JP2006004254A - Automatic vending machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic vending machine improving heating capacity by maintaining a temperature of a compressor 18 at a high temperature during heat pump heating operation. <P>SOLUTION: In the automatic vending machine, an independent air duct 36 is composed in a side of the compressor 18 installed in a machine chamber 32, and an outdoor heat exchanger 19 and a radiation fan 20 are arranged in an interior of the air duct 36. The radiation fan 20 is composed such that only the outdoor heat exchanger 19 in the air duct 36 is air-cooled. By this, the temperature of the compressor 18 can be maintained at a high temperature during the heat pump heating operation, and the heating capacity can be improved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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. 9 shows a refrigerant circuit diagram of a conventional vending machine described in Patent Document 1. As shown in FIG. As shown in FIG. 9, the interior of the vending machine is divided into three parts, a cooling exclusive storage (hereinafter referred to as the left chamber), a cooling and heating storage B (hereinafter referred to as the middle chamber), and a cooling and heating storage C (hereinafter referred to as the right). 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. 10 shows a configuration diagram of a control device for a conventional vending machine described in Patent Document 1. In FIG. As shown in FIG. 10, the control device C is composed of 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, middle and right chambers. 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.

  FIG. 11 shows a configuration diagram of a conventional vending machine described in Patent Document 1. In FIG. As shown in FIG. 11, the compressor 18 and the heat source side heat exchanger 19 are installed in the same air passage so that heat is simultaneously exchanged by the radiating fan 20.

  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.

  FIG. 12 shows a configuration diagram of a conventional compressor heat insulating member described in Patent Document 2. In FIG. As shown in FIG. 12, a structure is 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.

Moreover, the heat source side heat exchanger 19 is a fin tube heat exchanger having a high capacity.
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.

  In addition, when the air path is formed so that the wind does not hit the compressor and the conventional heat source side heat exchanger is used, the air volume decreases because the air path opening area is small, and the relative humidity of the air path outlet air increases. As a result, problems such as the occurrence of condensation in the vicinity of the heat exchanger or the outlet of the air passage arise.

  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 according to the present invention comprises an independent air passage in the left and right space area of the compressor, and an outdoor heat exchange formed by a spiral fin tube inside the air passage. A compressor and a heat dissipating fan are arranged, and the compressor is surrounded by a heat insulating material foam-molded in accordance with the shape of the upper surface of the compressor.

  As a result, a sufficient amount of air can be ensured even when the air passage cross-sectional area is small by using a spiral fin tube heat exchanger that does not receive wind on the compressor and has low air passage resistance.

  Further, by molding a heat-insulating material such as polypropylene foam in conformity with the shape of the upper surface of the compressor and enclosing the compressor, heat dissipation of the compressor can be suppressed while suppressing an increase in external dimensions.

  The vending machine of the present invention can suppress heat dissipation from the compressor and improve the heating capability. 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 condenser and a compartment for storing products in the hot / cold switching chamber. An outdoor heat exchanger formed of a spiral fin tube, a compressor, and a heat dissipating fan, forming an independent air passage in a space area in the left-right direction of the compressor, and the outdoor heat inside the air passage An exchanger and the heat dissipating fan are arranged, and the heat dissipating fan air-cools only the outdoor heat exchanger in the air passage, and the air does not hit the compressor, thereby suppressing heat dissipation from the compressor. Thus, the heating ability can be improved. In addition, by using an outdoor heat exchanger formed of a spiral fin tube, it is possible to prevent the formation of condensation even if the cross-sectional area of the air passage is small, and in the narrow machine room, the space in the left and right direction of the compressor can be used effectively. Effective for a wide range of vending machines.

