JP5407692B2 - vending machine - Google Patents

Description

  The present invention relates to a vending machine that sells a product such as a beverage in a container such as a can, a bottle, a pack, or a plastic bottle after being cooled or heated in a refrigerant circuit.

  Reducing carbon dioxide emissions has become a challenge with recent global warming, and energy-saving vending machines have been developed. As one of the methods, a heat pump type vending machine that uses the heat of the condenser, which has been exhausted in the past, to heat the inside of the cabinet has attracted attention (for example, see Patent Document 1).

  The vending machine disclosed in Patent Document 1 has a heat exchanger for cooling and heating in a storage that also serves as cooling and heating, and expansion that expands the refrigerant for each evaporator in each storage Since the vessel was provided, there was a problem that the cost increased.

  Therefore, in order to reduce the cost, the inventors provided one internal heat exchanger for both cooling and heating in the storage that also serves as one cooling and heating as shown in FIG. We have developed a vending machine that reduces costs by providing only two units for cooling and heating and not for each evaporator.

  This refrigerant circuit shown in FIG. 7 has a cooling circuit 60A that only cools the inside of the cabinet and a heating / cooling circuit 60B that simultaneously performs cooling and heating inside the cabinet (performs a heat pump operation). In addition, the enclosure of the dotted line in a figure has shown typically the goods storage 40a only for cooling, and the goods storage 40b, 40c used also for cooling and heating.

  The cooling circuit 60A is connected to the flow divider 64 via the compressor 61, the condenser solenoid valve 68, the condenser 62, and the first expander 63, one of the flow dividers 64 being the first cooler inlet. The electromagnetic valve 70a and the evaporator 65a are connected to the collector 67. The other of the flow divider 64 is the second cooler inlet electromagnetic valves 70b and 70c, the check valves 71b and 71c, the internal heat exchanger 65b, The circuit is connected to the collector 67 via 65 c and returns from the collector 67 to the compressor 61 via the accumulator 69.

  On the other hand, in addition to the cooling circulation circuit 60A, the heating / cooling circulation circuit 60B is connected in parallel to the condenser electromagnetic valve 68 from the compressor 61 and is connected to the check valves 71b and 71c via the heater electromagnetic valves 68b and 68c. After connecting to intermediate points (connection points) 168b and 168c with the inner heat exchangers 65b and 65c, respectively, and connecting from the outlet side of the inner heat exchangers 65b and 65c via check valves 71 and 71, respectively. A distribution path connected to the distributor 64 via the auxiliary heat exchanger 76 and the second expander 79 is provided.

  That is, the heating / cooling circulation circuit 60B is connected from the compressor 61 to the internal heat exchangers 65c, 65b via the heater electromagnetic valves 68b, 68c, and the check valves 71, 71 are connected to the internal heat exchangers 65c, 65b. To the distributor 64 via the auxiliary heat exchanger 76 and the expander 79, and to the evaporator 65 a via the first cooler inlet solenoid valve 70 a from the flow divider 64, the collector 67, and the accumulator 69 is a circuit that returns to the compressor 61 via 69.

  As the second cooler inlet electromagnetic valves 70b and 70c, a normal low-cost direct acting electromagnetic valve 80 as shown in FIG. 8 is used. As shown in the figure, the direct acting solenoid valve 80 has a cylindrical body inside 81a in the solenoid valve body 81, a first connecting pipe portion 81b on the side surface side of the body inside 81a, and a second side on the bottom surface side. The connecting pipe portion 81c is connected, and a valve seat 81d is formed in a truncated cone shape on the peripheral edge of the upper surface of the second connecting pipe portion 81c. A spherical valve body 82 that comes into contact with the valve seat 81d and a spool 83 that is attached to the valve body 82 and biases the valve body 82 with gravity and a spring 84 are inserted into the main body inside 81a. An iron armature 85 is connected to the spool 83, and a solenoid 86 is provided on the upper peripheral side of the armature 85.

  When the solenoid 86 is in a non-energized state, the valve body 82 is brought into contact with the valve seat 81d by the gravity of the spring 84 and the spool 83 as shown in FIG. The communication of the second connecting pipe portion 81c is sealed. Specifically, the first connecting pipe portion 81 b and the main body inside 81 a communicate with each other, and the second connecting pipe portion 81 c is closed with the main body inside 81 a by the valve body 82. When the solenoid 86 is energized, the armature 85 is attracted and moved upward by the magnetic force of the solenoid 86 as shown in FIG. 8B, so that a gap is formed between the valve element 82 and the valve seat 81d. The first connecting pipe portion 81b and the second connecting pipe portion 81c communicate with each other, and the refrigerant can pass therethrough.

