JP3443892B2 - vending machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vending machine in which at least one of a plurality of product storage rooms is for heating a product based on a refrigeration cycle using a compressor, a condenser, a squeezer and an evaporator. Therefore, it relates to an automatic vending machine that can save energy by optimizing the temperature of sold products and effectively using heat energy.

[0002]

2. Description of the Related Art FIG. 15 is a block diagram of a conventional example.
Will be described with reference to. In FIG. 15, this conventional example has two storage chambers 1 and 2 for goods, and cooling based on a refrigerating cycle and heating by a heater can be selectively performed. That is, the storage chamber 1 has an evaporator 81 for cooling, a heater 91 for heating, and a temperature sensor 41 for temperature control, and the storage chamber 2 has an evaporator 82 for cooling and a heater 92 for heating. , And a temperature sensor 42 for temperature control.
To each of the evaporators 81 and 82, each electronic expansion valve 7 as a restrictor and each electromagnetic valve 51, 52 are connected in series. A compressor 3 and a compressor in which the two series units are connected in parallel,
The condenser 13 is connected in series to perform a refrigeration cycle.

In this conventional example, when the product is cooled, each unit constituting the refrigeration cycle operates, and when heating the product, the heater operates in place of each unit constituting the refrigeration cycle. That is, during product cooling, the compressor 3 and each solenoid valve 5 related to the refrigeration cycle
Based on the output of each temperature sensor 41, 42, the on / off of 1, 52 is controlled by an unillustrated control unit with an upper limit value of 7 ° C and a lower limit value of 1 ° C, and each room temperature becomes an average of 4 ° C. . At the time of product heating, ON / OFF of each heater 91, 92 is controlled by the same control unit with an upper limit value of 62 ° C and a lower limit value of 58 ° C based on the output of each temperature sensor 41, 42, and each room temperature has an average value of 60 ° C. ℃. Then, the cans containing the beverages of the products are cooled or heated almost to the room temperature and then put out for sale.

[0004]

In the conventional example, when the storage room is used for both heating products and cooling products, for example, when the storage room 1 is for heating and the storage room 2 is for cooling, the storage room is a storage room. In the condenser 13 that constitutes the refrigeration cycle including the second evaporator 82, the generated heat is wasted only and is not used for heating the storage chamber 1. By utilizing the heat generated in the condenser 13, the power consumption of the heater 91 in the storage chamber 1 can be greatly reduced. In addition, the can of the warm product need only have a warm predetermined temperature at the time of sale, and when it is in the storage room, it can be kept warm at a lower temperature than that.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide an automatic vending machine which can save energy by optimizing the temperature of products to be sold and effectively utilizing heat energy.

[0006]

According to a first aspect of the present invention, in a vending machine, all of the plurality of storage chambers are for heating a product based on a refrigeration cycle using a compressor, a condenser, a throttle and an evaporator. An automatic vending machine, which is installed in each heating storage room and which functions as a condenser, has an indoor heat exchanger, a temperature sensor installed in each heating storage room, and the output of each temperature sensor. Based on the operation of the corresponding indoor heat exchanger,
The control unit that stops and heats the products in each heating containment chamber to a preheating temperature lower than the selling temperature, and the products that are kept warm to the preheating temperature in each heating containment chamber are sold before the sale. Common high frequency induction heating device for final heating to temperature.

A vending machine according to a second aspect is a vending machine in which a heating storage room and a cooling storage room based on a refrigeration cycle using a compressor, a condenser, a throttle and an evaporator are mixed. , An indoor heat exchanger installed in each heating storage room and functioning as a condenser, an indoor heat exchanger installed in each cooling storage room and functioning as an evaporator, and each cooling storage room Based on the installed temperature sensors and the output of each temperature sensor, the indoor heat exchangers of the corresponding cooling storage chambers are activated and deactivated, and at the same time the indoor heat exchangers of each heating storage chamber are operated in a random manner. a control unit for heating the pressurized-heat storage chamber of the item to sell low preheating temperature than the temperature, the product which is maintained at the preheating temperature of the heating storage chamber, sales temperature in the previous step of the sales dispensing Common high frequency induction heating equipment for final heating Provided with a door.

The vending machine according to claim 3 is the vending machine according to any one of claims 1 and 2, wherein the control valve with a variable valve opening is provided with an electronic heat exchanger in series with the outdoor heat exchanger. The opening degree of the control valve, which is connected in parallel with the expansion valve, is determined according to the number of the indoor heat exchangers that are all used as the condenser during the suspension of operation.

