JP2010250589A - Vending machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vending machine equipped with an independent cooling system and an independent cooling/heating system in which functional components in the machine chamber are arranged, in such a manner as to improve the inside cooling efficiency in the cooling system and the inside heating efficiency in the cooling/heating system. <P>SOLUTION: The vending machine includes in the machine chamber 52: a first compressor 53 and a first heat exchanger 54 connected to a cooling/heating cycle for cooling or heating the inside of the vending machine; a flow path switching valve 55 for switching the flow path of refrigerant; and a second compressor 56 and a condenser 57, connected to a cooling cycle for cooling the inside of the vending machine. The first heat exchanger 54 and the condenser 57 are arranged adjacent to each other in the front of the machine chamber 52, and the first compressor 53 and the second compressor 56 are arranged, side by side inside of the back of the machine chamber 52. The flow path switching valve 55 is arranged side by side in the front of the machine chamber 52, and its solenoid part 66 is arranged in an integrated manner. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a vending machine that sells products such as cans and bottled beverage products after cooling or heating.

Conventionally, this type of vending machine has been proposed with a cooling and heating system for the purpose of energy saving. (See Patent Document 1)
FIG. 5 shows a refrigerant circuit diagram of a conventional vending machine described in Patent Document 1. As shown in FIG. As shown in the figure, the interior of the vending machine is divided into three parts, and is a dedicated cooling compartment (hereinafter referred to as the left chamber), a cooling / heating chamber B (hereinafter referred to as the middle chamber), and a cooling / heating chamber C (hereinafter referred to as the right chamber). 1) (specific usage side unit), usage side unit 1B and usage side unit 1C, which will be described in detail later, are provided, and each unit is provided with a blower. The heat source side unit 2 and the blower 20 are provided outside the vending machine. The heat source side unit 2 and the use side units 1A to 1C constitute a cooling and heating device for a vending machine.

  Next, the refrigerant circuit will be described. The heat source side unit 2 includes a compressor 18, a heat source side heat exchanger 19, a gas-liquid separator 21, and the use side units 1A, 1B, and 1C include the use side heat exchangers 12A, 12B. And 12C. Then, the heat source side heat exchanger 19 is branched and connected to the refrigerant discharge pipe 3 and the refrigerant suction pipe 4 of the compressor 18 with the switching valves 5A and 5B, while the heat source side unit 2 and the use side units 1A, 1B and 1C are connected. The inter-unit pipe 6 to be connected is composed of a high pressure gas pipe 7 branchedly connected to the refrigerant discharge pipe 3, a low pressure gas pipe 8 branchedly connected to the refrigerant suction pipe 4, and a liquid pipe 9.

  The use side heat exchanger 12A of the use side unit 1A is connected to the low pressure gas pipe 8 and to the liquid pipe 9 via a refrigerant flow control valve 14 such as an electric expansion valve. Further, the use side heat exchangers 12B and 12C of the use side units 1B and 1C are branched and connected to the high pressure gas pipe 7 and the low pressure gas pipe 8 through switching valves 10A, 10B, 11A and 11B, respectively, and the liquid pipe 9 Are connected via refrigerant flow control valves 15 and 16 such as electric expansion valves.

  A refrigerant flow control valve 17 such as an electric expansion valve is interposed in the liquid pipe 9. Further, since the left chamber only performs cooling, the use side unit 1A is not provided with the switching valves 10A, 10B, 11A, and 11B such as the use side units 1B and 1C, but the switching valves are the refrigerant discharge pipe 3 and the refrigerant suction pipe. 4 may be branched and connected to enable heating. Furthermore, the left chamber may be a dedicated heating chamber. In this case, the use side heat exchanger 12A is naturally connected to the high pressure gas pipe 7.

  Here, as for the capacity of each heat exchanger of the conventional example, when the capacity of the use side heat exchanger 12B is 1, the capacity of the use side heat exchanger 12C is 2, the capacity of the use side heat exchanger 12A is 3, The capacity of the heat source side heat exchanger 19 is set to be 6.

  Next, FIG. 6 shows a configuration diagram of a control device for a conventional vending machine described in Patent Document 1. In FIG. As shown in FIG. 6, the control device C is configured by a general-purpose microcomputer 22, and has a product selection button on the input side and temperature detection means attached to each of the left chamber, the middle chamber, and the right chamber. Temperature sensors 23A, 23B, and 23C are connected. Further, on the output side of the microcomputer 22, each switching valve 5A, 5B, 10A, 10B, 11A, 11B, each refrigerant flow control valve 14, 15, 16, a refrigerant flow control valve 17, a compressor 18, Each blower and each product carry-out device are connected.

