WO2012171140A1

WO2012171140A1 - Beverage preparation mechanism for preventing scale sediment

Info

Publication number: WO2012171140A1
Application number: PCT/CN2011/000990
Authority: WO
Inventors: 刘宗熹
Original assignee: Liu Tsung-Hsi
Priority date: 2011-06-15
Filing date: 2011-06-15
Publication date: 2012-12-20

Abstract

A beverage preparation mechanism for preventing the scale sediment comprises a boiler (10) with an inlet valve (11) to be turned off after water intake and without any hot water or steam outlets so as to heat the water (13) stored in the boiler (10) to a predetermined temperature range in an enclosed environment, and at least one heat exchanger (20) connected with the boiler (10) in which cold water is heated indirectly by the water (13) stored in the boiler (10) and becomes hot water for preparing beverage.

Description

Beverage preparation device for preventing scale deposits

The present invention relates to a beverage preparation device, and more particularly to a beverage preparation device for preventing scale deposits. Background technique

A typical structure of a known commercial beverage preparation mechanism, as shown in Fig. 9, is mainly provided by a water supply pump 90 to supply an external water source to a boiler 91. The boiler 91 is provided with a heater 92 and a pressure detector 93. The pressure detector 93 is configured to detect the steam pressure generated in the boiler 91 and generate a control signal, and the heater 92 is controlled by a control circuit to maintain the steam pressure in the boiler 91 at 1-1. Bar between. The hot water in the lower half of the boiler 91 is output to the outside through a hot water pipe 94 and a hot water valve 96. When the hot water is used, the water level of the boiler is lowered, and the water level probe 98 detects the water level and automatically opens and closes the water supply pump 90 and The water inlet solenoid valve 99; and the steam in the upper half of the boiler 91 is output to the outside via a steam pipe 95 and a steam valve 97 for use in brewing beverages, heating beverages or making foam.

One of the greatest drawbacks encountered with the above known beverage preparation devices is the formation of scale deposits, particularly calcium carbonate, with less extended magnesium carbonate. The above scale deposits are usually formed in the boiler 91 and attached to the heater 92, but are also formed in the conveying pipe through which hot water or steam passes, and gradually block the flow of hot water or steam. The scale formed in the boiler 91 lowers the heat exchange rate like the substance forming the heat insulating layer; the scale formed in the conveying pipe causes a disadvantage that the hot water valve 96 and the steam valve 97 are blocked, and the heater 92 is fouled. Adhesion reduces heating efficiency.

Beverage operators typically use chemicals to periodically remove scale accumulated in the beverage preparation device. Descaling is not only lengthy and cumbersome, but also requires water cleaning to remove residual chemicals from the chemical used for descaling. In fact, the above-mentioned residual chemical product for descaling is difficult to completely remove and may penetrate into the beverage prepared by the beverage preparation device, which may result in poor taste and quality of the prepared beverage (the beverage may contain a syrup taste).

In addition, there are a number of manufacturers of beverage preparation devices that strive to develop a variety of different types of descaling methods and equipment, and hope to effectively solve the annoying problem of accumulated scale in the boiler 91. The descaling method used in general beverage brewing equipment is mainly based on various water source filters, and includes ultrasonic vibration and the use of permanent magnets to generate a magnetic field to reduce the shape of calcium deposits in the boiler 91; Or a magnetic descaling method or apparatus, for example, in EP-A-1378194, GB-A-2227254, US-A-4216092, US-A-2652925, Patent documents such as EP-A-1006083, EP-A-0325185, WO-A-2006/029203 and WO-A- 03/000596. However, as long as the hot water or steam in the boiler 91 flows, the surface of the boiler 91 or the hot water and steam delivery pipes that contact the hot water must constantly generate scale, so whether using chemicals, ultrasonic vibrations or magnetic fields, etc. Descaling is difficult to completely eliminate the formation and accumulation of scale. In particular, the large use of steam is like taking away pure water, accumulating scale faster, resulting in poor efficiency of the boiler 91 or even burning of the heater 92. Summary of the invention

It is an object of the present invention to provide a beverage preparation device for preventing scale deposits, in which a boiler is heated in a closed environment in which hot water or steam is not output, to a set temperature range, and at least a heat exchanger passing through the boiler, when a cold water is passed through the heat exchanger, is indirectly heated by the water stored in the boiler for the purpose of preparing a beverage, preparing a beverage, etc.; therefore, the hot water or steam inside the boiler is No flow and increase or decrease can eliminate the formation and accumulation of scale to extend the service life of the boiler and maintain the heat exchange efficiency of the boiler.

