JP2017124849A - Beverage server - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a beverage server capable of providing low temperature beverage stably and continuously.SOLUTION: A beverage server 10 of one embodiment comprises: a housing 11 for storing cooling water W for cooling beer; a beer coil 12 which is immersed in the cooling water W and through which beer passes; an agitation member 22 for agitating cooling water W by rotation; a motor 23 for rotating the agitation member 22; a temperature sensor 24 for detecting temperature of the cooling water W; and a control part 30 for controlling the motor 23. The control part 30 controls the motor 23 so that, when temperature of the cooling water W detected by the temperature sensor 24 rises by first temperature in a first period, rotation speed of the agitation member 22 is increased.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a beverage server used when providing a beverage.

  Various techniques relating to a beverage server are known. Japanese Patent Application Laid-Open No. 2012-86883 discloses a machine body that stores cooling water and is formed in a rectangular box shape, a helical tube that is immersed in the cooling water in the machine body and through which beverages circulate, and cooling water in the machine body. A beverage cooling dispenser including a refrigerant evaporation pipe to be cooled, an agitator for agitating cooling water, and an agitation motor for driving the agitator is described.

  The dispenser further includes a dispensing nozzle for dispensing the beverage that has passed through the spiral tube and attached to the wall surface of the machine body, and an proximity sensor provided on the wall surface of the machine body above the dispensing nozzle. Yes. The agitation motor described above is ON / OFF controlled by the detection signal of the proximity sensor. The approach sensor outputs a high-speed operation signal to the agitation motor when the approach of a person or the like is detected, and outputs a low-speed operation signal to the agitation motor when no approach of a person or the like is detected. The agitation motor sets the rotation speed of the agitator at a high speed when a high-speed operation signal is input, and sets the rotation speed of the agitator at a low speed when a low-speed operation signal is input. Thus, in the above-mentioned dispenser, power consumption is reduced by switching the rotational speed of the stirrer.

JP 2012-88683 A

  In the beverage server described above, the coolant in the machine body is cooled using the refrigerant evaporation tube, and the beverage in the spiral tube is cooled accordingly. However, when the beverage is dispensed from the beverage server, the beverage having a temperature close to room temperature circulates in the spiral tube, so the temperature of the coolant rises. Therefore, the temperature of the cooling liquid rises during continuous dispensing of the beverage, thereby causing a problem that the beverage is not sufficiently cooled. That is, there is a problem that the beverage cannot be sufficiently cooled during continuous dispensing of the beverage, and the low-temperature beverage cannot be stably and continuously provided.

  The present invention proposes a beverage server that can provide a low-temperature beverage stably and continuously.

  A beverage server according to the present invention includes a housing that contains a cooling liquid that cools a beverage, a beverage pipe that is immersed in the cooling liquid and through which the beverage passes, a stirring member that stirs the cooling liquid by rotation, and a stirring member A motor that rotates, a temperature sensor that detects a temperature of the coolant, and a controller that controls the motor, wherein the controller detects that the temperature of the coolant detected by the temperature sensor is increased by a first temperature during a first time period. In this case, the motor is controlled so as to increase the rotation speed of the stirring member.

  According to this beverage server, when the beverage circulates in the beverage pipe when the beverage is dispensed and the temperature of the cooling liquid rises accordingly, the control unit controls the motor so as to increase the rotation speed of the stirring member. That is, the control unit performs control to increase the rotation speed of the stirring member when the beverage is dispensed and the temperature of the coolant rises for the first time during the first time. Therefore, since the efficiency of heat exchange between the cooling liquid and the beverage in the beverage pipe can be increased by increasing the rotational speed of the stirring member as the beverage is dispensed, the beverage can be dispensed even during continuous beverage dispensing. Can continue to cool sufficiently. Therefore, a low temperature beverage can be provided stably and continuously. In addition, since the control unit switches the rotation speed based on the temperature of the coolant detected by the temperature sensor, more appropriate speed control according to the temperature of the coolant is possible.

  Further, the control unit may control the motor so as to slow down the rotation speed of the stirring member when the temperature of the coolant detected by the temperature sensor drops by the second temperature in the second time. In this case, the rotation speed of the stirring member is decreased when the temperature of the coolant drops by the second temperature in the second time. That is, when the beverage is not poured out and the beverage is not distributed in the beverage pipe, the control unit controls the motor so as to slow down the rotation speed of the stirring member. Therefore, when the beverage is not being dispensed, the rotation speed of the agitating member is slowed to suppress wasteful power consumption and to suppress the ice in the housing from melting by suppressing heat exchange. it can.

  In addition, the control unit controls the motor so as to slow down the rotation speed of the stirring member after a predetermined time has elapsed after the temperature of the coolant detected by the temperature sensor has not increased for the second time. You may control. In this case, the state in which the temperature of the coolant does not rise in the second time in the second time continues and the rotation speed of the stirring member is reduced after a predetermined time has elapsed, so that the beverage is poured out as described above. When the beverage is not circulating in the beverage tube, the rotation speed of the stirring member becomes slow. Therefore, the same effect as described above can be obtained.

  A plurality of first times and first temperatures may be set. In this case, whether or not the temperature of the coolant has increased by the first temperature in the first time is determined a plurality of times, and the temperature state of the coolant is determined in a plurality of stages. Therefore, the temperature of the coolant can be determined more accurately and the state of the coolant temperature can be grasped more accurately, so that the rotation speed of the stirring member can be switched with higher accuracy. A plurality of second times and second temperatures may be set. Also in this case, the rotational speed of the stirring member can be switched with higher accuracy as described above.

  The motor described above may be a DC motor. By the way, as a motor as described above generally used in a beverage server, an AC motor has been used in order to obtain a constant rotational speed according to the frequency. However, when the rotational speed is changed using an AC motor, it is necessary to control the rotational speed by changing the frequency with an inverter, so that an inverter or the like needs to be separately arranged. Thus, when an AC motor is used, since it is necessary to arrange | position an inverter etc. in a drink server together, we are anxious about the enlargement of a drink server. On the other hand, when a DC motor is used as described above, it is not necessary to arrange an inverter or the like, so that an increase in size of the beverage server can be avoided. Further, the DC motor can easily change the rotation speed according to the voltage and can stabilize the rotation characteristics, so that the cooling liquid can be stirred more easily and with high accuracy.

