JP3184391B2 - Vending machine control device - 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 control apparatus for adjusting the return amount of oil by detecting the system temperature and pressure of a vending machine which sells the product by cooling or heating the product. Things.

[0002]

2. Description of the Related Art As disclosed in Japanese Patent Application Laid-Open No. Sho 60-23271, a conventional vending machine control device adjusts the internal temperature of a refrigerator according to a set temperature of a thermostat.

Hereinafter, an example of a conventional vending machine control device will be described with reference to the drawings.

As shown in FIG. 1, in a vending machine, a first storage room 2A dedicated to cooling and a second storage room 2B both used for cooling and heating are provided inside a vending machine main body 1 having heat insulating walls.
A first cooler 3A connected to the refrigerator 6 by a pipe and a corresponding first in-compartment fan motor 4A are provided at a lower portion in the first storage room 2A. A second cooler 3B connected to the refrigerator 6 via a solenoid valve 8,
And the corresponding second internal fan motor 4B and the heater 10 are arranged.

Next, the electric circuit of the control device will be described with reference to FIG. 8. Both ends of a first internal fan motor 4A and a second internal fan motor 4B are connected to a power source.
The first cooling thermostat 5A has one end connected to the power supply, the other end connected to one end of the refrigerator 6, and the other end of the refrigerator 6 connected to the power supply. Common terminal 7 of cold / hot changeover switch 7
a is connected to a power supply, one terminal 7b is connected to one end of an electromagnetic valve 8 via a second cooling thermostat 5B, and the other end of the electromagnetic valve 8 is connected to a power supply. The other terminal 7c of the switch 7 is connected to one end of a heater 10 via a heating thermostat 9, and the other end of the heater 10 is connected to a power supply.

The cooling system circuit will be described with reference to FIG. 9. The cooling system circuit through which the refrigerant flows includes the condenser 11, the first capillary 12A,
And a circuit returning to the refrigerator 6 via the first cooler 3A, and the condenser 11, the solenoid valve 8, and the second capillary 12 from the refrigerator 6.
B and a circuit returning to the refrigerator 6 via the second cooler 3B are formed.

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

First, when the second storage chamber 2B is in the cooling setting state, the cooling / temperature changeover switch 7 is set to the terminal 7b.
Is closed, and in the first storage chamber 2A, the refrigerator 6 is controlled by on / off control of the first cooling thermostat 5A, and in the second storage chamber 2B, the second cooling thermostat 5B is turned on / off. Under the control, the solenoid valve 8 is controlled and operated. Therefore, as a cooling system circuit through which the refrigerant flows, a circuit returning from the refrigerator 6 to the refrigerator 6 via the condenser 11, the first capillary 12A, and the first cooler 3A;
A circuit returning to the refrigerator 6 via the condenser 11, the solenoid valve 8, the second capillary 12B, and the second cooler 3B is formed, and both the first storage chamber 2A and the second storage chamber 2B are cooled. Is done.

Next, when the second storage chamber 2B is set to the heating setting, the cold / hot changeover switch 7 is connected to the terminal 7c.
Is closed, the refrigerator 6 is controlled by the on-off control of the first cooling thermostat 5A in the first storage chamber 2A, and the on-off control of the heating thermostat 9 in the second storage chamber 2B. The heater 10 is controlled. Therefore, as a cooling system circuit through which the refrigerant flows, the condenser 11, the first capillary 12A, and the first
A circuit that returns to the refrigerator 6 via the cooler 3A is formed,
Since the solenoid valve 8 is not energized, the refrigerant does not flow through the second cooler 3B, so that the cooling operation is performed in the first storage room 2A and the heating operation is performed in the second storage room 2B.

Note that the first internal fan motor 4A and the second internal fan motor 4B are continuously operated in any of the above cases.

[0011]

In the conventional vending machine control device, when the second storage chamber 2B is set to the heating setting, the oil mixed with the refrigerant and circulated in the cooling system circuit is used. Is left in the second cooler 3B, and as a result, the amount of oil in the refrigerator 6 is reduced, which causes a problem. Further, when the refrigerator 6 is operated due to the pressure difference, there is also a problem that the oil taken in and remaining inside flows backward from the outlet side of the second cooler 3B, thereby causing an oil pool. Was.

The present invention is directed to a vending machine control apparatus in which oil is not taken in and left in a cooler in a storage room for a product storage room for both heating and cooling operations, even when the storage room is set to a heating setting. The purpose is to provide.

