JP4992477B2 - vending machine - Google Patents

Description

  The present invention relates to a vending machine that sells products such as canned beverages by cooling or heating them and simultaneously heating them using waste heat generated by cooling.

  In recent years, there has been an increasing demand for power consumption reduction for vending machines, and as a means for reducing power consumption, vending machines that simultaneously heat using waste heat generated by cooling have been proposed (for example, Patent Document 1).

  Hereinafter, a conventional vending machine will be described with reference to the drawings.

  FIG. 6 is a refrigerant circuit diagram of a conventional vending machine, and FIG. 7 is a Mollier diagram of the refrigerant of the conventional vending machine.

  As shown in FIG. 6, the conventional vending machine includes a storage room composed of a hot / cold switching room 1, a cold dedicated room 2, and a second cold dedicated room 3, and is installed in the hot / cold switching room 1. The switching chamber evaporator 4 which is a finned tube heat exchanger, the switching chamber condenser 5 which is a finned tube heat exchanger installed in the hot / cold switching chamber 1, and the evaporator 6 which is installed in the cold dedicated chamber 2 And a second heating unit 7 installed in the second cold chamber 2, an outdoor heat exchanger 8 installed outside the storage chamber, and a cooling and heating system including a compressor 9.

  The expansion valve A10, the expansion valve B11, the expansion valve C12, and the resistor 13 each have a closing function while reducing the pressure of the refrigerant passing therethrough. The on-off valve A14, the on-off valve B15, and the on-off valve C16 are respectively It controls the presence or absence of refrigerant flow.

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

  When the hot / cold switching chamber 1 is cooled, the on-off valve A14 and the on-off valve C16 are opened, the on-off valve B15 and the resistor 13 are closed, and the compressor 9 is driven. The refrigerant discharged from the compressor 9 is condensed in the outdoor heat exchanger 8, and then decompressed by the expansion valve A10, the expansion valve B11, and the expansion valve C12, respectively, and the switching chamber evaporator 4, the evaporator 6, and the second To the evaporator 7. Then, the refrigerant evaporated in the switching chamber evaporator 4, the evaporator 6, and the second evaporator 7 is returned to the compressor 9.

  At this time, the storage chamber that has reached a predetermined temperature among the hot / cold switching chamber 1, the cold dedicated chamber 2, and the second cold dedicated chamber 3 closes the corresponding expansion valve A10, expansion valve B11, and expansion valve C12. Then, supply of the refrigerant is stopped. Further, when all the storage rooms reach a predetermined temperature, the operation of the compressor 9 is stopped.

  Next, when heating the hot / cold switching chamber 1, the on-off valve A14, the on-off valve C16, and the expansion valve A10 are closed, the on-off valve B15 and the resistor 13 are opened, and the compressor 9 is driven. The refrigerant discharged from the compressor 9 is partially condensed in the switching chamber condenser 5 and again condensed in the outdoor heat exchanger 8, and then decompressed by the expansion valve B11 and the expansion valve C12, respectively. , And supplied to the second evaporator 7. Then, the refrigerant evaporated in the evaporator 6 and the second evaporator 7 returns to the compressor 9.

  At this time, the refrigerant is in the state shown in the Mollier diagram of FIG. In FIG. 6, the horizontal axis represents the enthalpy of the refrigerant, and the vertical axis represents the pressure of the refrigerant. In FIG. 6, point A is the state of the refrigerant sucked by the compressor 9, point B is the state of refrigerant discharged from the compressor 9, point C is the state of the outlet of the switching chamber condenser 5, and point D is the resistor 13. The state of the outlet, point E is the state of the outlet of the outdoor heat exchanger 8, and point F is the state of the outlets of the expansion valve B11 and the expansion valve C12.

  Here, the pressure of the evaporator 6 and the second evaporator 7 is P1, the pressure of the switching chamber condenser 5 is P2, and the pressure of the outdoor heat exchanger 8 is P3. The evaporation temperature of the second evaporator 7 is substantially the same, but the switching chamber condenser 5 connected in series via the resistor 13 can maintain a higher pressure than the outdoor heat exchanger 8, and Since the superheated steam passes, a high blown air temperature can be realized.

  At this time, the cooling work (h2-h1) and the heating work (h3-h4) are simultaneously performed with respect to the work amount (h3-h2) of the compressor 9 in FIG. Compared with the case of performing h3-h4), an operation with higher efficiency can be realized.