  The invention according to claim 2 is an automatic vending machine having a hot / cold switching chamber for storing products, and is installed outside an indoor condenser installed in the hot / cold switching chamber and a compartment for storing products. An outdoor heat exchanger formed of a spiral fin tube, a compressor, and a heat dissipating fan, and an independent air passage is formed in an upper space area of the compressor, and the outdoor heat is formed inside the air passage. An exchanger and the heat dissipating fan are arranged, and the heat dissipating fan air-cools only the outdoor heat exchanger in the air passage, and the air does not hit the compressor, thereby suppressing heat dissipation from the compressor. Thus, the heating ability can be improved. In addition, by using an outdoor heat exchanger formed of a spiral fin tube, it is possible to prevent condensation even if the cross-sectional area of the air passage is small, and it is possible to effectively utilize the space above the compressor in a narrow machine room. It is effective for a vending machine having a compressor having a low height.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, a slit is provided in a part that forms the air passage on the compressor side, so that an air passage opening is formed around the compressor. Yes, even if the refrigerant leaks around the compressor, it can be prevented from being discharged out of the machine room through the slit and filling the inside of the machine room with the leaked refrigerant.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the compressor is surrounded by a heat insulating material foam-molded in accordance with the shape of the upper surface of the compressor, and the external dimensions are increased. The heat dissipation of the compressor can be suppressed while suppressing the above.

  According to a fifth aspect of the present invention, in the invention of the fourth aspect, the HC refrigerant is used, and the joint portion between the compressor and the pipe is exposed in the vicinity of the air passage opening, so that the compressor and the pipe are exposed. Even if the HC refrigerant leaks from the joint portion, the joint portion is exposed in the vicinity of the air passage opening at the top of the compressor, and therefore can be discharged out of the machine room by the heat radiating fan.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein a dew condensation sensor is attached to a pipe of an outdoor heat exchanger that functions as an evaporator, and dew condensation is detected by the dew condensation sensor. The operation of the heating system is stopped, and it is possible to prevent the condensed water from flowing out of the machine room.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein a water absorption sheet is provided in a dew condensation water storage portion of an air passage constituting member forming an air passage of the machine room. Yes, the dew condensation water discharged from the time the dew generation is detected until the operation is stopped is absorbed by the water absorption sheet, and the moisture of the water absorption sheet is determined by the heat from the compressor and the continuous operation of the heat dissipation fan for a predetermined time. As a result, the condensed water can be prevented from flowing out of the machine room.

  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. 3A is a plan view of the machine room of the vending machine according to Embodiment 1 of the present invention, and FIG. 3B is a cross-sectional 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.

  In FIG. 2, the vending machine body 30 includes a hot / cold switching chamber 31 and a machine room 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, a compressor 18, an outdoor heat exchanger 19, and a heat radiating fan 20 are installed. And the heat insulating material 56 is arrange | positioned so that the compressor 18 may be enclosed.

  As shown in FIGS. 3A and 3B, an independent air passage 36 is formed beside the compressor 18, and an outdoor heat exchanger 19 and a heat radiating fan 20 are arranged inside the air passage 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 dissipating fan 20 causes the air to flow through the air passage 36 to exchange heat between the outdoor heat exchanger 19 and the air. Since the heat radiating fan 20 and the outdoor heat exchanger 19 are housed in the air passage 36, the wind from the heat radiating fan 20 flows in the air passage 36, and the compressor 18 disposed outside the air passage 36 is air-cooled. No, heat dissipation from the compressor 18 can be suppressed. 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.

  At this time, since the air path 36 is not configured in the prior art, the wind generated by the heat radiating fan 20 causes heat exchange between the outdoor heat exchanger and the air, and the compressor 18 is air-cooled. The heat radiation from the machine is promoted, the condensation temperature of the indoor heat exchanger 33 is lowered, and the heating efficiency is lowered.

  In FIG. 2 and FIG. 3, two heat dissipating fans 20 are arranged, but in consideration of the compatibility between the capacity of the outdoor heat exchanger 19 and the air volume of the heat dissipating fan 20, one or three or more may be used. Good.

  Moreover, the heat dissipation of the compressor 18 can be suppressed by enclosing the compressor 18 with the heat insulating material 37 foam-molded in accordance with the shape of the upper surface of the compressor. As the heat insulating material 37, polypropylene foam (for example, EPP-15P made by JSP) having high heat insulating property and small heat deformation is desirable, and in the case of polystyrene foam as another heat insulating material, there is a problem of heat deformation in an atmosphere of 70 ° C. or higher. In the case of urethane, the heat resistance is increased, but the problem of hygroscopicity is generated, which is not preferable.

  As described above, in the present embodiment, the independent air passage 36 is formed beside the compressor 18, and the outdoor heat exchanger 19 and the heat radiating fan 20 are disposed inside the air passage 36. The compressor 18 is not air-cooled by the wind from the fan 20, and heat dissipation from the compressor 18 is suppressed when the heat pump is heated, 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.

