CN209421716U - A kind of coffee machine - Google Patents

Abstract

The utility model provides a kind of coffee machine, coffee machine includes: female boiler, sub- boiler and the water supply device for supplying cold water, sub- boiler is arranged in female boiler, the water inlet of the water inlet of female boiler and sub- boiler is connected to water supply device respectively, female boiler is equipped with the first heater for heating the water in female boiler, coffee machine further includes the brewing device with water outlet, brewing device is connected to water supply device and sub- boiler respectively, so that the hot water in sub- boiler is mixed with the cold water in water supply device.The technical solution of the utility model overcomes the problems, such as that water temperature over-high causes mouthfeel bad when existing coffee maker makes coffee.

Description

A kind of coffee machine

Technical field

The utility model relates to coffee machine technical fields, and in particular to a kind of coffee machine.

Background technique

Coffee is liked by its unique taste by the majority of consumers, makes coffee not only convenient but also energy using coffee machine Guarantee the quality of coffee, therefore coffee machine is widely used, coffee machine generally have there are two types of function, one is extracted with hot water Coffee, another kind are to dismiss milk foam using steam.Coffee machine in the prior art has following several:

The first is the coffee machine with single boiler, and the temperature of water is lower than 100 DEG C when extracting coffee, if however wanting to generate Steam must heat the water to 100 DEG C, therefore single boiler coffee machine presence cannot combine and provide hot water and provide steam Defect.

Second is the coffee machine with double boiler, and double boiler coffee machine can use a boiler and provide hot water, another A boiler generates steam, although double boiler coffee machine, which can combine, provides the function of hot water and offer steam, price It is more expensive much than single boiler coffee machine.

The third is the coffee machine with primary-secondary boiler, and primary-secondary boiler cost is cheaply many relative to double boiler, female boiler There is provided steam and non-extraction hot water, sub- boiler is by generating heat exchange with female boiler to be heated by female boiler, then sub- pot Hot water in furnace, which is sent to, to be continued to heat in constant temperature system, and the water after heating can directly infuse coffee.Constant temperature system includes punching The bottom for brewing boiler is arranged in bubble boiler, heating device and temperature control device, heating device.Cold water is after the preheating of female boiler Continuing to heat even without heating device, temperature also can be more than 100 DEG C, which has been more than the optimum temperature of coffee extracted, And then cause the coffee mouthfeel come out using the brewed in hot water of the temperature bad.

Utility model content

The main purpose of the utility model is to provide a kind of coffee machines, to solve the water temperature infused coffee in the prior art The excessively high problem for causing mouthfeel bad.

To achieve the above object, the utility model provides a kind of coffee machine, comprising: female boiler, sub- boiler and supply are cold The water supply device of water, sub- boiler are arranged in female boiler, and the water inlet of the water inlet of female boiler and sub- boiler is filled with water supply respectively Connection is set, female boiler is equipped with the first heater for heating the water in female boiler, and coffee machine further includes with water outlet Brewing device, brewing device is connected to water supply device and sub- boiler respectively, so that in the hot water and water supply device in sub- boiler Cold water mixed.

Further, coffee machine further include the cold water in the hot water and water supply device in sub- boiler is carried out it is uniformly mixed Mixing arrangement.

Further, brewing device include it is spaced brew boiler and tea infuser, brew boiler and sub- boiler, water supply Device connection, the water container for brewing boiler and tea infuser are connected by the first water stream channel setting up and down and the second water stream channel It is logical, it brews boiler, the second water stream channel, water container and the first water stream channel and forms circulation loop, tea infuser is equipped with second Heating device, the inner roof wall for brewing boiler are higher than inner roof wall, secondary heating mechanism and circulation loop the composition mixing of water container The bottom of water container is arranged in device, water outlet.

Further, tea infuser includes pedestal and water container, and water container is set on the base, and water outlet connects downwards It is connected to outlet conduit, one end of the separate water outlet of outlet conduit forms brewing mouth, and outlet conduit is equipped with switch valve.

