WO2009088057A1 - 自動販売機 - Google Patents

自動販売機 Download PDF

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Publication number
WO2009088057A1
WO2009088057A1 PCT/JP2009/050172 JP2009050172W WO2009088057A1 WO 2009088057 A1 WO2009088057 A1 WO 2009088057A1 JP 2009050172 W JP2009050172 W JP 2009050172W WO 2009088057 A1 WO2009088057 A1 WO 2009088057A1
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WO
WIPO (PCT)
Prior art keywords
refrigerant
heat exchanger
vending machine
heating
condenser
Prior art date
Application number
PCT/JP2009/050172
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
Toshiaki Tsuchiya
Yukihiro Takano
Yuuji Fujimoto
Koji Takiguchi
Naoki Inoshita
Shin Ishida
Yasutaka Sanuki
Takeshi Matsubara
Original Assignee
Fuji Electric Retail Systems Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2008002876A external-priority patent/JP4557010B2/ja
Application filed by Fuji Electric Retail Systems Co., Ltd. filed Critical Fuji Electric Retail Systems Co., Ltd.
Priority to CN2009801012268A priority Critical patent/CN101884057B/zh
Publication of WO2009088057A1 publication Critical patent/WO2009088057A1/ja

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F17/00—Coin-freed apparatus for hiring articles; Coin-freed facilities or services
    • G07F17/0064—Coin-freed apparatus for hiring articles; Coin-freed facilities or services for processing of food articles
    • G07F17/0071—Food articles which need to be processed for dispensing in a cold condition, e.g. ice and ice cream
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/04—Refrigeration circuit bypassing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • F25B2500/221—Preventing leaks from developing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/123—Sensors measuring the inside temperature more than one sensor measuring the inside temperature in a compartment

Definitions

  • the present invention relates to a vending machine that sells a product such as a beverage, such as a can, a bottle, a pack, or a plastic bottle, which is cooled or heated in a refrigerant circuit for sale.
  • a product such as a beverage, such as a can, a bottle, a pack, or a plastic bottle, which is cooled or heated in a refrigerant circuit for sale.
  • this vending machine uses the internal heat exchanger as an evaporator during cooling and as a condenser during heating, so the flow of refrigerant changes depending on the cooling and heating operation mode of the vending machine. As a result, there is a problem that the piping of the refrigeration circuit becomes complicated, resulting in high costs.
  • a refrigerant circuit is configured by providing two piping circuits for a cooling heat exchanger and a heating heat exchanger in one commodity storage.
  • Patent Document 2 JP 2002-298210 A JP 2006-11493 A
  • the present invention has been made in view of the above circumstances and aims to solve the problem 1), to efficiently perform a heat pump operation, and to provide a vending machine with low power consumption.
  • Another object of the present invention is to solve the problem 1), solve the problems 2) and 3), perform a heat pump operation more efficiently, and provide a vending machine with low power consumption. For the purpose.
  • a vending machine is a vending machine having a plurality of product storages for cooling or heating the product storage in an operation mode.
  • a refrigerating cycle is configured by a plurality of evaporators for evaporating the refrigerant provided in the product, and a heating heat exchanger for condensing the refrigerant is provided in the product storage, and the heating heat exchanger is connected to an outlet of the compressor.
  • the heating heat exchanger and the expansion means outlet side pipe are connected by a decompression pipe having a second expansion means.
  • the vending machine according to a second aspect of the present invention is the vending machine according to the first aspect, wherein the pressure reducing pipe connects the inlet side of the heating heat exchanger and the outlet side of the expansion means via a second electromagnetic valve. It is a connected bypass line.
  • the vending machine according to a third aspect of the present invention is the vending machine according to the first aspect, wherein the pressure reducing pipe is connected to the heating heat exchanger outlet side pipe and the expansion means outlet side via a third electromagnetic valve. It is characterized by being a bypass line connected between.
  • the vending machine according to claim 4 of the present invention is the vending machine according to claim 1, wherein an external heat exchanger is provided outside the product storage, and the decompression pipe is connected to the external heat exchanger via the external heat exchanger. It is a pipe line connected between the heating heat exchanger outlet side pipe line and the expansion means outlet side.
  • vending machine according to claim 5 of the present invention is characterized in that, in claim 4, the external heat exchanger has a structure integrated with the condenser.
  • vending machine according to claim 6 of the present invention is characterized in that, in claim 5, the external heat exchanger is arranged on the windward side of the condenser.
  • a vending machine according to claim 7 of the present invention is the vending machine according to claim 4, wherein the fourth and / or fifth electromagnetic valve is opened and closed on the downstream side of the condenser and the external heat exchanger.
  • Control means for controlling is provided, and the control means controls the refrigerant circulation amount by opening and closing the fourth and / or fifth electromagnetic valve.
  • the vending machine is the vending machine according to the seventh aspect, wherein the second expansion means is an electronic expansion valve, and the control means is at the start of simultaneous heating / cooling operation or cooling.
  • the electronic expansion valve is set to a predetermined opening, and the first side on the inlet side of the heating heat exchanger is set.
  • the amount of refrigerant circulating is controlled by opening the solenoid valve and then closing the solenoid valve at the condenser inlet.
  • the vending machine according to claim 9 of the present invention is the vending machine according to claim 7, wherein the second expansion means is an electronic expansion valve, and the control means is at the start of the cooling single operation or is heated and cooled.
  • the solenoid valve on the inlet side of the condenser is opened, and then the first solenoid valve on the inlet side of the heating heat exchanger is opened.
  • the solenoid valve is closed, the fourth solenoid valve is closed, and the electronic expansion valve is fully opened to control the refrigerant circulation amount.
  • the vending machine according to claim 10 of the present invention is the vending machine according to claim 7, further comprising condensation temperature detection means for detecting the condensation temperature of the heating heat exchanger, and the control means is detected by the condensation temperature detection means.
  • the refrigerant circulation amount is controlled by opening / closing the fourth and / or fifth electromagnetic valve based on the condensed temperature.