  Further, in this embodiment, since the heat insulating material 37 surrounding the compressor 18 is foam-molded with polypropylene, the heat insulating property is high and the thermal deformation is reduced, and the heat dissipation of the compressor 18 is suppressed while suppressing the increase in the external dimensions. be able to.

  Note that the material of the heat insulating material 37 may be foamed rubber, which is characterized by high heat insulating properties and low thermal deformation as in the case of polypropylene materials.

(Embodiment 2)
FIG. 4 is a refrigeration cycle diagram of the vending machine according to the second embodiment of the present invention. FIG. 5 is an overall longitudinal sectional view of the vending machine according to the second embodiment of the present invention. FIG. 6 is a cross-sectional view of the machine room of the vending machine according to Embodiment 2 of the present invention. FIG. 7 is a perspective view of an outdoor heat exchanger according to Embodiment 2 of the present invention.

  As shown in FIG. 4, the vending machine of the present invention includes a storage chamber composed of a hot / cold switching chamber 31, a cold dedicated chamber 38, and a second cold dedicated chamber 39, R600a as a refrigerant, and a reciprocating type for high temperature. The hot / cold switching chamber 31 includes a compressor 50, an indoor condenser 51 installed in the hot / cold switching chamber 31, an outdoor heat exchanger 52 installed outside the storage chamber and acting as an evaporator, and an expansion valve 53. Has a heating system dedicated to heating.

  As shown in FIGS. 5 and 6, a compressor 46 is disposed in the machine room 32 of the vending machine 30. An independent air passage 50 is formed above the compressor 46, and the outdoor heat exchanger 48 and the heat radiating fan 20 are disposed inside the air passage 50. A slit 51 is provided on the lower surface side of the air passage 50, and a heat insulating material 52 is provided so as to surround the compressor 46. Further, a dew condensation sensor 53 that detects the presence or absence of dew condensation by being installed in a place where the evaporation temperature is reached is attached to the pipe of the outdoor heat exchanger 48. And the water absorption sheet | seat 52 which absorbs dew condensation water is provided in the compressor 46 side of the slit 51 provided in the air path 50, and the dew condensation water storage part 56 of the air path structure member 55 which comprises the air path 50. FIG.

  As shown in FIG. 7, a spiral fin tube heat exchanger 59 in which fins 58 are spirally wound around a tube 57 is used for the outdoor heat exchanger 48.

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

  First, when the hot / cold switching chamber 31 is cooled, the compressor 18 is driven after the high temperature compressor 46 is stopped. The refrigerant discharged from the compressor 18 is condensed by the outdoor heat exchanger 19 acting as a condenser, and then decompressed by the expansion valve A43, the expansion valve B44, and the expansion valve C45, respectively, and the indoor evaporator 40, evaporator 41, supplied to the second evaporator 42. Then, the refrigerant evaporated in the indoor evaporator 40, the evaporator 41, and the second evaporator 42 is refluxed to the compressor 18.

  At this time, the storage chamber that has reached a predetermined temperature among the hot / cold switching chamber 31, the cold dedicated chamber 38, and the second cold dedicated chamber 39 closes the corresponding expansion valve A43, expansion valve B44, and expansion valve C45. Stop supplying the refrigerant. Further, when all the storage rooms reach a predetermined temperature, the operation of the compressor 18 is stopped.

  Next, when the hot / cold switching chamber 31 is heated, the compressor 18 is operated while the expansion valve A43 is closed, and the cooling of the cold dedicated chamber 38 and the second cold dedicated chamber 39 is continued. The high temperature compressor 46 is driven. The refrigerant discharged from the high-temperature compressor 46 is condensed by the indoor condenser 47, decompressed by the expansion valve 49, and supplied to the outdoor heat exchanger 48. Then, the refrigerant evaporated in the outdoor heat exchanger 48 is returned to the high temperature compressor 46.

  As described above, since there is a dedicated heating system for heating the hot / cold switching chamber 31, the matching between the outdoor heat exchanger 48 and the high-temperature reciprocating compressor 46 designed for exclusive use is optimized. The durability of the machine 46 can be ensured and the efficiency can be improved.