Further, switch valve is two position three-way valve, and outlet conduit is divided into the confession being connected to water outlet by two position three-way valve Waterpipe and brewing pipeline, the first interface of two position three-way valve are connect with water supply line, the second interface and punching of two position three-way valve Pipeline connection is boiled, two position three-way valve has the first operating position that first interface is connected to second interface and connects its third The second operating position that mouth is connected to second interface, the position of brewing mouth are higher than the position of second interface, and two position three-way valve is in When the second operating position, the water in brewing pipeline passes sequentially through second interface and the discharge of third interface.

Further, the temperature that tea infuser is equipped with for detecting water outlet or the temperature close to the hot water of water outlet passes Sensor.

Further, water pump is equipped between brewing device and water supply device.

Further, coffee machine further includes the pressure regulating solenoid valve being arranged in parallel with water pump.

Further, pressure regulating solenoid valve is decompression solenoid valve.

Further, flow control valve is equipped between water pump and brewing device.

Technical solutions of the utility model have the advantages that in actual use the water in water supply device enters In female boiler, female boiler is heated by first heater, to make the sub- boiler being arranged in female boiler be heated, from sub- boiler It the hot water of middle outflow and is mixed in brewing device from the cold water flowed out in water supply device.It can be with by setting brewing device By hot water and cold water mix to the arbitrary temp infused coffee is suitble to, to avoid the water temperature over-high infused coffee, and then cause The bad problem of mouthfeel.

Detailed description of the invention

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, it is also possible to obtain other drawings based on these drawings.In the accompanying drawings:

Fig. 1 shows the schematic diagram of internal structure of coffee machine according to the present utility model；

Fig. 2 is pressure changing when infusing coffee using coffee machine in the prior art；

Fig. 3 is pressure changing when infusing coffee using the coffee machine in the application；

Fig. 4 shows the flow diagram of the method for infusing coffee according to the coffee machine in the application.

Wherein, the appended drawing reference in above-mentioned attached drawing are as follows:

10, female boiler；11, steam brewing head；12, hot water head；13, pressure switch；14, water level probe；15, air gauge； 16, exhaust valve；17, safety valve；20, sub- boiler；30, first heater；41, boiler is brewed；411, water pressure gauge；421, it is filled with water Container；4211, water outlet；422, pedestal；4221, brewing mouth；4231, first interface；4232, second interface；4233, third Interface；424, water supply line；425, brewing pipeline；43, the first water stream channel；44, the second water stream channel；45, the second heating dress It sets；51, the first pipeline section；52, the second pipeline section；521, first check-valve；522, flow control valve；53, third pipeline section；54, the 4th Pipeline section；541, water pump；542, inlet water solenoid valve；55, the 5th pipeline section；552, second check-valve；60, relief valve.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical Novel protected range.

A kind of specific embodiment of a kind of coffee machine as shown in Figure 1, comprising: female boiler 10, sub- boiler 20 and supply The water supply device of cold water, sub- boiler 20 are arranged in female boiler 10, the water inlet of female boiler 10 and the water inlet point of sub- boiler 20 It is not connected to water supply device, female boiler 10 is equipped with the first heater 30 for heating the water in female boiler 10, coffee machine It further include the brewing device with water outlet 4211, brewing device is connected to water supply device and sub- boiler 20 respectively, so that sub- pot Hot water in furnace 20 is mixed with the cold water in water supply device.

In actual use, the water in water supply device enters in female boiler 10, and female boiler 10 is filled by the first heating 30 heating are set, so that the sub- boiler 20 being arranged in female boiler 10 be made to be heated, the hot water that is flowed out from sub- boiler 20 and from confession The cold water flowed out in water installations is mixed in brewing device.It can be by hot water and cold water mix extremely by setting brewing device It is suitble to the arbitrary temp infused coffee, thus the problem for avoiding the water temperature over-high infused coffee, and then causing mouthfeel bad.

Specifically, coffee machine further include the cold water in the hot water and water supply device in sub- boiler 20 is carried out it is uniformly mixed Mixing arrangement.Hot water or cold water can be uniformly mixed by mixing arrangement, and the coffee mouthfeel for brewing out is more preferable.

