JP5481824B2 - vending machine - Google Patents

Description

  The present invention relates to a vending machine that sells products such as can drinks by cooling or heating them using a heat pump system.

  Conventionally, a vending machine of this type has been proposed with a heat pump for the purpose of energy saving (see Patent Document 1).

  FIG. 4 is a refrigerant circuit diagram of a conventional vending machine described in Patent Document 1. As shown in FIG. 4, the interior of the vending machine is divided into three parts, a dedicated cooling compartment (hereinafter referred to as a left chamber), a cooling / heating chamber B (hereinafter referred to as a middle chamber), and a cooling / heating chamber C (hereinafter referred to as a right chamber). A use side unit 1A (specific use side unit), a use side unit 1B, and a use side unit 1C, which will be described in detail later, are provided corresponding to each of the chambers), 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. 5 shows a configuration diagram of the control device of the conventional vending machine described in Patent Document 1. As shown in FIG. 5, the control device C is configured by a general-purpose microcomputer 22. On the input side, a product selection button and temperature sensors 23A, 23B, and 23C as temperature detecting means attached to the left chamber, the middle chamber, and the right chamber 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 by 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. Is sufficiently dissipated in 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.

  Thus, in the use side unit 1C, the right ventricle can be heated using waste heat generated during cooling of the use side units 1A and 1B, 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 by using the waste 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 use side heat exchangers 12B and 12C can be heated using all the waste heat when the use 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 heat recovery without waste.

  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.

  However, when the outside air temperature is low and the heat source side heat exchanger 19 is operated as an evaporator, the temperature of the compressor 18 is too low, the refrigerant condenses and stays in the compressor 18, and the refrigerant in the system becomes insufficient. Problem arises.

Therefore, FIG. 6 shows a configuration diagram of a conventional compressor heat insulating member described in Patent Document 2. In FIG. As shown in FIG. 6, a structure has been proposed in which the compressor 18 is surrounded by a heat insulating material 24 such as glass wool so that the temperature of the compressor 18 does not drop too much.
JP 2002-277147 A JP-A-8-193590

  However, in the above-described conventional configuration, the compressor and the heat source side heat exchanger are air-cooled or heat-exchanged simultaneously by the heat radiating fan, so that the wind is applied to the compressor even during the heating operation, and the heat is radiated from the compressor. The heating capacity is reduced by the amount and the efficiency is reduced.

  Moreover, it is difficult for a compressor having a non-cylindrical outer shape such as a reciprocating compressor to be tightly enclosed with a heat insulating material.

  The present invention solves the above-mentioned conventional problems, while suppressing a heat radiation from the compressor while ensuring a sufficient air volume for the heat source side heat exchanger in the narrow machine room of the vending machine, An object is to provide a vending machine capable of increasing the heating efficiency.

In order to solve the above-described conventional problems, the vending machine of the present invention is a vending machine having a hot / cold switching chamber for storing products, and an indoor heat exchanger installed in the hot / cold switching chamber; An outdoor heat exchanger installed outside the compartment for storing the product, a compressor, a protective device that stops the compressor when overheated, and heat dissipation that allows heat exchange between the outdoor heat exchanger and air comprising a fan, and a guide that is disposed between the cooling fan and the compressor, before
As wind of the radiator fan for cooling the serial protection device for air-cooling the protective device without cooling the compressor, as well as linearly arranged and said outdoor heat exchanger and the protective device and the radiation fan The wind of the heat radiating fan blown in the direction of the compressor is guided to the protection device side by the guide to prevent the compressor from being air-cooled by the wind of the heat radiating fan .

  As a result, when the switching room is set to hot, it is possible to increase the heating capacity by suppressing the cooling of the compressor while maintaining the function of the protective device of the compressor, and a sufficient air volume for the outdoor heat exchanger. Can be secured.

The vending machine of the present invention can suppress heat dissipation from the compressor and improve the heating capability when the switching chamber is set hot . In addition, the start-up characteristics can be stabilized by air-cooling the protective device. As a result, it is possible to further reduce the amount of power consumed when heating using a heat pump.

