JPH02105292A - Automatic vending machine - Google Patents

Abstract

PURPOSE:To keep a set temperature in plural rooms of a vending machine by controlling these rooms independently of each other in case one or more rooms are heated and stopping the drive of a compressor when these rooms are set approximately at the set temperatures. CONSTITUTION:The inside of a main body 21 is divided into three rooms 24-26 or more, and both rooms 25 and 26 can be switched between the cooling and heating operations. An evaporator 30 is used to cool the rooms 24-26; while the heaters 34 and 35 are used to heat the rooms 25 and 26 respectively. Then the evaporator 30 and the heaters 34 and 35 supply the cooling air and the heating air to the rooms 24-26 by means of the fan devices 31-33. When the cooling operation is switched to the eating operation in both rooms 25 and 26, a control means controls individually a compressor having a refrigerating cycle, the fan devices 32 and 33, and the heaters 34 and 35 based on the temperature detection signals detected by the temperature sensors 45-48. When the rooms 25 and 26 are kept approximately at the set temperatures, the drive of the compressor is stopped. Thus the temperatures are surely kept at the set levels in both rooms 25 and 26. In such a way, the rooms 25 and 26 can be accurately cooled or heated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a vending machine having a switchable cooling and heating chamber.

(Prior Art) A conventional vending machine is shown in FIG. That is, 1 is a main body consisting of a heat-insulating casing, and the left ventricle 2. It is divided into a middle ventricle 3 and a right ventricle 4. In this case, the left ventricle 2 and the right ventricle 4 are each divided into eight columns, and the middle chamber 3 is divided into four columns.

5.6 and 7 are machine chambers formed in the lower part of the main body 1, and these are the left ventricle 2. They correspond to the middle ventricle 3 and the right ventricle 4, respectively. Reference numeral 8 denotes one evaporator of the refrigeration cycle, which is disposed deep within the machine rooms 5, 6 and 7 so as to straddle them. 9.10 and 11 are fan devices, which are installed in the machine rooms 5, 6 and 7, respectively.
It is located inside. 12 and 13 are heaters, which are arranged in the machine rooms 6 and 7, respectively. The fan device 9 then directs the cold air from the evaporator 8 to the left ventricle 2.
It is designed to be supplied internally. When the fan device 10 is switched to the cooling side, it supplies cold air from the evaporator 8 into the middle chamber 3 (!
When the heater 2 is operated, hot air from the heater 12 is supplied into the middle chamber 3.

Further, when the fan device 11 is switched to the cooling side, it supplies cold air from the evaporator 8 into the right ventricle 4, and when it is switched to the heating side and the heater 13 is operated, the fan device 11 supplies hot air from the heater 13 to the right ventricle. It is designed to be supplied within 4 days. That is, the left chamber 2 is formed as a cooling chamber exclusively for cooling, and the middle chamber 3 is formed as a cooling chamber exclusively for cooling.
The right chamber 4 is formed as a switching chamber capable of switching between cooling and heating. 14 is an evaporator 8 located on the left ventricular 2 side.
This is a lH degree sensor attached to the evaporator 8, which turns on to operate the refrigeration cycle compressor when the temperature of the evaporator 8 reaches the upper limit set temperature, and turns off when the lower limit set temperature is reached to stop the operation of the compressor. It has become. 15 and 16 are temperature sensors that detect the temperature inside the middle chamber 3 and right chamber 4, and these sensors operate the heaters 12 and 13 when the temperature inside the middle chamber 3 and right chamber 4 respectively become lower than the set temperature. When the set temperature is exceeded, the operation of the heaters 12 and 13 is stopped.

(Problem m to be solved by the invention) According to the conventional configuration, the left ventricle 2. When the middle chamber 3 and the right chamber 4 are all in the cooling operation (C, C, C), the temperature of all the chambers is controlled to be substantially constant at the set temperature, as shown by the rOJ mark in FIG. 7. However, for example, if the left ventricle 2 and middle chamber 3 are in a cooling operation and the right ventricle 4 is in a heating operation (C, C, H), the hot air in the right ventricle 4 may affect the middle chamber 3 or the left ventricle 2
However, there is a problem in that the temperature of the middle chamber 3 becomes significantly higher than that of the left ventricle 2, as shown by the "X" mark in FIG. 7. In addition, left ventricle 2 and right ventricle 4
is the cooling operation and the middle chamber 3 is the heating operation (C.