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

  First, the case where goods are cooled using all of the left chamber, the middle chamber, and the right chamber as a refrigerator will be described. When the temperatures detected by the temperature sensors 23A, 23B, and 23C are equal to or higher than the cooling set temperature, the microcomputer 22 opens the switching valve 5A of the refrigerant discharge pipe 3 of the heat source side heat exchanger 19 and the refrigerant suction pipe 4 The switching valve 5B is closed, the switching valves 10A and 11A of the high pressure gas pipe 7 of the use side heat exchangers 12B and 12C are closed, and the switching valves 10B and 11B of the low pressure gas pipe 8 are opened.

  As a result, the refrigerant discharged from the compressor 18 sequentially flows through the refrigerant discharge pipe 3, the switching valve 5A, and the heat source side heat exchanger 19 to be condensed and liquefied, and then passes through the refrigerant flow control valve 17 and the liquid pipe 9. The refrigerant flow control valves 14, 15, and 16 of the usage-side units 1 </ b> A, 1 </ b> B, and 1 </ b> C are distributed and decompressed here.

  At this time, in the microcomputer 22, the refrigerant flow control valve 17 is fully opened and the throttle amount of the refrigerant flow control valves 14, 15, 16 is adjusted based on the outputs of the temperature sensors 23A, 23B, 23C. After that, the refrigerant that has passed through each refrigerant flow control valve 14, 15, 16 flows into each use side heat exchanger 12A, 12B, 12C and evaporates, and then from the use side heat exchangers 12B, 12C, It enters into the low-pressure gas pipe 8 through the switching valves 10B and 11B, and enters the low-pressure gas pipe 8 as it is from the use side heat exchanger 12A. The refrigerant merged in the low-pressure gas pipe 8 is sucked into the compressor 18 through the refrigerant suction pipe 4 and the gas-liquid separator 21 in order.

  Thus, in this case, the heat source side heat exchanger 19 acts as a condenser, and the all use side heat exchangers 12A, 12B, and 12C act as evaporators. Will be cooled at the same time. Moreover, since the capacity | capacitance of the heat source side heat exchanger 19 becomes substantially equal to the sum total of the capacity | capacitance of all the utilization side heat exchangers 12A-12C as mentioned above, from utilization side heat exchanger 12A, 12B, 12C which acts as an evaporator. Can be sufficiently dissipated by the heat source side heat exchanger 19. Next, the case where the left chamber and the middle chamber are cooled while the right chamber is heated will be described.

  For example, when the temperature detected by the temperature sensors 23A and 23B is equal to or higher than the cooling set temperature, the microcomputer 22 opens the switching valve 5A of the heat source side heat exchanger 19, closes the switching valve 5B, and cools the usage side. The switching valve 10A of the heat exchanger 12B is closed, the switching valve 10B is opened, and the switching valve 11A of the use side heat exchanger 12C to be heated is opened, and the switching valve 11B is closed.

  Thereby, a part of the refrigerant discharged from the compressor 18 sequentially flows through the refrigerant discharge pipe 3 and the switching valve 34A to the heat source side heat exchanger 19, and the remaining refrigerant passes through the high-pressure gas pipe 7 and is heated. It flows into the utilization side heat exchanger 12C from the switching valve 11A of the utilization side unit 1C.

  Then, it is condensed and liquefied by the use side heat exchanger 12 </ b> C and the heat source side heat exchanger 19. The refrigerant condensed and liquefied in the heat exchangers 12C and 19 is decompressed by the refrigerant flow control valves 14 and 15 of the usage-side units 1A and 1B via the liquid pipe 9, and then used on the usage-side heat exchangers 12A and 12B. Evaporates and evaporates.

  The microcomputer 22 fully opens the refrigerant flow control valve 16 and the refrigerant flow control valve 17 and adjusts the refrigerant flow control valves 14 and 15 based on the outputs of the temperature sensors 23A and 23B.

The refrigerant that has passed through the use-side heat exchanger 12A flows into the low-pressure gas pipe 8 and the refrigerant that has passed through the use-side heat exchanger 12B passes through the switching valve 10B and then flows into the low-pressure gas pipe 8 to join the refrigerant suction pipe 4, The gas-liquid separator 21 is sequentially sucked into the compressor 18. Thus, in this case, since the use side heat exchanger 12C acts as a condenser, the right chamber is heated and the left and middle chambers are used in the use side heat exchangers 12A and 12B acting as evaporators. It will be cooled.

  During the simultaneous cooling and heating operation, the refrigerant flow control valve 16 of the use side unit 1C is fully opened to prevent refrigerant pressure loss, but the liquid refrigerant pressure in the liquid pipe 9 is not unbalanced. The microcomputer 22 adjusts the pressure with the refrigerant flow control valve 17.

