JP2006011604A - Cooling and heating device for vending machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device for a vending machine which has low-cost refrigerant circuit configuration, reduces exhaust heat to the outside air as far as possible, and consumes low electric power, in the vending machine which uses a heat pump type refrigerant circuit to perform energy-saving operation. <P>SOLUTION: Each of a plurality of commodity storage chambers is set in a heating mode or a cooling mode, an internal heat exchanger of a commodity storage chamber set in an operation mode for heating in the case of an operation mode wherein cooling operation and heating operation are simultaneously performed is used as a condenser, one commodity storage chamber is designated as a priority chamber, and on the basis of a signal of a temperature detection means installed in the priority chamber, cooling and heating operation is performed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cooling and heating device for a vending machine that cools and heats a product such as a beverage in a container such as a can, a bottle, a pack, or a plastic bottle for sale.

Conventionally, as a cooling and heating control device for this type of vending machine, an internal heat exchanger for cooling or heating the product installed in each of a plurality of product storage rooms for storing products to be sold, and product storage A compressor installed outside the compressor for compressing the refrigerant in the refrigeration cycle, an external heat exchanger for discharging unnecessary heat generated in the refrigeration cycle, a distributor for diverting the refrigerant to the internal heat exchanger, and An electronic expansion valve that is connected downstream of the distributor and decompresses the refrigerant that has been compressed by the compressor to a high pressure, and the internal heat exchanger, the compressor, the external heat exchanger, and the electronic expansion valve in series and parallel Solenoid valves that change the direction of the refrigerant flowing in the internal heat exchanger by opening and closing the connected refrigerant flow path, and the cold heat generated by each of the internal heat exchangers to transmit to the product, respectively A fan that generates a circulating air for circulating the air in the product storage room, and a temperature signal in the product storage room that is necessary to open and close the solenoid valve and to operate / stop the compressor in response to the temperature of the product. There is known a heat pump type cooling and heating device that includes a temperature sensor for output and that heats the product storage chamber by operating the internal heat exchanger as an evaporator or cooling as a condenser by opening and closing the electromagnetic valve. Yes. (For example, Patent Document 1)
This heat pump cooling and heating device uses the amount of heat that has been exhausted by the external heat exchanger to heat the product storage room of the internal heat exchanger. Can be reduced.
JP 2001-84447 A

  However, in the cooling and heating operation mode in which the cooling and heating are simultaneously performed, the operation must be stopped when the inside temperature of one of the cold product storage chambers reaches a predetermined temperature range. If the operation is continued, there is a problem that the temperature inside the other chamber becomes an excessive temperature. For this purpose, the internal and external heat exchangers are connected in series and electronic expansion valves are arranged in the respective internal and external heat exchangers so that all the product storage rooms have an appropriate temperature range. A method of controlling the flow rate of the refrigerant flowing in the tank is used, but this method requires a large number of electronic expansion valves and is a costly control method.

  The present invention has been made in view of the above points, and aims to provide a cooling device for a vending machine with low power consumption by reducing exhaust heat to the outside as much as possible with a low-cost refrigerant circuit configuration. To do.

In order to achieve the above object, a vending machine according to claim 1 of the present invention provides:
An internal heat exchanger that is installed in each of a plurality of product storage rooms for storing products to be sold and that cools or heats the product by evaporating or condensing the refrigerant to generate cold, and a refrigerant internal heat exchanger An external heat exchanger that discharges heat to the outside, a compressor that is piped to these heat exchangers and that compresses and compresses the refrigerant that has been evaporated and reduced in pressure by the internal heat exchanger or the external heat exchanger, An electronic expansion valve that depressurizes the refrigerant that has become high pressure, a plurality of electromagnetic valves that switch the direction of the flow of the refrigerant to the internal heat exchanger, and each product storage chamber that detects the temperature in the product storage chamber. A vending machine cooling and heating device comprising temperature detection means and control means for receiving the detection signals from these temperature detection means to control the opening / closing of the solenoid valve and the operation / stop of the compressor,
A plurality of product storage chambers are set to heating or cooling mode, and the internal heat exchanger of the product storage chamber set to the heating operation mode in the operation mode in which cooling and heating operations are performed simultaneously is used as a condenser. One of the product storage rooms is designated as a priority room, and a cooling and heating operation is performed based on a signal from a temperature detecting means installed in the priority room.

