JP2005141472A - Vending machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the safety of a vending machine having a cooling device that uses combustible HC refrigerant by reducing the risk of leakage of the refrigerant. <P>SOLUTION: The vending machine includes a cooling device 6 consisting of a compressor or the like and combustible refrigerant 7; an inner fan 4; and a cooler temperature detection means 8 for a cooler 3. When the cooler temperature detection means 8 detects temperatures not higher than a predetermined temperature for a certain period of time, the inner fan 4 is determined to have failed and failure is displayed in a display part 9 to urge maintenance and repair of the inner fan 4. This ensures safety in a continuous manner. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vending machine using a cooling device using a combustible refrigerant.

  In recent years, from the viewpoint of protecting the earth's ozone layer, the use of refrigerants containing chlorine atoms, such as refrigerant CFC (chlorofluorocarbon) -12 or HCFC (hydrochlorofluorocarbon) -22, which has been used in the refrigeration cycle of the cooling device has been regulated. However, conversion to an HFC (hydrofluorocarbon) refrigerant that does not contain chlorine atoms and does not destroy the ozone layer is in progress.

  Conventionally, in vending machines mainly using HCFC-22, R407C, which is a mixed refrigerant of HFC refrigerant, is adopted and sold as an alternative refrigerant.

  However, currently used HFC refrigerants such as R407C do not destroy the ozone layer, but because of their high global warming potential, they are insufficient for global warming, and therefore have low global warming potential. Therefore, natural refrigerants such as HC (hydrocarbon) are attracting attention in place of HFC.

  On the other hand, since HC refrigerants are flammable, safety is an issue when used as a refrigerant in a refrigeration cycle in a cooling device, and consideration for refrigerant leakage, that is, precautionary measures by diffusion measures are necessary. It is.

  For this reason, as an example of preventing the flammable refrigerant from leaking into the sealed chamber, a refrigeration system is connected in cascade, a refrigeration cycle using the flammable refrigerant is provided outside the cabinet, and brine is placed inside the cabinet. There is a method of sink cooling (for example, see Patent Document 1).

  In addition, there is a refrigerator disclosed (for example, see Patent Document 2) that can reduce the refrigerant leakage to the inside and avoid the risk of ignition and explosion even if a flammable refrigerant leaks.

In addition, there is a vending machine that detects a refrigerant leak in a warehouse and discharges the leaked refrigerant from an exhaust port provided with a damper (for example, see Patent Document 3).
JP 2001-118134 A Japanese Patent Laid-Open No. 9-42817 JP 2001-134827 A

  However, when the refrigerant leaks into the cabinet, it is necessary to quickly diffuse it around.

  In order to diffuse the refrigerant that has leaked into the cabinet, it is considered that the diffusion effect by the wind of the cabinet fan is mainly large. Therefore, the internal fan has a role of diffusing the leaked refrigerant in addition to the role of cooling the internal space.

  Therefore, in the unlikely event that the internal fan has failed, if the refrigerant leaks, the leaked refrigerant cannot be diffused. Therefore, it is necessary to monitor the internal fan so that it can always operate normally.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a highly safe vending machine with reduced risk even when a flammable refrigerant is used as a refrigerant in a refrigeration cycle.

  In order to solve the above-mentioned conventional problems, the vending machine according to the present invention stops the cooling device at the time of failure of the internal fan motor by the cooler temperature detecting means and lights an alarm lamp or sounds an alarm buzzer. Is

  The vending machine of the present invention stops the cooling device when the fan motor in the warehouse breaks down, and urges maintenance by turning on the alarm lamp or sounding the alarm buzzer to ensure safety by performing repairs. it can.