The invention according to claim 1 is an automatic vending machine having a hot / cold switching chamber for storing products, and is installed outside an indoor heat exchanger installed in the hot / cold switching chamber and a compartment for storing products. An outdoor heat exchanger, a compressor, a protection device that stops the compressor when overheated, a heat radiating fan that exchanges heat between the outdoor heat exchanger and air, the heat radiating fan, and the compression The protection device and the heat dissipating fan, so that the wind of the heat dissipating fan that air-cools the protection device air-cools the protection device without air-cooling the compressor. with linearly disposed between the outdoor heat exchanger, the compressor is cooled wind of the heat dissipation fan blown in the direction of the compressor is guided to the protective apparatus by the guide in the wind of the radiator fan Ru Monodea that prevented the Rukoto. Ri by the above-described configuration, when setting the inside switching chamber in a hot wind of the radiator fan air cooled only protection device side of the compressor, since the compressor is not exposed to the wind, to suppress heat radiation from the compressor, Rutotomoni can improve the heating capacity, the outdoor heat exchanger can be ensured a sufficient air volume can be further reduced power consumption in the case of heating with a heat pump. In addition, the start-up characteristics can be stabilized by air-cooling the protective device.

  According to a second aspect of the present invention, in the first aspect of the invention, two of the heat dissipating fans are arranged in parallel, and only the heat dissipating fan on the protection device side is activated at the time of activation. While maintaining this function, cooling of the compressor can be suppressed more efficiently. In addition, during normal operation, a sufficient air volume can be secured for the outdoor heat exchanger by operating the two heat dissipating fans simultaneously.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a ventilation hole is provided below the protection device of the unit base on which the compressor, the heat radiating fan, and the outdoor heat exchanger are placed. Therefore, by guiding the wind of the heat radiating fan to the ventilation hole, it is possible to suppress the air blowing to the compressor, suppress the heat radiation from the compressor, and improve the heating capability.

The invention according to claim 4 is the invention according to any one of claims 1 to 3 , wherein a combustible refrigerant is used as the refrigerant of the cooling and heating system, and the combustible refrigerant is applied. Safety can be increased.

  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 refrigeration cycle diagram of a vending machine according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view of the vending machine according to Embodiment 1 of the present invention. FIG. 3 is a plan view of the machine room of the vending machine according to Embodiment 1 of the present invention. In addition, about the same structure action as the past, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 1, the interior of the vending machine is divided into three parts, a dedicated cooling compartment (hereinafter referred to as a left chamber), a cooling / heating chamber B (hereinafter referred to as a middle chamber), and a cooling / heating chamber C (hereinafter referred to as a right chamber). A use side unit 1A (specific use side unit), a use side unit 1B, and a use side unit 1C, which will be described in detail later, are provided corresponding to each of the chambers), 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.

  2 and 3, the vending machine main body 30 includes a hot / cold switching chamber 31 and a machine chamber 32. Inside the hot / cold switching chamber 31, an indoor heat exchanger 33, an indoor fan 34, and a heater 35 are installed. Inside the machine room 32, the compressor 18, a protective device 36 that stops the compressor 18 when overheated, and an outdoor heat exchanger to prevent insulation deterioration inside the compressor 18 when the compressor 18 becomes hot. 19, A heat dissipating fan 20 is installed.

  As shown in FIG. 3, between the outdoor heat exchanger 19 and the compressor 18, the radiating fans 20a and 20b are linearly positioned with respect to the protection device 36 of the compressor 18, and the radiating fans 20a and 20b are located outdoors. Two are installed in parallel to the heat exchanger 19. Also. A guide 37 is provided between the heat radiating fans 20a and 20b and the compressor 18 alone or in the outdoor so as to form an air passage for the heat radiating fans 20a and 20b so that the protective device 36 side is downstream as viewed from the outdoor heat exchanger 19. The heat exchanger 19 is attached. Further, a slit hole 39 is formed through the unit base 38 at a position directly below the protection device 36.

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

  The case where the left chamber and the middle chamber are cooled while the right chamber is heated will be described. The switching valve 5A of the heat source side heat exchanger 19 is opened, the switching valve 5B is closed, and the switching valve 10A of the utilization side heat exchanger 12B to be cooled is closed, the switching valve 10B is opened and heated. The switching valve 11A of the heat exchanger 12C 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 5A 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 by these 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 is supplied to the indoor heat exchangers 12A and 12B. It flows and evaporates.