[0013]

In order to achieve the above object, in a vending machine control device according to the present invention, an electromagnetic valve is supplied to a cooler for cooling a storage room for cooling or heating and storing a product. A detection sensor that detects the on-off state of the refrigerator that supplies the refrigerant and sends a signal, a timer that counts the time by receiving the signal from the detection sensor, and a time period in which the counting time of the timer is arbitrarily set by setting means. And a control means for controlling the solenoid valve in accordance with a signal from the arithmetic processing unit.

A temperature detecting means for detecting a surface temperature of the refrigerator; and an arithmetic processing for setting and comparing a predetermined time of a timer by comparing the temperature detected by the temperature detecting means with a predetermined temperature set in advance. It is provided with a part.

Further, first pressure detecting means for detecting the pressure at the outlet of the refrigerator, second pressure detecting means for detecting the pressure in the cooler, the first pressure detecting means and the second pressure An arithmetic processing unit is provided for comparing the pressure detected by the detection means with a predetermined pressure set in advance and setting and comparing a predetermined time of a timer.

Further, an oil level detecting means for detecting the level of the oil level inside the refrigerator and an oil level height detected by the oil level detecting means are compared with a predetermined numerical value. An arithmetic processing unit is provided for setting and comparing a predetermined time of a timer.

[0017]

According to the present invention having the above-described structure,
When oil accumulates in the refrigerator, the solenoid valve is opened for a certain period of time by supplying a refrigerant by detecting the on / off state of the refrigerator and comparing it with a time arbitrarily set by the setting means from a processing unit. Then, the oil can be washed out and the oil pool can be eliminated.

Further, the optimal opening time of the solenoid valve can be set by the temperature detecting means for detecting the surface temperature of the refrigerator, and the influence on the heating performance can be minimized.

Further, the first opening time of the solenoid valve can be set optimally by the first pressure detecting means and the second pressure detecting means for detecting the pressure in the cooling system.

Further, the optimum opening time of the solenoid valve can be set by the oil level detecting means for detecting the oil level inside the refrigerator.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A control device for a vending machine according to a first embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show a control device for a vending machine according to a first embodiment of the present invention. The same components as those of the conventional example are denoted by the same reference numerals. The description is omitted.

In FIG. 2, reference numeral 13 denotes a detection sensor for detecting the on / off control of the refrigerator 6 and sending a signal, 14 denotes a timer for counting the time by receiving a signal from the detection sensor 13, and 15 denotes a reference to the timer 14. Setting means for setting the data A1, 16 an arithmetic processing section for performing comparison processing with the reference data A1 set by the setting means 15, 17 control means for controlling the operation of the solenoid valve 8 based on a signal from the arithmetic processing section 16 The control means 17 controls a first relay 22 for turning on and off a first contact 21 connected in series to the solenoid valve 8.

Reference numeral 18 denotes a temperature detecting means for detecting the surface temperature of the refrigerator 6, 19A a first pressure detecting means for detecting the pressure at the outlet of the refrigerator 6, and 19B a second pressure for detecting the pressure in the cooler 3A. The detecting means 20 is an oil level detecting means for detecting the level of the oil level inside the refrigerator 6.

Next, the operation will be described. When the second storage chamber 2B is in the heating setting state, the terminal 7c of the cold / hot changeover switch 7 is closed, and in step 1 shown in FIG. h is set as the reference data A1. In step 2, the detection sensor 13 determines whether or not the refrigerator 6 is turned on.
Is turned off, and if it is on, the counting by the timer 14 is started in step 3, and in step 4, the solenoid valve 8 is turned on and opened. Next, in step 5,
If the time H counted by the timer 14 is not H ≧ h with respect to the time h of the set reference data A1, the solenoid valve 8
Is kept on, and if H ≧ h, the electromagnetic valve 8 is turned off in step 6 and the process is terminated.

As described above, according to the present embodiment,
When the second storage chamber 2B is in the heating setting state, the on / off state of the refrigerator 6 is detected by the detection sensor 13 and the electromagnetic valve 8 is opened for a certain period of time. Oil pools can be prevented.

The setting means 15 controls the timer 14
By changing the reference time h to be counted, the opening time of the solenoid valve 8 can be adjusted according to the installation environment and season of the vending machine.

Next, the operation of the vending machine control device according to the second embodiment of the present invention will be described with reference to FIGS. Note that the same components as those already described are denoted by the same reference numerals and description thereof will be omitted.