Specifically, coffee machine further includes PID temperature controller, and PID temperature controller is electric with secondary heating mechanism, temperature sensor respectively Connection, and control secondary heating mechanism work.

Specifically, brewing device include it is spaced brew boiler 41 and tea infuser, brew boiler 41 and sub- boiler 20, water supply device is connected to, and the water container 421 for brewing boiler 41 and tea infuser passes through 43 He of the first water stream channel setting up and down The connection of second water stream channel 44 brews boiler 41, the second water stream channel 44, water container 421 and the formation of the first water stream channel 43 Circulation loop, tea infuser are equipped with secondary heating mechanism 45, and the inner roof wall for brewing boiler 41 is higher than the interior top of water container 421 Wall, secondary heating mechanism 45 and circulation loop constitute mixing arrangement, and the bottom of water container 421 is arranged in water outlet 4211.The Two heating devices 45 work, so that the water temperature around secondary heating mechanism 45 is got higher, because of the density of the density ratio cold water of hot water It is small, therefore hot water moves upwards, and brews boiler 41 by the first water stream channel 43 flow direction, brews the cold water of lower portion thereof at this time Water container is flowed by the second water stream channel 44, and the inner roof wall due to brewing boiler 41 is higher than in water container 421 Roof, according to the pressure formula of liquid it is found that under isodensity, the height of liquid is higher, bigger to the pressure of bottom surface, therefore The pressure that water in boiler 41 is brewed at first water stream channel 43 and at the second water stream channel 44 is greater than the pressure of water in water container 421 Power, therefore brew the water in boiler 41 and also can flow to water container 421 by the first water stream channel 43 and the second water stream channel 44, But hot water cannot be still mixed thoroughly with cold water at this time, then detect actual water temperature by temperature sensor, and utilize PID Temperature controller controls secondary heating mechanism work, so that actual temperature is consistent with set temperature, can accurately control through the above way Actual water temperature processed.

Specifically, boiler is brewed equipped with water pressure gauge 411, and water pressure gauge can measure the hydraulic pressure brewed in boiler, and pass through With the cooperating of relief valve 60, guarantee brews the hydraulic pressure in boiler in a certain range.

Specifically, tea infuser includes pedestal 422 and water container 421, and water container 421 is arranged on pedestal 422, water outlet Outlet conduit is connected at mouth 4211 downwards, one end of the separate water outlet 4211 of outlet conduit forms brewing mouth 4221, water outlet Pipeline is equipped with switch valve.The water flowed out from brewing mouth 4221 can infuse coffee, and switch valve can control beating for outlet conduit On or off is closed.

Specifically, switch valve is two position three-way valve, and outlet conduit is divided by two position three-way valve to be connected to water outlet 4211 The first interface 4231 of water supply line 424 and brewing pipeline 425, two position three-way valve is connect with water supply line 424, two position three-way valve Second interface 4232 be connected to brewing pipeline 425, two position three-way valve have first interface 4231 and second interface 4232 are connected The first logical operating position and the second operating position for being connected to its third interface 4233 with second interface 4232, brewing mouth 4221 position is higher than the position of second interface 4232, when two position three-way valve is in the second operating position, in brewing pipeline 425 Water passes sequentially through second interface 4232 and third interface 4233 is discharged.When two position three-way valve is in the first operating position, be filled with water appearance Water in device 421 flows to brewing pipeline 425 from water supply line 424, and finally outflow carries out brewing coffee from brewing mouth 4221；Two When position three-way valve is in the second operating position, the water in water container 421 is flowed to from brewing pipeline 425 by second interface 4232 Third interface 4233 avoids being in the first work two position three-way valve next time so that discharge remains in the waste water in brewing pipeline 425 The cold water remained in brewing pipeline 425 when position influences the water temperature infused coffee with water.

Specifically, the temperature that tea infuser is equipped with for detecting water outlet 4211 or the water temperature at water outlet 4211 passes Sensor.Temperature sensor, which is arranged in, is more conducive to accurately measuring the water flowed out from water outlet 4211 near water outlet 4211 Actual temperature.