  A first invention includes a storage chamber, a storage shelf that stores products in the storage chamber, a cooler that cools the storage chamber, an internal fan that circulates air in the storage chamber, and a cooling device that includes a flammable refrigerant. And a cooler temperature detecting means provided in the cooler, and when the cooler temperature detecting means is below a predetermined temperature for a certain time, it is determined that the internal fan has failed and is combustible due to air diffusion by the internal fan. The concentration of sexual gas in the air is quickly reduced to reduce the risk of refrigerant leakage and ensure safety. By doing so, safety can be secured continuously.

  According to a second aspect of the present invention, an internal temperature detection means provided in the storage room is provided, and if the temperature difference between the cooler temperature detection means and the internal temperature detection means is greater than a predetermined temperature, it is determined that the internal fan has failed. In order to display a failure on the display unit, the failure determination is performed based on the temperature difference between the cooler temperature detection means and the internal temperature detection means. At times, maintenance can be promoted by displaying faults on the display, and safety can be secured continuously by repairing.

  According to a third aspect of the present invention, an alarm lamp is provided, and when the temperature difference between the cooler temperature detecting means and the internal temperature detecting means is larger than a predetermined temperature, it is determined that the internal fan has failed, and a failure indication is displayed on the display unit. The alarm lamp is lit or blinking at the same time, and it is possible to notify the failure at a glance, and when the fan in the warehouse breaks down, the maintenance can be promptly and reliably maintained and the safety can be ensured by repairing it. .

  4th invention is equipped with the alarm buzzer, and when the temperature difference of the said cooler temperature detection means and the said internal temperature detection means is larger than predetermined temperature, it judges that the internal fan has failed, and displays a failure on the display unit. The alarm buzzer is also sounded, and the failure can be informed by the sound. When the fan in the warehouse breaks down, the maintenance can be promptly and reliably promoted, and the safety can be continuously secured by performing the repair.

  According to a fifth aspect of the present invention, when the temperature difference between the cooler temperature detecting means and the internal temperature detecting means is larger than a predetermined temperature, it is determined that the internal fan has failed, the failure is displayed on the display unit, and the cooling device The operation of the cooling device when the internal fan is in a failure state does not exchange heat in the cooler, so the low-pressure pressure decreases and the low-pressure side temperature rises. This will increase the burden on the compressor, so if the internal fan breaks down, the cooling system will be stopped to ensure reliability, and the maintenance of the internal fan will be promoted and repairs will continue to ensure safety. Can be secured.

  According to a sixth aspect of the present invention, when the temperature difference between the cooler temperature detecting means and the internal temperature detecting means is larger than a predetermined temperature, it is determined that the internal fan has failed, the failure is indicated on the display unit, and the product of the door The sold-out display is displayed on the selection button, and the sales in the cooling setting store are stopped. By stopping the sales, anyone can be informed immediately that it is in an abnormal state, and the fan in the store has failed. Occasionally, the maintenance of the internal fan can be promoted more quickly and reliably, and repairs can be performed to ensure safety.

  Hereinafter, embodiments of a vending machine according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a side sectional view of a vending machine according to Embodiment 1 of the present invention. In FIG. 1, the storage chamber 1 has a semi-hermetic structure by a heat insulating material. The storage shelf 2 is used for cooling and storing products to be sold provided in the storage chamber 1. The cooler 3 cools the storage chamber. The internal fan 4 is provided in the storage chamber 1, and the duct 5 is for circulating cold air. The cooling device 6 sequentially connects a compressor (not shown), a condenser (not shown), a decompression device (not shown), and the cooler 3. The combustible refrigerant 7 is sealed in the cooling device 6 and is a R290 single refrigerant, an R600a single refrigerant, or a mixed refrigerant containing R290. The cooler temperature detecting means 8 is attached in close contact with the cooler and is, for example, a thermistor. The display unit 9 is provided on the door 10, and the display unit 9 is actually a display provided on the remote control operation unit, a display provided on the control box, or the like.

  The operation of the vending machine configured as described above will be described.