Moreover, the vending machine according to claim 2 of the present invention is the above-mentioned claim 1,
When the heating or cooling operation of the priority room is suspended, the heating or cooling operation of the non-priority room is performed based on a signal from a temperature detection unit installed in the non-priority room.

Moreover, in the vending machine according to claim 3 of the present invention, in either of the above claims 1 or 2,
Based on the signal from the temperature detection means installed in the non-priority room, the priority room and non-priority room are in the period until the heating or cooling of the priority room is in operation and the heating or cooling operation of the priority room is stopped. The vending machine according to claim 4 of the present invention is characterized in that in any one of the above claims 1 to 3,
When a limit temperature range is set for a non-priority room, and the internal temperature of the non-priority room reaches the limit temperature range, the priority room is determined based on the signal from the temperature detection means installed in the non-priority room. In addition, the heating or cooling operation of the non-priority chamber is performed.

According to the cooling and heating device of the vending machine according to claim 1 of the present invention,
In the case of the operation mode in which cooling and heating are performed simultaneously, one product storage room is preferentially designated as either heating operation or cooling operation, and based on the signal of the temperature detection means installed in the priority product storage room, Since heating and cooling operations are performed, heating and cooling operations are always performed using only the internal heat exchanger, eliminating the need to use an external heat exchanger, eliminating the need for exhaust heat to the outside air and heat pump operation Since all the heat energy generated in step 1 is used for cooling and heating the product storage, power consumption can be greatly reduced.

According to the cooling and heating device of the vending machine according to claims 2 to 4 of the present invention,
In the operation mode in which cooling and heating are performed simultaneously, priority is given to either the heating operation or the cooling operation for one product storage room, and cooling is performed based on the signal from the temperature detection means installed in the priority product storage room. A heating operation is performed, the inside temperature of the non-priority room is detected, and the operation mode is appropriately changed when the temperature of the non-priority room is outside the appropriate temperature range. For this reason, in many operating hours, the heat energy generated by the heat pump operation is used for cooling and heating the product storage, so that power consumption can be suitably reduced, and it is appropriate for all product storage rooms. It can be maintained in the temperature range.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.

  (Embodiment 1) FIGS. 1 to 5 show a vending machine according to a first aspect of the present invention. 1 is a front view of a vending machine, FIG. 2 is a cross-sectional view of the vending machine, FIG. 3 is a refrigerant circuit, FIG. 4 is a control block diagram, FIG. 5 is a flowchart of the main part of cooling control, and FIG. FIG. 7 shows an example of an operation time chart.

  1 and 2, reference numeral 1 denotes a main body cabinet of a vending machine that becomes a heat-insulating housing, 2 denotes a partition wall that partitions and forms a product storage chamber 3 at the top of the main body cabinet into three product storage chambers 3A to 3C. The product stored in the product storage rack 5 suspended in the product storage chamber 3 is shown. The product storage chamber 3A is dedicated to cooling, and the product storage chambers 3B and 3C are product storage chambers for both cooling and heating. Reference numerals 6 to 13 denote components of the cooling unit disposed on the lower side of the main body cabinet 1, and reference numeral 6 denotes an internal heat exchanger which is arranged one by one corresponding to each of the commodity storage chambers 3A to 3C. 6C, 7 is an external heat exchanger, 8 is a compressor, 9 is an accumulator for storing unevaporated liquid refrigerant, 10 is an electronic expansion valve, and each component is connected by a refrigerant pipe 11. Reference numeral 12 denotes an internal heat exchanger fan that blows cold heat from the internal heat exchanger 6 to the product storage chamber 3, reference numeral 13 denotes an external heat exchanger fan that exhausts heat from the external heat exchanger 7, and reference numeral 14 denotes a product. A heater 15 for heating the product in the storage chamber 3 and an internal temperature sensor 15 for detecting the temperature in the product storage chamber 3 are shown. Reference numeral 16 denotes a circulation duct for returning the air that has cooled / heated the product in the product storage chamber 3 to the internal heat exchanger / heater, and 17 is a rolling conveyance of the sold product to a product sales port 19 installed below the outer door 18. A large number of holes are drilled to send the cool air discharged from the internal heat exchanger 6 to the product. Reference numeral 20 denotes an inner door that is made of a heat insulating material and prevents heat from flowing in and out of the product storage chamber 3.