A beverage preparation apparatus for preventing scale deposits which achieves the above object of the invention includes: a boiler provided with an inlet valve which is immediately closed after completion of water inlet, and the boiler is not provided with any outlet for outputting hot water and steam , the water stored in the boiler is heated to a set temperature range in a closed environment; an overflow valve, the water inlet of the boiler reaches a set height, so that the water in the boiler is overflowed by the overflow When the valve overflows, the inlet valve and the overflow valve are closed, so that the water storage in the boiler is maintained at the set height; a temperature detector for detecting the temperature of the water in the boiler; and a heater for heating the inside of the boiler a water storage heater that heats the water stored in the boiler to the set temperature range according to a temperature value detected by the temperature detector; and at least one heat exchanger that passes through the boiler, when a cold water passes In the case of the heat exchanger, it is indirectly heated by the water stored in the boiler to become hot water for preparing the beverage.

Another embodiment of the beverage preparation device for preventing scale deposits includes: a boiler provided with a water inlet solenoid valve that is immediately closed after completion of water inlet, and the boiler is not provided with any output of hot water or steam. Exporting, so that the water stored in the boiler is heated to a set temperature range in a closed environment; a water level detector for detecting the water storage height in the boiler, which is watered into the boiler When the height is set, a control signal is generated and the water inlet solenoid valve is closed, the water inlet is stopped, and the water storage in the boiler is maintained at the set height; a pressure detector for detecting the steam pressure in the boiler; Heating the heater in the boiler, according to the steam pressure value detected by the pressure detector (for example, 1-1. 2 bar), heating the water storage in the boiler to the set temperature range; At least one heat exchanger passing through the boiler, when a cold water passes the heat When the exchanger is indirectly heated by the water stored in the boiler, it becomes a hot water for preparing a beverage.

The at least one heat exchanger includes a first heat exchanger, and the hot water indirectly heated by the first heat exchanger and stored in the boiler is sent to a first liquid through a first hot water delivery pipe. Dispenser; when a hot water solenoid valve is controlled to open, the hot water is distributed by the first liquid dispenser to a hot water outlet tube for output to the outside.

The at least one heat exchanger includes a second heat exchanger, and the hot water indirectly heated by the water stored in the boiler is sent to a second liquid through a second hot water delivery pipe. a dispenser, the second liquid dispenser is engaged with a beverage preparation container internally preset with an ingredient; when a brewing solenoid valve is controlled to be opened, the hot water is dispensed from the second liquid dispenser into the beverage preparation container And making the hot water and the food material to prepare a beverage.

The beverage preparation device further includes an exhaust valve disposed at a top end of the boiler, which maintains a normally open state to discharge residual air in the boiler before the water storage and heating in the boiler does not generate sufficient steam amount; When a sufficient amount of steam is generated in the boiler, the exhaust valve is closed by the steam flow.

The beverage preparation device further includes an exhaust valve operating device for pushing the exhaust valve to the normally open state, comprising: a fixed housing; one of being received in the housing and extending at both ends An operating lever that urges the exhaust valve; and an elastic member that is received in the housing and applies an upward elastic force to the operating lever.

Another embodiment of the exhaust valve operating device includes: an electromagnetic solenoid having a shaft that generates displacement when energized; a fixing bracket; and a lever pivoted on the fixing bracket to serve as a lever The moving operating lever has one end in contact with the shaft of the electromagnetic solenoid and the other end in contact with the exhaust valve to push the exhaust valve to the normally open state when the shaft is displaced.

