JP5202055B2 - Vending machine cooling and heating device - Google Patents

Description

  The present invention relates to a cooling and heating device for a vending machine.

  Vending machines such as can drinks and PET bottle drinks that sell products in a cooled state (referred to as COLD) and a heated state (referred to as HOT) are widely known. In this type of vending machine, a product is stored in a product storage room having an individual heat insulation structure, and the temperature is adjusted until it reaches an appropriate temperature (a cooling state or a heating state within a predetermined temperature range).

  Generally, in this type of vending machine, as shown in FIGS. 5 and 6, a set of a plurality of evaporators 4 (for example, evaporators 4A, 4B, and 4C) connected in parallel along a refrigerant flow path. A cooling heat pump (sometimes called a heat pump cycle or a refrigeration cycle) 5 is provided, one evaporator 4 is provided in each product storage chamber 3, and the product storage chamber 3 to be cooled is evaporated. A refrigerant is supplied to the container 4 to cool the inside of the product storage chamber 3. Further, the product storage chamber 3 (3A, 3B) to be heated is provided with a sheathed heater 6 as a heating means, and when heating, the corresponding product storage chamber 3 (3A, 3B) The sheathed heater 6 is energized and heated. 5 and 6, 7 is an internal fan, 8 is a capillary tube as an expansion mechanism, 9 is a compressor, 10 is a condenser, 11 is an external fan, and 12 is the outside of the vending machine. The outside of the warehouse with circulation, 13a to 13i are refrigerant flow paths (cooling refrigerant flow paths), 14a to 14c are refrigerant open / close valves such as solenoid valves, and the internal blower fan 7 and capillary tube 8 2, each of the product storage chambers 3 (3 </ b> A to 3 </ b> C), and the compressor 9, the condenser 10, and the outside fan 11 are arranged one by one on the outside 12. Although not shown, each product storage chamber 3 has a built-in temperature sensor that detects the temperature in each product storage chamber 3.

  When the product storage chamber 3 (3A to 3C) is cooled, the on-off valves 14a to 14c corresponding to the product storage chamber 3 (3A to 3C) to be cooled are opened, and the evaporator 4 (4A to 4C) is opened. ) Is allowed to cool by introducing a refrigerant and evaporating it. Further, when the product storage chamber 3 (3A to 3C) is heated, the sheathed heater 6 corresponding to the product storage chamber 3 (3A, 3B) to be heated is energized to perform the heating operation.

  Here, the sheathed heater 6 as the heating means has a drawback that it cannot promote energy saving of the vending machine because power consumption (input energy) with respect to the amount of heat (output energy) to be heated is extremely large. As a method for coping with this, as shown in FIG. 3, as shown in FIG. 3, for heating, a so-called reverse cycle type (a method in which the refrigerant flows in a direction opposite to the general direction) that absorbs heat outside the chamber 12 and generates heat inside the chamber 2. It is conceivable to additionally provide a warm heat pump (sometimes called a heat pump cycle or a refrigeration cycle) 15. That is, as shown in FIG. 3, a compressor 16, an evaporator 17, a capillary tube 18 as an expansion mechanism, and an outside fan 11 are arranged outside the box 12, and in a predetermined product storage chamber 3 (3 </ b> A). A heating condenser 19 of the heating heat pump 15 is disposed, and the product storage chamber 3 (3A) is heated by the heat dissipated by the heating condenser 19. Since this type of heating heat pump 15 consumes less power (input energy) with respect to the output energy, the heating heater 15 is operated to heat the product storage chamber 3 (3A), so that the sheathed heater 6 Compared with the case of heating only with this, power consumption can be suppressed. In addition, 26a-26c in FIG. 3 is a refrigerant flow path (heating refrigerant flow path).

  In addition to this configuration, it is conceivable to arrange the evaporator 17 of the heating heat pump 15 on the downstream side in the air flow direction of the condenser 10 of the cooling heat pump 5 outside the refrigerator 12. According to this configuration, the exhaust heat from the condenser 10 of the cooling heat pump 5 can be recovered by the evaporator 17 of the heating heat pump 15, and the evaporation temperature can be raised to improve the thermal efficiency.