  Further, since the condensation pressure of the outdoor heat exchanger 8 is lower than that of the switching chamber condenser 5, the enthalpy at the outlet of the outdoor heat exchanger 8 can be lowered from h1 ′ to h1, and relatively large cooling work (h2 By realizing -h1), more efficient operation could be realized.

  As a result, even when the condensation pressure of the outdoor heat exchanger 8 is lowered at a low outdoor temperature, the switching chamber condenser 5 can maintain a relatively high condensation temperature and condensation pressure, and the hot / cold switching chamber 1 can be Since it can be heated efficiently, a highly efficient vending machine using waste heat can be applied even in regions where the outside air temperature is low in winter.

Further, the storage chamber that has reached a predetermined temperature in the cold dedicated chamber 2 and the second cold dedicated chamber 3 closes the expansion valve B10 and the expansion valve C11 to stop the supply of the refrigerant. Further, when all the storage rooms reach a predetermined temperature, the operation of the compressor 9 is stopped.
JP 2005-227833 A

  However, the conventional configuration requires three on-off valves for switching between cooling and heating of the hot / cold switching chamber, and there is a problem that the cost of the system increases.

  An object of the present invention is to solve the conventional problems, and to provide an inexpensive vending machine by reducing the number of on-off valves necessary for switching between cooling and heating in a hot / cold switching chamber. To do.

  In addition, in the above-described conventional configuration, when it is assumed that two fin tube heat exchangers are provided in the hot / cold switching chamber, the space in the warehouse is reduced and the space for storing the product is reduced. There was a problem.

  Another object of the present invention is to solve the conventional problems, and by reducing the space occupied by the switching chamber evaporator and the switching chamber condenser, the product storage space of the hot / cold switching chamber is increased, and the product storage. It is to provide a highly efficient vending machine.

  In order to solve the above-described conventional problems, the vending machine of the present invention has a plurality of product storages, and at least one of the product storages is a cold dedicated room, and at least one of the product storages is in the product storage. In a vending machine with a hot / cold switching chamber as a chamber, a compressor, a switching chamber evaporator and switching chamber condenser installed in the hot / cold switching chamber, an evaporator installed in the cold chamber, and product storage An outdoor condenser installed outside the storage, a pipe connecting the switching room condenser and the outdoor condenser, a resistor that reduces pressure when the refrigerant passes, an outlet pipe of the compressor, and an inlet of the switching room condenser A first switching valve that connects the piping to the inlet piping of the outdoor condenser, and a second switching valve that connects the outlet piping of the switching chamber condenser, the inlet piping of the resistor, and the switching chamber evaporator. When cooling cold switching room, switch The second switching valve is opened so that the outlet pipe of the condenser and the switching chamber evaporator communicate with each other, and the refrigerant discharged from the compressor is condensed by the outdoor condenser via the first switching valve, and then the switching chamber. When the hot / cold switching chamber is heated while supplying to the evaporator and the evaporator, the second switching valve is opened so that the outlet pipe of the switching chamber condenser and the resistor communicate with each other. A part of the discharged refrigerant is condensed in the switching chamber condenser via the first switching valve, then supplied to the outdoor condenser through the resistor, condensed again, and then flowed to the evaporator It is what.

  As a result, the on-off valve required for switching between cooling and heating in the hot / cold switching chamber can be eliminated, and the cost of the system can be reduced.

  The vending machine of the present invention can reduce the cost of the system by reducing the number of valves required when switching between cooling and heating of the hot / cold switching chamber.

  The invention according to claim 1 of the present invention has a plurality of product storages, at least one of the product storages is a cold dedicated room, and at least one of the product storages is hot / cold switched In a vending machine with a room, it is installed outside the compressor, the switching room evaporator and switching room condenser installed in the hot / cold switching room, the evaporator installed in the cold room, and the product storage. Installed in the pipe connecting the outdoor condenser, the switching room condenser and the outdoor condenser, and the pressure reducing unit when the refrigerant passes, the outlet pipe of the compressor, the inlet pipe of the switching room condenser, and the outdoor condenser A first switching valve that connects the inlet piping and a second switching valve that connects the outlet piping of the switching chamber condenser, the inlet piping of the resistor, and the switching chamber evaporator, and cools the hot / cold switching chamber. If the The second switching valve is opened so that the room evaporator communicates, and the refrigerant discharged from the compressor is condensed by the outdoor condenser through the first switching valve, and then supplied to the switching chamber evaporator and the evaporator. In addition, when heating the hot / cold switching chamber, the second switching valve is opened so that the outlet pipe of the switching chamber condenser and the resistor communicate with each other, and the refrigerant discharged from the compressor is first discharged. It is a vending machine characterized in that a part is condensed with a switching chamber condenser via a switching valve, then supplied to the outdoor condenser through a resistor, condensed again, and then flowed to the evaporator. Therefore, the cost of the system can be reduced by reducing the number of valves required when switching between cooling and heating in the hot / cold switching chamber.

