CN109427140B - Automatic vending machine - Google Patents
Automatic vending machine Download PDFInfo
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- CN109427140B CN109427140B CN201810705461.7A CN201810705461A CN109427140B CN 109427140 B CN109427140 B CN 109427140B CN 201810705461 A CN201810705461 A CN 201810705461A CN 109427140 B CN109427140 B CN 109427140B
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- prevention control
- commodity storage
- commodity
- freeze prevention
- temperature
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F11/00—Coin-freed apparatus for dispensing, or the like, discrete articles
- G07F11/72—Auxiliary equipment, e.g. for lighting cigars, opening bottles
Abstract
The vending machine includes a control unit configured to: the upper freezing prevention control is performed for preventing the freezing of the commodities stored in the commodity storage by stopping the cooling of the interior of the commodity storage by the refrigerant circuit device based on the outside air temperature detected by the outside air temperature sensor and the temperature of the upper portion in the commodity storage detected by the inside temperature sensor.
Description
Technical Field
The present invention relates to an automatic vending machine, and more particularly to an automatic vending machine including a cooling unit that cools the inside of a product storage to a predetermined temperature.
Background
Conventionally, there is known an automatic vending machine including a cooling unit that cools the interior of a commodity storage room to a predetermined temperature. Such a vending machine is disclosed in, for example, japanese patent laid-open publication No. 2017-058740.
Japanese patent application laid-open No. 2017-058740 discloses the following vending machines: the control device is provided with a cooling unit for cooling the interior of the commodity storage room to a predetermined temperature, and performs cold district control (freeze prevention control) for setting the set value of the cooling temperature of the commodity storage room to a value higher than the set value of the normal cooling temperature, so as to suppress freezing of the commodity due to supercooling in the cold district. In the vending machine disclosed in japanese patent application laid-open No. 2017-058740, the following cold district control is performed: freezing of a commodity at the lower portion of the commodity storage (a next commodity (a commodity to be supplied next)) is suppressed based on a temperature (lower portion) in the commodity storage detected by an in-storage temperature sensor provided at the lower portion in the commodity storage.
However, in the vending machine as disclosed in japanese patent application laid-open No. 2017-058740, the freeze prevention control is performed based on the temperature of the lower portion in the commodity storage room, and therefore, it is conceivable that the temperature of the upper portion in the commodity storage room is not in an appropriate state. Therefore, it is conceivable that there are the following cases: although the lower commodities in the commodity storage are adjusted to a temperature at which freezing can be avoided, the upper commodities in the commodity storage are frozen. Therefore, in the vending machine as disclosed in japanese patent application laid-open No. 2017-058740, the following is conceivable: the freezing of the commodity in the upper part of the commodity storage room deteriorates the quality of the commodity, and causes a loss (disposal loss) due to the disposal of the commodity by breakage of a container of the commodity or the like.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an automatic vending machine capable of suppressing: the freezing of the commodities at the upper portion of the commodity storage room deteriorates the quality of the commodities, and causes the loss of the commodities due to the breakage of the containers of the commodities.
In order to achieve the above object, an automatic vending machine according to an aspect of the present invention includes: a commodity storage box for storing commodities; a cooling unit that cools the interior of the commodity storage compartment to a predetermined temperature; an outside air temperature sensor that detects an outside air temperature; an upper temperature sensor in the storage for detecting the temperature of the upper part in the commodity storage; and a control unit configured to: the upper freezing prevention control is performed for preventing freezing of the upper product stored in the product storage by stopping the cooling of the interior of the product storage by the cooling unit based on the outside air temperature detected by the outside air temperature sensor and the temperature of the upper portion in the product storage detected by the upper portion in the product storage temperature sensor.
As described above, the automatic vending machine according to one aspect of the present invention is configured such that the control unit: the upper freezing prevention control is performed for preventing freezing of the upper commodity stored in the commodity storage by stopping the cooling of the interior of the commodity storage by the cooling unit based on the temperature of the upper portion in the commodity storage detected by the upper portion temperature sensor in the commodity storage. As a result, at least the commodities in the commodity storage can be inhibited from being further cooled based on the temperature of the upper portion in the commodity storage, and therefore freezing of the commodities in the upper portion in the commodity storage can be inhibited. As a result, the following can be suppressed: the freezing of the commodities at the upper portion of the commodity storage room deteriorates the quality of the commodities, and causes the loss of the commodities due to the breakage of the containers of the commodities. Further, by performing the upper freeze prevention control based on not only the temperature of the upper portion in the interior but also the outside air temperature, it is possible to perform the upper freeze prevention control with higher accuracy in consideration of the outside air temperature than the case of only the temperature of the upper portion in the interior.
In the vending machine according to the above aspect, it is preferable that the vending machine further includes an in-box upper heater provided at an upper portion in the commodity storage box for heating commodities at the upper portion in the commodity storage box, and the vending machine further includes: the upper freeze prevention control is performed by stopping the cooling of the interior of the commodity storage compartment by the cooling unit and by operating the upper heater in the compartment. With this configuration, the upper portion of the commodity storage can be easily heated by using the in-upper heater provided at the upper portion in the commodity storage, as compared with a case where no heater is provided at the upper portion in the commodity storage. As a result, the upper commodity in the commodity storage compartment can be heated efficiently, and therefore freezing of the upper commodity in the commodity storage compartment can be suppressed quickly and more effectively.
In the vending machine according to the above aspect, preferably, the vending machine further includes a lower interior temperature sensor that detects a temperature of a lower portion in the commodity storage, and the control unit is configured to: the lower freezing prevention control for preventing the freezing of the lower commodity in the commodity storage compartment is performed independently of the upper freezing prevention control on the basis of the outside air temperature detected by the outside air temperature sensor and the temperature of the lower portion in the commodity storage compartment detected by the lower portion temperature sensor in the compartment. With this configuration, it is possible to perform the freeze prevention control by a required amount when there is a possibility that an upper commodity in the commodity storage room is frozen and when there is a possibility that a lower commodity in the commodity storage room is frozen. As a result, the freeze prevention control can be performed more efficiently and accurately in the upper portion and the lower portion of the commodity storage compartment. Further, by combining the upper freeze prevention control and the lower freeze prevention control, it is possible to reliably suppress freezing of the product in the product storage and to efficiently perform the freeze prevention control over the entire product storage.