  • the vending machine according to claim 11 of the present invention is the vending machine according to claim 10, wherein when the condensing temperature detected by the condensing temperature detecting means is higher than a predetermined temperature, the control means The refrigerant circulation amount is controlled by closing the valve and opening the electromagnetic valve on the condenser inlet side in a time shorter than the previous operation time.
  • the control means when the condensing temperature detected by the condensing temperature detecting means is lower than a predetermined temperature, the control means is the fourth electromagnetic wave.
  • the refrigerant circulation amount is controlled by opening the valve for a predetermined time.
  • the vending machine is a vending machine having a plurality of product storages for cooling or heating the product storages according to the operation mode, the compressor compressing the refrigerant.
  • a refrigerating cycle is constituted by a plurality of evaporators, and a heating heat exchanger for condensing the refrigerant is provided in the commodity storage, and the heating heat exchanger is connected to an outlet of the compressor and an inlet of the condenser.
  • the heating heat exchanger and the expansion means outlet side pipe are connected by a pressure reducing pipe having a second expansion means, or the pressure reducing pipe is connected to the inlet side of the heating heat exchanger and the expansion
  • a bypass conduit connected to the outlet side of the means via a second solenoid valve, or the decompression pipeline is connected to the outlet side of the heating heat exchanger and the expansion means via a third solenoid valve Due to the bypass line connected between the outlet side and the refrigerant, the refrigerant leaking from the closed first electromagnetic valve when the heating operation is stopped passes through the third electromagnetic valve and the third expansion means, and the evaporator. As a result, the refrigerant circulation rate does not decrease, and as a result, the cooling efficiency can be maintained high.
  • a vending machine is the vending machine according to the first aspect, wherein an external heat exchanger is provided outside the product storage, and the pressure reducing line is connected to the heating heat via the external heat exchanger. Since it is a configuration that is a conduit connected between the exchanger outlet side conduit and the expansion means outlet side, in addition to the above effects, the external heat exchanger interpolates the heating heat radiation amount of the refrigeration cycle , It is possible to suppress a decrease in cooling capacity.
  • the vending machine according to claim 5-6 according to the present invention is the vending machine according to claim 4, wherein the external heat exchanger has a structure integrated with the condenser, and the external heat exchanger has the structure described above. Since the condenser has the common heat radiation fin 82 by being arranged on the windward side from the condenser, the heat radiation efficiency of the refrigerant flowing through the external heat exchange pipe and the condenser pipe is improved.
  • a vending machine is the vending machine according to the fourth aspect, wherein the fourth or / and fifth electromagnetic valve is controlled downstream of the condenser and the external heat exchanger, and the opening and closing of the electromagnetic valve is controlled.
  • Control means, and the control means can appropriately adjust the refrigerant circulation amount in each operation mode by controlling the refrigerant circulation amount by opening and closing the fourth and / or fifth electromagnetic valve. Since it is possible, cooling and heating operation can be performed with high efficiency.
  • the vending machine is the vending machine according to the seventh aspect, wherein the second expansion means is an electronic expansion valve, and the control means is at the start of simultaneous heating / cooling operation or cooling.
  • the electronic expansion valve is set to a predetermined opening, and the first side on the inlet side of the heating heat exchanger is set.
  • the refrigerant circulation amount is controlled by closing the solenoid valve at the condenser inlet
  • the second expansion means is an electronic expansion valve
  • the control means includes: Opening the solenoid valve on the condenser inlet side at the start of the cooling single operation, or when switching from the simultaneous heating and cooling operation to the cooling single operation, or after a certain time operation during the cooling single operation, Close the first solenoid valve on the inlet side of the heating heat exchanger, Of the solenoid valve is closed, it controls the refrigerant circulation amount in the fully open the electronic expansion valve.
  • the refrigerant stored in the condenser 62 and the evaporators 65a, 65b, and 65c during the single cooling operation is supplied to the heating heat exchangers 66b and 66c, or the stagnation and recovery leakage occurs during the single cooling operation.
  • the refrigerant circulation amount necessary for the single cooling operation is ensured, so that an appropriate refrigerant circulation amount can be obtained in each operation mode such as the simultaneous cooling and heating operation and the single cooling operation, and the cooling and heating operation is enhanced. Can be done with efficiency.
  • a vending machine is the vending machine according to the seventh aspect, wherein a condensation temperature detecting means for detecting a condensation temperature of the heating heat exchanger is provided, and the control means is in accordance with the condensation temperature detected by the condensation temperature detecting means. Since the refrigerant circulation amount is gradually controlled by opening and closing the fourth solenoid valve, an appropriate refrigerant circulation amount can be obtained, and the cooling / heating operation can be performed with high efficiency.
  • the vending machine according to claim 11-12 of the present invention is the vending machine according to claim 10, wherein the control means closes the fourth solenoid valve when the condensation temperature detected by the condensation temperature detection means is higher than a predetermined temperature.
  • the refrigerant circulation amount is controlled by opening the solenoid valve 68 on the inlet side of the condenser in a time shorter than the previous operation time, and the condensation temperature detected by the condensation temperature detection means is lower than the predetermined temperature.
  • the fourth solenoid valve is closed for a predetermined time to control the refrigerant circulation amount to be slightly increased.
  • the refrigerant circulation amount can be finely adjusted, and the cooling / heating operation can be performed with high efficiency.
  • FIG. 3 shows a refrigerant flow in the refrigerant circuit diagram of FIG. 3, (a) is a circuit diagram showing a refrigerant flow in the operation mode CCC, (b) is a circuit diagram showing a refrigerant flow in the operation mode CCH, c) is a circuit diagram showing the flow of refrigerant in the operation mode CHH. It is a refrigerant circuit figure concerning Example 2 of the present invention. It is a refrigerant circuit figure concerning Example 3 of the present invention.
  • FIG. 7 shows the refrigerant flow in the refrigerant circuit diagram of FIG. 7, (a) is a circuit diagram showing the refrigerant flow in the operation mode CCC, (b) is a circuit diagram showing the refrigerant flow in the operation mode CCH, c) is a circuit diagram showing the flow of refrigerant in the operation mode CHH. It is a refrigerant circuit figure concerning Example 4 of the present invention. It is a schematic diagram which shows the piping structure of a condenser, (a) is a top view, (b) is a front view. It is a refrigerant circuit figure concerning Example 5 of the present invention. FIG. 11 shows the flow of refrigerant in the refrigerant circuit diagram of FIG.