The beverage preparation device for preventing scale deposits provided by the invention has no flow or increase or decrease of hot water or steam inside the boiler, and the cold water does not need to be replenished into the boiler for a long time, and the formation and accumulation of scale in the boiler can be eliminated. To extend the life of the heater and maintain the heat exchange efficiency of the boiler. DRAWINGS

Figure 1 is a perspective view of a first embodiment of a beverage preparation device for preventing scale deposits of the present invention; Figure 2 is a right side view of the beverage preparation device of Figure 1;

Figure 3 is a plan view of the beverage preparation device shown in Figure 1;

Figure 4 is a perspective view of a second embodiment of the beverage preparation device of the present invention;

Figure 5 is a perspective view of a third embodiment of the beverage preparation device of the present invention; Figure 6 is a front elevational view of the beverage preparation device of Figure 5;

Figure 7 is a partial enlarged view of the exhaust valve operating device of the beverage preparation device shown in Figure 6;

Figure 8 is a perspective view of another embodiment of the exhaust valve operating device;

Figure 9 is a perspective view of a conventional beverage preparation device.

Description of the reference signs:

10-boiler; 11-inlet valve; 12-relieving valve; 13-storage; 14-steam chamber; 15-temperature detector; 16-heater; 17-safety valve; 20-first heat exchanger 21-first cold water delivery pipe; 22-first hot water delivery pipe; 23-first liquid dispenser; 24-hot water solenoid valve; 25-hot water outlet pipe; 26-first return pipe; a flow meter; 30-second heat exchanger; 31-second cold water delivery pipe; 32-second hot water delivery pipe; 33-second liquid dispenser; 34-cooking solenoid valve; 35-beverage preparation container; 36-second return pipe; 37-second flow meter; 38-sub-pot; 39-sub-pot; 40-water supply pump; 41-cold water pipe; 42-one-way relief valve; 50-boiler; Water electromagnetic wide; 52-water level detector; 53-water supply pump; 55-pressure detector; 56-heater; 57-safety valve; 58-exhaust valve; 59-stem stem; Converter - 61 - first cold water delivery pipe; 62 - first hot water delivery pipe; 63 - first liquid dispenser; 64 - hot water solenoid valve; 65 - hot water outlet pipe; 66 - first return pipe; - second heat exchanger; 71 - second cold water delivery pipe 72-second hot water delivery pipe; 73-second liquid dispenser; 74-cooking solenoid valve; 75-beverage preparation container; 76-second return pipe; 80-exhaust valve operating device; 81-cup cup plate 82-shell; 83-operating rod; 84-elastic element; 85-exhaust valve operating device; 86-electromagnetic screw; 87-shaft; 88-fixing bracket; 89-operating lever; 90-water supply pump 91-boiler; 92-heater; 93-pressure detector; 94-hot water pipe; 95-steam pipe; 96-hot water valve; 97-steam' valve; 98-water level probe; The electromagnetic valve. detailed description

Referring to FIG. 1 to FIG. 3 together, a first embodiment of a beverage preparation device for preventing scale deposits provided by the present invention provides a closed heating system, which mainly comprises a boiler 10, such that the internal water storage 13 is closed. The environment is heated to a set temperature range of, for example, 120-123 ° C; the boiler 10 is mainly provided with a water inlet 11 and a set height relief valve 12 located on the side wall of the boiler 10, initially When the boiler 10 is used, the inlet valve 11 and the relief valve 12 can be used to replenish the external water source of the set capacity into the interior of the boiler 10; when the water is introduced, the inlet valve 11 can be simultaneously opened by manual control. The overflow valve 12 causes the external water source to flow into the interior of the boiler 10 until the water storage 13 in the boiler 10 reaches a set height, and the external water source overflows from the overflow valve 12, and then the inlet valve 11 is closed by manual control. And the relief valve 12.

The above-mentioned relief valve 12 is disposed at an appropriate vertical height of the boiler 10 (for example, about 3/4 of the height of the furnace) 4/5), the water storage 13 inside the boiler 10 accounts for about 75-80% of its volume; and the remaining volume of about 20-25% inside the boiler 10 is used as steam generated when the water storage 13 is heated. The space is accommodated, i.e., as a steam chamber 14, which is used to create a pressure in the boiler when the water is heated to have a suitable compressed space.

Since the boiler 10 does not have a hot water outlet pipe and a steam pipe, and after the water inlet is completed, the inlet valve 11 and the overflow valve 12 are both closed, so that the water storage 13 in the boiler 10 is substantially closed. The environment is heated to the set temperature range, and the water stored in the boiler 10 heated in the closed environment and the generated steam do not have any openings flowing in or out, so that no flow and increase or decrease are generated. In this case, it is possible to prevent the accumulated scale inside the boiler 10 from prolonging the service life of the heater 16, and maintaining the heat exchange efficiency of the boiler 10.