  The invention according to claim 2 of the present invention has a plurality of product storages, at least one of the product storages is a cold dedicated room, and at least one of the product storages is hot / cold switched In a vending machine with a room, it is installed outside the compressor, the switching room evaporator and switching room condenser installed in the hot / cold switching room, the evaporator installed in the cold room, and the product storage. Installed in a pipe connecting the outdoor condenser, the switching room condenser and the outdoor condenser, and decompressing the refrigerant when passing through the refrigerant, the outlet pipe of the compressor, the outlet pipe of the resistor, and the inlet of the switching room condenser When the hot / cold switching chamber is cooled, the refrigerant discharged from the compressor is condensed by the outdoor condenser via the four-way valve when the pipe and the inlet pipe of the outdoor condenser are connected. After that, supply to the switching chamber evaporator and evaporator In addition, when heating the hot / cold switching chamber, the refrigerant discharged from the compressor is partially condensed in the switching chamber condenser via the four-way valve, and then passed through the resistor and the four-way valve. The vending machine is characterized in that it is supplied to the outdoor condenser, condensed again, and then flowed to the evaporator, so the number of valves required for switching between cooling and heating in the hot / cold switching room is reduced. Thus, the cost of the system can be reduced, and when the hot / cold switching chamber is cooled, the piping from the resistor to the second switching valve can be maintained at a low pressure, and the amount of refrigerant filled can be reduced.

  The invention according to claim 3 of the present invention includes a four-way valve main body forming a first flow passage in the four-way valve therein, a first inlet pipe opened inside the four-way valve main body, a second inlet pipe, and a first outlet. By moving the pipe, the second outlet pipe, and the four-way valve main body, the second inlet pipe and the first outlet pipe, or the second inlet pipe and the second outlet pipe communicate with each other, and the second flow path in the four-way valve. And a four-way valve composed of a four-way valve flow passage configured to partition the first flow passage in the four-way valve and the second flow passage in the four-way valve, and a first inlet pipe and a compressor outlet pipe. Since the vending machine is characterized by connecting the second inlet pipe and the resistor outlet pipe, the second inlet pressure of the four-way valve is changed to the first inlet pressure when the hot / cold switching chamber is heated. Can be improved, the sealing performance of the second flow path in the four-way valve can be improved. It is possible to prevent performance degradation due to les.

  Embodiments of a vending machine according to the present invention will be described below with reference to the drawings. In addition, about the same structure as the past, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

(Embodiment 1)
FIG. 1 is a refrigerant circuit diagram of a vending machine according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the vending machine according to the present embodiment includes a storage room including a hot / cold switching room 1, a cold dedicated room 2, and a second cold dedicated room 3. The switching chamber evaporator 4 which is a finned tube heat exchanger installed in the switch chamber, the switching chamber condenser 5 which is a finned tube heat exchanger installed in the hot / cold switching chamber 1, and the cold dedicated chamber 2 Cooling composed of an evaporator 6, a second evaporator 7 installed in the second cold chamber 3, an outdoor heat exchanger (outdoor condenser) 8 installed outside the storage room, and a compressor 9. Has a heating system.

  An expansion valve A10 is provided between the outdoor heat exchanger 8 and the switching room evaporator 4, an expansion valve B11 is provided between the outdoor heat exchanger 8 and the evaporator 6, and the outdoor heat exchanger 8 and the second evaporator 7 are provided. Between them, an expansion valve C is installed, which lowers the pressure of the refrigerant passing therethrough and has a closing function.

  The first switching valve 17 connects the compressor discharge pipe 18, the switching chamber condenser inlet pipe 19, and the resistor outlet pipe 20 to switch the flow path. The second switching valve 21 connects the switching chamber condenser outlet pipe 22, the compressor suction pipe 23, and the resistor inlet pipe 24 to switch the flow path.