  • FIG. 11 is a circuit diagram showing the flow of refrigerant when adjusting the circulation amount of refrigerant, and (b) is when adjusting the circulation amount of another refrigerant. It is a circuit diagram which shows the flow of the refrigerant
  • FIG. 14 is a control block diagram of FIG. 13. It is a flowchart which shows the control which adjusts the refrigerant
  • (a) is a circuit diagram when supplying a refrigerant
  • (b) is a circuit diagram when collect
  • It is a refrigerant circuit figure concerning Example 7 of the present invention.
  • It is a control block diagram concerning Example 7 of the present invention.
  • It is a flowchart which adjusts the refrigerant
  • 3 is a flowchart for finely adjusting a refrigerant circulation amount during operation.
  • FIG. 1 is a perspective view showing the vending machine according to the first embodiment of the present invention
  • FIG. 2 is a cross-sectional view of the vending machine shown in FIG. 1
  • FIG. 3 shows the first embodiment of the present invention. It is the refrigerant circuit figure which concerns.
  • 4 shows a block diagram of the control device
  • FIG. 5 shows a refrigerant flow in the refrigerant circuit diagram of FIG.
  • (a) is a circuit diagram showing a refrigerant flow in the operation mode CCC
  • (b) is a circuit diagram. It is a circuit diagram which shows the flow of the refrigerant
  • (c) is a circuit diagram which shows the flow of the refrigerant
  • the vending machine includes a main body cabinet 10 formed as a rectangular heat insulator having an open front surface, an outer door 20 and an inner door 30 provided on the front surface, and an interior of the main body cabinet 10 up and down.
  • the bottom plate 11 is divided into two stages and the upper part is cooled by, for example, three independent product storage units 40a, 40b, and 40c divided by two heat insulating partition plates 40w, and the lower product storage units 40a, 40b, and 40c are cooled.
  • the machine room 50 for storing the heating / cooling unit 60 to be heated and the temperature sensor T in the product storage 40a, 40b, 40c are disposed inside the outer door 20, and the vending machine is cooled and heated.
  • control means 90 for controlling.
  • 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, and is a box-shaped structure that is divided into two upper and lower stages and has a heat insulator inside.
  • the upper inner door 30a is pivotally supported at one end on the outer door 20 and locked at the other end to the outer door 20 so that the upper inner door 30a is opened at the same time as the outer door 20 is opened. It is intended to facilitate replenishment.
  • the lower inner door 30b has one end pivotally supported on the main body cabinet 10 and the other end hooked on the main body cabinet 10 with a latch (not shown), and the outer door 20 is opened. 10 is prevented from flowing out cool air or warm air in the product storage boxes 40a, 40b, 40c, and can be opened as needed during maintenance.
  • the product storage units 40a, 40, 40 are for storing products such as canned beverages and beverages containing plastic bottles while maintaining the desired temperature, and the capacity of the storage units is the product storage units 40a, 40c. , 40b in a large manner.
  • the product storage case 40a is exclusively used for cooling, and the product storage cases 40c and 40b 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 expansion valve 63, a flow divider 64, and evaporators 65a, 65b, and 65c in the product storage box that straddle the bottom plate 11 as refrigerant pipes. And a heating unit in which the compressor 61 and the heating heat exchangers 66b and 66c are connected by a refrigerant pipe. Depending on the operation mode, cold air or hot air is circulated in the product storage. The product S in the product storage rack R is cooled or heated.
  • a fan 62f is installed at the rear of the condenser 62.
  • the fan 62f sucks air from the front opening of the machine room 50, sucks heat of condensation by the condenser 62, and absorbs exhaust heat of the compressor 61. In order to exhaust to the rear opening of the machine room 50.
  • the evaporators 65a, 65b, and 65c are for cooling the product storages 40a, 40b, and 40c, and are installed in the lower part of each product storage.
  • the heating heat exchangers 66b and 66c are installed in front of the evaporators 65b and 65c, and are for heating the product storage boxes 40b and 40c.
  • the evaporators 65a, 65b, 65c and the heating heat exchangers 66b, 66c are surrounded by a wind tunnel 67 in each product storage 40a, 40b, 40c, a fan 65f is installed in front of them, and a duct 67d is installed in the rear. Is provided.
  • the air cooled or heated by the evaporators 65a, 65b, 65c and the heating heat exchangers 66b, 66c is blown to the product S in the product storage and collected from the duct 67d. Done in
  • the piping exiting from the compressor 61 is connected to a condenser 62 via electromagnetic valves 68 and 69, and the piping exiting from the condenser 62 is connected to an expansion valve 63 (capillary) via a check valve 71. It is connected to the.
  • the piping from the expansion valve 63 (which may be an expansion means or a capillary) is connected to the flow divider 64, and is connected from the flow divider 64 to the evaporators 65a, 65b, and 65c via the electromagnetic valves 70a, 70b, and 70c.
  • the pipes from the containers 65a, 65b, and 65c are gathered and connected to the compressor 61.
  • the piping exiting from the compressor 61 is connected to the heating heat exchangers 66b and 66c via the first electromagnetic valves 68b and 68c, and the piping exiting the heating heat exchangers 66b and 66c is connected to the check valve 71, Collected via 71 and connected to a solenoid valve 68.
  • the piping from the electromagnetic valve 68 is connected to a bypass pipe 70 in parallel with the condenser 62 via the electromagnetic valve 74.
  • bypass pipes 75b and 75c are connected from pipes connecting the first electromagnetic valves 68b and 68c and the heating heat exchangers 66b and 66c, and are gathered via the second electromagnetic valves 73b and 73c. It is connected to the piping between the expansion valve 63 and the flow divider 64 via the expansion valve 72 (second expansion means).
  • the bypass pipes 75b and 75c, the second electromagnetic valves 73b and 73c, and the bypass pipe composed of the second expansion valve 72 (second expansion means) constitute a decompression pipe.
  • a refrigerant used within a critical pressure for example, a fluorocarbon refrigerant, R134a is used.
