CN201230839Y

CN201230839Y - Constant-temperature punching and boiling mechanism

Info

Publication number: CN201230839Y
Application number: CNU2008201192259U
Authority: CN
Inventors: 刘宗熹
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-19
Filing date: 2008-06-19
Publication date: 2009-05-06
Anticipated expiration: 2018-06-19

Abstract

The utility model provides a constant temperature boiling mechanism which comprises a pump, a heating device connected with the pump, a heat exchanger, a boiling unit connected with the heat exchanger and a temperature adjusting unit, wherein the heat exchanger is arranged in the heating device and is connected with the pump, and a feed pipe is arranged between the heat exchanger and the pump; and the temperature adjusting unit is arranged between the boiling unit and the feed pipe and is provided with a cool water cutoff device; after the standby and before beverage boiling for the first, the cool water cutoff device cuts off the cold water by drainage process and the water which flows into the boiling unit is enabled to rapidly and fully preheat the boiling unit to the required temperature of boiling as well as the above structure by hot water which flows out of the heat exchanger. The utility model can enable first boiling temperature to surely keep required temperature, improves temperature control effect, and stabilizes adjusting temperature.

Description

The constant temperature brewing mechanism

Technical field

The utility model be about a kind of be used for dashing make coffee, the brewing mechanism of tea product or other drink, refer to a kind of brewing mechanism especially with temperature control effect of reinforcement.

Background technology

Brewing mechanism is made coffee by applying to dash, the dashing in the system of boiling of tea product or other drink.

The brewing mechanism of prior art, especially refer to a kind of employed brewing mechanism of coffee machine that is commonly called as to the boiler of master and auxiliary pot that has, as shown in Figure 8, mainly comprise a pumping 100, a heater 110, a heat exchanger 120, a cold water pipe 130, a water-supply-pipe 140, a return duct 150, a hot-water line 160, a brewing unit 170, a temperature adjustment pipe 180 and a pressure controller 190.

Wherein, this pumping 100 is connected with cold water pipe 130 and water-supply-pipe 140 and has a water inlet, and pumping 100 is drawn into cold water in this cold water pipe 130 and the water-supply-pipe 140 by water inlet; This water-supply-pipe 140 is connected between this pumping 100 and the heater 110, in heater 110, inject the suitable water yield, usually the heating tank superjacent air space forms steam in the heater 110 so that make to be about 2/3rds capacity of heater 110, end device one pressure controller 190 on the heater 110 controls the startup of heater 110 or cuts out by steam pressure; This heat exchanger 120 is located in the set heating tank of this heater 110 and the one end is provided with a three-way pipe 121 and a cold water intubate 122, three-way pipe 121 is communicated with return duct 150, and this cold water intubate 122 is installed in the three-way pipe 121 and extends towards the inside of this heat exchanger 120 and form and cold water intubate 122 is connected with cold water pipe 130, and the other end of heat exchanger 120 is connected in this hot-water line 160; This hot-water line 160 is connected between this heat exchanger 120 and this brewing unit 170; This brewing unit 170 is located between this hot-water line 160 and the return duct 150 and is had one towards boiling a magnetic valve 171 and a filter bowl 172, and the hot water that comes from hot-water line 160 boils magnetic valve 171 and filter bowl 172 by dashing of brewing unit 170, extracts and make required drink; This return duct 150 is connected between this brewing unit 170 and this three-way pipe 121, enters in the heat exchanger 120 by three-way pipe 121 so as to entering the water guiding that produces after the steam condensation in this brewing unit 170 by hot-water line 160; And these temperature adjustment pipe 180 1 ends are connected in this hot-water line 160, and the other end is connected with cold water pipe 130 and is communicated with cold water intubate 122, so as to will be by the cold water drainage in the cold water pipe 130 to hot-water line 160.

Dashing in the system of boiling of the brewing mechanism that uses prior art, when being in holding state towards the system of boiling, system can start heater 110 makes the water in the heater 110 be heated, and the water in the heat exchanger 120 can carry out heat exchange action with the hot water in the heater 110 and be heated to a stable temperature and produce steam, steam can enter brewing unit 170 via hot-water line 160 and cooling condenses into water, and reflux via return duct 150 and to stimulate the menstrual flow this three-way pipe 121 and flow back in the heat exchanger 120, and a continuous process is finished the action of this brewing unit 170 of preheating thus, make coffee or during drink such as tea, can carry out the extraction action of drink to guarantee to dash with the stable high temperature of a control.

