JP5266960B2 - vending machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the operation factor of a compressor by preventing a coolant from flowing into an evaporator in a high-flow-rate chamber when the compressor is stopped, to increase a flow rate of a coolant flowing into an evaporator in a low-flow-rate chamber by an amount accumulated in the evaporator in the high-flow-rate chamber, thereby reducing cooling time. <P>SOLUTION: In a vending machine 11 having a cooling mode and a warming mode, a solenoid valve single opening/closing control means 112 closes, when the compressor 103 stops, a solenoid valve 102a in the high-flow-rate chamber and opens a solenoid valve 102b in the low-flow-rate chamber for a predetermined period to make a pressure balance. The operation factor of the compressor 103 can be reduced by preventing a coolant from flowing into the evaporator 101a in the high-flow-rate chamber when the compressor 103 is stopped, and by increasing the coolant flow rate into the evaporator 101b in the low-flow-rate chamber by an amount accumulated in the evaporator 101a in the high-flow-rate chamber, thereby reducing the cooling time. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention relates to control of a solenoid valve of a vending machine.

Conventionally, this type of vending machine controls each solenoid valve sequentially and independently so that the degree of superheat in each evaporator becomes a predetermined value (see, for example, Patent Document 1).

Figure 10 shows the conventional automatic vending machine described in Patent Document 1. As shown in FIG. 10, the interior of the warehouse is partitioned into three warehouses, a left warehouse 1 </ b> A, a middle warehouse 1 </ b> B, and a right warehouse 1 </ b> C via a heat insulating material 7. In the present embodiment, the left store 1A is configured as a store for selling cold drinks throughout the year, and the center store 1B and the right store 1C are configured as stores for selling cold drinks or hot drinks according to the season. That is, only the evaporator 2A as a cooler is arranged in the left warehouse 1A, whereas the evaporators 2B and 2C and heaters 12B and 12C as heaters are arranged in the middle warehouse 1B and the right warehouse 1C, respectively. Is done.

  The evaporators 2A to 2C arranged in the respective cabinets 1A to 1C are respectively connected in parallel to a compressor (compressor) 3 and a condenser 4 arranged outside the cabinet, and a refrigeration circuit for cooling the inside of the respective cabinets 1A to 1C is provided. Composed. Electronic expansion valves 15A, 15B, and 15C are provided as flow rate adjusting means between the condenser 4 and the evaporators 2A to 2C, respectively. Each of the electronic expansion valves 15A to 15C is provided with pulse motors (or stepping motors) 16A, 16B and 16C, and pulse motors 16A to 16C driven based on a pulse signal supplied from the control means 20 as will be described later. Thus, the opening degree of the electronic expansion valves 15A to 15C is adjusted.

  The inlet side temperature sensors 17A, 17B, and 17C and the outlet side temperature sensors 18A, 18B, and 18C for detecting the temperature of the refrigerant are respectively installed in the pipe portions of the inlets and outlets of the evaporators 2A to 2C. The outputs of these temperature sensors 17A-17C and 18A-18C are supplied to the control means 20, and the temperature difference of the refrigerant at the inlet / outlet of the evaporator, that is, the degree of superheat, is calculated for each of the evaporators 2A-2C.

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

  In FIG. 11, after the compressor 3 is started, first, the first step of supplying the refrigerant to each of the evaporators 2A to 2C is performed in a state where the opening degree of each of the electronic expansion valves 15A to 15C is fixed to a predetermined opening degree. Step S1). At this time, the opening degree of each of the electronic expansion valves 15A to 15C is fixed to a predetermined opening ratio with respect to the total opening degree of all the electronic expansion valves, and the total of these opening degrees is the refrigerant at the outlet of the condenser 4. Determined based on temperature. This refrigerant temperature is detected by a temperature sensor 19 installed in the outlet side piping portion of the condenser 4.