Specifically, water pump 541 is equipped between brewing device and water supply device.Water pump 541 can make the pressure rise of water, side Just it is female boiler water supply, also facilitates and ground coffee is extracted in the first predetermined pressure.

Specifically, coffee machine further includes the pressure regulating solenoid valve being arranged in parallel with water pump 541.The adjustable water of pressure regulating solenoid valve Pressure.

Specifically, pressure regulating solenoid valve is decompression solenoid valve.When open decompression solenoid valve and switch off the pump 541 when, decompression electricity Magnet valve makes the pressure reduction of water, so that the pressure reduction of the water in brewing device, therefore finally flowed from brewing mouth 4221 The pressure reduction of water out.

Specifically, flow control valve 522 is equipped between water pump 541 and brewing device.Flow control valve 522 is conducive to adjust The flow of water-saving flow, the water flowed into brewing device by control can change water temperature.

Specifically, also there is steam brewing head 11, the hot water for cleaning cup that can dismiss milk foam on female boiler 10 First 12, the pressure switch 13 of the work of first heater 30, the water level probe 14 of measurement water level are controlled, for measuring female boiler 10 The air gauge 15 of interior air pressure, the exhaust valve 16 that gas can be discharged and ensure the safety valve of pressure in safe range in female boiler 10 17。

Specifically, coffee machine further include: the first pipeline section 51, the second pipeline section 52 and third pipeline section 53, the one of the first pipeline section 51 End is connected with sub- boiler 20, and one end of the second pipeline section 52 is connected to water supply device, the first pipeline section 51 and the second pipeline section 52 it is another One end is connected to third pipeline section 53, and the other end of third pipeline section 53 is connected to brewing device, the heat flowed out from sub- boiler 20 Water and the cold water flowed out from water supply device flow through third pipeline section 53, so that hot water and cold water be facilitated to mix in brewing device It is even.

Specifically, it is connected on the 4th pipeline section 54 between water supply device and female boiler 10 and is equipped with water pump along water (flow) direction 541 and inlet water solenoid valve 542, the second pipeline section 52 be connected on the 4th pipeline section 54 between water pump 541 and inlet water solenoid valve 542, It is equipped with first check-valve 521 and flow control valve 522 along water (flow) direction on second pipeline section 52, first check-valve 521 prevents water from falling Stream, flow control valve 522 control the uninterrupted of water.

Specifically, pressure release pipeline section is connected on third pipeline section 53, pressure release pipeline section is equipped with relief valve 60.Opening relief valve can With draining, so that brewing the pressure reduction of boiler.

Specifically, the 5th pipeline section 55, the 5th pipe are connected on the second pipeline section 52 of the upstream of first check-valve 521 Section 55 is connected to sub- boiler 20, and the 5th pipeline section 55 is equipped with second check-valve 552, and second check-valve 552 prevents aqueous reflux, is supplied water Cold water in device successively passes through the 4th pipeline section 54, the second pipeline section 52 flows into sub- boiler 20 from the 5th pipeline section 55.

The working method of coffee machine in actual application is described in detail below with reference to Fig. 1:

After coffee machine is powered, water level probe 14 controls water pump 541 and works, and inlet water solenoid valve 542 is opened, and water pump 541 starts Work, water supply device supply water to female boiler 10 and sub- boiler 20, female water inlet of boiler 10 to water pump 541 after ordinary water level and water inlet electricity Magnet valve 542 is closed, and when water level probe 14 is detected lower than ordinary water level, water pump 541 and inlet water solenoid valve 542 work, thus It is maintained at the water level in female boiler 10 in the range of ordinary water level；Pressure switch 13 controls first heater 30 and works, the One heating device 30 is by heating the water in female boiler 10, so that temperature rises in female boiler 10, when temperature reaches certain temperature Afterwards, exhaust valve 16 is opened and exhaust gas is discharged, and first heater after reaching certain value because of pressure is avoided just to stop the case where heating It generates, works on rear heating tube, exhaust valve 16 is closed, and pot furnace pressure constantly rises, when steam pressure reaches in female boiler When being about 120 DEG C to 1.1bar both temperature, pressure switch 13 controls first heater and stops heating, when steam in female boiler When pressure is lower than 1.1bar, first heater works on, and temperature is with the temperature raising in female boiler 10 in sub- boiler 20 And increase, the water in sub- boiler 20 flows in brewing device, so that the temperature brewed in boiler 41 increases, and then brews boiler Pressure rise in 41, when brewing the pressure in boiler 41 and being more than 9bar, the opening of relief valve 60 carries out draining pressure release, so that punching Pressure remains at 9bar in bubble boiler 41.