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

  When the hot / cold switching chamber 1 is cooled, the first switching valve 17 is switched to connect the compressor discharge piping 18 and the resistor outlet piping 20, and the second switching valve 21 is switched to switch the switching chamber condenser outlet piping 22. The compressor suction pipe 23 is communicated.

  In this state, the refrigerant discharged from the compressor 9 is condensed by the outdoor heat exchanger 8 and then decompressed by the expansion valve A10, the expansion valve B11, and the expansion valve C12, respectively, and the switching chamber evaporator 4 and evaporator 6 and supplied to the second evaporator 7. Then, the refrigerant evaporated in the switching chamber evaporator 4, the evaporator 6, and the second evaporator 7 circulates to the compressor 9.

  At this time, the storage chamber that has reached a predetermined temperature among the hot / cold switching chamber 1, the cold dedicated chamber 2, and the second cold dedicated chamber 3 closes the corresponding expansion valve A10, expansion valve B11, and expansion valve C12. Then, supply of the refrigerant is stopped. Further, when all the storage rooms reach a predetermined temperature, the operation of the compressor 9 is stopped.

  Next, when the hot / cold switching chamber 1 is heated, the first switching valve 17 is switched to connect the compressor discharge pipe 18 and the switching chamber condenser inlet pipe 19, and the second switching valve 21 is switched to condense the switching chamber. The vessel outlet pipe 22 and the resistor inlet pipe 24 are communicated, and the expansion valve A10 is closed.

  In this state, the refrigerant discharged from the compressor 9 is partially condensed in the switching chamber condenser 5 and again condensed in the outdoor heat exchanger 8, and then decompressed by the expansion valve B11 and the expansion valve C12, respectively. , To the evaporator 6 and the second evaporator 7. Then, the refrigerant evaporated in the evaporator 6 and the second evaporator 7 circulates to the compressor 9.

  At this time, the storage chamber that has reached a predetermined temperature in the cold dedicated chamber 2 and the second cold dedicated chamber 3 closes the expansion valve B11 and the expansion valve C12 to stop the supply of the refrigerant. Further, when the temperature of the hot / cold switching chamber 1 reaches a predetermined temperature, the first switching valve 17 is switched to connect the compressor discharge pipe 18 and the resistor outlet pipe 20, and the second switching valve 21 is turned on. Switching is performed so that the switching chamber condenser outlet pipe 22 and the compressor suction pipe 23 communicate with each other, the circuit is switched so that the refrigerant does not flow into the switching chamber condenser 5, and cooling is performed so as to flow into the evaporator 6 and the second evaporator 7. Only to do. Further, when all the storage rooms reach a predetermined temperature, the operation of the compressor 9 is stopped.

  As described above, in the present embodiment, the number of switching valves can be reduced from three to two as compared with a conventional vending machine. Thereby, the cost of the switching valve can be reduced.

  Therefore, it can be set as the vending machine with a low system cost.

  Further, the condenser is divided into the switching chamber condenser 5 and the outdoor heat exchanger 8, and the internal volume relationship is such that the internal volume of the switching chamber condenser 5 is smaller than the internal volume of the outdoor heat exchanger 8. It is comprised so that it may become. This is because when the hot / cold switching chamber 1 is heated, it is necessary to heat the heated product to about 50 to 55 ° C. Therefore, it is necessary to set the condensation temperature of the switching chamber condenser 5 to 50 to 70 ° C., and the switching chamber so that the high-temperature and high-pressure refrigerant gas discharged from the compressor 9 can be maintained at 50 to 70 ° C. by the switching chamber condenser 5. By configuring the condenser 5 to be small and compact, the amount of heat exchanged indoors can be suppressed, the condensation temperature can be kept high, and the product can be heated to 50 to 55 ° C.

  Then, the refrigerant is cooled by sufficiently exchanging heat in the outdoor heat exchanger 8 on the downstream side, and the cooling efficiency in the evaporator 6 and the second evaporator 7 can be increased.

  In addition, the product heated to 50 to 55 ° C. is arranged several stages upstream from the lowest product held in the unloading means (not shown) provided in the lower part in the hot / cold switching chamber 1. Since it is only a product, it can be heated to a sufficiently appropriate temperature by the switching chamber condenser 5 that is smaller than the outdoor heat exchanger 8, and the evaporator 4 is disposed below the discharge means in the hot / cold switching chamber 1. Can be arranged side by side, and can be arranged without narrowing the storage space for goods.