  With such a configuration, when the product storage case 40a is cooled and the product storage cases 40b and 40c are set to the heating mode, the control means of the vending machine includes the heater solenoid valves 68b and 68c, the first cooler inlet solenoid valve, and the like. 70a is opened, and the condenser solenoid valve 68, the second cooler inlet solenoid valves 70b and 70c, and the cooler outlet solenoid valves 72b and 72c are closed. At this time, the high-temperature refrigerant compressed by the compressor 61 flows into the in-compartment heat exchangers 65b and 65c via the heater electromagnetic valves 68b and 68c and the connection points 168b and 168c as shown by the thick lines in FIG. The refrigerant flowing into the internal heat exchangers 65b and 65c condenses, heats the product storages 40b and 40c, collects through the check valves 71 and 71, and further condenses in the auxiliary heat exchanger 76 to the second. Flows into the inflator 79. The refrigerant flowing into the second expander 79 expands into a low-temperature and low-pressure gas-liquid two-phase flow, and flows into the evaporator 65a via the flow divider 64 and the first cooler inlet electromagnetic valve 70a. The refrigerant that has flowed into the evaporator 65 a evaporates and cools the commodity storage 40 a, and returns to the compressor 61 via the collector 67 and the accumulator 69. In this heat pump operation, the interior temperature from the interior temperature sensors Ta, Tb, Tc is detected, and the interior is maintained at an appropriate temperature by the thermocycle operation.

JP 2005-227833 A

  However, since this type of vending machine uses check valves 71b and 71c, the cost increases accordingly. However, if the check valves 71b and 71c are not provided, the pressure at the connection points 168b and 168c is high, so the second connection pipe portion 81c of the second cooler inlet electromagnetic valves 70b and 70c connected to the connection points 168b and 168c. , 81c (see FIG. 8), the valve bodies 82 and 82 closed from the valve seats 81d and 81d are pressurized in a direction to separate the valve seats 81d and 81d. Since the refrigerant leaks and flows from the flow divider 64 into the evaporator 65a via the first cooling inlet electromagnetic valve 70a, insufficient heating of the product storage boxes 40b and 40c is caused. In order to prevent this, it is necessary to increase the size of the solenoid valve so as to increase the sealing force of the second cooler inlet solenoid valves 70b and 70c, or to use a pilot type solenoid valve. As a result, the cost increases.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to solve the above-described problems and to provide a vending machine with low cost and low power consumption.

In order to achieve the above object, a vending machine according to claim 1 of the present invention has at least one product storage dedicated to cooling and a product storage combined with cooling and heating, and is selected according to an operation mode of cooling and heating. A vending machine that cools or heats the product storage,
A compressor that compresses the refrigerant, a condenser that condenses the refrigerant, a first expansion means that expands the refrigerant, a distributor that distributes the expanded refrigerant, and one of the distributors is the first cooler inlet electromagnetic An evaporator provided in a product storage dedicated to cooling that evaporates the refrigerant through a valve, and a product storage for cooling and heating that evaporates the refrigerant through the second cooler inlet electromagnetic valve on the other side of the distributor. A cooling circulation circuit is configured by the internal heat exchanger provided in the storage, and a merger that combines the refrigerant flowing from the internal heat exchanger via the cooler outlet solenoid valve and the refrigerant flowing from the evaporator And
Connected to the cooling circuit from the compressor between the inlet side of the internal heat exchanger and the second electromagnetic inlet solenoid valve through a heater electromagnetic valve, and the internal heat An automatic heating / cooling circuit configured to perform a heat pump operation by causing the internal heat exchanger to act as a condenser by connecting a pipe between the outlet side of the exchanger and the distributor via a second expansion means. In the vending machine,
The second cooler inlet solenoid valve is constituted by a direct acting solenoid valve, and is sealed with a first connecting pipe portion opened inside the solenoid valve body when no power is supplied, and a valve inside the solenoid valve body. And the second connecting pipe portion is connected to the inlet side of the internal heat exchanger, and the second connecting pipe portion is connected to the outlet side of the flow divider. It is connected.

