JP2007151723A - Current protector for apparatus and coffee drink production apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a current protector for an apparatus capable of safely operating the apparatus by structurally restricting the current capacity, and a coffee drink production apparatus. <P>SOLUTION: This current protector for the apparatus is provided with a heater energization detection means such as a photocoupler detecting the energization states of respective electric heaters 34, 52 and 70 and generating detection signals, and an energization signal generation means generating the energization signals of the respective electric heaters 34, 52 and 70 based on the detection signals from the heater energization detection means and control signals from control devices 100 and 105 and, when either of the electric heaters is energized based on the detection signal from the heater energization detection means, the energization signal generation means prohibits the energization to the other electric heaters despite of the control signals from the control devices 100 and 105. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a device having a plurality of heaters that are controlled independently, for example, a coffee beverage device that extracts coffee liquid from coffee raw material powder made of ground coffee beans, and a current protection device used in these devices. is there.

  Traditionally, in restaurants, etc., coffee has become an essential menu for soft drinks, and in addition to ordinary sprinkling drip coffee, pressure extraction (espresso) coffee is also commonly used. Yes. The above-mentioned drip coffee is a coffee raw material powder made from ground coffee beans crushed to a predetermined particle size in a predetermined chamber, and hot water is sprinkled from an upper sprinkler to extract the coffee liquid. This is the coffee that is usually drunk. On the other hand, in the case of the pressure extraction type, that is, espresso coffee, the coffee raw material powder crushed to a predetermined particle size is loaded into an extraction chamber having a pressure resistant structure, and hot water pressurized by a pump is applied to the coffee raw material powder. The coffee liquid is extracted by passing it through. In this way, elution of coffee components is promoted by using hot water at the time of coffee liquid extraction, and hot water penetrates into the ground bean structure by supplying such hot water under pressure, so that dark coffee liquid That is, espresso coffee is obtained (for example, refer to Patent Document 1).

  Conventionally, such drip coffee and espresso coffee are each extracted and manufactured by separate devices. For this reason, particularly in fast food restaurants that provide hamburgers, donuts, and the like, there is a problem that it is difficult to secure a space for installing these devices due to the limited area of kitchens and counters.

  Therefore, a coffee beverage manufacturing apparatus that can separately extract and manufacture both drip coffee and espresso coffee has been developed. In such an apparatus, an electric heater that heats the water in the hot water tank is used to produce hot water for extraction, and each electric heater is used to extract each coffee. Therefore, if energization control of each electric heater is performed independently, the current capacity that must be secured for energization at the same time increases, so the contract with the power company becomes expensive. There is also a problem. Particularly, each electric heater used for heating hot water is about 1000 W, and the current capacity exceeds the rating when a plurality of electric heaters are energized simultaneously. In this case, there is a possibility of fire and smoke, which is dangerous.

Therefore, for devices with multiple electric heaters that can be controlled independently, time-division control is performed by microcomputer control using a program installed in the control device, and the electric capacity that is simultaneously applied is limited. As a result, the upper limit of the current capacity of the device is limited to, for example, a commonly used rated AC100V15A.
Japanese Patent No. 3015249

  However, in the microcomputer control as described above, when a bug in the program or contact welding of the control relay occurs, normal energization control cannot be performed, and there is still a possibility of ignition or smoke, which is dangerous. is there.

  It is conceivable to use a current interrupting means such as a circuit breaker as a means for preventing the current capacity from exceeding the rating by means other than microcomputer control. However, when a circuit breaker that performs a protection operation at 20A that is generally used is used, for example, when three 1000 W electric heaters are energized at the same time, the protection operation can be reliably performed. When two energizers are energized at the same time, the protective operation may not be executed due to variations in sensitivity due to temperature, variations in the circuit breaker itself, and variations in the current value of the load of the electric heater due to voltage fluctuations. In this case, there is a problem that the protection operation cannot be executed completely.

  Therefore, it is conceivable to use a circuit breaker that performs a protective operation at 15 A. In this case, in a device with a current of about 13 A during normal operation, malfunction may occur due to the rated current correction due to voltage fluctuation and circuit breaker temperature. There is a problem that it cannot be used because it may occur.

  Therefore, if a circuit breaker according to the capacity of the electric heater to be used is not used, a reliable current protection operation cannot be performed. Therefore, a circuit breaker that performs a protection operation with an appropriate current value for each device is provided. There was a problem that it must be used and the production cost cannot be denied.

  Therefore, the present invention has been made to solve the conventional technical problem, and the current protection device for the device and the coffee beverage production that can operate the device safely by structurally limiting the current capacity. A device is provided.

  The current protection device for a device according to the present invention detects the energization state of each electric heater in a device having a plurality of electric heaters and a control means for generating a control signal for controlling each electric heater independently. Heater energization detecting means for generating a detection signal, and energization signal generating means for generating an energization signal for each electric heater based on the detection signal from the heater energization detection means and the control signal from the control means, The energization signal generation means prohibits energization to other electric heaters based on the detection signal from the heater energization detection means, when any of the electric heaters is energized, regardless of the control signal from the control means. It is characterized by that.

  A coffee beverage production apparatus according to a second aspect of the invention includes a plurality of hot water tanks, a plurality of electric heaters for heating each hot water tank to generate hot water of a predetermined temperature for coffee extraction, and the hot water in each hot water tank. Heater energization detecting means for generating a detection signal by detecting the energization state of each electric heater, the control means for generating a control signal for independently controlling the electric heater based on the temperature And an energization signal generating unit that generates an energization signal for each electric heater based on a detection signal from the heater energization detection unit and a control signal from the control unit, and the energization signal generation unit includes the heater energization detection unit When any one of the electric heaters is energized based on the detection signal from, power to other electric heaters is prohibited regardless of the control signal from the control means.

  A coffee beverage production apparatus according to a third aspect of the present invention is a sprinkling-type coffee extraction section for extracting coffee liquid by spraying hot water in a sprinkling hot water tank onto coffee raw material powder by means of a sprinkler, and a pressurized extraction hot water tank. Pressurized extraction type coffee extraction unit that pressurizes and supplies the hot water in the coffee raw material powder to extract the coffee liquid, and an electric heater and pressurization for sprinkling hot water that heats each hot water tank to generate hot water at a predetermined temperature An electric heater for extraction and a control means for generating a control signal for independently controlling each electric heater based on the temperature of the hot water in each hot water tank, Heater energization detecting means for detecting each of the heaters, and energization signal generating means for generating energization signals for the electric heaters based on the detection signal from the heater energization detection means and the control signal from the control means The energization signal generating means is configured to energize other electric heaters regardless of the control signal from the control means when any of the electric heaters is energized based on the detection signal from the heater energization detection means. Is prohibited.

  According to a fourth aspect of the present invention, there is provided a coffee beverage production apparatus according to the above invention, wherein a hot water tank provided in front of the hot water tank for hot water and a hot water tank for pressurized extraction, and the hot water tank for water supply are heated to a predetermined level. An electric heater for water supply that generates hot water at a temperature, and the control means generates a control signal for controlling the electric heater for water supply based on the temperature of the hot water in the hot water tank, The energization signal generation means detects the energization state of the water heater and generates a detection signal. The energization signal generation means is based on the detection signal from the heater energization detection means. When any one of the electric heaters is energized, energization to other electric heaters is prohibited regardless of the control signal from the control means.

  The invention of claim 5 is characterized in that in each of the above inventions, there is provided a current interrupting means for detecting the total current flowing in the circuit and interrupting the power feeding at a predetermined current value.

  According to the current protection device for an appliance of the present invention, in an appliance having a plurality of electric heaters and a control means for generating a control signal for independently controlling each electric heater, the energization state of each electric heater is determined. Heater energization detecting means for detecting and generating detection signals, and energization signal generating means for generating energization signals for each electric heater based on the detection signal from the heater energization detection means and the control signal from the control means. The energization signal generation means is configured to energize other electric heaters regardless of the control signal from the control means when any of the electric heaters is energized based on the detection signal from the heater energization detection means. Even if the control means cannot perform normal energization control due to a bug in the program or contact welding of the control relay, it is prohibited. Whether the current is actually flowing to the electric heater by means, and if any one of the electric heaters is energized by the heater energization detection means, regardless of the control signal from the control means, It becomes possible to prohibit energization to other electric heaters.