In the vending machine according to the above aspect, it is preferable that the vending machine further includes a vent hole provided in an upper portion of the commodity storage compartment for circulating air in the upper portion of the commodity storage compartment. With this configuration, when the upper freeze prevention control is performed, air can be easily circulated in the upper portion of the commodity storage compartment using the vent hole, and therefore the freeze prevention control can be performed more efficiently in the upper portion of the commodity storage compartment.
In the above-described configuration including the in-compartment upper heater, it is preferable that the in-compartment upper heater further includes an in-compartment upper fan provided at an upper portion in the commodity storage compartment for circulating air in the commodity storage compartment, and that the in-compartment upper heater includes: in addition to stopping the cooling of the interior of the commodity storage compartment by the cooling unit, the upper freeze prevention control is performed by operating the upper interior heater and operating the upper interior fan. With this configuration, the heat generated by the upper heater in the interior can be efficiently circulated to the upper portion of the commodity storage compartment by the upper fan in the interior. As a result, the temperature distribution of the commodities in the upper portion of the commodity storage compartment can be suppressed from being uneven, and therefore, the commodities can be suppressed from being excessively heated or insufficiently heated.
In the vending machine according to the above aspect, preferably, the control unit is configured to: the upper freeze prevention control is started when the outside air temperature detected by the outside air temperature sensor is equal to or less than a first threshold value and the temperature of the upper portion of the commodity storage compartment detected by the compartment upper temperature sensor is equal to or less than a second threshold value. With this configuration, the upper freeze prevention control can be started at an appropriate timing by setting the first threshold value and the second threshold value to a temperature at which the upper commodity in the commodity storage compartment is likely to freeze.
In this case, the control unit is configured to: when the upper freeze prevention control is being performed, the upper freeze prevention control is terminated when the outside air temperature detected by the outside air temperature sensor is equal to or higher than a third threshold value which is a value higher than the first threshold value, or when the temperature of the upper portion of the commodity storage compartment detected by the compartment upper temperature sensor is equal to or higher than a fourth threshold value which is a value higher than the second threshold value. With this configuration, the third threshold and the fourth threshold are set to a value higher than the first threshold and a value higher than the second threshold, respectively, so that the starting condition and the ending condition of the upper freeze prevention control can be set to have a constant width. Therefore, it is possible to avoid restarting the upper freeze prevention control immediately after the upper freeze prevention control is finished, or ending the upper freeze prevention control immediately after the upper freeze prevention control is started, and therefore it is possible to suppress repetition of the start and end of the upper freeze prevention control in a short period of time. As a result, it is possible to suppress the consumption of components such as a cooling unit that is turned ON/OFF (ON/OFF) every time the start and the end of the upper freeze prevention control are repeated. Further, by terminating the upper freeze prevention control when the outside air temperature is equal to or higher than the third threshold value or when the temperature of the upper portion in the commodity storage compartment is equal to or higher than the fourth threshold value, it is possible to suppress the cooling unit from continuing to stop cooling the commodities in the commodity storage compartment. As a result, the following can be suppressed: in the upper freeze prevention control focusing on the upper commodity in the commodity storage, the cooling of the lower commodity in the commodity storage is also continuously stopped, and thus the lower commodity in the commodity storage is not properly cooled.
In the vending machine according to the above aspect, preferably, the control unit is configured to: the upper freeze prevention control is not started during a first predetermined time after the upper freeze prevention control is ended, and the upper freeze prevention control is not ended during a second predetermined time after the upper freeze prevention control is started. With this configuration, it is possible to reliably avoid restarting the upper freeze prevention control immediately after the upper freeze prevention control is finished or ending the upper freeze prevention control immediately after the upper freeze prevention control is started, and therefore it is possible to reliably suppress repetition of the start and end of the upper freeze prevention control for a short period of time. As a result, it is possible to reliably suppress the consumption of components such as the cooling unit that is turned on and off each time the start and the end of the upper freeze prevention control are repeated. Further, by ending the upper freeze prevention control after the second predetermined time has elapsed, it is possible to reliably suppress the cooling of the commodity in the commodity storage compartment by the cooling unit from continuing to stop due to the upper freeze prevention control. As a result, the following can be reliably suppressed: in the upper freeze prevention control focusing on the upper commodity in the commodity storage, the cooling of the lower commodity in the commodity storage is also continuously stopped, and thus the lower commodity in the commodity storage is not properly cooled.
Drawings
Fig. 1 is a sectional view showing an internal configuration of a vending machine according to a first embodiment of the present invention.
Fig. 2 is a block diagram showing a control structure of the vending machine according to the first embodiment of the present invention.
Fig. 3 is a flowchart illustrating a flow of freeze prevention control for the vending machine according to the first embodiment of the present invention.
Fig. 4 is a sectional view showing an internal configuration of a vending machine according to a second embodiment of the present invention.
Fig. 5 is a block diagram showing a control structure of a vending machine according to a second embodiment of the present invention.
Detailed Description
Hereinafter, embodiments embodying the present invention will be described based on the drawings.
The structure of the vending machine 100 according to the first embodiment of the present invention will be described with reference to fig. 1 and 2.
(Structure of vending machine)
As shown in fig. 1, the vending machine 100 is a device that cools or heats and sells commodities 80 such as canned beverages and plastic beverages. The vending machine 100 includes a main body cabinet 1 and a front door 2 provided to be openable and closable with respect to the main body cabinet 1. In the following description, the Y1 side on which the front door 2 is provided is sometimes referred to as the "front side", and the Y2 side opposite to the Y1 side is sometimes referred to as the "back side".
The main body cabinet 1 includes a product storage 3 for storing products 80 and an equipment room 4 for storing the refrigerant circuit device 20. The commodity storage 3 and the equipment room 4 are partitioned by the partition wall member 5 in the vertical direction (Z-axis direction), and are thereby partitioned into the commodity storage 3 on the upper side (Z1 side) and the equipment room 4 on the lower side (Z2 side). Note that, in the main body cabinet 1, a plurality of product storage containers 3 (for cooling or heating) are provided in a direction (X-axis direction) perpendicular to the paper surface, and the plurality of product storage containers 3 have the same configuration, and therefore, detailed description thereof is omitted. The refrigerant circuit device 20 is an example of the "cooling unit" in the claims.
In the commodity storage 3, an insulator 6 is provided so as to surround an inner space with an upper side (Z1 side) and a rear side (Y2 side) in contact with the main body cabinet 1 and a lower side (Z2 side) in contact with the partition wall member 5. As shown in fig. 1, in the vending machine 100, a space surrounded by the heat insulator 6 constitutes a substantial commodity storage 3.