  The vending machine according to claim 1 of the present invention is characterized in that the second cooler inlet solenoid valve is constituted by a direct acting solenoid valve, and is opened to the inside of the solenoid valve body when not energized, A second connecting pipe part sealed with a valve inside the solenoid valve body, and the first connecting pipe part is connected to the inlet side of the internal heat exchanger, and the second connecting pipe By connecting the outlet to the outlet side of the flow divider, the check valve between the second cooler inlet solenoid valve and the internal heat exchanger can be omitted, providing a low-cost and low power consumption vending machine Can do.

1 is a perspective view showing a vending machine according to an embodiment of the present invention. Sectional drawing of the vending machine shown in FIG. The refrigerant circuit figure which concerns on the Example of this invention. The block diagram of a control apparatus. The circuit diagram which shows the flow of the refrigerant | coolant in the cooling single operation which cools all three chambers. The circuit diagram which shows the flow of the refrigerant | coolant in the heat pump driving | operation which cools 1 chamber and heats 2 chambers. The refrigerant circuit figure concerning a prior art example. It is sectional drawing which shows the structure of a direct acting type solenoid valve, (a) is sectional drawing at the time of no energization of a solenoid, (b) is sectional drawing at the time of energization of a solenoid.

Exemplary embodiments of a vending machine according to the present invention will be described below in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.
In the perspective view of FIG. 1, the cross-sectional view of FIG. 2, and the refrigerant circuit diagram of FIG. 3, the vending machine includes a main body cabinet 10 formed as a rectangular heat insulator having an open front surface, and an exterior provided on the front surface thereof. The door 20 and the inner door 30 and the inside of the main body cabinet 10 are partitioned and formed by the bottom plate 11 in two upper and lower stages, and the upper part is partitioned by, for example, two heat-insulating partition plates 40w, three independent product storage boxes 40a and 40b, 40 c, a machine room 50 for storing the cooling / heating unit 60 for cooling or heating the product storage units 40 a, 40 b, and 40 c at the lower part, and the inside of the outer door 20, And a control means 90 for controlling the cooling and heating operation of the vending machine by the temperature sensors Ta, Tb and Tc.

  More specifically, the outer door 20 is used to open and close the front opening of the main body cabinet 10 and is not shown in the figure. Product display room, selection button for selecting the product to be sold, money slot for inserting money, product outlet 21 for taking out the paid-out product, etc. Is arranged.

  The inner door 30 opens and closes the front surfaces of the product storage units 40a, 40b, and 40c to keep the products in the interior warm. The inner door 30 is a box-shaped structure that is divided into upper and lower stages and has a heat insulator inside. The upper inner door 30a is pivotally supported by the outer door 20 at one end and engaged with the outer door 20 at the other end, and the upper inner door 30a is opened simultaneously with the opening of the outer door 20 to replenish the goods. To make it easier. The lower inner door 30b is in a closed state when one end is pivotally supported on the main body cabinet 10 and the other end is hooked on the main body cabinet 10 with a latch (not shown) and the outer door 20 is opened. This prevents the cooled or heated air in the product storage boxes 40a, 40b, and 40c from flowing out, and can be opened as needed during maintenance.

  The product storage units 40a, 40b, and 40c are for storing products such as canned beverages and beverages containing plastic bottles at a desired temperature, and the capacity of the storage units is the product storage units 40a, 40c. , 40b in a large manner. In this embodiment, the product storage 40a is exclusively used for cooling, and the product storages 40b and 40c are also used for cooling and heating. The product storage racks 40a, 40b, and 40c store the products in a manner that they are arranged in the vertical direction, and are provided with a product storage rack R that includes a product delivery mechanism for discharging the products one by one in response to a sales signal. There is a product carry-out chute 42 for carrying the discharged product S to the sales port 21 of the outer door through a carry-out door 31 installed in the inner door 30b.

  The cooling / heating unit 60 includes a compressor 61, a condenser 62, an expander (expansion means) 63, a second expander 79, an accumulator 69, and an auxiliary heat exchanger 76 in the machine room 50. It has the evaporator 65a and the internal heat exchangers 65b and 65c in the store, and each device is connected by refrigerant piping. The cooling / heating unit 60 cools or heats the product S in the product storage rack R by circulating cold air or warm air in the cabinet according to the cooling / heating operation mode.