The vending machine according to claim 4 operates based on a refrigeration cycle using a compressor and an outdoor heat exchanger,
A vending machine in which a storage room for heating and a storage room for cooling are mixed, and a high-frequency induction heating device for final heating of a product from the storage room for heating before the sale and dispensing, and a first fixed time only The heating storage chamber is controlled to an appropriate temperature and the cooling storage chamber is controlled to an appropriate temperature for a second constant time period alternately, and a control unit for heating the high frequency induction heating device for a certain time period is provided. .

[0010]

In the vending machine according to the first or third aspect of the invention, the product to be heated passes through the indoor heat exchanger functioning as a condenser by the function of the control unit based on the output of the temperature sensor of each heating storage chamber. After being preheated, the product is finally heated to a predetermined temperature by a high frequency induction heating device before the sale.

In the vending machine according to claim 2 or 3,
One of the products to be cooled is cooled to a predetermined temperature via the indoor heat exchanger as an evaporator by the function of the control unit based on the output of the temperature sensor in each cooling storage chamber, and the other product to be heated is After being locally preheated by an indoor heat exchanger functioning as a condenser, it is finally heated to a predetermined temperature by a high-frequency induction heating device before the sale and distribution.

Particularly, in the vending machine according to claim 3, the refrigerating cycle capacity cannot be sufficiently exhibited due to the same reason as in the preceding paragraph, and the heating capacity of the indoor heat exchanger is reduced. Therefore, by increasing the opening degree of the control valve in accordance with the number of indoor heat exchangers that are out of operation, it is possible to improve the shortage of the refrigerant circulation amount.

In the automatic vending machine according to the fourth aspect, the control unit controls the heating storage chamber to an appropriate temperature for the first constant time and controls the cooling storage chamber to the appropriate temperature for the second constant time. This is alternately repeated, and the high-frequency induction heating device is heated for a certain period of time, so that the product from the heating storage chamber finally reaches the set temperature.

[0014]

Embodiments of the vending machine according to the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of the embodiment. In the figure, in order to simplify the explanation,
The two storage chambers 1 and 2 are configured for both heating and cooling, respectively, and both of the case where one of the storage chambers 1 and 2 is a mixed type for heating and the other is for operation. In some cases, all rooms for heating may be heated. It should be noted that the case where all the storage chambers are of the cooling type for cooling all the rooms is excluded from the scope of the present invention. Now, for example, when the storage chamber 1 is of a mixed type for heating and the storage chamber 2 is for cooling, the indoor heat exchanger 11 of the storage chamber 1 is made to have a function as a condenser of a refrigeration cycle, and the interior of the storage chamber 2 is In the heat exchanger 12,
The function as the evaporator of the refrigeration cycle is provided, and the outdoor heat exchanger 4 is provided as the condenser of the refrigeration cycle. At this time, since the refrigeration cycle mainly operates to cool the storage chamber 2, it may be insufficient to warm the storage chamber 1 only with the indoor heat exchanger 11. Therefore, the auxiliary heater 31 is provided side by side. It When both the storage chambers 1 and 2 are for heating, the indoor heat exchangers 11 and 12 of the storage chambers 1 and 2 are
Both of them function as a condenser of the refrigeration cycle, and the outdoor heat exchanger 4 functions as an evaporator of the refrigeration cycle. At this time, the refrigeration cycle has
The indoor heat exchangers 11 and 12 operate to heat each other together.
Is sufficient, and it is not necessary to operate the auxiliary heaters 31 and 32.

The configuration of the embodiment will be described in detail again with reference to FIG. An indoor heat exchanger 11, a blower 21, an auxiliary heater 31, and a temperature sensor 41 are installed in one of the storage chambers 1, and an electromagnetic valve 69 and an electronic expansion valve 7 are connected to the indoor heat exchanger 11 in series. Then, this and the check valve 8 arranged in parallel are connected. The other storage room 2 has an indoor heat exchanger.
12, the blower 22, the auxiliary heater 32, and the temperature sensor 42 are installed, and the indoor heat exchanger 12 includes a solenoid valve 70 and an electronic expansion valve 7.
Are connected in series, and this and the check valve 8 in parallel are connected. Further, switching units 61 and 62 for converting the flow of the refrigerant are installed on both sides of the storage chambers 1 and 2 depending on whether they are for heating or cooling, as will be described later in detail. In addition to these, as a common unit, the compressor 3
There are a four-way valve 6, a check valve 8, an accumulator 9, a set of the outdoor heat exchanger 4 and the blower 5, and a set of the electronic expansion valve 7 and the check valve 8 arranged in parallel. A cycle is constructed. Here, the check valve is shown by the symbol of the diode, and the refrigerant can flow only in the forward direction. In addition, a heating receptacle 50 for final heating the can 10 of the heated product before the sale and dispensing is installed in common in each of the storage chambers 1 and 2. As will be described later in detail, the heating receiver 50 is a constituent unit of a high-frequency induction heating device, in which a coil to which a high-frequency current is applied is formed in a concave shape, and the can 10 is placed at a stage before sales and dispensing. . If the can 10 is a cooled product, of course, the heating receptacle 50 is not used.