  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, since the use side indoor heat exchanger 12C acts as a condenser, the right chamber is heated, and the left and middle chambers are cooled by the use side heat exchangers 12A and 12B acting as evaporators. It will be.

  The indoor fan 34 circulates the heat of the indoor heat exchanger 33 in the hot / cold switching chamber 31 and heats the heater. The heater 35 is a low temperature that reduces the heating capacity of the refrigeration cycle. It is energized when the outside temperature starts up.

  The heat radiating fans 20a and 20b exchange heat between the outdoor heat exchanger 19 and air. The guide 37 is disposed between the heat radiating fans 20a and 20b and the compressor, and the wind of the heat radiating fans 20a and 20b flows to the protective device 36 through the guide, so that the compressor 18 disposed outside the guide 37 is air-cooled. The heat dissipation from the compressor 18 can be suppressed. Further, at the time of start-up, by energizing only the heat dissipating fan 20a on the side close to the protective device 36 among the heat dissipating fans 20a and 20b, the start-up characteristics can be stabilized by air-cooling the protective device 36, and during normal operation The air flow to the outdoor heat exchanger 19 can be earned by operating all the heat radiating fans 20a and 20b. Further, the wind of the heat radiating fans 20a and 20b is sucked into a slit hole 39 provided immediately below the protective device 36, so that the flow of wind toward the compressor 18 can be prevented. As a result, if the condensation temperature of the indoor heat exchanger 33 rises and the load is the same, the operation rate of the compressor 18 can be reduced, the power consumption is reduced, and energy saving can be achieved.

  In FIG. 2 and FIG. 3, two radiating fans 20a and 20b are arranged. However, considering the compatibility between the capacity of the outdoor heat exchanger 19 and the air volume of the radiating fans 20a and 20b, the number of the radiating fans 20a and 20b is set to three or more. Also good.

  As described above, in the present embodiment, the guide 37 is disposed between the radiating fan 20 and the compressor, and the compressor 18 is not air-cooled by the wind from the radiating fans 20a and 20b. Heat dissipation from the compressor 18 is suppressed during heating of the heat pump, and the condensation temperature of the indoor heat exchanger 33 is increased. As a result, if the load is the same, the operation rate of the compressor 18 can be reduced, the power consumption is reduced, and energy saving can be achieved.

  As described above, the vending machine according to the present invention can maintain the temperature of the compressor at a high temperature when heating the heat pump, and can improve the heating capacity. it can.

Refrigeration cycle diagram of vending machine according to Embodiment 1 of the present invention 1 is a longitudinal sectional view of a vending machine according to Embodiment 1 of the present invention. The top view of the machine room of the vending machine in Embodiment 1 of this invention Refrigerant circuit diagram of a conventional vending machine Configuration diagram of conventional vending machine controller Configuration diagram of conventional compressor insulation member

Explanation of symbols

18 Compressor 19 Outdoor Heat Exchanger 20 Heat Dissipation Fan 36 Protection Device 37 Guide 38 Unit Base 39 Slit Hole

Claims (4)

In a vending machine having a hot / cold switching chamber for storing products, an indoor heat exchanger installed in the hot / cold switching chamber, an outdoor heat exchanger installed outside a compartment for storing products, and a compression , A protection device for stopping the compressor when overheated, a heat dissipating fan for exchanging heat between the outdoor heat exchanger and air, and a guide disposed between the heat dissipating fan and the compressor The protection device, the heat dissipation fan, and the outdoor heat exchanger are linearly arranged so that the wind of the heat dissipation fan that air- cools the protection device air- cools the protection device without air-cooling the compressor. JP that with placing, prevented that the compressor in the wind of the cooling fan wind of the radiator fan blown in the direction of the compressor is guided to the protective apparatus by the guide is air-cooled Vending machine to.   2. The vending machine according to claim 1, wherein two of the heat dissipating fans are arranged in parallel, and only the heat dissipating fan on the protection device side is activated at the time of start-up. The vending machine according to claim 1 or 2 , wherein a ventilation hole is provided below the protection device of the unit base on which the compressor, the heat radiating fan, and the outdoor heat exchanger are placed. The vending machine according to any one of claims 1 to 3 , wherein a combustible refrigerant is used as a refrigerant of the cooling and heating system.