  Further, when the outdoor heat exchanger 48 is disposed in the space above the compressor 46, the outdoor heat exchanger 48 is made compact in a planar shape by using a heat exchanger 59 formed of a spiral fin tube. . Furthermore, since the space | interval between the fins 58 of the spiral fin tube heat exchanger 59 is wide and connected in a spiral shape, the wind resistance is small, and even if the air passage cross-sectional area is small, a sufficient air volume is obtained. And it is possible to prevent dew condensation from occurring near the heat exchanger or the air channel outlet. Furthermore, it is difficult for dust to accumulate, and the occurrence of clogging between the fins 58 can be suppressed.

  The heat dissipating fan 20 causes the air to flow through the air passage 50 to exchange heat between the outdoor heat exchanger 48 and the air. Since the heat radiating fan 20 and the outdoor heat exchanger 48 are housed in the air passage 50, the wind from the heat radiating fan 20 flows through the air passage 50, and the compressor 46 disposed outside the air passage 50 is cooled by air. No, heat dissipation from the compressor 46 can be suppressed.

  Since the slit 51 is provided on the lower surface side of the air passage 50, the total area of the air inlet of the air passage 50 is increased, the amount of air sucked into the air passage 50 by the radiating fan 20 is increased, and the outdoor heat exchanger 48 and The heat exchange capacity of the increases.

  Further, when condensation is detected by the condensation sensor 53, the operation of the heating system is stopped.

  Further, the water absorption sheet 54 is provided in the compressor 46 side of the slit 51 provided in the air passage 50 and the dew condensation water storage portion 56 of the air passage constituting member 55 constituting the air passage 50, and the operation is stopped by detecting the occurrence of dew condensation. Condensed water discharged until then is absorbed by the water absorbing sheet 54. The moisture-containing absorption sheet 54 evaporates moisture by heat from the compressor 46 and continuous operation of the heat dissipation fan 20.

  In the heating-only heat pump, when the water absorbing sheet 54 is not provided, the condensed water may be led to the vicinity of the outdoor heat exchanger 19 on the cooling side or the compressor 18 and evaporated by exhaust heat on the cooling side. In this case, the efficiency on the cooling side is improved.

  As described above, in the present embodiment, the independent air passage 50 is formed above the compressor 46, and the heat exchanger 59 and the heat radiating fan 20 formed by the spiral fin tube are disposed inside the air passage 50. In view of the structure, the heat exchanger 59 is compact in a planar shape, and the space above the compressor 46 in the narrow machine room 32 can be effectively utilized. Further, even if the wind resistance is reduced and the cross-sectional area of the air passage is small, a sufficient amount of air can be secured, and condensation can be prevented from occurring near the outdoor heat exchanger 48 or the outlet of the air passage 50. Furthermore, it is difficult for clogging with dust to occur, and maintenance-free operation can be achieved.

  The compressor 46 is preferably a salient pole concentrated winding DC inverter compressor. Unlike the conventional distributed winding compressor, which is different from the manufacturing method in which the previously wound motor coil is inserted into the slot later, the winding pitch is very high because the motor coil is directly wound in the slot. Since the coil end dimension of the motor can be reduced to about 1/3 and the height dimension of the compressor can be kept low, a space above the compressor 46 can be easily secured.

  Further, if there is room in the space above the compressor 46, the spiral fin tube heat exchanger 59 constituting the outdoor heat exchanger 48 installed in the space may have a two-stage configuration in which the upper and lower sides are stacked. , Evaporating ability can be improved.

  Moreover, in this Embodiment, since the slit 51 is provided in the lower surface side of the air path 50, the total area of the suction inlet of the air path 50 becomes large, and the heat exchange capability with the outdoor heat exchanger 48 increases.

  Further, in the present embodiment, a dew condensation sensor 53 for detecting the presence or absence of dew condensation is provided in the lower side pipe of the outdoor heat exchanger 48, and the presence or absence of dew condensation is detected by being installed in a place where the evaporation temperature is reached. When the dew condensation sensor 53 detects dew condensation, the operation of the heating system is stopped and the dew condensation water is prevented from flowing out of the machine room 32.

  Further, in the present embodiment, the water absorption sheet 54 is provided on the compressor 46 side of the slit 51 provided in the air passage 50 and the dew condensation water storage unit 56, and the discharge is performed until the occurrence of dew condensation is detected and the operation is stopped. By absorbing the condensed water to be absorbed by the water absorbing sheet 54, it is possible to prevent the condensed water from flowing out of the machine room 32.