  The stirring member has a rotating shaft extending in the vertical direction in the housing and a blade that is immersed in the cooling liquid and rotates together with the rotating shaft, and the temperature sensor may be provided above or below the blade. Good. When the stirring member rotates about the rotation axis, the coolant flows in the direction in which the rotation axis extends. Moreover, since the rotating shaft extends in the vertical direction, the coolant flows in the vertical direction with the rotation of the blades around the rotating shaft. On the other hand, since the temperature sensor is provided above or below the blades, the coolant that has flowed due to the rotation of the blades directly hits the temperature sensor. Therefore, since the temperature of the stirred coolant can be directly detected by the temperature sensor, the temperature of the coolant can be detected more appropriately.

  Moreover, the housing | casing may be comprised with the vacuum heat insulating material. As described above, when the vacuum heat insulating material is used as the casing, the transmission of the cold heat to the outside of the casing can be more reliably interrupted, so that the low temperature state of the coolant can be more reliably maintained. Further, when a vacuum heat insulating material is used as the casing, the casing can be made thin while maintaining the cooling performance of the coolant. Therefore, since the internal capacity of the housing can be increased without increasing the size of the housing, more cooling liquid can be accommodated and more ice can be generated in the housing. Therefore, since the cooling capacity with respect to a drink can be raised, a low temperature drink can be continued for a long time.

  In addition, the stirring member has a rotating shaft extending in the vertical direction in the casing, and a blade that is immersed in the coolant and rotates together with the rotating shaft, and four or more blades are connected to the rotating shaft. Also good. By providing four or more blades in this manner, the propulsive force of the blades can be increased, and the efficiency of heat exchange between the cooling liquid and the beverage can be further increased by the rotation of the stirring member. Therefore, the low temperature state of the beverage can be more reliably maintained even during the continuous dispensing of the beverage, and the low temperature beverage can be continuously provided more stably.

  According to the present invention, a low-temperature beverage can be provided stably and continuously.

It is a figure which shows the structure of the drink provision apparatus provided with the drink server which concerns on 1st Embodiment. It is a figure which shows the structure of the drink server of FIG. It is a figure which shows the cross section of the housing | casing in the drink server of FIG. (A) is a perspective view which shows the stirring member of the drink server of FIG. (B) is a side view which shows the rotating shaft and blade | wing in the stirring member of (a). (A) is the graph which showed the temperature of the cooling water at the time of the drink extraction of the drink server of FIG. 1 in time series. (B) is a graph which shows the temperature change of cooling water when the drink extraction of the drink server of FIG. 1 is performed. It is a figure which shows the structure which performs thickness control of the ice produced | generated by a refrigerant pipe. It is a flowchart which shows the adjustment method of the rotational speed of the stirring member in the drink server which concerns on 1st Embodiment. It is a flowchart which shows the adjustment method of the rotational speed of the stirring member in the drink server which concerns on 2nd Embodiment. It is a graph which shows the temperature of the drink at the time of the continuous extraction in an Example and a comparative example.

(First embodiment)
Hereinafter, a beverage server according to an embodiment will be described with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 shows an overall configuration of a beverage providing device 1 including a beverage server 10 according to the embodiment. The beverage providing device 1 is, for example, a device provided in a restaurant and dispenses beverages from the currant 9 according to customer orders. Here, as the beverage, alcoholic beverages such as beer and happoshu, and beverages not containing alcohol are also included. In the present embodiment, an example in which the beverage server 10 provides beer will be described. The beverage providing apparatus 1 includes, for example, a carbon dioxide cylinder 2, a pressure reducing valve 3, a carbon dioxide hose 4, a beer barrel 5, a head 6, a beer hose 7, a currant 9, and a beverage server 10.

  The carbon dioxide cylinder 2 is a substantially cylindrical container filled with carbon dioxide at a high pressure. The carbon dioxide gas cylinder 2 has a function of pushing out the beer liquid inside the beer barrel 5 to the beverage server 10 and a function of appropriately maintaining the amount of carbon dioxide contained in the beer liquid inside the beer barrel 5. The carbon dioxide cylinder 2 includes a remaining amount indicator 2a that displays the amount of carbon dioxide inside the cylinder. The pressure reducing valve 3 adjusts the pressure of the carbon dioxide gas applied to the beer liquid inside the beer barrel 5. The pressure reducing valve 3 includes a residual pressure indicator 3 a that displays the residual pressure of the carbon dioxide gas in the carbon dioxide cylinder 2 and a rotary operation unit 3 b for adjusting the pressure.

  The beer barrel 5 is a container filled with beer liquid. For example, a card-like liquid temperature detector 5a can be attached to the surface of the beer barrel 5, and the temperature of the beer in the beer barrel 5 can be detected by the liquid temperature detector 5a. . Moreover, the beer barrel 5 includes a tube 5b and a cap 5c through which beer liquid circulates.

  The head 6 has an operation handle 6a capable of opening and closing a flow path of carbon dioxide gas and beer liquid by moving up and down, a gas joint 6b connected to the carbon dioxide hose 4, and a beer joint 6c connected to the beer hose 7. It has. The gas joint 6b and the beer joint 6c are detachable from the main body 6d extending vertically at the center of the head 6.

  The beverage server 10 is connected to the head 6 via the beer hose 7, and cools the beer liquid sent from the beer barrel 5 via the head 6 and the beer hose 7. For example, the beverage server 10 is an electric cooling instantaneous cooling server. The beverage server 10 has a rectangular parallelepiped shape, and the beer hose 7 enters the upper end of the side surface of the beverage server 10. The beer liquid cooled by the beverage server 10 is poured out from the currant 9 when the currant 9 is drawn.