The commodity storage 3 is provided with a commodity storage rack 10, an output chute 11, an interior heat exchanger 20a, an interior temperature sensor 13, an auxiliary heater 14, an interior fan 15, an interior temperature sensor 16, an auxiliary heater 17, and an interior fan 18. The in-storage temperature sensor 13 and the in-storage temperature sensor 16 are examples of "a lower temperature sensor in the storage" and "an upper temperature sensor in the storage" in the claims, respectively. The auxiliary heater 17 is an example of the "upper heater in the box" in the claims. The in-house fan 18 is an example of the "in-house upper fan" in the claims.
In the commodity storage 3, the commodity storage shelf 10 is disposed so as to extend from an upper portion to a lower portion in the commodity storage 3. The output chute 11, the interior heat exchanger 20a, the interior temperature sensor 13, the auxiliary heater 14, and the interior fan 15 are provided at a lower portion in the commodity storage 3. The interior temperature sensor 16, the auxiliary heater 17, and the interior fan 18 are provided at an upper portion in the commodity storage 3. In the first embodiment, a position above the approximate center (line 90 located there) of the commodity-accommodating shelf 10 in the height direction (Z-axis direction) is referred to as "upper part in the commodity-accommodating chamber 3", and a position below the line 90 is referred to as "lower part in the commodity-accommodating chamber 3".
The commodity storage rack 10 is configured to store commodities 80 stacked from the lower portion to the upper portion. The commodity-accommodating shelf 10 is provided therein with partitions 30 to form a plurality of partitions inside. The separator 30 is formed with a hole through which air can pass on the entire surface, and is configured to be able to circulate air inside the commodity storage rack 10. Further, an opening, not shown, through which the commodity 80 can pass when the commodity 80 is discharged is formed in the vicinity of the lower end portion of the commodity housing rack 10.
The commodity-accommodating shelf 10 has an opening 31 formed in the rear surface side (Y2 side). The opening 31 includes an opening 31a formed at a position lower than a substantial center (line 90 located there) in the height direction (Z-axis direction) of the commodity storage rack 10 and an opening 31b formed at a position upper than the line 90. Further, a rear air duct 3a extending in the vertical direction (Z-axis direction) between the rear surface side (Y2 side) of the commodity-accommodating shelf 10 and the heat insulator 6 is formed on the rear surface side. The opening 31b is an example of a "vent hole" in the claims.
The output chute 11 is disposed below the commodity storage rack 10, and is configured to guide the commodities 80 discharged from the commodity storage rack 10 to a commodity outlet, not shown, provided at a lower portion of the front door 2 by a commodity outlet mechanism, not shown. A plurality of through holes, not shown, are provided in the output chute 11 so that air can pass through the through holes in the thickness direction.
The interior heat exchanger 20a is a part of the refrigerant circuit device 20, and is provided to perform heat exchange between air cooled (heated) by the refrigerant circuit device 20 and air in the commodity storage 3. The interior heat exchanger 20a is provided in the vicinity of the lowermost portion in the commodity storage 3.
The interior temperature sensor 13 is provided in the vicinity of the lower end of the commodity-accommodating shelf 10. The interior temperature sensor 13 is configured to be able to detect a temperature of a lower portion in the commodity storage 3 (an interior lower portion temperature).
The auxiliary heater 14 is provided on the front side (Y1 side) of the interior heat exchanger 20 a. The auxiliary heater 14 is provided to further heat the air heated by the refrigerant circuit device 20 when the interior of the commodity storage 3 is heated by freeze prevention control or the like.
The interior fan 15 is provided on the front surface side (Y1 side) of the auxiliary heater 14. That is, the interior heat exchanger 20a, the auxiliary heater 14, and the interior fan 15 are arranged in this order from the back side (Y2 side) to the front side (Y1 side). The interior fan 15 is disposed so as to face the Y-axis direction, and is configured to be capable of blowing air from the back side (Y2 side) to the front side (Y1 side). This allows the in-house fan 15 to circulate air in the commodity storage 3.
The interior temperature sensor 16 is provided in the vicinity of the upper end of the commodity-accommodating shelf 10. The in-house temperature sensor 16 is configured to be able to detect the temperature of the upper portion in the commodity storage 3 (in-house upper portion temperature).
The auxiliary heater 17 is provided near the uppermost portion in the commodity storage 3. The auxiliary heater 17 is configured to be capable of heating the upper commodity 80 in the commodity storage 3.
The interior fan 18 is provided on the front surface side of the sub-heater 17 (Y1). That is, the auxiliary heater 17 and the in-box fan 18 are arranged in this order from the back side (Y2 side) to the front side (Y1 side). The interior fan 18 is disposed so as to face the Y-axis direction, and is configured to be capable of blowing air from the back side (Y2 side) to the front side (Y1 side). This allows the in-house fan 18 to circulate the air in the commodity storage 3.
In the equipment room 4, a portion of the refrigerant circuit device 20 other than the inside heat exchanger 20a is housed, and the refrigerant circuit device 20 is configured to supply cooling (heating) air to the commodity storage 3 to cool (heat) the inside of the commodity storage 3 to a predetermined temperature. The refrigerant circuit device 20 includes a compressor for compressing and discharging the refrigerant, an outdoor heat exchanger for exchanging heat with outside air, and the like in the equipment room 4.
An outside air temperature sensor 21 that detects the outside air temperature is provided in the equipment room 4. The outside air temperature sensor 21 is provided in the vicinity of an intake port of outside air provided in the equipment room 4.
As shown in fig. 2, the vending machine 100 includes a control unit 40 for controlling the operation of the entire vending machine 100, and a storage unit 41 for storing a program or the like used in the control unit 40.
The control Unit 40 is a computer including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control unit 40 is configured to perform freeze prevention control for preventing the freezing of the commodities 80 stored in the commodity storage 3 based on the outside air temperature and the storage interior temperature. Further, the freeze prevention control is performed on the product storage 3 that is cooled by the refrigerant circuit device 20 among the plurality of product storage 3.
The storage unit 41 is configured by, for example, a nonvolatile memory or the like. The storage unit 41 is configured to be capable of storing information (date and time, etc.) related to freeze prevention control performed in the past, a preset threshold value of the outside air temperature and the inside temperature, and the like.
(circulation of air in the storage of commodities)
Next, the circulation of air in the product storage 3 for adjusting the temperature of the product 80 stored in the product storage 3 will be described with reference to fig. 1. In addition, the general air flow is shown by the thick line arrows in the figure.