The switching units 61 and 62 will be described.
2 is a block diagram of the switching unit 61 in the embodiment, and FIG. 3 is a block diagram of the switching unit 62 in the embodiment. As shown in FIG. 2, the switching unit 61 is a combination of four sets of solenoid valves and check valves, and the switching unit 62 is a combination of six sets of solenoid valves and check valves as shown in FIG. It consists of two combinations. Each switching unit 61, 62, each solenoid valve
The flow of the refrigerant can be converted by selectively opening and closing 71 to 80. Which solenoid valve is opened / closed and how the flow of the refrigerant is converted will be described in the description of the operation operation of the embodiment.

The operation of the embodiment will be described separately for a case where the storage chambers for heating and the cooling are mixed and a case where both storage chambers are for the heating. FIG. 4 is an operation diagram when the storage chambers for heating and cooling are mixed in the embodiment.
In the figure, it is assumed that the storage chamber 1 is for heating and the storage chamber 2 is for cooling. The room temperature of the storage room 1 for heating (preliminary heating temperature of the product) is controlled by the upper limit value of 37 ° C and the lower limit value of 33 ° C, and the room temperature of the storage room 2 for cooling (cooling temperature of the product) is 7 ° C, the lower limit value 1
Controlled in ° C. The solid arrow along the pipe indicates the flow of the condensed refrigerant, and the broken arrow indicates the flow of the evaporated refrigerant. The indoor heat exchanger 11 of the storage chamber 1 functions as a condenser, the indoor heat exchanger 12 of the storage chamber 2 functions as an evaporator,
The outdoor heat exchanger 4 functions as a condenser. The high-pressure gas refrigerant compressed by the compressor 3 flows through the four-way valve 6 to the outdoor heat exchanger 4, where it partially radiates heat, and then reaches the switching unit 62 through the check valve 8. The condensed refrigerant reaches the electronic expansion valve 7 of the storage chamber 2 through the indoor heat exchanger 11 of the storage chamber 1 and the check valve 8 through the switching unit 62 as shown by the solid line arrow, and expands there. It becomes a low-pressure two-phase refrigerant and absorbs heat from the room by the indoor heat exchanger 12 to evaporate and cool the room. Here, the solenoid valve 69 of the storage chamber 1 is closed and the solenoid valve 70 of the storage chamber 2 is opened. This evaporation refrigerant is
It flows out from the left side opening via the switching unit 61 and the four-way valve 6
And flows there as shown by the broken line arrow, returns to the compressor 3 via the accumulator 9 and the check valve 8, and is compressed there to become high-pressure gas refrigerant again. In this case, one of the storage rooms 1
Of the indoor heat exchanger 11 as a condenser, and the other storage chamber 2
Since the indoor heat exchanger 12 of FIG. 6 operates as an evaporator, the indoor heat exchanger 12 can be thermally mutually utilized and the overall power consumption can be saved.

By the way, the flow of the refrigerant by each switching unit 61, 62 is determined by opening and closing the solenoid valve inside. For the operation of FIG. 4, in the switching unit 61 (see FIG. 2), solenoid valves 71, 72, 73: closed, solenoid valve 74: open, and in the switching unit 62 (see FIG. 3), solenoid valves 75, 77. , 78, 79,
80: closed, solenoid valve 76: open. Moreover, the solenoid valve 76 measures the room temperature by the temperature sensor 42 in the storage chamber 2,
It is opened / closed according to on / off control of a control unit (not shown) relating to cooling of the storage chamber 2 based on the upper limit value of 7 ° C. and the lower limit value of 1 ° C. When the compressor 3 is stopped together with the closing of the electromagnetic valve 76, the flow of the condensed refrigerant related to the indoor heat exchanger 11 of the storage chamber 1 is also stopped, so that the room temperature of the storage chamber 1 is
When the lower limit value of 33 ° C. relating to the preheating temperature is less than 33 ° C., the control unit turns on the auxiliary heater 31 to perform the auxiliary heating. In addition, the room temperature of the storage room 1 is the upper limit value related to the preheating temperature.
When the condensed refrigerant flows to the indoor heat exchanger 11 at 37 ° C. or higher, the blower 21 is stopped to substantially stop the function of the indoor heat exchanger 11 so that the storage chamber 1 is not heated. To do.

