressure water heating hot water in the presence of high pressure flows through the coffee muffin and filter plate 3 of infiltration, enters Enter inside two grades of extraction storehouses 5.The main minor diameter through hole on the resistance and filter plate 3 of coffee muffin of one-level extraction threshold value is due to micro- The resistance that the effect of holes is caused is together decided on；During single extraction, high-pressure water heating is slowly flowed across in the presence of various resistances Coffee muffin so that ground coffee can fully be contacted with high-pressure water heating, so that ground coffee is fully extracted.

In one-level extraction process, the counterbalance valve 6 of two grades of extraction bottoms of storehouse 5 is not yet opened, now comprising extraction component High-pressure water heating enters inside two grades of extraction storehouses 5, and the pressure inside two grades of extraction storehouses 5 constantly increases, and is extracted when two grades inside storehouse 5 When pressure is more than two grades of extraction threshold values, counterbalance valve 6 enters open mode, and two grades of extractions, two grades of extraction threshold values are carried out to ground coffee The resilience dynamics of back-moving spring 20 inside counterbalance valve 6 is determined.

5）Two grades of extractions are carried out to ground coffee；In two grades of extractions as the hot water comprising extraction component is flowed by counterbalance valve 6 Go out two grades of extraction storehouses 5；Because the hot water comprising extraction component needs to have enough pressure to open in two grades of extraction processes Ground coffee muffin bears bigger hydraulic pressure in counterbalance valve 6, therefore two grades of extraction processes.Coffee muffin is born in two grades of extraction processes Hydraulic pressure up to 12bar-15bar, can realize that depth is extracted to coffee muffin in the presence of huge hydraulic pressure, in coffee muffin Grease（crema）And other the relatively low active principle of solubility can be molten under huge hydraulic pressure effect under lower pressure Solution enters two grades of extraction storehouses 5 in high-pressure water heating.After the completion of extraction, the infusion comprising extraction component flows from counterbalance valve 6 Go out, into inside collection vessel.

6）After extraction to be done, the water pump in high-pressure water heating feeding assembly stops pump water, because water pump has check configuration Property, thus one-level extraction storehouse 4 and two grades extraction storehouses 5 in pressure will not be released by high-pressure water heating component；Work as hot high pressure Water feeding assembly stops after pump water, hydraulic pressure event resolves, recovers spring 28 and promotes valve element 27 to the direction of water inlet, now pressure release Return-air valve 22 is operated in reset state；During in reset state, what is had in one-level extraction storehouse 4 and two grades of extraction storehouses 5 exceedes The remaining steam of 10bar pressure by the space point between water plate 15, delivery port 26, valve element 27 and the inwall of coaxial channel and Pressure release gas returning port 25 is discharged in wastewater trough, so that the purpose of pressure release is reached, wherein, a point water plate 15 can stop ground coffee to water outlet The flowing in 26 directions of mouth.

In the extraction of above-mentioned one-level and two grades of extraction processes, the temperature of high-pressure water heating is between 95 DEG C -98 °, extraction time For 15s-25s, whole extraction process mesohigh hot water supply component supply water is 30ml-45ml, is flowed out from counterbalance valve The volume of infusion is up to 25ml-35ml；In the present embodiment, by adjusting the water supply flow of water supply component so as to adjust coffee The hydraulic pressure that coffee muffin is born, in the present embodiment, the water supply flow of water supply component are stable in 1.0g/s-2.0g/s.

The advantageous effects of the present embodiment are：（1）Extrusion forming is carried out to ground coffee by press-powder first 2 so that coffee Powder forms the coffee muffin of densification, can so increase resistance when hot water flows through ground coffee cake so that the flow velocity for slowing down hot water is same The time of contact of Shi Zengjia hot water and ground coffee, it is easy to hot water fully to extract ground coffee；（2）Ground coffee is carried out multistage Depth of pressurizeing extraction, can extract the active ingredient for being difficult to extract under normal pressure effect, lift the taste and mouthfeel of coffee.

Claims (10)

1. a kind of coffee extractor with multistage pressure, it is characterised in that：Including the net cup worked in coordination and press-powder head； The net cup is internally provided with filter plate, and the filter plate will be separated into inside the net cup is located at upper and lower one-level extraction storehouse respectively And two grades extraction storehouses, it is described two grades extraction storehouse liquid outlets counterbalance valve is installed；The side wall of the press-powder head and described one Sealing is constituted between the inwall in level extraction storehouse to coordinate, the press-powder head is connected with high-pressure water heating feeding assembly and vertical driving group Part.

2. a kind of coffee extractor with multistage pressure according to claim 1, it is characterised in that：On the filter plate Offer some minor diameter through holes.

3. a kind of coffee extractor with multistage pressure according to claim 1, it is characterised in that：The counterbalance valve Including barrel-type casing, one end of the barrel-type casing is connected for water inlet and with described two grades extraction storehouses, the barrel-type casing The other end is delivery port；The water inlet is provided with taper valve core and back-moving spring, and the back-moving spring is described for shoring Taper valve core constitutes sealing with the water inlet and coordinated.

4. a kind of coffee extractor with multistage pressure according to claim 3, it is characterised in that：The cone valve The tip of core is towards the water inlet, and the taper valve core is shored in one end of the back-moving spring, the back-moving spring it is another End is supported on the spring fastening for being arranged at the delivery port.

5. a kind of coffee extractor with multistage pressure according to claim 1, it is characterised in that：Around the pressure Prostitute side wall is provided with sealing ring.

6. a kind of coffee extractor with multistage pressure according to claim 1, it is characterised in that：The press-powder head Bottom have porous point water plate be installed at the cell body that Open Side Down, the opening of the cell body bottom, described point of water plate with The cell body encloses composition closed cavity jointly；The closed cavity is connected by pipeline with outside high-pressure water heating feeding assembly It is logical, pressure release return-air valve is provided with the pipeline.

7. a kind of coffee extractor with multistage pressure according to claim 6, it is characterised in that：The pressure release is returned Air valve includes barrel-type casing, and the first end of the barrel-type casing is water inlet, and the second end of the barrel-type casing is pressure release return-air Mouthful, the side of the barrel-type casing offers delivery port；It is coaxial logical with one between the water inlet and the pressure release gas returning port It is provided with a valve element being engaged with its inwall, the valve element to have in road, the coaxial channel and drives to enter described in its sensing The recovery spring that the mouth of a river resets, the valve element, which is located on the end face of the pressure release gas returning port, has sealing rubber plug；The valve element There is water supply body the gap of the delivery port is flowed to from the water inlet between the inwall of the coaxial channel.

8. a kind of coffee extractor with multistage pressure according to claim 7, it is characterised in that：The water inlet The high-pressure water heating feeding assembly, the delivery port and the closing chamber body phase in the press-powder head are connected by the pipeline Connection, the pressure release gas returning port is connected with a wastewater trough.

9. a kind of coffee extractor with multistage pressure according to claim 1, it is characterised in that：The press-powder head Including a counterbalance spring, the press-powder head connects the vertical drive component by the counterbalance spring.

10. a kind of coffee extractor with multistage pressure according to claim 1, it is characterised in that：It is described vertical Drive component includes the track support and toggle vertically set；The number of the track support is two, Two track supports are symmetricly set on the both sides of the press-powder head；The both sides of the press-powder head have and the track support The projection being engaged；The toggle includes crank and connecting rod, and the crank is connected with handle, one end of the connecting rod The crank is articulated with, the other end of the connecting rod is articulated with the top of the press-powder head.