The beverage preparation device further includes a temperature detector 15 for detecting the temperature of the water stored in the boiler 10; and a heater 16 for heating the water 13 in the boiler 10. The temperature detector 15 generates a detected temperature value control signal, which is transmitted to a control unit (not shown), and the control unit controls the heater 16 to be turned on or off according to the detected temperature value control signal. The water storage 13 in the boiler 10 is heated to within the set temperature range.

The top of the boiler 10 may be provided with a safety valve 17, and when the temperature detector 15 fails to be controlled, the heater 16 continues to heat the water storage 13 in the boiler 10, causing the steam pressure in the boiler 10 to exceed a safety. When the value is set, the safety valve 17 is opened by the steam pressure to release the excessively high pressure steam to ensure that the boiler 10 is safe.

The beverage preparation device further includes a first heat exchanger 20 and a second heat exchanger 30 passing through the boiler 10, and the cold water is pumped by the first cold water delivery pipe 21 and the second cold water delivery pipe 31 by a water supply pump 40, respectively. The first heat exchanger 20 and the second heat exchanger 30 are sent into the first heat exchanger 20 and the second heat exchanger 30, and the cold water passing through the first heat exchanger 20 and the second heat exchanger 30 is indirectly heated by the water storage 13 in the boiler 10. Set the hot water in the temperature range and output it for use.

The hot water that has passed through the first heat exchanger 20 and is indirectly heated is sent to the first liquid dispenser 23 via the first hot water delivery pipe 22; when the hot water solenoid valve 24 is controlled to be turned on, the hot water The first liquid distributor 23 is distributed to the output of a hot water outlet pipe 25 for use; when the hot water solenoid valve 24 is controlled to be closed, the first heat exchanger 20 utilizes the principle of thermal circulation of the heat to the upper and the lower. The steam is flowed up to the first liquid dispenser 23, cooled to condensed water by thermal evaporation, and then returned to the first heat exchanger 20 through the first return pipe 26 to complete the preheating of the first liquid distributor 23. . The hot water outputted from the hot water outlet pipe 25 can be added to the beverage to adjust its concentration (for example, to be blended into an espresso in an espresso) or for other uses. Similarly, the hot water that has passed through the second heat exchanger 30 and is indirectly heated is sent to the second liquid dispenser 33 via the second hot water delivery pipe 32, and the second liquid dispenser 33 is joined with an internal preset material. Beverage preparation container 35; when a brewing solenoid valve 34 is controlled to be opened, hot water is delivered from the second liquid dispenser 33 to the beverage preparation container 35, so that the hot water and the food material act to prepare a beverage; When the solenoid valve 34 is controlled to be closed, the second heat exchanger 30 uses the principle of thermal circulation of the heat to the upper and lower sides to flow the steam upward to the second liquid distributor 33, and then cools to condensed water by thermal evaporation. The second return pipe 36 flows back into the second heat exchanger 30 to complete the preheating of the second liquid distributor 33.

A first flow meter 27 for calculating a flow rate is disposed on the first cold water delivery pipe 21; a second flow meter 37 for calculating a flow rate is disposed on the second cold water delivery pipe 31; and the water supply pump 40 is supplied to the water supply pump 40 The cold water pipe 41 of the first cold water delivery pipe 21 and the second cold water delivery pipe 31 is provided with a one-way relief valve 42 for preventing reverse flow of hot water and having an automatic pressure relief when the set pressure value is exceeded.

Referring to FIG. 4, a second embodiment of the beverage preparation device of the present invention is different from the first embodiment described above, and the second heat exchanger 30 is changed from a single-pot heat exchanger to a double-pot heat. The exchanger, that is, the second heat exchanger 30 is composed of two sub-pots 38, 39 which communicate with each other and respectively pass through the boiler 10, and can increase the heat exchange area and heat of the cold water and the water storage 13 in the boiler 10. Exchange time to improve heat exchange efficiency.

Referring to FIG. 5 to FIG. 7 simultaneously, the third embodiment of the beverage preparation device for preventing scale deposits provided by the present invention mainly comprises a boiler 50 for heating the internal ice storage to a temperature of, for example, 120- in a closed environment. The set temperature range of 123 ° C; the boiler 50 is mainly provided with a water inlet solenoid valve 51, and a water level detector 52 for detecting the water storage height in the boiler 50. When the boiler 50 is used for the first time, The water inlet solenoid valve 51 and the water level detector 52 can be used to replenish the external water source of the set capacity into the interior of the boiler 50; when the water is fed, the water supply pump 53 and the water inlet solenoid valve 51 are controlled to be turned on by the control unit. And starting to send the external water source into the interior of the boiler 50, until the water level detector 52 detects that the water in the boiler 50 reaches a set height, generates a control signal, transmits the control signal to the control unit, and the control unit is The water supply pump 53 and the water inlet solenoid valve 51 are controlled to be closed, and the water inlet is stopped to maintain the water stored in the boiler 50 at the set height. .

Since the boiler 50 is not provided with a hot water outlet pipe and a steam pipe, and after the water inlet is completed, the water inlet solenoid valve 51 is closed, so that the water stored in the boiler 50 is substantially heated to a closed environment. Within the set temperature range, the water stored in the boiler 50 heated in the enclosed environment and the steam and hot water generated do not have any openings flowing in or out, so that no flow or increase or decrease occurs. The accumulation of scale inside the boiler 50 can be prevented to extend the service life of the heater 56 and maintain the heat exchange efficiency of the boiler 50. The beverage preparation device further includes a pressure detector 55 for detecting the vapor pressure generated by the water stored in the boiler 50; and a heater 56 for heating the water stored in the boiler 50. The pressure detector 55 generates a detected pressure value control signal, which is transmitted to the control unit, and the control unit controls the heater 56 to be turned on or off according to the detected pressure value control signal to the inside of the boiler 50. The steam pressure is maintained between, for example, a set steam pressure value between 1-1.2 bar, even if the water storage temperature in the boiler 50 is maintained within a set temperature range of, for example, 120-123 °C.

The beverage preparation device further includes a first heat exchanger 60 and a second heat exchanger 70 passing through the boiler 50, and the cold water is pumped by the first cold water delivery pipe 61 and the second cold water delivery pipe 71 by the water supply pump 53 respectively. The first heat exchanger 60 and the second heat exchanger 70 are sent into the first heat exchanger 60 and the second heat exchanger 70, and the water stored in the boiler 50 is indirectly heated by the cold water passing through the first heat exchanger 60 and the second heat exchanger 70. Hot water in a fixed temperature range and output to the outside for use.

The hot water that has passed through the first heat exchanger 60 and is indirectly heated is sent to the first liquid dispenser 63 via the first hot water delivery pipe 62; when the hot water solenoid valve 64 is controlled to be turned on, the hot water The first liquid distributor 63 is distributed to a hot water outlet pipe 65 for use; when the hot water solenoid valve 64 is controlled to be closed, the first heat exchanger 60 utilizes the principle of thermal circulation of the heat to the upper and the lower And flowing the steam upward to the first liquid dispenser 63, and after cooling to the condensed water by thermal evaporation, the first return pipe 66 flows back into the first heat exchanger 60 to complete the first liquid distributor 63. Preheating. The hot water outputted from the hot water outlet pipe 65 can be added to the beverage to adjust its concentration (e.g., blended into an espresso coffee to be blended into an American espresso coffee) or other uses.

Similarly, the hot water that has passed through the second heat exchanger 70 and is indirectly heated is sent to the second liquid dispenser 73 via the second hot water delivery pipe 72, and the second liquid dispenser 73 is coupled with an internal preset material. a beverage preparation container 75; when a brewing solenoid valve 74 is controlled to be opened, hot water is delivered from the second liquid dispenser 73 to the beverage preparation container 75, so that the hot water and the food material act to prepare a beverage; When the solenoid valve 74 is controlled to be closed, the second heat exchanger 70 uses the principle of thermal circulation of the heat to the upper and lower sides to flow the steam upward to the second liquid distributor 73, and after cooling to condensed water by thermal evaporation, The second return pipe 76 flows back into the second heat exchanger 70 to complete the preheating of the second liquid distributor 73.

The top of the boiler 50 may be provided with a safety valve 57. When the heater 56 fails to be controlled and continues to heat the stored water in the boiler 50, causing the steam pressure in the boiler 50 to exceed a safe set value, The steam pressure pushes the safety valve 57 open to release the excessively high pressure steam to ensure that the boiler 50 is safe.

In the third embodiment, the pressure detector 55 is used to detect the steam pressure in the boiler 50 to control the addition. The heater 56 heats the water stored in the boiler 50 to the set temperature range. Therefore, an exhaust valve 58 is further disposed at the top of the boiler 50, and the water stored in the boiler 50 is heated to generate sufficient steam. Before, the air remaining in the steam chamber 14 in the boiler 50 is discharged; until the water stored in the boiler 50 is heated to a sufficient amount of steam, the steam flow of the steam is used to push the valve stem 59 of the exhaust valve 58 to close the exhaust valve 58, The boiler steam chamber 14 generates a steam pressure. Generally, the steam pressure of the espresso machine is about 1-2 bar. When the pressure detector detects that the vapor pressure is higher than 1.2 bar, the heater 56 is turned off; the detected vapor pressure is lower than At 1 bar, the heater 56 is activated.

In actual use, the exhaust valve 58 occasionally has a failure condition of failure to be stuck, so that it cannot be kept in an open state before the water storage in the boiler 50 is heated and does not generate sufficient vaporization amount; therefore, the present invention is further provided with an exhaust gas. The valve operating device 80 is constructed as shown in FIGS. 6 and 7. The exhaust valve operating device 80 includes a housing 82 that is fixed to a cup tray 81 or other suitable position of the beverage preparation device. An operating rod 83, which is disposed in the housing 82 and has both ends extending out of the housing 82, and an elastic member 84 received in the housing 82 and applying an upward elastic force to the operating rod 83; The operating lever 83 is positioned directly above the valve stem 59 of the exhaust valve 58 and does not interfere with the displacement of the exhaust valve 58 to the closed position. Before the beverage preparation device is turned on, the user can manually press the operation lever 83 at least once to manually push the valve stem 59 downward, so that the valve stem 59 is indeed displaced downward to the exhaust valve 58. In the position of the state, the pressure detector 55 may be prevented from being unopened due to the failure of the exhaust valve 58, so that the air in the steam chamber 14 is not discharged, causing the pressure of the steam chamber 14 to be air pressure instead of steam pressure, generating pressure. The detector 55 falsely reports the steam pressure detection value.

Referring to FIG. 8, the manually operated exhaust valve operating device may also be a more electrically operated exhaust valve operating device 85 including an electromagnetic solenoid 86 fixed to the beverage preparation device, having a a shaft 87 that generates a displacement when energized; a fixing bracket 88 that is fixed to the beverage preparation device; and an operating lever 89 that is pivotally mounted on the fixing bracket 88 to perform a lever movement, one end of which is The shaft 87 of the electromagnetic solenoid 86 is in contact with the other end in contact with the valve stem 59 of the exhaust valve 58 to urge the valve stem 59 to move as the shaft 87 is displaced. When the beverage preparation device is initially turned on, the control unit outputs a control signal to cause the electromagnetic solenoid 86 to be energized to act once, and pushes the operation lever 89 to perform a lever movement to push the valve stem of the exhaust valve 58. The 59 is indeed displaced downward to a position where the exhaust valve 58 is in an open state, and then the power of the electromagnetic solenoid 86 is cut off.

The beverage preparation device for preventing scale deposit provided by the invention, after completing the water inlet, the boiler heats the stored water in the boiler to a set temperature range and sets in the closed environment without any inlet and outlet. At least one heat exchanger passing through the boiler, when a cold water passes through the heat exchanger, is indirectly heated by the water stored in the boiler for use in preparing a beverage, blending a beverage, etc.; therefore, hot water or steaming inside the boiler There is no flow or increase or decrease in the steam. Not only does it need to replenish cold water into the boiler for a long time, but also eliminates the formation and accumulation of scale in the boiler to prolong the service life of the heater and maintain the heat exchange efficiency of the boiler.

The above description of the present invention is intended to be illustrative, and not restrictive, Within the scope of protection of the present invention.