Now, the transition of the room temperature of each of the storage chambers 1 and 2 when the above operation is performed will be described with reference to FIG. FIG. 6 is a time chart of the room temperature of each storage chamber when the storage chambers for heating and cooling are mixed in the embodiment. In the figure, the upper diagram corresponds to the storage room 1, and is maintained at an average room temperature of 35 ° C within the upper limit of 37 ° C and the lower limit of 33 ° C. In other words, the product cans are also kept at an average of 35 ° C ( It will be preheated). The temperature of the cans at the time of sale is 60 ° C.
Therefore, as already mentioned, before the sales investment,
It is placed on the heating tool 50 (see FIG. 1) belonging to the induction heating device and is rapidly heated to the sales temperature of 60 ° C.
In addition, the lower diagram corresponds to the storage room 2 and is maintained at room temperature of an average of 4 ° C within the upper limit of 7 ° C and the lower limit of 1 ° C. In other words, the product cans are also cooled to an average of 4 ° C. Will be.

By the way, when the above heating and cooling storage chambers are mixed, the auxiliary heater 31 and the temperature sensor 41 of the heating storage chamber 1 can be eliminated. That is, the cooling product has the function of the control unit based on the output of the temperature sensor 42 of the cooling storage chamber 2, and thus the indoor heat exchanger as the evaporator.
Since it is cooled to a predetermined temperature via 12, that is, the cooling is mainly performed, the product in the heating containment chamber 1 is randomly heated by the indoor heat exchanger 11 functioning as a condenser, and its heating temperature is generally It deviates from the predetermined preheating temperature. However, since this product is finally heated to a predetermined temperature by the heating receiving member 50 before the next sale and dispensing, there is no practical problem. This method corresponds to claim 2.

Next, the case where both the storage chambers 1 and 2 are for heating will be described with reference to FIG. 5, which is an operation diagram when all the storage chambers are for heating in the embodiment. In the figure, the indoor heat exchangers 11 and 12 of the respective storage chambers 1 and 12 function as condensers, and the outdoor heat exchanger 4 functions as an evaporator. The high-pressure gas refrigerant compressed by the compressor 3 flows through the four-way valve 6 to the switching unit 61, through which the indoor heat exchangers 11 and 12 belonging to the respective storage chambers 1 and 12 are indicated by solid line arrows. It flows and releases heat to warm each room. The condensed refrigerant then merges and the electronic expansion valve 7 is passed through the switching unit 62.
And expands here to become a low-pressure two-phase refrigerant as indicated by a dashed arrow, and the outdoor heat exchanger 4 absorbs heat from the outside air. After that, the evaporative refrigerant reaches the four-way valve 6, through which it passes through the accumulator 9 and the check valve 8 and returns to the compressor 3, where it is compressed and becomes high-pressure gas refrigerant again. In this case, both the indoor heat exchanger 11 of the one storage chamber 1 and the indoor heat exchanger 12 of the other storage chamber 2 operate as a condenser, so that they are not thermally mutually utilized. Here, the solenoid valves 69 and 70 of the storage chambers 1 and 2 are both closed. But,
In each storage room 1 and 2, the final temperature of the product is considerably lower than 60 ℃ 35
It is heated to ℃ and kept warm.
It doesn't need to be ℃, so the power consumption here is small. Then, since the final heating is performed by the induction heating method having high thermal efficiency to obtain the temperature of 60 ° C. at the final stage, the overall power consumption of the heating storage chamber and the induction heating device is reduced as compared with the conventional example.