  As shown in FIGS. 1 and 2, the beverage server 10 includes a rectangular parallelepiped housing 11 that contains cooling water (cooling liquid) W, a beer hose 7 that is connected to the cooling water W, and a spiral. The beer coil (beverage pipe) 12 formed in the shape and the refrigeration cycle apparatus 15 that cools the cooling water W are provided.

  The beer coil 12 extends downward in the water tank 11a from the connection portion with the beer hose 7, extends spirally around the axis L from its lower end, and is drawn upward from the cooling water W at the upper end portion extending spirally. Is connected to Karan 9. The axis L is, for example, a reference line extending in the vertical direction at the central portion of the housing 11 in plan view.

  FIG. 3 is a sectional view showing a transverse section of the housing 11. As shown in FIG. 3, the housing 11 includes a water tank 11a, a vacuum heat insulating layer 11b, a foamed urethane layer 11c, and a film layer 11d in order from the inside. The water tank 11a has a waterproof function, and the cooling water W is accommodated in the water tank 11a. The vacuum heat insulating layer 11b is configured by bonding four plate-like vacuum heat insulating materials 11e. The four vacuum heat insulating materials 11e are affixed on the outer surface of the water tank 11a. Thus, the vacuum heat insulating layer 11b is in close contact with the outer surface of the water tank 11a.

  The urethane foam layer 11c is provided so as to surround the vacuum heat insulating layer 11b outside the vacuum heat insulating layer 11b in plan view. The film layer 11d is affixed to the outer surface of the urethane foam layer 11c. The casing 11 is made by pouring a stock solution of urethane foam between the inner surface of a rectangular parallelepiped mold having the film layer 11d attached to the inner surface and the outer surface of the vacuum heat insulating layer 11b disposed inside the mold. The stock solution is produced by foaming and curing to form a foamed urethane layer 11c. In addition, if the film layer 11d is transparent, the urethane foam layer 11c can be visually recognized from the outside. Moreover, the SUS material which is the exterior material of the drink server 10 is provided in the outer side of the film layer 11d.

  Moreover, about the beer coil 12 shown by FIG.1 and FIG.2, the shape is not restricted helically, It can change suitably. However, when the beer coil 12 is spiral, the flow path of the beer liquid in the cooling water W can be secured long, so that the beer liquid inside the beer coil 12 is more contained in the beverage server 10. The instantaneous cooling can be suitably performed.

  The refrigeration cycle apparatus 15 includes a refrigerant pipe 16 that extends spirally so as to surround the beer coil 12 outside the beer coil 12 in the cooling water W. Further, the refrigeration cycle apparatus 15 includes a compressor 17, a condenser 18, a fan 19, a dehydrator 20, and a capillary tube 21. The refrigeration cycle apparatus 15 constitutes a refrigeration cycle in which a refrigerant pipe 16, a compressor 17, a condenser 18, a dehydrator 20, and a capillary tube 21 are connected in order.

  The compressor 17 compresses the refrigerant flowing from the refrigerant pipe 16 to generate a high-temperature refrigerant gas, and the condenser 18 releases heat from the high-temperature refrigerant gas, so that the condenser 18 generates a high-temperature refrigerant liquid. The fan 19 has a function of sending air to the condenser 18 and efficiently exchanging heat in the condenser 18. The high-temperature refrigerant liquid generated by the condenser 18 is sent to the capillary tube 21 via the dehydrator 20. The capillary tube 21 performs pressure reduction and flow rate control on the high-temperature refrigerant liquid sent via the dehydrator 20 to generate a refrigerant of, for example, −8 ° C., and supplies this refrigerant to the refrigerant tube 16.

  Furthermore, the beverage server 10 includes a stirring member 22 and a motor 23. The stirring member 22 is, for example, a propeller, and stirs the cooling water W in the housing 11 to form a flow in the cooling water W, thereby exchanging heat between the cooling water W and the beer coil 12, and cooling water W and refrigerant. The heat exchange with the ice K formed around the tube 16 is promoted.

  As shown in FIG. 4A, the agitating member 22 includes a rod-like rotating shaft 22a extending in the vertical direction and four blades 22b attached to the lower end of the rotating shaft 22a. The position of the rotating shaft 22a coincides with the position of the axis L described above, for example. The four blades 22b extend radially from the rotation shaft 22a. The four blades 22b are arranged at equal intervals in the rotation direction (circumferential direction) of the rotation shaft 22a. Further, the shape of each blade 22b in plan view is a shape curved in an arc shape from the rotation shaft 22a.

  FIG. 4B is a diagram showing a single blade 22b and a rotating shaft 22a when FIG. 4A is viewed from the direction of arrow A. FIG. As shown in FIG. 4B, the blade 22b is inclined so as to form a predetermined angle with respect to the surface S orthogonal to the rotation shaft 22a. That is, each blade 22b is inclined along the rotation axis 22a, and the inclination angle θ of the blade 22b with respect to the surface S orthogonal to the rotation shaft 22a is, for example, 15 ° or more and 45 ° or less. In addition, the inclination angle θ is preferably 20 ° or more and 40 ° or less, and more preferably 25 ° or more and 35 ° or less. However, the value of the inclination angle θ is not limited to the above and can be changed as appropriate.

  As shown in FIG. 2, a motor 23 is connected to the upper end of the rotating shaft 22 a of the stirring member 22. The motor 23 is disposed above the beer coil 12, and a rotating shaft 22 a attached to the motor 23 enters the inside of the beer coil 12. Therefore, the cooling water W located inside the beer coil 12 moves downward by the rotation of the stirring member 22, and forms a flow that moves outward in the housing 11 at the bottom surface 11 f of the housing 11.

  The motor 23 is a DC motor. The motor 23 is controlled by a control unit 30 electrically connected to the motor 23. Specifically, the rotational speed of the motor 23 is controlled by an electrical signal from the control unit 30 and is variable depending on the voltage of the electrical signal input to the motor 23.

  A temperature sensor 24 that detects the temperature of the cooling water W is provided vertically below the blade 22 b of the stirring member 22. For example, the temperature sensor 24 is fixed to the bottom surface 11 f of the housing 11. In plan view, the temperature sensor 24 is arranged at the center of the beer coil 12, that is, at a position including the axis L. The temperature value of the cooling water W detected by the temperature sensor 24 is output to the control unit 30 as an electrical signal.