First, circulation of air in the lower portion of the commodity storage 3 will be described. When the in-compartment fan 15 is operated at the lower portion in the commodity storage 3, a flow of air from the back surface side (Y2 side) to the front surface side (Y1 side) is generated. The air cooled (heated) by the interior heat exchanger 20a (hereinafter referred to as "lower circulation air") passes through the interior fan 15, passes through the through-holes formed in the output chute 11, and is redirected upward. Then, the lower circulation air enters the inside of the commodity-accommodating shelf 10 from an opening formed at the lower end portion of the commodity-accommodating shelf 10.
Most of the circulating air entering the lower portion of the commodity-accommodating shelf 10 is directed upward so as to be guided to the opening 31a and flows from the front side (Y1 side) to the back side (Y2 side). The lower circulation air having passed through the opening 31a is then returned to the interior heat exchanger 20a via the back air duct 3 a. Further, a part of the circulating air entering the lower portion of the commodity-accommodating shelf 10 flows upward from the opening 31a and then spreads in the upper portion of the commodity-accommodating shelf 10. As described above, the lower circulating air circulates in the lower portion of the commodity storage 3, and thereby the commodities 80 (mainly, the lower portion of the commodity storage rack 10) stored in the commodity storage rack 10 can be cooled or heated.
Next, circulation of air in the upper portion of the commodity storage 3 will be described. When the interior fan 18 is operated at the upper portion in the commodity storage 3, a flow of air from the back surface side (Y2 side) to the front surface side (Y1 side) is generated. The air heated by the auxiliary heater 17 (hereinafter referred to as "upper circulation air") passes through the inside fan 18 and enters the commodity-accommodating shelf 10 through an opening formed in the commodity-accommodating shelf 10.
The upper circulation air having entered the commodity-accommodating shelf 10 flows downward from the front side (Y1 side) to the back side (Y2 side) so as to be guided to the opening 31 b. Then, the upper circulation air after passing through the opening 31b is returned to the auxiliary heater 17 via the back air duct 3 a. As described above, the upper circulation air circulates in the upper portion of the commodity storage box 3, and thereby the commodities 80 (mainly the upper portion of the commodity storage rack 10) stored in the commodity storage rack 10 can be heated.
(control for preventing freezing)
Next, the details of the freeze prevention control performed by the control unit 40 will be described.
The control unit 40 is configured to be capable of performing upper freeze prevention control for preventing freezing of an upper commodity 80 stored in the commodity storage 3 and lower freeze prevention control for preventing freezing of a lower commodity 80 stored in the commodity storage 3. In the first embodiment, the control unit 40 is configured to be able to control the upper freeze prevention control and the lower freeze prevention control independently of each other (separately). That is, the control unit 40 includes the following cases: both the upper freezing prevention control and the lower freezing prevention control are not performed; performing only upper freeze prevention control; performing only lower freeze prevention control; and simultaneously performing the upper freeze prevention control and the lower freeze prevention control.
In the first embodiment, the control unit 40 is configured to perform the upper freeze prevention control (lower freeze prevention control) based on the outside air temperature and the temperature of the upper portion (lower portion) of the commodity storage 3 (the temperature of the upper portion in the storage (the temperature of the lower portion in the storage)). Specifically, the configuration is: when the outside air temperature is equal to or lower than a first predetermined threshold value (e.g., -1 ℃) and the temperature of the upper portion in the interior (lower temperature in the interior) is equal to or lower than a second predetermined threshold value (e.g., 0 ℃), the control unit 40 starts the upper freeze prevention control (lower freeze prevention control). Further, the structure is: when the outside air temperature becomes equal to or higher than a predetermined third threshold value (for example, 1 ℃) or when the upper temperature in the storage (lower temperature in the storage) becomes equal to or higher than a predetermined fourth threshold value (for example, 3 ℃), the control unit 40 ends the upper freeze prevention control (lower freeze prevention control). Further, it is preferable that the third threshold value and the fourth threshold value are a value higher than the first threshold value and a value higher than the second threshold value, respectively.
As the upper freeze prevention control, the control unit 40 performs the following three operations in the first embodiment. That is, in the upper freeze prevention control, the control unit 40 is configured to simultaneously perform: the cooling operation of the refrigerant circuit device 20 is stopped, the auxiliary heater 17 is intermittently operated, and the in-house fan 18 is operated. When the cooling operation of the refrigerant circuit device 20 has been stopped by the lower freeze prevention control, the control unit 40 is configured to simultaneously perform the intermittent operation of the auxiliary heater 17 and the operation of the in-compartment fan 18 in the upper freeze prevention control. The reason why the auxiliary heater 17 is intermittently operated is to prevent the inside of the commodity storage 3 from being excessively heated by the auxiliary heater 17.
As the lower freeze prevention control, the control unit 40 performs the following three operations in the first embodiment. That is, in the lower freeze prevention control, the control unit 40 is configured to simultaneously perform: the cooling operation of the refrigerant circuit device 20 is stopped, the auxiliary heater 14 is intermittently operated, and the in-house fan 15 is operated. When the cooling operation of the refrigerant circuit device 20 has been stopped by the upper freeze prevention control, the control unit 40 is configured to simultaneously perform the intermittent operation of the auxiliary heater 14 and the operation of the in-compartment fan 15 in the lower freeze prevention control.
In the first embodiment, the control unit 40 is configured to: the freeze prevention control is not started within a first predetermined time (for example, 2 minutes) set in advance after the freeze prevention control (the upper freeze prevention control and the lower freeze prevention control) is ended. Further, the control unit 40 is configured to: the freeze prevention control is not ended within a second predetermined time (for example, 2 minutes) set in advance after the start of the freeze prevention control (the upper freeze prevention control and the lower freeze prevention control).
(procedure for Upper Freeze prevention control)
Next, a flow of the upper freeze prevention control based on the outside air temperature and the interior upper temperature will be described with reference to fig. 3. The flow for performing the lower freeze prevention control based on the outside air temperature and the lower temperature in the interior is the same as the flow for performing the upper freeze prevention control, and therefore, a detailed description thereof is omitted. The flow of the lower freeze prevention control is performed independently of the flow of the upper freeze prevention control.