Be in and dash when boiling the drink state when dashing the system of boiling, can start dashing of pumping 100 and brewing unit 170 towards the system of boiling and boil magnetic valve 171, cold water enters cold water pipe 130 via pumping 100, connect and enter in regular turn in cold water intubate 122, the heat exchanger 120, the water that is preheated when holding state in cold water and the heat exchanger 120 mixes, connect and enter in the brewing unit 170 with return duct 150, and finish extraction by filter bowl 172 outflows through hot-water line 160 and through this three-way pipe 121.

Because various drinks such as coffee or tea product all have preferable extraction temperature separately, in addition, the temperature difference of the water that draws by pumping 100, therefore in order to reach the purpose of adjusting temperature, the brewing mechanism of prior art is directed to cold water in the hot-water line 160 and reaches the effect of adjustment temperature by the temperature adjustment pipe 180 between cold water pipe 130 and hot-water line 160.

Yet the brewing mechanism of prior art has following shortcoming:

At first, when dashing of pumping 100 and brewing unit 170 boiled magnetic valve 171 and is activated, cold water can pour in the heat exchanger 120 and mixes with the water through preheating in the heat exchanger 120 via cold water intubate 122, mixed hot water can enter brewing unit 170 by hot-water line 160 and return duct 150 to be mixed once again, therefore dashing of brewing unit 170 boiled magnetic valve 171 and is activated the initial hot water temperature of flowing out in back for the highest, and need just can make by the temperature of heat exchanger 120 through hot-water line 160 and the hot water in return duct 150 and tend towards stability via repeating continuous operation.

Secondly, if the brewing mechanism of prior art is used for dashing when boiling the drink of different volumes, because required water yield difference, therefore also different in the unit interval by the water yield in cold water pipe 130 inflow heat exchangers 120, and with mix and the temperature of water through hot-water line 160 enters brewing unit 170 in also can be different through the waters of preheating in the heat exchanger 120, the temperature that therefore causes the filter bowl 172 of brewing unit 170 to extract can instability.

Moreover, can carry out the adjustment of water temperature by this temperature adjustment pipe 180 though flow into the hot water of brewing unit 170, but owing to flow into the water of brewing unit 170, the temperature that comprises the water that comes from hot-water line 160 and return duct 180 also is unsettled, thus the brewing mechanism of prior art have can't the stable regulation temperature shortcoming.Moreover, may make the temperature state that tapers off that dashes continuously when boiling when boiling the larger capacity drink because of heat exchanger 120 heat exchange areas are not enough when dashing.

The utility model content

Based on above-mentioned, the utility model still has some shortcomings or inconvenience at the brewing mechanism of prior art, and then design a kind of brewing mechanism with constant temperature effect, and this brewing mechanism possesses and need not the repetition continued operation and carry out heat exchange or hot and cold water and mix the brewing mechanism of novelty that action can have the effect of stable regulation temperature, and has the function of stable regulation temperature.

The utility model is a kind of constant temperature brewing mechanism, and it comprises:

One pumping has the water inlet that a cooling water enters;

One cold water pipe assembly, the one end is connected with this pumping;

One water-supply-pipe, the one end is connected with this pumping;

One heater has the heater that a heating tank and that is communicated with this water-supply-pipe is positioned at this heating tank;

One heat exchanger has a heat exchange unit, and this heat exchange unit is located in the heating tank of this heater, and has an accommodation space;

One service pipe, one end are located between this heat exchanger and this cold water pipe assembly and are connected with accommodation space one end of the heat exchange unit of this heat exchanger;

One hot-water line, one end join with this heat exchanger and are connected with the accommodation space other end of the heat exchange unit of this heat exchanger;

One brewing unit, itself and this hot-water line other end joins, and extracts and make required drink in order to the water that utilizes hot-water line to flow into; And

One temperature adjustment unit, it is located between this brewing unit and the cold water pipe assembly, in order to the temperature that will enter the water in the brewing unit in order to adjustment to brewing unit by the water drainage that the cold water pipe assembly other end flows out, and this temperature adjustment unit has a cold water cutting device, this cold water cutting device is located between this brewing unit and the cold water pipe assembly, in order to block the cold water from the cold water pipe assembly.