  In this way, in the use side unit 1C, the right ventricle can be heated using the exhaust heat generated when the use side units 1A and 1B are cooled, so that heat recovery and use can be performed efficiently. Efficient operation can be performed. Therefore, compared with the conventional vending machine which heated only with the electric heater, power consumption can be reduced and the running cost can be reduced.

  Next, the case where the left chamber is cooled and the middle chamber and the right chamber are heated will be described.

  When the temperature detected by the temperature sensor 23A is equal to or higher than the cooling set temperature, the microcomputer 22 closes the switching valves 5A and 5B of the heat source side heat exchanger 19 and heats the switching valve of the use side heat exchanger 12B. 10A is opened, the switching valve 10B is closed, the switching valve 11A of the use side heat exchanger 12C is opened, and the switching valve 11B is closed.

  As a result, the refrigerant discharged from the compressor 18 is heated from the switching valves 10A and 11A of the usage-side units 1B and 1C that are heated via the refrigerant discharge pipe 3 and the high-pressure gas pipe 7 to the usage-side heat exchangers 12B and 12C. And is condensed and liquefied by these use side heat exchangers 12B and 12C. Then, the refrigerant condensed and liquefied in the use side heat exchangers 12B and 12C is depressurized by the refrigerant flow control valve 14 of the use side unit 1A via the liquid pipe 38, and then evaporated by the use side heat exchanger 12A. The

  The microcomputer 22 fully opens the refrigerant flow control valves 15 and 16 and the refrigerant flow control valve 17, and adjusts the refrigerant flow control valve 14 based on the output of the temperature sensor 23A.

  The refrigerant that has passed through the use side heat exchanger 12A flows into the low-pressure gas pipe 8, and is sucked into the compressor 18 through the refrigerant suction pipe 4 and the gas-liquid separator 21 in order. Thus, in this case, the middle chamber and the right chamber are heated by the use side heat exchangers 12B and 12C acting as condensers, and the left chamber is cooled by the use side heat exchanger 12A acting as an evaporator. It becomes like this.

  As described above, since the heating by the use side units 1B and 1C is performed using the exhaust heat generated when the use side unit 1A is cooled, the heat recovery and use can be efficiently performed, and the operation is efficient. It can be performed.

  Here, the capacities of the respective use side heat exchangers 12A, 12B, 12C in the conventional example are the capacity of the use side heat exchanger 12A (ratio 3) = the capacity of the use side heat exchanger 12B (ratio 1) as described above. ) + Used side heat exchanger 12C capacity (ratio 2). Thereby, since the utilization side heat exchangers 12B and 12C can be heated using all the exhaust heat when the utilization side heat exchanger 12A acts as an evaporator, the heat source side heat exchanger 19 is used. This eliminates the need for waste heat treatment, and allows efficient operation by wasteless heat recovery.

  Therefore, in this case as well, the power consumption can be reduced and the running cost can be reduced as compared with the conventional vending machine that performs heating only by the electric heater.

  Here, in this type of heat pump that cools and heats using the heat of the outside air, the compressor 18 and the heat source side heat exchanger 19 are installed in the same air passage and heat is simultaneously exchanged by the heat radiating fan 24. It has been known. And when making the heat source side heat exchanger 19 act as a condenser, since the compressor 18 and the heat source side heat exchanger 19 can be air-cooled simultaneously, it is convenient.

JP 2001-84447 A

  However, since the heat source side heat exchanger 19 acts as an evaporator when the interior is heated, the ambient temperature around the compressor 18 is normally close to the outside air temperature, and thus heat is dissipated from the high-temperature compressor shell. Due to the action, the compressor is considerably cooler. During the heating operation, the heat dissipation action from the compressor reduces the amount of heat carried to the indoor side in order to reduce the temperature of the refrigerant gas discharged from the compressor, thereby lowering the temperature of the heat exchanger on the indoor side. , The amount of heat exchanged was reduced.

  In the above conventional configuration, cooling and heating operations are performed by switching the refrigerant flow path to one compressor and a heat exchanger provided inside and outside the warehouse, so that the compressor and the heat source side heat exchanger are simultaneously operated by a heat radiating fan. Since air cooling or heat exchange is performed, wind is applied to the compressor even during the heating operation, and the heating capacity is reduced by the amount of heat radiated from the compressor, thereby reducing the efficiency.