  FIG. 3 is a cooling circuit diagram shown together with the control circuit of the cooling device of the vending machine corresponding to FIGS. In FIG. 3, reference numerals 30 to 34 denote electromagnetic valves. The electromagnetic valve 30 opens and closes between the outlet of the compressor 8 and the external heat exchanger 7, and the electromagnetic valves 31A to 31C open and close between the electronic expansion valve 10 and the internal heat exchangers 6A to 6C. The electromagnetic valves 32A and 32B open and close between the compressor 8 and the internal heat exchangers 6B to 6C. The reason why the solenoid valve is not provided between the compressor 8 and each internal heat exchanger 6A is that the product storage chamber 3A is exclusively for cooling, and the internal heat exchanger 6A does not act as a condenser. It depends. When the product storage chamber 3A is operated for cooling and heating, an electromagnetic valve is disposed between the compressor 8 and each internal heat exchanger 6A. The electromagnetic valves 33B and 33C are electromagnetic valves that open and close a bypass circuit connected from the compressor 8 to the internal heat exchangers 6B to 6C. The electromagnetic valve 34 is connected to the external heat exchanger 7 and the compressor 8 inlet side. It is a solenoid valve that opens and closes the bypass circuit.

  Reference numeral 35 denotes a pipe between the compressor 8 and the electronic expansion valve 10, a pipe between the electromagnetic valves 31B and 31C and the internal heat exchangers 6B and 6C, and an electronic expansion valve 10 and the internal heat exchangers 6B and 6C, respectively. This is a check valve that is interposed in the bypass circuit to the compressor and the bypass circuit to the compressor 8 and the electronic expansion valve 10 and that allows the refrigerant to pass only in the direction of the arrow shown in the figure.

  For example, in the operation mode (referred to as CCC operation) for cooling all the product storage chambers 3A to 3C, the solenoid valves 33B, 33C, 34 are closed and the other solenoid valves are opened, thereby showing the bold lines in the figure. The refrigerant flows through the circuit in the direction of the arrow, and the refrigerant compressed by the compressor 8 is condensed into a liquid by the external heat exchanger 7 and expanded by the electronic expansion valve 10 to be decompressed to form a low-temperature gas-liquid two-phase flow. While being distributed to each of the internal heat exchangers 6A to 6C and cooling the inside of the product storage chambers 3A to 3C, the vaporized refrigerant returns to the compressor 8 via the accumulator 9 to perform a cycle operation to cool the product storage chamber.

  In FIG. 4, reference numeral 100 denotes a control device for controlling the cooling and heating operation by a microcomputer, which opens and closes the electromagnetic valves 30 to 34 and operates / stops the compressor 8 in response to temperature signals from the temperature sensors 15A to 15C. Output a signal. Reference numeral 110 denotes an operation mode selection switch (hereinafter, the switch is referred to as SW) for setting the cooling or heating operation of each of the product storage chambers 3A to 3C in the control device 100. Reference numeral 111 denotes a priority room selection SW for setting one of the three product storage rooms 3A to 3C as a priority room to be controlled.

  Inside the control device 100, a main control unit 120, determination units 101 to 104 and a memory 105 are incorporated. 101 is an operation state determination unit that determines the operation state of the compressor 8, 102 is an operation mode determination unit that determines an operation mode specified by the operation mode selection SW 110, and 103 is a priority room specified by the priority room selection SW 111. A priority room determination unit 104 is an operation command unit that commands operation and stop of the compressor 8 and opening and closing of the solenoid valves 30 to 34.

