JP4035112B2 - Beverage extractor - Google Patents

Description

  The present invention relates to a beverage extractor.

  BACKGROUND ART A beverage extractor such as a coffee maker includes a water supply tank that receives water, a bucket that stores a beverage extraction raw material, and a base that detachably installs a beverage container that receives the extracted beverage. The water supply tank is connected to a water supply pipe that is connected to the upper part of the bucket through the lower part of the base. The water supply pipe is provided with heating means for heating water in the pipe and heating a beverage container installed on the base so as to be located in the base.

  This beverage extractor operates the heating means by operating a switch in a state where a predetermined amount of water is put in the water supply tank, and executes beverage extraction control. And when this beverage extraction control is complete | finished, the heat retention control for hold | maintaining at predetermined temperature is performed continuously.

  Prior art document information related to the beverage extractor of the present invention includes the following.

Japanese Patent Laid-Open No. 10-201628 JP 2002-204750 A

  In Patent Document 1, when extraction control is started, the temperature sensor detects the start of extraction, and at the same time automatically energizes the coffee heat-retaining heating means to start heat retention control. Moreover, in this patent document 1, the timer display which shows a heat retention time is lighted from the time of starting extraction control, and after that, the timer display is changed sequentially with the passage of time every 30 minutes. Thus, the user is encouraged to drink before the taste deteriorates as the heat retention time becomes longer.

  In Patent Document 2, the temperature control is performed by maintaining the temperature control temperature at the first predetermined temperature until a predetermined time elapses after the start of the heat retention, and when the predetermined time elapses, the temperature control temperature is set to the second predetermined temperature. I try to switch to keeping warm. Thereby, even if the heat retention time exceeds 30 minutes, the extracted beverage can be maintained within the appropriate temperature range of 82 ° C to 85 ° C.

  However, in the beverage extractor of Patent Document 1, when the user stops the heat retention control that is subsequently performed after the beverage is extracted, the heat retention control is performed again, and the beverage capacity in the beverage container is reduced, There is a problem that it is easy to boil. This problem is disadvantageous in that the timer display is reset by execution of re-warming, so that the actual warming time is not understood, and thus it is likely to occur.

  Moreover, in the drink extractor of patent document 2, since the temperature control temperature which performs heat retention control is switched after predetermined time, the problem of a boiled food can be suppressed. However, in the same way as described above, when the heat retention control is once stopped and then performed again, the heat retention control is performed so that the temperature is maintained at a high temperature for the first predetermined time. Probability is high.

  Therefore, an object of the present invention is to provide a beverage extractor that can reliably prevent boiling of a beverage due to heat retention.

In order to solve the above problems, a beverage extractor of the present invention is detachably installed with a water supply tank for receiving water, a bucket for storing beverage extraction raw materials, and a beverage container for receiving a beverage flowing out at the bottom of the bucket. And a water supply pipe that pipes from the water supply tank through the lower part of the base to the upper side of the bucket, and heating means that heats water in the pipe in the base and heats a beverage container installed in the base. A temperature detection means for detecting the temperature of the beverage container; a switch for executing beverage extraction by the heating means; and after the beverage extraction control is executed by controlling the heating means by operating the switch. in the beverage extractor and a control means for executing the normal temperature retaining control of the beverage container Te, the control means, the normal heat keeping control and the To, as well as thermal insulation of the beverage container without performing the extraction control, and a configuration to perform re-incubated control for energizing the heating means at a lower duty ratio than the duty ratio in the normal temperature retaining control, the switch Based on the temperature detected by the temperature detection means within a predetermined determination time after the ON operation or the heating start by the heating means, it is determined whether to perform the extraction control or the reheat control, and the determination The re-warming control is executed when the preset reference temperature is exceeded within the time, and the extraction control is executed when the reference temperature is not exceeded within the judgment time.

In this beverage extractor, two or more different temperature control temperatures are set in the normal heat retention control executed after the extraction control, and the control means indicates in advance that the extraction has been completed after the start of the extraction control. It is preferable to execute the heat retention control at a preset temperature control temperature based on the time required to reach the set temperature.

  In the beverage extractor of the present invention, when the extracted beverage is to be kept warm again, the volume of the beverage in the beverage container is often small, but since the temperature control temperature is low, dedicated control for re-keeping is performed, so It is possible to reliably prevent this problem. In addition, since the re-warming control is performed by simply determining which control is to be executed only by operating the same switch for executing the extraction control, the convenience can be improved. .