  Fig.5 (a) is a graph which shows the time-sequential change of the temperature of the cooling water W when beer is continuously poured out from the drink server 10 (curran 9). As shown in FIG. 5 (a), the temperature of the cooling water W rises every time beer is poured out. This is because the beer liquid that has been close to room temperature flows into the beer coil 12 from the beer hose 7 as beer is poured out. Further, when beer pouring is stopped, the temperature of the cooling water W decreases due to the cooling effect of the ice K formed around the refrigerant pipe 16.

  The control unit 30 controls the motor 23 according to the value of the temperature of the cooling water W input from the temperature sensor 24, thereby switching the rotation speed of the motor 23 (stirring member 22). That is, the control unit 30 switches the rotation speed of the motor 23 to the low speed mode or the high speed mode. As shown in FIG. 1, the beverage server 10 includes a display unit 25 at the corner of the upper end of the outer surface where the currant 9 is provided, and the display unit 25 displays the state of the rotational speed of the motor 23. Is done.

  The display unit 25 displays whether the mode is the low speed mode or the high speed mode. Therefore, by visually recognizing the display unit 25, it is possible to grasp whether the current state is the low speed mode or the high speed mode. In addition, the position where the display part 25 is provided should just be a position which the display part 25 can visually recognize, and can be changed suitably.

  As shown in FIG. 5B, the control unit 30 switches to the high speed mode when the temperature detected by the temperature sensor 24 rises by the first temperature X1 (° C.) during the first time t1 (s). For example, the first time t1 can be 6 (s), and the first temperature X1 can be 0.3 (° C.).

  As described above, when the temperature of the cooling water W rises by the first temperature X1 at the first time t1, the control unit 30 determines that beer is being poured out and drives the motor 23 in the high speed mode. Thereby, the stirring member 22 rotates at high speed. The rotation speed of the motor 23 in the high speed mode can be set to 2700 (rpm), for example.

  The rotational speed of the motor 23 of 2700 (rpm) is smaller than the rotational speed of the conventional AC motor (the rotational speed of the conventional AC motor is 2750 (rpm), for example). Thus, by reducing the rotation speed of the motor 23, it is possible to avoid problems that the bearing is worn out, the rotation of the motor 23 becomes unstable, and the cooling water W splashes.

  On the other hand, the control unit 30 switches to the low speed mode when the temperature detected by the temperature sensor 24 falls for the second time X2 (° C.) during the second time t2 (s). The rotation speed of the motor 23 in the low speed mode can be set to 1200 (rpm), for example. However, the number of rotations can be changed as appropriate, and the number of rotations of the motor 23 in the low speed mode may be smaller than the number of rotations of the motor 23 in the high speed mode.

  When the temperature of the cooling water W drops by the second temperature X2 at the second time t2, the control unit 30 determines that beer is not being dispensed and drives the motor 23 in the low speed mode. Thereby, the stirring member 22 rotates at a low speed. For example, the second time t2 can be 20 (s), and the second temperature X2 can be 0.3 (° C.). Further, the values of the first time t1, the first temperature X1, the second time t2, and the second temperature X2 described above can be changed as appropriate. However, the value of the second time t2 is preferably larger than the value of the first time t1. Thereby, when switching from the high speed mode to the low speed mode, it is possible to perform the switching after confirming that the temperature of the cooling water W has not increased. As will be described in detail later, a plurality of first times t1, first temperatures X1, second times t2, and second temperatures X2 can be set.

  Further, instead of the above-mentioned condition “when the temperature of the cooling water W decreases by the second temperature X2 at the second time t2,” “the temperature of the cooling water W does not increase by the second temperature X2 at the second time t2. The condition “when” may be used. In this case, the control unit 30 switches to the low speed mode when the temperature detected by the temperature sensor 24 has not increased by the second temperature X2 during the second time t2.

  As shown in FIG. 2 and FIG. 6, since the refrigerant is supplied from the capillary tube 21 to the refrigerant pipe 16, the cooling water W around the refrigerant pipe 16 is cooled by this refrigerant. Ice K is generated around It takes about several hours (for example, 7 or 8 hours) from the time when the beverage server 10 is turned on with the cooling water W in the housing 11 until the ice K is generated. Thus, for example, if the beverage server 10 is turned on at the end of business at night in a restaurant, ice K is generated around the refrigerant pipe 16 at night, and the ice K is generated by the start of business on the next day. It can be in a completed state.

  Further, a sensor 31 for adjusting the thickness of the ice K is provided inside the housing 11. The sensor 31 protrudes from the inner side surface 11 g of the housing 11 to the inside of the housing 11. The sensor 31 includes two rod-shaped electrodes 32 and 33, and the lengths of these electrodes 32 and 33 are different from each other.

  The sensor 31 detects the thickness of the ice K by detecting conduction or non-conduction between the electrode 32 and the electrode 33. Specifically, the sensor 31 detects that the thickness of the ice K is thin when the tip 32a of the electrode 32 and the tip 33a of the electrode 33 are in contact with the cooling water W and are conducted. On the other hand, the sensor 31 detects that the thickness of the ice K is thick when the tip 32a of the electrode 32 is buried in the ice K and the tip 32a and the tip 33a are non-conductive.

  When the sensor 31 detects that the ice K is thin, the control unit 30 supplies the refrigerant to the refrigerant pipe 16 by the refrigeration cycle device 15 and cools the refrigerant pipe 16 to make the ice K thick. Take control. On the other hand, when the sensor 31 detects that the ice K is thick, the control unit 30 stops the supply of the refrigerant to the refrigerant pipe 16 by the refrigeration cycle device 15 so that the ice K does not become thicker than this. Control. In the sensor 31, the thickness of the ice K generated around the refrigerant pipe 16 can be controlled by adjusting the positions of the two electrodes 32 and 33.