(Embodiment 2)
FIG. 2 is a refrigerant circuit diagram of a vending machine according to Embodiment 2 of the present invention, and FIG. 3 is a cross-sectional view of a four-way valve of the vending machine according to the embodiment. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 2, the vending machine according to the present embodiment includes a storage room including a hot / cold switching room 1, a cold dedicated room 2, and a second cold dedicated room 3. The switching chamber evaporator 4 which is a finned tube heat exchanger installed in the switch chamber, the switching chamber condenser 5 which is a finned tube heat exchanger installed in the hot / cold switching chamber 1, and the cold dedicated chamber 2 It has a cooling and heating system including an evaporator 6, a second evaporator 7 installed in the second cold chamber 3, an outdoor heat exchanger 8 installed outside the storage chamber, and a compressor 9. .

  An expansion valve A10 is provided between the outdoor heat exchanger 8 and the switching room evaporator 4, an expansion valve B11 is provided between the outdoor heat exchanger 8 and the evaporator 6, and the outdoor heat exchanger 8 and the second evaporator 7 are provided. Between them, an expansion valve C12 is installed, which lowers the pressure of refrigerant passing therethrough and has a closing function.

  As shown in FIG. 3, the four-way valve 25 has a first inlet pipe 27, a second inlet pipe 28, a first outlet pipe 29, and a second outlet pipe 30, and the first inlet pipe 27 and the second inlet pipe 30. The communication between the pipe 28 and the first outlet pipe 29 and the second outlet pipe 30 is switched by moving the flow path 31 in the four-way valve, and the four-way valve into which the refrigerant flows into the four-way valve 25 from the first inlet pipe 27. The inner first flow path 32 and the second flow path 33 in the four-way valve into which the refrigerant flows from the second inlet pipe 28 are divided. The switching operation of the flow path 31 in the four-way valve is performed by a relatively inexpensive electromagnetic coil 34.

  The compressor discharge pipe 18 and the first inlet pipe 27, the resistor outlet pipe 20 and the second inlet pipe 28, the switching chamber condenser inlet pipe 19 and the first outlet pipe 29 are connected to the outdoor heat exchanger (outdoor condensation). Vessel) The inlet pipe 26 and the second outlet pipe 30 are connected to switch the flow path.

  Further, an on-off valve D35 is provided between the switching chamber condenser outlet pipe 22 and the compressor suction pipe 23, and opens and closes the flow paths of the switching chamber condenser outlet pipe 22 and the compressor suction pipe 23.

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

  When the hot / cold switching chamber 1 is cooled, the four-way valve 25 is switched to connect the compressor discharge pipe 18 and the outdoor heat exchanger inlet pipe 26, and the switching chamber condenser inlet pipe 19 and the resistor outlet pipe 20 are connected. Let Further, the on-off valve D35 is opened, and the compressor suction pipe 23 and the switching chamber condenser outlet pipe 22 are communicated.

  In this state, the refrigerant discharged from the compressor 9 is condensed by the outdoor heat exchanger 8 and then decompressed by the expansion valve A10, the expansion valve B11, and the expansion valve C12, respectively, and the switching chamber evaporator 4 and evaporator 6 and supplied to the second evaporator 7. Then, the refrigerant evaporated in the switching chamber evaporator 4, the evaporator 6, and the second evaporator 7 circulates to the compressor 9.

  The storage chamber that has reached a predetermined temperature among the hot / cold switching chamber 1, the cold dedicated chamber 2, and the second cold dedicated chamber 3 closes the corresponding expansion valve A10, expansion valve B11, and expansion valve C12. Stop supplying the refrigerant. Further, when all the storage rooms reach a predetermined temperature, the operation of the compressor 9 is stopped.

  At this time, in the vending machine according to the first embodiment, when the hot / cold switching chamber 1 is set to cooling, the piping from the second switching valve 21 to the resistor 13 becomes high pressure. On the other hand, in the present embodiment, the opening and closing valve D35 is open, so that the pressure in the pipe including the switching chamber condenser 5 and the resistor 13 can be reduced, and the refrigerant density in the pipe is reduced. As a result, the amount of accumulated refrigerant can be reduced.

  As a result, the amount of the enclosed refrigerant can be reduced, the cost of the refrigerant can be reduced, and the amount of the leaked refrigerant can be reduced even when an HC-based flammable refrigerant is used as the refrigerant or in the event of leakage. Therefore, safety can be improved.

  Moreover, since the pressure in the four-way valve second flow path 33 can be made lower than the pressure in the four-way valve first flow path 32, the four-way valve first flow path 32 and the four-way valve second flow path 33. The sealing performance can be improved.

  Thereby, the leakage of the refrigerant | coolant from the 1st flow path 32 in a four-way valve to the 2nd flow path 33 in a four-way valve can be prevented, the fall of the refrigerant | coolant circulation amount which flows through the outdoor heat exchanger 8 can be prevented, and cooling capacity Can be prevented.

  Next, when heating the hot / cold switching chamber 1, the four-way valve 25 is switched to connect the compressor discharge pipe 18 and the switching chamber condenser inlet pipe 19, and the resistor outlet pipe 20 and the outdoor heat exchanger inlet The pipe 26 is communicated. Further, the expansion valve A10 and the on-off valve D35 are closed, and the space between the compressor suction pipe 23 and the switching chamber condenser outlet pipe 22 is closed.

  In this state, the refrigerant discharged from the compressor 9 is partially condensed in the switching chamber condenser 5 and again condensed in the outdoor heat exchanger 8, and then decompressed by the expansion valve B11 and the expansion valve C12, respectively. , To the evaporator 6 and the second evaporator 7. Then, the refrigerant evaporated in the evaporator 6 and the second evaporator 7 circulates to the compressor 9.

  At this time, the storage chamber that has reached a predetermined temperature in the cold dedicated chamber 2 and the second cold dedicated chamber 3 closes the expansion valve B11 and the expansion valve C12 to stop the supply of the refrigerant. Further, when the temperature of the hot / cold switching chamber 1 reaches a predetermined temperature, the four-way valve 25 is switched so that the compressor discharge pipe 18 and the outdoor heat exchanger inlet pipe 26 communicate with each other, and the switching chamber condenser inlet The pipe 19 and the resistor outlet pipe 20 are communicated. And the on-off valve D35 is opened, and the compressor suction piping 23 and the switching chamber condenser outlet piping 22 are connected. Further, when all the storage rooms reach a predetermined temperature, the operation of the compressor 9 is stopped.

  At this time, the refrigerant that has passed through the switching chamber condenser 5 from the first flow path 32 in the four-way valve is configured to flow into the second flow path 33 in the four-way valve after being reduced in pressure by the resistor 13 by at least 0.01 MPa. ing. For this reason, the pressure in the four-way valve second flow path 33 can be made lower than the pressure in the four-way valve first flow path 32, and the four-way valve first flow path 32 and the four-way valve second flow path 33. The sealing performance can be improved.

  Thereby, the leakage of the refrigerant | coolant from the 1st flow path 32 in a four-way valve to the 2nd flow path 33 in a four-way valve can be prevented, and the fall of the refrigerant | coolant circulation amount which flows through the switching chamber condenser 5 and the outdoor heat exchanger 8 is prevented. It is possible to prevent a decrease in cooling and heating ability.

  Therefore, while reducing the cost of the system and increasing the safety when using a flammable refrigerant, preventing the decline in cooling and heating capacity, it is cheap, highly safe, and has high cooling and heating capacity. Can be a vending machine.

  In the present embodiment, the switching chamber condenser inlet pipe 19 and the first outlet pipe 29 are connected to the outdoor heat exchanger inlet pipe 26 and the second outlet pipe 30, but the switching chamber condenser inlet The same effect can be obtained by connecting the pipe 19 and the second outlet pipe 30 to the outdoor heat exchanger inlet pipe 26 and the first outlet pipe 29.

(Embodiment 3)
FIG. 4 is a perspective view of a switching chamber heat exchanger and a switching chamber fan of the vending machine according to Embodiment 3 of the present invention. FIG. 5 is a longitudinal sectional view of a hot / cold switching chamber, which is a vending machine having the configuration of FIG. In addition, about the same structure as Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 5, in the vending machine 100, an outer door 102 is attached to a front opening of a main body 101 so as to be openable and closable, and a product takeout 103 is configured at the lower part of the outer door 102. Inside the main body 101 is a storage portion 104 for storing products, and below the storage portion 104 is a chute portion 105 that drops the products in the storage portion 104 by the unloading means 120 and transports them to the product outlet 103 from the rear of the main body 101 to the front. It is inclined to the front.

  In addition, a machine room 106 that houses the compressor 9 and the outdoor heat exchanger 8 is configured at the lower part of the main body 101, and is partitioned vertically by a product storage unit 104 and a heat insulating wall 107.

  FIG. 5 is a longitudinal sectional view of the hot / cold switching chamber 1 as described above. The configuration of the cooling chamber will be described below. The hot / cold switching chamber 1 is cooled or heated above the heat insulating wall 107. A cooling chamber 108 is configured, and the storage unit 104 and the cooling chamber 108 are vertically partitioned by the chute unit 105.

  The cooling chamber 108 is provided with a switching chamber fan 36 that stirs air in the hot / cold switching chamber 1, and a fin tube that acts as an evaporator on the upstream side of the flow of air in the switching chamber fan 36. A spiral heat exchanger 38 acting as a condenser is installed between the switching chamber fan 36 and the fin tube heat exchanger 37 as the heat exchanger 37. In the embodiment, the switching chamber fan 36, the spiral heat exchanger 38 that functions as a condenser, and the finned tube heat exchanger 37 that functions as an evaporator are arranged in this order from the front to the rear of the main body 101.

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

  The switching chamber fan 36 uses a small fan in order to secure more space in the cabinet, and is smaller in both width and height than the fin tube heat exchanger 37.

  Further, although the wind on the suction side of the switching chamber fan 36 has a degree of freedom in the longitudinal direction of the fins, the wind direction is regulated in the longitudinal direction of the pipe, so that the wind on the suction side of the switching chamber fan 36 becomes the fin tube heat exchanger. A suction chamber formed as a space portion is provided so as to flow through the entire space 37, and the distance from the fin tube heat exchanger 37 is separated to some extent.

  A spiral heat exchanger 38 is installed in the suction chamber between the switching chamber fan 36 and the fin tube heat exchanger 37. The fin portion of the spiral heat exchanger 38 is spirally wound in the longitudinal direction. In addition, since the gap is formed in the longitudinal direction of the pipe due to the structure of the spiral heat exchanger 38, the wind on the suction side of the switching chamber fan 37 is not restricted by the fins and is spiral. As shown by the arrows in FIG. 4, air can be convected from the entire heat exchanger 38 and the heat exchange efficiency can be improved.

  Thereby, even if the spiral heat exchanger 38 is installed in the suction chamber between the switching chamber fan 36 and the fin tube heat exchanger 37, the switching chamber fan 36 is provided in the entire fin tube heat exchanger 37 and the spiral heat exchanger 38. Therefore, the switching chamber fan 36 and the switching chamber fan 36 are taller than the switching chamber fan 36 from the front of the main body 101 along the inclined arrangement of the chute 105 in the hot / cold switching chamber 1. Since the spiral heat exchanger 38 and the fin tube heat exchanger 37 larger in the height direction and the width direction than the spiral heat exchanger 38 can be arranged side by side in the front-rear direction, the space between the chute 105 and the heat exchanger can be placed. The ineffective space can be reduced, and two heat exchangers are arranged in a state where the ceiling surface is along the cooling chamber 108 formed by the chute portion 105 in an inclined structure. It is possible to suppress the reduction in the internal volume because it.

  Therefore, a vending machine with high product storage efficiency can be obtained.

  In this embodiment, the fin tube heat exchanger 37 is used as an evaporator and the spiral heat exchanger 38 is used as a condenser. However, the fin tube heat exchanger 37 is used as a condenser and the spiral is used. A similar effect can be obtained even when the heat exchanger 38 is operated as an evaporator.

  In addition, the fin tube heat exchanger 37 is installed on the upstream side with respect to the wind flow of the switching chamber fan 36, but the fin tube heat exchanger 37 is on the downstream side with respect to the wind flow of the switching chamber fan 36. The same effect can be obtained by installing the finned tube heat exchanger 38 in the suction chamber.

  As described above, the vending machine according to the present invention can be configured with fewer switching valves for cooling and heating the hot / cold switching chamber, and can improve the heat exchange efficiency of the switching chamber heat exchanger. Applicable to all devices that switch between cooling and heating in one storage room.

Refrigerant circuit diagram of vending machine according to Embodiment 1 of the present invention Refrigerant circuit diagram of vending machine according to Embodiment 2 of the present invention Sectional drawing of the four-way valve of the vending machine by Embodiment 2 of this invention The perspective view of the switching room heat exchanger of the vending machine by Embodiment 3 of this invention Longitudinal sectional view of the hot / cold switching chamber of the present invention Refrigerant circuit diagram of a conventional vending machine Mollier diagram of conventional vending machine refrigerant

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot / cold switching room 2 Cold exclusive room 3 Second cold exclusive room 6 Evaporator 7 Second evaporator 8 Outdoor heat exchanger 9 Compressor 13 Resistor 17 First switching valve 18 Compressor discharge piping 19 Switching room Condenser inlet piping 20 Resistor outlet piping 21 Second switching valve 22 Switching chamber condenser outlet piping 23 Compressor suction piping 24 Resistor inlet piping 25 Four-way valve 27 First inlet piping 28 Second inlet piping 29 First outlet piping 30 Second outlet pipe 31 Four-way valve flow path 32 Four-way valve first flow path 33 Four-way valve second flow path 35 On-off valve D
36 Switching room fan 37 Finned tube heat exchanger 38 Spiral heat exchanger

Claims (3)

  In a vending machine having a plurality of product storages, wherein at least one room in the product storage is a cold dedicated room, and at least one room in the product storage is a hot / cold switching room, a compressor; A switching chamber evaporator and a switching chamber condenser installed in the hot / cold switching chamber, an evaporator installed in the cold chamber, an outdoor condenser installed outside the product storage, and the switching chamber A resistor that is installed in a pipe connecting the condenser and the outdoor condenser, and that decompresses when the refrigerant passes; an outlet pipe of the compressor; an inlet pipe of the switching chamber condenser; and an inlet pipe of the outdoor condenser. A first switching valve to be connected, a second switching valve for connecting the outlet piping of the switching chamber condenser, the inlet piping of a resistor, and the switching chamber evaporator, and cooling the hot / cold switching chamber In the switching room The second switching valve is opened so that the outlet pipe of the compressor and the switching chamber evaporator communicate with each other, and the refrigerant discharged from the compressor is condensed by the outdoor condenser via the first switching valve. Thereafter, when supplying the switching chamber evaporator and the evaporator and heating the hot / cold switching chamber, the second piping is connected to the outlet pipe of the switching chamber condenser and the resistor. The switching valve is opened, and the refrigerant discharged from the compressor is partially condensed by the switching chamber condenser via the first switching valve, and then supplied to the outdoor condenser through the resistor. A vending machine characterized in that it is condensed again and then flows into the evaporator.   In a vending machine having a plurality of product storages, wherein at least one room in the product storage is a cold dedicated room, and at least one room in the product storage is a hot / cold switching room, a compressor; A switching chamber evaporator and a switching chamber condenser installed in the hot / cold switching chamber, an evaporator installed in the cold chamber, an outdoor condenser installed outside the product storage, and the switching chamber A resistor installed in a pipe connecting the condenser and the outdoor condenser and reducing the pressure when the refrigerant passes, an outlet pipe of the compressor, an outlet pipe of the resistor, an inlet pipe of the switching chamber condenser, and the outdoor When cooling the hot / cold switching chamber, the refrigerant discharged from the compressor is condensed by the outdoor condenser via the four-way valve. Before When supplying the switching chamber evaporator and the evaporator and heating the hot / cold switching chamber, a part of the refrigerant discharged from the compressor is transferred by the switching chamber condenser via a four-way valve. A vending machine characterized in that after condensing, it is supplied to the outdoor condenser through the resistor and a four-way valve, condensed again, and then flowed to the evaporator.   A four-way valve main body constituting a first flow path inside the four-way valve, a first inlet pipe opened inside the four-way valve body, a second inlet pipe, a first outlet pipe, a second outlet pipe, and the four-way By moving within the valve body, the second inlet pipe and the first outlet pipe, or the second inlet pipe and the second outlet pipe are connected to form a second flow path in the four-way valve, and the first flow in the four-way valve. A four-way valve composed of a passage and a four-way valve flow passage configured to partition the passage and the second flow passage in the four-way valve, connecting the first inlet pipe and the outlet pipe of the compressor, and the second inlet pipe 3. The vending machine according to claim 2, wherein a resistor outlet pipe is connected.

Images