In the case of H, C), the hot air from the middle chamber 3 is transferred to the left ventricle 2 and right ventricle 4.
There is no problem since they affect the same way, but the sizes of left ventricle 2 and right ventricle 4 are different, for example, left ventricle 2 is divided into 4 columns and right ventricle 4 is divided into 8 columns. Sometimes, the influence of the hot air in the middle chamber 3 on the right ventricle 4 is reduced, causing the temperature of the right ventricle 4 to become significantly lower than the set temperature, as indicated by the "△" mark in FIG.

The present invention has been made in view of the above circumstances, and its purpose is to ensure that when a chamber that can be switched between cooling and heating is in heating operation, the temperature of the remaining chamber in cooling operation becomes approximately the set temperature. The goal is to provide a vending machine that can be reliably controlled.

[Structure of the Invention] (Means for Solving the Problems) The vending machine of the present invention has an interior partitioned into three or more chambers, at least one of which can be switched between cooling and heating. A main body is provided, an evaporator of a refrigeration cycle is provided for cooling each chamber, a heater is provided for heating the switchable chamber, and a heater corresponding to the cooling side supplies cold air from the evaporator to that chamber. For those corresponding to the heating side, each chamber is provided with a fan device corresponding to χ·1 so as to supply hot air from the heater to that chamber, and a temperature sensor is provided to detect the temperature of each of the chambers. A control means is provided for controlling a compressor, a fan device, and a heater of the refrigeration cycle based on a temperature detection signal from a temperature sensor, and when the switchable chamber is switched to heating, the control means is activated to control the switchable chamber. In addition to operating the corresponding heaters and fan devices, the fan devices corresponding to the remaining chambers were operated independently and intermittently so that each chamber reached approximately the set temperature, and all of the remaining chambers reached approximately the set temperature. The present invention is characterized in that the compressor is configured to stop operation at certain times.

(Function) According to the vending machine of the present invention, when the switchable chamber is in heating operation and the remaining chambers are in cooling operation, the temperature of the remaining chambers becomes approximately the set temperature. The fan devices corresponding to the remaining chambers are independently operated intermittently, and when the temperature of all the remaining chambers reaches approximately the set temperature, the operation of the compressor is stopped. The temperature of the remaining chambers being operated will not be significantly higher or lower than the set temperature.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 5.

First, the overall schematic configuration will be described according to FIGS. 2 to 4. Reference numeral 21 denotes a main body consisting of a heat insulating casing, and the interior is divided into a left ventricle 24, a middle chamber 25, and a right ventricle 26 by partition walls 22 and 23.
It is divided into In this case, the left ventricle 24 and the right ventricle 26 are divided into, for example, eight columns, and the middle chamber 25 is divided into four columns. 27, 28 and 2 are machine chambers formed in the lower part of the main body 2], and these are the left ventricle 24. It corresponds to the middle ventricle 25 and the right ventricle 26 by λ·l, respectively. Reference numeral 30 denotes one evaporator of the refrigeration cycle, which is disposed in the machine room 27, 23 and the two inner parts so as to straddle these. 31, 32 and 33 are fan devices for the left chamber, the middle chamber, and the stone chamber, and these are arranged in the machine chambers 27, 28 and 29, respectively. 34 and 35 are heaters for the middle chamber and the right ventricle, which are arranged in the machine room 28 and the two chambers, respectively. Therefore, the left ventricle 24 becomes a cooling chamber exclusively for cooling, the middle chamber 25 and the right ventricle 2.
6 is a switching chamber capable of switching between cooling and heating.