  The predetermined opening ratio of each of the electronic expansion valves 15A to 15C described above is determined by the ideal simulation result of the refrigerating capacity of each of the evaporators 2A to 2C calculated in advance. This takes into consideration the fact that the form of the evaporator is determined from the volume in the warehouse, the number, shape, size, etc. of the goods to be accommodated. Further, the total opening degree of the electronic expansion valves 15 </ b> A to 15 </ b> C is determined as a function of the refrigerant temperature at the outlet of the condenser 4. As a tendency, when the outlet temperature of the condenser 4 is high (the outside temperature and the refrigerant pressure are high), the total opening degree is reduced, and conversely, when the outlet temperature is low (the outside temperature and the refrigerant pressure is low), the opening degree is total. Increase

  When all the cabinets 1A to 1C reach the set temperature R, the operation of the compressor 3 is stopped. The compressor 3 is stopped after a predetermined time t (for example, 60 seconds) has elapsed after the compressor operation time tc counted after the fully-closed operation of the electronic expansion valve whose opening degree has been controlled to the end is performed. (Steps S7 and S8).

Thereby, the residual refrigerant in each of the evaporators 2A to 2C can be removed, the responsiveness of the superheat degree of the refrigerant can be improved when the compressor 3 is restarted, and the cooling efficiency can be increased. It is possible to reduce the power consumption and to save energy.
JP 2001-165547 A

  However, in the above conventional configuration, the refrigerant flow from the evaporator 2A of the left warehouse 1A to the evaporator 2B of the middle warehouse 1B is designed to be reduced, the left warehouse 1A and the middle warehouse 1B are set to be cooled, and the right warehouse 1C is When heating is set, the electronic expansion valve 15A of the left warehouse 1A and the electronic expansion valve 15B of the middle warehouse 1B are opened after the compressor 3 (compressor) is stopped.

  When the electronic expansion valve 15A and the electronic expansion valve 15B in the refrigerator are opened while the compressor 3 is stopped, the refrigerant flows into the evaporator 2A and the evaporator 2B, and the compressor 3 is stopped. Therefore, the evaporator 2A and the evaporator The pressure of 2B cannot be maintained at a pressure at which the refrigerant can evaporate, and all the refrigerant that has flowed in cannot be evaporated and accumulates in the evaporator 2A and the evaporator 2B. The amount of refrigerant that accumulates in the evaporator 2A and the evaporator 2B is larger in the evaporator 2A in the warehouse having a larger refrigerant flow rate than in the evaporator 2B in the warehouse having a smaller refrigerant flow rate.

  Then, after the next start of the compressor 3, the refrigerant flow rate of the evaporator 2 </ b> B in the warehouse having a small refrigerant flow rate is reduced by the amount accumulated in the evaporator 2 </ b> A in the cabinet having a large refrigerant flow rate.

  As a result, the refrigerant flow rate of the evaporator 2B in the warehouse, which originally has a low refrigerant flow rate, further decreases, resulting in a problem that the cooling time in the warehouse becomes longer and the operation rate of the compressor 3 increases.

  The present invention solves the above-described conventional problem, and while the compressor is stopped, does not flow the refrigerant to the evaporator in the warehouse with a large refrigerant flow rate, The purpose is to reduce the cooling time and reduce the operating rate of the compressor by increasing the amount of refrigerant accumulated in the evaporator.

Above to solve the conventional problems, an automatic vending machine of the present invention, a compressor has a plurality of evaporators and the inside temperature detection thermistor in a provided compartment that constitutes a circuit through which the refrigerant flows with a condenser, The evaporators in each chamber are connected in parallel, and a solenoid valve is connected to the refrigerant inflow side of each evaporator with respect to each of the evaporators, and the chamber temperature detection thermistor in the chamber set for cooling is finished cooling. When it is detected that the temperature has reached the cooling end temperature, the solenoid valve is closed so that the refrigerant does not flow into the evaporator at the cooling end temperature, and all the solenoid valves corresponding to the cooling set inside are closed. Opening the solenoid valve of the evaporator with the lower refrigerant flow rate with the cooling setting while maintaining the closed state of the solenoid valve of the evaporator with the higher refrigerant flow rate with the cooling setting after stopping the compressor To make it happen.

  As a result, when the compressor is stopped, the refrigerant is not allowed to flow to the evaporator in the warehouse having a high refrigerant flow rate, and the refrigerant flow rate to the evaporator in the warehouse having a low refrigerant flow rate is accumulated in the evaporator in the warehouse having a high refrigerant flow rate. It can be increased by the amount that you had.

