JP2006309797A - Vending machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vending machine with improved cooling efficiency in a cold room as well as improved heating efficiency in a hot/cold switching room in the vending machine. <P>SOLUTION: In a machine room 18, a condenser 19 and an outdoor heat exchanger 21 are arranged in front and, at the back of the condenser 19 and the heat exchanger 21, a hot/cold switching room compressor 20, a cold room compressor 8, and an evaporating dish 17 are arranged almost horizontally. While the heat exchange efficiency of the condenser 19 and the outdoor heat exchanger 21 is maintained, the heating efficiency or cooling efficiency of the hot/cold switching room compressor 20 and the cold room compressor 8 can be improved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cooling and heating system that uses a latent heat generated when a refrigerant compressed by a compressor condenses in a vending machine that sells products such as can beverages by heating or cooling. The present invention relates to a system and a vending machine using the system.

  In recent years, demands for reducing power consumption for vending machines have increased, and as a means for reducing power consumption, one using a cooling and heating system using a heat pump has been proposed (see Patent Document 1).

  FIG. 6 is a refrigerant circuit diagram of a conventional vending machine. FIG. 7 is a top view of an essential part of a machine room of a 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. Indoor heat exchanger 4, evaporator 5 installed in the cold-dedicated room 2, second evaporator 6 installed in the second cold-dedicated room 2, outdoor heat exchange installed outside the storage room And a cooling and heating system including a compressor 7 and a compressor 8.

  The expansion valve A9, the expansion valve B10, and the expansion valve C11 reduce the pressure of the refrigerant passing therethrough and have a blocking function. The on-off valve A12, the on-off valve B13, the on-off valve C14, and the on-off valve D15 are respectively It controls the presence or absence of refrigerant flow.

  The cooling fan 16 is driven in conjunction with the cooling and heating system to cool the outdoor heat exchanger 7 and the compressor 8.

  Moreover, as shown in FIG. 7, the evaporating dish 17 which accumulates the dew condensation water in a store | warehouse | chamber and evaporates the dew condensation water by using waste heat, such as a condenser, is arrange | positioned.

  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 A12 and the on-off valve D15 are opened, the on-off valve B13 and the on-off valve C14 are closed, and the compressor 8 and the cooling fan 16 are driven. The refrigerant discharged from the compressor 8 is condensed by the outdoor heat exchanger 7 and then decompressed by the expansion valve A9, the expansion valve B10, and the expansion valve C11, respectively, and the indoor heat exchanger 4, the evaporator 5, and the second To the evaporator 6. Then, the refrigerant evaporated in the indoor heat exchanger 4, the evaporator 5, and the second evaporator 6 is returned to the compressor 8.

  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 expansion valve A9, the expansion valve B10, and the expansion valve C11. Stop supplying the refrigerant. Further, when all the storage rooms reach a predetermined temperature, the operation of the compressor 8 is stopped.

  Next, when the hot / cold switching chamber 1 is heated, the on-off valve A12, the on-off valve D15, and the expansion valve A9 are closed, the on-off valve B13 and the on-off valve C14 are opened, and the compressor 8 and the cooling fan 15 are driven. To do. The refrigerant discharged from the compressor 8 is partially condensed in the indoor heat exchanger 4 and again condensed in the outdoor heat exchanger 7, and then decompressed by the expansion valve B 10 and the expansion valve C 11, respectively. , And supplied to the second evaporator 6. Then, the refrigerant evaporated in the evaporator 5 and the second evaporator 6 is returned to the compressor 8.

  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 8 is stopped.

  As described above, the hot / cold switching chamber 1 can be efficiently heated using the condensed waste heat of the refrigerant generated when the cold dedicated chamber 2 and the second cold dedicated chamber 3 are cooled. As compared with the case where the hot / cold switching chamber 1 is heated using another heating means such as the above, the power consumption can be reduced.

