TWI544887B - A device for formulating of hong kong style milk tea - Google Patents

Description

Hong Kong-style milk tea making equipment

The present invention relates to a device for making milk tea, and more particularly to a Hong Kong-style milk tea making device capable of automatically producing Hong Kong-style cold milk tea or frozen milk tea.

Milk tea is popular with people for its unique taste. Whether it is hot milk tea or frozen milk tea, the sales volume is very huge. Milk tea is produced in a variety of tea restaurants and a variety of chain fast food restaurants, and these restaurants use large-capacity tea machines when making milk tea. The most common is the production of milk tea from coffee machines imported from the United States. Whether or not you can make good milk tea depends on the process of making tea. The coffee machine is made in a straight-through mode of operation. The boiled water passes through a container with coffee powder and then flows directly into the insulated tub to make the tea. Under such circumstances, the coffee machine does not have the function of hitting tea when making milk tea, not to mention the function of tea.

In order to improve the shortcomings of using the coffee machine to directly make milk tea, some improvements have been made. For example, Chinese Patent No. ZL200920216386.4 discloses a Hong Kong-style hot milk tea making apparatus, which comprises a casing, a controller disposed in the casing, and characterized in that: further comprising a Hong Kong-style built in the casing a hot tea mixing device, a conveying device, a water supply device and an output device for milk tea, wherein the hot tea mixing device comprises a first water tank with a filter bag containing tea powder; the water supply device comprises a second water tank and heating And a water supply device for directly spraying hot water in the second water tank into the first water tank, wherein the second water tank is connected to an external water supply system via an input control valve, and the heating device is disposed at the The inner bottom of the second water tank; at the same time, the first water tank is in communication with the output device and the water supply device via the conveying device. The technical solution of the patent uses 4 vessels for the treatment of tea, but the tea flows only in the first tank, the second tank and the two buffer tanks, the heat is lost, the temperature of the tea is constantly changing, and cannot be constant. Tea treatment at temperature is essentially focused on filtering tea.

Therefore, it is necessary to improve the existing technology to make a milk tea device capable of thermostating tea and equipped with automatic heating of evaporated milk, which can not only produce a tea with good taste. Water can also heat the evaporated milk to create automated equipment for making hot milk tea and frozen milk tea. Not only does it require power saving, energy saving, but also labor and expense savings.

The main object of the present invention is to provide an apparatus for automatically preparing milk tea, which is capable of performing tea and tea-impacting operations under constant temperature conditions to obtain tea of high quality taste.

Another object of the present invention is an apparatus for automatically preparing milk tea, which can automatically heat the evaporated milk and sterilize the evaporated milk to ensure the hygiene of the finished milk tea.

Another object of the present invention is to provide an apparatus for automatically preparing milk tea which can not only prepare hot milk tea but also automatically produce frozen milk tea.

Still another object of the present invention is to provide an apparatus for automatically preparing milk tea which is not only easy to handle, but also has the advantages of energy saving, high efficiency, labor saving and cost.

In order to achieve the above object, the present invention is configured to include a housing and a control unit disposed in the housing, wherein the Hong Kong-style milk tea making apparatus further includes: a tea making unit, including: a first water tank, Provided in the casing for placing a tea bag for thermostatically conducting tea in the first water tank; the second water tank is disposed in the casing, and the second water tank is provided with a heating device to The water in the second water tank is heated to a predetermined temperature; the first circulating pipeline system is disposed in the casing, connected to the external water outlet, and is respectively connected to the first water tank and the second water tank through a control valve; a temperature detecting device, disposed in the first water tank and the second water tank, electrically connected to the control unit for detecting water temperature of the first water tank and the second water tank, and the control unit and the first a circulation line cooperates to maintain the temperature of the water in the first tank and the second tank within a predetermined range; and a milk making unit comprising: a container disposed on the casing for containing milk for making milk tea Heating system to treat said The milk is heated to a predetermined temperature.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the heating system includes a second circulation piping system that communicates with the container, and the second circulation piping system portion The second tank is placed in the second tank to heat the fresh milk to a predetermined temperature in the second circulation piping system.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the heating means is a wave-shaped electric heating wire provided in the second water tank.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the two sides of the first water tank are wave-shaped to increase the area of heat transfer.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the tea bag has a volume of 50% to 70% of the volume of the first tank. Preferably, the tea bag has a size of 60% of the first water tank.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the bottom of the tea bag is 10-20 mm from the bottom of the first water tank. Preferably, the bottom of the tea bag is 15 mm from the bottom of the first tank.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the first circulation line system and the second circulation line system include a water pumping device.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the circulation line of the milk making unit is wave-shaped.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the temperature detecting means is a temperature sensor.