Further, since the temperature control temperature of the normal heat retention control to be subsequently executed is changed based on the time required to reach a preset temperature indicating that the extraction is completed after the start of the extraction control, the temperature control temperature is small. In addition to preventing clogging when the amount is extracted, it is possible to prevent the problem of insufficient heat retention when the amount is extracted.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a beverage extractor according to an embodiment of the present invention. The body 10 of this beverage extractor has a nose 11 protruding forward from its upper part and a base 13 protruding forward from its lower part, and in its inside, roughly, a water supply tank, a bucket 18, a base 13, A water supply pipe 21 that connects the water supply tank 16 and the bucket 18, a heater 22 that is a heating means, and a temperature sensor 23 that is a temperature detection means are provided, and the heater 22 is based on the temperature detected by the temperature sensor 23. Is controlled by a microcomputer as control means to execute beverage extraction control and heat retention control.

  The nose 11 is provided with a water supply member 12 for uniformly spraying hot water in a bucket 18 described later. The base 13 is located under a bucket 18 disposed under the nose 11 and detachably installs a beverage container 14 for receiving a beverage flowing out from the bucket 18. On the upper surface of the base 13, a circular metal plate 15 for providing heat to the beverage container 14 by a heater 22 described later is disposed.

  The water supply tank 16 is disposed so as to extend downward from the upper end at the back portion where the nose 11 and the base 13 are continuous in the main body 10, receives water from the upper end opening, and is closed by a removable lid 17. Is.

  The bucket 18 accommodates beverage extraction ingredients, and is rotatably disposed at the lower portion of the nose 11. Specifically, the bucket 18 is provided with a rotatable cover 19 at the lower portion of the nose 11, and is detachably disposed inside the cover 19. In addition, a water stop mechanism 20 is provided at the lower part of the bucket to prevent the beverage inside from being dripped when the beverage container 14 is not disposed on the base 13.

  The water supply pipe 21 is made of a metal piped from the water supply tank 16 through the lower part of the base 13 and above the bucket 18. Specifically, the water supply pipe 21 is first connected to the lower part of the water supply tank 16 so as to extend downward. Then, it is bent at the lower part of the main body 10 and is bent into a U shape as the same axis as the metal plate 15 in the base 13. Thereafter, it extends upward at the back of the main body 10, bends at the top of the main body 10, and is piped on the water supply member 12 in the nose 11.

  The heater 22 is disposed in a U-shape at the upper part of the water supply pipe 21 below the metal plate 15 of the base 13, and heats the water in the water supply pipe 21. The beverage container 14 installed on the base 13 is heated. Further, the heater 22 serves as a supply means for utilizing the pressure rise of hot water heated by heating the water in the water supply pipe 21 and supplying the hot water to the upper bucket 18.

  The temperature sensor 23 includes a thermistor disposed on a fixing member 24 for positioning and fixing the water supply pipe 21 and the heater 22 so as to be positioned in the vicinity of the water supply pipe 21 and the heater 22. The temperature sensor 23 can detect the temperature of the beverage container 14 by heat transmitted through the metal plate 15 with which the beverage container 14 comes into contact and the fixing member 24.

  The microcomputer (not shown) controls the heater 22 and executes the beverage extraction control by operating the switch 25 for performing the beverage extraction disposed in the main body 10, and then the beverage container 14. The normal heat retaining control of the beverage is executed.

And in this embodiment, it is set as the structure which performs the re-warming control which heats the said drink container 14 without performing the said extraction control separately from the normal heat retaining control performed following the said extraction control. Then, the switch 25 is operated, and based on the temperature T detected by the temperature sensor 23 within a preset determination time t1, it is determined which of the extraction control and the re-warming control is to be executed. It is set to do it automatically.

  Specifically, as shown in FIGS. 3A and 3B, the determination time t1 is set to be shorter than the time required to extract one cup of beverage (about 150 seconds). In the embodiment, it is 50 seconds. In addition, a temperature (about 150 ° C.) indicating that the extraction control is completed is set as the reference temperature T1 for determining whether to perform the extraction control or the re-warming control. Then, when the temperature detected by the temperature sensor 23 exceeds the temperature T1 within the determination time t1, re-warming control is executed, and when the temperature T1 does not exceed the temperature T1, extraction control is executed, followed by normal heat control. Is configured to run.