When the second storage chamber 2B is in the heating setting state, the terminal 7c of the cooling / temperature changeover switch 7 is closed, and in FIG. Sets the control temperature t1 to be detected as the reference data B1. In step 2, the detection sensor 13 determines whether or not the refrigerator 6 is on. If the refrigerator is not on, the solenoid valve 8 is turned off. If the refrigerator is on, step 3 is performed. so,
The counting by the timer 14 is started, and in step 4, the solenoid valve 8 is turned on to open. Next, in step 5, when the temperature TA detected by the temperature detecting means 18 is equal to or greater than the temperature t1 of the set data B1, TA ≧ t1, the time h1 counted by the timer 14 in step 6 is set in the data B1.
1 is set as C1, and in step 7, if the time H counted by the timer 14 is not H ≧ h1 with respect to the set time h1 of the data C1, the solenoid valve 8 is kept on, and If ≧ h1, in step 8, the electromagnetic valve 8 is turned off and the processing is terminated. In step 5, TA ≧ t1
If not, the time h2 counted by the timer 14 in step 9 is set as D1 in the data B1, and the counting time H by the timer 14 is set in step 10 to the time h2 of the set data D1. If H ≧ h2, the solenoid valve 8 is kept on, and if H ≧ h2, the solenoid valve 8 is turned off in step 8.

As described above, according to this embodiment, the surface temperature of the refrigerator 6 is detected by the temperature detecting means 18 and the counting time by the timer 14 is determined, whereby the optimal opening of the solenoid valve 8 is determined. Time is obtained and the second cooler 3
Oil can be prevented from accumulating in B.

Next, the operation of the vending machine control device according to the third embodiment of the present invention will be described with reference to FIGS. Note that the same components as those already described are denoted by the same reference numerals and description thereof will be omitted.

In FIG. 6, in step 1, the setting means 15 sets the difference between the pressures to be detected by the first pressure detecting means 19A and the second pressure detecting means 19B, that is, the control pressure P1, as reference data E1. . Step 2
Then, the detection sensor 13 determines whether or not the refrigerator 6 is turned on. If the refrigerator 6 is not turned on, the solenoid valve 8 is turned off. The counting by the timer 14 is started, and in step 4, the solenoid valve 8 is turned on. Next, in step 5, the first pressure detecting means 19A and the second pressure detecting means 19B
If the pressure difference PA-PB is PA-PB ≧ P1 with respect to the set reference pressure P1, the time h3 to be counted by the timer 14 in step 6 is set to the reference data F
1 and the time H counted by the timer 14 in step 7 is H ≧ h with respect to the set reference time h3.
If not, the solenoid valve 8 is kept on. If H ≧ h3, the solenoid valve 8 is turned off in step 8. In step 5, PA
If −PB ≧ P1, the time h4 to be counted by the timer 14 is set as the reference data G1 in step 9, and the time H counted by the timer 14 is set to the reference time in step 10. For G1, H ≧ h4
If not, the solenoid valve 8 is kept on, but if H ≧ h4, the solenoid valve 8 is turned off in step 8.

As described above, according to this embodiment, the first pressure detecting means 19A and the second pressure detecting means 19B
By detecting the pressure and determining the counting time of the timer 14, the optimal opening time of the solenoid valve 8 is obtained,
It is possible to prevent oil pools from forming in the second cooler 3B.

Next, the operation of the vending machine control device according to the fourth embodiment of the present invention will be described with reference to FIGS. Note that the same components as those already described are denoted by the same reference numerals and description thereof will be omitted.

In FIG. 7, in step 1, the setting means 15 sets the control height 11 of the oil level detecting means 20 as reference data H1. In step 2, the detection sensor 13 determines whether or not the refrigerator 6 is on. If the refrigerator is not on, the solenoid valve 8 is turned off. The counting by 14 is started, and in step 4, the solenoid valve 8 is turned on. Next, in step 5, with respect to the reference height l1 at which the height L1 by the oil level height detection means 20 is set,
If L1 ≧ l1, the time h5 counted by the timer 14 in step 6 is set as the reference data J1.
If the time H counted by the timer 14 is not H ≧ h5 with respect to the set time J1, the solenoid valve 8 is kept on, but if H ≧ h5, the solenoid valve 8 is turned on in step 8. Is turned off. In step 5, L1 ≧
If not, in step 9 the timer 14
Is set to the reference data K1, and in step 10, the time H counted by the timer 14 is equal to the set time K.
If H ≧ h6 with respect to 1, the solenoid valve 8
Remains on, but if H ≧ h6, step 8
To turn off the solenoid valve 8.