According to an embodiment of the Hong Kong-style milk tea making device of the present invention, the first water tank and the second water tank are provided with a water level detecting device to detect whether the water level in the first water tank and the second water tank reaches a preset. the height of.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the water level detecting device water level sensor.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the first water tank and the lower side of the second water tank are provided with a first heat insulating cylinder connected to the first circulation piping system.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the Hong Kong-style milk tea making apparatus further includes a third water tank that communicates with the first pipeline circulation piping system to communicate the first Water tank and second water tank.

An embodiment of a Hong Kong-style milk tea making apparatus according to the present invention, said Hong Kong style The milk tea making apparatus further includes a refrigerating and freezing device disposed in the casing and connected to the external water of the first circulation piping system to freeze the tea through the control valve.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the Hong Kong-style milk tea making apparatus further includes a second heat insulating cylinder connected to the first circulation piping system and manufactured by a control valve. Hot tea is injected into the second holding tank.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the Hong Kong-style milk tea making apparatus further includes a heat collecting device for absorbing heat released by the freezing and cooling device to cool the hot tea, and the heat collecting The device is in communication with the first circulation line system such that water flowing through the first circulation line system absorbs heat from the heat collection device and flows into the third via the control unit and the first circulation line system Water tank.

According to an embodiment of the Hong Kong-style milk tea making device of the present invention, the third water tank is provided with a temperature sensor and an indicator light. When the temperature sensor senses that the water in the third water tank reaches a predetermined temperature, The indicator light is on.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the first circulation piping system includes a circular spray head to flow water into the first water tank in a sprayed form.

According to an embodiment of the Hong Kong-style milk tea making apparatus of the present invention, the temperature of the first tank is kept constant at 90-95 ° C, and the temperature of the second tank is maintained at 92-98 ° C.

The Hong Kong-style milk tea making device of the invention adopts the cooperation of the automatic control unit and the temperature sensor, so that the water temperature of the first water tank can be kept constant, that is, in the case of the temperature difference caused by the barrier of the tea bag, the first detection can be automatically detected. The temperature of the tea in the water tank, and start the first circulation pipeline system and cooperate with the control unit and the control valve to extract the tea in the first water tank and spray it on the tea bag. In the case where the temperature of the second tank is constant, the constant water circulation of the first circulation piping system ensures the constant temperature of the water in the first tank to achieve a true constant temperature "tea" and "tea hit" function.

The Hong Kong-style milk tea making device of the invention is further equipped with a milk source heating unit, which cooperates with the control valve and the control unit through the principle of heat transfer, so that the evaporated milk flows in the pipeline system and is heated by the heat transfer of the second water tank. The effect is to achieve the purpose of sterilization and disinfection, so that the prepared milk tea is hygienic and clean, and meets the hygiene standards of various countries and regions.

The Hong Kong-style milk tea making device of the invention is also equipped with a part for preparing frozen milk tea, and the hot tea is frozen by the freezing and cooling device, and the heat released by the cooling of the tea is searched by the heat source. The collecting device absorbs and then uses circulating water to cool the device. The entire refrigeration device is highly efficient, and the released heat is repeatedly absorbed and utilized by the water, so that the water temperature input to the second water tank is higher than the normal temperature tap water, so that the heating time of the water in the second water tank is greatly shortened, and the province is effectively saved. The purpose of electricity, energy saving and efficiency.

The prepared hot tea and cold tea are stored in the set incubator, which is convenient for people to use.

The entire equipment can save a lot of power, and realize the automatic production of hot and cold milk tea, which saves labor costs to the greatest extent.