  Here, as shown in FIG. 3A, when the heater 22 is cooled and the user performs a normal drip operation by turning on the switch 25 by putting water into the water supply tank 16, The temperature is increased by heating the heater 22, but the temperature detected by the temperature sensor 23 is gradually increased by passing water through the water supply pipe 21, and reaches the reference temperature T1 after the determination time t1 has elapsed. In addition, as shown in FIG. 3B, when the user turns on the switch 25 for the purpose of keeping heat in a state where the heater 22 is cooled, water is not passed through the water supply pipe 21 and the heater 22 is turned off. Since heat due to heating is directly transmitted to the temperature sensor 23, the detected temperature has a high rising gradient and reaches the reference temperature T1 before the determination time t1 elapses. Therefore, it is possible to determine whether the operation is a normal drip operation or a re-warming operation depending on whether or not a preset reference temperature T1 is exceeded within the determination time t1.

  Further, in the present embodiment, the normal heat retention control executed following the extraction control is set to execute the heat retention control with different temperature control temperatures based on the time t required for the previous extraction control. In other words, the temperature control temperature in the heat retention control is set to be different based on the amount of beverage that the user wants to extract. Specifically, as shown in FIG. 4, the time t required to reach a temperature T <b> 1 indicating that different extraction is completed depending on the amount of beverage to be extracted is measured. Then, a reference time t2 for determining whether to execute the first normal heat retention control with a high temperature control temperature or the second normal heat control with a low temperature control temperature is set, and the time required for extraction When t is more than time t2, 1st normal heat retention control is performed, and when shorter than time t2, 2nd normal heat retention control is performed. The reference time t2 is the time required to extract 5 cups of beverage.

  Table 1 below shows the relationship between the energization rate of the heater 22 and the heat insulation temperature in the extraction control, the normal heat insulation control, and the reheat insulation control.

  As shown in Table 1, in this embodiment, the heater 22 is energized with 100% full power in any of extraction control, normal (first and second) heat retention control, and re-heat retention control. And in extraction control, it continues energizing with the energization rate of 100%, without interrupting energization. In the first normal heat retention control, for example, 150 seconds off and 130 seconds on are repeated, electricity is applied at an energization rate of about 46.4%, and the temperature control temperature of the beverage in the beverage container 14 is about 85 ° C. Insulate control. Further, in the second normal heat retention control, for example, 140 seconds off and 120 seconds on are repeated, and energization is performed at an energization rate of about 46.2% so that the temperature control temperature of the beverage in the beverage container 14 is about 83 ° C. Insulate control. Further, in the re-warming control, for example, 135 seconds off and 115 seconds on are repeated, and energization is performed at an energization rate of about 46.0%, so that the temperature of the beverage in the beverage container 14 is kept at about 82 ° C. Take control.

  Next, the control by the microcomputer will be specifically described.

  When the microcomputer detects the on operation of the switch 25, first, as shown in FIG. 5, the microcomputer performs full energization with full power to the heater 22 in step S1. After that, in step S2, as described above, after executing the re-warming control execution determination process depending on whether or not the reference temperature T1 is reached within the determination time t1, whether or not to execute the re-warming control in step S3. It is detected whether or not 1 is input (execution of re-warming control) to a flag f that means. When 0 is input to f, that is, when the extraction control is executed without executing the re-warming control, the process proceeds to step S4. When 1 is input to f, that is, the re-warming control is performed. When executing, the process proceeds to step S8.

  In step S4, the temperature sensor 23 detects that the extraction operation has been completed after performing the beverage extraction operation while maintaining full energization at full power while measuring with the built-in timer. In step S5, the extraction is performed. It is detected whether the time t required for the control is equal to or longer than the reference time t2. And when it is t> = t2, it progresses to Step S6 and performs the 1st normal heat retention control processing with high temperature control temperature. If t <t2, the process proceeds to step S7, and the second normal heat retention control process with a low temperature control temperature is executed.

  On the other hand, if it is determined in step S3 that re-warming control is to be executed, re-warming control in which the temperature control temperature is lower than the normal warming control is executed in step S8.

  Next, the re-warming control execution determination process in step S2 will be specifically described. In this step S2, separately from the re-warming control execution determination process, the switch 25 is set without setting the empty beverage container 14, or without setting the beverage container 14 and without further filling the water supply tank 16. In the case of an on operation, the emptying determination process is executed in parallel.

  In the re-warming control execution determination process, the microcomputer first starts a built-in timer in step S10 as shown in FIG. Next, in step S11, the temperature T is detected by the temperature sensor 23, and in step S12, it is compared whether or not the detected temperature T is higher than the reference temperature T1. If T> T1, the process proceeds to step S13. If T ≦ T1, the process proceeds to step S15.