  • the control means 90 controls cooling or heating according to the operation mode of the product storage 40a, 40b, 40c, has a CPU and a memory inside, and opens / closes the electromagnetic valve of the refrigerant circuit by setting the operation mode setting SW91. Take control.
  • the control means 90 is operated by the electromagnetic valves 68, 69, 70a, 70b, 70c, 73b, and 73c. Is opened and the solenoid valves 68b, 68c, 74 are closed. As shown in FIG.
  • the high-temperature refrigerant compressed by the compressor 61 is condensed by the condenser 62 to become liquid refrigerant, expands by the expansion valve 63 and becomes low-temperature gas-liquid two-phase refrigerant, and the flow divider 64 Is divided into three directions and evaporated in the evaporators 65a, 65b, and 65c, thereby cooling the product storage boxes 40a, 40b, and 40c.
  • the refrigerant turned into gas is returned to the compressor 61 and operated until the refrigeration cycle reaches an appropriate temperature.
  • the first electromagnetic valves 68b and 68c are closed, some high-temperature refrigerant may leak due to the discharge pressure of the compressor 61.
  • This leaked refrigerant flows from the first electromagnetic valves 68b and 68c into the expansion valve 72 through the bypass circuits 75b and 75c via the second electromagnetic valves 73b and 73c. Since the leaked refrigerant that has flowed in has a low pressure on the outlet side of the expansion valve 72, it is expanded by the second expansion valve 72, flows into the evaporators 65a, 65b, and 65c from the flow divider 64 and evaporates to become a low-temperature gaseous refrigerant. .
  • the refrigerant leaked from the first electromagnetic valves 68b and 68c is collected as a circulating refrigerant without staying in the heating heat exchangers 66b and 66c, so that the amount of refrigerant circulation in the circuit is not reduced.
  • the cooling capacity is kept high.
  • the control means 90 sets the electromagnetic valves 68c, 69, 70a, 70b, 73b.
  • the solenoid valves 68, 68b, 70c, 73c, and 74 are closed.
  • the high-temperature refrigerant compressed by the compressor 61 flows into the heating heat exchanger 66c through the first electromagnetic valve 68c and is condensed to become liquid refrigerant, which heats the commodity storage 40c. To do.
  • the condensed refrigerant is further condensed by the condenser 62, expanded by the expansion valve 63 to become a low-temperature gas-liquid two-phase refrigerant, divided into two by the flow divider 64, and by the evaporators 65a and 65b. It evaporates and the goods storage 40a, 40b is cooled.
  • the refrigerant turned into gas in the evaporators 65a and 65b returns to the compressor 61, and the refrigeration cycle is continuously operated until the internal temperature reaches an appropriate temperature.
  • the refrigerant leaking from the closed first electromagnetic valve 68b flows into the second expansion valve 72 from the bypass circuit 75b via the second electromagnetic valve 73b as described above, and is expanded. Since the refrigerant flows into the evaporators 65a and 65b, evaporates and is collected, the cooling capacity is maintained high without reducing the refrigerant circulation amount of the circuit.
  • the control unit 90 opens the electromagnetic valves 68b, 68c, 70a, and 74.
  • the electromagnetic valves 68, 69, 70b, 70c, 73b, 73c are closed.
  • the high-temperature refrigerant compressed by the compressor 61 flows into the heating heat exchangers 66b and 66c via the first electromagnetic valves 68b and 68c and is condensed, and the product storage case 40b, Heat 40c.
  • the condensed liquid refrigerant is expanded by the expansion valve 63 via the electromagnetic valve 74 and the bypass circuit 70 to become a low-temperature gas-liquid two-phase flow, and is evaporated by the evaporator 65a from the flow divider 64. To be cooled.
  • FIG. 6 is a refrigerant circuit diagram according to the second embodiment of the present invention, and shows the flow of the refrigerant in the operation mode CCC.
  • the bypass pipe 75 is connected to a pipe connected to the outlets of the heating heat exchangers 66b and 66c.
  • 73 and a third expansion valve (expansion means) 72 and connected to the inlet portion of the distributor 64.
  • An electromagnetic valve 79 is provided between the electromagnetic valve 68 and the bypass pipe 75 inlet.
  • bypass pipe composed of the bypass pipe 75, the third electromagnetic valve 73, and the third expansion valve (expansion means) 72 constitutes a decompression pipe.
  • the control means 90 when operating in the CCC operation mode, opens the electromagnetic valves 68, 69, 70a, 70b, 70c, 73, and closes the electromagnetic valves 68b, 68c, 74, 79. At this time, the refrigerant leaking from the electromagnetic valves 68b and 68c expands via the heating heat exchangers 66b and 66c from the bypass circuit 75 via the third electromagnetic valve 73 and the third expansion valve 72. Since it flows into the flow divider 64, the refrigerant circulation amount of the refrigerant circuit is reduced, and the cooling capacity is not lowered.
  • FIG. 7 shows a refrigerant circuit diagram according to the third embodiment of the present invention
  • FIG. 8 shows a refrigerant flow in the refrigerant circuit diagram of FIG. 7, and (a) shows a refrigerant flow in the operation mode CCC.
  • It is a circuit diagram
  • (b) is a circuit diagram which shows the flow of the refrigerant
  • (c) is a circuit diagram which shows the flow of the refrigerant
  • the difference from the first embodiment is that the pipes connected to the outlets of the heating heat exchangers 66b and 66c instead of the bypass pipes 75b and 75c and the second electromagnetic valves 73b and 73c are provided outside the commodity storage.
  • the refrigerant pipe 77a is connected through the external heat exchanger 76, and the refrigerant pipe 77b is connected to the inlet portion of the distributor 64 through the third expansion valve 72a.
  • the compressor 61 is provided with an accumulator 78 for separating the gas-liquid refrigerant in the inlet side pipe.
  • Other configurations are substantially the same as those of the first embodiment, and thus the description thereof is omitted.
  • the bypass line consisting of the external heat exchanger 76 and the third expansion valve 72a connected to the outlets of the heating heat exchangers 66b and 66c constitutes a pressure reducing line.