  The present invention solves the above-mentioned conventional problems, and constitutes two independent cooling cycles and cooling heating cycles in a narrow machine room of a vending machine, and includes a compressor as a cooling cycle, cooling heating Compressor for cooling or heating by arranging the compressor of the cycle efficiently and properly, and arranging the heat exchangers and evaporating dishes of other components in the machine room to increase the condensation capacity and evaporation capacity The purpose is to provide a vending machine that suppresses the heat dissipation from the air, maintains the amount of heat carried to the indoor side, maintains the temperature of the heat exchanger on the indoor side at an appropriate temperature, and increases the heating efficiency. And

  It is another object of the present invention to prevent quality deterioration such as deterioration in serviceability, deterioration in workability such as harness processing, piping contact, and wrong solenoid attachment due to an increase in the number of flow path switching valves for temperature switching. To do.

  In order to solve the above-described conventional problems, the vending machine according to the present invention includes a first compressor, a first heat exchanger, and a refrigerant connected to a cooling and heating device that cools and heats the inside of a machine room. A plurality of flow path switching valves for switching the flow path, a second compressor and a condenser connected to a refrigeration cycle for cooling the interior, and the first heat exchanger and the condenser in front of the machine chamber Are arranged adjacent to each other, the first compressor and the second compressor are arranged side by side behind the machine room, the plurality of flow path switching valves are arranged side by side in the machine room, and the plurality of flow path switching is performed. A solenoid part for operating the valve is integrally arranged.

  As a result, the space in the machine room can be used effectively, and the cooling chamber and the cooling and heating chamber can be cooled or heated by independent cooling and heating cycles, so that the internal temperature can be efficiently controlled. At the same time, the flow path switching valve can be replaced without taking out the unit at the time of service, and since the solenoid part is integrated, workability such as harness processing can be simplified, piping can be fixed easily, and workability can be improved. It is possible to suppress quality degradation due to pipe contact and solenoid attachment mistakes.

  The vending machine of the present invention can be a vending machine with improved heating efficiency and improved serviceability and quality of the cooling and heating system.

The front view of the vending machine of Embodiment 1 of this invention Vertical sectional view of the vending machine of the embodiment Plan view of the machine room of the vending machine of the embodiment Perspective view of main part of machine room of vending machine according to the embodiment Refrigerant circuit diagram of a conventional vending machine Configuration diagram of conventional vending machine controller

  The invention according to claim 1 is divided into a plurality of warehouses, and a product storage for cooling or warming the products put in the storage, and a partition formation in the vertical direction by the product storage and the partition walls. In the vending machine provided with the machine room, a flow path for the first compressor, the first heat exchanger, and the refrigerant connected to a cooling and heating device for cooling and heating the inside of the warehouse is provided in the machine room. A plurality of flow path switching valves for switching, a second compressor and a condenser connected to a refrigeration cycle for cooling the interior, and the first heat exchanger and the condenser are adjacent to each other in front of the machine room The first compressor and the second compressor are arranged side by side behind the machine room, the plurality of flow path switching valves are arranged side by side in the machine room, and the plurality of flow path switching valves are arranged. The solenoid part to be operated is arranged in one piece to save space in the machine room. The cooling chamber and the cooling chamber can be cooled or heated by independent cooling and heating cycles, so that the inside temperature can be optimized efficiently, and serviceability and quality are improved. can do.

  According to a second aspect of the present invention, in the first aspect of the present invention, the flow path switching valves are arranged centrally in front of the machine room, and the flow path switching valves are installed from the front without pulling out the unit during service. Serviceability can be improved because it can be exchanged.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the solenoid part for operating the plurality of flow path switching valves is integrally arranged on the bracket, and when the parts are integrated, the harness processing is performed. It is possible to simplify the workability of harness processing etc. in unit production by combining them, and the pipes connected to the flow path switching valve can be fixed together by fixing them together, so quality due to pipe contact and incorrect solenoid attachment Deterioration can be suppressed.

  A fourth aspect of the present invention is the invention according to any one of the first to third aspects, wherein a flammable refrigerant is applied as a refrigerant of the cooling and heating system, and the internal temperature is efficiently achieved. It is possible to reduce the power consumption.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a front view of a vending machine according to the first embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of the vending machine according to the first embodiment. FIG. 3 is a plan view of the machine room of the vending machine according to the embodiment. FIG. 4 is a perspective view of a main part of the machine room of the vending machine according to the embodiment.

In FIG. 1, the vending machine 30 is for cooling or heating the can beverage product,
The main body 31 is composed of a heat insulating box that opens to the front surface, and an openable and closable front door 32 that is pivotally supported by the main body 31 on one side. A sales opening 33 is arranged at the lower part of the front door 32.

  A product storage 34 having a heat insulating door (not shown) on the front is formed in the main body 31 behind the front door 32. As shown in FIG. 1, the product storage 34 is divided into left and right three chambers by partition walls 35 and 36 filled with a heat insulating material, and a cooling box 37 is formed on the left side of the partition wall 35. A cooling / heating chamber 38 is formed at the center located between the wall 35 and the partition wall 36 and can be switched by selecting either cooling or heating, and either cooling or heating is also provided on the right side of the partition wall 36. A cooling and heating chamber 39 that can be selected and switched is formed.