  When the product stored in the storage shelf 2 is cooled, the cooling device 6 is operated, and the cool air cooled by the cooler 3 by the internal fan 4 is circulated. The cool air cools the product stored in the storage shelf 2 by the internal fan 4 and returns to the cooler 3 through the duct 5 to repeat cooling.

  At this time, the combustible refrigerant 7 sealed in the cooling device 6 is compressed by a compressor (not shown) to become a high-temperature high-pressure gas, and is liquefied by a condenser (not shown). The liquefied combustible refrigerant 7 is decompressed by a decompression device (not shown), and evaporated and gasified by the cooler 3. When gasifying, the cooler is cooled by latent heat of vaporization, and the cooler circulates through the storage chamber 1 by the internal fan 4 to cool the product.

  Since the flammable refrigerant 7 is sealed in the cooling device 6 and sealed, there is no worry that it will not leak out during normal use, but it may be accidentally damaged or damaged by piping vibration, etc. If the refrigerant leaks, the concentration of the combustible gas in the air diffused by the internal fan 4 can be quickly reduced. Since the R290 single refrigerant, the R600a single refrigerant, or the mixed refrigerant including R290 has a large specific gravity with respect to air, it diffuses in a state in which it lies below. Therefore, the combustible refrigerant 7 diffused by the internal fan 4 is discharged to the outside of the vending machine through the gap of the product outlet 11 or the like, and can be diffused more quickly around the vending machine.

  FIG. 2 is a block diagram of the vending machine according to the first embodiment of the present invention. FIG. 3 is a flowchart showing the operation of the embodiment.

  In the figure, the comparison determination is performed by the comparison determination means 12 between the temperature of the cooler 3 detected by the cooler temperature detection means 8 and a predetermined determination temperature set in advance. The arithmetic control unit 13 displays a failure on the display unit 9 based on a signal from the comparison determination unit 12 and incorporates the comparison determination unit 12. The timer 14 measures time when the temperature of the cooler 3 is equal to or lower than the determination temperature.

  The operation of the main part of the vending machine configured as described above will be described with reference to the flowchart of FIG.

  First, in step 1, the cooler temperature detecting means 8 detects the temperature Tc of the cooler 3. Next, in step 2, the comparison determination unit 12 performs a comparison determination with a predetermined determination temperature T1 set in advance. If Tc is higher than T1, return to Step 1. If Tc is lower than T1, a fixed time is measured by the timer 14 in step 3, and the temperature Tc of the cooler 3 is detected again by the cooler temperature detecting means 8 in step 4. In step 5, the comparison determination means 12 makes a comparison determination with a predetermined determination temperature T1 set in advance. If Tc is higher than T1, return to Step 1. When Tc is lower than T1, it is determined that the internal fan 4 is in failure, and the failure of the internal fan 4 is displayed on the display unit 9 in step 6.

  That is, when the internal fan 4 fails, the low-temperature and low-pressure gas evaporated by the cooler 3 is not heat-exchanged by the internal fan 4, so the temperature of the cooler 3 decreases. Therefore, the failure of the internal fan 4 can be determined when the temperature of the cooler 3 becomes equal to or lower than the predetermined temperature for a certain time.

  As described above, the vending machine according to the present embodiment includes the cooling device 6 including the storage chamber 1, the cooler 3, the internal fan 4, and the combustible refrigerant 7, and the cooling attached in close contact with the cooler 3. When the cooler temperature detecting means 8 is below a predetermined temperature for a certain time, it is determined that the internal fan 4 has failed, and the display unit 9 displays the failure. The maintenance of the internal fan 4 is promoted, and the safety can be ensured continuously by performing repairs.

(Embodiment 2)
Hereinafter, a second embodiment of the vending machine according to the present invention will be described with reference to the drawings. The same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 4 is a side sectional view of a vending machine according to the second embodiment of the present invention. FIG. 5 is a block diagram of a vending machine according to Embodiment 2 of the present invention. FIG. 6 is a flowchart showing the operation of the embodiment.