  A configuration similar to that shown in FIG. 3 is disclosed in FIGS. In this patent document 1, as shown in FIG. 7, the condenser 71 of the cooling heat pump and the evaporator 72 of the heating heat pump are located in a space near the front side of the exterior 70 and the compressor 73 of the cooling heat pump. And the compressor 74 of the heat pump for heating are disposed in a space closer to the rear side of the exterior 70.

Further, FIG. 3 of Patent Document 1 proposes that a heating evaporator is incorporated in a cooling compressor as a means for improving thermal efficiency.
JP 2006-146751 A

  As shown in FIG. 3, a heating heat pump 15 is provided in addition to the cooling heat pump 5, or an evaporator 17 of the heating heat pump 15 is provided downstream in the air flow direction of the condenser 10 of the cooling heat pump 5. Although the thermal efficiency can be improved to some extent by disposing, it is difficult to further improve the thermal efficiency. As another means, as disclosed in FIG. 3 of Patent Document 1, if the heating evaporator is built in the cooling compressor, a custom-made compressor must be manufactured. The manufacturing cost is greatly increased. Moreover, since there is a high possibility that oil circulating in the compressor will adhere to the heating evaporator, the thermal efficiency may actually decrease instead.

  It is also conceivable to combine the configuration shown in FIG. 3 and the technology disclosed in FIG. 3 of Patent Document 1 for incorporating the heating evaporator in the cooling compressor. The cooling compressor incorporating the heating evaporator is disposed downstream of the condenser of the cooling heat pump in the air flow direction. However, with this structure, it is difficult to think that the heat from the condenser of the cooling heat pump is transferred to the evaporator of the heating heat pump in the compressor, and it is considered that the thermal efficiency cannot be substantially improved.

  SUMMARY OF THE INVENTION The present invention solves the above-described problems, and an object of the present invention is to provide a cooling and heating device for a vending machine that can further improve thermal efficiency without causing a significant increase in manufacturing cost. .

In order to solve the above problems, the present invention provides a plurality of individually insulated product storage rooms, a cooling heat pump that cools the product storage room to a cooled state, and a heating unit that heats the product storage room to a warmed state. A cooling and heating device for a vending machine provided with a heat pump for heating, a condenser and a compressor for cooling heat pump, and an evaporator and a compressor for heating heat pump, A cooling heat pump condenser, at least a cooling heat pump compressor, and a heating heat pump evaporator are arranged in this order from the upstream side along the air flow direction outside the chamber.

  With this configuration, the air heated by the exhaust heat of the condenser of the cooling heat pump is further heated by contacting the compressor of the cooling heat pump. Therefore, the evaporation temperature in the evaporator of the heating heat pump can be raised satisfactorily, and the thermal efficiency can be further improved. In addition, according to this configuration, a general type of compressor or the like can be used, so that the manufacturing cost is not significantly increased. Moreover, since the cooling operation by the cooling heat pump is performed throughout the year regardless of the season, the air can be satisfactorily heated by the compressor of the cooling heat pump.

  In addition, the present invention is characterized in that a space from the condenser of the cooling heat pump to the evaporator of the heating heat pump, including the installation space of the compressor of the cooling heat pump, is covered with a cover member.

  With this configuration, the exhaust heat from the condenser outside the cooling heat pump and the air heated by the compressor of the cooling heat pump are not diffused outside by the cover member, and the evaporator side of the heating heat pump can be satisfactorily The thermal efficiency can be further improved.

As described above, according to the present invention, the condenser of the cooling heat pump, at least the compressor of the cooling heat pump, and the evaporator of the heating heat pump are arranged in this order from the upstream side along the air flow direction outside the warehouse. As a result, the evaporation temperature in the evaporator of the heating heat pump can be further increased, the thermal efficiency can be further improved, and the power consumption can be reduced. Since a machine or the like can be used, the manufacturing cost is not significantly increased.

  Moreover, the thermal efficiency can be further improved by covering the space from the condenser of the cooling heat pump to the evaporator of the heating heat pump including the installation space of the compressor of the cooling heat pump with the cover member.