The vending machine of the present invention does not flow the refrigerant to the evaporator in the warehouse with a large refrigerant flow rate while the compressor is stopped, and the refrigerant flow rate to the evaporator in the warehouse with a small refrigerant flow rate It is possible to reduce the cooling time and the operation rate of the compressor by increasing the amount accumulated in the evaporator.

The invention according to claim 1 has a plurality of interiors provided with a compressor and a condenser and a evaporator in which a refrigerant flows and a temperature detection thermistor in the storage, and the evaporators in each storage are in parallel. When the solenoid valve is connected to the refrigerant inflow side of the evaporator with respect to each of the evaporators, and the inside temperature detection thermistor in the inside of the cooling set detects that the cooling end temperature has been reached. When the solenoid valve is closed so that the refrigerant does not flow into the evaporator in the refrigerator when the temperature is at the end of cooling, and when all the solenoid valves corresponding to the cooling chamber are closed, the compressor is stopped before cooling. The solenoid valve of the evaporator with the smaller refrigerant flow rate is opened with the cooling setting while maintaining the closed state of the electromagnetic valve of the evaporator with the larger refrigerant flow rate in the setting , and the compressor is stopped Cool down the evaporator in the cabinet with a large refrigerant flow rate. Is not allowed to flow in, the refrigerant flow rate to the evaporator in the warehouse with a low refrigerant flow rate can be increased by the amount accumulated in the evaporator in the warehouse with a high refrigerant flow rate, and the cooling time is shortened and the compressor The operating rate can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, when all the solenoid valves corresponding to the interior of the cooling setting are closed, the compressor is stopped and then the refrigerant flow rate with the lower cooling setting is set. Only the solenoid valve of the evaporator is opened for a predetermined time.

According to a third aspect of the present invention, in the first aspect of the invention, when all of the solenoid valves corresponding to the interior of the cooling setting are closed, the compressor is stopped and then the refrigerant flow rate with the lower cooling setting is set. Only the solenoid valve of the evaporator repeats the opening operation and the closing operation alternately a predetermined number of times.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, when the compressor is stopped, the electromagnetic valve of the evaporator having the larger refrigerant flow rate in the cooling setting is closed. To maintain.

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

(Embodiment 1)
FIG. 1 is a configuration diagram of a cooling system for a vending machine according to Embodiment 1 of the present invention. FIG. 2 is a configuration diagram of the vending machine according to the first embodiment of the present invention. 3, 4 and 5 are flowcharts showing the operation of the vending machine according to the first embodiment of the present invention.

  In FIG. 1, the interior of the vending machine 11 of the present invention is partitioned into an interior 1 (in the left compartment), an interior 2 (inside the interior), and an interior 3 (in the right compartment). In the present embodiment, the interior 1 is configured as a store that sells cold drinks throughout the year, and the interior 2 and the interior 3 are configured as stores that sell cold drinks or hot drinks according to the season. That is, only the evaporator 101a as a cooler is disposed in the interior 1, whereas the interior 2 and the interior 3 are respectively an evaporator 101b, an evaporator 101c, a heater 105a as a heater, and a heater. 105b is arranged. The evaporator 101a, the evaporator 101b, and the evaporator 101c disposed in the interior 1, the interior 2, and the interior 3 are respectively connected in parallel to the compressor 103 and the condenser 104 that are disposed outside the interior, and the electromagnetic valve 102a. The solenoid valve 102b and the solenoid valve 102c are connected to the evaporator 101a, the evaporator 101b, and the evaporator 101c, respectively, cool the interior 1, the interior 2 and the interior 3 and heat the interior 2 and the interior 3 It is the composition to do.

  In FIG. 2, the main controller 100 includes an electromagnetic valve 102a, an electromagnetic valve 102b, an electromagnetic valve 102c, a compressor 103, a heater 105a / heater 105b, an internal temperature detection thermistor 106, and an electromagnetic valve opening / closing control means 111 ( Pressure balance means). Further, the solenoid valve opening / closing control means 111 is constituted by a solenoid valve single opening / closing control means 112 and a solenoid valve multiple opening / closing control means 113.