  The compressor 61 for cooling and heating is for compressing the refrigerant and circulating it in the circuit. During the cooling operation, the evaporation temperature is about −10 ° C., the condensation temperature is about 40 ° C., and during the heating operation, An evaporation temperature of about −10 ° C. and a condensation temperature of about 70 ° C. are used.

  The condenser 62 is a fin tube type heat exchanger, and discharges unnecessary condensation heat during the cooling operation. A fan 62f is installed at the rear of the condenser 62. The fan 62f sucks air from the front opening of the machine chamber 50, sucks heat of condensation by the condenser 62, and absorbs exhaust heat of the compressor 61. Thus, the air is exhausted to the rear opening of the machine room 50.

The first expander 63 decompresses the refrigerant passing during the cooling operation and adiabatically expands, and is, for example, a capillary, a temperature expansion valve, or an electronic expansion valve.
The flow divider 64 is for distributing the refrigerant adiabatically expanded by the expander 63 to the evaporator 65a and the internal heat exchangers 65b and 65c.

  The evaporator 65a is for cooling the product storage 40a, and the internal heat exchangers 65b and 65c are for cooling or heating the product storage 40b and 40c. Further, the evaporator 65a and the internal heat exchangers 65b and 65c are installed at the lower part of each product storage, surrounded by a wind tunnel 67, a fan 65f is installed behind them, and a duct 67d is installed behind them. It has been installed. As for cooling and heating in the product storage, the air cooled or heated by the evaporator 65a and the internal heat exchangers 65b and 65c is blown to the product S in the product storage, as shown by the arrows in FIG. It is performed by circulating and collecting from the duct 67d.

  The accumulator 69 is a sealed container for allowing the refrigerant evaporated from the evaporator 65a and the internal heat exchangers 65b and 65c to flow in, separating the gas and liquid, storing the liquid refrigerant, and returning the gaseous refrigerant to the compressor 61. is there. The accumulator 69 is also a container for storing the refrigerant remaining in the refrigerant circulation of the circuit.

The auxiliary heat exchanger 76 is a fin tube type heat exchanger, and discharges unnecessary condensation heat during heating operation.
The second expander 79 decompresses the refrigerant passing during the heating operation and adiabatically expands, and is, for example, a capillary, a temperature expansion valve, or an electronic expansion valve.

The heaters 66b and 66c are installed in front of the internal heat exchangers 65b and 65c, and assist heating of the product storages 40b and 40c.
The inside temperature sensors Ta, Tb, Tc are installed on the upper surface of the wind tunnel 67 in the product storage 40a, 40b, 40c, and are used to detect the inside temperature of the product storage 40a, 40b, 40c. is there.

  The condenser solenoid valve 68 opens and closes the refrigerant passage between the compressor 61 and the condenser 62, and the heater solenoid valves 68b and 68c are compressed between the compressor 61 and the internal heat exchangers 65b and 65c. It opens and closes the refrigerant passage. The first cooler inlet solenoid valve 70a and the second cooler inlet solenoid valves 70b and 70c open and close the expanded refrigerant passage between the flow divider 64 and the evaporator 65a and the internal heat exchangers 65b and 65c. The cooler outlet solenoid valves 72b and 72c open and close the passage of the evaporated refrigerant between the internal heat exchangers 65b and 65c and the compressor 61. All of these solenoid valves have the structure of a direct acting solenoid valve as shown in FIG.

  The refrigerant circuit configuration of the cooling / heating unit 60 will be described in detail with reference to FIG. The refrigerant circuit includes a cooling circulation circuit 60A that only cools the inside of the warehouse and a heating and cooling circulation circuit 60B that simultaneously performs cooling and heating inside the warehouse (performs a heat pump operation). In addition, the enclosure of the dotted line in a figure has shown typically the goods storage 40a only for cooling, and the goods storage 40b, 40c used also for cooling and heating.

  The cooling circuit 60A is connected to the flow divider 64 via the compressor 61, the condenser solenoid valve 68, the condenser 62, and the first expander 63, one of the flow dividers 64 being the first cooler inlet. The electromagnetic valve 70a is connected to the collector 67 via the evaporator 65a, and the other of the flow divider 64 is connected to the collector via the second cooler inlet electromagnetic valves 70b and 70c and the internal heat exchangers 65b and 65c. 67 is a circuit that returns to the compressor 61 from the collector 67 via the accumulator 69.