100‧‧‧Hong Kong-style milk tea making equipment

110‧‧‧shell

120‧‧‧Control unit

130‧‧‧First water tank

140‧‧‧Second water tank

131‧‧‧ wavy wall

150‧‧‧ Tea bags

160‧‧‧heating line

180‧‧‧First circulation piping system

181‧‧‧ pumping device

170‧‧‧Water outlet

200‧‧‧temperature sensor

220‧‧‧Water level sensor

240‧‧‧heating cylinder

190‧‧‧ Container

210‧‧‧Second circulation piping system

211‧‧‧ pumping device

230‧‧‧ switch

260‧‧‧Frozen refrigeration unit

270‧‧‧ third water tank

271‧‧‧temperature sensor

261‧‧‧Evaporator

280‧‧‧Second holding tank

250,272,273‧‧" switch

In order to enable the reviewing committee to better understand the techniques, means, and effects of the present invention in order to achieve the intended purpose, the preferred embodiments of the present invention will be described in detail with reference to the drawings. And the advantages, when you can get a deep and specific understanding.

Figure 1 is a schematic view of the structure of the present invention.

Figure 2 is a schematic view of the structure of the present invention. (where the device is equipped with a part for preparing frozen milk tea)

The invention will be described in detail below with reference to specific embodiments. The illustrative embodiments and the description of the present invention are intended to be illustrative only and not to limit the invention.

In the present invention, the term "焗茶" means that the tea or tea bag is soaked in tea water at a constant high temperature for a period of time, usually 30-45 minutes.

As shown in Fig. 1, according to an aspect of the present invention, the present invention provides a Hong Kong-style milk tea making apparatus 100 for making hot milk tea, which mainly comprises a tea making unit and a milk making unit.

The tea making unit comprises a housing 110 and a control unit 120. The housing 110 is made of metal, such as a housing made of stainless steel, and the control unit 120 is disposed in the housing for controlling the entire device. The milk making unit includes a container for holding milk for making milk tea and a heating system to heat the milk in the container to a predetermined temperature.

The Hong Kong-style milk tea making apparatus 100 includes a first water tank 130 and a second water tank 140. A wavy wall 131 is disposed between the first water tank 130 and the second water tank 140 to increase the heating surface. Accumulate and reduce heat loss. The tea tank 150 is disposed in the first water tank 130, and has a funnel shape as a whole to facilitate the soaking of the tea leaves. The bottom of the tea bag 150 is about 10-20 cm away from the bottom of the first water tank 130, for example, may be set to a distance of 15 cm, and the volume of the tea bag 150 is 50%-70% of the volume of the first water tank 130, for example, It is 60% or 65%. The purpose is to allow the tea bag 150 to be sufficiently immersed up and down.

A heating wire 160 is disposed in the second water tank 140 to boil water in the second water tank 140. Preferably, the heating wire 160 is spiraled and electrically heated to increase the heat receiving area and is more efficient.

The number of the heating wires 160 is set according to the size of the second water tank 140, and for example, the heating wires 160 may be set to six or eight spirals.

The Hong Kong-style milk tea making apparatus 100 includes a first circulation line system 180 including a line (arrows in the figure indicate the flow of water in the line) and a pumping device 181, and the pumping unit 181 employs a pump. The circulation line system 180 communicates the first water tank 130 and the second water tank 140 so that water can circulate. The end of the first circulation line system 180 includes a circular water outlet 170 to uniformly spray hot water onto the tea bag 150 of the first water tank 130. When the water temperature of the second tank 140 reaches 98 ° C, the first circulation line system 180 injects water into the first tank 130 to start tea.

A water temperature detecting device and a water level detecting device are disposed in the first water tank 130 and the second water tank 140. Preferably, the water temperature detecting device and the water level detecting device are a temperature sensor 200 and a water level sensor, respectively. 220, for detecting the temperature of the water temperature and water in the first water tank 130 and the second water tank 140, and determining whether the current water temperature reaches a preset temperature, and whether the water level reaches a predetermined height, which are controlled by the control unit. . The temperature sensor may be provided in plurality, for example, three or four, to more accurately detect the temperature of the tea. In one embodiment, two temperature sensors are provided in the first tank, respectively located near the bottom and top positions of the tea bag 150.