  Next, an example of a cooling method for adjusting the temperature of the cooling water W and cooling the beer liquid in the beer coil 12 will be described with reference to FIGS. 5 and 7. The flowchart shown in FIG. 7 shows an example of a method for cooling beer by the beverage server 10, and each process in this flowchart is performed periodically (for example, every 1 (s) after the beverage server 10 is turned on. ) Is executed. In the process of this flowchart, for example, the temperature of the cooling water W is constantly monitored in a state where the power of the beverage server 10 is on.

  In the cooling method shown in FIG. 7, a plurality of the first time t1 and the first temperature X1 are set, and the plurality of first times t1 are set as the first time t1-1 and the first time t1. −2 and a plurality of first temperatures X1 set as a first temperature X1-1 and a first temperature X1-2.

  First, in step S1, the control unit 30 sets the low speed mode and drives the motor 23 in the low speed mode. And the control part 30 determines whether the temperature of the cooling water W rose 1st temperature X1-1 at 1st time t1-1 (step S2). For example, the first time t1-1 is 3 (s), and the first temperature X1-1 is 0.2 (° C.). As a result of the determination in step S2, when it is determined that the first temperature X1-1 has increased, the rotation of the motor 23 is switched to the high speed mode (step S3). Then, the accumulated time that is the time since the start of the series of processes is reset (step S4), and the process returns to step S2.

  On the other hand, if it is determined in step S2 that the first temperature X1-1 has not risen, the process proceeds to step S5. In step S5, the control unit 30 determines whether or not the temperature of the cooling water W has increased by the first temperature X1-2 at the first time t1-2. For example, the first time t1-2 is 6 (s), and the first temperature X1-2 is 0.2 (° C.). If it is determined in step S5 that the first temperature X1-2 has increased, the process proceeds to step S3, and the rotation of the motor 23 is switched to the high speed mode. On the other hand, if it is determined in step S5 that the first temperature X1-2 has not increased, the process proceeds to step S6.

  In step S6, the control unit 30 determines whether or not the above-mentioned accumulated time has passed a predetermined time. This predetermined time is, for example, 30 (s). If it is determined in step S6 that the accumulated time has passed the predetermined time, it is determined that beer has not been poured out, the process proceeds to step S1, and the mode is switched to the low speed mode. On the other hand, if it is determined that the accumulated time has not passed the predetermined time, the process proceeds to step S2.

  Then, the effect of the drink server 10 which concerns on 1st Embodiment is demonstrated.

  According to this beverage server 10, when the beer liquid circulates in the beer coil 12 when beer is dispensed, and the temperature of the cooling water W rises accordingly, the control unit 30 increases the rotation speed of the stirring member 22. Thus, the motor 23 is controlled. That is, the control unit 30 performs control to increase the rotation speed of the agitating member 22 when beer is poured and the temperature of the cooling water W is increased by the first temperature X1 during the first time t1.

  Therefore, by increasing the rotational speed of the agitating member 22 with the beer being dispensed, the water flow of the cooling water W can be strengthened to increase the efficiency of heat exchange between the cooling water W and the beer liquid in the beer coil 12. it can. Therefore, even at the time of continuous pouring of beer, the beer can be sufficiently cooled, and low temperature beer can be provided stably and continuously. Moreover, since the control part 30 switches rotation speed based on the temperature of the cooling water W detected by the temperature sensor 24, more appropriate temperature control according to the temperature of the cooling water W is possible.

  Further, as shown in FIG. 7, the control unit 30 continues the state in which the temperature of the cooling water W detected by the temperature sensor 24 has not increased by the first temperature X1 at the first time t1, and a predetermined time has elapsed. The motor 23 is controlled so as to slow down the rotation speed of the stirring member 22 later. Accordingly, the state in which the temperature of the cooling water W has not increased at the first temperature X1 at the first time t1 continues and the rotation speed of the agitating member 22 is reduced after a predetermined time has elapsed. When the beer is not circulating in the beer coil 12, the rotation speed of the stirring member 22 is slow. Therefore, when the beer is not being poured out, the rotation speed of the agitating member 22 is slowed down to suppress unnecessary power consumption and to prevent the ice K in the casing 11 from melting by suppressing heat exchange. Can be suppressed.

  Further, as described above, a plurality of first times t1 and first temperatures X1 are set (first time t1-1, first time t1-2, first temperature X1-1, first temperature X1). -2). Therefore, it is determined whether or not the temperature of the cooling water W has increased by the first temperature X1 at the first time t1, and the temperature state of the cooling water W is determined in a plurality of stages. Therefore, since the temperature of the cooling water W can be determined with higher accuracy and the temperature state of the cooling water W can be grasped more accurately, the rotation speed of the stirring member 22 can be switched with higher accuracy.

  The motor 23 is a DC motor. Conventionally, as this type of motor, an AC motor is generally used in order to obtain a constant rotational speed corresponding to the frequency. When an AC motor is used, it is necessary to arrange an inverter or the like together. Therefore, in the present embodiment, since a DC motor is used as the motor 23, it is not necessary to arrange an inverter or the like, and an increase in size of the beverage server 10 can be avoided. In addition, since the DC motor can easily change the rotation speed according to the voltage and can also stabilize the rotation characteristics, the cooling water W can be stirred more easily and with high accuracy.

  The agitating member 22 has a rotating shaft 22a extending in the vertical direction in the casing 11, and a blade 22b that is immersed in the cooling water W and rotates together with the rotating shaft 22a. It is provided below. When the stirring member 22 rotates around the rotation shaft 22a, the cooling water W flows in the direction in which the rotation shaft 22a extends. Moreover, since the rotating shaft 22a is extended in the up-down direction, the cooling water W will flow below with rotation of the blade | wing 22b centering on the rotating shaft 22a. On the other hand, since the temperature sensor 24 is provided below the blades 22b, the cooling water W that has flowed due to the rotation of the blades 22b directly contacts the temperature sensor 24. Accordingly, since the temperature of the stirred cooling water W can be directly detected by the temperature sensor 24, the temperature of the cooling water W can be detected more appropriately.