  In each room, a storage shelf 40 is suspended above the product storage 34, and a product 41 is stored inside. In the lower part of the storage shelf 40, a carry-out device 42 for carrying out the selected merchandise is arranged, and the merchandise 41 is dropped downward one by one. A chute 43 inclined toward the sales outlet 33 is disposed below the carry-out device 42, and the product 41 discharged from each storage shelf 40 falls on the chute 43 and rolls to sell the sales outlet 33. It will be led to.

  Below the chute 43, a cooling chamber 44 and cooling chambers 45 and 46 are provided corresponding to the cooling chamber 37 and the cooling and heating chambers 38 and 39, respectively. An evaporator 47 is provided in the cooling chamber 44, an evaporator 48 is provided in the cooling greenhouse 45, and an electric heater 49 that is energized when heated is used as a heating chamber. The cooling chamber 46 includes an indoor heat exchanger 50 and an auxiliary electric heater 64 that can be energized as an auxiliary to the indoor heat exchanger 50 during heating. Each room has an internal fan (not shown), forcibly ventilates the inside of the room forcibly, and the inside of the room is controlled to an appropriate temperature by an internal sensor (not shown) provided for each room. .

  A machine room 52 defined by a partition wall 51 provided at the lower part of the commodity storage 34 is formed below the main body 31.

  The machine room 52 includes a first compressor 53 connected in a ring with the indoor heat exchanger 50, a first heat exchanger 54, a flow switching valve 55 that switches a refrigerant flow path, and the like, The cooling cycle includes a second compressor 56 connected in a ring with the evaporators 47 and 48, a condenser 57, and a three-way valve 58 for switching the refrigerant flow path to the evaporators 47 and 48. The flow path switching valve 55 includes four switching valves, and includes a high pressure side cooling switching valve 55a and a low pressure side cooling switching valve 55b that are opened as a refrigerant flow path when the cooling and heating chamber 39 is cooled. When the cooling / heating chamber 39 is heated, the high-pressure side warming switching valve 55c and the low-pressure side warming switching valve 55d that are opened as the refrigerant flow path are provided.

  As shown in FIG. 3, the first heat exchanger 54 and the condenser 57 are fin tube type heat exchangers, and are integrated heat exchangers so-called cascades formed by overlapping common fin tubes and overlapping each other in the front-rear direction. A heat exchanger 59 is formed. As shown in the figure, a cascade heat exchanger 59 is disposed at a front position in the machine room 52, that is, on the front door 32 side of the vending machine 30, at a substantially central position in the left-right direction. A compressor 53 and a second compressor 56 are arranged side by side. The second compressor 56 is installed at a position almost directly behind the cascade heat exchanger 59. A space is formed in the lateral direction of the cascade heat exchanger 59 in front of the first compressor 53, and the flow path switching valve 55 is disposed side by side with respect to the side surface in this portion, A piping system, decompression means, and the like that connect the first heat exchanger 54 and the indoor heat exchanger 50 in an annular shape are integrated.

The evaporating dish 60 collects and collects defrost water generated in the cooling chamber 37 and the cooling and heating chambers 38 and 39.
Is arranged on the side of the cascade heat exchanger 59, and the evaporating dish 60, the flow path switching valve 55 and other piping systems are arranged on both sides of the machine room 52, and the cascade heat exchanger 59 is interposed between them. It is the composition to arrange. The evaporating dish 60 is formed from the front to the rear of the machine room 52 and is formed in a substantially rectangular shape. Specifically, it extends to the side of the second compressor 56 and is arranged. For this reason, when the flow path switching valve 55 is out of order, if the front door 32 is opened, the unit can be pulled forward without being pulled out, so that workability is improved.

  In addition, two fans 61 (the left fan 61a and the right fan 61b when the vending machine 30 is viewed from the front) are arranged close to the rear of the cascade heat exchanger 59 to force air from the front of the machine room 52. The air is taken into the machine room 52 through the cascade heat exchanger 59. A guide member 62 for guiding air is formed between the fan 61 and the first compressor 53 and the second compressor 56 so that the air from the fan 61 is directly guided to the evaporating dish 60. The fan 61 and the first compressor 53 and the second compressor 56 are formed so as to be partitioned.

  A three-way valve 58 is disposed behind the evaporating dish 60. The first compressor 53 and the second compressor 56 are respectively formed with a first sealed pipe and a second sealed pipe filled with natural refrigerant toward the front of the machine chamber 52, and each pipe has a first connection pipe 53b. And the second connection pipe 56b are connected and bent so as to be directed toward the rear of the machine room 52.