Specifically, the first circulation pipeline system 180 is connected to an external water source, and water is introduced into the second water tank 140. The water level sensor senses the water level to a preset position, stops adding water, and turns on the heating line. 160, boil the water (generally maintained at a water temperature of 92-98 ° C), and the control unit controls the first circulation line system 180 to inject boiling water into the first water tank 130 through the water outlet 170.

In one embodiment, because the temperature of the tea water in the first water tank 130 and the temperature of the tea water in the tea bag 150 have a temperature difference, when the temperature sensor 200 senses that the temperature is not within the preset range, The control unit activates the first circulation line system 180, extracts the tea with a high temperature at the bottom of the first water tank 130, and then returns to the tea bag 150 through the first circulation line system 180 to push the concentrated tea out of the tea bag. The above process is continuously repeated to neutralize the temperature difference between the upper and lower sides of the first tank 130 and the concentration of the tea.

In one embodiment, 95 ° C water is injected into the first water tank 130 to soak the tea bag 150, after which the water temperature in the first water tank 130 becomes about 88-92 ° C, when a temperature difference is detected. When the control unit is activated, the tea is pumped away, the tea bag is injected, and the cycle is repeated a plurality of times, and the temperature of the water in the first water tank 130 is constant at about 90-95 ° C (the heat of the second water tank 140 passes through the undulating wall 131). It is transferred to the first water tank 130 and maintained at about 90-95 ° C). The tea in the first water tank 130 is repeatedly taken out periodically and re-injected into the first water tank 130 through the control valve and the first circulation piping system 180, and the whole process is about 30-45 minutes to complete the constant temperature "焗The process of tea and "crashing tea".

Preferably, a heat preservation cylinder 240 is disposed in the casing 110, and the tea water passing through the constant temperature tea process passes through the first circulation pipeline system 180 and flows into the heat preservation cylinder 240 for use.

Preferably, the heat preservation cylinder 240 is provided with insulation cotton to make the heat preservation effect more effective.

The Hong Kong-style milk tea making apparatus 100 further includes a container 190 for containing liquid milk, such as light milk. The container 190 is provided on one side of the second water tank 140, and is fixed to one side of the second water tank 140, for example, by a side hanging. The container 190 is provided with a second circulation line system 210 associated therewith, which includes a line and a pumping device 211, such as a pump. The pipeline of the second circulation piping system 210 is curvedly disposed in the second water tank 140. After the fresh milk is loaded into the container 190, the pumping device 211 draws the milk out, flows in the circulation line, controls the flow rate, and appropriately sets the length of the line in the second tank 140, which can be The milk is heated and/or boiled to safely sterilize the evaporated milk to reduce the health problems caused by unsanitary or contaminated milk, effectively avoiding the human body damage caused by directly adding the milk.

When it is necessary to make hot milk tea, it is only necessary to open the switches 250 and 210 to mix the hot tea and the hot milk, respectively, to make a hot milk tea with good taste and taste.

As shown in Fig. 2, the Hong Kong-style milk tea making apparatus 100 further includes a portion for making frozen milk tea. Preferably, the housing 110 of the Hong Kong-style milk tea making device 100 is provided with a refrigerating and cooling device 260. The refrigerating and cooling device 260 includes a heat collecting device (not shown) for absorbing the cooling device. The heat released by hot tea. The refrigerating and cooling device 260 and the external water source and the first The circulation line 180 is in communication. When the tea passing through the tea-teating process passes through the freezing and cooling device 260, the temperature of the tea is rapidly lowered, and the heat collecting device absorbs the heat released by the cooling of the hot tea, and the external cold water is taken away by the heat collecting device to remove the heat released by the cooling of the hot tea. At the same time, the cold water is heated to a certain temperature.

The chilled and refrigerating device 260 has a structure common to the field of refrigeration, and can rapidly cool the hot tea. For example, the refrigerating and cooling device 260 includes a condenser, an evaporator, and the like.