  In general, as shown in FIG. 7, the outdoor heat exchanger 7, the cooling fan 16, and the compressor 8 are sequentially arranged in series, and the cooling fan 16 is arranged to air-cool the outdoor heat exchanger 7 and the compressor 8. ing.

At this time, when the hot / cold switching chamber 1 is cooled, or when heating is stopped and the cold dedicated chamber 2 or the second cold dedicated chamber 3 is cooled, the air flow rate of the cooling fan 16 is set to normal. , Prevent the cooling efficiency of the cooling and heating system from decreasing. On the other hand, when the hot / cold switching chamber 1 is heated, the air volume of the cooling fan 16 is reduced to prevent a decrease in the heating efficiency of the cooling and heating system (see Non-Patent Document 1).
JP 2002-174478 A Proceedings of the 2003 Annual Conference of the Japan Society of Refrigerating and Air Conditioning Engineers, B114

  However, in the above-described conventional configuration, the heating capacity is reduced by the amount that the compressor is cooled when the hot / cold switching chamber is heated. Therefore, the outdoor heat exchanger is air-cooled and the compressor is air-cooled during heating. Do not cool, cool the hot / cold switching chamber, or cool the cold chamber and the second cold chamber without heating the hot / cold switching chamber. ing.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a cooling and heating system capable of preventing a reduction in efficiency during heating and a vending machine using the same.

  In order to solve the above-described conventional problems, the vending machine according to the present invention includes a cold chamber that cools a product by an evaporator provided in the interior of the room, and a product that heats or cools the product by an indoor heat exchanger that is provided in the room. In a vending machine having a hot / cold switching chamber and having a machine room at the bottom, a condenser and an outdoor heat exchanger are arranged in the front of the machine room, and behind the condenser and the outdoor heat exchanger. The compressor for the hot / cold switching chamber, the compressor for the cold chamber, and the evaporating dish are arranged almost side by side, and it is configured so that the cold chamber compressor side is positively forced by the blower fan. It is possible to prevent a decrease in the heating efficiency of the temperature system and a decrease in the cooling efficiency of the cooling system.

  In addition, since the cold chamber compressor is disposed so as to be sandwiched between the hot / cold switching chamber compressor and the evaporating dish, the cold chamber compressor can be efficiently cooled by the wind from the blower fan.

  In the vending machine of the present invention, the cold room compressor, the hot / cold switching room compressor and the evaporating dish are arranged almost side by side in the machine room, and the cold room compressor side is positively forced by the blower fan. Since it comprised so that it might ventilate, while preventing the fall of the heating efficiency of a cooling heating system, the fall of the cooling efficiency of a cooling system can be prevented.

  The invention described in claim 1 has a cold chamber that cools the product by an evaporator provided in the interior of the room and a hot / cold switching chamber that heats or cools the product by an indoor heat exchanger provided in the room. In the vending machine having a machine room at the lower part, a cold chamber compressor and condenser of a cooling cycle connected to the evaporator and a cooling unit connected to the indoor heat exchanger are provided in the machine room. A compressor for the hot / cold switching chamber of the temperature cycle, an outdoor heat exchanger that acts as an evaporator when the room is heated, and a condenser when the room is cooled, and an evaporating dish that accumulates water in the storage chamber and promotes evaporation The condenser and the outdoor heat exchanger are disposed in front of the machine room, and the compressor for the hot / cold switching chamber and the cold chamber are disposed behind the condenser and the outdoor heat exchanger. Compressor and the evaporation The heating and cooling efficiency of the hot / cold switching room compressor and the cold room compressor is improved while maintaining the heat exchange efficiency of the condenser and outdoor heat exchanger. can do.