  For this reason, when carrying out the refrigerant disposal and recovery work of the vending machine 30 installed in the market, it is not necessary to remove the machine room 52 and work can be performed directly from the rear of the vending machine 30. Can work easily.

  Further, as shown in FIG. 4, a detachable solenoid 66 for driving the flow path switching valve 55 is disposed side by side on the solenoid bracket 67 at the upper part of the flow path switching valve 55. Here, when the solenoid 66 is installed, if one flow path switching valve 55a and the solenoid 66a are fixed, all the solenoids 66 and the flow path switching valve 55 are connected to the corresponding ones. For this reason, it is possible to prevent a mistake in attaching the solenoid 66 during work, and it is possible to easily perform harness processing and improve workability. Further, by completely fixing the solenoid bracket 67 on the unit base with screws or the like, the flow path switching valve 55 and the piping system connected thereto can be completely fixed, so that quality deterioration such as piping contact can be prevented.

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

  First, when the refrigerator 37 and the cooling and heating chambers 38 and 39 are all cooled as a refrigerator, that is, in the cooling and heating chamber 39, the high pressure side cooling switching valve 55a and the low pressure side cooling switching valve 55b are opened. The first heat exchanger 54 incorporated as the cascade heat exchanger 59 with the other switching valves 55c and 55d closed is functioning as a condenser, and the indoor heat exchanger 50 functions as an evaporator. It is formed.

  The two fans 61 (61a, 61b) provided in the machine room 52 are controlled by the outside air temperature and ON / OFF of the compressor. Specifically, when the outside air temperature is 25 ° C. or higher, when either the first compressor 53 or the second compressor 56 is driven, both the left and right fans 61a and 61b are driven, and both compressors are stopped. During the operation, only the right fan 61b is driven at a low speed. This is a natural refrigerant (for example, isobutane or propane) in which the refrigerant enclosed in the cooling and heating cycle side on the first compressor 53 side is flammable, and the refrigerant in the cooling cycle on the second compressor 56 side is the same. This is because the right fan 61b is driven so that the refrigerant does not stay in the machine room 52 even if the refrigerant leaks, so that the right fan 61b is prevented and the refrigerant is discharged out of the machine room 52.

  Further, when the second compressor 56 is driven, the fan 61 is driven at a high speed for both the left and right fans 61. That is, the left fan 61a and the right fan 61b can be individually switched between 24V and 17V according to the outside air temperature and the compressor ON / OFF, and are driven at a constant speed.

  When the outside air temperature is 10 to 25 ° C., the fan 61 is driven at a voltage of 17 V at a low speed. In this temperature range, it is not necessary to drive the fan 61 with a voltage of 24V, and the power consumption can be reduced by driving it at a low speed. When both compressors are OFF, as described above, only one fan is driven to forcibly discharge to prevent it from staying in the machine chamber 52 when the refrigerant leaks and becoming an ignition source. is doing.

  Further, only the right fan 61b of the two fans 61 is always driven at a voltage of 17V at a low speed regardless of the driving of the compressor at a low outside air temperature of 10 ° C. or lower. This is because the cooling capacity on the cooling and heating cycle side is excessive, and the liquid refrigerant stays in the first heat exchanger 54 serving as a condenser, the refrigerant circulation amount becomes insufficient, and the cooling chamber 39 cannot be cooled to an appropriate temperature. In order to reduce the heat exchange efficiency of the cascade heat exchanger 59, the cooling performance in the cabinet is maintained as control for driving only the right fan 61b at a low speed regardless of ON / OFF of the compressor.

  Then, the fan 61 is driven under the above conditions, and the air that is forcibly taken in from the front of the machine room 52 passes through the cascade heat exchanger 59 to remove the overheating of the refrigerant, and all the air discharged from the fan 61 is guided. It is guided toward the evaporating dish 60 by the member 62. Since the air guided to the evaporating dish 60 is formed so that the wall surface 60a extending rearward of the evaporating dish 60 becomes a part of the air path structure and guides the air to the rear of the machine chamber 52, that is, the second compressor 56. The second compressor 56 can be cooled. Thereby, the evaporation performance of the water in the evaporating dish 60 can be improved. In addition, all the air discharged from the fan 61 is directly guided to the evaporating dish 60. However, an opening 62a is formed in a part of the guide member 62 in a part located in front of the second compressor 56, and partly The air may be guided directly. As a result, it is possible to prevent the temperature of the second compressor 56 from excessively rising at a high outside air temperature and the protection device from working to stop driving.