  Here, the configuration of the solenoid valve single opening / closing control means 112 will be described. The single solenoid valve opening / closing control means 112 includes an internal refrigerant flow rate determination unit 112a, a solenoid valve opening time setting unit 112b, a compressor stop time counting unit 112c, and a solenoid valve opening time counting unit 112d.

  Next, the operation of each component of the single solenoid valve opening / closing control means 112 will be described. Each in-compartment refrigerant flow rate determination unit 112a determines whether or not the in-compartment has a large refrigerant flow rate from the cold temperature setting in each in-compartment. For example, it is assumed that the interior 1 and the interior 2 are cooling settings, and the interior 3 is heating settings. In addition, the vending machine 11 has a smaller refrigerant flow rate from the evaporator 101a in the warehouse 1 to the evaporator 1b in the warehouse 2. It is determined that the inside 1 is a cooling setting and is in the left compartment so that the refrigerant flow rate is large, and the inside 2 is a cooling setting but is in the middle compartment, so that the refrigerant flow rate is small. Since the inside 3 is a heating setting, the refrigerant flow rate is not determined. The electromagnetic valve opening time setting unit 112b sets a time during which the electromagnetic valve 102a, the electromagnetic valve 102b, and the electromagnetic valve 102c are opened while the compressor 103 is stopped. The electromagnetic valve opening time in the chamber with a large refrigerant flow rate at the cooling setting is set to zero, and the electromagnetic valve opening time in the chamber with a small refrigerant flow rate at the cooling setting is set to a predetermined time. In the heating setting chamber, the solenoid valve opening time is set to zero regardless of the refrigerant flow rate. In addition, although the refrigerant | coolant flow volume was determined from cold temperature setting, it is not limited to this. The compressor stop time counting unit 112c counts the time during which the compressor 103 is stopped. The electromagnetic valve open time counting unit 112d counts the time during which the electromagnetic valve 102a, the electromagnetic valve 102b, and the electromagnetic valve 102c are open while the compressor 103 is stopped.

-Compartment 1 and-compartment 2 is cooled set as described above, with the vending machine 11 of the present embodiment the internal 3 is set warming following the operation, the operation.

  An outline of the operation will be described with reference to FIG.

  First, after the internal temperature detection thermistor 106 reaches the cooling end temperature and the compressor stops (step 1), each internal refrigerant flow rate determination unit 112a determines the refrigerant flow rate in each internal chamber and sets the solenoid valve opening time. The unit 112b determines the opening time of the solenoid valve 102a, the solenoid valve 102b, and the solenoid valve 102c while the compressor 103 is stopped (step 2). Then, opening / closing control of the solenoid valve 102a, solenoid valve 102b, and solenoid valve 102c is performed (step 3).

  In FIG. 4, the operation of setting the solenoid valve opening time (step 2) will be described.

  After the internal temperature detection thermistor 106 reaches the cooling end temperature and the compressor stops (step 1), the compressor stop time counting unit 112c starts measuring the time when the compressor 103 is stopped (step 21). .

  A coefficient i representing the number in the cabinet is initialized to 1 (step 22). Here, as for the coefficient i, 1 is left, 2 is middle, and 3 is right. That is, the interior 1 is the left compartment, the interior 2 is the middle compartment, and the interior 3 is the right compartment.

  Each in-compartment refrigerant flow rate determination unit 112a determines the refrigerant flow rate in the in-compartment 1 (step 23 and step 24). The inside 1 is a cooling setting, and since it is at the end of the three insides, it is determined that the inside of the compartment has a large refrigerant flow rate. The electromagnetic valve opening time setting unit 112b sets the opening time of the electromagnetic valve 102a to zero while the compressor 103 is stopped because the inside 1 is inside the compartment having a large refrigerant flow (step 26).

  The same processing as in the storage 1 is performed in the storage 2 and the storage 3.

  Each in-compartment refrigerant flow rate determination unit 112a determines the refrigerant flow rate in the in-compartment 2 (Step 23 and Step 24). The inside 2 is a cooling setting, and since it is in the middle of the three insides, it is determined that the inside of the compartment has a small refrigerant flow rate. The electromagnetic valve opening time setting unit 112b sets the opening time of the electromagnetic valve 102b to a predetermined time (for example, 5 min) while the compressor 103 is stopped because the inside 2 is in the inside having a small refrigerant flow rate (step 25).