Here, the structure of the machine room 28 of the middle room 25 and JIJ will be described according to FIGS. 3 and 4. That is, a shutter 36 is disposed in the front portion of the evaporator 30 so as to be movable up and down, and a guide plate 37 is pivotally disposed above the shutter 36 so as to be rotatable left and right. Historically, a switching lever '8 is pivotally mounted on the front side of the evaporator 30 so as to be able to rotate up and down. Further, the aforementioned mid-chamber fan device 32 and mid-chamber heater 34 are located on the J- side (in front of the evaporator 30). In the state shown in FIG. 3 in which the operating portion 38a of the switching lever 38 is operated downward, the shutter 36 is moved to the upper position, and the guide plate 37 is accordingly rotated to the right.

As a result, when the mid-chamber fan device 32 is operated, the air in the mid-chamber 25 is sucked into the machine room 28 from the suction port 39, and the sucked air, as shown by the arrow 40,
It is supplied into the middle chamber 25 via the evaporator 30 and the middle chamber fan device 32. Therefore, if the compressor 41 (see Figure 1) of the refrigeration cycle is operating, the middle chamber 2
Cool air from the evaporator 30 is supplied into the inside of the evaporator 5 to perform a cooling operation. In addition, the operating portion 38a of the switching lever 38
In the state shown in FIG. 4 in which the shutter 36 is moved upward, the shutter 36 is moved to the downward position, and the guide plate 37 is accordingly rotated to the left.

As a result, when the middle room fan device 32 is operated, the air sucked into the machine room 28 from the suction port 39 bypasses the evaporator 30 and passes through the middle room fan device as shown by the arrow 42. 32 and into the middle chamber 25. Therefore, if the middle chamber heater 34 is energized and is operating to generate heat, hot air from the middle chamber heater 34 is supplied into the middle chamber 25.
Heating operation is then performed. The above describes the 11M configuration of the machine room 28 for the middle chamber 25, but the structure of the machine room 29 for the right ventricle 26 is also exactly the same as described above, and the machine room 27 for the left ventricle 24 is The configuration of the shutter 36. It is substantially the same as described above except for the guide plate 37 and the switching lever 38.

In addition, in FIG. 2, 43 is the left ventricle 2 of the evaporator 30.
This is a temperature sensor for the evaporator attached to the 4th side, and is made of a negative characteristic thermistor. 44, 45 and 46 are the left ventricle 24. These are cold temperature sensors for the left chamber, the middle chamber, and the stone chamber that detect the temperature of the middle chamber 25 and the right chamber 26, and these are also made of negative characteristic thermistors. 47 and 48 are hot temperature sensors for the middle chamber and for the stone chamber that detect the temperatures of the middle chamber 25 and the right chamber 26, respectively, and these are also made of negative characteristic thermistors.

Now, the configuration of the electric circuit will be described according to FIG.

49 is an evaporator temperature detection circuit composed of an evaporator temperature sensor 43 and a resistor, and its detection terminal 49a and reference terminal 49b are connected to the non-inverting input terminal (+) and the inverting input terminal (-) of the comparator 50. ing. This comparator 50 outputs No. 15 at a high level when the temperature detected by the evaporator temperature sensor 43 reaches the upper limit set temperature (for example, 4°C), and the lower limit set temperature (
When the temperature reaches the defrosting start temperature), the output signal becomes low level.