  As a result, the current capacity can be structurally limited, and therefore it is possible to prohibit the electric heaters from being energized at the same time even in a device equipped with a plurality of electric heaters having a large electric capacity. Therefore, dangers such as ignition and smoke can be avoided, and the device can be used safely.

  According to invention of Claim 2, based on the temperature of the hot water in each hot water tank, each electric heater which heats each hot water tank, respectively, produces | generates the hot water of the predetermined temperature for coffee extraction, and each hot water tank And a control means for generating a control signal for independently controlling the electric heater, and a heater energization detecting means for generating a detection signal by detecting the energization state of each electric heater, An energization signal generating means for generating an energization signal for each electric heater based on a detection signal from the heater energization detection means and a control signal from the control means, the energization signal generation means from the heater energization detection means; When any electric heater is energized based on the detection signal, energization to other electric heaters is prohibited regardless of the control signal from the control means. Even when normal energization control cannot be performed due to a bug in the ram or contact welding of the control relay, the heater energization detection means detects whether or not current is actually flowing to the electric heater. When any one of the electric heaters is energized by the heater energization detecting means, it is possible to inhibit the energization to other electric heaters regardless of the control signal from the control means.

  As a result, the current capacity can be structurally limited. Therefore, in a coffee beverage manufacturing apparatus provided with a plurality of electric heaters having a large electric capacity to generate hot water at a predetermined temperature, these electric heaters are energized simultaneously. Can be prohibited, dangers such as ignition and smoke can be avoided, and the device can be used safely.

  In addition, since it is possible to reliably prevent a plurality of electric heaters from being energized at the same time, in order to install such a coffee beverage manufacturing apparatus, it does not require construction to increase the current capacity at the installation location, Convenience is improved.

  According to the invention of claim 3, the hot water in the hot water tank for spraying is used to sprinkle the hot water in the hot water tank for spraying onto the coffee raw material powder and extract the coffee liquid, and the hot water in the hot water tank for pressurized extraction. A pressure extraction type coffee extraction unit that supplies a coffee raw material under pressure to extract coffee liquid, a hot water heater that heats each hot water tank to generate hot water of a predetermined temperature, and a pressure extraction electric In a coffee beverage manufacturing apparatus having a heater and a control means for generating a control signal for independently controlling each electric heater based on the temperature of hot water in each hot water tank, the energization state of each electric heater is Heater energization detection means for detecting and generating a detection signal, and energization signal generation means for generating an energization signal for each electric heater based on the detection signal from the heater energization detection means and the control signal from the control means The energization signal generating means is configured to energize other electric heaters regardless of the control signal from the control means when any of the electric heaters is energized based on the detection signal from the heater energization detection means. Therefore, even if the control means cannot perform normal energization control due to a bug in the program or contact welding of the control relay, the heater energization detection means actually supplies current to the electric heater. Whether or not it is flowing, and when one of the electric heaters is energized by the heater energization detection means, energization of the other electric heater is prohibited regardless of the control signal from the control means It becomes possible to do.

  As a result, the current capacity can be structurally limited, so that the electric water heater for generating hot water in the hot water tank for hot water and the pressurization for generating hot water in the hot water tank for pressure extraction are used. In a coffee beverage production apparatus equipped with an electric heater for extraction, it is possible to prohibit the electric heaters with large electric capacities from being energized at the same time, avoid dangers such as ignition and smoke, and safely operate the equipment. Can be used.

  In addition, since it is possible to reliably prevent a plurality of electric heaters from being energized at the same time, coffee beverage production that makes it possible to produce both such sprinkled coffee and pressurized extraction coffee in a single device Since installation of the apparatus does not require construction for increasing the current capacity at the installation location, convenience is improved.

  According to invention of Claim 4, in the said invention, the hot water tank provided in the front | former stage of the sprinkling hot water tank and the hot water for pressure extraction, and the hot water tank for water supply are heated, and hot water of predetermined temperature is heated. And a control means for generating a control signal for controlling the electric heater for water supply based on the temperature of hot water in the hot water tank, and the heater energization detecting means for supplying water While detecting the energization state of the electric heater and generating a detection signal, the energization signal generation means is based on the detection signal from the heater energization detection means, and the hot water heater, the pressure extraction electric heater, and the water heater When any one of these is energized, power to other electric heaters is prohibited regardless of the control signal from the control means, so that the control means is normal due to a bug in the program or contact welding of the control relay. Energizing system Even if it cannot be performed, the heater energization detecting means detects whether or not current is actually flowing to the electric heater, and the heater energization detecting means energizes any one of the electric heaters. If it is performed, it is possible to prohibit energization of other electric heaters regardless of the control signal from the control means.

  Thereby, in addition to the above-described invention, even if an electric heater for water supply is provided, it is possible to structurally limit the current capacity. Therefore, it is prohibited to energize these electric heaters having a large electric capacity at the same time. Therefore, it is possible to avoid dangers such as ignition and smoke, and to use the device safely.

  In addition, since it is possible to reliably prevent a plurality of electric heaters from being energized at the same time, both the hot water type coffee and the pressure extraction type coffee provided with such an electric heater for water supply are used in a single device. In order to install the coffee beverage manufacturing apparatus that can be manufactured, it is not necessary to perform a work for increasing the current capacity at the installation location, thereby improving convenience.

  According to the invention of claim 5, in each of the above inventions, since the current interrupting means for detecting the total current flowing through the circuit and cutting off the power supply at a predetermined current value is provided, the total current flowing through the circuit of the device is The inconvenience of exceeding the rating can be avoided more reliably, the danger of ignition and smoke generation can be avoided, and the device can be used safely.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a coffee beverage production apparatus 1 of the present invention, a side view of the coffee beverage production apparatus 1 of FIG. 2, and FIGS. 3 and 4 show a configuration diagram of the coffee beverage production apparatus 1.

  The coffee beverage production apparatus 1 according to the embodiment is installed in a kitchen or counter of a fast food store, for example, and has a drip coffee extraction unit 1A on one side (right side in FIG. 1) and the other side (FIG. 1). The espresso coffee extraction unit 1B on the left side) is integrated to form a main body 6. In the drip coffee extraction unit 1A, sprinkled hot coffee that is a coffee liquid extracted by spraying hot water on the coffee raw material powder, that is, drip coffee is manufactured, and in the espresso coffee extraction unit 1B, the coffee raw material powder A pressure extraction type coffee, that is, a coffee liquid extracted by supplying hot water under pressure, that is, espresso coffee is produced.

  In the middle of the front surface of the espresso coffee extraction unit 1B, there is provided a nozzle member 4 integrally provided with a coffee liquid nozzle 2 for discharging the coffee liquid of espresso and a milk foam nozzle 3 for discharging milk foam. Below the nozzle member 4 is provided a cup support 7 on which a cup for receiving the extracted coffee liquid is placed. In addition, the nozzle member 4 is comprised so that height adjustment is possible up and down. In addition, a plurality of operation buttons 5 for selecting the type of beverage to be discharged and the like are provided on the upper front portion of the espresso coffee extraction unit 1B, and at the side of the nozzle member 4, in this embodiment, FIG. On the right side, there is provided a residue receiving portion 8 that receives the residue used for the extraction of the coffee liquid and that can be drawn forward. Reference numeral 9 denotes a bean storage container for storing coffee beans.

  On the other hand, a sprinkler 41 is provided at the upper front of the drip coffee extraction unit 1A, and a drip coffee powder chamber 42 is detachably attached to the lower side of the sprinkler 41. Further, a heat retaining pot 43 is provided below the powder chamber 42, and a decanter support base 44 is formed below the heat retention pot 43, and on the decanter support base 44, The heat retention decanter 46 is placed corresponding to the above.

  The heat retaining pot 43 and the heat retaining decanter 46 have, for example, a stainless steel vacuum double structure and have extremely high heat retaining performance. A manual opening / closing valve 47 is provided at the outlet 43 </ b> A of the heat retaining pot 43.