(Embodiment 3)
FIG. 8 is a cross-sectional view of the machine room of the vending machine according to Embodiment 3 of the present invention. In addition, about the structure effect | action same as Embodiment 2, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In FIG. 8, a discharge pipe 60 and a suction pipe 61 are attached to the compressor 46, and a joint portion between the discharge pipe 60 and the suction pipe 61 is exposed outside the heat insulating material 62 surrounding the compressor 45. Yes.

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

  First, the joint between the discharge pipe 60 and the pipe of the suction pipe 61 is exposed from the heat insulating material 62, and when the HC refrigerant is used, the HC refrigerant leaks from the joint between the discharge pipe 60 and the pipe of the suction pipe 61. Also, it is discharged out of the machine room 32 by the heat radiating fan 20 from the air passage opening (slit 51) above the compressor 46.

  As described above, in the present embodiment, since the joint portion of the discharge pipe 60 and the suction pipe 61 is exposed outside the heat insulating material 62 surrounding the compressor 46, the HC refrigerant leaks from the joint portion. In addition, it is possible to prevent the leakage refrigerant from being filled inside the machine chamber 32 from the slit 51 at the upper part of the compressor 46, and to further improve the safety against the ignition source.

  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. (A) is a top view of the machine room of the vending machine in Embodiment 1 of this invention. (B) is sectional drawing of the machine room of the vending machine in Embodiment 1 of this invention. Refrigeration cycle diagram of vending machine in Embodiment 2 of the present invention Whole longitudinal cross-sectional view of the vending machine in Embodiment 2 of this invention Sectional drawing of the machine room of the vending machine in Embodiment 2 of this invention The perspective view of the outdoor heat exchanger in Embodiment 2 of this invention Sectional drawing of the machine room of the vending machine in Embodiment 3 of this invention Refrigerant circuit diagram of a conventional vending machine Configuration diagram of conventional vending machine controller Configuration of conventional vending machine Configuration diagram of conventional compressor insulation member

Explanation of symbols

DESCRIPTION OF SYMBOLS 18 Compressor 19 Outdoor heat exchanger 20 Radiation fan 30 Vending machine main body 31 Hot / cold switching room 33 Indoor heat exchanger 36 Air path 48 Outdoor heat exchanger 50 Air path 51 Slit 52 Heat insulating material 53 Condensation sensor 54 Water absorption sheet 55 Air channel component 56 Condensate storage 59 Spiral fin tube heat exchanger

Claims (7)

  In a vending machine having a hot / cold switching chamber for storing products, outdoor heat formed by an indoor condenser installed in the hot / cold switching chamber and a spiral fin tube installed outside the compartment for storing products. The air conditioner includes an exchanger, a compressor, and a heat radiating fan, configures an independent air passage in a space area in the left-right direction of the compressor, and the outdoor heat exchanger and the heat radiating fan are disposed inside the air passage. A vending machine having a heating system characterized by that.   In a vending machine having a hot / cold switching chamber for storing products, outdoor heat formed by an indoor condenser installed in the hot / cold switching chamber and a spiral fin tube installed outside the compartment for storing products. An exchanger, a compressor, and a heat radiating fan are provided, and an independent air passage is formed in an upper space area of the compressor, and the outdoor heat exchanger and the heat radiating fan are disposed inside the air passage. A vending machine having a heating system characterized by that.   The heating system according to any one of claims 1 to 2, wherein an air passage opening is formed around the compressor by providing a slit in a part that forms the air passage on the compressor side. Having vending machine.   The vending machine having a heating system according to any one of claims 1 to 3, wherein the compressor is surrounded by a heat insulating material foam-molded in accordance with the shape of the upper surface of the compressor.   5. The vending machine having a heating system according to claim 4, wherein HC refrigerant is used and a joint portion between the compressor and the pipe is exposed in the vicinity of the air passage opening.   The dew condensation sensor is attached to the piping of the outdoor heat exchanger that works as an evaporator, and when dew condensation is detected by the dew condensation sensor, the operation of the heating system is stopped. Vending machine with a heating system.   The vending machine having a heating system according to any one of claims 1 to 6, wherein a water absorption sheet is provided in a condensed water storage portion of an air passage constituting member that forms an air passage of a machine room.

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