Reference numeral 51 denotes a cold temperature detection circuit for the stomach chamber, which is composed of a cold temperature sensor 44 for the left ventricle and a resistor, and its detection terminal 51a and reference terminal 51b are the non-inverting input terminal (10) and the inverting input terminal (-) of the comparator 52. It is connected to the. 53 is a cold temperature detection circuit for the middle room, which is composed of a cold temperature sensor 45 for the middle room and a resistor;
The detection terminal 53a and base terminal 53b are connected to the converter 5.
4 non-inverting input terminal J'-(+) and inverting input terminal (-)
It is connected to the. In history, 55 is a cold temperature detection circuit for the stone chamber composed of a cold temperature sensor 46 for the right ventricle and a resistor, and its detection terminal 55a and base terminal 55
b is connected to the non-inverting input terminal (+) and the inverting input terminal (-) of the comparator 56. In this case, the comparators 52, 54 and 56 are connected to the cold temperature sensor 4, respectively.
4° The detected temperature at 45 and 46 is the set temperature (e.g. 3°C)
When the temperature exceeds the set temperature, the output signal becomes high level, and when the temperature falls below the set temperature, the output signal becomes low level. Reference numeral 57 denotes a middle room hot temperature detection circuit composed of a middle room hot temperature sensor 47 and a resistor, and its detection terminal 57a and reference terminal 57b are connected to the inverting input terminal (-) and non-inverting input terminal (+) of the converter 58. )It is connected to the. Furthermore, 59 is a right ventricular hot temperature detection circuit composed of a right ventricular hot temperature sensor 48 and a resistor, and its detection terminal 59a
and the base terminal 59b is the inverting input terminal J of the comparator 60.
' (-) and non-inverting input terminal (+). In this case, the comparators 58 and 60 output signals at a low level when the detected temperatures of the hot temperature sensors 47 and 48 exceed a set temperature (for example, 55° C.), and output signals at a high level when the temperature falls below the set temperature. 6] is a changeover detection switch for the middle chamber, which is activated when the operation part 38a of the changeover lever 38 of the machine room 28 is operated upward (
(See FIG. 4) That is, it is turned on when the middle chamber 25 is switched to the heating operation side.

The mid-chamber changeover detection switch 61 and a resistor constitute a mid-chamber changeover detection circuit 62, and when the changeover detection switch 61 is turned on, the detection signal at the detection terminal 62a becomes high level. 63 is a right ventricular switching detection switch, which is turned on when the right ventricle 26 is switched to the heating operation side. This right ventricular changeover detection switch 63 is connected to the right ventricular changeover detection circuit 6 together with a resistor.
4, and when the changeover detection switch 63 is turned on, the detection signal at the detection terminal 64a becomes high level.

The output terminal of the comparator 50 is connected to one input terminal of an AND circuit 65.
The other input terminal of is connected to the output terminal of the OR circuit 66 and, via the inverter circuit 67, to the reset input terminal R of the flip-flop circuit 68. In the flip-flop circuit 68, the set input terminal S is connected to the output terminal of the AND circuit 65, and the set output terminal Q is connected to the drive circuits 69 and 70. In this case, the drive circuits 69 and 70 receive a high level signal, and when received, the compressor 41 and the condenser fan device 71 are operated. The output terminal of the comparator 52 is connected to a first input terminal of an OR circuit 66 and also to one input terminal of an OR circuit 72. In this OR circuit 72, the other input terminal has a flip-flop circuit 68.
A set output terminal Q of is connected via an inverter circuit 73, and an output terminal is connected to a drive circuit 74. In this case, the drive circuit 74 operates the h-room fan device 31 when a high-level signal is applied. The output terminal of the comparator 54 is connected to one input terminal of an AND circuit 75 and an OR circuit 76, respectively. Also, the detection terminal 6 of the middle chamber switching detection circuit 62
2a is the other input terminal of the OR circuit 76 and the AND circuit 7
7 and is also connected to the other input terminal of AND circuit 75 via an inverter circuit 78 . Further, the output terminal of the comparator 58 is connected to the other input terminal r- of the AND circuit 77.

Further, the output terminal r of the AND circuit 75 is connected to the second input terminal of the OR circuit 66, and the output terminal of the OR circuit 76 is connected to one input terminal of the OR circuit 79. The input terminal of is connected to the output terminal of the inverter circuit 73. The output terminals of the seven OR circuits and the AND circuit 77 are connected to drive circuits 80 and 81, respectively. In this case, the drive circuit 80 operates the middle room fan device 32 when a high level signal is given, and the drive circuit 81 starts the middle room heater 34 to generate heat when a high level signal is given. It is designed to let you do so. The output terminal of the comparator 56 is connected to each input terminal of an AND circuit 82 and an OR circuit 83. In addition, the detection terminal 64a of the right ventricular switching detection circuit 64 is connected to the input terminal of h° in addition to the OR circuit 83 and to the input terminal of one node j of the AND circuit 84. is connected to the other input terminal of Further, the output terminal of the comparator 60 is connected to the other input terminal of the AND circuit 84. Further, the output terminal of the AND circuit 82 is connected to the OR circuit 66.
The output terminal of the OR circuit 83 is connected to one input terminal of the OR circuit 86, and the other input terminal of the OR circuit 86 is connected to the output terminal of the inverter circuit 73. ing. The output terminals of the OR circuit 86 and the AND circuit 84 are connected to drive circuits 87 and 88, respectively. In this case, when the drive circuit 87 is given a high level signal, the right ventricular fan device 33
The drive circuit 88 is designed to operate the stone chamber heater 35 to generate heat when a high-level signal is applied.