  An extraction button 81 for instructing the start of drip coffee extraction and an extraction lamp (extraction notification means) 82 for notifying that drip coffee is being extracted are provided at the upper front of the drip coffee extraction unit 1A. Yes. Furthermore, a display unit 83 constituted by 7-segment LEDs and an extractable lamp 84 that is turned on when the temperature of hot water in the drip hot water tank 27 described later is a predetermined extractable temperature are provided.

  Next, with reference to FIG.3 and FIG.4, the internal structure of the coffee drink manufacturing apparatus 1 is demonstrated. 3 and 4 show the internal structure of the main body 6 of the coffee beverage production apparatus 1, and are shown divided into two parts at * to show each part in an easily understandable manner. First, the espresso coffee extraction unit 1B includes a hot water tank 10 supplied from a water supply pipe 51 through two water supply valves 48 and 49, and an espresso hot water tank 10 connected to the hot water tank 10 ( A pressurized extraction hot water tank) 11, an espresso pump (gear pump) 12 attached to the bottom of the espresso hot water tank 11, an espresso extraction mechanism 13, a milk former 61, and the like are provided.

  The hot water supply tank 10 is a tank capable of storing several liters of drinking water, and has an electric heater (for water supply) that heats and keeps the water stored in the hot water supply tank 10 at, for example, + 68 ° C. to + 70 ° C. An electric heater) 52 and a water level switch 53 are provided, and a water supply thermistor 54 for detecting the temperature of the hot water tank 10 for water supply and a bimetal thermostat 55 for preventing idling are also attached. The water supply thermistor 54 is connected to a drip hot water tank 27 to be described later, and a temperature near the end of the communicating pipe (hot water supply path) 31 opened in the hot water in the hot water tank 10 for water supply or for water supply. It is assumed that the entire temperature in the tank 10 is detected. The control device 105 provided as the control means provided in the main body 6 is energized to the electric heater 52 and rises to + 70 ° C. when the temperature of the stored water drops to + 68 ° C., based on the temperature detected by the thermistor 54 in principle. If this happens, energization control is performed to cut off energization. Detailed energization control for the electric heater 52 will be described later.

  Further, the water level switch 53 is provided with a low water level at a full water level and a position where a predetermined water level is lowered from the full water level, in this embodiment, a position where the amount of water for one cup of espresso coffee, for example, 150 ml is reduced. The control device 105 performs control to open the water supply valves 48 and 49 when the water level switch 53 detects a low water level and to close when the water level switch 53 detects a full water level. In the present embodiment, the control device 105 prohibits the opening of the water supply valves 48 and 49 for a predetermined period, for example, 15 seconds after the water supply valves 48 and 49 are closed.

  Further, a downcomer pipe 50 that opens on the water surface and descends to the lower part of the hot water supply tank 10 is attached below the opening of the water supply pipe 51. Reference numeral 56 denotes a steam pipe through which steam from the hot water tank 10 or overflowed hot water flows out to the residue receiving portion 8, and a bimetal thermostat 59 for boiling prevention is attached to the steam pipe 56. If the hot water in the hot water supply tank 10 has boiled due to a problem with the control, the bimetal thermostat 59 is turned off at the temperature of the steam and hot water coming out of the steam pipe 56 to supply water. The electric heater 52 is turned off.

  The hot water tank 10 for water supply and the hot water tank 11 for espresso are communicated with each other through a communication pipe 57. In this case, one end of the communication pipe 57 is opened in the hot water in the upper part of the hot water supply tank 10, and the other end is connected to the bottom surface of the espresso hot water tank 11 and opened to the inside. Reference numeral 58 denotes a drain plug provided in the middle of the communication pipe 57.

  The espresso hot water tank 11 is also a tank capable of storing several liters of drinking water, and the water stored in the espresso hot water tank 11 is heated and maintained at, for example, + 94 ° C. to + 97 ° C. (+ 85 ° C.). As described above, an electric heater (pressure extraction electric heater) 70 is provided which is set to an appropriate temperature, and the control device 105 turns on an appropriate temperature lamp (not shown). In addition, an emptying prevention bimetal thermostat 71 and the espresso hot water tank 11 are provided. A thermistor 72 for detecting the temperature is also attached. Based on the temperature detected by the thermistor 72, the control device 105 conducts energization control in which the pressurized extraction electric heater 70 is energized when the temperature of the stored water decreases to + 94 ° C., and is de-energized when it rises to + 97 ° C. As for the electric heater 70, the detailed energization control will be described later, as in the case of the electric heater 52.

  Reference numeral 73 denotes a steam pipe through which steam from the espresso hot water tank 11 or overflowed hot water flows out to the residue receiving portion 8, and this steam pipe 73 is also attached with a bimetal thermostat 74 for preventing boiling. If the hot water in the espresso hot water tank 11 is boiled by any trouble, the bimetal thermostat 74 is turned off at the temperature of the steam and hot water coming out of the steam pipe 73 and pressurized. It is set as the structure which interrupts | blocks electricity supply of the electric heater 70 for extraction.

  An espresso pump 12 provided at the bottom of the espresso hot water tank 11 is a pump that pressurizes and discharges hot water in the espresso hot water tank 11, and the suction port of the espresso pump 12 is an espresso hot water tank. 11 is opened in the hot water in the upper part of the water 11, and the hot water flow pipe 14 and the coffee extraction solenoid valve 15 are sequentially connected to the discharge port, and the hot water supply pipe 16 is connected to the other end of the hot water supply pipe 16. An espresso extraction mechanism 13 is connected.

  The hot water supply side pipe 16 is connected with a circulation pipe 18 provided with a hot water circulation electromagnetic valve 17 which is located between the hot water flow meter 14 and the coffee extraction electromagnetic valve 15 and constitutes a circulation path. The other end of the circulation pipe 18 is connected to the espresso hot water tank 11. A hot water supply pipe 19 is open at one end in the hot water in the upper part of the espresso hot water tank 11, and includes a hot water solenoid valve 21. A nozzle 19A attached to the other end of the hot water supply pipe 19 is provided on the right side of the front surface of the espresso coffee extraction unit 1B in FIG. 1, and discharges only hot water by operating the operation switch 5.

  On the other hand, the bean storage container 9 is installed above the espresso extraction mechanism 13. Below the bean storage container 9, there is provided a coffee mill 22 for pulverizing the coffee beans stored in the bean storage container 9 to a predetermined particle size by a grinding blade (not shown) that rotates at high speed. Below 22, a powder meter 23 for measuring the coffee powder crushed in the coffee mill and a chute 24 for storing the measured coffee powder in the espresso extraction mechanism 13 are provided. An extraction side pipe 25 constituting a coffee liquid extraction path is connected to the lower portion of the espresso extraction mechanism 13, and the extraction side pipe 25 is connected to a coffee extraction electromagnetic valve for controlling the discharge of the extracted coffee liquid. 26 is interposed. The coffee liquid nozzle 2 is connected to an extraction side pipe 25 downstream of the coffee extraction electromagnetic valve 26. As a result, the coffee liquid can be poured into a cup (not shown) arranged on the cup support 7.

  Note that sugar and cream are injected into the cup at the request of the customer along with the injection of the coffee liquid, but the illustration and explanation of these supply systems are omitted.

  The espresso extraction mechanism 13 includes a cylinder that stores ground beans supplied to the chute 24, a piston that can be inserted into and removed from the cylinder, a piston drive motor that drives the piston, and the like. The cylinder unit is composed of a piston, piston drive motor, etc., and further includes a unit for tilting the entire cylinder unit at a predetermined angle, and a lid member for closing the top opening of the cylinder when the cylinder unit is tilted. Configured. Further, the coffee extraction electromagnetic valve 15 includes an adjustment mechanism that adjusts the coffee liquid that has entered the electromagnetic valve 15 so as to have a predetermined pressure or higher.