Claims

Rights request

A beverage preparation device for preventing scale deposits, comprising:

a boiler, which is provided with an inlet valve that is closed immediately after the completion of the water inlet, and the boiler is not provided with any outlet for outputting hot water and steam, so that the water stored in the boiler is heated to a closed environment. Within a fixed temperature range;

An overflow valve is disposed at a set height on a side wall of the boiler, and the overflow valve closes the water inlet when the boiler water enters a set height, so that the water in the boiler overflows from the overflow valve a valve and a relief valve to maintain the stored water in the boiler at the set height;

a temperature detector for detecting the temperature of the water stored in the boiler;

a heater for heating the water in the boiler, wherein the water stored in the boiler is heated to the set temperature range according to the temperature value detected by the temperature detector;

At least one heat exchanger passing through the boiler, when a cold water passes through the heat exchanger, is indirectly heated by the water stored in the boiler to become hot water for preparing the beverage.

2. The scale deposit preventing beverage preparation apparatus according to claim 1, wherein the at least one heat exchanger comprises a first heat exchanger, and the first heat exchanger is passed through and stored in the boiler The indirectly heated hot water is delivered to a first liquid dispenser via a first hot water delivery pipe; when a hot water solenoid valve is controlled to be opened, the hot water is delivered to the heat by the first liquid dispenser The water outlet tube is output to the outside for use.

3. The scale preventing beverage preparation apparatus according to claim 1, wherein the at least one heat exchanger comprises a second heat exchanger, and the second heat exchanger is passed through and stored in the boiler The indirectly heated hot water is delivered to a second liquid dispenser via a second hot water delivery pipe, the second liquid dispenser is coupled to a beverage preparation container having an internal preset of an ingredient; when a brewing solenoid valve is controlled When it is opened, the hot water is delivered to the beverage preparation container by the second liquid dispenser, and the hot water is reacted with the food material to prepare a beverage.

A beverage preparation device for preventing scale deposits, comprising:

a boiler, which is provided with a water inlet solenoid valve that is closed immediately after the completion of the water inlet, and the boiler is not provided with any outlet for outputting hot water and steam, so that the water stored in the boiler is heated to a closed environment. Within the set temperature range;

a water level detector for detecting the water storage height in the boiler, when the boiler water reaches a set height, generates a control signal and closes the water inlet solenoid valve to stop the water inlet, so that the water is inside the boiler The water storage is maintained at the set height; a pressure detector for detecting the pressure of the steam in the boiler;

a heater for heating the water in the boiler, according to the steam pressure value detected by the pressure detector, heating the water stored in the boiler to the set temperature range;

The scale preventing beverage-preparing device according to claim 4, wherein the at least one heat exchanger comprises a first heat exchanger, and the first heat exchanger is passed through and stored in the boiler The indirectly heated hot water is delivered to a first liquid dispenser via a first hot water delivery pipe; when a hot water solenoid valve is controlled to be opened, the hot water is delivered to the heat by the first liquid dispenser The water outlet tube is output to the outside for use.

The beverage preparation device for preventing scale deposit according to claim 4, wherein the at least one heat exchanger comprises a second heat exchanger, and the second heat exchanger is passed through and stored in the boiler The indirectly heated hot water is delivered to a second liquid dispenser via a second hot water delivery pipe, the second liquid dispenser is coupled to a beverage preparation container having an internal preset of an ingredient; when a brewing solenoid valve is controlled When it is opened, the hot water is delivered to the beverage preparation container by the second liquid dispenser, and the hot water is reacted with the food material to prepare a beverage.

The beverage preparation device for preventing scale deposit according to claim 4, further comprising an exhaust valve disposed at a top end of the boiler, wherein the water storage in the boiler does not generate a sufficient amount of steam before the boiler Maintaining a normally open state to discharge residual air in the boiler; and when the steam is generated in the boiler, the exhaust valve is closed by the steam flow.

The beverage preparation device for preventing scale deposit according to claim 7, further comprising an exhaust valve operating device for pushing the exhaust valve to the normally open state, comprising: a fixed shell An operating rod received in the housing and extending at both ends to push the exhaust valve; and an elastic member received in the housing and applying an upward elastic force to the operating rod.

9. The scale preventing beverage preparation apparatus according to claim 7, further comprising an exhaust valve operating device for pushing the exhaust valve to the normally open state, comprising: an electromagnetic screw a tube having a shaft that is displaced when energized; a fixing bracket; and an operating lever pivotally mounted on the fixing bracket for a lever movement, one end of which is in contact with the shaft of the electromagnetic solenoid, The other end is in contact with the exhaust valve to push the exhaust valve to the normally open state when the shaft is displaced.