First, when the flow for performing the upper freeze prevention control is started, the control unit 40 determines whether or not a first predetermined time set in advance has elapsed since the last end of the upper freeze prevention control, based on information stored in the storage unit 41 and the like, in step S101. When determining that the first predetermined time has elapsed since the last upper freeze prevention control was completed, the control unit 40 proceeds to step S102. When determining that the first predetermined time has not elapsed since the last upper freeze prevention control was completed, the control unit 40 repeats step S101.
In step S102, the control unit 40 determines whether or not the outside air temperature is equal to or lower than a first threshold value set in advance and the temperature of the upper portion inside the cabinet is equal to or lower than a second threshold value set in advance. When the control unit 40 determines that the outside air temperature is equal to or lower than the first threshold value and the temperature of the upper portion inside the cabinet is equal to or lower than the second threshold value, the process proceeds to step S103. When determining that the outside air temperature is not equal to or lower than the first threshold value or the temperature of the upper portion inside the cabinet is not equal to or lower than the second threshold value, the control unit 40 repeats step S102.
In step S103, the control unit 40 starts the upper freeze prevention control. As the upper freeze prevention control, the control unit 40 stops the cooling operation of the refrigerant circuit device 20, and also intermittently operates the auxiliary heater 17 and the in-compartment fan 18.
In step S104, the control unit 40 determines whether or not a second predetermined time period set in advance has elapsed since the start of the upper freeze prevention control. When determining that the second predetermined time has elapsed since the start of the latest upper freeze prevention control, the control unit 40 proceeds to step S105. When determining that the second predetermined time has not elapsed since the start of the latest upper freeze prevention control, the control unit 40 repeats step S104.
In step S105, the control unit 40 determines whether or not the outside air temperature is equal to or higher than a predetermined third threshold value or the temperature of the upper portion inside the cabinet is equal to or higher than a predetermined fourth threshold value. When determining that the outside air temperature is equal to or higher than the third threshold value or that the temperature of the upper portion inside the cabinet is equal to or higher than the fourth threshold value, the control unit 40 proceeds to step S106. When determining that the outside air temperature is not equal to or higher than the third threshold value and the temperature of the upper portion inside the cabinet is not equal to or higher than the fourth threshold value, the control unit 40 repeats step S105.
In step S106, the control unit 40 ends the upper freeze prevention control.
In step S107, the control unit 40 determines whether or not to end the monitoring of the internal upper temperature. When the control in the cold district is not required, the monitoring of the temperature of the upper portion in the interior can be terminated by the operation of the user, for example. When determining that the monitoring of the temperature of the upper portion in the interior of the refrigerator is finished, the control unit 40 ends the flow for performing the freeze prevention control. When determining that the monitoring of the temperature of the upper portion in the interior is not finished, the control unit 40 returns to step S101.
(Effect of the first embodiment)
In the first embodiment, the following effects can be obtained.
In the first embodiment, as described above, the vending machine 100 includes the control unit 40 configured to perform the upper freeze prevention control for preventing the upper product 80 stored in the product storage 3 from freezing. The upper freeze prevention control is performed by stopping the cooling of the inside of the commodity storage 3 by the refrigerant circuit device 20 based on the temperature of the upper portion inside the commodity storage 3 detected by the in-storage temperature sensor 16. This can suppress at least the commodities 80 in the commodity storage 3 from being further cooled based on the temperature of the upper portion in the commodity storage 3, and therefore can suppress the freezing of the commodities 80 in the upper portion in the commodity storage 3. As a result, the following can be suppressed: the freezing of the commodity 80 at the upper portion in the commodity storage 3 deteriorates the quality of the commodity 80, and causes the loss of the commodity 80 due to the breakage of the container of the commodity 80. Further, by performing the upper freeze prevention control based on not only the temperature of the upper portion in the interior but also the outside air temperature, it is possible to perform the upper freeze prevention control with higher accuracy in consideration of the outside air temperature than the case of only the temperature of the upper portion in the interior.
In the first embodiment, as described above, the vending machine 100 further includes the auxiliary heater 17, and the auxiliary heater 17 is provided at an upper portion in the commodity storage 3 to heat the commodity at the upper portion in the commodity storage 3. The upper freeze prevention control is performed by stopping the cooling of the inside of the commodity storage 3 by the refrigerant circuit device 20 and by operating the auxiliary heater 17. Thus, the upper portion of the commodity storage 3 can be easily heated by using the auxiliary heater 17 provided in the upper portion of the commodity storage 3, as compared with a case where no heater is provided in the upper portion of the commodity storage 3. As a result, the upper commodity 80 in the commodity storage 3 can be heated efficiently, and therefore freezing of the upper commodity 80 in the commodity storage 3 can be suppressed quickly and more effectively.
In the first embodiment, as described above, the vending machine 100 further includes the interior temperature sensor 13 that detects the temperature of the lower portion in the product storage 3. The control unit 40 is configured to perform lower freeze prevention control for preventing the freezing of the lower commodity 80 stored in the commodity storage 3, independently of the upper freeze prevention control. The lower freeze prevention control is performed based on the outside air temperature detected by the outside air temperature sensor 21 and the temperature of the lower portion in the commodity storage 3 detected by the storage interior temperature sensor 13. This makes it possible to perform the freeze prevention control by a required amount when there is a fear that the upper product 80 in the product storage 3 is frozen and when there is a fear that the lower product 80 in the product storage 3 is frozen. As a result, the freeze prevention control can be performed more efficiently and accurately in the upper portion and the lower portion of the product storage 3. Further, by combining the upper freeze prevention control and the lower freeze prevention control, it is possible to reliably suppress freezing of the product 80 in the product storage 3 and to efficiently perform the freeze prevention control in the entire product storage 3.
In the first embodiment, as described above, the vending machine 100 further includes the opening 31b provided in the upper portion of the product storage 3 for circulating air in the upper portion of the product storage 3. Thus, when the upper freeze prevention control is performed, the air can be easily circulated in the upper portion of the commodity storage 3 using the opening 31b, and therefore the freeze prevention control can be more efficiently performed in the upper portion of the commodity storage 3.
In the first embodiment, as described above, the vending machine 100 further includes the inside fan 18, and the inside fan 18 is provided at an upper portion in the commodity storage 3 to circulate air in the commodity storage 3. The upper freeze prevention control is performed by stopping the cooling of the inside of the commodity storage 3 by the refrigerant circuit device 20, operating the auxiliary heater 17, and operating the in-storage fan 18. This enables the heat generated by the auxiliary heater 17 to be efficiently circulated to the upper portion in the commodity storage 3 by the in-compartment fan 18. As a result, the temperature distribution of the commodities 80 on the upper portion in the commodity storage 3 can be suppressed from being uneven, and therefore, the phenomenon in which the commodities 80 are excessively heated or the phenomenon in which the commodities 80 are not sufficiently heated can be suppressed from occurring.