Preferably, a third water tank 270 is disposed on one side of the housing 110, and a temperature sensor 271 and a water level sensor (not shown) are disposed therein for collecting the heat. Collection of hot water after the installation.

The third water tank 270 communicates with the second water tank 140, that is, the hot water in the heated third water tank 270 can be injected into the second water tank 140 through the control valve, and then heated to significantly reduce the electric energy. Very environmentally friendly and energy efficient.

Wherein the temperature sensor 271 detects that the water temperature of the third water tank 270 is within a predetermined range, for example, 70 ° C, the first circulation piping system 180 is activated to inject water into the second water tank 140. When the water level sensor detects that the water level has reached the predetermined water level, the injection of hot water is stopped, or the hot water is discharged through the switch 272.

Preferably, an indicator light may be disposed on the casing of the third water tank 270. When the temperature sensor 271 detects that the water temperature reaches a preset temperature, for example, 50 ° C or 70 ° C, the indicator light is illuminated to remind effect. At this time, it is necessary to discharge the hot water to improve the effect of water cooling.

Preferably, in one embodiment, the housing 110 of the Hong Kong-style milk tea making apparatus 100 is further provided with a second holding cylinder 280 communicating with the first circulating piping system 180 to pass the control valve and The control unit injects tea into the second holding cylinder 280.

The second heat preservation cylinder 280 is provided with heat insulating cotton to maintain the temperature of the tea water for a long time.

Specifically, the tap water is externally connected to the pipeline of the condenser of the refrigerating and cooling device 260 to be used for water cooling and cooling, and then the tap water is used to assist the cooling by the condenser, instead of using a commonly used fan or aluminum sheet to cool down. The tap water after the heat exchange is injected into the third water tank 270 so that the temperature of the water is above 50 ° C, and the entire system is energy-saving and environmentally friendly.

The evaporator 261 of the refrigerating and cooling device 260 is installed at the bottom of the second holding cylinder 280.

At this time, the flow direction of the entire first and second circulation systems is: 1. Injecting the tap water externally injected into the refrigeration and refrigeration device 260 to start the refrigeration cycle; 2. The hot water after the heat exchange is injected into the third water tank 270; 3. The third water tank 270 is drawn into the second water tank 140 to specify the water level and then heated; 4. After that, the third water tank 270 stops the water injection; 5. The second water tank 140 The water temperature is heated to a specified temperature (for example, 98 ° C); 6. The second water tank 140 starts to inject water to the designated water level of the first water tank 130 to hit tea and tea; 7. because the water level of the second water tank 140 drops, the third water tank 270 pumps water. The second water tank 140 is designated to fill the water level; 8. When the water level of each water tank reaches the designated position, the tap water is stopped from being injected into the refrigeration and refrigeration unit 260; 9. The third water tank 270 is pumped back into the refrigeration and refrigeration unit 260 for cooling until the third water tank 270 The temperature reaches the preset temperature, such as 60 ° C; when the light prompts to remove the hot water, the third water tank 270 water level drops; 10, start the control unit, re-inject the tap water into the refrigeration and refrigeration device 260, so that the cooling effect is better Effect.

When you need to make frozen milk tea, you only need to take the frozen tea from the switch 273, add the milk, you don't need to add ice, the frozen milk tea is clean and taste good.

The Hong Kong-style milk tea making apparatus of the present invention fully utilizes the principle of water circulation, and greatly reduces the use of electric energy. The Hong Kong-style milk tea making equipment can produce hot milk tea in an integrated way, and can also prepare frozen milk tea to fully meet the needs of different groups of people. Moreover, the heated or boiled milk is clean and hygienic, and solves the physical damage caused by the expired milk or bacteria.

The technical solutions of the present invention have been described in detail above, and the principles and embodiments of the embodiments of the present invention are described herein by using specific examples. The descriptions of the above embodiments are only applicable to the understanding of the principles of the embodiments of the present invention. At the same time, there will be changes in the specific embodiments and application scopes according to the embodiments of the present invention. In summary, the content of the specification should not be construed as limiting the invention.

In view of the structure described above, the present invention utilizes a relatively improved technique, so that it can provide a good usability and is a completely different mechanism.