The course of work infused coffee is as follows:

Different temperature is set according to different ground coffees by temperature control panel；

The wet stage: water pump 541 does not work, and two position three-way valve is in the first operating position, the water in water container 421 from Outflow moistens coffee in brewing mouth 4221, and pressure is reduced to 3bar wherein from 9bar, moistens the time in stage according to need It wants arbitrarily to adjust；

The high pressure extraction stage: water pump 541 and flow control valve 522 are started to work, the cold water and sub- boiler in water supply device Hot water in 20 mixes in brewing device, and secondary heating mechanism 45 works, so that the water temperature around secondary heating mechanism 45 becomes Height, because the density of the density ratio cold water of hot water is small, hot water is moved upwards, and is brewed by the first water stream channel 43 flow direction Boiler 41, the cold water for brewing lower portion thereof at this time flow into water container by the second water stream channel 44, and due to brewing boiler 41 inner roof wall is higher than the inner roof wall of water container 421, according to the pressure formula of liquid it is found that under isodensity, the height of liquid Degree is higher, bigger to the pressure of bottom surface, therefore brews in boiler 41 at the first water stream channel 43 and at the second water stream channel 44 The pressure of water is greater than the pressure of water in water container 421, therefore brewing the water in boiler 41 also can be by the first water stream channel 43 Water container 421 is flowed to the second water stream channel 44, but hot water cannot be still mixed thoroughly with cold water at this time, then be passed through Temperature sensor detects actual water temperature, and is worked using PID temperature controller control secondary heating mechanism, so that actual temperature and setting Temperature is consistent, can accurately control actual water temperature through the above way.Water pump 541 can make the pressure of water reach 9bar when working, Flow control valve 522 can be such that hydraulic pressure slightly rises, and final water is flowed out with the pressure of 9~10bar to coffee from brewing mouth 4221 Powder is extracted, wherein the time in high pressure extraction stage can arbitrarily be adjusted；

The low pressure extractive stage: decompression solenoid valve is started to work, and brewing pressure is made to be reduced to 5~7bar from 9~10bar, complete At last low pressure extractive, then, two position three-way valve is in the second operating position, and the water in water container passes through from brewing pipeline Second interface flows to third interface, so that discharge remains in waste water in brewing pipeline, avoids being in two position three-way valve next time the The cold water remained in brewing pipeline when one operating position influences the water temperature infused coffee with water.It is set by control decompression solenoid valve The pressure in fixed different low pressure extractive stage, can set the pressure in different low pressure extractive stages according to the self-characteristic of ground coffee Power, can be to avoid the hypertonia when latter end extracts so as to low pressure extractive, and then leads to the coffee liquid mouthfeel extracted It is partially bitter, wherein the time in low pressure extractive stage can arbitrarily be adjusted.

As shown in figure 4, the method to be made coffee using this coffee maker is described in detail below:

Specifically includes the following steps:

Ground coffee is moistened using the hot water in brewing device；

The hot water in brewing device extracts a part in ground coffee under the first predetermined pressure；

Rest part of the hot water in brewing device to ground coffee is extracted under the second predetermined pressure, wherein the Two predetermined pressures are less than the first predetermined pressure.The first predetermined pressure is arranged sufficiently to extract the grease in ground coffee, Latter end extraction is carried out under two predetermined pressures, is conducive to avoid excessive extraction that coffee mouthfeel is caused to become bitter phenomenon generation.

Specifically, the first predetermined pressure is in the range of 9~10bar.The hydraulic pressure brewed in boiler remains at 9bar, Hydraulic pressure is fluctuated slightly by the control of flow control valve, and finally in the range of 9~10bar, ground coffee is extracted using high pressure It takes and is conducive to sufficiently extract the grease in ground coffee.