Incidentally, as described above, the electric circuits shown in FIG. 1 constitute eight control circuits serving as control means.

Next, the operation of this embodiment will be explained with reference to FIG. 5.

(1) When both the middle chamber 25 and the right chamber 26, which are switching chambers, are switched to the cooling operation side (C, C).

C) In this case, the changeover detection switches 61 and 63 are off, and the detection terminals 62a and 64 of the changeover detection circuits 62 and 64 are turned off.
Both detection signals a are at low level. Further, when the temperature of the evaporator 30 detected by the evaporator temperature sensor 43 has not reached the lower limit set temperature, the output signal of the comparator 50 is at a high level. The left ventricle 2 detected by the cold temperature sensors 44, 45 and 46
4. When the temperature of the middle chamber 25 and right chamber 26 is not below the set temperature (3° C.), the outputs of the comparators 52, 54 and 56 are all at a high level. Therefore, the output signals of inverter circuits 78 and 85 both become high level, the output signals of AND circuits 75 and 82 both become 71-level, the output signal of OR circuit 66 becomes high level, and the output signal of AND circuit 65 becomes high level. The signal becomes high level, the flip-flop circuit 68 is set, and the output signal of the set output terminal Q becomes high level. As a result, the drive circuits 69 and 70 receive high level signals and operate the compressor 41 and the condenser fan device 71. Further, the high level output signal of the comparator 52 is given to the drive circuit 74 via the OR circuit 72, and the high level output signal of the comparator 54 is given to the drive circuit 8 via the OR circuits 76 and 79.
0, and the high level output signal of comparator 56 is applied to drive circuit 87 via OR circuits 83 and 86. Therefore, drive circuits 74, 80 and 87
The fan devices 31, 32, and 33 for the left chamber, middle chamber, and stone chamber are operated. As a result, the cold air from the evaporator 30 is transferred to the left ventricle 24. The air is supplied to the middle chamber 25 and right chamber 26, and cooling operation of each chamber 24, 25 and 26 is performed. Thereafter, when the temperature of the left ventricle 24, middle chamber 25 or right ventricle 26 falls below the set temperature amount, the output signal of the comparator 52, 54 or 56 becomes low level, so the input signal of the drive circuit 74, 80 or 87 becomes low level. Therefore, the fan device 31.
32 or 33 will be stopped. Thereafter, by repeating the same operation, the left ventricle 24. Right ventricle 25 and right ventricle 2
The temperature at No. 6 is controlled to approximately the set temperature (for example, 3° C.) as indicated by the rOJ mark in FIG.

After that, for example, even if the evaporator temperature sensor 43 reaches the upper limit set temperature and the output signal of the comparator 5o becomes low level, at this time the cold temperature sensor 4
4, 45 and 46 detect the left ventricle 24. When the temperature of either the middle chamber 25 or the right ventricle 26 is not lower than the set 23 degrees Celsius, the output signal of one of the comparators 52, 54 and 56 is at a high level. Therefore, the output signal of the OR circuit 66 is at a high level, and accordingly, the output signal of the inverter circuit 67 is at a low level, the flip-flop circuit 68 is maintained in the set state, and the compressor 41 continues to operate. Then, left ventricle 24. When the temperatures in the middle chamber 25 and right chamber 26 are all below the set temperature, AND circuits 75 and 82
As the output signals of both become low level, the output signal of the reor circuit 66 becomes low level, the output signal of the inverter circuit 67 becomes high level, and the flip-flop circuit 68 is inverted to the reset state. As a result, the set output signal of the flip-flop circuit 68 becomes low level, and the drive circuits 69 and 70 stop the operation of the compressor 41 and fan device 71. Furthermore, when the set output signal of the flip-flop circuit 68 becomes low level, the output (, 1) of the inverter circuit 7'3 becomes high level.
, 7Q and 86 drive the fan devices 31, 32 and 33, thereby defrosting the evaporator 30.