By the way, the flow of the refrigerant by each switching unit 61, 62 is controlled by opening and closing the solenoid valve inside. For the operation of FIG. 5, in the switching unit 61 (see FIG. 2), the solenoid valves 72, 74: closed, solenoid valves 71, 73: open, and in the switching unit 62 (see FIG. 3), the solenoid valve 75, 76, 78,
79, 80: closed, solenoid valve 77: open. Moreover,
Each solenoid valve 71, 73 of the switching unit 61 has a lower limit value of room temperature of 33 ° C.
With regard to the above, based on the room temperature measurement by the temperature sensors 41 and 42 of the respective storage chambers 1 and 2, they are opened at different time points. In other words, the room temperature of each of the storage chambers 1 and 2 never becomes lower than the lower limit value. However, the solenoid valves 71 and 73 are closed synchronously when both the storage chambers 1 and 2 reach the room temperature upper limit value of 37 ° C. or higher. In other words, when one of the storage chambers 1 and 2 reaches the upper limit value of 37 ° C first and the other reaches the upper limit value of 37 ° C after a delay, the solenoid valves 71 and 73 are closed to heat. Will stop. At that time, the room temperature of the one having reached the upper limit value of 37 ° C is slightly higher than the upper limit value of 37 ° C, but the room temperature here is related to preheating, and the final heating to 60 ° C in the subsequent step. There is no problem because it does.

Now, the transition of the room temperature of each of the storage chambers 1 and 2 when the above operation is performed will be described with reference to FIG. FIG. 7 is a time chart of the room temperature of each storage chamber when all the storage chambers are for heating in the embodiment. In the figure, a thick solid line corresponds to the storage chamber 1, and a thin solid line corresponds to the storage chamber 2. Therefore, the room temperature of the containment room 1 is maintained at an average of 35 ° C within the upper limit of 37 ° C and the lower limit of 33 ° C. In other words, the product cans are also kept at an average temperature of 35 ° C (preheating). On the other hand, the room temperature of the storage room 2 is
This agrees with this on the lower limit side, but it slightly exceeds the upper limit value, and as a result, the average temperature slightly exceeds the target of 35 ° C. However, as described above, since the final heating is performed at 60 ° C. in the subsequent step, there is no practical problem.

Now, the means for performing the final heating will be described with reference to FIG. FIG. 8: is a side view and (b) is the top view regarding a heating receptacle. The heating receiver 50 is a coil that is wound in a substantially rectangular spiral shape and is curved and formed into a substantially semicircular shape along the long side thereof. The leader line extends to the upper right. A can 10 with a drink as a one-dot chain line product has already been stored in the heating storage room.
Transferred while being preheated to 35 ° C.
It is placed in the curved concave part of, where it is finally heated to 60 ° C and then sold. A high frequency power source (not shown) is connected to the coil, and a high frequency current is applied to generate an alternating magnetic field. The alternating magnetic field causes an eddy current to flow inside the can 10 based on the law of electromagnetic induction, and the entire can 10 is heated by the Joule heat generated thereby. Here, it is accurate to obtain the predetermined final temperature based on the output of a temperature sensor (not shown) installed so as to contact the can 10. It is also possible to simply depend on the heating time (mounting time). By the way, the magnitude of the eddy current, that is, the amount of Joule heat generated is proportional to the rate of change of the magnetic field, that is, the frequency of the high frequency current. This induction heating has a thermal efficiency of 80.
The feature is that it is very high, close to%, and clean.

Now, returning to FIG. 1, the control of the flow rate of the refrigerant relating to the outdoor heat exchanger 4 which operates as an evaporator will be described. When the amount of the refrigerant flowing through the outdoor heat exchanger 4 is proper, the evaporation of the refrigerant is completed just before the outlet of the outdoor heat exchanger 4,
Then it gets overheated somewhat and goes out. If the amount of refrigerant is insufficient, the evaporation will be completed quite before the outlet, and the superheat at the outlet will be large and the vapor will come out. On the contrary, when the amount of the refrigerant increases, the evaporation completion point approaches the outlet and finally reaches the outlet while leaving the unvaporized liquid. Therefore, the degree of superheat of the outdoor heat exchanger 4 is a measure of its cooling capacity, and is usually 5 to 5.
Aim for 10 ° C. Since the degree of superheat of the outdoor heat exchanger 4 is the temperature difference between the inlet and the outlet thereof, it is measured by a temperature sensor and the opening degree of the electronic expansion valve 7 is controlled by feedback control via a control device (not shown). And matches the target value.

FIG. 11 is a first characteristic diagram of the degree of superheat of the outdoor heat exchanger 4 with respect to the valve opening. The indoor heat exchanger 1 as a condenser is shown in FIG.
It corresponds when 1 and 12 drive together. The characteristic diagram of FIG. 11 shows that the degree of superheat can be set to a target value (10 ° C. in this case) within the range of the opening degree of the electronic expansion valve 7. The heat exchange capacity of the outdoor heat exchanger 4 is determined by the indoor heat exchanger 11,
It is determined based on the time when 12 work together, in other words, in that case, the outdoor heat exchanger 4 and the indoor heat exchangers 11, 12 are
And the ability balance with.