  The invention described in claim 2 further includes a blower fan disposed between the condenser and the outdoor heat exchanger, the compressor for the cold chamber, and the compressor for the hot / cold switching chamber, in addition to the invention described in claim 1. However, the air blower fan is configured to actively blow the cold chamber compressor side, and the hot / cold switching chamber compressor is not air-cooled, so that the heating efficiency during heating is improved. Since the cold room compressor of the cooling system is air-cooled, the cooling efficiency can be improved.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the cold chamber compressor is disposed so as to be sandwiched between the hot / cold switching chamber compressor and the evaporating dish. Since the wind from the cooling fan is rectified by the evaporating dish and guided to the cold chamber compressor, the cold chamber compressor can be efficiently cooled.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a refrigerant circuit diagram of a cooling and heating system and a vending machine using the same in Embodiment 1 of the present invention.

  FIG. 2 is a three-dimensional view of the main part of the machine room in the same embodiment.

  1 and 2, the vending machine of the present invention includes a storage chamber composed of a hot / cold switching chamber 1, a cold chamber 2, and a second cold chamber 3, and includes a compressor 20 and a hot / cold switching chamber 1. An indoor heat exchanger 4 installed in the storage room, a condenser 19 and an outdoor heat exchanger 21 installed outside the storage room, a four-way switching valve 22 for switching the refrigerant flow path during cooling and heating, and for a hot / cold switching room It has an expansion valve 23 which is an expansion mechanism, has a cooling / heating system 24 dedicated to cooling and heating the hot / cold switching chamber 1, a cold chamber compressor 8 (hereinafter referred to as a compressor 8), a cold The evaporator 5 installed in the chamber 2, the second evaporator 6 installed in the second cold chamber 3, the expansion valve 10 as the cold chamber expansion mechanism, the second expansion valve 11, and the outdoor heat exchange It consists of vessel 21 and cold room 2 The second cold chamber 3 has a cooling system 25 for cooling the exclusive.

  Here, the outdoor heat exchanger 21 is composed of a fin tube heat exchanger, and is connected to the cooling and heating system 24, and functions as an evaporator during heating and as a condenser during cooling. And the condenser 19 is connected with the cooling system 25, and acts as a condenser.

  And the outdoor heat exchanger 21 and the condenser 19 are arrange | positioned in the front side of the unit base 50 of the machine room 18 provided in the vending machine lower part.

  The compressor 20 for the hot / cold switching chamber is installed in the heat insulating cover 30 and includes a comp fan 31, an indoor heat exchanger 4, an evaporator 5, a second evaporator 6, and an outdoor heat exchanger 21. Are provided with independent blower fans 26, 27, 28, and 29, respectively.

  Further, an air passage from the cooling fan 29 to the compressor 8 is formed by disposing the heat insulating cover 30 on one side and the evaporating dish 17 on the other side so as to sandwich the compressor 8 from both sides.

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

  First, when the hot / cold switching chamber 1 is cooled, the refrigerant discharged from the hot / cold switching chamber compressor 20 (hereinafter referred to as the compressor 20) is a four-way switching valve, as shown by the dotted arrows in FIG. The flow path is switched at 22 and supplied to the outdoor heat exchanger 21 to be condensed and liquefied. The temperature of this liquid refrigerant becomes 30-40 degreeC substantially the same as the outdoor heat exchanger 21. FIG. The liquid refrigerant discharged from the outdoor heat exchanger 21 is depressurized by the expansion valve 23 and supplied to the indoor heat exchanger 4 to evaporate, and the gas refrigerant returns to the compressor 20 through the four-way switching valve 22 again. The evaporation temperature of the indoor heat exchanger 4 varies greatly depending on the set temperature of the storage chamber. Generally, when canned beverages or the like are cooled, the set temperature is 5 to 10 ° C, and the evaporation temperature of the indoor heat exchanger 4 is -15 to -5 ° C. In addition, since the compressor 20 is air-cooled by the comp fan 31, the cooling efficiency of the cooling and heating system 24 is suppressed from decreasing.