In the first embodiment, as described above, the control unit 40 is configured to: when the outside air temperature detected by the outside air temperature sensor is equal to or less than a first threshold value and the temperature of the upper portion in the commodity storage 3 detected by the inside temperature sensor 16 is equal to or less than a second threshold value, the upper freeze prevention control is started. Thus, the upper freeze prevention control can be started at an appropriate timing by setting the first threshold and the second threshold to temperatures at which the upper commodities in the commodity storage 3 are likely to freeze.
In the first embodiment, as described above, the control unit 40 is configured to: when the outside air temperature detected by the outside air temperature sensor 21 is equal to or higher than the third threshold value or when the temperature of the upper portion of the commodity storage 3 detected by the interior temperature sensor 16 is equal to or higher than the fourth threshold value while the upper freeze prevention control is being performed, the upper freeze prevention control is terminated. The third threshold and the fourth threshold are a value higher than the first threshold and a value higher than the second threshold, respectively. In this way, the third threshold and the fourth threshold are set to a value higher than the first threshold and a value higher than the second threshold, respectively, so that the starting condition and the ending condition of the upper freeze prevention control can be set to have a constant width. Therefore, it is possible to avoid restarting the upper freeze prevention control immediately after the upper freeze prevention control is finished, or ending the upper freeze prevention control immediately after the upper freeze prevention control is started, and therefore it is possible to suppress repetition of the start and end of the upper freeze prevention control in a short period of time. As a result, the consumption of components such as the refrigerant circuit device 20 that are turned on/off every time the start and the end of the upper freeze prevention control are repeated can be suppressed. Further, by terminating the upper freeze prevention control when the outside air temperature is equal to or higher than the third threshold value or when the temperature of the upper portion in the product storage 3 is equal to or higher than the fourth threshold value, it is possible to suppress the refrigerant circuit device 20 from continuously stopping the cooling of the product 80 in the product storage 3. As a result, the following can be suppressed: in the upper freeze prevention control focusing on the upper product 80 in the product storage 3, the cooling of the lower product 80 in the product storage 3 is also continuously stopped, and thus the lower product 80 in the product storage 3 is not appropriately cooled.
In the first embodiment, as described above, the control unit 40 is configured to: the upper freeze prevention control is not started during a first predetermined time after the upper freeze prevention control is ended, and the upper freeze prevention control is not ended during a second predetermined time after the upper freeze prevention control is started. This makes it possible to reliably avoid restarting the upper freeze prevention control immediately after the upper freeze prevention control is finished, or ending the upper freeze prevention control immediately after the upper freeze prevention control is started, and therefore, it is possible to reliably suppress repetition of the start and end of the upper freeze prevention control in a short period of time. As a result, the consumption of the components such as the refrigerant circuit device 20 that are turned on/off every time the start and the end of the upper freeze prevention control are repeated can be reliably suppressed. Further, by ending the upper freeze prevention control after the second predetermined time has elapsed, it is possible to reliably suppress the refrigerant circuit device 20 from continuing to stop cooling the commodities in the commodity storage 3 due to the upper freeze prevention control. As a result, the following can be reliably suppressed: in the upper freeze prevention control focusing on the upper product 80 in the product storage 3, the cooling of the lower product 80 in the product storage 3 is also continuously stopped, and thus the lower product 80 in the product storage 3 is not appropriately cooled.
[ second embodiment ]
Next, a second embodiment will be described with reference to fig. 4 and 5. In the second embodiment, an example in which a heater having a configuration different from that of the auxiliary heater 17 of the first embodiment is provided will be described. In the drawings, the same components as those of the first embodiment are denoted by the same reference numerals.
As shown in fig. 4, the vending machine 200 according to the second embodiment of the present invention includes a product storage 203 for storing products. Unlike the automatic vending machine 100 according to the first embodiment in which the interior temperature sensor 16, the auxiliary heater 17, and the interior fan 18 are provided in the upper portion of the commodity storage 3, the interior temperature sensor 16 and the auxiliary heater 217 configured to be capable of heating the commodities 80 in the upper portion of the commodity storage 203 are provided in the upper portion of the commodity storage 203. The auxiliary heater 217 is an example of the "upper heater in the library" in the claims.
In the product storage 203, a product storage rack 210 is provided so as to extend from the upper portion to the lower portion of the product storage 203. As shown in fig. 4, the auxiliary heater 217 is a sheet-like heat source and is attached to a portion of the partition plate 230 in the commodity storage rack 210. Further, in the drawing, the auxiliary heater 217 is depicted close to the commodity 80 for a space problem, but actually the auxiliary heater 217 is disposed so as not to contact the commodity 80.
The auxiliary heater 217 is provided above the substantial center (line 90 located there) of the commodity-accommodating shelf 10 in the height direction (Z-axis direction). The auxiliary heater 217 is provided in the vicinity of the substantial center in the direction (Y-axis direction) from the front side (Y1 side) to the back side (Y2 side) of the product storage shelf 10.
The auxiliary heater 217 is constituted by: the amount of heat generated is relatively smaller than the auxiliary heater 17 of the vending machine 100 according to the first embodiment. In the vending machine 200 according to the second embodiment, unlike the vending machine 100 according to the first embodiment, the following configuration is adopted: the air heated by the auxiliary heater 217 is not actively circulated, but the air heated by the auxiliary heater 217 is diffused in the upper portion of the commodity storage 203 by natural convection.
Further, unlike the vending machine 100 according to the first embodiment in which the opening 31a and the opening 31b are formed on the back surface side (Y2 side), the commodity-accommodating shelf 210 is formed with only the opening 31a on the back surface side (Y2 side). This is because, in the vending machine 200 according to the second embodiment, air is not actively circulated by a fan at the upper portion in the product storage 203.
As shown in fig. 5, the vending machine 200 includes a control unit 240 for controlling the operation of the entire vending machine 200. The control unit 240 is configured to perform freeze prevention control for preventing the freezing of the commodity 80 stored in the commodity storage 203 based on the outside air temperature and the storage temperature.
The other structure of the second embodiment is the same as that of the first embodiment.
(control for preventing freezing)
The details of the freeze prevention control performed by the control unit 240 will be described.