  Next, the milk former 61 includes a hot water supply pipe 62 for taking out hot water from the hot water supply tank 10, a milk foam electromagnetic pump 63, a milk foam heater block (milk foam electric heater) 64, and a milker. 65 etc. One end of the hot water supply pipe 62 opens into the hot water in the upper part of the hot water tank 10 for water supply, and an electromagnetic pump 63 for milk foam and a heater block 64 for milk foam are sequentially provided. A milker 65 is connected to the other end of the hot water supply pipe 62. Further, the hot water supply pipe 62 located between the milk foam electromagnetic pump 63 and the milk foam heater block 64 is provided with a branch pipe 67, and the branch pipe 67 is opened to the outside with a predetermined pressure. A drain electromagnetic valve 68 is provided.

  The milk foam heater block 64 incorporates an electric heater, and heats the hot water supplied from the hot water supply tank 10 through the hot water supply pipe 62 and the milk foam electromagnetic pump 63 to, for example, about + 170 ° C. to generate steam. The steam is generated and supplied to the milker 65. The milk foam heater block 64 is provided with a temperature sensor (not shown), and the controller 105 controls the temperature so that the steam temperature is set based on the detection of the temperature sensor.

  The milk foamer 61 swirls by discharging steam generated by the milk foam heater block 64 to the milker, sucks milk from the milk pack 66A kept in a predetermined cool box 69 from the milk nozzle 66, This is mixed with air and foamed. And it discharges from the said milk foam nozzle 3, and supplies it to the cup etc. which were mounted under the said nozzle 3.

  Next, the drip coffee extraction unit 1A will be described. The drip coffee extraction unit 1A is provided with a drip hot water tank (sprinkling hot water tank) 27 and the sprinkler 41. The drip hot water tank 27 and the hot water tank 10 for water supply are connected by a communication pipe (hot water supply path) 31. In this case, one end of the communication pipe 31 opens in the hot water in the upper part of the hot water tank 10 for water supply, and the other end is connected to the upper surface in the hot water tank 27 for drip. A connecting pipe 33 is attached to the drip hot water tank 27 so as to descend downward and open at the bottom thereof, and the communicating pipe 31 communicates with the upper end of the connecting pipe 33. Further, in the middle of the communication pipe 31, a pump 32 as a conveying means and a flow washer 30 are provided on the downstream side of the pump 32. The pump 32 is connected to the control device 100, and the operation of the pump 32 is controlled based on the amount of hot water detected by the drip flow meter 28.

  The drip hot water tank 27 is also a tank capable of storing several liters of drinking water, and the water stored in the drip hot water tank 27 is heated and maintained at, for example, + 93 ° C. to + 95 ° C. (+ 85 ° C.). The controller 100 is equipped with an electric heater for heating (electric heater for hot water) 34 and an electric heater 35 for keeping warm (a bimetal thermostat 36 for preventing airing). And a water level switch 76, and a drip thermistor 37 for detecting the temperature of the drip hot water tank 27 is also attached. This drip thermistor 37 detects the temperature in the vicinity of one end of a siphon 29 described later, that is, the temperature of the upper part of the hot water tank 27 for drip. Then, the control device 100 displays the temperature detected by the drip thermistor 37 on the display unit 83, and when the temperature detected by the drip thermistor 37 is + 93 ° C. or higher, the control device 100 is at an appropriate temperature. If there is, the extractable lamp 84 is turned on.

  As a general rule, the control device 100 energizes the heating electric heater 34 when the temperature of the stored water drops to + 85 ° C., and turns off the electric heater 34 when the temperature rises to + 93 ° C., based on the detected temperature of the drip thermistor 37. Take control. Detailed energization control for the electric heater 34 will be described later. Similarly, based on the temperature detected by the drip thermistor 37, the control device 100 energizes the heat retaining electric heater 35 when the temperature of the stored water drops to + 93 ° C., and turns off the electric heater 35 when the temperature rises to + 95 ° C. Take control.

  In addition, the water level switch 76 is provided with a low water level at a full water level and a position where a predetermined water level is lowered from the full water level, in this embodiment, a position where the amount of hot water required for one drip extraction, for example, 1700 ml is reduced. The control device 100 controls the pump 32 to operate when the water level switch 76 detects a low water level and to stop when the water level switch 76 detects a full water level.

  Reference numeral 38 denotes a steam pipe through which steam from the drip hot water tank 27 or overflowed hot water flows out. The steam pipe 38 is controlled by the control device 100 so that it is closed only during the operation of the pump 32 and is always opened. An electromagnetic opening / closing valve (opening / closing means) 38A is provided, and a boil prevention bimetal thermostat 39 is attached. If the hot water in the drip hot water tank 27 is boiled by any trouble, the bimetal thermostat 39 is turned off at the temperature of the steam or hot water coming out of the steam pipe 38, and the electric heater It is set as the structure which interrupts | blocks the electricity supply of 34,35.

  In addition, one end of a siphon 29 having a drip flow meter 28 interposed is connected to the upper part of the drip hot water tank 27, and the other end is connected to the sprinkler 41. The drip flow meter 28 includes a rotor inside, detects the amount of hot water supply by rotating the rotor with flowing hot water and detecting a frequency pulse corresponding to the rotational speed of the rotor. is there. The drip flow meter 28 is connected to the control device 100, and the operation control of the pump 32 is performed based on the detection of the drip flow meter 28. Further, a water distribution pipe 40 having a drainage manual valve 40A is connected to the bottom surface of the drip hot water tank 27.

  Next, with reference to FIG. 5 thru | or FIG. 7, the control circuit regarding the electric heater of the coffee drink manufacturing apparatus 1 in which the current protection apparatus of this invention was used is demonstrated. FIG. 5 is a control circuit diagram of an AC portion related to each electric heater of the coffee beverage manufacturing apparatus 1 in this embodiment to which the current protection device of the present invention is applied. FIG. 6 is a control related to each electric heater of the coffee beverage manufacturing apparatus 1 together with FIG. FIG. 7 shows a circuit diagram in the heater control board 85. FIG.

  The milk foam heater block 64 used in the coffee beverage production apparatus 1 is also configured to prohibit simultaneous energization in the same manner as the electric heaters 34, 52, 70, etc. In order to facilitate understanding of the explanation of the energization control to the electric heater, the explanation of the heater block 64 is omitted.

  In FIG. 5, 120 is a connector connected to a commercial power supply AC (AC100V). Immediately after this connector 120, a circuit breaker 121 is connected as a current interrupting means for interrupting power supply at a predetermined current value. In the lower part of the circuit breaker 121, the following circuit is configured. In this embodiment, a 20A circuit breaker 121 is used.

  An AC input unit is configured in the lower stage of the circuit breaker 121, and a DC input unit is provided in the lower stage of the AC input unit via an AC / DC conversion circuit 99. In the present embodiment, the AC input unit includes, for example, an AC 100 V input device as the electric heater (electric heater for hot water) 34, an electric heater (electric heater for water supply) 52, and an electric heater (electric heater for pressure extraction). ) 70 are connected in parallel, and the electric heater 35 for heat insulation is connected in parallel to the electric heater 34. The electric heaters 34, 52, and 70 used in the present embodiment are all electric heaters having a relatively large electric capacity of about 1000 W, and the heat retaining electric heater 35 used for auxiliary heating has an electric capacity of about 90 W. It is a relatively small electric heater.

  A contact of a heater control relay 88 is connected in series to the electric heater 34, and a contact of a heater control relay 89 is connected in series to the electric heater 35, and a protective thermo 90 is provided for these electric heaters 34, 35. Are connected in series. Note that the contacts of the heater control relay 88 are contacts i and j, and the contacts of the heater control relay 89 are contacts k and l. In addition, a light emitting diode 91D of a photocoupler 91 provided on a heater control board 85, which will be described later, is connected in parallel to the electric heater 34, and a current is also supplied to the phototransistor 91T of the photocoupler 91 as the electric heater 34 is energized. , And the heater control board 85 is a circuit in which the energization state of the electric heater 34 is input. The contacts of the light emitting diode 91D are referred to as contacts e and f.

  The electric heater 52 is connected in series with an OFF contact 53A of a water level switch 53 for detecting a low water level of the hot water supply tank 10, a contact of a heater control relay 92, and a protective thermo 93. A light emitting diode 94D of the photocoupler 94 is connected to the electric heater 52 in parallel. Note that the contacts of the heater control relay 92 are the contacts m and n, and the contacts of the light emitting diode 94D are the contacts a and b. As a result, a current flows through the phototransistor 94T of the photocoupler 94 along with the energization of the electric heater 52, and the energization state of the electric heater 52 is input to the heater control board 85.