  • the control unit 90 opens the electromagnetic valves 68, 70a, 70b, and 70c, and closes the electromagnetic valves 68b and 68c.
  • the high-temperature refrigerant compressed by the compressor 61 is condensed in the condenser 62 to become liquid refrigerant, expands in the expansion valve 63 and becomes a low-temperature gas-liquid two-phase flow, and in the flow divider 64
  • the product is divided into three directions and evaporated by the evaporators 65a, 65b, 65c, and the product storage boxes 40a, 40b, 40c are cooled.
  • the refrigerant that has become gas returns to the compressor 61 via the accumulator 78 and is operated until the refrigeration cycle reaches an appropriate temperature.
  • the refrigerant leaking from the closed first electromagnetic valves 68b and 68c enters the external heat exchanger 76 through the heating heat exchangers 66b and 66c and is condensed.
  • the condensed leaked refrigerant is expanded by the third expansion valve 72a via the refrigerant pipe 77a, flows into the evaporators 65a, 65b, and 65c from the flow divider 64 and evaporates to become a low-temperature gaseous refrigerant.
  • the leaked refrigerant is recovered as a circulating refrigerant without staying in the heating heat exchangers 66b and 66c and the external heat exchanger 76, so that the cooling capacity is reduced without reducing the refrigerant circulation amount of the circuit. Is kept high.
  • the control means 90 opens the electromagnetic valves 68c, 70a, and 70b, and closes the electromagnetic valves 68, 68b, and 70c.
  • the high-temperature refrigerant compressed by the compressor 61 flows into the heating heat exchanger 66c and is condensed to heat the commodity storage 40c.
  • the high-temperature refrigerant condensed by the heating heat exchanger 66c is further condensed by the external heat exchanger 76, and expanded by the third expansion valve 72a via the refrigerant pipe 77a.
  • the refrigerant expanded by the third expansion valve 72a becomes a low-temperature gas-liquid two-phase refrigerant, is divided by the flow divider 64, is evaporated by the evaporators 65a and 65b, and the product storage boxes 40a and 40b are cooled.
  • the refrigerant turned into gas in the evaporators 65a and 65b returns to the compressor 61, and the refrigeration cycle is continuously operated until the internal temperature reaches an appropriate temperature.
  • the refrigerant leaking from the closed first electromagnetic valve 68b enters the external heat exchanger 76 through the heating heat exchanger 66b as described above, is condensed, and is then condensed by the third expansion valve 72a. Since the refrigerant is expanded and flows into the evaporators 65a and 65b to evaporate and is recovered, the cooling capacity is maintained high without reducing the refrigerant circulation amount of the circuit.
  • the heat exchangers that condense are the heating heat exchanger 66c and the external heat exchanger 76, and the heat exchangers that evaporate are the evaporators 65a and 65b.
  • the cooling capacity is prevented from being lowered.
  • the control means 90 opens the electromagnetic valves 68b, 68c, 70a, and closes the electromagnetic valves 68, 70b, 70c.
  • the high-temperature refrigerant compressed by the compressor 61 flows into the heat exchangers 66b and 66c and is condensed to heat the product storage boxes 40b and 40c.
  • the high-temperature refrigerant condensed by the heating heat exchangers 66b and 66c is further condensed by the external heat exchanger 76 and expanded by the third expansion valve 72a via the refrigerant pipe 77a.
  • the refrigerant expanded by the third expansion valve 72a becomes a low-temperature gas-liquid two-phase flow, evaporates by the evaporator 65a via the flow divider 64, and the commodity storage 40a is cooled.
  • the refrigerant turned into gas in the evaporator 65a returns to the compressor 61 and is operated until the refrigeration cycle reaches an appropriate temperature.
  • the heat exchangers that condense are heating heat exchangers 66b and 66c and the external heat exchanger 76, and the heat exchanger that evaporates becomes the evaporator 65a.
  • the cooling capacity is prevented from being lowered.
  • FIG. 9 shows a refrigerant circuit diagram according to the fourth embodiment of the present invention
  • FIG. 10 is a schematic diagram showing the piping configuration of the condenser, (a) is a plan view, and (b) is a front view. .
  • the condenser 82 has two independent pipes, one on the windward side as shown by the white arrow in FIG. 10 (a) and the wind flow of the fan 62f. It has a three-pitch external heat exchange pipe 82b and a condensing pipe 82a which is a pipe other than the pipe at the upper position, and these pipes are configured to be thermally coupled to a common radiating fin 82c. Accordingly, the external heat exchange pipe 82b disposed on the windward side can exchange heat more efficiently than the condensing pipe 82a. Further, as shown in the operation mode of FIG.
  • the condenser 62 and the external heat exchanger 76 are connected.
  • the refrigerant will not flow at the same time. Therefore, since the condenser 82 has the heat radiation fins 82c common to the external heat exchange pipe 82b and the condensation pipe 82a, the heat radiation efficiency of the refrigerant is improved corresponding to the area of the heat radiation fins 82c. .
  • the fan 62f is a so-called propeller fan, is driven by a variable speed motor, and is rotationally controlled by the internal temperature sensors Ta, Tb, Tc. That is, when the room to be heated is higher than the set temperature in the refrigerator, the cooling capacity of the refrigeration cycle is increased by rotating the fan 62f at full speed and increasing the heat radiation by the external heat exchange pipe 82b. When the heating chamber is lower than the internal set temperature, the fan 62f is decelerated or stopped to reduce or stop the heat radiation by the external heat exchange pipe 82b, and the heating capacity of the heating heat exchangers 66b and 66c. Increase.
  • the fan 62f is operated at full speed.
  • the fan 62f is operated at medium speed or low speed, and the room for heating operation is set in the store temperature. If it is lower, the fan 62f is stopped.
  • the condenser 82 when the vending machine is operated, the condenser 82 is used when the refrigerant flows through the condensation pipe 82a during the cooling single operation or when the refrigerant flows through the external heat exchange pipe 82b during the cooling and heating simultaneous operation.
  • the heat exchange is efficiently performed as compared with the case where the condenser 62 and the external heat exchanger 76 are separately provided.
  • the external heat exchange pipe 82b is disposed on the windward side of the condenser 82, it is not affected by the wake of the condenser pipe 82a, so that the performance of the cooling / heating operation is improved.