The control unit 240 is configured to be capable of independently performing upper freeze prevention control for preventing freezing of an upper commodity 80 stored in the commodity storage 203 and lower freeze prevention control for preventing freezing of a lower commodity 80 stored in the commodity storage 203.
In the second embodiment, the upper freeze prevention control is configured to perform the following two operations. That is, in the upper freeze prevention control, the cooling operation of the refrigerant circuit device 20 is stopped and the auxiliary heater 217 is intermittently operated at the same time.
The lower freeze prevention control in the second embodiment is the same as the lower freeze prevention control in the first embodiment. The other control of the second embodiment is the same as the control of the first embodiment.
(Effect of the second embodiment)
In the second embodiment, as described above, the vending machine 200 includes the control unit 240 configured to perform the upper freeze prevention control for preventing the upper product 80 stored in the product storage 203 from freezing. The upper freeze prevention control is performed by stopping the cooling of the inside of the product storage 203 by the refrigerant circuit device 20 based on the temperature of the upper portion inside the product storage 203 detected by the in-storage temperature sensor 16. Thereby, as in the first embodiment, the following can be suppressed: the freezing of the product 80 in the upper portion of the product storage 203 deteriorates the quality of the product 80, and causes a loss of the product 80 due to breakage of the container or the like.
In the second embodiment, as described above, in the vending machine 200, the auxiliary heater 217 having a relatively small heat quantity is provided in the upper portion of the product storage 203. Thus, even if a fan for circulating the air heated by the heater is not provided as in the case of providing a heater having a large amount of heat, the air can be easily heated in the upper portion of the commodity storage 203 without causing a deviation in temperature distribution. Further, since the auxiliary heater 217 is sheet-shaped, it can be provided so as not to directly contact the product 80 but to be converged within the thickness of the partition plate 230. As a result, the upper freeze prevention control can be performed without worrying about the installation space.
Other effects of the second embodiment are the same as those of the first embodiment.
[ modified examples ]
It should be understood that the embodiments disclosed herein are illustrative in all respects, and not restrictive. The scope of the present invention is indicated by the claims, rather than the description of the above embodiments, and includes all modifications (variations) within the meaning and scope equivalent to the claims.
For example, in the first and second embodiments, the position above the approximate center (line 90 located therein) in the height direction (Z-axis direction) of the commodity storage shelves 10 and 210 is referred to as the "upper part in the commodity storage shelves 3 and 203", and the position below the line 90 is referred to as the "lower part in the commodity storage shelves 3 and 203". In the present invention, the boundary between the upper portion and the lower portion in the commodity storage box may be a position other than the substantial center in the height direction of the commodity storage rack. For example, the positions above and below the approximate center in the height direction of the commodity storage box itself may be referred to as "upper portion in the commodity storage box" and "lower portion in the commodity storage box", respectively.
In the first and second embodiments, the control units 40 and 240 are configured not to start the freeze prevention control for a first predetermined time period set in advance after the freeze prevention control (the upper freeze prevention control and the lower freeze prevention control) is ended. In the present invention, the control unit may not determine the time since the freeze prevention control is finished. In this case, step S101 is omitted in the flow of fig. 3.
In the first and second embodiments, the control units 40 and 240 are configured not to end the freeze prevention control for a first predetermined time period set in advance after the start of the freeze prevention control (the upper freeze prevention control and the lower freeze prevention control), but the present invention is not limited to this. In the present invention, the control unit may not determine the time from the start of the freeze prevention control. In this case, step S105 is omitted in the flow of fig. 3.
In the first and second embodiments, the first predetermined time and the second predetermined time are set to the same time, but the present invention is not limited to this. In the present invention, the first predetermined time and the second predetermined time may be set to different times.
In the first and second embodiments, the first threshold, the second threshold, the third threshold, and the fourth threshold in the upper freeze prevention control are set to the same values as the first threshold, the second threshold, the third threshold, and the fourth threshold in the lower freeze prevention control. In the present invention, the first threshold value, the second threshold value, the third threshold value, and the fourth threshold value may be set to values different from each other in the upper freeze prevention control and the lower freeze prevention control.
In the first and second embodiments, the second threshold value is set to a value higher than the first threshold value, and the fourth threshold value is set to a value higher than the third threshold value. In the present invention, the first threshold value and the second threshold value may be set to equal values, or the third threshold value and the fourth threshold value may be set to equal values.
In the first and second embodiments, the control units 40 and 240 are configured to terminate the upper freeze prevention control (lower freeze prevention control) when the outside air temperature is equal to or higher than the third threshold value or when the inside-compartment upper temperature is equal to or higher than the fourth threshold value, but the present invention is not limited to this. In the present invention, the control unit may be configured to terminate the upper freeze prevention control (lower freeze prevention control) when the outside air temperature is equal to or higher than the third threshold and the inside-compartment upper temperature is equal to or higher than the fourth threshold.
In the first and second embodiments, the example in which the control units 40 and 240 are caused to perform step S102 after step S101 is shown, and it is determined whether or not the first predetermined time has elapsed since the last upper freeze prevention control was completed in step S101, and it is determined whether or not the outside air temperature is equal to or less than the first threshold value and the interior upper temperature is equal to or less than the second threshold value in step S102, but the present invention is not limited thereto. In the present invention, step S101 may be performed after step S102.
In the first and second embodiments, the example in which the control units 40 and 240 are caused to perform step S105 after step S104 is shown, and it is determined whether or not a second predetermined time has elapsed since the start of the latest upper freeze prevention control in step S104, and it is determined whether or not the outside air temperature is equal to or lower than the third threshold and the internal upper temperature is equal to or lower than the fourth threshold in step S105, but the present invention is not limited to this. In the present invention, step S104 may be performed after step S105.
In the first and second embodiments, the control units 40 and 240 are configured to perform the upper freeze prevention control based on the outside air temperature and the interior upper temperature. Further, although the control units 40 and 240 are configured to perform the lower freeze prevention control based on the outside air temperature and the temperature of the lower portion in the interior, the present invention is not limited to this. In the present invention, the upper freeze prevention control (lower freeze prevention control) may not be performed when the outside air temperature sensor 21 and the inside temperature sensor 13 (inside temperature sensor 16) do not operate normally. In this case, for example, the following structure may be adopted: after step S102 and step S105, it is determined whether or not the outside air temperature sensor 21 and the in-compartment temperature sensor 13 (in-compartment temperature sensor 16) are operating normally.