Based on said structure, constant temperature brewing mechanism of the present utility model has the temperature control effect of improvement, need not the repetition continued operation simultaneously carries out heat exchange or hot and cold water and mixes the effect that action can have the stable regulation temperature, can reach the effect of stable regulation temperature, and have and to solve prior art, boil temperature and can cross low and must dash continuously to boil and just edge up to desires temperature for several times dashing first, perhaps first towards boiling the meeting overtemperature along with continuous problem of gradually falling towards boiling.

Description of drawings

Fig. 1 is the stereo appearance figure of first preferred embodiment of constant temperature brewing mechanism of the present utility model.

Fig. 2 is the stereo appearance figure of second preferred embodiment of constant temperature brewing mechanism of the present utility model.

Fig. 3 is the stereo appearance figure of the 3rd preferred embodiment of constant temperature brewing mechanism of the present utility model.

Fig. 4 is the stereo appearance figure of the 4th preferred embodiment of constant temperature brewing mechanism of the present utility model.

Fig. 5 is the stereo appearance figure of the 5th preferred embodiment of constant temperature brewing mechanism of the present utility model.

Fig. 6 is the stereo appearance figure of the 6th preferred embodiment of constant temperature brewing mechanism of the present utility model.

Fig. 7 is the stereo appearance figure of the 7th preferred embodiment of constant temperature brewing mechanism of the present utility model.

Fig. 8 is the stereo appearance figure of the brewing mechanism of prior art.

The specific embodiment

The utility model provides a kind of constant temperature brewing mechanism, as shown in Figure 1, it comprises a pumping 10, a heater 20, a heat exchanger 30, a cold water pipe assembly 40, a water-supply-pipe 50, a service pipe 60, a hot-water line 70, a brewing unit 80 and a temperature adjustment unit 90.

This pumping 10 has water inlet that a cooling water enters and is connected with cold water pipe assembly 40 and water-supply-pipe 50 at delivery port.

These cold water pipe assembly 40 one ends are connected with this pumping 10 and have a water inlet pipe 41, a non-return valve 42, an outlet pipe 43 and a flowmeter 44; Wherein, these water inlet pipe 41 1 ends are to be connected with pumping 10, and are provided with non-return valve 42 thereon; And this outlet pipe 43 is connected between this water inlet pipe 41 and this service pipe 60, and and water inlet pipe 41 between be provided with this flowmeter 44, so as to the discharge of metering through flowmeter 44.

This water-supply-pipe 50, the one end is connected with pumping 10, and the other end is connected to this heater 20, the water that will come from pumping 10 whereby is delivered to this heater 20.

This heater 20 is connected with this water-supply-pipe 50 and has the heater 22 that a heating tank 21 and that is communicated with water-supply-pipe 50 is positioned at this heating tank 21, so as to heating the water that is flowed in the heating tanks 21 by water-supply-pipe 50; And preferably, this heater 20 further has a pressure controller 23, and this pressure controller 23 is installed on this heater 20, so as to the steam pressure of detecting these heater 20 heating tanks 21 tops and control the unlatching of heater 20 or close.

These heat exchanger 30 1 ends are connected in this service pipe 60, the other end is connected in this hot-water line 70, and has a heat exchange unit 31, this heat exchange unit 31 is located in the heating tank 21 of this heater 20, and have an accommodation space, this accommodation space is communicated with this service pipe 60 and this hot-water line 70.

This hot-water line 70 is located between this heat exchanger 30 and this brewing unit 80, and one end and this heat exchanger 30 join, and the other end is connected with this brewing unit 80, and can unidirectionally flow out to brewing unit 80.

This brewing unit 80 is located between this hot-water line 70 and this temperature adjustment unit 90 and is had one and dashes and to boil magnetic valve 81 and filter bowl 82, and the hot water that comes from hot-water line 70 sees through brewing unit 80 and flows out to filter bowl 82, extracts and make required drink.