Specifically, the time extracted to a part in ground coffee is within the scope of 14~18s.It can by high pressure extraction Sufficiently to extract the grease in ground coffee, keep the mouthfeel of coffee more mellow.

Specifically, during extracting to the rest part in ground coffee, the hydraulic pressure in brewing device is pre- from first Constant-pressure is down to after the second predetermined pressure and is maintained under the second predetermined pressure, and the second predetermined pressure is 5~6bar.Latter end is adopted With low pressure extractive, excessive extraction is avoided to cause coffee mouthfeel partially bitter.

Specifically, the time extracted to the rest part of ground coffee is in the range of 0~6s.The low pressure extractive stage Time is less than the time in high pressure extraction stage, and excessive extraction is avoided to cause coffee mouthfeel partially bitter.

Specifically, during moistening to ground coffee, the hydraulic pressure in brewing device is down to from the first predetermined pressure It after third predetermined pressure and is maintained under third predetermined pressure, third predetermined pressure is in the range of 2~4bar, to coffee During a part in powder is extracted, the hydraulic pressure in brewing device rises to after predetermined pressure from third predetermined pressure And it is maintained under first predetermined pressure.Bored steamed journey when wet process is made coffee similar to hand, can during bored steaming It is contacted so that grease in ground coffee is mild with water, makes grease be more easier to separate with ground coffee, at the same time ground coffee In carbon dioxide suitable can be discharged, grease is finer and smoother.

Specifically, the wet time is in the range of 3~8s.Wet process keeps the mouthfeel of coffee more mellow.

Specifically, wet time, time that a part in ground coffee is extracted and to its remaining part of ground coffee The sum of time extracted is divided to be no more than 30s.Brewing time can be determined according to different ground coffees.

Specifically, during wet and extraction, the temperature of the hot water in brewing device is remained unchanged.Add by second The mutual cooperation of thermal and temperature sensor can be such that the water temperature in brewing device remains unchanged.

The specific steps for brewing espresso coffee are illustrated below:

Set water temperature is 93 DEG C；

The wet stage: MEBO ribbon gauze 5s, the hydraulic pressure brewed in boiler is rapidly reduced to 3bar from 9bar, and stablizes 3bar or so；Since hot water stream goes out so that brew the hydraulic pressure in boiler reduces naturally.

The high pressure extraction stage: the first predetermined pressure is set as 9bar, the hydraulic pressure brewed in boiler rapidly rises to from 3bar 9bar, and stablize in 9bar or so, the time of high pressure extraction is set as 15s；Make since the water brewed in boiler is gradually heated by the sonochemical activity The pressure that must be brewed in boiler constantly rises, and finally stable in 9bar.

The low pressure extractive stage: setting the second predetermined pressure as 6bar, sets the time of low pressure extractive as 6s, in the time of 6s Pressure is reduced to 6bar from 9bar in range.It is depressured solenoid valve to start to work, reduces brewing pressure, complete last low pressure extraction It takes.

The coffee machine of process and the application that the coffee machine that the prior art is described below brews espresso coffee brews Italian type coffee The process of coffee:

Fig. 2 is pressure changing of the conventional coffee machine in the prior art when brewing espresso coffee, conventional coffee machine Pressure be constant all the time, in the initial period infused coffee without wet process, directly ground coffee is extracted by high pressure, hold It is easier that carbon dioxide is largely discharged, and then influence coffee drinks mouthfeel, and still keeps in latter end extraction process 9bar pressure is easy that ground coffee transition will be made to extract, to generate bitterness sense.