In addition, in the first embodiment described above, the following example is shown: the upper freeze prevention control is configured to stop the cooling operation of the refrigerant circuit device 20, operate the auxiliary heater 17, and operate the interior fan 18 at the same time. In the second embodiment, the example in which the cooling operation of the refrigerant circuit device 20 is stopped and the auxiliary heater 217 is operated is described, but the present invention is not limited to this. In the present invention, as the upper freeze prevention control, only the cooling operation of the refrigerant circuit device may be stopped. In this case, it is not necessary to provide a heater or a fan at the upper portion in the commodity storage compartment.
In the case where the heater and the fan are not provided in the upper portion of the commodity storage compartment as described above, it is preferable that the air heated in the lower portion of the commodity storage compartment is sufficiently circulated to the upper portion as the upper freeze prevention control. For example, the air volume of an interior fan provided at a lower portion in the commodity storage compartment may be increased.
In the first embodiment, the auxiliary heater 17 and the in-box fan 18 are provided in the upper portion of the commodity storage box 3. In the second embodiment, the auxiliary heater 217 is provided in the upper portion of the product storage 203 without providing a fan, but the present invention is not limited to this. In the present invention, only the interior fan may be provided in the upper portion of the commodity storage interior without providing the auxiliary heater. This makes it possible to facilitate circulation of air from the lower portion to the upper portion in the commodity storage compartment together with the interior fan 15 provided at the lower portion in the commodity storage compartment.
In the first and second embodiments, the following examples are shown: as a part of the operation of the upper freeze prevention control, the auxiliary heaters 17 and 217 are intermittently operated. Further, an example in which the auxiliary heater 14 is intermittently operated as a part of the operation of the lower freeze prevention control is shown, but the present invention is not limited to this. In the present invention, the auxiliary heater may be continuously operated. Further, it is sufficient to determine whether the sub-heater is operated intermittently or continuously, based on the amount of heat generated by the sub-heater.
In the first embodiment, the opening 31a is formed below the approximate center (line 90 located here) in the height direction (Z-axis direction) of the commodity-housing rack 10, and the opening 31b is formed below the line 90. In the present invention, both the opening 31a and the opening 31b may be formed above the line 90, or both the opening 31a and the opening 31b may be formed below the line 90.
In the second embodiment, the opening 31a is formed below the approximate center (the line 90 located there) of the commodity-accommodating shelf 210 in the height direction (Z-axis direction) in the example, but the present invention is not limited to this. In the present invention, the opening 31a may be formed above the line 90. Further, as in the first embodiment, the opening 31a may be formed at both the upper side and the lower side of the line 90.
In the first and second embodiments, the processes of the control units 40 and 240 have been described using a flow-driven process in which the processes are sequentially performed according to the process flow for convenience of description, but the present invention is not limited thereto. In the present invention, the processing of the control unit may be performed by event-driven (event driven) processing in which the processing is executed in units of events. In this case, the event may be performed by a complete event-driven type, or may be performed by combining event-driven and flow-driven types.
Claims (7)
1. A vending machine is provided with:
a commodity storage box for storing commodities;
a cooling unit that cools the inside of the commodity storage compartment to a predetermined temperature;
an outside air temperature sensor that detects an outside air temperature;
an in-storage upper temperature sensor that detects a temperature of an upper portion in the commodity storage; and
a control unit configured to: an upper freezing prevention control for preventing freezing of the commodity stored in the upper portion of the commodity storage by stopping cooling of the interior of the commodity storage by the cooling unit based on an outside air temperature detected by the outside air temperature sensor and an upper temperature in the commodity storage detected by the upper temperature sensor in the commodity storage,
wherein the control unit is configured to: the upper freeze prevention control is started when the outside air temperature detected by the outside air temperature sensor is equal to or lower than a first threshold value and the temperature of the upper portion of the commodity storage compartment detected by the compartment upper temperature sensor is equal to or lower than a second threshold value different from the first threshold value.
2. The vending machine of claim 1,
further comprises an upper heater in the storage, which is provided at an upper portion in the commodity storage and heats the commodity at the upper portion in the commodity storage,
the control unit is configured to: the upper freeze prevention control is performed by stopping the cooling of the inside of the commodity storage compartment by the cooling unit and by operating the in-compartment upper heater.
3. Vending machine according to claim 1 or 2,
further comprises a lower temperature sensor for detecting the temperature of the lower part of the commodity storage,
the control unit is configured to: a lower freezing prevention control for preventing the freezing of the commodity stored in the lower portion of the commodity storage compartment is performed independently of the upper freezing prevention control on the basis of the outside air temperature detected by the outside air temperature sensor and the temperature of the lower portion of the commodity storage compartment detected by the compartment lower temperature sensor.
4. The vending machine of claim 1,
the air circulation structure further comprises an air vent provided in an upper portion of the commodity storage compartment for circulating air in the upper portion of the commodity storage compartment.
5. The vending machine of claim 2,
further comprises an inner upper fan disposed at an upper portion of the commodity storage compartment for circulating air in the commodity storage compartment,
the control unit is configured to: the upper freeze prevention control is performed by operating the upper heater in the interior and operating the upper fan in the interior in addition to stopping the cooling unit from cooling the interior of the commodity storage.
6. The vending machine of claim 1,
the control unit is configured to: when the upper freeze prevention control is being performed, the upper freeze prevention control is terminated when the outside air temperature detected by the outside air temperature sensor is equal to or higher than a third threshold value, which is a value higher than the first threshold value, or when the temperature of the upper portion of the commodity storage compartment detected by the compartment upper temperature sensor is equal to or higher than a fourth threshold value, which is a value higher than the second threshold value.
7. The vending machine of claim 1,
the control unit is configured to: the upper freeze prevention control is not started during a first predetermined time after the upper freeze prevention control is ended, and the upper freeze prevention control is not ended during a second predetermined time after the upper freeze prevention control is started.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017164044A JP2019040554A (en) | 2017-08-29 | 2017-08-29 | Automatic vending machine |
| JP2017-164044 | 2017-08-29 |
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| CN109427140A CN109427140A (en) | 2019-03-05 |
| CN109427140B true CN109427140B (en) | 2022-04-26 |
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| CN110533829A (en) * | 2019-09-11 | 2019-12-03 | 青岛水木绿色环保有限公司 | A kind of self-service with antifreeze function sells equipment |
| TWI712009B (en) * | 2019-09-17 | 2020-12-01 | 嶼丞科技股份有限公司 | Vending machine and temperature controlling method thereof |
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| CN109427140A (en) | 2019-03-05 |
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