FIG. 12 is a second characteristic diagram of the degree of superheat of the outdoor heat exchanger 4 with respect to the valve opening, and corresponds to when one of the indoor heat exchangers 11 and 12 is out of operation. In this case, the capacity balance between the outdoor heat exchanger 4 and the indoor heat exchangers 11 and 12 is lost. That is, the characteristic diagram of FIG. 12 shows that, within the range of the opening degree of the electronic expansion valve 7, the degree of superheat always exceeds the target value of 10 ° C. and cannot be set to the target value.

Therefore, as shown in a modification of the outdoor heat exchanger in the embodiment of FIG. 9, a capillary tube 81 and a solenoid valve 82 connected in series are connected in parallel with the electronic expansion valve 7. , This solenoid valve 82, the indoor heat exchanger
Open when one of 11 and 12 is out of service. By doing so, the characteristic of the degree of superheat of the outdoor heat exchanger 4 with respect to the valve opening degree can be improved as shown in FIG. That is, the solid line in FIG. 13 is a third characteristic diagram with respect to the valve opening degree of the superheat degree of the outdoor heat exchanger 4, and the superheat degree can be set to the target value 10 ° C. within the opening degree range of the electronic expansion valve 7. become. Also, the figure
The broken line 13 is the characteristic diagram of FIG. 12 shown again for comparison, and shows that the broken line characteristic diagram translated in the vertical axis direction becomes the solid line characteristic diagram. Of course, when the indoor heat exchangers 11 and 12 operate together, the solenoid valve 82 is closed and only the electronic expansion valve 7 is used.

By the way, what should be noted here is that FIG.
Alternatively, a method of increasing the capacity of the electronic expansion valve 7 in FIG. 1 can be used, but this is a difference. The fourth characteristic diagram of the degree of superheat of the outdoor heat exchanger with respect to the valve opening degree corresponds to the case where one electronic expansion valve having a large capacity is used. As is clear from the characteristic diagram of FIG. 14, the rate of change of the degree of superheat with respect to the valve opening is larger than the rate of change in FIG. In contrast to this drawback, according to a modification of FIG. 9, the rate of change of the degree of superheat with respect to the valve opening degree based on the capacity of the electronic expansion valve 7 is not changed, and the refrigerant is opened by an opening amount corresponding to the capillary tube 81. By increasing the flow rate, the degree of superheat corresponding to the same valve opening can be corrected downward.

In the embodiment of FIG. 9, since the number of indoor heat exchangers is two, it is sufficient to use one set of capillary tube and solenoid valve connected in series. In general, when there are N indoor heat exchangers as condensers, it is a design matter how many sets are made, and how many solenoid valves are to be opened among the indoor heat exchangers at that time. Depends on the number of non-operational items.

Increasing the number of pairs of capillary tubes and solenoid valves connected in series is disadvantageous in terms of space and also increases the probability of failure. Therefore, instead, one control valve with variable opening is used. Can be Another modification around the outdoor heat exchanger in the embodiment of FIG. 10 shows this, and one control valve 83 is provided in parallel with the electronic expansion valve 7. According to this another modification, since the opening degree of the control valve 83 is continuously variable, even when the capacity of each indoor heat exchanger is different,
There is an advantage that it is possible to flexibly cope with the situation unlike in the one modification.

Two other embodiments will be described. The two different embodiments are structurally different from the previous embodiment in that the storage chamber 1 is always set for heating and the storage chamber 2 is set for cooling in FIG. Heater 31, 32
Are removed and the operation of the control unit (not shown). One of the other two embodiments corresponds to claim 4.

In one embodiment corresponding to claim 4, the control unit controls the heating storage chamber 1 for the first fixed time.
Is controlled to an appropriate temperature, for example, 35 ° C. (range of 33 to 37 ° C.), and the containment chamber 2 for cooling is controlled to an appropriate temperature, for example, 4 ° C. (range of 1 to 7 ° C.) for the next second constant time. , This is repeated alternately, and the heating receiver 50 belonging to the high-frequency induction heating device has a final setting temperature of the product, for example, 60 ° C.
Is heated for a certain time so that Therefore,
Since the storage chamber 1 is not provided with an auxiliary heater, the cost can be reduced accordingly, and since the temperature of the storage chambers 1 and 2 is not controlled at the same time, the energy can be saved accordingly. The temperature is maintained close to a suitable temperature to the extent that it does not exist, and the first and second predetermined times are rationally determined according to the number of the storage chambers 1 and 2, so that each temperature control is appropriately performed, and originally, Since the storage chamber 1 is kept at an appropriate temperature and constant, the heating receiver 50 can be heated for a fixed time, and its control becomes easy.