  • FIG. 11 shows a refrigerant circuit diagram according to the fifth embodiment of the present invention
  • FIG. 12 shows a refrigerant flow in the refrigerant circuit diagram of FIG. 11, and (a) is when adjusting the circulation amount of the refrigerant.
  • It is a circuit diagram which shows the flow of a refrigerant
  • (b) is a circuit diagram which shows the flow of a refrigerant
  • Example 3 The difference from Example 3 is that the fourth electromagnetic valve 80 is provided on the outlet side of the condenser 62, and the fifth electromagnetic valve 81 is provided on the outlet side of the external heat exchanger 76.
  • Other configurations are substantially the same as those of the third embodiment, and thus the description thereof is omitted. Further, since the operation in the operation mode is substantially the same as that of the third embodiment, the description thereof is omitted.
  • the refrigerant circulation amount suitable for the operation mode In the operation mode, reducing the refrigerant circulation rate in the order of the CCC mode, the CCH mode, and the CHH mode results in a cooling / heating operation with high efficiency. In order to reduce the amount of refrigerant circulation, the refrigerant may be retained in a heat exchanger that is not being used.
  • the solenoid valve of the refrigerant circuit is set to reduce the refrigerant circulation amount.
  • the control means 90 opens the electromagnetic valves 68c, 70a, 70b, 80, 81, and closes the electromagnetic valves 68, 68b, 70c.
  • the refrigerant compressed by the compressor 61 is condensed by the heating heat exchanger 66c and the external heat exchanger 76, expanded by the third expansion valve 72a, evaporated by the evaporators 65a and 65b, and returned to the compressor 61. Cycle through the cycle.
  • the refrigerant staying in the condenser 62 during operation in the CCC mode is sucked at a low pressure by the third expansion valve 72a and flows into the evaporators 65a and 65b through the expansion valve 63, so that the appropriate retention When the amount is reached, the refrigerant circulation amount can be reduced by closing the fourth electromagnetic valve 80.
  • FIG. 12B shows another embodiment.
  • the control means 90 opens the electromagnetic valves 68, 68c, 70a, 70b, 80 and closes the electromagnetic valves 68b, 70c, 81.
  • the refrigerant compressed by the compressor 61 is condensed by the condenser 62, expanded by the expansion valve 63, evaporated by the evaporators 65 a and 65 b, and circulated in the refrigeration cycle returning to the compressor 61.
  • the refrigerant compressed by the compressor 61 is accumulated in the heating heat exchanger 66c and the external heat exchanger 76 via the expansion valve 68c, so that the refrigerant staying in the condenser 62 corresponding to that amount.
  • the amount of refrigerant circulation can be reduced by opening the fifth solenoid valve 81 and closing the solenoid valve 68 and the fourth solenoid valve 80 when the appropriate amount of residence is reached.
  • the electronic valve may be simply set in the CCC mode operation.
  • the change to the CHH mode is the same.
  • the circulation amount of the refrigerant can be appropriately adjusted in each operation mode, so that the cooling / heating operation is performed with high efficiency. be able to.
  • FIG. 13 shows a refrigerant circuit diagram according to Embodiment 6 of the present invention
  • FIG. 14 shows a control block diagram of FIG.
  • FIG. 15 is a flowchart showing control for adjusting the refrigerant circulation amount of the vending machine according to the sixth embodiment of the present invention
  • FIG. 16 is an operation diagram of the electromagnetic valve and the electronic expansion valve in each operation condition.
  • FIG. 17 is a circuit diagram showing the flow of the refrigerant at the time of the step of FIG. 15, (a) is a circuit diagram when the refrigerant is supplied to the heating heat exchanger, and (b) is a time when the refrigerant is recovered in the condenser. A circuit diagram is shown.
  • the difference from the fifth embodiment is that the fifth electromagnetic valve 81 on the outlet side of the external heat exchanger 76 is omitted and an electronic expansion valve 79 is used as the second expansion means 72a. 11, the fan 62f for the condenser 62 and the external heat exchanger 76, the internal temperature sensors Ta, Tb. Tc is illustrated. As shown in FIG. 14, an electronic expansion valve 79 is connected to the control means 90a. Further, since the operation in the operation mode during normal operation is substantially the same as that of the fifth embodiment, the description thereof is omitted.
  • Example 6 of the present invention in each operation mode, when the cooling and heating simultaneous operation is started, when the internal temperature of the chamber of 1 or 2 reaches a predetermined set temperature and the operation becomes the cooling alone, or On the contrary, when the cooling-only operation is switched to the cooling-heating simultaneous operation, the refrigerant that has fallen into the heating heat exchangers 65b and 65c during operation or when the operation time has elapsed, such as when the operation time has accumulated, has been circulated. This is related to operation control in order to properly adjust the refrigerant circulation amount.
  • the event in which this control is performed is shown in the operation diagram of FIG.
  • the first column in FIG. 16 is a number (No.), the second column is an operation mode, the third column is an event, the fourth column is a control pattern, the fifth column and thereafter are solenoid valves 68, 68c, 68b, 70a, 70b, The operations of 70c and 80 and the electronic expansion valve 79 are shown.
  • “ ⁇ ” indicates opening of the solenoid valve
  • ⁇ ” indicates closing.
  • ⁇ 1 indicates that the solenoid valve 80 is opened several tens of seconds to several minutes after closing
  • “ ⁇ 2” indicates that the electronic expansion valve 79 is fully opened several tens of seconds to several minutes after the predetermined opening degree.
  • ⁇ indicates that the electronic expansion valve 79 has a predetermined opening degree corresponding to the internal temperature.
  • the opening / closing operation is performed every predetermined time.
  • control by event is in the case of all-chamber cooling operation mode (CCC mode), at the start of operation (No1 in FIG. 16), in the case of cooling / heating operation mode (CCH mode, CHC mode, CHH mode).
  • CCC mode all-chamber cooling operation mode
  • CHC mode CHC mode
  • CHH mode cooling / heating operation mode
  • steps S13 to S22 in the case of performing the cooling and heating simultaneous operation which is the control pattern 1 for supplying the refrigerant to the heating heat exchangers 66b and 66c, and the cooling alone that is the control pattern 2 for collecting the refrigerant in the condenser 62.