  Moreover, the housing | casing 11 is comprised by the vacuum heat insulating material 11e. Thus, since the vacuum heat insulating material 11e is used as the housing | casing 11, transmission of the cold heat to the exterior of the housing | casing 11 can be interrupted | blocked still more reliably. Therefore, the low temperature state of the cooling water W can be maintained more reliably. Moreover, when the vacuum heat insulating material 11e is used as the housing | casing 11, the housing | casing 11 can be made thin, maintaining the cooling performance of the cooling water W. FIG.

  Therefore, since the internal capacity of the housing 11 can be increased without increasing the size of the housing 11, more cooling water W can be accommodated and more ice K is generated in the housing 11. You can also Therefore, since the cooling capability with respect to a beer liquid can be improved, a low temperature beer can be provided for a long time.

  The agitating member 22 has a rotating shaft 22a extending in the vertical direction in the casing 11, and a blade 22b that is immersed in the cooling water W and rotates together with the rotating shaft 22a. The rotating shaft 22a includes four pieces. Are connected to each other. By providing the four blades 22b as described above, the propulsive force of the blades 22b can be increased, so that the efficiency of heat exchange between the cooling water W and the beer liquid can be further increased by the rotation of the stirring member 22. Therefore, even during the continuous pouring of beer, the low temperature state of the beer liquid can be more reliably maintained, and the low temperature beer can be continuously provided more stably.

  Each blade 22b of the stirring member 22 is inclined so as to form a predetermined inclination angle θ with respect to the surface S orthogonal to the rotation shaft 22a. Since the propulsive force of the blades 22b can be increased by inclining the blades 22b in this manner, it is possible to continue providing low-temperature beer more stably and continuously for the same reason as described above.

(Second Embodiment)
Next, a beverage server according to the second embodiment will be described. In the following description, the description overlapping with the first embodiment is omitted. The beverage server according to the second embodiment is the same in configuration as the beverage server 10 according to the first embodiment, and only the control content is different from the beverage server 10. Below, the example of 2nd Embodiment of the cooling method which adjusts the temperature of the cooling water W and cools beer liquid is demonstrated, referring FIG. Each process in the flowchart of FIG. 8 is also periodically executed after the beverage server is turned on.

  In the cooling method shown in FIG. 8, in addition to the first time t1 and the first temperature X1, a plurality of second times t2 and second temperatures X2 are set. Hereinafter, the plurality of second times t2 set as the second time t2-1, the second time t2-2, and the second time t2-3, and the plurality of second temperatures X2 set as the second temperature t2. X2-1, second temperature X2-2, and second temperature X2-3.

  First, in step S11, the control unit 30 sets the low speed mode and drives the motor 23 in the low speed mode. And the control part 30 determines whether the temperature of the cooling water W rose 1st temperature X1-1 at 1st time t1-1 (step S12). As a result of this determination, when it is determined that the first temperature X1-1 has increased, the rotation of the motor 23 is switched to the high speed mode (step S13).

  On the other hand, if it is determined in step S12 that the first temperature X1-1 has not risen, the process proceeds to step S14. In step S14, the control unit 30 determines whether or not the temperature of the cooling water W has increased by the first temperature X1-2 at the first time t1-2. If it is determined in step S14 that the first temperature X1-2 has increased, the process proceeds to step S13 to switch the rotation of the motor 23 to the high speed mode. On the other hand, if it is determined in step S14 that the first temperature X1-2 has not increased, the process proceeds to step S15.

  In step S15, the control unit 30 determines whether or not the temperature of the cooling water W has increased by the first temperature X1-3 at the first time t1-3. For example, the first time t1-3 is 20 (s), and the first temperature X1-3 is 0.3 (° C.). If it is determined in step S15 that the first temperature X1-3 has increased, the process proceeds to step S13. On the other hand, if it is determined in step S15 that the first temperature X1-3 has not risen, it is determined that beer has not been poured out and the process proceeds to step S11 to switch to the low speed mode. Do.

  In addition, after the switching to the high speed mode is performed in step S13, the control unit 30 determines whether or not the temperature of the cooling water W has decreased by the second temperature X2-1 at the second time t2-1 ( Step S16). For example, the second time t2-1 is 3 (s) and the second temperature X2-1 is 0.2 (° C.). As a result of the determination in step S16, when it is determined that the second temperature X2-1 has decreased, the rotation of the motor 23 is switched to the low speed mode (step S11).

  On the other hand, if it is determined in step S16 that the second temperature X2-1 has not decreased, the process proceeds to step S17. In step S17, the control unit 30 determines whether or not the temperature of the cooling water W has decreased by the second temperature X2-2 at the second time t2-2. The second time t2-2 is, for example, 12 (s), and the second temperature X2-2 is 0.2 (° C.).

  If it is determined in step S17 that the second temperature X2-2 has decreased, the process proceeds to step S11, and the rotation of the motor 23 is switched to the low speed mode. On the other hand, if it is determined in step S17 that the second temperature X2-2 has not decreased, the process proceeds to step S18. In step S18, the control unit 30 determines whether or not the temperature of the cooling water W has decreased by the second temperature X2-3 at the second time t2-3. For example, the second time t2-3 is 20 (s), and the second temperature X2-3 is 0.2 (° C.). If it is determined in step S18 that the second temperature X2-3 has decreased, the control unit 30 switches the rotation speed of the motor 23 to the low speed mode. On the other hand, if it is determined in step S18 that the second temperature X2-3 has not decreased, the process proceeds to step S16.

  Next, the effects of the beverage server according to the second embodiment will be described.

  According to the beverage server of the second embodiment, as in the first embodiment, the control unit 30 pours beer and the temperature of the cooling water W increases by the first temperature X1 during the first time t1. In this case, since the control for increasing the rotation speed of the stirring member 22 is performed, the same effect as that of the first embodiment can be obtained.

  Further, the control unit 30 controls the motor 23 so as to slow down the rotation speed of the stirring member 22 when the temperature of the cooling water W detected by the temperature sensor 24 decreases by the second temperature X2 at the second time t2. Therefore, when the temperature of the cooling water W2 falls at the second temperature X2 at the second time t2, the rotation speed of the stirring member 22 is decreased. Therefore, when the beverage is not poured out and the beer is not distributed in the beer coil 12, the control unit 30 controls the motor 23 to slow down the rotation speed of the stirring member 22. Therefore, when the beer is not being poured out, the rotation speed of the stirring member 22 is slowed down to suppress unnecessary power consumption and to prevent the ice K in the casing 11 from melting by suppressing heat exchange. It can also be suppressed.