  On the other hand, in addition to the cooling circuit 60A, the heating / cooling circuit 60B is connected in parallel with the condenser solenoid valve 68 from the compressor 61 and is connected to the condenser solenoid valve 68 via the heater solenoid valves 68b and 68c. 70b and 70c are connected to intermediate points (connection points) 168b and 168c between the interior heat exchangers 65b and 65c, respectively, and check valves 71 and 71 are respectively connected from the exit sides of the interior heat exchangers 65b and 65c. And a distribution path connected to the distributor 64 via the auxiliary heat exchanger 76 and the second expander 79.

  Note that the first connection pipe portions 81b and 81b (see FIG. 8) of the second cooler inlet solenoid valves 70b and 70c are connected to the connection points 168b and 168c, and the second connection pipe portions 81c and 81c (FIG. 8). Is connected to the shunt 64 side.

  Thus, the heating / cooling circulation circuit 60B is connected from the compressor 61 to the internal heat exchangers 65c, 65b via the heater electromagnetic valves 68b, 68c, and from the internal heat exchangers 65c, 65b to the check valves 71, 71. Are connected to the distributor 64 via the auxiliary heat exchanger 76 and the expander 79, and connected to the evaporator 65a via the first cooler inlet solenoid valve 70a from the shunt 64, This circuit returns to the compressor 61 via the accumulator 69.

  The control means 90 controls the cooling or heating of the product storage boxes 40a, 40b, and 40c by the cooling and heating operation mode. As shown in FIG. 4, a CPU and a memory are provided inside, and control such as opening and closing of the solenoid valve of the refrigerant circuit is performed according to the cooling heating operation mode determined by the setting of the operation mode setting SW91. The operation mode indicates the cooling or heating operation of the product storage units 40a, 40b, and 40c by C and H, and in the order of (40a, 40b, 40c) from the left side of the product storage unit, for example, all are cooling Is described as CCC mode, and when only the right product storage is heated, it is described as CCH mode. Further, the control means 90 includes a compressor 61, a condenser solenoid valve 68, a first cooler inlet solenoid valve 70a, and a second cooler inlet solenoid valve according to the temperatures detected by the internal temperature sensors Ta, Tb, Tc. 70b, 70c, cooler outlet solenoid valves 72b, 72c, heater solenoid valves 68b, 68c, etc. are controlled, and the interior temperature is maintained at an appropriate temperature by thermocycle operation in which the interior is controlled to be ON / OFF within a certain temperature range. .

  When the operation mode is set to the CCC mode by operating the operation mode setting SW 91 in such a configuration, the control unit 90 causes the condenser solenoid valve 68, the first cooler inlet solenoid valve 70a, and the second cooler inlet solenoid valves 70b, 70c. The cooler outlet solenoid valves 72b and 72c are opened, and the heater solenoid valves 68b and 68c are closed. As shown by the thick line in FIG. 5, the high-temperature refrigerant compressed by the compressor 61 is condensed by the condenser 62 to become a liquid, expands by the expander 63, and becomes a low-temperature gas-liquid two-phase flow. And then flows into the evaporator 65a and the internal heat exchangers 65b and 65c. The refrigerant that flows in evaporates in the evaporator 65a and the internal heat exchangers 65b and 65c, cools the product storages 40a, 40b, and 40c, and the evaporated refrigerant collects in the collector 67 to store the liquid refrigerant. Gas-liquid separation is performed via 69 and the flow returns to the compressor 61. In this cooling, the controller 90 controls the internal temperature to an appropriate temperature by the thermocycle operation by the internal temperature sensors Ta, Tb, and Tc.

  Next, when the operation mode is set to the CHH mode in which the operation mode setting SW91 is operated to cool the left product storage case 40a and the middle and right product storage items 40b and 40c are heated, The valves 68b and 68c and the first cooler inlet solenoid valve 70a are opened, and the condenser solenoid valve 68, the second cooler inlet solenoid valves 70b and 70c, and the cooler outlet solenoid valves 72b and 72c are closed. At this time, the high-temperature refrigerant compressed by the compressor 61 flows into the in-compartment heat exchangers 65b and 65c through the heater electromagnetic valves 68b and 68c and the connection points 168b and 168c as shown by the thick lines in FIG. The refrigerant flowing into the internal heat exchangers 65b and 65c condenses, heats the product storages 40b and 40c, collects through the check valves 71 and 71, and further condenses in the auxiliary heat exchanger 76 to the second. Flows into the inflator 79. The refrigerant flowing into the second expander 79 expands into a low-temperature and low-pressure gas-liquid two-phase flow, and flows into the evaporator 65a via the flow divider 64 and the first cooler inlet electromagnetic valve 70a. The refrigerant that has flowed into the evaporator 65 a evaporates and cools the commodity storage 40 a, and returns to the compressor 61 via the collector 67 and the accumulator 69. In this heat pump operation, the inside of the cabinet is maintained at an appropriate temperature by the thermocycle operation as described above.