This temperature adjustment unit 90 is located between this brewing unit 80 and the service pipe 60, in order to the water drainage that will flow out by cold water pipe assembly 40 to brewing unit 80 and the temperature that enters the water in the brewing unit 80 in order to adjustment, and this temperature adjustment unit 90 has at least one cold water cutting device 901, cold water cutting device 901 is located between this brewing unit 80 and the cold water pipe assembly 40 in order to block the cold water from cold water pipe assembly 40, the water that enters brewing unit 80 with order all is the hot water that comes from hot-water line 70, preferably, this cold water cutting device 901 is normal-open electromagnetic valves, when normal-open electromagnetic valve is activated, can make wherein path locking, form and open circuit and block cold water from cold water pipe assembly 40; Preferably, this temperature adjustment unit 90 has an orifice union and a temperature adjustment pipe 92, this orifice union and a temperature adjustment pipe 92 connect two ends of position at cold water cutting device 901 respectively, wherein these temperature adjustment pipe 92 1 ends are connected with this brewing unit 80 via cold water cutting device 901 and orifice union, and the other end is connected in service pipe 60 and outlet pipe 43; This orifice union is located on this temperature adjustment pipe 92, for regulating discharge in the temperature adjustment pipe 92; Preferably, this orifice union is a choke valve 91; Optionally, shown in Fig. 6,7, this orifice union can be a throttling joint 99.As used herein, throttling joint 99 has suitable aperture can produce suitable flow, passes through so as to the water of allowing suitable flow.

Based on said structure, when the utility model is delivered to water-supply-pipe 50 by pumping 10 with cold water during in standby, and be delivered to this heater 20, and then the cold water that utilizes this heater 20 will come from pumping 10 is heated into hot water and steam, the heating tank 21 interior water yields of wherein injecting heater 20 are about 2/3rds capacity of heating tank 21 usually, so that there is the space of a ccontaining steam heating tank 21 tops of heater 20, and by the pressure of the pressure controller 23 detecting heating tanks 21 top steams of heater 20 tops, start or close heater 22 with control, wherein on the steam pressure, lower limit can be set at: 1～1.2 Ba Er (bar) for example; Make the heat exchange unit 31 interior cold water of heat exchanger 30 to carry out heat exchange whereby through the hot water in the heating tank 21 of heat exchanger 30 and heater 20, and by the up cold physical characteristic down of heat, the steam that produces in the heat exchanger 30 up becomes condensate water through hot-water line 70 and brewing unit 80 heat radiations, be back to heat exchange unit 31 through service pipe 60, finish the preheating of brewing unit 80, make brewing unit 80 keep certain temperature.

When constant temperature brewing mechanism of the present utility model is activated, the dashing of this pumping 10 and this brewing unit 80 boiled magnetic valve 81 and is activated, can cold water be drawn in the pumping 10 by water inlet by pumping 10, and be delivered to cold water pipe assembly 40 via pumping 10, and then unidirectional heat exchange unit 31 interior close service pipe 60 places that are delivered to this heat exchanger 30 by service pipe 60 of part cold water, make the interior cold water of heat exchange groove of heat exchanger 30 to carry out heat exchange whereby through the hot water in the heating tank 21 of heat exchanger 30 and heater 20, and simultaneously with the hot water extrudate flow of heat exchanger 30 upper ends to this hot-water line 70, and enter to this brewing unit 80 by hot-water line 70, and before starting the constant temperature brewing mechanism first after the utility model standby, start drainage procedure earlier, also promptly start dashing in cutting device and the brewing unit 80 and boil magnetic valve 81, come from cold water pipe assembly 40 and see through temperature adjustment unit 90 and enter among the brewing unit 80 to block, the water that enter in the brewing unit 80 this moment all is the hot water that comes from hot-water line 70, therefore can be apace the temperature of brewing unit 80 be increased to the temperature of being desired, and be that suitable dashing boiled temperature and need do not carried out drainage procedure when brewing mechanism starts the back and carries out the temperature of dashing continuously when boiling program because of brewing unit 80, close this cold water cutting device 901, and a part of cold water that comes from cold water pipe assembly 40 of order is adjusted suitable flow cold water reaches the water drainage in the cold water pipe assembly 40 regulating and controlling temperature to brewing unit 80 purpose through the choke valve 91 of temperature adjustment unit 90.

In another preferred embodiment of the present utility model, please cooperate with reference to figure 2,4, shown in 7, wherein foundation this heat exchanger 30A of the present utility model has the heat exchange unit 31A more than two, 31B, each

heat exchange unit

31A, 31B is connected in series mutually, also promptly be connected with a tube connector 60 in regular turn, one heat exchange unit 31A, an one heat exchange unit 31B and a hot-water line 70, so as to increasing the heat exchange area between heat exchanger 30A and the heater 20, boil for dashing of the drink that is used for big volume, also can reach the effect that still has good heat exchanger effectiveness under the situation of boiling and reach the stable temperature control of enhancing dashing continuously simultaneously.