  When the hot / cold switching chamber 1 is heated, as shown by the solid line arrow in FIG. 1, the refrigerant discharged from the compressor 20 is switched to the indoor heat exchanger 4 by switching the flow path by the four-way switching valve 22. Supplied to condense. The temperature of the liquid refrigerant varies greatly depending on the set temperature of the storage chamber. In general, when a can beverage or the like is heated, the set temperature is 50 to 60 ° C, and the condensation temperature of the indoor heat exchanger 4 is 60 to 80 ° C. Moreover, since the compressor 20 is covered with the heat insulation cover 30 and the compressor fan 31 is not operated, the compressor 20 is not air-cooled and the heating efficiency is improved.

  The liquid refrigerant coming out of the indoor heat exchanger 4 is immediately decompressed by the expansion valve 23 and then supplied to the outdoor heat exchanger 21 to evaporate, and the gas refrigerant passes through the four-way switching valve 22 again to the compressor 20. Reflux. Generally, it is necessary to lower the evaporation temperature of the outdoor heat exchanger 21 when the outside air temperature becomes low. In particular, when the outside air temperature becomes 5 ° C. or less, the evaporation temperature has to be a minus temperature, and the outdoor heat exchanger 21 is attached to the outdoor heat exchanger 21. Frost is generated. Further, when the outside air temperature becomes hot and humid, and the tube surface temperature or fin temperature of the outdoor heat exchanger 21 falls below the dew point temperature, condensation occurs.

  However, in the outdoor heat exchanger 21 of the present embodiment, when the cooling system 25 is operated, the condenser 19 connected in contact with the outdoor heat exchanger 21 acts as a condenser, and the fin temperature of the condenser 19 Becomes hot. Therefore, when the cooling and heating system 24 and the cooling system 25 are operated simultaneously, heat can be exchanged through the fins, and the air heated by the condenser 19 can be sucked into the outdoor heat exchanger 21. The cooling and heating system 24 can be operated at a high evaporation temperature of 0 to 10 ° C. Thereby, the compression ratio can be reduced even under severe heating conditions of a condensation temperature of 60 to 80 ° C., and the efficiency of the compressor 20 can be improved. Moreover, the efficiency of the compressor 8 can be improved by reducing the condensation temperature in the cooling system 25 as well.

  Furthermore, the frost formation of the outdoor heat exchanger 21 can be prevented by setting the evaporation temperature of the cooling and heating system 24 to 0 ° C. or higher. Further, even when the outside air temperature becomes hot and humid, the fin temperature of the outdoor heat exchanger 21 is less likely to fall below the dew point temperature, and the occurrence of condensation can be effectively suppressed.

  Further, when the compressor 20 is cooled at the time of heating, the heating capacity is reduced by that amount. Therefore, at the time of heating, the outdoor heat exchanger 21 is cooled by the cooling fan 29 and the compressor 20 is not cooled by the air. 31 is stopped.

  Further, by disposing the heat insulating cover 30 on one side and the evaporating dish 17 on the other side so that the compressor 8 is sandwiched from both sides, the air from the cooling fan 29 is rectified by the heat insulating cover 30 and the evaporating dish 17 and is compressed. Therefore, the compressor 8 can be efficiently cooled.

  As described above, the present embodiment has a dedicated cooling and heating system 24 for cooling and heating the hot / cold switching chamber 1 separately from the cooling means for the cold chamber 2 and the second cold chamber 3. As the cooling and heating system 24, the compressor 20, the indoor heat exchanger 4, the outdoor heat exchanger 21 configured by a cascade heat exchanger integrated with the condenser of the cooling system 25, a four-way switching valve 22, By providing the expansion valve 23, the cooling and heating system 24 can be operated independently of the cooling of the cold chamber 2, so that the evaporation temperature at the time of heating can be set higher and the cooling can be performed. Using the waste heat of the system 25, it becomes possible to maintain the evaporation temperature when heating the cooling and heating system 24 at a high temperature condition of 0 to 10 ° C., and to reduce the compression ratio. Improvement Thus, the heating efficiency of the cooling and heating system 24 can be improved, and a heating efficiency of about twice that of a heating means having a heating efficiency of about 1 such as an electric heater can be easily realized. Therefore, the power consumption of the vending machine can be greatly reduced.