  During the heat pump operation, the pressure at the connection points 168b and 168c is high. However, since the connection points 168b and 168c are connected to the first connection pipe part 81b (see FIG. 8) opened to the main body interior 81a (see FIG. 8) of the second electromagnetic valves 70b and 70c, respectively. When the internal pressure 81a becomes high, the valve body 82 is brought into contact with the valve seat 81d and the refrigerant passage is closed. As a result, leakage of refrigerant from the flow divider 64 to the evaporator 65a is suppressed. Accordingly, since a predetermined heating capacity is secured in the product storage 40b, 40c, the check valve between the second cooler inlet electromagnetic valves 70b, 70c and the internal heat exchangers 65b, 65c is omitted. Even a low-cost refrigerant circuit can be operated with less power consumption by heat pump operation.

  In the above description, the cooling and heating operation mode is described as the CHH mode. However, the same effect can be obtained in the CCH mode and the CHC mode in which heating is performed in a single product storage. In the above description, the vending machine dedicated to cooling and heating is used for the two-chamber product storage, but the same effect can be obtained by using a vending machine dedicated to cooling and heating the single-product storage. It is done.

  As described above, the vending machine according to the present invention is suitable for cooling or heating a product such as a beverage contained in a container such as a can, a bottle, a pack, or a plastic bottle in a refrigerant circuit.

DESCRIPTION OF SYMBOLS 10 Main body cabinet 20 Outer door 30 Inner door 40a, 40b, 40c Product storage 60 Cooling / heating unit 61 Compressor 62 Condenser 63 First expander 64 Shunt 65a Evaporator 65b, 65c Inner heat exchanger 68 Condensation Solenoid valve 68a, 68b Heater solenoid valve 70a First cooler inlet solenoid valve 70b, 70c Second cooler inlet solenoid valve 72b, 72c Cooler exit solenoid valve 79 Second expander 80 Direct acting solenoid valve 81a Inside of the main body 81b First connection pipe part 81c Second connection pipe part 82 Valve body 83 Spool 84 Spring 90 Control device 91 Operation mode selection SW
168b, 168c connection point

Claims (1)

A vending machine having at least one product storage dedicated to cooling and a product storage combined with cooling and heating, and selectively cooling or heating the product storage according to an operation mode of cooling and heating,
A compressor that compresses the refrigerant, a condenser that condenses the refrigerant, a first expansion means that expands the refrigerant, a distributor that distributes the expanded refrigerant, and one of the distributors is the first cooler inlet electromagnetic An evaporator provided in a product storage dedicated to cooling that evaporates the refrigerant through a valve, and a product storage for cooling and heating that evaporates the refrigerant through the second cooler inlet electromagnetic valve on the other side of the distributor. A cooling circulation circuit is configured by the internal heat exchanger provided in the storage, and a merger that combines the refrigerant flowing from the internal heat exchanger via the cooler outlet solenoid valve and the refrigerant flowing from the evaporator And
Connected to the cooling circuit from the compressor between the inlet side of the internal heat exchanger and the second electromagnetic inlet solenoid valve through a heater electromagnetic valve, and the internal heat An automatic heating / cooling circuit configured to perform a heat pump operation by causing the internal heat exchanger to act as a condenser by connecting a pipe between the outlet side of the exchanger and the distributor via a second expansion means. In the vending machine,
The second cooler inlet solenoid valve is constituted by a linear solenoid valve, at the time of non-energized sealed a first connecting pipe section for opening within the solenoid valve body, in the solenoid valve body inside the valve And the first connecting pipe part is connected to the inlet side of the internal heat exchanger, and the second connecting pipe part is the outlet side of the flow divider Vending machine characterized by being connected to.