  Hereinafter, a cooling and heating device for a vending machine according to an embodiment of the present invention will be described with reference to the drawings. In addition, the cooling and heating device of the vending machine according to the embodiment of the present invention is the same as that shown in FIG. 3 with respect to the circuit configuration of the refrigerant. Description is omitted.

  Also in the cooling and heating device of this vending machine, as shown in FIG. 3, the plurality of individually insulated product storage chambers 3 (3A to 3C) and the product storage chamber 3 (3A to 3C) are cooled. A cooling heat pump 5 that cools the product storage chamber 3 (3A) and a heating heat pump 15 that heats the interior of the product storage chamber 3 (3A) in a heated state. A condenser 10 and a compressor 9 of the cooling heat pump 5 and an evaporator 17 of the heating heat pump 15 are arranged. However, in particular, as shown in FIGS. 1 and 2, the condenser 10 of the cooling heat pump 5, the compressor 9 of the cooling heat pump 5, and the heating heat pump from the upstream side along the air flow direction in the exterior 12. Fifteen evaporators 17 are arranged in this order.

  More specifically, the condenser 10 of the cooling heat pump 5 is disposed in the vicinity of the front end portion in the space outside the refrigerator 12, and immediately outside it, the outside fan 11 sucks air from the front and sends it to the rear. Are arranged side by side, the compressor 9 of the cooling heat pump 5 is disposed behind the external fan 11, and the heating heat pump is disposed at the rear of the compressor 9 of the cooling heat pump 5. Fifteen evaporators 17 are arranged. The compressor 16 of the heating heat pump 15 is slightly displaced in the left-right direction from the condenser 10 of the cooling heat pump 5, the compressor 9 of the cooling heat pump 5, and the evaporator 17 of the heating heat pump 15. In this embodiment, it is arranged at a position on the left side of the vending machine.

  In addition, the space from the condenser 10 of the cooling heat pump 5 to the evaporator 17 of the heating heat pump 15 including the arrangement space of the compressor 9 of the cooling heat pump 5 is formed by the upper surface portion and the side surface portion of the cover member 41. Covered. Thus, the air sucked through the condenser 10 of the cooling heat pump 5 by the outside fan 11 passes through the periphery of the compressor 9 of the cooling heat pump 5 without diffusing outside, and the heating heat pump 15 is heated. The evaporator 17 is configured to flow into the location where the evaporator 17 is disposed.

  According to the above configuration, the outside air 12 sends the air sucked to the lower part of the vending machine backward by the outside fan 11. At this time, the exhaust heat of the condenser 10 of the cooling heat pump 5 is exhausted. The air that has been heated in this way is further heated by coming into contact with the compressor 9 of the cooling heat pump 5, and this heated air is introduced into the evaporator 17 of the heating heat pump 15 and heated. Therefore, the evaporation temperature in the evaporator 17 of the heating heat pump 15 is simply set to be lower than that in the case where the evaporator 17 of the heating heat pump 15 is disposed downstream of the condenser 10 of the cooling heat pump 5 in the air flow direction. It is possible to further increase the thermal efficiency of the heating heat pump 15 and thus reduce the power consumption of the vending machine.

  According to the above configuration, since a general type compressor can be used as the compressor 9 of the cooling heat pump 5, the manufacturing cost can be reduced as in the case where the heating evaporator is built in the cooling compressor. There is no significant increase, and the manufacturing cost can be reduced.

  Moreover, since the cooling operation by the cooling heat pump 5 is performed throughout the year regardless of the season, the air can be favorably heated by the compressor 9 of the cooling heat pump 5. That is, instead of the compressor 9 of the cooling heat pump 5, the compressor 16 of the heating heat pump 15 may be disposed between the condenser of the cooling heat pump and the evaporator of the heating heat pump. However, in this case, since the driving rate of the compressor of the heating heat pump is lower than that of the compressor of the cooling heat pump, the heating time by the compressor is reduced, and there is a possibility that the thermal efficiency is lowered. On the other hand, according to the said structure, such a malfunction does not arise.