  Further, the SSR 95, the protection thermo 96, and the electric heater 70 are connected in parallel to the contact of the heater control relay 92, the protection thermo 93, and the electric heater 52. Unlike the other electric heaters, the electric heater 70 uses SSR instead of the heater control relay in consideration of the number of ON / OFF switching. Note that the contacts of the SSR 95 are referred to as contacts o and p. Similarly, a light emitting diode 97 </ b> D of the photocoupler 97 is connected in parallel to the protective thermo 96 and the electric heater 70. The contacts of the light emitting diode 97 are referred to as contacts c and d. Thus, a current flows through the phototransistor 97T of the photocoupler 97 along with the energization of the electric heater 70, and the energization state of the electric heater 70 is input to the heater control board 85.

  In addition, a light emitting diode 98D of a photocoupler 98 is connected in series to an ON contact 53B of a water level sensor 53 that detects a low water level of the hot water supply tank 10, and along with energization of the ON contact 53B of the water level sensor 53, In addition, a current also flows through the phototransistor 98T of the photocoupler 98, and an energization state to the ON contact 53B of the water level sensor 53 is input to the espresso substrate 87. Note that the contacts of the light emitting diode 98D are contacts g and h.

  These electric heaters 34, 35, 52 and 70 are energized and controlled by a heater control board 85, a drip control board 86 and an espresso control board 87 shown in FIG. 6. Any of the control boards 85, 86, 87 is connected to a 24V DC input section via an AC / DC conversion circuit 99 connected to a commercial AC power source. As will be described in detail later, the heater control board 85 detects that the electric heaters 34, 52, and 70 are actually energized and at the same time prohibits the electric heaters 34, 52, and 70 from being energized. It is a substrate.

  The drip control board 86 is provided with a control device (control means) 100 composed of a general-purpose microcomputer. The power supply circuit 101 converts 24V current supplied from the AC / DC conversion circuit 99 to 5V. Power is supplied. The control device 100 includes a memory that stores programs and data, a timer that generates a clock signal, and a CPU that operates based on the clock signal and the program. Further, the control device 100 includes a drip thermistor 37 for detecting the temperature of the drip hot water tank 27, a low water level switch 76A and a full water level switch 76B of the water level switch 76, a flow meter 28, a pump 32 and the like not shown in FIG. It is connected. The control device 100 is connected to a coil of a heater control relay 89 that controls energization of the electric heater 35 via an inverter 102 for driving a relay. The heater control relay 88 is connected to a coil terminal 88A of a heater control relay 88 that controls energization of the electric heater 34. The coil of the heater control relay 88 is connected to the coupler A-6. The control device 100 is connected to the coupler A-5 via the inverter 103.

  The espresso control board 87 is provided with a control device (control means) 105 composed of a general-purpose microcomputer. The power supply circuit 106 converts 24V current supplied from the AC / DC conversion circuit 99 into 5V. Power is supplied. The control device 105 includes a memory that stores programs and data, a timer that generates a clock signal, and a CPU that operates based on the clock signal and the program. The control device 105 includes a water supply thermistor 54 that detects the temperature of the hot water tank 10, a thermistor 72 that detects the temperature of the espresso water tank 11, a flow meter 14 (not shown in FIG. 6), and the espresso pump 12. The coffee extraction electromagnetic valve 15, the hot water circulation electromagnetic valve 17, the hot water supply electromagnetic valve 21, the coffee extraction electromagnetic valve 26, the drain electromagnetic valve 68, the espresso extraction mechanism 13 and the like are connected. Further, the control device 105 is connected to a phototransistor 98T of a photocoupler 98 that detects an energization state to the ON contact 53B of the water level sensor 53. The phototransistor 98T is directly connected to the power supply circuit 106, and is supplied with 5V current without going through the control device 105. The espresso control board 87 is provided with a coil of the heater control relay 92 to which the coupler A-2 is connected. The coil of the heater control relay 92 is connected to the coupler A-4 via the SSR 95. Has been. Further, the control device 105 is connected to the coupler A-1 via the inverter 107 and is connected to the coupler A-3 via the inverter 108.

  Next, the heater control board 85 will be described with reference to FIG. V-1 is a coupler connected to the contact point a shown in FIGS. 5 and 6, and V-2 is a coupler connected to the contact point b shown in FIGS. The coupler V-1 is connected to the light emitting diode 94D of the photocoupler 94 via the rectifying / smoothing circuit 110. An inverter 111 is connected to the phototransistor 94T of the photocoupler 94, and a resistor 112 having one end connected to a DC power source is connected between the input of the inverter 111 and GND. Further, the output of the inverter 111 is connected to the inputs of inverters 114 and 115 through a resistor 113 having one end connected to a DC power source. A circuit including the photocoupler 94, the inverter 111, and the rectifying / smoothing circuit 110 constitutes a current detection unit that detects energization of the electric heater 52. Hereinafter, for convenience, the input side of the inverter 111 is referred to as point A, the input side of the inverter 114 is referred to as point P, and the input side of the inverter 115 is referred to as point N.

  V-3 is a coupler connected to the contact c shown in FIGS. 5 and 6, and V-4 is a coupler connected to the contact d shown in FIGS. The coupler V-3 is connected to the light emitting diode 97D of the photocoupler 97 via the rectifying / smoothing circuit 117. An inverter 118 is connected to the phototransistor 97T of the photocoupler 97, and a resistor 119 having one end connected to a DC power source is connected between the input of the inverter 118 and GND. Further, the output of the inverter 118 is connected to the inputs of inverters 121 and 122 through a resistor 120 having one end connected to a DC power source. In addition, a circuit including the photocoupler 97, the inverter 118, and the rectifying / smoothing circuit 117 constitutes a current detection unit that detects energization of the electric heater 70. The input side of the inverter 118 is referred to as point B, the input side of the inverter 121 is referred to as point J, and the input side of the inverter 122 is referred to as point O.

  W-1 is a coupler connected to the contact point e shown in FIGS. 5 and 6, and W-2 is a coupler connected to the contact point f shown in FIGS. The coupler W-1 is connected to the light emitting diode 91D of the photocoupler 91 via the rectifying / smoothing circuit 124. In addition, an inverter 125 is connected to the phototransistor 91T of the photocoupler 91, and a resistor 126 having one end connected to a DC power source is connected between the inverter 125 and GND. Further, the output of the inverter 125 is connected to the inputs of inverters 128 and 129 through a resistor 127 having one end connected to a DC power source. In addition, a circuit including the photocoupler 91, the inverter 125, and the rectifying / smoothing circuit 124 constitutes a current detection unit that detects energization of the electric heater 34. The input side of the inverter 125 is referred to as C point, the input side of the inverter 128 is referred to as K point, and the input side of the inverter 129 is referred to as M point.

  The outputs of the inverters 121 and 128 are connected in parallel with the output of the inverter 130. A resistor 131 having one end connected to a DC power source is connected between the input of the inverter 130 and the coupler A-1. Furthermore, the input of the inverter 132 is connected to the output side of the inverters 130, 121, and 128, and the output of the inverter 132 is connected to the coupler A-2. A resistor 133 is connected between the inverter 132 and the inverter 130. The inverters 121, 128, 130, 132 and the resistors 131, 133 constitute energization signal generation means that generates an energization signal for the electric heater 52. The input side of the inverter 130 is referred to as point D, and the input side of the inverter 132 is referred to as point G.

  The outputs of the inverters 114 and 129 are connected in parallel with the output of the inverter 134. A resistor 135 having one end connected to a DC power source is connected between the input of the inverter 134 and the coupler A-3. Furthermore, the input of the inverter 136 is connected to the output side of the inverters 134, 114, and 129, and the output of the inverter 136 is connected to the coupler A-4. A resistor 137 is connected between the inverter 136 and the inverter 134. The inverters 114, 129, 134 and 136 and the resistors 135 and 137 constitute energization signal generating means for generating an energization signal for the electric heater 70. The input side of the inverter 134 is referred to as point E, and the input side of the inverter 136 is referred to as point Q.