In better embodiment of the present utility model, shown in Fig. 3,4, wherein this temperature adjustment unit 90A has two orifice unions, a temperature adjustment pipe 92A, a manifold 92B, two

magnetic valve

93A, 93B; Wherein, this temperature adjustment pipe 92A is located between this brewing unit 80 and the service pipe 60; This manifold 92B is located between this brewing unit 80 and this cold water pipe assembly 40; These orifice unions can be two

choke valve

91A, 91B, and

choke valve

91A, 91B are located at respectively on this temperature adjustment pipe 92A and the manifold 92B, for regulating fluid flow in temperature adjustment pipe 92A and the manifold 92B; Cold water cutting device 901 is installed on magnetic valve 93A and same group of pipeline of temperature adjustment pipe 92A, and this two

magnetic valve

93A, 93B are located at this temperature adjustment pipe 92A respectively and manifold 92B goes up between this two choke valves 91A91B and this brewing unit 80.

Whereby, in this embodiment, have two groups of choke valve 91A altogether, 91B and

magnetic valve

93A, 93B, during use, wherein one group magnetic valve 93A is an open type, itself and open type cold water cutting device 901 are arranged on the same pipeline, and the magnetic valve 93B of another group is a closed type, and this

choke valve

91A, 91B is adjusted to appropriate state separately so that the interior controlled proper proportion that is of flow of temperature adjustment pipe 92A and manifold 92B, and make finally have different temperature to come towards boiling the drink of different temperatures demand by the glassware for drinking water that enters in the brewing unit 80, for example 95 ℃ are available for towards boiling black tea, coffee is available for towards boiling green tea and reach 85 ℃.

For example, when constant temperature brewing mechanism of the present utility model when temperature to boil water is set at 95 ℃, two groups of

magnetic valve

93A, 93B all keep not starting state, and cold water can enter the water that brewing unit 80 and the hot water that comes from hot-water line 70 is mixed into 95 ℃ via the magnetic valve 93A of open type and boil drink for dashing; When constant temperature brewing mechanism of the present utility model when temperature to boil water is set at 85 ℃, two groups of

magnetic valve

93A, 93B all are activated, this normal-open electromagnetic valve 93A can close, and closed type magnetic valve 93B can become open state, and cold water can enter the water that brewing unit 80 and hot water is mixed into 85 ℃ by closed type magnetic valve 93B and boiled drink for dashing this moment.

In another preferred embodiment of the present utility model, as shown in Figure 5, wherein the orifice union among this temperature adjustment unit 90C is a choke valve 91C, and this choke valve 91C is located in this brewing unit 80 near temperature adjustment pipe 92C place.

Based on said structure, the utility model is compared to the advantage that prior art had:

At first, because when constant temperature brewing mechanism of the present utility model is activated, cold water is from the cold water pipe assembly 40 that stimulates the menstrual flow, service pipe 60 enters

heat exchanger

30,30A, simultaneously with

heat exchanger

30,30A is near the unidirectional outflow of water at hot-water line 70 places, can reach and guarantee from heat exchanger 30, the water that 30A flows out is the hot water of the highest temperature, and when preheating brewing unit 80, can start dash by drainage procedure and boil the cold water that magnetic valve 81 and cold water cutting device 901 will come from cold water pipe assembly 40 and all block, and the water that order enters in the brewing unit 80 all is the hot water that comes from hot-water line 70, to boil unit 80 rapidly and be preheated to proper temperature through discharging the suitable elevated temperature heat water yield, therefore constant temperature brewing mechanism of the present utility model does not have to dash first and boils temperature and can cross low and must dash continuously to boil and just edge up to desires temperature for several times, perhaps first towards boiling the meeting overtemperature along with continuous problem of gradually falling towards boiling;