  In the figure, the internal temperature detection means 15 is attached to the lower part of the storage shelf 2 and is, for example, a thermistor. The comparison determination means 12a compares and determines the internal temperature detected by the internal temperature detection means 15 and the temperature of the cooler 3 detected by the cooler temperature detection means 8. The arithmetic control unit 13a displays a failure on the display unit 9 based on a signal from the comparison / determination unit 12a and incorporates the comparison / determination unit 12a. The timer 14a measures time when the temperature difference between the temperature of the cooler 3 and the internal temperature is larger than the comparison determination temperature.

  The operation of the main part of the vending machine configured as described above will be described with reference to the flowchart of FIG.

  First, in step 7, the cooler temperature detecting means 8 detects the temperature Tc of the cooler 3. Next, in step 8, the internal temperature detection means 15 detects the internal temperature Ta, and in step 9, the temperature difference Tx between the cooler 3 temperature Tc and the internal temperature Ta is preset by the comparison determination means 12a. A comparison determination is made with a predetermined determination temperature T2. If the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is smaller than T2, the process returns to Step 7. If the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is larger than T2, a predetermined time is measured by the timer 14a in step 10 and cooled again by the cooler temperature detecting means 8 in step 11. The temperature Tc of the vessel 3 is detected, and in step 12, the internal temperature detection means 15 detects the internal temperature Ta. In step 13, the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is compared with a predetermined determination temperature T2 set in advance by the comparison determination means 12a. If Tx is smaller than T2, return to Step 7. If Tx is greater than T2, it is determined that the internal fan 4 is out of order, and in step 14, the arithmetic control unit 13a displays the failure of the internal fan 4 on the display unit 9.

  That is, when the internal fan 4 fails, the low-temperature and low-pressure gas evaporated by the cooler 3 is not heat-exchanged by the internal fan 4, so the temperature of the cooler 3 decreases. Therefore, the failure of the internal fan 4 can be determined when the difference between the cooler temperature and the internal temperature increases by a predetermined temperature or more for a certain period of time.

  Therefore, since the failure determination is performed when the difference between the temperature of the cooler 3 and the internal temperature becomes larger than the predetermined temperature for a certain time, the failure of the internal fan 4 can be determined more reliably and quickly.

  As described above, the vending machine according to the present embodiment includes the internal temperature detection means 15 at the lower part of the storage shelf 2 and is detected by the internal temperature detected by the internal temperature detection means 15 and the cooler temperature detection means 8. If the temperature difference of the cooler 3 is greater than the predetermined temperature determined for a certain time, it is determined that the internal fan 4 has failed and the failure is displayed on the display unit 9. Since the temperature difference of the cooler temperature is taken into account, the operation can be performed more reliably and quickly. When the internal fan 4 fails, the display unit 9 displays a failure to promote maintenance, and repairs continue to ensure safety. Can be secured.

(Embodiment 3)
The third embodiment of the vending machine according to the present invention will be described below with reference to the drawings. The same components as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 7 is a side sectional view of a vending machine according to the third embodiment of the present invention. FIG. 8 is a block diagram of a vending machine according to Embodiment 3 of the present invention. FIG. 9 is a flowchart showing the operation of the embodiment.

  In the figure, the alarm lamp 16 is attached to the door 10. The comparison determination means 12a compares and determines the internal temperature detected by the internal temperature detection means 15 and the temperature of the cooler 3 detected by the cooler temperature detection means 8. The arithmetic control unit 13a displays a failure on the display unit 9 based on a signal from the comparison / determination unit 12a and lights or blinks the alarm lamp 16, and incorporates the comparison / determination unit 12a.

  The operation of the main part of the vending machine configured as described above will be described with reference to the flowchart of FIG.