  In step S13, 1 is input to the flag f for executing the re-warming control, and in step S14, the timer is reset and the process returns.

  On the other hand, in step S15, it is detected whether or not the measured elapsed time t has exceeded the determination time t1. If the elapsed time t exceeds the determination time t1 (t> t1), the process proceeds to step S16, and 0 is input to the flag f to execute the extraction control, and the process proceeds to step S14 to reset the timer. And return. If the elapsed time t does not exceed the determination time t1 (t ≦ t1), the process returns to step S11.

  Note that the first and second normal warming control and re-warming control in steps S6, S7, and S8 continue to be performed until the switch 25 is turned off, and the heater is turned off when the switch 25 is turned off. The energization to 22 is stopped and the control is terminated.

  Thus, in the beverage extractor of the present embodiment, when the extracted beverage is kept warm again, the volume of the beverage in the beverage container 14 is often reduced, but in this embodiment, only the judgment time t1 is full. After full energization with power, the dedicated control for re-warming is performed with a low temperature control temperature, so the problem of clogging can be reliably prevented. In addition, since the re-warming control is performed by determining which control is automatically executed only by operating the same switch 25 for executing the extraction control, the convenience can be improved. it can.

  Moreover, in this embodiment, since it is set as the structure which changes the temperature control temperature of the normal heat retention control performed continuously based on the time t required for extraction control, it can prevent the clogging when it is a small extraction amount, The problem of insufficient heat retention when the amount of extraction is large can be prevented.

  7 and 8 show the control of the beverage extractor of the second embodiment. In the second embodiment, after the extraction control is completed, the extraction is performed reliably even when the extraction control is continuously performed in a state where the heater 22 is not cooled, and when the normal heat retention control is temporarily stopped and then the temperature is maintained again. The control and the re-warming control can be executed.

  In addition, the structure of each component of the beverage extractor shown in FIGS. 1 and 2, the structure of the extraction control and the re-warming control in the state where the heater 22 is cooled shown in FIGS. 3 (A) and 3 (B), and FIG. 1st and 2nd normal heat retention control performed following extraction control shown in (1) is the same as 1st Embodiment.

  As shown in FIGS. 7A and 7B, in the microcomputer of the second embodiment, when the switch 25 is operated, the temperature T detected by the temperature sensor 23 within the preset determination time t1 is the reference. Whether the extraction control or the re-warming control is to be executed is determined depending on whether or not the temperature T1 is exceeded, but the set time t1 ′ within the determination time t1 is further excluded. In other words, in the second embodiment, after the switch 25 is turned on, when the detected temperature T exceeds the reference temperature T1 within the range of t1 ′ ≦ t ≦ t1, the re-warming control is executed. ing. If the elapsed time t is less than the set time t1 ′, the reference temperature T1 is exceeded. If the elapsed time t does not fall below the reference temperature T1 even after the set time t1 ′ is exceeded, it is determined that there is an abnormality such as emptying. , Configured to stop operation.

  Here, as shown in FIG. 7A, when the user performs a continuous drip operation by putting water into the water supply tank 16 and turning on the switch 25 in a state where the heater 22 is not cooled. The temperature detected by the temperature sensor 23 gradually falls due to water flowing into the water supply pipe 21 and falls below the reference temperature T1 when the set time t1 ′ has elapsed, and then gradually rises again and passes the judgment time t1. After that, the temperature reaches the reference temperature T1. As shown in FIG. 7B, when the user turns off the switch 25 and turns it on again when the heater 22 is not cooled, the temperature detected by the temperature sensor 23 is higher than that of the heater 22. When the set time t1 ′ elapses due to a slight decrease in temperature due to the beverage having a low temperature, the temperature falls below the reference temperature T1, gradually increases again as the beverage rises, and reaches the reference temperature T1 before the determination time t1 elapses. Therefore, it is possible to determine whether the continuous drip operation or the re-warming operation is performed based on whether or not the detected temperature T exceeds the reference temperature T1 within the range of t1 ′ ≦ t ≦ t1.

  Next, the re-warming control execution determination process by the microcomputer of the second embodiment will be specifically described.

  In this re-warming control execution determination process, as shown in FIG. 8, the microcomputer first starts a built-in timer in step S20. Next, in step S21, the temperature T is detected by the temperature sensor 23, and in step S22, it is compared whether or not the detected temperature T is higher than the reference temperature T1. If T> T1, the process proceeds to step S23, and if T ≦ T1, the process proceeds to step S27.