After that, the temperature of the evaporator 3o detected by the evaporator temperature sensor 43 becomes the upper limit setting temperature (for example, 4
°C), the output signal of the comparator 50 becomes high level. Therefore, before or after that, the left ventricle 24. When the temperature of either the middle chamber 25 or the right chamber 26 exceeds the set temperature, the corresponding comparator 52
．． Since the output signal of 54 or 56 becomes high level,
The output signal of the OR circuit 66 becomes high level, the output signal of the AND circuit 65 becomes high level, the flip-flop circuit 68 is inverted to the set state again, and the operation of the compressor 41 and fan device 71 is started.

(II) The middle chamber 25 serving as the switching chamber is on the cooling operation side and the right chamber 26
is switched to the heating operation side (C, C.

H) In this case, the changeover detection switch 63 is on, and the detection signal at the detection terminal 64a of the changeover detection circuit 64 becomes high level. In this case, the compressor 41. The operations of the fan devices 31 and 32 are substantially the same as described above, and the light portion will be described above. That is, the switching detection circuit 64
When the detection signal becomes high level, this is the OR circuit 83
and 86 to the drive circuit 87, so that
The stone chamber fan device 33 is operated. Furthermore, since the high level detection signal of the switching detection circuit 64 is given to the AND circuit 84, when the temperature in the right chamber 26 detected by the stone chamber hot temperature sensor 48 is below the set temperature (for example, 55° C.), the comparator 6o output signal becomes high level. Therefore, the AND circuit 84 outputs a high level output signal due to the high level of both human power signals, and the drive circuit 88 energizes the right ventricular heater 35 to start the heat generating operation. As a result, the hot air from the right ventricular heater 35 is supplied into the right ventricle 26, and the heating operation of the right ventricle 26 is performed.Then, the temperature in the right ventricle 26 is set. When the temperature exceeds the temperature, the output signal of the comparator 60 becomes low level, and the heating operation of the stone chamber heater '35 is stopped.Hereafter, the stone chamber heater 35 is intermittently operated to generate heat in the same way, and the right chamber 26 is heated. , as shown by rXJ marks in FIG. 5, is controlled to approximately the set value temperature (eg, 55° C.).

In this case, the left ventricular fan device 31 and the middle chamber fan device 32 are also operated intermittently based on the detection of the left ventricular cold temperature sensor 44 and the middle chamber cold temperature sensor 45, so that the left ventricle 24 and the right ventricle 25 are also operated intermittently. The temperature will be controlled to approximately a set temperature (for example, 3° C.).

Then, when the temperatures in the left chamber 24 and the middle chamber 25 both fall below the set temperature, the output signals of the comparators 52 and 54 become low level, and at this time, the detection signal of the switching detection circuit 64 is high level and the inverter circuit 85 Since the output signal is at a low level, the AND circuit 75
The output signals of and 82 become low level, and as a result,
The output signal of the OR circuit 66 becomes low level. Therefore,
The output signal of the inverter circuit 67 becomes high level,
The flip-flop circuit 68 enters a reset state, and the operation of the compressor 41 and fan device 71 is stopped.

(III) The middle chamber 25 serving as the switching chamber is on the heating operation side and the right chamber 2
6 is switched to the cooling operation side (C, H.

C) In this case, the switching detection switch 61 is on, and the detection signal at the detection terminal T62a of the switching detection circuit 62 becomes high level. Therefore, as in the case of item (II) above, the mid-chamber fan device 32 is operated continuously, and the mid-chamber heater 34 is intermittently heated, as shown in FIG.
As shown by the mark Δ, the middle chamber 25 is at approximately the set temperature (for example, 5
The heating operation is controlled so that the temperature is 5°C), and the fan device 31
and 3'3 are operated intermittently, and the left ventricle 24 and the right ventricle 2
Cooling operation is performed to approximately a set temperature (for example, 3° C.).