  • the operation is divided into steps S33 to S42 when the operation is performed.
  • the internal temperature is read from the internal temperature sensors Ta, Tb, and Tc (S11), and the operation state of cooling and heating of each chamber is determined (S12). If it is during cooling / heating simultaneous operation or when switching to simultaneous cooling / heating operation (S13 / Yes), when the compressor 61 starts operation in the next step, or when switching from cooling single operation to simultaneous cooling / heating operation, or operation time It is determined whether or not a certain period of time has elapsed (S14). If this condition is not satisfied (S14 / No), the process returns to the first step S11.
  • the electronic expansion valve 79 on the outlet side of the external heat exchanger 76 is set to a predetermined opening degree (S15).
  • the first electromagnetic valve 68c on the inlet side of the heating heat exchanger 66c is opened (S17), and after a predetermined time (S18), the electromagnetic valve 68 on the inlet side of the condenser 62 is closed (S19). .
  • the refrigerant is exchanged between the condenser 62 and the evaporators 65a, 65b and 65c by the compressor 61 through the first electromagnetic valve 68c and the heating heat exchanger 66c and the external heat exchange.
  • control unit 90a is configured so that the heating heat exchanger 66b, During the single cooling operation, the first solenoid valves 68b and 68c on the outlet side of 66c are opened, and then the solenoid valve 68 on the inlet side of the condenser 62 is closed to control the refrigerant circulation amount. Since the refrigerant stored in the condenser 62 and the evaporators 65a, 65b, and 65c is supplied to the heating heat exchangers 66b and 66c, an appropriate refrigerant circulation amount can be obtained, and cooling and heating operations can be performed with high efficiency. be able to.
  • Step S11 since the branch is No in this case, the process proceeds to Step S33.
  • Step S34 it is determined whether or not the compressor 61 starts operation, switches from simultaneous cooling and heating operation to single cooling operation, or when the operation time has accumulated a fixed time (S34). If this condition is not satisfied (S34 / No), the process returns to the first step (S11). If this condition is satisfied (S34 / Yes), the following refrigerant adjustment is performed.
  • the first electromagnetic valve 68 on the inlet side of the condenser 62 is opened (S35), and after a certain time has elapsed. (S36), the electromagnetic valve 68c on the inlet side of the heating heat exchanger 66c is closed (S37), and after a predetermined time has passed (S38), the fourth electromagnetic valve 80 on the outlet side of the condenser 62 is closed. (S39). After a predetermined time has elapsed (S40), the electronic expansion valve 79 on the outlet side of the external heat exchanger 76 is fully opened (S41).
  • the outlet side of the condenser 62 is shut off as shown in FIG. 17B, and the refrigerant stored in the heating heat exchangers 66b and 66c and the external heat exchanger 76 is recovered by the condenser 62.
  • the opening degree of the electronic expansion valve 79 is returned to a predetermined position, and a normal cooling operation is performed (S42).
  • the heating heat exchanger 66c and the storage including the amount that the refrigerant leaked from the first electromagnetic valve 68b during the single cooling operation cannot be recovered through the electronic expansion valve 79 in the heating heat exchanger 66b. Since the refrigerant stored in the external heat exchanger 76 is supplied to the condenser 62, an appropriate refrigerant circulation amount can be obtained and the cooling operation can be performed with high efficiency.
  • control unit 90a is configured to enter the inlet of the condenser 62 at the start of the single cooling operation, at the time of switching from the simultaneous heating / cooling operation to the single cooling operation, or after the fixed time operation during the single cooling operation.
  • Side first solenoid valve 68 is opened, then the first solenoid valves 68b and 68c on the inlet side of the heating heat exchangers 66b and 66c are closed, the fourth solenoid valve 80 is closed, and the electron
  • the expansion valve 79 By fully opening the expansion valve 79 and controlling the amount of refrigerant circulation, the refrigerant that has fallen into stagnation during the single cooling operation is recovered and the refrigerant circulation amount necessary for the single cooling operation is ensured. Operation can be performed with high efficiency.
  • FIG. 18 shows a refrigerant circuit diagram according to Embodiment 7 of the present invention
  • FIG. 19 shows a control block diagram.
  • FIG. 20 is a flowchart for adjusting the refrigerant circulation amount when the operation mode is switched.
  • the refrigerant circulation amount is controlled by the condensing temperature.
  • the first temperature sensor 84 for detecting the condensing temperature is provided on the outlet side of the heating heat exchangers 66c and 66b.
  • the second temperature sensor 85 for detecting the condensation temperature is provided on the outlet side of the condenser 62.
  • the fan 62f for the condenser 62 and the external heat exchanger 76, and the internal temperature sensors Ta, Tb, and Tc, which are not shown in FIG. 11, are illustrated.
  • a first temperature sensor 84 and a second temperature sensor 85 are connected to the control means 90b. Further, since the operation in the operation mode is substantially the same as that of the fifth embodiment, the description thereof is omitted.
  • control operation when switching from the three-chamber cooling operation mode (CCC operation mode) to the cooling / heating operation mode (HCC, CHC, HHC operation mode) is taken as an example in the HHC operation mode. This will be explained when switching to
  • the first electromagnetic valves 68b and 68c on the heating heat exchangers 66b and 66c side are opened, the electromagnetic valve 68 is closed (S51), the inside temperature sensors Ta, Tb and Tc, and the first temperature sensor 84. Then, temperature data is read from the second temperature sensor 85 (S52). The controller 90b adjusts the electronic expansion valve 72a and the fan 62f based on the temperature data (S53). If the condensation temperature detected by the first temperature sensor 84 is equal to or higher than an abnormality determination value (for example, 80 ° C.) (S54 / Yes), the fourth solenoid valve 80 on the outlet side of the condenser 62 is closed (S55).
  • an abnormality determination value for example, 80 ° C.
  • the solenoid valve 68 is opened for a predetermined time (for example, 2 minutes) (S56).
  • a predetermined time for example, 1 minute
  • the solenoid valve 68 is opened for a predetermined time (for example, 2 minutes) (S56).