  In addition, not only the compressor 9 of the cooling heat pump 5 but also the compressor 16 of the heating heat pump 15 is disposed between the condenser 10 of the cooling heat pump 5 and the evaporator 17 of the heating heat pump 15. In this case, the air heated by the exhaust heat of the condenser 10 of the cooling heat pump 5 is not only used by the compressor 9 of the cooling heat pump 5 but also by the compressor 16 of the heating heat pump 15. Therefore, the evaporation temperature in the evaporator 17 of the heating heat pump 15 may be further increased, and the thermal efficiency of the heating heat pump 15 can be further improved. However, in this case, since the two compressors 9 and 16 are disposed between the condenser 10 of the cooling heat pump 5 and the evaporator 17 of the heating heat pump 15, It is necessary to devise so that the resistance does not become too large.

  Further, as described above, the cover member 41 covers the space from the condenser 10 of the cooling heat pump 5 to the evaporator 17 of the heating heat pump 15 including the arrangement space of the compressor 9 of the cooling heat pump 5. Thereby, thermal efficiency can be improved more.

  In the above embodiment, the case where the external fan 11 is disposed immediately behind the condenser 10 of the cooling heat pump 5 is described. However, the present invention is not limited to this, and the condenser 10 of the cooling heat pump 5, As long as air can be sent in the order of the compressor 9 of the cooling heat pump 5 and the evaporator 17 of the heating heat pump 15, they may be arranged at any position.

  Moreover, although the said embodiment described only the case where it had only the cooling function which cools each goods storage chamber 3 (3A-3C) as the heat pump 5, it does not restrict to this. For example, as shown in FIG. 4, the product storage chamber 3 </ b> B is provided with a heating heat exchanger 31 used as a condenser, and a second coolant is sent to the heating heat exchanger 31 to send a heating refrigerant. The heating heat exchanger 31 of the product storage chamber 3B is used as a heating condenser, and the heating refrigerant flow paths 32a and 32b and electromagnetic as the flow path switching means for switching the flow direction of the flow path. On / off valves 33a and 33b including valves are provided, and in the heat pump 30, the refrigerant flow paths 13a to 13i, 32a, and 32b are switched using the on-off valves 33a and 33b and the heat pump 30 is used for cooling. The arrangement (the condenser 10 of the heat pump 5 and the heating heater) can be switched between the case of use and the case of use for heating (used as a so-called exhaust heat type heat pump). Between the evaporator 17 of the pump 15, not only the compressor 9 of the heat pump 5, the compressor 16 for heating the heat pump 15 is also applicable that) be disposed.

1 is a schematic side sectional view of a vending machine according to an embodiment of the present invention. It is a top view of the outside location of the vending machine. It is a refrigerant circuit diagram of the cooling and heating device of the vending machine including the embodiment of the present invention. It is a refrigerant circuit figure of the cooling and heating apparatus of the vending machine which concerns on other embodiment of this invention. It is a schematic side sectional view of a conventional vending machine. It is a refrigerant circuit diagram of the cooling and heating device of a conventional vending machine. It is a rough principal part side sectional view of other conventional vending machines.

Explanation of symbols

2 Chamber 3 (3A-3C) Commodity storage room 4 (4A-4C) Evaporator 5 Cooling heat pump 6 Sheath heater 7 Blower fan 8 Capillary tube (expansion mechanism)
9 Compressor 10 Condenser 12 Outside 15 Heating Heat Pump 16 Compressor 17 Evaporator 18 Capillary Tube (Expansion Mechanism)
19, 31 Condenser 30 Heat pump 41 Cover member

Claims (2)

A plurality of individually insulated product storage rooms, a cooling heat pump that cools the product storage room to a cooled state, and a heating heat pump that heats the product storage room to a heated state,
A cooling and heating device of a vending machine in which a condenser and a compressor of a heat pump for cooling and an evaporator and a compressor of a heat pump for heating are arranged outside the cabinet,
A vending machine characterized by being arranged in the order of the condenser of the cooling heat pump, at least the compressor of the cooling heat pump, and the evaporator of the heating heat pump from the upstream side along the air flow direction outside the chamber. Machine for cooling and heating. 2. A vending machine as set forth in claim 1, wherein a space from the condenser of the cooling heat pump to the evaporator of the heating heat pump, including the installation space of the compressor of the cooling heat pump, is covered with a cover member. Machine for cooling and heating.

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