  Each in-compartment refrigerant flow rate determination unit 112a determines the refrigerant flow rate in the in-compartment 3 (Step 23 and Step 24). Since the chamber 3 is heated, the electromagnetic valve opening time setting unit 112b sets the opening time of the electromagnetic valve 102c to zero while the compressor 103 is stopped regardless of the refrigerant flow rate (step 26).

  Next, referring to FIG. 5, the operation (step 3) of electromagnetic valve opening / closing control will be described.

  While the compressor 103 is stopped, the solenoid valve 102a in the left chamber (inside 1) and the solenoid valve 102c in the heating setting chamber (inside 3) having a large refrigerant flow rate are closed (step 31).

  When the compressor stop time reaches the solenoid valve operation start time (zero time indicating immediately after the compressor stops) (step 32), the solenoid valve 102b in the inner chamber (inside chamber 2) with a small refrigerant flow rate is opened (step 33). Then, measurement of the time during which the electromagnetic valve 102b is open is started (step 34). When the electromagnetic valve 102b is open for a predetermined time (for example, 5 minutes), the electromagnetic valve 102b is closed (steps 35 and 36), and the process is terminated.

  In addition, the electromagnetic valve operation start time in step 32 is not limited to immediately after the compressor is stopped. Further, the time during which the electromagnetic valve 102b is opened in step 32 is not limited to 5 minutes.

  As described above, in the present embodiment, the electromagnetic valve opening / closing control means 111 (pressure balance means) is replaced by the respective refrigerant flow rate determination unit 112a, electromagnetic valve open time setting unit 112b, compressor stop time counting unit 112c electromagnetic valve. The solenoid valve singular opening / closing control means 112 having an open time counting unit 112d is used as the solenoid valve singular opening / closing control means 112 in the vending machine 11 set for cooling and heating while the compressor 103 is stopped. By closing the solenoid valve 102a in the warehouse with a high refrigerant flow rate and opening the electromagnetic valve 102b in the cabinet with a low refrigerant flow rate for a predetermined time, the compressor 103 is stopped, The amount of refrigerant flow to the evaporator 101b in the warehouse with a small refrigerant flow rate is not accumulated in the evaporator 101a in the warehouse with a large refrigerant flow rate without causing the refrigerant to flow to the evaporator 101a. Only to shorten the cooling time by increasing it is possible to reduce the operation rate of the compressor 103.

  Further, in the present embodiment, the electromagnetic valve opening / closing control means 111 (pressure balance means) may be the electromagnetic valve multiple opening / closing control means 113.

  The configuration / operation / action / effect of the electromagnetic valve multiple opening / closing control means 113 will be described below. Here, the description of the same content as that of the single solenoid valve opening / closing control means 112 is omitted.

  The configuration of the electromagnetic valve multiple opening / closing control means 113 will be described.

  The electromagnetic valve multiple opening / closing control means 113 includes an internal refrigerant flow rate determination unit 112a, an electromagnetic valve opening / closing time setting unit 113b, an electromagnetic valve opening / closing time counting unit 113c, a compressor stop time counting unit 112c, and an electromagnetic valve opening / closing frequency counting unit 113d. It is configured.

  Next, the operation of each component of the electromagnetic valve multiple opening / closing control means 113 will be described.

  The electromagnetic valve opening / closing time setting unit 113b sets the opening time and closing time of the electromagnetic valve 102a, the electromagnetic valve 102b, and the electromagnetic valve 102c while the compressor 103 is stopped. Since the inside 1 is cooled and the refrigerant flow rate is large, the opening time of the electromagnetic valve 102a is set to zero and the closing time is set to a predetermined time. Since the inside 2 is a cooling setting and the refrigerant flow rate is small, the opening time and closing time of the electromagnetic valve 102b are set to predetermined times. Since the interior 3 is heated, the opening time of the solenoid valve 102c is set to zero and the closing time is set to a predetermined time regardless of the refrigerant flow rate. The electromagnetic valve opening / closing time counting unit 113c counts the time during which the electromagnetic valve 102a, the electromagnetic valve 102b, and the electromagnetic valve 102c are open and closed while the compressor 103 is stopped. The electromagnetic valve open / close count counter 113d counts the open / close frequency of the electromagnetic valve 102a, the electromagnetic valve 102b, and the electromagnetic valve 102c while the compressor 103 is stopped.