  First, in step 15, the temperature Tc of the cooler 3 is detected by the cooler temperature detecting means 8. Next, in step 16, the internal temperature detection means 15 detects the internal temperature Ta, and in step 17, the temperature difference Tx between the cooler 3 temperature Tc and the internal temperature Ta is preset by the comparison determination means 12a. A comparison determination is made with a predetermined determination temperature T2. If the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is smaller than T2, the process returns to step 15. If the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is larger than T2, a predetermined time is measured by the timer 14a in step 18 and cooled again by the cooler temperature detecting means 8 in step 19. The temperature Tc of the container 3 is detected, and in step 20, the internal temperature detection means 15 detects the internal temperature Ta. In step 21, the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is compared with a predetermined determination temperature T2 preset by the comparison determination means 12a. If Tx is smaller than T2, the process returns to step 15. If Tx is greater than T2, it is determined that the internal fan 4 is out of order, and in step 22, the arithmetic control unit 13a displays the failure of the internal fan 4 on the display unit 9. Further, in step 23, the alarm lamp 16 is turned on or blinked by the arithmetic control unit 13a.

  That is, when the internal fan 4 fails, the low-temperature and low-pressure gas evaporated by the cooler 3 is not heat-exchanged by the internal fan 4, so the temperature of the cooler 3 decreases.

  Therefore, since the failure determination is performed when the difference between the temperature of the cooler 3 and the internal temperature becomes larger than the predetermined temperature for a certain time, the failure of the internal fan 4 can be determined more reliably and quickly. When a failure occurs, the failure is displayed on the display unit 9 and the alarm lamp 16 is lit or blinked, so that the failure can be surely notified.

  As described above, the vending machine according to the present embodiment includes the internal temperature detection means 15 at the lower part of the alarm lamp 16 and the storage shelf, and the internal temperature and the cooler temperature detection means detected by the internal temperature detection means 15. When the temperature difference of the cooler 3 detected in step 8 becomes larger than a predetermined temperature for a certain time, it is determined that the internal fan 4 has failed, the failure is displayed on the display unit 9, and the alarm lamp 16 is turned on or blinking to open the door. When 10 is opened, it is possible to clearly know the failure at a glance, promote maintenance, and perform maintenance to ensure safety continuously.

(Embodiment 4)
Hereinafter, a fourth embodiment of the vending machine according to the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected about the same structure as Embodiment 1, Embodiment 2, and Embodiment 3, and detailed description is abbreviate | omitted.

  FIG. 10 is a side sectional view of a vending machine according to the fourth embodiment of the present invention. FIG. 11 is a block diagram of a vending machine according to Embodiment 4 of the present invention. FIG. 12 is a flowchart showing the operation of the embodiment.

  In the figure, the alarm buzzer 17 is attached to the door 10. The comparison determination means 12a compares and determines the internal temperature detected by the internal temperature detection means 15 and the temperature of the cooler 3 detected by the cooler temperature detection means 8. The arithmetic control unit 13a displays a failure on the display unit 9 based on a signal from the comparison / determination unit 12a and sounds an alarm buzzer 17, and incorporates the comparison / determination unit 12a.

  The operation of the essential parts of the vending machine configured as described above will be described with reference to the flowchart of FIG.

  First, in step 24, the temperature Tc of the cooler 3 is detected by the cooler temperature detecting means 8. Next, in step 25, the internal temperature detection means 15 detects the internal temperature Ta, and in step 26, the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is preset by the comparison determination means 12. A comparison determination is made with a predetermined determination temperature T2. If the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is smaller than T2, the process returns to step 24. If the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is larger than T2, a fixed time is measured by the timer 14a at step 27, and the cooling by the cooler temperature detecting means 8 is again performed at step 28. The temperature Tc of the container 3 is detected, and in step 29, the internal temperature detection means 15 detects the internal temperature Ta. In step 30, the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is compared with a predetermined determination temperature T2 set in advance by the comparison determination means 12a. If Tx is smaller than T2, the process returns to step 24. If Tx is greater than T2, it is determined that the internal fan 4 is out of order, and in step 31, the arithmetic control unit 13a displays the failure of the internal fan 4 on the display unit 9. Further, in step 32, the alarm buzzer 17 is sounded by the arithmetic control unit 13a.