  Reference numeral 105 denotes a memory of temperatures set in order to control heating and cooling operations in comparison with the inside temperature, and heating setting OFF temperature, heating setting ON temperature, cooling setting OFF temperature, cooling setting ON temperature, cooling The forced OFF temperature, the forced cooling ON temperature, the forced heating OFF temperature, the forced heating ON temperature, and the like are stored. The heating setting OFF temperature indicates the upper limit of the temperature of the inside air to be heated, and is a temperature at which the heating operation is stopped when reaching this temperature, and is set to 60 ° C., for example. The heating set ON temperature is a set temperature for starting the heating operation again when the inside temperature drops after the heating operation is stopped, and is set to 50 ° C., for example. The cooling setting OFF temperature and the cooling setting ON temperature are temperatures related to cooling stop and start related to the cooling operation control, and are set to 4 ° C. and 8 ° C., for example. The forced cooling OFF temperature is a set temperature for preventing excessive cooling, and is a lower limit temperature at which the cooling operation is always stopped when the temperature is lower than this temperature, and is set to 0 ° C., for example. Further, the cooling forced ON temperature is an upper limit set temperature for guaranteeing a minimum cooling temperature, and is a temperature at which the cooling operation is always started when the temperature becomes equal to or higher than this temperature, and is set to 12 ° C., for example. Similarly, the forced heating OFF temperature and the forced heating ON temperature are set to 60 ° C. and 50 ° C., for example. This range of forced ON / OFF temperatures for cooling and heating is called the limit temperature range.

  In such a configuration, the control operation of the cooling and heating operation will be described with reference to the flowchart of FIG. In order to make the explanation easy to understand, in a vending machine having three product storage rooms, a cooling and heating CCH operation mode (CCH) in which two rooms (3A, 3B) are cooled and one room (3C) is heated. The case where the priority chamber is set to the heating chamber (3C) will be described. In addition, it becomes a flowchart of control operation | movement of the cooling heating operation similarly comprised also in the case of other cooling heating operation modes.

  The compressor 8 starts operation by the operation mode (CCH) selected by the operation mode selection SW 110 when the power of the vending machine is turned on. Specifically, in FIG. 6, the electromagnetic valves 31A, 31B, 32B, and 33C are opened, and the other electromagnetic valves are closed. In this embodiment, the refrigerant discharged from the compressor 8 flows in the direction of the arrow in the figure, the internal heat exchanger 6C acts as a condenser to heat the product storage chamber 3C, and the internal heat exchanger 6A, 6B operates as an evaporator to operate in an operation mode in which the product storage chambers 3A and 3B are cooled.

  In the flowchart of FIG. 5, the temperature inside the chamber designated as the priority room is read (S1), the operation status of the compressor 8 is confirmed (S2), and if it is in operation (S2 branch Y), the temperature of the priority room is It is determined whether it is below the heating setting OFF temperature (S3). If the temperature of the priority room is equal to or lower than the heating set OFF temperature (S2 branch N), the cooling and heating operation (CCH) of the three rooms is continued (S4) and the process returns. If the temperature of the priority chamber exceeds the heating setting OFF temperature in the determination in step S3 (S3 branch Y), the operation of the compressor 8 is stopped (S5) and the operation returns to the original. When the operation of the compressor 8 stops, the process proceeds to step S21 based on the determination in step S2 (S2 branch N). If the temperature of the priority chamber is equal to or lower than the heating set ON temperature (S21 branch N), the process returns to the original. Eventually, when the temperature of the priority chamber decreases and becomes equal to or lower than the heating set ON temperature, the operation of the compressor 8 is started again (S22), and the operation returns to the first operation.

Next, an example to which the control method of the present invention is applied is shown in the time chart of FIG. In the figure, at time _t 1 ~t _2, implementing the CCH operation in the manner of the refrigerant circuit shown in FIG. Temperature 15C priority compartment will pause the operation of the compressor 8 and reaches the heat setting OFF temperature at time t _2. Then, the internal temperature of the product storage chamber 3C of the heating chamber gradually decreases, while the internal temperature of the product storage chambers 3A and 3B of the cooling chamber gradually increases. While detecting the temperature of the preferential compartment, at time t _3, when the temperature of the interior temperature sensor 15C reaches the heat setting ON temperature, restart the compressor 8 implementing cooled again heated at CCH operation. Hereinafter, similarly at time t _4, when the temperature of the interior temperature sensor 15C reaches the heat setting OFF temperature, it pauses compressor 8. Resume operation and temperature of the priority compartment is a reduction to the heating setting ON temperature at time t _5. In the meantime, even if the internal temperature of the non-priority chamber exceeds the cooling setting ON temperature, the cooling heating operation control is performed with priority given to the temperature condition of the priority chamber.