  In addition, as described above, the control unit 30 determines that the temperature of the cooling water W detected by the temperature sensor 24 has not increased in the second time X2 at the second time t2, and after the predetermined time has elapsed, The motor 23 may be controlled so as to slow down the rotation speed of the motor 22. In this case, the rotation speed of the agitating member 22 is reduced after a predetermined time has elapsed since the temperature of the cooling water W has not increased at the second temperature X2 at the second time t2, so that the beer is the same as described above. When the beer is not poured out and the beer is not circulating in the beer coil 12, the rotation speed of the stirring member 22 is slow. Therefore, the same effect as described above can be obtained.

  A plurality of second times t2 and second temperatures X2 are set (second time t2-1, second time t2-2, second time t2-3, second temperature X2-1, second Temperature X2-2, second temperature X2-3). Therefore, it is determined whether or not the temperature of the cooling water W has decreased by the second temperature X2 at the second time t2, and the temperature state of the cooling water W is determined in a plurality of stages. Therefore, since the temperature of the cooling water W can be determined with higher accuracy and the temperature state of the cooling water W can be grasped more accurately, the rotation speed of the stirring member 22 can be switched with higher accuracy.

上記の式（１）を満たせば、第１時間を固定して第１温度の各値を変化させてもよいし、第１温度を固定して第１時間の各値を変化させてもよい。 7 and 8, in the example described above, the first time t1-1 is 3 (s), the first temperature X1-1 is 0.2 (° C.), and the first time t1-2 is 6 (s), the first temperature X1-2 is 0.2 (° C.), the first time t1-3 is 20 (s), and the first temperature X1-3 is 0.3 (° C.). However, it is not limited to these values. However, it is preferable that it is a value which satisfy | fills following formula (1).

If the above equation (1) is satisfied, the first time may be fixed and the values of the first temperature may be changed, or the first temperature may be fixed and the values of the first time may be changed. .

上記の式（２）を満たせば、第２時間を固定して第２温度の値を変化させてもよいし、第２温度を固定して第２時間の各値を変化させてもよい。 In the above-described example, the second time t2-1 is 3 (s), the second temperature X2-1 is 0.2 (° C.), and the second time t2-2 is 12 (s). Although X2-2 is 0.2 (° C.), the second time t2-3 is 20 (s), and the second temperature X2-3 is 0.2 (° C.), it is not limited to these values. However, it is preferable that it is a value which satisfy | fills following formula (2).

If the above equation (2) is satisfied, the value of the second temperature may be changed by fixing the second time, or each value of the second time may be changed by fixing the second temperature.

  As mentioned above, although each embodiment of the present invention was described, the present invention is not limited to each above-mentioned embodiment, changes in the range which does not change the gist described in each claim, or changes to others. It may be applied. That is, the present invention can be variously modified without changing the gist of each claim. For example, each step of the flowchart of FIG. 7 or each step of the flowchart of FIG. It can be changed as appropriate.

  For example, in the above-described embodiment, the high-speed mode and the low-speed mode are provided, and the temperature of the cooling water W is switched to the high-speed mode when the temperature of the cooling water W rises by the first temperature X1 at the first time t1. In the above description, the example of switching to the low speed mode when the second temperature X2 decreases at the second time t2 has been described.

  However, in addition to the high speed mode and the low speed mode described above, an ultra low speed mode may be further provided. In this case, for example, as shown in FIG. 5B, after the temperature of the cooling water W has decreased by the second temperature X2 at the second time t2 and switched to the low speed mode, the control unit 30 further It is determined whether or not the temperature of the temperature has decreased by the third temperature in the third time. This third time may be longer than the second time t2, such as 30 minutes or 1 hour. And the control part 30 switches to super low speed mode, when it determines with the temperature of the cooling water W falling 3rd temperature in 3rd time. The rotation speed of the motor 23 in the ultra-low speed mode can be set to 900 (rpm), for example.

  When the ultra-low speed mode is provided in this way, when the beer has not been poured out for a long time because the business hours have ended or the like, and the beer has not been circulated in the beer coil 12 for a long time, the control unit 30 The motor 23 is controlled so as to further reduce the rotational speed of the motor 22. Therefore, when the beer is not poured out for a long time, the rotation speed of the agitating member 22 is further slowed down to further reduce wasteful power consumption and to further prevent the ice K from being melted by suppressing heat exchange. Can do.

  Even in the low speed mode or the ultra low speed mode, the rotation of the stirring member 22 is not completely stopped. Therefore, the bias of the temperature distribution of the cooling water W can be suppressed by appropriately rotating the stirring member 22. By suppressing the unevenness of the temperature distribution in this way, accurate temperature measurement can be performed from the start of pouring, and the pouring temperature can be easily set to a desired temperature. As described above, the present invention is not limited to two modes such as the high-speed mode and the low-speed mode, and can include three or more modes.

  In the above-described embodiment, the blade 22b is provided at the lower end of the stirring member 22. However, the position where the blade 22b is provided is not particularly limited and can be appropriately changed. In addition, the shape, arrangement, and number of the blades 22b can be changed as appropriate.

  In the above-described embodiment, the rotating shaft 22a extends downward from the motor 23 positioned on the upper side of the housing 11, the blade 22b is positioned at the lower end of the rotating shaft 22a, and the temperature sensor 24 is positioned below the blade 22b. The example provided in is described. However, the motor may be located on the lower side of the housing 11, the rotation shaft may extend upward from the motor, the blade may be located at the upper end of the rotation shaft, and the temperature sensor may be provided above the blade. . In this manner, the position of the temperature sensor 24 can be changed as appropriate, and an AC motor can be used instead of the motor 23 that is a DC motor.