In the other embodiment, the controller causes
The heating container 50 is controlled so that the cooling storage chamber 2 is controlled to an appropriate temperature, for example, 4 ° C. (range of 1 to 7 ° C.) on average, and the product from the heating storage chamber 1 finally reaches a set temperature, for example, 60 ° C. Heating time is controlled. Therefore, similar to the first embodiment, since the auxiliary heater is not provided in the storage chamber 1, the cost can be reduced accordingly, and only the cooling storage chamber 2 is temperature-controlled, so that the control becomes simpler ( The storage room 1 for heating is heated in a gradual manner, but since the products from there are finally heated to the set temperature by the heating fixture 50, there is no hindrance), especially the products for heating are newly stored. At this time, it is no longer necessary to wait for sales until the appropriate temperature is reached, unlike in the past.

[0035]

In the automatic vending machine according to the first or third aspect of the present invention, the article to be heated is an indoor heat exchanger that functions as a condenser by the function of the control unit based on the output of the temperature sensor of each heating storage chamber. After being pre-heated through, it is finally heated to a predetermined temperature by a high-frequency induction heating device in a stage before the sale and sale. Therefore, since the heated product is heated and kept at a preheating temperature lower than the final temperature in the storage room and is heated to the final temperature by the high-frequency induction heating device having high thermal efficiency, the entire product in the storage room and the high-frequency induction heating device is heated. It consumes less energy and saves energy.

In the vending machine according to claim 2 or 3,
One of the products to be cooled is cooled to a predetermined temperature via the indoor heat exchanger as an evaporator by the function of the control unit based on the output of the temperature sensor in each cooling storage chamber, and the other product to be heated is After being locally heated by an indoor heat exchanger functioning as a condenser, it is finally heated to a predetermined temperature by a high-frequency induction heating device before the sale and distribution.
Therefore, since a temperature control device is not installed in the heating storage room, the temperature can be simplified and the cost can be reduced, and the indoor heat exchanger functioning as a condenser for heating and the evaporator for cooling can be achieved. The indoor heat exchanger, which functions as a heat exchanger, is thermally mutually used to save energy as a whole. Here, since heated commodities are heated spontaneously, there is generally a large deviation from the predetermined preheating temperature, but they are heated to the final temperature by a high-frequency induction heating device with high thermal efficiency before the sale and distribution. So it doesn't really matter.

Particularly, in the vending machine according to the third aspect, the heat exchange capacity of the outdoor heat exchanger is determined corresponding to when all the indoor heat exchangers are used as the condenser, so that the operation is actually stopped. If there is an indoor heat exchanger, the capacity of the evaporator of the outdoor heat exchanger becomes excessive, the amount of refrigerant circulation becomes insufficient, and it becomes impossible to control to match the superheat degree to the target value. Will not be able to exert their full potential,
The heating capacity of the indoor heat exchanger is reduced. Therefore, by increasing the opening degree of the control valve according to the number of indoor heat exchangers that are out of operation, it is possible to improve the shortage of the refrigerant circulation amount, and as a result, the time required for heating the storage chamber can be reduced. It can be shortened. Further, since the opening degree of the control valve is continuously variable, there is an advantage that it can flexibly cope with the case where the capacities of the indoor heat exchangers are different.

In the automatic vending machine according to the fourth aspect, the control unit controls the heating storage chamber to an appropriate temperature for the first constant time, and controls the cooling storage chamber to the appropriate temperature for the second constant time. This is alternately repeated, and the high frequency induction heating device is heated for a fixed time. Therefore, the following effects can be expected. (1) Since an auxiliary heater is not provided in the heating storage chamber, the cost can be reduced accordingly. (2) Since the temperature of each of the storage chambers for heating and cooling is not controlled at the same time, the energy can be saved accordingly, and the temperature of each storage chamber can be maintained at an appropriate temperature or close to an appropriate temperature so as not to cause any practical problems. (3) The temperature control is appropriately performed by setting the first and second constant times according to the number of the storage chambers for heating and cooling. (4) Since the storage room for heating is kept at an appropriate temperature and constant, the products from there will finally reach the set temperature by heating the high-frequency induction heating device for a certain period of time, which makes the control of the high-frequency induction heating device easier. Become.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment according to the present invention.