Fig. 3 is the pressure changing using the coffee machine of the application when brewing espresso coffee, utilizes this coffee machine The pressure in each stage constantly changes when infusing coffee, and the pressure in wet stage is gradually decremented to 3bar from 9bar, is similar to hand The process for carrying out bored steaming when making coffee to ground coffee can make the grease in ground coffee is mild to connect with water during bored steaming Touching, makes it be more easier to separate with ground coffee, the carbon dioxide in ground coffee suitable can be discharged at the same time, and grease is more It is fine and smooth.High pressure extraction staged pressure can sufficiently extract the grease in ground coffee in 9bar or so, the pressure of 9bar.? When extracting coffee to endpiece, the solable matter in ground coffee is fewer and fewer, and the coffee machine in the application can be in this stage Low pressure extractive is taken, pressure can be reduced to 6bar from 9bar, prevent extraction from excessively doing while guaranteeing that coffee mouthfeel is complete The espresso coffee of perfect mouthfeel out.

Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or It changes among the protection scope created still in the utility model.

Claims (10)

1. a kind of coffee machine, comprising: female boiler (10), sub- boiler (20) and the water supply device for supplying cold water, the sub- boiler (20) setting is in female boiler (10), the water inlet of mother's boiler (10) and the water inlet difference of the sub- boiler (20) It is connected to the water supply device, mother's boiler (10) is equipped with the first heating for heating the water in female boiler (10) Device (30),

It is characterized in that, the coffee machine further includes the brewing device with water outlet (4211), the brewing device respectively with The water supply device is connected to the sub- boiler (20), so that in the hot water in the sub- boiler (20) and the water supply device Cold water is mixed.

2. a kind of coffee machine according to claim 1, which is characterized in that the coffee machine further includes to the sub- boiler (20) cold water in hot water and the water supply device in carries out uniformly mixed mixing arrangement.

3. a kind of coffee machine according to claim 2, which is characterized in that the brewing device includes spaced brews Boiler (41) and tea infuser, the boiler (41) that brews is connected to the sub- boiler (20), the water supply device, described to brew pot The water container (421) of furnace (41) and the tea infuser passes through the first water stream channel (43) and the second water stream channel setting up and down (44) it is connected to, it is described to brew boiler (41), second water stream channel (44), the water container (421) and first water Circulation road (43) forms circulation loop, and the tea infuser is equipped with secondary heating mechanism (45), described to brew the interior of boiler (41) Described in the inner roof wall, the secondary heating mechanism (45) and the circulation loop that roof is higher than the water container (421) are constituted Mixing arrangement, bottom of water outlet (4211) setting in the water container (421).

4. a kind of coffee machine according to claim 3, which is characterized in that the tea infuser includes pedestal (422) and described Water container (421), the water container (421) are arranged on the pedestal (422), connect downwards at the water outlet (4211) Be connected to outlet conduit, one end far from the water outlet (4211) of the outlet conduit forms brewing mouth (4221), it is described go out Waterpipe is equipped with switch valve.

5. a kind of coffee machine according to claim 4, which is characterized in that the switch valve be two position three-way valve, described two The outlet conduit is divided into the water supply line (424) and brewing pipeline being connected to the water outlet (4211) by position three-way valve (425), the first interface (4231) of the two position three-way valve is connect with the water supply line (424), the two position three-way valve Second interface (4232) is connected to the brewing pipeline (425), and the two position three-way valve has the first interface (4231) The first operating position for being connected to the second interface (4232) and by its third interface (4233) and the second interface (4232) the second operating position being connected to, the position of the brewing mouth (4221) are higher than the position of the second interface (4232), When the two position three-way valve is in second operating position, the water in the brewing pipeline (425) passes sequentially through described second Interface (4232) and the third interface (4233) discharge.

6. a kind of coffee machine according to claim 3, which is characterized in that the tea infuser be equipped with for detect it is described go out The temperature sensor of the temperature of the mouth of a river (4211) or the hot water at the water outlet (4211).

7. a kind of coffee machine according to claim 1, which is characterized in that between the brewing device and the water supply device Equipped with water pump (541).

8. a kind of coffee machine according to claim 7, which is characterized in that the coffee machine further includes and the water pump (541) pressure regulating solenoid valve being arranged in parallel.

9. a kind of coffee machine according to claim 8, which is characterized in that the pressure regulating solenoid valve is decompression solenoid valve.

10. a kind of coffee machine according to claim 7, which is characterized in that the water pump (541) and the brewing device it Between be equipped with flow control valve (522).