  Further, the outputs of the inverters 115 and 122 are connected in parallel with the output of the inverter 138. A resistor 139 having one end connected to a DC power source is connected between the input of the inverter 138 and the coupler A-5. Furthermore, the input of the inverter 140 is connected to the output side of the inverters 138, 115, 122, and the output of the inverter 140 is connected to the coupler A-6. A resistor 141 is connected between the inverter 140 and the inverter 138. The inverters 115, 122, 138, 140 and the resistors 139, 141 constitute energization signal generating means for generating an energization signal for the electric heater 34. The input side of the inverter 138 is referred to as F point, and the input side of the inverter 140 is referred to as I point.

  The heater control board 85 is connected to a coupler A-7 whose one end is connected to a 24V DC power source and to a coupler A-8 whose one end is connected to GND.

  With the above configuration, the operation of the coffee beverage manufacturing apparatus 1 of the present embodiment will be described. Before the operation button 5 is operated, any solenoid valve is not energized and is closed or allowed to flow through hot water above a certain pressure.

(1) Water Supply After turning on the power, the control device 105 energizes and opens the water supply valves 48 and 49 to supply water to the hot water supply tank 10. At this time, since the espresso hot water tank 11 is connected to the hot water supply tank 10 through the communication pipe 57, the espresso hot water tank 11 is also supplied to the espresso hot water tank 11 through the communication pipe 57 by the Pascal principle. And the same water level. Further, the control device 105 operates the pump 32 for a predetermined time, and causes the water in the hot water supply tank 10 to flow into the drip hot water tank 27 from the communication pipe 31 to reach a full water level.

  In this way, when the drip hot water tank 27 becomes full and the water level switch 53 detects the full water level of the hot water supply tank 10 (espresso hot water tank 11), the control device 105 closes the water supply valves 48 and 49. When the hot water supply tank 10 is below a predetermined low water level and the ON contact of the low water level switch of the water level switch 53 is closed, the light emitting diode 98D of the photocoupler 98 is energized and the electric heaters 52 and 70 are energized. Is configured such that energization of the electric heaters 52 and 70 is permitted with the OFF contact of the low water level switch closed.

(2) Generation of hot water Next, the control devices 100 and 105 generate hot water in the hot water tanks 10, 11 and 27. In this case, the control devices 100 and 105 control so that any two of the electric heaters 52 and 59, the heater 34 and the milk foam heater block 64 are not energized at the same time. And energization of equipment necessary for espresso coffee extraction (pump 32, espresso pump 12, coffee extraction electromagnetic valves 15, 25, espresso extraction mechanism 13, etc., including electric heater 35 for heat insulation). .

  In addition, in the embodiment, the control devices 100 and 105 preferentially energize the electric heater 70 of the espresso hot water tank 10 and the electric heater 34 of the drip hot water tank 27, and perform an input operation to the operation switch 5 to perform espresso hot water. It is possible to set which of the electric heater 70 of the tank 10 and the electric heater 34 of the hot water tank 27 for drip has the highest priority.

  If the electric heater 34 is preferentially set because a large amount of drip coffee is sold at the store of the embodiment, the control devices 100 and 105 are energized to the electric heaters 34 of the electric heaters 52 and 70 and the electric heater 34. Start first. When the temperature of the hot water in the drip hot water tank 27 rises to the above-mentioned + 93 ° C., the electric heater 34 is deenergized, and thereafter, the heat retaining electric heater 35 is energized as described above to control the electric current in the drip hot water tank 27. The hot water temperature is maintained at + 93 ° C. to + 95 ° C.

  Next, the control devices 100 and 105 start energizing the electric heater 70 of the espresso hot water tank 11 from the time when the energization to the electric heater 34 is cut off. When the hot water temperature in the espresso hot water tank 11 rises to + 97 ° C., the electric heater 70 is deenergized. Next, the control devices 100 and 105 start energizing the electric heater 52 of the hot water tank 10 from the time when the energization to the electric heater 70 is cut off. And if the temperature of the hot water in the hot water tank 10 for water supply rises to +70 degreeC mentioned above, electricity supply to the electric heater 52 will be cut off. Then, energization of the milk foam heater block 64 is started from the time when the energization of the electric heater 52 is cut off, and the temperature is raised to the above-described temperature.

  When the temperature of hot water in the drip hot water tank 27 is reduced to + 93 ° C. due to the extraction of drip coffee as will be described later, the electric heater 34 is energized again. When the electric heaters 52 and 70 and the milk foam heater block 64 are energized, the energization of the electric heaters 52 and 70 and the milk foam heater block 64 is interrupted. Similarly, when the temperature of the hot water in the espresso hot water tank 11 is lowered to + 94 ° C. due to the extraction of espresso coffee, the electric heater 70 is energized again. When the milk foam heater block 64 is energized, the energization of the electric heater 52 and the milk foam heater block 64 is interrupted. Similarly, when the temperature of the hot water in the hot water supply tank 10 drops to + 68 ° C., the electric heater 52 is energized again. At that time, the low-priority milk foam heater block 64 is energized. If it is, the energization to the milk foam heater block 64 is interrupted.

  In this manner, a predetermined amount of hot water is generated in the drip hot water tank 27, the espresso hot water tank 11, and the water supply hot water tank 11, and the milk foam heater block 64 is heated to the standby temperature.

  Here, in the heater control board 85, when the electric heaters 34, 52, and 70 are not energized, no current flows through the light emitting diodes 94D, 97D, and 91D of all the photocouplers. The phototransistors 94T, 97T, and 91T are not energized. For this reason, the input side of any of the inverters 111, 118, and 125 at point A, point B, and point C in FIG. Here, the couplers A-1 and A-3 are connected to the espresso control board 87, and the coupler A-5 is connected to the drip control board 86. Therefore, when any of the electric heaters 34, 52, and 70 is energized, a current flows through the light-emitting diodes 94D, 97D, and 91D of the energized photocoupler, and the phototransistors 94T, 97T, and 91T of the corresponding photocoupler. The input side of the corresponding inverter 111, 118, 125 of point A, point B, or point C is at the L level.

  On the other hand, when the control devices 100 and 105 deenergize the electric heaters 34, 52 and 70, an H signal is output via the couplers A-1, A-3 and A-5. At this time, since the inverters 132, 136, and 140 connected to the G point, the Q point, and the I point are connected to other signals by open collectors, the D point, the E point, and the F point become H level. Regardless of other signals, the points G, Q and I are fixed at the L level.

  The couplers A-2, A-4, and A-6 are connected to the coil sides of the heater control relay 92, SSR, and heater control relay 88 of the electric heaters 52, 70, and 34, respectively. Since 136 and 140 are open collectors, the heater control relays 92, 88, and SSR are not energized unless the coupler level becomes L level. The heater control relays 92 and 88 are NO, and when the coil is energized, the contact is closed and the electric heaters 52 and 34 are energized.

  Here, when the control devices 100 and 105 output energization signals only to the electric heater 52, the point D on the input side of the inverter 130 is at the L level, and the points E and F on the input side of the inverters 134 and 138 are at the H level. It is said that. Since the electric heater 52 is energized, the light emitting diode 94D of the photocoupler 94 is energized, and the point A on the input side of the inverter 111 becomes L level. On the other hand, since the electric heaters 70 and 34 are not energized, the light-emitting diodes 97D and 91D of the respective photocouplers 97 and 91 are de-energized, and points B and C on the input side of the inverters 118 and 125 are H Level.

  At this time, the point G on the input side of the inverter 132 is at the H level because the points J and K are at the L level and the point D is at the L level. Therefore, the coupler A-2 becomes L level, the coil of the heater control relay 92 is energized, the contact is closed, and the electric heater 52 is energized.

  On the other hand, the point E on the input side of the inverter 134 is at the L level and the point P on the input side of the inverter 114 is energized by the electric heater 52 due to the OFF signal from the control device 105. Since the point M on the input side is L level because the electric heater 34 is not energized, the point Q on the input side of the inverter 136 is L level, and the coupler A-4 is H level. It is said.