  That is, when the internal fan 4 fails, the low-temperature and low-pressure gas evaporated by the cooler 3 is not heat-exchanged by the internal fan 4, so the temperature of the cooler 3 decreases.

  Therefore, since the failure determination is performed when the difference between the temperature of the cooler 3 and the internal temperature becomes larger than the predetermined temperature for a certain time, the failure of the internal fan 4 can be determined more reliably and quickly. When a failure occurs, the failure can be displayed on the display unit 9 and the alarm buzzer 17 can be sounded to reliably notify the failure.

  As described above, the vending machine according to the present embodiment includes the alarm buzzer 17 and the internal temperature detection means 15 at the lower part of the storage shelf 2, and the internal temperature and the cooler temperature detection detected by the internal temperature detection means 15. When the temperature difference of the cooler 3 detected by the means 8 becomes larger than a predetermined temperature for a certain time, it is determined that the fan 4 in the cabinet has failed, the failure is displayed on the display unit 9, and the alarm buzzer 17 is sounded to close the door. Even in a state of failure, it is possible to ensure safety by making sure of a failure by sound, prompting maintenance, and performing repairs.

(Embodiment 5)
Hereinafter, a fifth embodiment of the vending machine according to the present invention will be described with reference to the drawings. The same components as those in the first to fourth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 13 is a block diagram of a vending machine according to the fifth embodiment of the present invention. FIG. 14 is a flowchart showing the operation of the embodiment.

  In the figure, the comparison / determination means 12a compares and determines the internal temperature detected by the internal temperature detection means 15 and the temperature of the cooler 3 detected by the cooler temperature detection means 8. The arithmetic control unit 13a displays a failure on the display unit 9 on the basis of a signal from the comparison / determination unit 12a and stops energization of the cooling device 6, and incorporates the comparison / determination unit 12a.

  The operation of the main part of the vending machine configured as described above will be described with reference to the flowchart of FIG.

  First, in step 33, the cooler temperature detecting means 8 detects the temperature Tc of the cooler 3. Next, in step 34, the internal temperature detection means 15 detects the internal temperature Ta, and in step 35, the temperature difference Tx between the cooler 3 temperature Tc and the internal temperature Ta is preset by the comparison determination means 12a. A comparison determination is made with a predetermined determination temperature T2. If the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is smaller than T2, the process returns to step 33. If the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is larger than T2, a predetermined time is measured by the timer 14a at step 36, and the cooling by the cooler temperature detecting means 8 is again performed at step 37. The temperature Tc of the container 3 is detected, and in step 38, the internal temperature detection means 15 detects the internal temperature Ta. In step 39, the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is compared and determined with a predetermined determination temperature T2 set in advance by the comparison determination means 12a. If Tx is smaller than T2, the process returns to step 33. When Tx is larger than T2, it is determined that the internal fan 4 is in failure, and in step 40, the operation control unit 13a displays the failure of the internal fan 4 on the display unit 9. Further, in step 41, power supply to the cooling device 6 is stopped.

  Controlled electrical components of the cooling device 6 include a solenoid valve (not shown) in the case where a plurality of storage chambers 1 are provided in addition to the compressor (not shown) and the internal fan 4. Everything will stop.

  That is, when the internal fan 4 fails, the low-temperature and low-pressure gas evaporated by the cooler 3 is not heat-exchanged by the internal fan 4, so the temperature of the cooler 3 decreases.

  Therefore, since the failure determination is performed when the difference between the temperature of the cooler 3 and the internal temperature becomes larger than the predetermined temperature for a certain time, the failure of the internal fan 4 can be determined more reliably and quickly. Can be displayed on the display unit 9 and the power to the cooling device 6 can be stopped.