As described above, according to this embodiment, the counting time of the timer 14 is determined by detecting the height of the oil level inside the refrigerator 6 by the oil level detection means 20 to determine the optimal time. Opening time of the solenoid valve 8 is obtained.
Oil can be prevented from accumulating in the cooler 3B.

[0037]

Since the present invention is configured as described above, it has the following effects.

A storage room provided in the main body for cooling or heating and storing a product, a cooler for cooling the storage room, a heater for heating the storage room, and a refrigerator for supplying a refrigerant to the cooler; An electromagnetic valve for controlling the flow of the refrigerant, a thermostat for controlling the temperature of the storage chamber, an in-compartment fan motor for stirring the air in the storage chamber, and a signal for detecting the on-off state of the refrigerator to generate a signal. A detection sensor for sending, a timer for counting the time by receiving a signal from the detection sensor, an arithmetic processing unit for comparing the counting time of the timer with a time arbitrarily set by the setting means, and a signal from the arithmetic processing unit. Since the control means controls the solenoid valve, it is possible to eliminate the accumulation of oil in the cooler by flowing the refrigerant through the cooler for a certain time during the operation of heating and cooling. The ability.

The timer can be operated effectively by setting the counting time of the timer to an optimum counting time by means of the temperature detecting means, the pressure detecting means and the oil level detecting means.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view showing a control device of a vending machine.

FIG. 2 is a block diagram of a vending machine control device according to an embodiment of the present invention.

FIG. 3 is a system diagram of a vending machine control device according to an embodiment of the present invention.

FIG. 4 is a flowchart of a vending machine control device according to the first embodiment of the present invention.

FIG. 5 is a flowchart of a control device for a vending machine according to a second embodiment of the present invention.

FIG. 6 is a flowchart of a vending machine control device according to a third embodiment of the present invention.

FIG. 7 is a flowchart of a vending machine control device according to a fourth embodiment of the present invention.

FIG. 8 is an electric circuit diagram of a conventional vending machine control device.

FIG. 9 is a system diagram of a conventional vending machine control device.

[Explanation of symbols]

 2A first storage room 2B second storage room 3A first cooler 3B second cooler 6 refrigerator 8 solenoid valve 13 detection sensor 14 timer 15 setting means 16 arithmetic processing unit 17 control means 18 temperature detection means 19A first pressure detection Means 19B Second pressure detecting means 20 Oil level high detecting means

Continuation of the front page (56) References JP-A-56-117074 (JP, A) JP-A-62-169987 (JP, A) JP-A-1-306989 (JP, A) (58) Fields studied (Int .Cl. ⁷ , DB name) G07F 9/10 F25D 23/12

Claims (5)

(57) [Claims] 1. A detection sensor for detecting the on-off state of a refrigerator for supplying a refrigerant to a cooler in a high-temperature storage chamber via an electromagnetic valve and transmitting a signal, and counting a time by receiving the signal from the detection sensor. A vending machine control comprising a timer, an arithmetic processing unit for comparing the counting time of the timer with a predetermined time set in advance, and control means for controlling the solenoid valve by a signal from the arithmetic processing unit apparatus. 2. The vending machine control device according to claim 1, further comprising setting means for arbitrarily setting a time for sending a signal from a timer. 3. A temperature detecting means for detecting the surface temperature of the refrigerator, and an arithmetic processing for comparing the temperature detected by the temperature detecting means with a predetermined temperature, and setting and comparing a predetermined time of a timer. The control device for a vending machine according to claim 1, further comprising a unit. 4. A first pressure detecting means for detecting a pressure at a refrigerator outlet, a second pressure detecting means for detecting a pressure in a cooler, the first pressure detecting means, and the second pressure. 2. The vending machine control device according to claim 1, further comprising an arithmetic processing unit that compares the pressure detected by the detection unit with a predetermined pressure set in advance and sets and compares a predetermined time of a timer. 5. An oil level detecting means for detecting the height of the oil level inside the refrigerator, and comparing the oil level height detected by the oil level detecting means with a predetermined numerical value,
2. The vending machine control device according to claim 1, further comprising an arithmetic processing unit for setting and comparing a predetermined time of a timer.