  In step S23, the process waits until the elapsed time t exceeds the set time t1 '. When the elapsed time t exceeds the set time t1 ', the temperature T is detected again in step S24, and whether or not the detected temperature T is higher than the reference temperature T1 is compared in step S25. If T> T1, it is determined that there is an abnormality, the process proceeds to step S26, a stop process is executed, and the operation is terminated. If T ≦ T1, the process proceeds to step S27.

  In step S27, the temperature T is detected by the temperature sensor 23, and in step S28, it is compared whether or not the detected temperature T is higher than the reference temperature T1. If T> T1, the process proceeds to step S29, and if T ≦ T1, the process proceeds to step S31.

  In step S29, 1 is input to the flag f for executing the re-warming control, and in step S30, the timer is reset and the process returns.

  On the other hand, in step S31, it is detected whether or not the measured elapsed time t has exceeded the determination time t1. If the elapsed time t exceeds the determination time t1 (t> t1), the process proceeds to step S32, and 0 is input to the flag f to execute the extraction control, the process proceeds to step S30, and the timer is reset. And return. If the elapsed time t does not exceed the determination time t1 (t ≦ t1), the process returns to step S27.

  In the beverage extractor according to the second embodiment, the same operation and effect as the first embodiment can be obtained, and control according to the user's purpose is automatically performed even when the heater 22 is not cooled. Therefore, convenience can be improved.

  In addition, the drink extractor of this invention is not limited to the structure of the said embodiment, A various change is possible.

  For example, in each of the embodiments, the temperature T is repeatedly detected by the temperature sensor 23 within the determination time t1, but may be detected only once when the determination time t1 has elapsed.

  In addition, the normal temperature control is two types of temperature control with different temperature control temperatures, but the temperature control may be performed at three or more different temperature control temperatures.

It is sectional drawing of the drink extractor of this invention. It is a bottom view of a beverage extractor. (A) is a normal drip, and (B) is a graph showing the transition of temperature when re-warming is performed. It is a graph which shows the transition of the temperature which concerns on the drip control from which extraction amount differs. It is a flowchart which shows control of a microcomputer. It is a flowchart which shows the re-heat retention control execution judgment process of 1st Embodiment. (A) is a continuous drip, (B) is a graph which shows transition of the temperature at the time of performing heat insulation operation for a short time. It is a flowchart which shows the heat retention control execution judgment process of 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Main body, 11 ... Nose, 12 ... Water supply member, 13 ... Base, 14 ... Beverage container, 15 ... Metal plate, 16 ... Water supply tank, 17 ... Lid, 18 ... Bucket, 19 ... Cover, 20 ... Water stop mechanism, DESCRIPTION OF SYMBOLS 21 ... Water supply pipe, 22 ... Heater (heating means), 23 ... Temperature sensor (temperature detection means), 24 ... Fixed member, 25 ... Switch.

Claims (2)

A water supply tank for receiving water, a bucket for storing beverage extraction raw materials, a base for detachably installing a beverage container positioned at the lower portion of the bucket and receiving a beverage to flow out, and the bucket from the water supply tank through the lower portion of the base A water supply pipe piped above, heating means for heating the water in the pipe in the base and heating the beverage container installed in the base, temperature detecting means for detecting the temperature of the beverage container, A switch for executing the beverage extraction by the heating means, and a control means for controlling the heating means by the operation of the switch to execute the beverage extraction control, and subsequently executing the normal heat retention control of the beverage container; In a beverage extractor comprising
In addition to the normal heat retention control , the control means keeps the beverage container warm without executing the extraction control, and reheats the current by energizing the heating means at an energization rate lower than the energization rate in the normal heat insulation control. It is configured to execute control ,
It is determined whether to perform the extraction control or the re-warming control based on the temperature detected by the temperature detection means within a preset determination time after the switch is turned on or the heating means starts heating. The re-warming control is executed when a preset reference temperature is exceeded within the determination time, and the extraction control is executed when the reference temperature is not exceeded within the determination time. Beverage extractor. In the normal heat retention control executed after the extraction control, two or more different temperature control temperatures are set,
The control means is configured to perform the heat retention control at a preset temperature control temperature based on a time required to reach a preset temperature indicating that the extraction is completed after the start of the extraction control. The beverage extractor according to claim 1, wherein

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