  Similarly, the F signal that is the input side of the inverter 138 is at the L level and the N point that is the input side of the inverter 115 is energized by the electric heater 52 due to the OFF signal from the control device 100. Since the electric heater 70 is not energized, the point O on the input side becomes L level, so that the point I on the input side of the inverter 140 becomes L level and the coupler A-6 becomes H level. It is energized.

  In the present embodiment, the case where only the electric heater 52 is energized is described. However, when only the electric heater 70 or only the electric heater 34 is energized, the energization of other electric heaters may be similarly prohibited. it can.

  Here, after a programming error, bug, or other malfunction of the control device 100 or 105 occurs, for example, an energization signal of the electric heater 70 is output after the electric heater 52 is energized and before the electric heater 52 is de-energized. Even if it is, the point P on the input side of the inverter 114 is at the H level because the electric heater 52 is energized, and the point Q on the input side of the inverter 136 is from the coupler A-3. Regardless of the input signal, the electric heater 52 and the electric heater 70 are not energized simultaneously.

  Therefore, after the electric heater 52 is energized, when the control device 105 deenergizes the electric heater 52 and energizes the other electric heaters 34 and 70, the contact of the heater control relay 92 of the electric heater 52 is welded. Even when the electric heater 52 is energized continuously, contrary to the control in the control device 105, the other electric heaters 34 and 70 are not energized at the same time by the above circuit configuration. It is possible to avoid the disadvantage that the total current value in the circuit exceeds the rating.

  As a result, even if a plurality of electric heaters are provided in one coffee beverage manufacturing apparatus 1, it is possible to structurally limit the current capacity, so that these electric heaters having a large electric capacity are energized simultaneously. This can be prohibited, dangers such as ignition and smoke can be avoided, and the device can be used safely.

  In addition, since it is possible to reliably prevent a plurality of electric heaters from being energized at the same time, both the hot water type coffee and the pressure extraction type coffee provided with the electric heater 52 for water supply are provided as a single device. In order to install the coffee beverage manufacturing apparatus 1 that can be manufactured in the manufacturing process, it is not necessary to perform a work for increasing the current capacity at the installation location, so that convenience is improved.

  In the above case, since the electric heater 52 is energized continuously, the protection thermo 93 in the circuit of the electric heater 52 is finally operated and the circuit of the electric heater 52 is cut off. Become.

  Then, the control devices 100 and 105 control the electric heater in spite of the fact that the temperature of the hot water supply tank 10 provided with the non-energized electric heater 52 does not drop and the other electric heater 34 or 70 is energized. Since the temperature of the hot water tanks 11 and 27 provided with 34 or 70 does not rise, it is possible to detect a failure and estimate the cause after a certain period of time.

  In order to protect the entire circuit, a circuit breaker 121 as a current interrupting means is provided immediately after the connector 120. As a result, when an inverter used in the circuit on the heater control board 85 is destroyed due to a surge voltage or the like regardless of the control in the control device, if the internal short circuit is caused and the heater is energized, all the electric heaters 34, 52 and 70 are energized at the same time, and the total current exceeds 30 A. However, the circuit breaker 121 rated at 20 A can protect the entire device.

(3) Extraction of espresso coffee When the espresso coffee is selected by the operation button 5 provided on the main body 6, the espresso coffee extraction start input is performed to the control device 105. Thereby, the control apparatus 105 opens the hot water circulation electromagnetic valve 17, and performs the pipe | tube temperature rising process which performs the low speed driving | operation of the espresso pump 12 for predetermined time, 4 seconds in the Example. Thereby, hot water in the espresso hot water tank 11 is sent out by the espresso pump 12 to the hot water circulation electromagnetic valve 17 and the circulation pipe 18 constituting the circulation path via the hot water supply side pipe 16.

  The hot water staying in the hot water supply side pipe 16 located between the espresso pump 12 and the coffee extraction electromagnetic valve 15 is pumped to the circulation pipe 18 via the hot water circulation electromagnetic valve 17 and is supplied to the espresso hot water tank 11. Returned. Thus, the hot water supply side pipe 16 positioned between the espresso pump 12 and the coffee extraction electromagnetic valve 15 is heated with hot water of about + 94 ° C. to + 97 ° C. supplied from the espresso hot water tank 11. it can.

  After the predetermined time has elapsed since the start of the pipe temperature raising step, the control device 105 stops the operation of the espresso pump 12, then closes the hot water circulation electromagnetic valve 17, and ends the pipe temperature raising step. On the other hand, the espresso extraction mechanism 13 is subjected to the next extraction preparation process after the end of the previous coffee liquid supply process. That is, in the extraction preparation step, first, the control device 105 puts the cylinder of the espresso extraction mechanism 13 in an upright state, pulverizes the coffee beans in the bean storage container 9 in advance in the coffee mill 22, and ground beans (coffee raw material powder). In this state, a predetermined amount of coffee powder measured by the powder meter 23 is supplied into the cylinder through the chute 24.

  Thereafter, when the supply of the ground beans is completed, the control device 105 energizes and operates the piston drive motor, rotates the entire cylinder unit downward about the lower end, and tilts the cylinder at a predetermined angle. Thereafter, the control device 105 seals the upper end opening of the cylinder with a lid member. At this time, the control device 105 lowers the lid member in synchronization with the inclination of the cylinder unit, inserts it into the cylinder, and stops the driving of the piston drive motor. Furthermore, the control apparatus 105 operates a piston drive motor, pushes up a piston, and compresses the ground beans in a cylinder.

  In this state, the control device 105 proceeds to the coffee liquid extraction process, opens the coffee extraction electromagnetic valve 15 and drives the espresso pump 12. As a result, the hot water in the upper portion of the espresso hot water tank 11 heated to about + 94 ° C. to + 97 ° C. at a pressure of 0.3 MPa is supplied to the cylinder of the espresso extraction mechanism 13.

  Thereafter, the control device 105 supplies hot and pressurized hot water to the cylinder sealed with the lid member via the hot water supply side pipe 16 to extract coffee liquid from the compressed ground beans. At this time, high-temperature and high-pressure hot water is supplied into the cylinder, so that a dark coffee liquid, that is, espresso coffee from which the coffee components are sufficiently eluted from the beginning of extraction is extracted.

  Then, the coffee liquid extracted by the cylinder of the espresso extraction mechanism 13 is discharged to the coffee liquid nozzle 2 via the extraction side pipe 25 and the coffee extraction electromagnetic valve 26. Here, the coffee extraction electromagnetic valve 26 is set in a state in which the coffee liquid is allowed to flow at a constant pressure, for example, 0.3 MPa or more, by the control device 105, so that a constant pressure (this embodiment) Then, a pressure of 0.3 MPa is applied by the espresso pump 12 and further pressure is applied by the ground beans swollen in the cylinder, so that a pressure of 0.4 MPa or more can be actually applied) become. As a result, fine fine bubbles can be generated on the surface of the coffee liquid, and a coffee liquid with a rich and mellow taste and aroma can be obtained, so that the quality of the coffee liquid can be improved. Become.

  When the coffee liquid is extracted from the cup or the like, when the control device 105 energizes the electromagnetic pump 63 for milk foam, the milk former 61 is operated as described above, and the upper surface of the extracted coffee liquid. The frothed milk will be poured.

  Here, when the water level of the espresso hot water tank 11 is lowered by the production / extraction of espresso coffee (about 150 ml for one cup), the water level of the hot water tank 10 connected through the communication pipe 57 reaches the low water level. descend. When the water level switch 53 detects the low water level, the control device 105 opens the water supply valves 48 and 49 and replenishes the hot water tank 10 with water for drinking. The replenished water flows into the lower part of the hot water supply tank 10 through the downcomer 50. The control device 105 detects the predetermined full water level and closes the water supply valves 48 and 49, but hot water corresponding to the increased water level flows into the lower part of the espresso hot water tank 11 through the communication pipe 57. As described above, the water supply valves 48 and 49 are prohibited from being opened for a predetermined time, that is, 15 seconds after being closed by the control device 105.