  • the refrigerant circulating through the heating heat exchangers 66b and 66c is recovered by the condenser 62, and the refrigerant circulation amount is reduced.
  • the inside temperature sensor Ta If the temperature detected by Tb and Tc satisfies a target value (for example, -2 to 8 ° C for cooling, 50 to 65 ° C for heating) (S57 / Yes), the operation of the compressor 61 is stopped (S58). .
  • the inside temperature sensor Ta for example, -2 to 8 ° C for cooling, 50 to 65 ° C for heating
  • step S57 If the temperatures detected by Tb and Tc do not satisfy the target values (S57 / No), the process returns to step S53 for adjusting the electronic expansion valve 72a and the fan 62f. If the condensation temperature is equal to or lower than the abnormality determination value in step S54 (S54 / No), the inside temperature sensor Ta. The electronic expansion valve 72a and the fan 62f are adjusted and the refrigerant staying in the condenser 62 is adjusted until the temperatures detected by Tb and Tc satisfy the target values (S57).
  • the first temperature sensor 84 (condensation temperature detection means) for detecting the condensation temperature of the heating heat exchangers 66b and 66c is provided, and the control means 90b performs the first operation according to the condensation temperature detected by the condensation temperature detection means. Since the refrigerant circulation amount is gradually controlled by opening and closing the electromagnetic valve 80, an appropriate refrigerant circulation amount can be obtained, and cooling and heating operations can be performed with high efficiency.
  • Example 8 The vending machine according to the eighth embodiment of the present invention relates to control for finely adjusting the circulation amount of the refrigerant by the condensation temperature after the cooling and heating simultaneous operation (heat pump operation), and will be described with reference to the flowchart of FIG. .
  • FIG. 21 is a flowchart for finely adjusting the refrigerant circulation amount during operation, and the refrigerant circuit diagram and the control block diagram are substantially the same as those in the seventh embodiment, and thus the description thereof is omitted. As an example, a case where the vehicle is operating in the HHC operation mode will be described.
  • the first electromagnetic valves 68b and 68c on the heating heat exchangers 66b and 66c side are opened, the electromagnetic valve 68 is closed (S61), and the inside temperature sensor Ta. Temperature data is read from Tb, Tc, the first temperature sensor 84, and the second temperature sensor 85 (S62).
  • the control means 90b adjusts the electronic expansion valve 72a and the fan 62f based on the temperature data (S63). If the condensation temperature detected by the first temperature sensor 84 is other than the lower limit value T1 and the upper limit value T2 (S64 / No), it is first determined whether the condensation temperature is the upper limit value T2 (S65), and the condensation temperature is the upper limit value.
  • the fourth solenoid valve 80 located on the outlet side of the condenser 62 is closed (S66), and the time on the inlet side of the condenser 62 is less than the previous operation time.
  • the first electromagnetic valve 68 is opened (S67).
  • the refrigerant circulating through the heating heat exchangers 66b and 66c is recovered by the condenser 62, the refrigerant circulation amount is reduced, and it can be finely adjusted to an appropriate refrigerant circulation amount.
  • the inside temperature sensor Ta If the temperature detected by Tb and Tc satisfies a target value (for example, ⁇ 2 to 8 ° C.
  • step S69 determines whether the condensation temperature is lower than the lower limit value T1
  • step S68 determines whether the condensation temperature is equal to or lower than the lower limit value T1
  • step S70 the fourth solenoid valve 80 on the outlet side of the condenser 62 is opened for a certain time (S70).
  • step S64 If the condensation temperature detected by the first temperature sensor 84 in step S64 is between the lower limit value T1 and the upper limit value T2 (S64 / Yes), the process proceeds to step S68 without adjusting the refrigerant circulation amount. Internal temperature sensor Ta. The above-described control is continued until the temperatures detected by Tb and Tc satisfy the target value.
  • the control means 90b closes the fourth electromagnetic valve 80 and performs the condenser 62 in a time shorter than the previous operation time.
  • the refrigerant circulation amount is controlled by opening the solenoid valve 68 on the inlet side of the refrigerant.
  • the control means 90b controls the fourth electromagnetic valve 80 to be slightly increased by opening the fourth electromagnetic valve 80 for a predetermined time. .
  • the vending machine according to the present invention is suitable for cooling or heating products such as beverages in containers such as cans, bottles, packs, and PET bottles in a refrigerant circuit.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
PCT/JP2009/050172 2008-01-10 2009-01-09 自動販売機 WO2009088057A1 (ja)

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CN102479406A (zh) * 2010-11-19 2012-05-30 松下电器产业株式会社 自动售货机
US8756943B2 (en) * 2011-12-21 2014-06-24 Nordyne Llc Refrigerant charge management in a heat pump water heater
JP2016206753A (ja) * 2015-04-16 2016-12-08 富士電機株式会社 自動販売機
JP6805759B2 (ja) * 2016-11-29 2020-12-23 富士電機株式会社 冷媒回路装置
CN108507265B (zh) * 2018-03-05 2020-09-01 合肥华凌股份有限公司 制冷设备的风冷组件和具有其的制冷设备
KR20200118968A (ko) * 2019-04-09 2020-10-19 엘지전자 주식회사 공기 조화 장치

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Publication number Priority date Publication date Assignee Title
JP2004184019A (ja) * 2002-12-05 2004-07-02 Fuji Electric Retail Systems Co Ltd 自動販売機の庫内冷却／加熱装置
JP2005107764A (ja) * 2003-09-30 2005-04-21 Sanden Corp 自動販売機
JP2007328762A (ja) * 2006-05-10 2007-12-20 Fuji Electric Retail Systems Co Ltd 冷却加熱装置および自動販売機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004184019A (ja) * 2002-12-05 2004-07-02 Fuji Electric Retail Systems Co Ltd 自動販売機の庫内冷却／加熱装置
JP2005107764A (ja) * 2003-09-30 2005-04-21 Sanden Corp 自動販売機
JP2007328762A (ja) * 2006-05-10 2007-12-20 Fuji Electric Retail Systems Co Ltd 冷却加熱装置および自動販売機

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