FIG. 2 is a configuration diagram of one switching unit in the embodiment.

FIG. 3 is a configuration diagram of the other switching unit in the embodiment.

FIG. 4 is an operation diagram when heating and cooling storage chambers are mixed in the embodiment.

FIG. 5 is an operation diagram when all the storage chambers are for heating in the embodiment.

FIG. 6 is a time chart of the room temperature of each storage chamber when the storage chambers for heating and cooling are mixed in the example.

FIG. 7 is a time chart of the room temperature of each storage chamber when all the storage chambers are for heating in the example.

FIG. 8 (a) is a side view of the heating receiver,
(B) is a plan view

FIG. 9 is a schematic view of a modification of the outdoor heat exchanger and its surroundings in the embodiment.

FIG. 10 is a schematic diagram of another modification around the outdoor heat exchanger in the embodiment.

FIG. 11 is a graph showing the first degree of superheat of the outdoor heat exchanger with respect to the valve opening degree.
Characteristic diagram of

FIG. 12 is a second diagram of the degree of superheat of the outdoor heat exchanger with respect to the valve opening degree.
Characteristic diagram of

FIG. 13 is a third graph of the degree of superheat of the outdoor heat exchanger with respect to the valve opening degree.
Characteristic diagram of

FIG. 14 is a fourth diagram of the degree of superheat of the outdoor heat exchanger with respect to the valve opening degree.
Characteristic diagram of

FIG. 15 is a configuration diagram of a conventional example.

[Explanation of symbols]

1,2 storage room 3 compressor 4 outdoor heat exchanger 5 blower 6 four-way valve 7 Electronic expansion valve 8 Check valve 9 Accumulator 10 cans 11, 12 Indoor heat exchanger 21,22 blower 31, 32 Auxiliary heater 41, 42 Temperature sensor 50 Heating receiver 61, 62 switching unit 69-80 Solenoid valve 81 Capillary tube 82 Solenoid valve 83 Control valve

─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-51-103499 (JP, A) JP-A-2-26000 (JP, A) JP-A-2-76095 (JP, A) Actual development Sho-56- 132585 (JP, U) Actual development 56-81360 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G07F 9/10 F25D 11/00

Claims (4)

(57) [Claims] 1. An automatic vending machine, wherein all of the plurality of storage chambers are for heating goods based on a refrigeration cycle using a compressor, a condenser, a squeezer and an evaporator, and each storage chamber for heating. The indoor heat exchangers installed in each of the above, functioning as a condenser, the temperature sensors installed in each heating storage room, and the corresponding indoor heat exchangers are activated and deactivated based on the output of each temperature sensor. Control unit that heats the products in each heating containment chamber to a preheating temperature lower than the selling temperature, and the products that are kept at the preheating temperature in each heating containment chamber to the selling temperature before the sale A vending machine comprising a common high-frequency induction heating device for final heating. 2. A vending machine in which a storage room for heating and a storage room for cooling based on a refrigeration cycle using a compressor, a condenser, a throttle, and an evaporator are mixed, and each storage room for heating is a vending machine. An indoor heat exchanger that is installed and functions as a condenser, an indoor heat exchanger that is installed in each cooling storage room and that functions as an evaporator, and a temperature sensor installed in each cooling storage room, Corresponding based on the output of each temperature sensor
The indoor heat exchanger in each cooling containment chamber is activated and deactivated, and at the same time the indoor heat exchanger in each heating containment chamber is used
A control unit for heating the pressurized-heat storage chamber of the item into a low preheating temperature than sales temperature, the product which is maintained at the preheating temperature of the heating storage chamber, sales temperature in the previous step of the sales dispensing And a common high-frequency induction heating device for final heating. 3. The vending machine according to claim 1, wherein a control valve with a variable valve opening is connected in parallel with an electronic thermal expansion valve in series with the outdoor heat exchanger, An automatic vending machine characterized in that the opening of each of the control valves is determined according to the number of indoor heat exchangers used as condensers that are not in operation. 4. An automatic vending machine which operates on the basis of a refrigeration cycle using a compressor and an outdoor heat exchanger, and which has a storage room for heating and a storage room for cooling in a mixed manner. A high-frequency induction heating device that finally heats the product before it is sold and put in, and controls the heating storage room to an appropriate temperature for a first fixed time, and controls the cooling storage room to an appropriate temperature for a second fixed time. An automatic vending machine comprising: a control section for heating the high-frequency induction heating device for a certain period of time while alternately repeating the above.