  Basically, air is not led to the first compressor 52 and the second compressor 56 so as not to force convection by the fan 61 so that the heat radiation action of the compressor is not promoted. As mentioned above, this uses a flammable refrigerant and reduces the amount of refrigerant enclosed to such an extent that performance can be ensured. Therefore, the refrigerant circulates as the refrigerant melts into the oil in the compressor due to the heat dissipation action of the compressor. This is to prevent the amount of gas from being reduced.

  Next, when the internal setting is the cooling chamber 37, the cooling and heating chamber 38 is switched to the heating chamber 38, and the cooling and heating chamber 39 is switched to the cooling chamber 39, that is, the heating chamber 38 is switched to the evaporator 48 by the three-way valve 58. Also, when the electric heater 49 is energized and set so that the refrigerant does not circulate, the fan 61 is controlled in the same manner as the above setting.

  Also in this case, since the condensation capacity of the refrigerator 39 is excessive due to low outside air of 10 ° C. or less and the inside of the refrigerator does not cool, only the right fan 61b is reduced in order to reduce the heat exchange efficiency of the first heat exchanger 53. Driven by rotation, the cooling performance of the refrigerator 39 is maintained.

  Next, the cooling and heating system control and the control of the auxiliary electric heater 64 provided in the vicinity of the indoor heat exchanger 50 of the heating chamber 39 will be described for each outside air temperature when the cooling and heating chamber 39 is set to the heating chamber 39. To do.

When the outside air temperature is 25 ° C. or higher, the operation of the cooling and heating cycle is stopped, and the product in the heating chamber 39 is heated to an appropriate temperature only by the auxiliary electric heater 64. When the outside air temperature is 25 ° C. or higher, the evaporation pressure of the first heat exchanger 54 acting as an evaporator increases, and the suction pressure of the first compressor 53 tends to increase. For this reason, the operation of the first compressor 53 is stopped to ensure the reliability of the compressor.

  Further, in order to ensure the cooling performance of the refrigerators 37 and 38, the left and right fans 61a and 61b are rotated at a high speed by applying a voltage of 24V. As a result, the heat exchange efficiency of the condenser 57 is increased to ensure the cooling performance.

  When the outside air temperature is 10 to 25 ° C., the first compressor 53 is driven, the high pressure side warming switching valve 55c and the low pressure side warming switching valve 55d are opened, and the other switching valves 55a and 55b are closed. The first heat exchanger 54 integrated as a heat exchanger 59 acts as an evaporator and the indoor heat exchanger 50 acts as a condenser to heat the product. At this time, the auxiliary electric heater 64 is stopped and the inside is heated by only the cooling and heating system.

  Further, the first heat exchanger 54 drives both the left and right fans 61a and 61b in order to improve the improvement of exhaust heat recovery of the condenser 57. At this time, the fan 61 is rotated at a low voltage to drive it efficiently. In addition, since the auxiliary electric heater 64 is not energized during this temperature range, the power consumption can be greatly reduced.

  When the outside air temperature is a low outside air temperature of 10 ° C. or less, the inside of the cabinet is heated by the heating by the cooling heating system and the auxiliary electric heater 64 being energized. In particular, when a product is newly introduced from outside, the product temperature is almost the same as the outside air temperature, so it is necessary to heat it quickly. For this reason, the auxiliary | assistant electric heater 64 is supplied with electricity, and the warming performance in the initial stage is improved.

  Moreover, since the first compressor 53 is an inverter compressor, when the product is put in, the first compressor 53 is driven at high speed and the auxiliary electric heater 64 is continuously energized. Increase sales opportunities. The electric heater 64 is turned off while the product is warmed to an appropriate temperature and the sales standby state is turned off, and the first compressor 53 is driven at a low speed to reduce the power consumption while maintaining the warmed state efficiently. it can.

  Even in this outside air temperature range, the fan 61 is driven at a low speed to increase the efficiency of the cascade heat exchanger 59. In other words, the fan 61 always rotates either one of the fans and switches the input voltage value according to the outside air temperature. Therefore, the first action and effect is to prevent stagnation due to the leakage of the flammable refrigerant. As the effect of 2, the ability of the cascade heat exchanger can be operated to maintain the cooling or heating performance of the cooling / heating chamber 39 of the cooling / heating system.

  Then, the fan 61 is driven under the above conditions, and the air forcibly taken in from the front of the machine room 52 passes through the cascade heat exchanger 59 to remove the overheating of the refrigerant, and all the air discharged from the fan 61 is guided. It is guided toward the evaporating dish 60 by the member 62. Since the air guided to the evaporating dish 60 is formed so that the wall surface 60a extending rearward of the evaporating dish 60 becomes a part of the air path structure and guides the air to the rear of the machine chamber 52, that is, the second compressor 56. The second compressor 56 can be cooled. Thereby, the evaporation performance of the water in the evaporating dish 60 can be improved.