If this cooling and heating control operation is performed, the cooling and heating operation is always carried out by the internal heat exchanger, so that there is no waste heat to the outside, and a suitable energy saving operation can be achieved.
(Embodiment 2) FIG. 8 is a flow chart showing the main part of the cooling control showing the vending machine according to the second aspect of the present invention. The difference from the first embodiment is that the cooling operation of the non-priority room is operated according to the state of the temperature of the non-priority room when the heating operation is stopped when the temperature of the priority room exceeds the heating setting OFF temperature. The point is to control the mode. Others are the same as those of the first embodiment, and those having the same configuration are denoted by the same reference numerals and description thereof is omitted.

  With this configuration, the cooling control operation of the present invention according to claim 2 will be described with reference to the flowchart of FIG.

  The main part of Embodiment 1 shown in FIG. 5 is read until the temperature in the chamber designated as the priority room is read in S1 and whether or not the temperature in the chamber in the priority room exceeds the heating setting OFF temperature in S3. It is the same as the flowchart. When the heating set OFF temperature is exceeded (S3 branch Y), the internal temperature 15A, 15B of the non-priority room is read (S6). In the determination of the operation mode of the non-priority room (S50), if the temperatures of the two non-priority rooms are both equal to or higher than the cooling set OFF temperature (S50 branch 1), the two rooms operating in the refrigerant circuit mode shown in FIG. Switch to the cooling operation mode (CC) (S51).

  Specifically, in FIG. 9, the electromagnetic valves 30, 31A, 31B, and 32B are opened, and the other electromagnetic valves are closed. According to this aspect, the refrigerant discharged from the compressor 8 flows as indicated by the arrows in the figure, the external heat exchanger 7 acts as a condenser, and the internal heat exchangers 6A and 6B act as evaporators. A two-chamber cooling operation mode (CC) for cooling the product storage chambers 3A and 3B is set.

  Further, when the temperature of any one of the non-priority rooms has reached the cooling set OFF temperature with respect to the determination of the non-priority room operation mode in step S50 (S50 branch 2), the mode of the electromagnetic valve shown in FIG. In step S52, the solenoid valve connected to the product storage chamber that has reached the cooling set OFF temperature is further closed to switch to the one-chamber cooling operation mode (C).

  If the temperature of one of the remaining non-priority rooms has reached the cooling set OFF temperature in response to the determination of the non-priority room operation mode in step S50 (S50 branch 3), the operation of the compressor 8 is suspended. Then, the cooling and heating operation is stopped (S5).

Next, an example to which the control method of the present invention is applied is shown in the time chart of FIG. In the figure, t ₂ from time t ₁ is carried out the CCH operation in the manner of the refrigerant circuit shown in FIG. When the temperature 15C priority chamber reaches the heating OFF temperature at time t _2, the paused the heating operation is changed to CC operation in the manner of the refrigerant circuit shown in FIG. Further, while continuing the cooling operation to detect the temperature of the non-priority room, at time t _3, when the temperature of the interior temperature sensor 15A reaches the cooling set OFF temperature, connected to the internal heat exchanger 6A about commodity storage chamber 3A The solenoid valve 31A is closed. Next, when the temperature of the inside temperature sensor 15B to reach the cooling set OFF temperature at time t _4, pauses compressor 8. Then, when at time t ₅ the temperature 15C priority compartment is a reduction to the heating setting ON temperature, resume operation, to continue the same control operation described below.

If this cooling and heating control operation is performed, the time for which the outdoor heat exchanger 7 is used is limited to the extremely short time from time t _{2 to} t ₄ as shown in the time chart of FIG. As a result of most operating only with the indoor heat exchanger, the exhaust heat to the outside is limited, and a suitable energy-saving operation is achieved. Further, the internal temperature in the non-priority room is also preferably maintained within the set temperature.

  (Embodiment 3) FIG. 11 shows a flowchart of the main part in the vending machine according to the third and fourth aspects of the present invention. The difference from Embodiment 2 is that the operation mode is changed before the chamber temperature in the priority room exceeds the heating setting OFF temperature, that is, during the heating operation of the priority room, depending on the mode of the chamber temperature in the non-priority room. The control temperature range is used, and the control temperature range at the limit temperature setting is used during the cooling and heating operation of the non-priority chamber. Others are the same as those in the second embodiment, and those having the same configuration are denoted by the same reference numerals and description thereof is omitted.