  As described above, the vending machine according to the present embodiment includes the internal temperature detection means 15 at the lower part of the storage shelf, and the internal temperature detected by the internal temperature detection means 15 and the cooler temperature detection means 8 detect it. When the difference in temperature of the cooler 3 becomes larger than a predetermined temperature for a certain time, it is determined that the fan 4 in the cabinet has failed, the failure is displayed on the display unit 9 and energization to the cooling device 6 is stopped. The maintenance of the internal fan 4 is promoted, and the safety can be ensured continuously by performing repairs.

(Embodiment 6)
Hereinafter, Embodiment 6 of the vending machine according to the present invention will be described with reference to the drawings. The same components as those in the first to fifth embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 15 is a side sectional view of a vending machine according to the sixth embodiment of the present invention. FIG. 16 is a block diagram of a vending machine according to the sixth embodiment of the present invention. FIG. 17 is a flowchart showing the operation of the embodiment.

  In the figure, a product selection button 18 is provided on the surface of the door 10 and is used for selecting a product at the time of sale. The product selection button 18 can also display a sold-out display corresponding to each product. The comparison determination means 12a compares and determines the internal temperature detected by the internal temperature detection means 15 and the temperature of the cooler 3 detected by the cooler temperature detection means 8. The arithmetic control unit 13a displays a failure on the display unit 9 based on the signal from the comparison determination means 12a, displays a sold-out display on the product selection button 18 in the cooling setting store, and further stops the sale of the product in the cooling setting store. What is performed is one that incorporates the comparison determination means 12a.

  The operation of the essential parts of the vending machine configured as described above will be described with reference to the flowchart of FIG.

  First, in step 42, the cooler temperature detecting means 8 detects the temperature Tc of the cooler 3. Next, in step 43, the internal temperature detection means 15 detects the internal temperature Ta, and in step 44, the temperature difference Tx between the cooler 3 temperature Tc and the internal temperature Ta is preset by the comparison determination means 12. A comparison determination is made with a predetermined determination temperature T2. If the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is smaller than T2, the process returns to step 42. If the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is larger than T2, a predetermined time is measured by the timer 14a at step 45, and the cooling by the cooler temperature detecting means 8 is performed again at step 46. The temperature Tc of the container 3 is detected, and in step 47, the internal temperature detection means 15 detects the internal temperature Ta. In step 48, the temperature difference Tx between the temperature Tc of the cooler 3 and the internal temperature Ta is compared with a predetermined determination temperature T2 set in advance by the comparison determination means 12. If Tx is smaller than T2, the process returns to step 42. If Tx is greater than T2, it is determined that the internal fan 4 is in failure, and in step 49, the operation control unit 13a displays the failure of the internal fan 4 on the display unit 9. Further, in step 50, the sold-out display is performed on the product selection button 18 in the cooling setting store, and the sale of the products in the cooling setting store is stopped.

  When the vending machine is provided with a plurality of storage rooms 1, there are cases where cooling and heating settings can be set. Only storage rooms with temperature settings can be sold.

  That is, when the internal fan 4 fails, the low-temperature and low-pressure gas evaporated by the cooler 3 is not heat-exchanged by the internal fan 4, so the temperature of the cooler 3 decreases.

  Therefore, since the failure determination is performed when the difference between the temperature of the cooler 3 and the internal temperature becomes larger than the predetermined temperature for a certain time, the failure of the internal fan 4 can be determined more reliably and quickly. In the case of the failure, the failure can be displayed on the display unit 9, the sold-out display can be displayed on the product selection button 18 in the cooling setting store, and the sale of the product in the cooling setting store can be stopped.