  In addition, all the air discharged from the fan 61 is directly guided to the evaporating dish 60. However, an opening 62a is formed in a part of the guide member 62 in a part located in front of the second compressor 56, and partly The air may be guided directly. As a result, it is possible to prevent the temperature of the second compressor 56 from excessively rising at a high outside air temperature and the protection device from working to stop driving.

  Basically, air is not led to the first compressor 52 and the second compressor 56 so as not to force convection by the fan 61 so that the heat radiation action of the compressor is not promoted. As mentioned above, this uses a flammable refrigerant and reduces the amount of refrigerant enclosed to such an extent that performance can be ensured. Therefore, the refrigerant circulates as the refrigerant melts into the oil in the compressor due to the heat dissipation action of the compressor. This is to prevent the amount of gas from being reduced.

  In particular, the upper surface and the side surface of the first compressor 53 are used to reduce the heat action of the first compressor 53 as much as possible, maintain the amount of heat carried to the inside of the warehouse, and maintain the temperature of the indoor heat exchanger 50 inside the warehouse at an appropriate temperature. If all are surrounded by a resin case 65 to reduce the direction heat action due to air convection, the heating efficiency can be further increased. Further, by enclosing with the case 65, the amount of the refrigerant in the compressor dissolved in the oil can be reduced, the amount of refrigerant circulating can be increased, and the number of refrigerant can be further reduced to prevent flammability. I can do it.

  Further, the first compressor 53 and the second compressor 56 are arranged side by side behind the machine room, and a plurality of flow path switching valves 55 are arranged side by side in the machine chamber 52 to operate the plurality of flow path switching valves 55. The solenoid 66 is integrally arranged, the space in the machine room can be used effectively, and the cooling chamber and the cooling and heating chamber are cooled or heated by independent cooling and heating cycles, so that the warehouse is efficiently stored. It is possible to improve the internal temperature and improve serviceability and quality.

  Further, the flow path switching valve 55 is centrally arranged in front of the machine room 52, and the service performance can be improved because the flow path switching valve 55 can be replaced from the front without pulling out the unit at the time of service.

  Further, the solenoid 66 for operating the plurality of flow path switching valves 55 is integrally arranged on the bracket 67, and when integrated, the harness processing can be integrated to simplify workability such as harness processing in unit production. Moreover, since the pipes connected to the flow path switching valve can be fixed together by fixing them integrally, it is possible to suppress deterioration in quality due to pipe contact and solenoid attachment errors.

  Further, a flammable refrigerant is applied as a refrigerant of the cooling and heating system, and it is possible to efficiently achieve an appropriate temperature inside the cabinet and further reduce power consumption.

  Therefore, by arranging the components of the cooling / heating cycle and the components of the cooling cycle in the machine room as described above, the heating efficiency of the cooling / heating cycle can be increased, and at the same time, the cooling efficiency of the cooling cycle can be increased.

  As described above, the vending machine according to the present invention improves the heating efficiency of the cooling and heating system, reduces the amount of flammable refrigerant, and is excellent in serviceability and workability. Applicable.

DESCRIPTION OF SYMBOLS 30 Vending machine 37 Cooling box 38, 39 Cooling warming box 47, 48 Evaporator 50 Indoor heat exchanger 52 Machine room 53 1st compressor 54 1st heat exchanger 55 Flow path switching valve 56 2nd compressor 57 Condensation 59 Cascade heat exchanger 66 Solenoid 67 Solenoid bracket

Claims (4)

A vending machine comprising a product storage compartment that is partitioned into a plurality of compartments and cools or heats the product that has been put into the compartment, and a machine room that is partitioned vertically by the product storage compartment and partition walls In the machine, in the machine room, a plurality of flow path switching valves for switching the flow path of the first compressor, the first heat exchanger, and the refrigerant connected to a cooling and heating device that cools and heats the interior of the warehouse, A second compressor and a condenser connected to a refrigeration cycle for cooling the inside of the refrigerator; the first heat exchanger and the condenser are disposed adjacent to each other in front of the machine room; and The first compressor and the second compressor are arranged side by side, the plurality of flow path switching valves are arranged side by side in the machine room, and a solenoid unit that operates the plurality of flow path switching valves is integrally disposed. Vending machine characterized by that. The vending machine according to claim 1, wherein the flow path switching valves are collectively arranged in front of the machine room. The vending machine according to claim 1 or 2, wherein a solenoid unit for operating a plurality of flow path switching valves is integrally disposed on the bracket. The vending machine according to any one of claims 1 to 3, wherein a flammable refrigerant is applied as a refrigerant of the cooling and heating system.