  In the present embodiment, the compressor 20 is surrounded by the heat insulating cover 30 and air-cooled with the optimum air volume by the dedicated compressor fan 31 to enable efficient cooling and heating operation.

  Further, by disposing the heat insulating cover 30 on one side and the evaporating dish 17 on the other side so that the compressor 8 is sandwiched from both sides, the air from the cooling fan 29 is rectified by the heat insulating cover 30 and the evaporating dish 17 and is compressed. Therefore, the compressor 8 can be efficiently cooled.

(Embodiment 2)
FIG. 3 is a three-dimensional view of the heat insulation cover of the cooling and heating system and the vending machine using the same in Embodiment 2 of the present invention. In addition, about the same structure as Embodiment 1, it attaches the same code | symbol and abbreviate | omits detailed description.

  FIG. 4 is a top view of the main part of the machine room in the same embodiment.

  FIG. 5 is a side view of the three-way valve in the same embodiment.

  3 to 5, the heat insulating cover 30 is configured to be divided into a front wall member 32 and a rear main body 33. In addition, a charge pipe A34 provided on the suction side of the compressor 8 and a charge pipe B35 provided on the discharge side piping path of the compressor 8 are for enclosing or discharging the refrigerant at the time of service such as failure. Similarly, a charge pipe C36 is provided on the suction side of the compressor 20, and a charge pipe D37 is provided on the discharge side of the compressor 20.

  Further, a three-way valve 39 is disposed between the compressor 8 and the compressor 20. The pipe A40, pipe B41, and pipe C42 of the three-way valve 39 are routed upward.

  Further, the compressor 8 is a constant speed compressor driven by an induction motor (not shown), and the compressor 20 is a variable speed compressor driven by a DC motor (not shown), so that the drive rotational speed of the compressor can be varied. I am doing so.

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

  The compressor 20 is a variable speed compressor that is driven by a DC motor (not shown), and is operated while avoiding rotation speeds near 50 Hz and 60 Hz, which are the frequencies of the commercial power supply. Therefore, the compressor 20 is driven by an induction motor (not shown). The compressor 8 can be operated at a different rotational speed and the two compressors can be prevented from resonating at the same rotational speed.

  Also, pipe A40, pipe B41, and pipe C42 of three-way valve 39 are routed upward, pipe A40 is connected to the high pressure side of compressor 8, and pipe B41 and pipe C42 are connected to expansion valve 10 and expansion valve 11. Therefore, the pipe connection can be made without being obstructed by other pipes, and the installation work of the three-way valve 39 is facilitated when repairing.

  Further, when the vending machine is discarded, first, the refrigerant in the system is discharged into the atmosphere from the charge pipe C36 provided on the suction side of the compressor 20 and the charge pipe D37 provided on the discharge side of the compressor 20. Then, from the back of the vending machine, the main body 33 of the heat insulating cover 30 is pulled up backwards and removed. By doing so, the wall member of the heat insulation cover 30 is left, and the whole compressor 20 is exposed. And the charge pipe C36, the discharge pipe 43, and the suction pipe 44 of the compressor 20 are cut | disconnected, the compressor 20 is removed, and a vending machine main body is crushed. At this time, in order to facilitate workability, the three-way valve 39 may be removed.

  As described above, in the present embodiment, the heat insulating cover of the compressor 20 is configured to be divided into the front wall member 32 and the rear main body 33, and after the vending machine, By removing the main body 33, the entire compressor 20 can be exposed, and at the time of disposal, the discharge pipe 43 and the suction pipe 44 of the compressor 20 can be cut and the compressor 20 can be removed.

  In the present embodiment, since the refrigerant in the system is discharged into the atmosphere from the charge pipe C36 provided on the suction side of the compressor 20 and the charge pipe D37 provided on the discharge side of the compressor 20, It is possible to discharge the refrigerant from both, and to prevent the refrigerant from remaining in a part of the system.

  Further, in the present embodiment, the pipe of the three-way valve 39 is routed upward and connected to the pipe above the three-way valve 39, and the three-way valve 39 is connected to the pipe without being obstructed by other pipes. Therefore, the installation work of the three-way valve 39 is facilitated, and the number of work steps can be reduced and rationalized.

  Further, in the present embodiment, by making the compressor 20 variable, the compressor 20 and the compressor 8 are resonated by avoiding the rotational speed of the compressor 20 being the same as the rotational speed of the compressor 8. Thus, increase in noise vibration can be prevented.

  Although not shown, as a means for identifying the piping circuit of the compressor 8 for the cold chamber in the machine room and the piping circuit of the compressor 20 for the hot / cold switching chamber, for example, a condenser 19 connected to the compressor 8 By coloring the piping circuit of one of the outdoor heat exchangers connected to the compressor 20, the operator can easily recognize the piping circuit of the machine room at the time of service such as failure of the vending machine. This makes it possible to carry out repair work and the like quickly and improve the efficiency of service operations.

  As described above, the cooling and heating system and the vending machine using the cooling and heating system according to the present invention can improve the heating efficiency by using the waste heat of the cooling system for heating the cooling and heating system. It can also be applied to applications that require energy saving during heating and cooling, such as showcases that store hot drinks and cold drinks, and cup vending machines that supply small amounts of hot water.

Cooling and heating system in Embodiment 1 of the present invention and refrigerant circuit diagram of vending machine using the same Three-dimensional view of main part of machine room in the same embodiment Cooling and heating system in Embodiment 2 of the present invention and heat insulation cover three-dimensional view of vending machine using the same Machine room main part top view in the same embodiment Side view of the three-way valve in the same embodiment Refrigerant circuit diagram of a conventional vending machine Top view of the main part of the machine room of a conventional vending machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot / cold switching room 2 Cold room 4 Indoor heat exchanger 20 Compressor for hot / cold switching room 21 Outdoor heat exchanger 23 Expansion mechanism for hot / cold switching room 24 Cooling and heating system 25 Cooling system 29 Cooling fan 30 Heat insulation Cover 32 Wall member 33 Body 34 Charge pipe A
35 Charge Pipe B
36 Charge Pipe C
37 Charge Pipe D
39 Three-way valve 40 Pipe A
41 Pipe B
42 Pipe C

Claims (3)

  It has a cold chamber that cools the product by an evaporator provided in the upper part and a hot / cold switching room that heats or cools the product by an indoor heat exchanger provided in the room, and a machine room at the lower part. In the vending machine, a compressor and condenser for a cold cycle of a cooling cycle connected to the evaporator and a hot / cold switching chamber of a cooling and heating cycle connected to the indoor heat exchanger are provided in the machine room. The compressor and the room are equipped with an outdoor heat exchanger that acts as an evaporator when heated, and as a condenser when cooled, and an evaporating dish that accumulates water in the storage room and promotes evaporation, The condenser and the outdoor heat exchanger are disposed at the rear of the condenser and the outdoor heat exchanger, and the hot / cold switching chamber compressor, the cold chamber compressor, and the evaporating dish are disposed behind the condenser and the outdoor heat exchanger. Almost side by side Vending machine, characterized in that.   A blower fan is arranged between the condenser and the outdoor heat exchanger, the cold room compressor and the hot / cold switching room compressor, and the blower fan positively and actively blows air to the cold room compressor side. The vending machine according to claim 1, wherein the vending machine is configured as described above.   The vending machine according to claim 1 or 2, wherein the cold chamber compressor is disposed so as to be sandwiched between the hot / cold switching chamber compressor and the evaporating dish.

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