  In FIG. 11, the temperature in the chamber designated as the priority room in S1 is read, and the step in S3 determines whether or not the chamber temperature in the priority room has exceeded the heating setting OFF temperature. It is the same as Embodiment 2 shown. Within the range where the heating setting OFF temperature is not exceeded (S3 branch N), the internal temperature 15A, 15B of the non-priority room is read (S61), and the operation of the priority room non-priority room is determined (S40). In step S40, if the temperatures of the two non-priority chambers are both equal to or higher than the forced cooling OFF temperature (S40 branch 1), the cooling heating operation mode (CCH) is operated in the refrigerant circuit mode shown in FIG. (S4).

  Further, when the temperature of any one of the non-priority rooms has reached the forced cooling OFF temperature for the determination of the priority room non-priority room operation in step S40 (S40 branch 2), it is shown in the refrigerant circuit diagram of FIG. In the open / close mode of the electromagnetic valve, the two-chamber cooling and heating operation mode (CH) is switched by closing the electromagnetic valve related to the product storage chamber that has reached the cooling setting OFF temperature (S41).

  More specifically, in FIG. 12, the electromagnetic valves 33C, 31B, and 32B are opened, and the other electromagnetic valves are closed. According to this aspect, the refrigerant discharged from the compressor 8 flows as shown by the arrows in the figure, the internal heat exchanger 6C acts as a condenser, and the internal heat exchanger 6B acts as an evaporator to store goods. It becomes 2 chamber refrigerant circulation mode (CH) which cools chamber 3B and heats product storage chamber 3C.

  In the determination of the priority room non-priority room operation in step S40, when the temperature of both non-priority rooms has reached the forced cooling OFF temperature (S40 branch 2), the solenoid valve shown in the refrigerant circuit diagram of FIG. In the embodiment, the operation mode is switched to the one-chamber heating operation mode (H) by closing the solenoid valve related to the product storage chamber to be cooled (S42).

  More specifically, in FIG. 13, the electromagnetic valves 33C and 34 are opened, and the other electromagnetic valves are closed. According to this aspect, the refrigerant discharged from the compressor 8 flows as indicated by the arrows in the figure, the internal heat exchanger 6C acts as a condenser, and the external internal heat exchanger 7 acts as an evaporator. Then, the one-room heating mode (H) for heating the product storage chamber C is set.

Next, an example to which the control method of the present invention is applied is shown in the time chart of FIG. In the figure, the time _t 1 ~t ₂ carries out a CCH operation in the manner of the refrigerant circuit shown in FIG. When at time t ₂ is 1 temperature 15A of the non-priority chamber reaches the cooling forced OFF temperature is changed to CH operation shown in FIG. 12 by resting the cooling operation of the commodity storage chamber 3A. Further with continued cooling and heating operation to detect the temperature of the other non-priority room, at time t _3, when the temperature of the interior temperature sensor 15B cools forced OFF temperature reached to suspend cooling operation of the commodity storage chamber 3B To the H operation shown in FIG. Then, when the temperature 15C priority chamber reaches the heating set OFF temperature at time t _4, pause the operation of the compressor 8. When the temperature 15C of the priority chamber reaches the heating setting OFF temperature again, the control operation from the CCH operation is similarly started.

  Note that the cooling ON temperature setting may be set to the cooling forced ON temperature for the determination of the non-priority room operation in step S50. As a result, the cooling operation time is shortened, and a more suitable energy saving operation can be performed.

  Further, in the determination of the priority room non-priority room operation in step S40, when the temperature of both non-priority rooms has reached the forced cooling OFF temperature (S40 branch 3), the cooling forced operation OFF temperature is reached first and the cooling operation is suspended. With reference to the temperature of the product storage room where the inside temperature of the storage is rising, the cooling operation of the product storage room and the cooling / heating operation (CH) of the two rooms which are the heating operation of the priority room may be switched. As a result, exhaust heat by the external heat exchanger is limited, and more preferable energy saving operation can be performed.