  As described above, the vending machine according to the present embodiment includes the internal temperature detection means 15 at the lower part of the storage shelf, and the internal temperature detected by the internal temperature detection means 15 and the cooler temperature detection means 8 detect it. When the difference in temperature of the cooler 3 becomes larger than a predetermined temperature for a certain time, it is determined that the internal fan 4 is out of order and a failure is displayed on the display unit 9 and a sold-out display is displayed on the product selection button 18 in the cooling setting storage. In addition, the sale of products in the cooling setting cabinet will be stopped. By stopping the sale, anyone can immediately be informed of the abnormal state, and more quickly and reliably when the fan in the warehouse has failed. The maintenance of the internal fan 4 is promoted, and the safety can be ensured continuously by performing repairs.

  As described above, the vending machine according to the present invention determines failure detection of the internal fan motor from the temperature of the cooler and can be applied to a refrigerator and a showcase.

Side surface sectional drawing of the vending machine in Embodiment 1 of this invention Block diagram of a vending machine in Embodiment 1 of the present invention Flowchart of vending machine in Embodiment 1 of the present invention Side sectional view of vending machine according to Embodiment 2 and Embodiment 5 of the present invention Block diagram of vending machine according to Embodiment 2 of the present invention Flowchart of vending machine in Embodiment 2 of the present invention Side sectional view of the vending machine according to Embodiment 3 of the present invention. Block diagram of a vending machine in Embodiment 3 of the present invention Flowchart of vending machine in Embodiment 3 of the present invention Side sectional view of the vending machine according to Embodiment 4 of the present invention. Block diagram of vending machine according to Embodiment 4 of the present invention Flowchart of vending machine in Embodiment 4 of the present invention Block diagram of vending machine according to Embodiment 5 of the present invention Flowchart of vending machine in Embodiment 5 of the present invention Side sectional view of the vending machine according to the sixth embodiment of the present invention. Block diagram of a vending machine according to Embodiment 6 of the present invention Flowchart of vending machine in Embodiment 6 of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Storage room 2 Storage shelf 3 Cooler 4 Inside fan 6 Cooling device 7 Combustible refrigerant 8 Cooler temperature detection means 9 Display part 12, 12a Comparison judgment means 13, 13a Calculation control part 15 Inside temperature detection means 16 Alarm lamp 17 Alarm buzzer 18 Product selection button

Claims (6)

Cooling device comprising a heat-insulating storage chamber for storing products, a storage shelf for storing products in the storage chamber, a cooler for cooling the storage chamber, an internal fan for circulating air in the storage chamber, and a flammable refrigerant And a cooler temperature detecting means provided in the cooler, and when the cooler temperature detecting means is below a predetermined temperature for a certain period of time, it is determined that the internal fan has failed, and the failure is displayed on the display unit. Vending machine characterized by It is characterized by comprising an internal temperature detection means provided in the storage room, and when the temperature difference from the cooler temperature detection means is greater than a predetermined temperature, it is determined that the internal fan has failed and a failure is displayed on the display unit. The vending machine according to claim 1. If the temperature difference from the cooler temperature detecting means is greater than a predetermined temperature, it is determined that the internal fan has failed, and the alarm lamp is turned on or blinked. The vending machine according to claim 1 or 2, characterized in that Provided with an alarm buzzer, provided with the internal temperature detection means, and when the temperature difference with the cooler temperature detection means is larger than a predetermined temperature, it is determined that the internal fan has failed, and the alarm buzzer is sounded The vending machine according to claim 1 or 2. When the temperature difference with the cooler temperature detection means is greater than a predetermined temperature, the internal temperature detection means is provided, and it is determined that the internal fan has failed, and the power supply to the cooling device is stopped. The vending machine according to any one of claims 1 to 4. When the temperature difference with the cooler temperature detection means is greater than a predetermined temperature, the internal temperature detection means is determined, it is determined that the internal fan has failed, a sold-out display is displayed on the product selection button on the door, and the cooling setting storage The vending machine according to any one of claims 1 to 5, wherein the vending machine is stopped.

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