The above description of the preferred embodiments of the present invention is not intended to limit the scope of the present invention, and the scope of the invention should be limited to the following claims. And the approximate structure should be included in the present invention.

100‧‧‧Hong Kong-style milk tea making equipment

110‧‧‧shell

120‧‧‧Control unit

130‧‧‧First water tank

140‧‧‧Second water tank

131‧‧‧ wavy wall

150‧‧‧ Tea bags

160‧‧‧heating line

180‧‧‧First circulation piping system

181‧‧‧ pumping device

170‧‧‧Water outlet

200‧‧‧temperature sensor

220‧‧‧Water level sensor

240‧‧‧heating cylinder

190‧‧‧ Container

210‧‧‧Second circulation piping system

230,250‧‧‧ switch

Claims (8)

A Hong Kong-style milk tea making device comprising a casing and a control unit disposed in the casing, further comprising: a tea making unit comprising: a first water tank disposed in the casing for placing the tea bag, The tea is thermostatically carried in the first water tank; a tea bag is placed in the first water tank, the volume of the tea bag is 50%-70% of the volume of the first water tank; a tea bag is placed in the first water tank, and the bottom of the tea bag is placed 10-20mm from the bottom of the first water tank; a second water tank is disposed in the casing, and a heating device is arranged in the second water tank to heat the water in the second water tank to a predetermined temperature; the heating device is located in the second a wavy electric heating wire in the water tank; a first circulation pipeline system, disposed in the casing, connected to an external water outlet, and connected to the first water tank and the second water tank through a control valve; the first circulation pipe The road system includes a spray head for flowing hot water into the first water tank in a spray form; a first heat preservation cylinder is disposed in the casing, and is in communication with the first circulation pipeline system; the first circulation pipeline system and the second circulation pipeline The system includes a pumping device a temperature detecting device is disposed in the first water tank and the second water tank, and is electrically connected with the control unit to detect the water temperature of the first water tank and the second water tank, and cooperates with the control unit and the first circulation pipeline system In order to keep the temperature of the water in the first tank and the second tank within a predetermined range; the temperature detecting device is a temperature sensor; and a water level detecting device is arranged in each of the first tank and the second tank to detect the first tank And whether the water level in the second water tank reaches a preset height; the water level detecting device is a water level sensor; and a milk making unit comprising: a container disposed on the casing for containing milk for making milk tea; a heating system for heating the milk in the container to a predetermined temperature; comprising a second circulation piping system penetrating the container, and the second circulation piping system is partially placed in the second water tank to dilute the milk in the second cycle The piping system is heated to a predetermined temperature; it is connected to an external outlet. The Hong Kong-style milk tea making apparatus according to claim 1, wherein the two sides of the first water tank are wave-shaped to increase the area of heat transfer. The Hong Kong-style milk tea making apparatus according to claim 1, further comprising a third water tank communicating with the first pipeline circulation pipeline system to connect the first water tank and the second water tank. The Hong Kong-style milk tea making apparatus according to claim 1, further comprising a refrigerating and freezing device disposed in the casing and communicating with the first circulation piping system and an external water source to pass the control unit and the control The valve is used to freeze the tea. The Hong Kong-style milk tea making device according to claim 4, further comprising a second heat preservation cylinder connected to the first circulation pipeline system and injecting the prepared tea water into the second heat preservation cylinder through the control valve To cool the tea. The Hong Kong-style milk tea making apparatus according to claim 4, further comprising a heat collecting device for absorbing the heat released by the freezing and cooling device to cool the hot tea, and the heat collecting device and the first circulation line The system is in communication such that water flowing through the first circulation piping system absorbs heat from the heat collection device and flows into a third water tank via the control unit and the first circulation piping system. The Hong Kong-style milk tea making device according to claim 3, wherein the third water tank is provided with a temperature sensor and an indicator light, and the temperature sensor senses that the water in the third water tank reaches a predetermined temperature. , the indicator light is on. The Hong Kong-style milk tea making apparatus according to claim 1, wherein the temperature of the first tank is kept constant at 90-95 ° C, and the temperature of the second tank is maintained at 92-98 ° C.