  In the above-described embodiment, the thickness of the ice K is detected by the sensor 31 having the two electrodes 32 and 33. However, a sensor having a configuration different from that of the sensor 31 may be used.

  Moreover, although the drink server 10 was installed in the drink providing apparatus 1 in the above-described embodiment, the configuration of the drink providing apparatus is not limited to the above-described embodiment, and can be changed as appropriate. Furthermore, the configuration of the refrigeration cycle apparatus can be changed as appropriate.

(Example)
Next, when the beer was poured out using the example in which the temperature change of the beer when the beer was poured out using the beverage server 10 according to this embodiment was verified, and the conventional beverage server The comparative example which verified the temperature change etc. of beer in is demonstrated. First, in the beverage server according to the embodiment, as described above, when the temperature of the cooling water W rises by the first temperature X1 at the first time t1, the mode is switched to the high speed mode and the temperature of the cooling water W is set to the second time t2. When the second temperature X2 falls, the control to switch to the low speed mode is performed. On the other hand, the drink server which concerns on a comparative example does not perform the above controls, but always rotates a stirring member with a fixed rotational speed.

  Further, the case 11 is used in the examples, and the case having no vacuum heat insulating material is used in the comparative example. And the stirring member of an Example used what has four blade | wings 22b, and used the thing which has two blade | wings as a stirring member of a comparative example.

  As a result of comparing and verifying the above examples and comparative examples, first, as shown in FIG. 3, the case of the example includes the vacuum heat insulating material 11 e, and therefore, compared with the case of the beverage server of the comparative example. Thus, the thickness of the casing is reduced. Therefore, the internal capacity of the housing of the example is larger than that of the comparative example. Specifically, in the case of the comparative example, the vertical length of the case in a plan view was 255 mm, the horizontal length was 255 mm, and the internal capacity was 16 L, whereas in the case of the example, The vertical length of the housing in plan view was 269 mm, the horizontal length was 269 mm, and the internal capacity could be 18 L. In the example, since the internal capacity was larger than that of the comparative example, the amount of the cooling water W was increased by 1.1 L, and the amount of ice K that could be generated was increased by 0.9 L.

  FIG. 9 is a graph showing the temperature change of beer during continuous pouring in Examples and Comparative Examples, assuming 300 summer beer (30 ° C.) and pouring 300 ml of beer from a beverage server to a mug. The temperature of the beer poured into the mug after 1 minute (assuming the time until it is provided to the customer) is shown. In addition, although the horizontal axis of the graph of FIG. 9 has shown the number of beer cups (what number of containers) at the time of continuous pouring, beer is poured into each container every 15 seconds.

  As shown in FIG. 9, in the beverage server of the comparative example, when beer was continuously poured out, the temperature of the beer became about 7.0 ° C. at the time of the tenth cup. On the other hand, in an Example, the temperature of beer is less than 5.5 degreeC also at the time of the 10th cup. Thus, in the Example using the drink server 10, it turned out that it can continue providing low temperature beer for a long time, without changing the magnitude | size of the housing | casing 11. FIG.

DESCRIPTION OF SYMBOLS 1 ... Beverage provision apparatus, 2 ... Carbon dioxide cylinder, 2a ... Remaining amount indicator, 3 ... Pressure reducing valve, 3a ... Residual pressure indicator, 3b ... Operation part, 4 ... Carbon dioxide hose, 5 ... Beer barrel, 5a ... Liquid temperature detection Part, 5b ... tube, 5c ... base, 6 ... head, 6a ... operation handle, 6b ... gas joint, 6c ... beer joint, 6d ... main body part, 7 ... beer hose, 9 ... currant, 10 ... beverage server, 11 ... Case, 11a ... Water tank, 11b ... Vacuum insulation layer, 11c ... Urethane foam layer, 11d ... Film layer, 12 ... Beer coil (beverage pipe), 15 ... Refrigerating cycle device, 16 ... Refrigerant pipe, 17 ... Compressor, 18 ... Condenser, 19 ... fan, 20 ... dehydrator, 21 ... capillary tube, 22 ... stirring member, 22a ... rotating shaft, 22b ... blade, 23 ... motor, 24 ... temperature sensor, 25 ... display unit, 30 ... control unit, 31 ... Sensor, 32, 33 ... electrode, 32a, 33a ... tip, K ... ice, L ... axis, t1 ... first time, t2 ... second time, W ... cooling water, X1 ... first temperature, X2 ... second temperature , Θ: inclination angle.

Claims (9)

A housing for containing a cooling liquid for cooling the beverage;
A beverage tube immersed in the coolant and through which the beverage passes;
A stirring member that stirs the coolant by rotation;
A motor for rotating the stirring member;
A temperature sensor for detecting the temperature of the coolant;
A control unit for controlling the motor,
The controller controls the motor to increase the rotational speed of the agitating member when the temperature of the coolant detected by the temperature sensor rises by a first temperature in a first time;
Beverage server. The controller controls the motor to slow down the rotation speed of the agitating member when the temperature of the coolant detected by the temperature sensor decreases by a second temperature in a second time;
The beverage server according to claim 1. The controller is configured to slow down the rotation speed of the stirring member after a predetermined time has elapsed after the temperature of the coolant detected by the temperature sensor has not risen in the second temperature in the second time. Controlling the motor;
The beverage server according to claim 1. A plurality of both the first time and the first temperature are set.
The beverage server according to any one of claims 1 to 3. A plurality of the second time and the second temperature are both set.
The beverage server according to claim 2 or 3. The motor is a DC motor;
The beverage server according to any one of claims 1 to 5. The stirring member has a rotating shaft extending in the vertical direction in the housing, and a blade that is immersed in the cooling liquid and rotates together with the rotating shaft,
The temperature sensor is provided above or below the blade,
The beverage server according to any one of claims 1 to 6. The housing is constituted by a vacuum heat insulating material,
The beverage server according to any one of claims 1 to 7. The stirring member has a rotating shaft extending in the vertical direction in the housing, and a blade that is immersed in the cooling liquid and rotates together with the rotating shaft,
Four or more blades are connected to the rotating shaft,
The drink server as described in any one of Claims 1-8.

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