  Further, the operation control may be performed by setting the limit temperature range for cooling or heating of the non-priority chamber to be the same as the normal set temperature range. As a result, the beverage product can be held at a more suitable temperature.

  By performing the cooling and heating control operation, the frequency of using the external heat exchanger is further reduced as compared with the second embodiment by expanding the control temperature range of the ON / OFF control operation for the non-priority chamber. Therefore, exhaust heat to the outside is limited, and a suitable energy-saving operation is achieved.

It is a front view of the vending machine which shows Embodiment 1-3 of the vending machine by this invention. It is a cross-sectional view of the vending machine which shows Embodiment 1-3 of the vending machine by this invention. It is a refrigerant circuit which shows Embodiment 1-3 of the vending machine by this invention. It is a control block diagram which shows Embodiment 1 of the vending machine by this invention. It is a flowchart of the principal part of the cooling control which shows Embodiment 1 of the vending machine by this invention. It is the operation example (CHH) of the refrigerant circuit which shows embodiment of the vending machine by this invention. It is an example of the time chart of the cooling control which shows Embodiment 1 of the vending machine by this invention. It is a flowchart of the principal part of the cooling control which shows Embodiment 2 of the vending machine by this invention. It is the operation example (CC) of the refrigerant circuit which shows embodiment of the vending machine by this invention. It is an example of the time chart of the cooling control which shows Embodiment 2 of the vending machine by this invention. It is a flowchart of the principal part of the cooling control which shows Embodiment 3 of the vending machine by this invention. It is the operation example (CH) of the refrigerant circuit which shows embodiment of the vending machine by this invention. It is the operation example (H) of the refrigerant circuit which shows embodiment of the vending machine by this invention. It is an example of the time chart of the cooling control which shows Embodiment 3 of the vending machine by this invention.

Explanation of symbols

3 Commodity Storage Room 4 Commodity 6 Internal Heat Exchanger 7 External Heat Exchanger 8 Compressor 100 Control Device 101 Operating State Determination Unit 102 Mode Operation Determination Unit 103 Priority Room Determination Unit 105 Set Temperature Memory 110 Operation Mode Selection SW
111 Priority room selection SW

Claims (4)

An internal heat exchanger that is installed in each of a plurality of product storage rooms for storing products to be sold and that cools or heats the product by evaporating or condensing the refrigerant to generate cold, and a refrigerant internal heat exchanger An external heat exchanger that discharges heat to the outside, a compressor that is piped to these heat exchangers and that compresses and compresses the refrigerant that has been evaporated and reduced in pressure by the internal heat exchanger or the external heat exchanger, An electronic expansion valve that depressurizes the refrigerant that has become high pressure, a plurality of electromagnetic valves that switch the direction of the flow of the refrigerant to the internal heat exchanger, and each product storage chamber that detects the temperature in the product storage chamber. A vending machine cooling and heating device comprising temperature detection means and control means for receiving the detection signals from these temperature detection means to control the opening / closing of the solenoid valve and the operation / stop of the compressor,
A plurality of product storage chambers are set to heating or cooling mode, and the internal heat exchanger of the product storage chamber set to the heating operation mode in the operation mode in which cooling and heating operations are performed simultaneously is used as a condenser. A cooling and heating device for a vending machine that designates one product storage room as a priority room and performs a cooling and heating operation based on a signal from a temperature detecting means installed in the priority room.   The heating or cooling operation of the non-priority chamber is performed based on a signal from a temperature detection unit installed in the non-priority chamber when the heating or cooling operation of the priority chamber is suspended. 2. A cooling and heating device for a vending machine according to 1.   Based on the signal from the temperature detection means installed in the non-priority room, the priority room and non-priority room are in the period until the heating or cooling of the priority room is in operation and the heating or cooling operation of the priority room is stopped. The cooling and heating apparatus for a vending machine according to claim 1 or 2, wherein the heating or cooling operation is performed. When a limit temperature range is set for a non-priority room, and the internal temperature of the non-priority room reaches the limit temperature range, the priority room is determined based on the signal from the temperature detection means installed in the non-priority room. 4. The cooling and heating device for a vending machine according to claim 1, wherein the non-priority chamber is heated or cooled.

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