Secondly, when cold water cutting device 901 is closed, and only there is the cold water of suitable flow can be by temperature adjustment unit 90,90A, 90C enters brewing unit 80, all the other most cold water all can be by service pipe 60 unidirectional inflow heat exchangers 30, and in moment that constant temperature brewing mechanism of the present utility model starts, cold water can directly enter in the service pipe 60 and delivery heat exchanger 30 by cold water

pipe fitting group

40,30A, has only single flow direction heat exchanger 30 in the service pipe 60, the cold water of 30A, can not look like prior art, please refer to shown in Figure 8, hot water in its heat exchanger 120 also can enter brewing unit 170 via return duct 150, and the utility model is by temperature adjustment unit 90,90A, the water that 90C enters in the brewing unit 80 is all the cold water that flows out from cold water pipe fitting group 40, and do not have by

heat exchanger

30,30A through service pipe 60 by temperature adjustment unit 90,90A, the hot water that 90C refluxes, therefore brewing unit 80 can be by hot-water line 70 hot-water supplies, and by temperature adjustment unit 90,90A, the 90C drainage is from the cold water temperature adjustment of cold water pipe assembly 40, so as to obtaining more stable temperature; And

Moreover, discharging the hot-water line 70 that stimulates the menstrual flow by

heat exchanger

30,30A enters brewing unit 80 and is entered the temperature of water of brewing unit 80 by temperature adjustment unit 90,90A, 90C all comparatively stable, therefore its etc. mixed water temperature also can be comparatively stable, therefore can mix with quantitative ratio according to demand, and be applicable to different drinks, for example coffee, tea product or other drink etc.

Claims

1. constant temperature brewing mechanism is characterized in that comprising:

One pumping has the water inlet that a cooling water enters;

One cold water pipe assembly, the one end is connected with this pumping;

One water-supply-pipe, the one end is connected with this pumping;

One temperature adjustment unit, it is located between this brewing unit and the cold water pipe assembly, in order to the temperature that will enter the water in the brewing unit in order to adjustment to brewing unit by the water drainage that the cold water pipe assembly other end flows out, and this temperature adjustment unit has at least one cold water cutting device, and this cold water cutting device is located between this brewing unit and the cold water pipe assembly in order to block from cold water pipe assembly cold water.

2. constant temperature brewing mechanism as claimed in claim 1, it is characterized in that: this temperature adjustment unit has an orifice union, a temperature adjustment pipe and a cold water cutting device, wherein this temperature adjustment pipe is located between this brewing unit and the cold water pipe assembly, and this orifice union is located on this temperature adjustment pipe, for regulating temperature adjustment in-pipe flow amount, and this cold water cutting device is located on this temperature adjustment pipe and between this orifice union and cold water pipe assembly.

3. constant temperature brewing mechanism as claimed in claim 1 is characterized in that: this temperature adjustment unit has two orifice unions, a temperature adjustment pipe, a manifold, two magnetic valves and secondary cooling water cutting device; Wherein, the temperature adjustment pipe is located between this brewing unit and the cold water pipe assembly; Manifold is located between this brewing unit and this cold water pipe assembly; This two orifice union is located at respectively on this temperature adjustment pipe and the manifold, for regulating fluid flow in temperature adjustment pipe and the manifold respectively; This two magnetic valve is located at respectively on this temperature adjustment pipe and the manifold between this two orifice union and this brewing unit; And this secondary cooling water cutting device is located on the temperature adjustment pipe respectively and between orifice union and cold water pipe assembly.

4. constant temperature brewing mechanism as claimed in claim 2 is characterized in that: the orifice union of temperature adjustment unit is the throttling joint.

5. constant temperature brewing mechanism as claimed in claim 3 is characterized in that: the orifice union of temperature adjustment unit is the throttling joint.

6. constant temperature brewing mechanism as claimed in claim 2 is characterized in that: the orifice union of temperature adjustment unit is a choke valve.

7. constant temperature brewing mechanism as claimed in claim 3 is characterized in that: the orifice union of temperature adjustment unit is a choke valve.

8. as each described constant temperature brewing mechanism of claim 1～7, it is characterized in that: this heater is equipped with a pressure controller, so as to the detecting heater heating tank in a pressure and control heater unlatching or close.

9. as 1 to 7 each described constant temperature brewing mechanism of claim the, it is characterized in that: this heat exchanger has the heat exchange unit more than two, and each heat exchange unit interconnects, so as to increasing the heat exchange area between heat exchanger and the heater.

10. constant temperature brewing mechanism as claimed in claim 9 is characterized in that, this cold water pipe assembly has:

One water inlet pipe, it is connected with this pumping;

One non-return valve, it is located on this water inlet pipe;

One outlet pipe, it is connected between this water inlet pipe and this service pipe and this temperature adjustment unit; And

One quantifier, it is located on the outlet pipe, so as to the discharge of metering through flowmeter.