  In this case, the hot water distributed and supplied from the hot water tank 10 to the espresso hot water tank 11 is hot water in the upper part of the hot water tank 10 (the water to be replenished is the hot water for water supply through the downcomer 50). Since it flows into the lower part of the tank 10, hot water of about + 70 ° C. flows into the espresso coffee hot water tank 11), and the temperature of the hot water in the espresso hot water tank 11 due to replenishment of hot water from the hot water tank 10 for water supply Degradation is minimized.

  The controller 105 energizes the electric heater 70 to raise the temperature when the temperature of the hot water in the espresso hot water tank 11 is lowered to + 94 ° C. as described above, but the time for raising the temperature to + 97 ° C. is short. This eliminates as much as possible the period of lower than + 85 ° C., which is the appropriate temperature, and prevents sales loss.

(4) Extraction of drip coffee Next, when extracting drip coffee, first, a predetermined amount of ground beans (coffee raw material powder) for drip is put into the powder chamber 42 (for 8 cups in this embodiment). Set under the sprinkler 41. When drip coffee is selected with the operation button 5 provided on the main body 6, drip coffee extraction start input is performed to the control device 100. As a result, when the water level switch 76 detects a low water level, the control device 100 operates the pump 32 to supply 8 cups of hot water from the hot water supply tank 10 to the hot water tank for drip 27. Since the amount of hot water required for one drip extraction is, for example, 1700 ml, the 1700 ml is replenished. Since the drip hot water tank 27 is always full, the replenished hot water is pushed out from the upper part of the drip hot water tank 27 to the siphon 29 and sprayed from the sprinkler 41 to the powder chamber 42 via the siphon 29. Is done.

  In this case, the hot water from the hot water supply tank 10 flows from the lower end of the connecting pipe 33 into the lower part of the drip hot water tank 27, so the hot water having a high temperature of about + 96 ° C. in the upper part of the drip hot water tank 27 is added to the siphon 29. Will be pushed out. Accordingly, the ground beans are sufficiently steamed in the powder chamber 42, and smooth coffee liquid extraction is performed.

  Thereafter, the coffee liquid extracted in the powder chamber 42 flows down into the heat retaining pot 43 from the lower end and is stored. The heat retaining pot 43 has a capacity of 1 to several liters, and has a high heat retaining capacity with a vacuum double structure, so that the drip coffee extracted without a heat retaining heater is kept at a suitable temperature for a predetermined period. Can keep warm. When the drip coffee is provided, the coffee extraction manual valve 47 of the heat retaining pot 43 is opened, and the drip coffee in the heat retaining pot 43 is discharged into the heat retaining decanter 46 disposed below it. Will be poured into the cup.

  In this embodiment, the pump 32 is operated by the lower limit switch of the water level switch 76 to perform hot water supply work. However, the present invention is not limited to this, and the pump 32 is operated based on the output of the drip flow meter 28. It may be controlled.

  Further, in the embodiments, drip coffee and espresso coffee have been described as examples. However, the hot water type coffee and the pressure extraction type coffee are not limited to these, and include any name of coffee of each extraction method. .

  In the said Example, although the current protection in the apparatus provided with the several electric heater in the one coffee drink manufacturing apparatus 1 is explained in full detail, it is not limited to the said apparatus, The electric heater with a big electric capacity Similarly, even in a device equipped with a plurality of devices, current protection can be realized by the circuit structure regardless of the control by the control device.

It is a front view of the coffee drink manufacturing apparatus of a present Example. It is a side view of the coffee drink manufacturing apparatus of FIG. It is an internal block diagram of the coffee drink manufacturing apparatus of FIG. It is an internal block diagram of the coffee drink manufacturing apparatus of FIG. 1 similarly. It is a control circuit diagram of the AC part regarding each electric heater of the coffee beverage manufacturing apparatus in the present Example to which the current protection device of the present invention is applied. It is the control circuit diagram of DC part which comprises the control circuit regarding each electric heater of a coffee drink manufacturing apparatus with FIG. It is a circuit diagram in a heater control board.

Explanation of symbols

AC commercial power supply A-1 to A-8, V-1 to V-4, W-1, W-2 Coupler 1 Coffee beverage production apparatus 1A Drip coffee extraction unit 1B Espresso coffee extraction unit 5 Operation buttons 6 Main body 10 For water supply Hot water tank 11 Espresso hot water tank (Pressure extraction hot water tank)
27 Drip hot water tank (Spring hot water tank)
28 Flow meter for drip 34 Electric heater (electric heater for hot water)
35 Electric heater for heat insulation 37 Thermistor for drip 52 Electric heater (electric heater for water supply)
53 Water level switch 54 Thermistor for water supply 70 Electric heater (electric heater for pressure extraction)
72 Thermistor 76 Water Level Switch 85 Heater Control Board 86 Drip Control Board 87 Espresso Control Board 88, 89, 92 Heater Control Relay 90, 93, 96 Protection Thermo 91, 94, 97, 98 Photocoupler 95 SSR
99 AC / DC conversion circuit 100, 105 Control device (control means)
101, 106 Power supply circuit 102, 107, 108, 111, 114, 115, 118, 121, 122, 125, 128, 129, 130, 132, 134, 136, 138, 140 Inverter 113, 119, 120, 126, 127 131, 133, 135, 137, 139, 141 Resistance

Claims (5)

In an apparatus having a plurality of electric heaters and a control means for generating a control signal for independently controlling each electric heater,
Heater energization detecting means for detecting the energization state of each electric heater and generating a detection signal;
An energization signal generating means for generating an energization signal for each electric heater based on a detection signal from the heater energization detection means and a control signal from the control means;
The energization signal generating means, based on a detection signal from the heater energization detection means, when any of the electric heaters is energized, energizes other electric heaters regardless of the control signal from the control means. A current protection device for equipment characterized by prohibiting A plurality of hot water tanks, a plurality of electric heaters for heating each hot water tank to generate hot water at a predetermined temperature for coffee extraction, and the electric heaters independently based on the temperature of the hot water in each hot water tank In a coffee beverage production apparatus having control means for generating a control signal for control,
Heater energization detecting means for detecting the energization state of each electric heater and generating a detection signal;
An energization signal generating means for generating an energization signal for each electric heater based on a detection signal from the heater energization detection means and a control signal from the control means;
The energization signal generating means, based on a detection signal from the heater energization detection means, when any of the electric heaters is energized, energizes other electric heaters regardless of the control signal from the control means. A coffee beverage production apparatus characterized by prohibiting The hot water in the hot water tank is sprinkled on the coffee raw material powder by a sprinkler to extract the coffee liquid, and the hot water in the hot water tank for pressurized extraction is supplied under pressure to the coffee raw material powder. A pressure extraction type coffee extraction unit for extracting coffee liquid, an electric heater for hot water and a pressure extraction electric heater for heating each hot water tank to generate hot water of a predetermined temperature, In a coffee beverage production apparatus having control means for generating a control signal for independently controlling each electric heater based on the temperature of hot water,
Heater energization detecting means for detecting the energization state of each electric heater and generating a detection signal;
An energization signal generating means for generating an energization signal for each electric heater based on a detection signal from the heater energization detection means and a control signal from the control means;
The energization signal generating means, based on a detection signal from the heater energization detection means, when any of the electric heaters is energized, energizes other electric heaters regardless of the control signal from the control means. A coffee beverage production apparatus characterized by prohibiting A hot water tank for water supply provided in front of the hot water tank for spraying and pressurized hot water tank, and an electric heater for water supply for heating the hot water tank for supplying water to generate hot water at a predetermined temperature,
The control means generates a control signal for controlling the electric heater for water supply based on the temperature of the hot water in the hot water tank, and the heater energization detecting means determines the energization state of the water heater. Detect and generate a detection signal,
The energization signal generating means is based on a detection signal from the heater energization detection means, and when any one of the hot water electric heater, the pressure extraction electric heater, and the water supply electric heater is energized, 4. The coffee beverage production apparatus according to claim 3, wherein energization to other electric heaters is prohibited regardless of a control signal from the control means.   The apparatus for protecting a current of a device or coffee according to any one of claims 1 to 4, further comprising current interrupting means for detecting a total current flowing in the circuit and interrupting power supply at a predetermined current value. Beverage production equipment.

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