According to this embodiment, the following effects can be obtained. That is, even if the right ventricle 26, which does not have the influence of hot air on the left ventricle 24, is heated, the left ventricle 24 and the middle ventricle 2
5, the fan devices 31 and 32 are independently operated intermittently based on the temperature detection No. 15 of the left ventricular cold l8 degree sensor 44 and the middle chamber cold temperature sensor 45, so that approximately the set temperature (for example, 3 degrees Celsius) is maintained. ), unlike the conventional method, the temperature of the medium ¥25 does not become significantly higher than the set temperature. In this case, the operation of the compressor 30 is stopped when the temperature of both the left chamber 24 and the middle chamber 25 reach a set temperature or below, regardless of the temperature of the right chamber 26 in the heating operation, so that the refrigeration cycle I won't let you run your car in vain. Furthermore, the middle chamber 25 is heated and the right ventricle 2 is heated.
Even when the left ventricle 24 and the right ventricle 26 are in cooling operation.
is controlled by the temperature signals detected by the left ventricular cold temperature sensor 44 and the right ventricular cold temperature sensor 46.
Even if the size of the left ventricle 24 and the right ventricle 26 are different from each other, it is possible to control both to approximately the set temperature (for example, 3° C.).

In the above embodiment, the left ventricle 24. The middle chamber 25 and the right ventricle 26, which are two of the three chambers, are used as switching chambers, but the switching chamber is not limited to this.
It can also be applied to a case where the rooms (m-0 to n) are switching rooms, and even in this case, the compressor is stopped when all rooms other than the one that is being heated reach the set temperature. All you have to do is let it happen.

[Effects of the Invention] As explained above, the vending machine of the present invention is capable of independently controlling the temperature of cooling of the remaining chambers when at least one of the three or more chambers is in heating operation. At the same time, the compressor is stopped when the temperature in all remaining rooms reaches approximately the set temperature, so the temperature in the room being cooled can be reliably controlled to approximately the set temperature. It has excellent effects.

[Brief explanation of the drawing]

1 to 5 show one embodiment of the present invention, FIG. 1 is a configuration diagram of a control circuit, FIG. 2 is a cross-sectional view of the whole, and FIG. 3 is a vertical cross-sectional view of one machine room. Fig. 4 is a diagram corresponding to Fig. 3 in different working states, and Fig. 5 is a temperature diagram for explaining the action.
FIG. 6 and FIG. 7 are the same drawings as FIG. 2 and FIG. 5 showing the conventional example. In the drawing, 21 is the main body, 24 is the left ventricle, 25 is the middle chamber, 26 is the right ventricle, 27 to 29 are the machine rooms, 30 is the evaporator, 3
1 to 33 are fan devices, 34 and 35 are heaters, 41
1 is a compressor, 43 to 48 are tolerance sensors, 1 and 63 are switching detection switches, and 9 is a control circuit (control means).

Claims (1)

[Claims] 1. A main body whose interior is partitioned into three or more chambers, at least one of which is a switchable cooling and heating chamber, an evaporator of a refrigeration cycle for cooling each chamber, and the switchable There are heaters for heating the chambers, and those for the cooling side that are provided for each of the chambers supply the cold air from the evaporator to that chamber, and the heaters for the heating side that supply the cold air from the heater to that chamber. A fan device that supplies hot air, a temperature sensor that detects the temperature of each of the chambers, and a control means that controls the compressor, fan device, and heater of the refrigeration cycle based on temperature detection signals from these temperature sensors. When the switchable chamber is switched to heating, the control means operates a heater and a fan device corresponding to the switchable chamber, and
The fan devices corresponding to the remaining chambers are independently operated intermittently so that each chamber reaches approximately the set temperature, and the compressor is configured to stop operating when the remaining chambers all reach approximately the set temperature. A vending machine characterized by: