CN201365829Y

CN201365829Y - Constant-temperature brew mechanism

Info

Publication number: CN201365829Y
Application number: CNU2009200040728U
Authority: CN
Inventors: 刘宗熹
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-22
Filing date: 2009-01-22
Publication date: 2009-12-23
Anticipated expiration: 2019-01-22

Abstract

The utility model relates to a constant-temperature brew mechanism, which comprises a pump, a heating device connected with the pump, a heat exchanger arranged in the heating device and connected with the pump, a brew unit connected with the heat exchanger, a return pipe arranged between the heat exchanger and the brew unit, and a temperature adjusting unit arranged between the pump and the return pipe. The return pipe is provided with a one-way valve which is arranged between the heat exchanger and brew unit, thereby preventing cold water from the pump from flowing into the brew unit through the return pipe, so that the water flowing into the brew unit is mixture of water out of the heat exchanger and the cold water of limited flow out of the cold water pipe mixed at an appropriate temperature. In addition, the hot water pipe is provided with a throttle unit to control the flow rate of the return water and control the preheating brew unit to the required temperature. Therefore, the utility model can maintain the temperature for first brewing at the required temperature, and has the functions of improving the temperature controlling effects and stabilizing the adjusted temperature.

Description

The constant temperature brewing mechanism

Technical field

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

Background technology

Brewing mechanism is applied to dash boils the dashing in the system of boiling of adopted formula coffee, tea product or other drinks.

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 6, mainly comprise a pump 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, described pump 100 is connected with cold water pipe 130 and water-supply-pipe 140 and has a water inlet, and pump 100 is drawn into cold water in described cold water pipe 130 and the water-supply-pipe 140 by water inlet; Described water-supply-pipe 140 is connected between described pump 100 and the heater 110, in heater 110, inject the suitable water yield, usually be about 2/3rds capacity of heater 110 so that make the space of heating tank top in the heater 110 form steam, end device one pressure controller 190 on the heater 110 relies on steam pressure to be controlled the startup of heater 110 or cut out; Described heat exchanger 120 is located in the set heating tank of described 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 described cold water intubate 122 devices form towards the extension of the inside of described heat exchanger 120 in three-way pipe 121 and cold water intubate 122 is connected with cold water pipe 130, and the other end of heat exchanger 120 is connected in described hot-water line 160; Described hot-water line 160 is connected between described heat exchanger 120 and the described brewing unit 170; Described brewing unit 170 is located between described hot-water line 160 and the return duct 150 and has 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; Described return duct 150 is connected between described brewing unit 170 and the described three-way pipe 121, enters in the heat exchanger 120 by three-way pipe 121 entering the water guiding that produces after the steam condensation in the described brewing unit 170 by hot-water line 160; And described temperature adjustment pipe 180 1 ends are connected in described hot-water line 160, and the other end is connected with cold water pipe 130 and is communicated with cold water intubate 122, with 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 flow back in the heat exchanger 120 through described three-way pipe 121 via return duct 150, and rely on this continuous process to finish the action of the described brewing unit 170 of preheating, 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 pump 100 and brewing unit 170 towards the system of boiling and boil magnetic valve 171, cold water enters cold water pipe 130 via pump 100, connect and enter in regular turn in cold water intubate 122, the heat exchanger 120, the water that cold water is preheated during with heat exchanger 120 inherent holding states 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 described 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 pump 100, therefore in order to reach the purpose of adjusting temperature, the brewing mechanism of prior art is to rely on temperature adjustment pipe 180 between cold water pipe 130 and hot-water line 160 cold water to be directed in the hot-water line 160 and the effect that reaches the adjustment temperature.

Yet the brewing mechanism of prior art has following shortcoming:

At first, when dashing of pump 100 and brewing unit 170 boiled magnetic valve 171 and is activated, cold water can via in cold water intubate 122 inflow heat exchangers 120 and with heat exchanger 120 in mix through the water of preheating, can enter brewing unit 170 by hot-water line 160 and return duct 150 respectively through mixed hot water mixes 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 via continuous operation, make by heat exchanger 120 through the lapse of temperature to of hot-water line 160 and hot water in return duct 150 stable status comparatively.

Secondly, if the brewing mechanism of prior art is used for dashing when boiling not isometric drink, 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 rely on described temperature adjustment pipe 180 to carry out the adjustment of water temperature 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 150 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.

Summary of the invention

Based on above-mentioned, the utility model still has some shortcomings at the brewing mechanism of prior art, and then design a kind of brewing mechanism with constant temperature effect, and described 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 pump has the water inlet that a cooling water enters;

One cold water pipe assembly, it has first end that is connected with described pump, one second end and the 3rd end;

One water-supply-pipe, the one end is connected with described pump;

One heater, it is connected with the water-supply-pipe other end, and has the heater that a heating tank and that is connected with described water-supply-pipe is positioned at described heating tank;

One heat exchanger is to have at least one heat exchange unit, and described heat exchange unit is located in the heating tank of described heater, and has an accommodation space;

One return duct, its second end with heat exchanger, described cold water pipe assembly is connected, and is provided with a check valve, and wherein said check valve control stream is the flow direction of the heat exchange unit of heat exchanger on one day;

One hot-water line, one end and described heat exchanger join, and are connected with the accommodation space of the heat exchange unit of heat exchanger, and which is provided with a restricting element;

One brewing unit, it is located between described hot-water line and the return duct, join with the described hot-water line other end, extract and make required drink after the water that is used for utilizing water that hot-water line flows into and cold water pipe to flow into is mixed into proper temperature, and second end of brewing unit and cold water pipe assembly is respectively with the return duct binding and be positioned at the both sides of check valve; And

One temperature adjustment unit, it is located between the 3rd end and return duct of described cold water pipe assembly, be used for the water drainage that to flow out by cold water pipe assembly the 3rd end to return duct and then enter brewing unit, be used for adjusting the temperature that enters the water in the brewing unit, and each temperature adjustment unit is to have at least one temperature adjustment pipe assembly, each temperature adjustment pipe assembly comprises a temperature adjustment pipe and a restricting element, described temperature adjustment pipe is located at the 3rd end and the return duct of cold water pipe assembly and locates between check valve and brewing unit, described restricting element is located on the described temperature adjustment pipe, to adjust the discharge by the temperature adjustment pipe.

Compared with prior art, adopt the advantage that the utlity model has of technique scheme to be: based on said structure, constant temperature brewing mechanism of the present utility model is the temperature control effect with 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 brewing mechanism of prior art.

Description of reference numerals: 10-pump; The 20-heater; The 21-heating tank; The 22-heater; The 23-pressure controller; The 30-heat exchanger; The 31-heat exchange unit; The 31A-heat exchange unit; The 31B-heat exchange unit; 40-cold water pipe assembly; The 41-water inlet pipe; The 42-non-return valve; The 43-outlet pipe; The 44-flowmeter; The 50-water-supply-pipe; The 60-return duct; The 61-check valve; The 70-hot-water line; 71A, 71B-restricting element; The 80-brewing unit; 81-dashes and boils magnetic valve; The 82-filter bowl; 90,90A, 90B-temperature adjustment pipe assembly; 91,91A, 91B-temperature adjustment pipe; 92,92A, 92B-restricting element; 93A, 93B-magnetic valve; The 100-pump; The 110-heater; The 120-heat exchanger; The 121-three-way pipe; 122-cold water intubate; The 130-cold water pipe; The 140-water-supply-pipe; The 150-return duct; The 160-hot-water line; The 170-brewing unit; 171-dashes and boils magnetic valve; The 172-filter bowl; 180-temperature adjustment pipe.

The specific embodiment

The utility model provides a kind of constant temperature brewing mechanism, as Fig. 1, Fig. 2 and shown in Figure 3, it comprises a pump 10, a heater 20, a heat exchanger 30, a cold water pipe assembly 40, a water-supply-pipe 50, a return duct 60, a hot-water line 70, a brewing unit 80 and a temperature adjustment unit.

Described pump 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.

Described cold water pipe assembly 40 one ends are connected with described pump 10 and have a water inlet pipe 41, a non-return valve 42, an outlet pipe 43 and a flowmeter 44; Wherein, described water inlet pipe 41 has one first end and a water side is connected with pump 10, and is provided with non-return valve 42 thereon; And described outlet pipe 43 has a connecting end, one second end and one the 3rd end, wherein said connecting end is connected in the water side of described water inlet pipe 41, and second end and the 3rd end are to be connected with described return duct 60 and described temperature adjustment unit respectively, and be provided with described flowmeter 44 between described outlet pipe 43 and the water inlet pipe 41, with the discharge of metering through flowmeter 44.

Described water-supply-pipe 50, the one end is connected with pump 10, and the other end is connected to described heater 20, the water that so will come from pump 10 is delivered to described heater 20.

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

Described heat exchanger 30 1 ends are connected in described return duct 60, the other end is connected in described hot-water line 70, and has a heat exchange unit 31, described heat exchange unit 31 is located in the heating tank 21 of described heater 20, and have an accommodation space, two ends of described accommodation space are to be communicated with described return duct 60 and described hot-water line 70 respectively.

Described return duct 60 and heat exchanger 30, second end of the outlet pipe 43 of described cold water pipe assembly 40 and be connected with described brewing unit 80 threes, and return duct 60 and the junction of second end of the outlet pipe 43 of cold water pipe assembly 40 and brewing unit 80 between be provided with a check valve 61, wherein said check valve 61 control streams are the A that flows to of heat exchanger 30 heat exchange unit 31 on one day, can't be directly by in the return duct 60 reverse inflow brewing units 80 to allow from the cold water of cold water pipe assembly 40, when system is dashing when boiling state, system's control starts pump 10 and magnetic valve 81, when current are flowed through outlet pipe 43, because of being subjected to partly cold water inflow brewing unit of restricting element 92 throttlings restriction, and flowed to by check valve 61 to limit another partly cold water flow to heat exchange unit 31, and push the hot water of heat exchange unit 31 upper ends to hot-water line 70.

Described hot-water line 70 is located between described heat exchanger 30 and the described brewing unit 80, and one end and described heat exchanger 30 join, and the other end is connected with described brewing unit 80, and can unidirectionally flow out to brewing unit 80, which is provided with a restricting

element

71A, 71B, please cooperate with reference to figure 1, Fig. 2 and Fig. 3.Can be choke valve or throttling joint as used herein, the throttling joint is to have suitable aperture can produce suitable flow, passes through with the water of allowing suitable flow, and can control to dash and boil a preheat temperature of 80.

Described brewing unit 80 is located between described hot-water line 70 and the return duct 60, join with described hot-water line 70 other ends, brewing unit 80 is connected to the both sides that return duct 60 is positioned at check valve 61 separately with second end of the outlet pipe 43 of aforementioned cold water pipe assembly 40, brewing unit 80 has one towards boiling a magnetic valve 81 and a filter bowl 82, and the hot water that comes from hot-water line 70 flows out to filter bowl 82 by brewing unit 80, extracts and make required drink.Described temperature adjustment unit is located between the 3rd end and return duct 60 of outlet pipe 43 of described cold water pipe assembly 40, be used for the water drainage that will flow out by outlet pipe 43 the 3rd end of cold water pipe assembly 40 to the return duct 60 check valve 61 and brewing unit 80 between locate and then enter in the brewing unit 80, be used for adjusting the flow that enters the water in the brewing unit 80, and described temperature adjustment unit has at least one temperature adjustment pipe assembly 90, each temperature adjustment pipe assembly comprises a temperature adjustment pipe 91 and a restricting element 92,92C, the 3rd end and return duct 60 that described temperature adjustment pipe 91 connects the outlet pipe 43 of cold water pipe assembly 40 are located between check valve 61 and brewing unit 80, described restricting element 92,92C is located on the described temperature adjustment pipe 91, to adjust the discharge by temperature adjustment pipe 91; Temperature adjustment pipe assembly is located at the flow that is used for adjusting between described cold water pipe assembly 40 and the return duct 60 from the cold water of cold water pipe assembly 40, and the water that enters brewing unit 80 with order all is through the cold water of control flow and the hot water that comes from hot-water line 70.

In another preferred embodiment of the present utility model, please cooperate with reference to shown in Figure 4, be the heat exchange unit 31A that has more than two wherein according to described heat exchanger 30A of the present utility model, 31B, each heat exchange unit 31A, 31B is connected in series mutually, also promptly be connected with a return duct 60 in regular turn, one heat exchange unit 31A, an one heat exchange unit 31B and a hot-water line 70, to increase 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, as shown in Figure 5, wherein said temperature adjustment unit is located at described cold water pipe assembly 40 and return duct 60 is located between check valve 61 and brewing unit 80, and temperature adjustment pipe assembly 90A with two parallel connections, 90B, each temperature

adjustment pipe assembly

90A, 90B is except comprising a temperature adjustment pipe 91A, a 91B and a restricting element 92A, outside the 92B, more comprise a

magnetic valve

93A, 93B, wherein each temperature adjustment pipe assembly 90A, the temperature adjustment pipe 92A of 90B, 92B is arranged on the 3rd end and the return duct 60 of the outlet pipe 43 of described cold water pipe assembly 40 and locates between check valve 61 and brewing unit 80; Restricting

element

92A, 92B can be choke valve or throttling joint, and restricting

element

92A, 92B are located on corresponding temperature adjustment pipe 91A, the 91B, for regulating discharge in temperature adjustment pipe 91A, the 91B;

Magnetic valve

93A, 93B are located on corresponding temperature adjustment pipe 91A, the 91B, preferably lay respectively between each self-

corresponding restricting element

92A, 92B and the return duct 60.

So, in this embodiment, have two groups of restricting

element

92A, 92B and

magnetic valve

93A, 93B altogether, during use, described restricting

element

92A, 92B are adjusted to appropriate state separately so that the interior controlled proper proportion that is of flow of each

temperature adjustment pipe

91A, 91B, and make and finally to enter return duct 60 and the discharge ratio in the brewing unit 80 of entering to is different and hot water that obtain different temperature boils the drink of different temperatures demand to dash, for example 95 ℃ are available for dashing and boil black tea, coffee, and and 85 ℃ be available for dashing and boil green tea.

For example, when constant temperature brewing mechanism of the present utility model when temperature to boil water is set at 95 ℃, the suitable cold water flow of the restricting element 92A of the one temperature adjustment pipe assembly 90A restriction temperature adjustment pipe 91A that flows through wherein, and its corresponding magnetic valve 93A opens, and the magnetic valve 93B of another temperature adjustment pipe assembly 90B keeps not starting state, and cold water is mixed into 95 ℃ water to limit suitable cold water flow to enter brewing unit 80 through return duct 60 with the hot water that comes from hot-water line 70 by restricting element 92A through the temperature adjustment pipe 91A of described one temperature adjustment pipe assembly 90A and boils drink for dashing; When constant temperature brewing mechanism of the present utility model when temperature to boil water is set at 85 ℃, the magnetic valve 93B of described another temperature adjustment pipe assembly 90B starts, the magnetic valve 93A of described one temperature adjustment pipe assembly 90A then closes, and the magnetic valve 93B that this moment, cold water can be by correspondence is mixed into 85 ℃ water for towards boil drink to limit suitable cold water flow to flow into brewing unit 80 through return duct 60 with hot water by restricting element 92B.

Based on said structure, when the utility model relies on pump 10 during in standby cold water is delivered to water-supply-pipe 50, and be delivered to described heater 20, and then the cold water that utilizes described heater 20 will come from pump 10 is heated into hot water and steam, the heating tank 21 interior water yields of wherein injecting heater 20 are about three minutes two capacity of heating tank 21 usually, so that there is the space of a ccontaining steam heating tank 21 tops of heater 20, and the pressure controller 23 that relies on heater 20 tops is detected the pressure of heating tanks 21 top steam, 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; So make heat exchanger 30, the heat exchange unit 31 of 30A, 31A, cold water in the 31B can pass through heat exchanger 30, hot water in the heating tank 21 of 30A and heater 20 carries out heat exchange, and by means of the up cold physical characteristic down of heat, heat exchanger 30, the steam that produces in the 30A is up finished the preheating of brewing unit 80 through hot-water line 70 and brewing unit 80, wherein the steam heat radiation is condensed into water, most condensate water is back to heat exchange unit 31 through return duct 60,31A, in the 31B, another little part condensate water flow to return duct 60 again and is back to heat exchange unit 31 through cold water pipe 43,31A, in the 31B.In addition, because being provided with restricting

element

71A, 71B, hot-water line 70 can enter the suitable temperature that maintains that the hot water amount of brewing unit 80 makes for restriction.

Constant temperature brewing mechanism of the present utility model is when holding state, heat exchanger 30, the hot water and steam of 30A through heating are toward rising, enter brewing unit 80 through hot-water line 70, through heat radiation and the formed water of the steam of condensation, can reflux by check valve 61 through return duct 60 and enter in heat exchanger 30, the 30A, finish a circulation, brewing unit 80 utilizes the reflux cycle preheating, can increase to dash the stability of boiling the drink temperature.Therefore brewing mechanism of the present utility model is used in one and dashes when boiling in the system, can rely on structure such as aforementioned to reach the purpose of stablizing preheating.

And constant temperature brewing mechanism of the present utility model is dashing when boiling state, boil magnetic valve 81 towards boiling system's startup pump 10 and dashing of described brewing unit 80, cold water can rely on pump 10 to be drawn in the pump 10 by water inlet, and be delivered to cold water pipe assembly 40 via pump 10, cold water in the outlet pipe 43 of cold water pipe assembly 40 enters return duct 60 and brewing unit 80 by the temperature adjustment pipe assembly 90 of temperature adjustment unit, the restricting element 92 of the temperature adjustment pipe assembly 90 of temperature adjustment unit, 92A, 92B, 92C, controlling suitable cold water flow enters the hot water that the hot water that flow into brewing units 80 with hot-water line 70 in the brewing unit 80 are mixed into proper temperature and boils drink to dash, the cold water of part flow into return ducts 60 and are subjected to check valve 61 control on the return duct 60 still can inflow heat exchanger 30 in the cold water pipe assembly 40,30A, and with heat exchanger 30, heated the hot water finished of 30A is pushed hot-water line 70 to and is entered in the brewing unit 80, boils drink to dash.

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, return duct 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, because the current in the check valve 61 in the return duct 60 are one and flow to A, dashing when boiling drink, the cold water that the cold water pipe assembly 40 that stimulates the menstrual flow enters in the return duct 60 flows because of check valve 61 control, and can adverse current and enter in the brewing unit 80, can make so that the water that enters brewing unit 80 all is the hot water that comes from hot-water line 70, the perhaps cold water that enters by the temperature adjustment pipe assembly 90 of temperature adjustment unit, wherein hot water flow can rely on the restricting element 71A on the hot-

water line

70,71B is further regulated, to be adjusted to optimum Preheating Temperature, 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, only there is the cold water of suitable flow can rely on the temperature adjustment pipe assembly 90 of temperature adjustment unit, 90A, 90B enters brewing unit 80, all the other most cold water all can be by return duct 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 return duct 60 and delivery heat exchanger 30 by cold water pipe fitting group 40,30A, return duct 60 relies on check valve 61 to make to have only single flow direction heat exchanger 30, the cold water of 30A, can reversely not flow in the brewing unit 80 by return duct 60, can not look like prior art yet, please refer to shown in Figure 6, hot water in its heat exchanger 120 also can enter brewing unit 170 via return duct 150, and the utility model is by the temperature adjustment pipe assembly 90 of temperature adjustment unit, 90A, the water that 90B enters in the brewing unit 80 is mainly all to be the specific cold water of controlling the size that flows out from cold water pipe fitting group 40, and do not have by heat exchanger 30, the water that 30A refluxes through return duct 60 and by the cold water of cold water pipe assembly 40 adverse currents, therefore brewing unit 80 can rely on hot-water line 70 hot-water supplies, and rely on the temperature adjustment pipe assembly 90 of temperature adjustment unit, 90A, the 90B drainage is from the cold water temperature adjustment of cold water pipe assembly 40, to obtain more stable temperature; And

Moreover, discharge that the hot-water line 70 that stimulates the menstrual flow enters brewing unit 80 and by to enter the temperature of water of brewing unit 80 all comparatively stable with the temperature adjustment pipe assembly 90 of temperature adjustment unit, return duct 60 that 90A, 90B are connected by heat exchanger 30,30A, 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 adopted formula coffee, tea product or other drinks etc.

More than explanation is just illustrative for the utility model; and nonrestrictive, those of ordinary skills understand, under the situation of the spirit and scope that do not break away from claim and limited; can make many modifications, variation or equivalence, but all will fall within the protection domain of the present utility model.

Claims

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

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

One cold water pipe assembly, it has first end that is connected with described pump, one second end and one the 3rd end;

One water-supply-pipe, the one end is connected with described pump;

One return duct, its second end with heat exchanger, cold water pipe assembly is connected, and is provided with a check valve, and wherein said check valve control stream is the flow direction of the heat exchange unit of heat exchanger on one day;

One brewing unit, it is located between described hot-water line and the return duct, join with the described hot-water line other end, the water that is used for utilizing hot-water line to flow into extracts and makes required drink, and second end of brewing unit and cold water pipe assembly is the both sides that link and be positioned at check valve respectively with return duct; And

2. constant temperature brewing mechanism according to claim 1, it is characterized in that: described temperature adjustment unit has the temperature adjustment pipe assembly of two parallel connections, each temperature adjustment pipe assembly more comprises a magnetic valve, and wherein the temperature adjustment pipe of each temperature adjustment pipe assembly the 3rd end and the return duct that are arranged on described cold water pipe assembly located between check valve and brewing unit; Restricting element is located on the corresponding temperature adjustment pipe, for regulating temperature adjustment liquid in pipe flow; Magnetic valve is located on the corresponding temperature adjustment pipe.

3. constant temperature brewing mechanism according to claim 1 is characterized in that: described hot-water line is provided with a restricting element.

4. constant temperature brewing mechanism according to claim 2 is characterized in that: the magnetic valve of each temperature adjustment pipe assembly is between restricting element and return duct.

5. according to each described constant temperature brewing mechanism in the claim 1～4, it is characterized in that: described heater is equiped with a pressure controller, with the detecting heater heating tank in a pressure and control heater unlatching or close.

6. according to each described constant temperature brewing mechanism in the claim 1～4, it is characterized in that: described heat exchanger is to have plural heat exchange unit, each heat exchange unit is to interconnect, to increase the heat exchange area between heat exchanger and the heater.

7. constant temperature brewing mechanism according to claim 5 is characterized in that: described heat exchanger is the heat exchange unit that has more than two, and each heat exchange unit is to interconnect, to increase the heat exchange area between heat exchanger and the heater.

8. constant temperature brewing mechanism according to claim 5 is characterized in that: described cold water pipe assembly has:

One water inlet pipe, it has described first end and a water side that is connected with described pump;

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

One outlet pipe, it is to have a connecting end and described second end and the 3rd end, described connecting end is connected in the water side of described water inlet pipe, and described second end and the 3rd end are to be connected with described return duct and described temperature adjustment unit respectively; And

One flowmeter, it is located on the outlet pipe, with the discharge of metering through flowmeter.

9. constant temperature brewing mechanism according to claim 6 is characterized in that: described cold water pipe assembly has:

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

One outlet pipe, it is to have a connecting end and described second and three ends, described connecting end is connected in the water side of described water inlet pipe, and described second end and the 3rd end are to be connected with described return duct and described temperature adjustment unit respectively; And

10. constant temperature brewing mechanism according to claim 7 is characterized in that: described cold water pipe assembly has:

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