-Compartment 1 and-compartment 2 is cooled set as described above, with the vending machine 11 of the present embodiment the internal 3 is set warming following the operation, the operation.

  Since the processing up to the location where each refrigerant flow rate determination unit 112a determines the refrigerant flow rate is the same as that of the single solenoid valve opening / closing control means 112, the description thereof is omitted.

  The electromagnetic valve opening / closing time setting unit 113b sets the opening time of the electromagnetic valve 102a to zero and the closing time to a predetermined time (for example, 60 s) when the compressor 103 is stopped because the chamber 1 is in the chamber with a large refrigerant flow rate.

  The same processing as in the storage 1 is performed in the storage 2 and the storage 3.

  The electromagnetic valve opening / closing time setting unit 113b is configured such that the opening time of the electromagnetic valve 102b during the stop of the compressor 103 is a predetermined time (for example, 59 s) and the closing time is a predetermined time (for example, for example) 1s).

  The electromagnetic valve opening / closing time setting unit 113b sets the opening time of the electromagnetic valve 102c to zero during the stop of the compressor 103, and sets the closing time to a predetermined time (for example, 60 s), since the inside 3 is a heating setting inside.

  While the compressor 103 is stopped, the electromagnetic valve 102a in the cabinet 1 having a large refrigerant flow rate and the electromagnetic valve 102c in the heating setting chamber (3 in the cabinet) are closed.

  When the compressor stop time becomes the solenoid valve operation start time (zero time indicating immediately after the compressor stops), the solenoid valve 102b in the inner chamber (inside chamber 2) with a small refrigerant flow rate is opened for a predetermined time (for example, 59 seconds). Later, it is closed for a predetermined time (for example, 1 s). At this time, the solenoid valve opening time counting unit 112d counts the opening and closing of the solenoid valve once. The electromagnetic valve 102b is repeatedly opened and closed until this number reaches a predetermined number (for example, six times). When the predetermined number of times is reached, the electromagnetic valve 102b is closed and the process is terminated.

  The time for opening and closing the electromagnetic valve 102b is not limited to 59s and 1s.

  Further, the number of times of repeatedly opening and closing the electromagnetic valve 102b is not limited to six.

  Further, in the present embodiment, the electromagnetic valve opening / closing control means 111 (pressure balance means) is changed to each internal refrigerant flow rate determination section 112a, electromagnetic valve opening / closing time setting section 113b, electromagnetic valve opening / closing time counting section 113c, compressor stop time counting. The solenoid valve multiple opening / closing control means 113 includes a section 112c and a solenoid valve opening / closing count counting section 113d. The solenoid valve multiple opening / closing control means 113 is configured to stop the compressor 103 in the vending machine 11 set for cooling and heating. While closing the electromagnetic valve 102a in the warehouse with a large refrigerant flow rate, opening and closing the electromagnetic valve 102b in the warehouse with a small refrigerant flow rate for a predetermined time, and repeating this a predetermined number of times, While the compressor 103 is stopped, the refrigerant is not allowed to flow to the evaporator 101a in the cabinet having a large refrigerant flow rate, and the refrigerant to the evaporator 101b in the cabinet having a low refrigerant flow rate. Amounts, can be reduced to shorten the cooling time operation rate of the compressor 103 by increasing by the amount that has been accumulated in the evaporator 101b in busy refrigerant flow compartment. Furthermore, since there is time to close the electromagnetic valve 102b in the warehouse with a small refrigerant flow rate, energy saving can be realized correspondingly.

  In addition, this Embodiment is not limited to the vending machine 11 of a three-chamber machine, The inside of the store | warehouse | chamber with a small refrigerant | coolant flow volume is not limited to the inside store | warehouse | chamber.

(Embodiment 2)
FIG. 6 is a configuration diagram of the vending machine according to the second embodiment of the present invention. 7, 8, and 9 are flowcharts showing the operation of the vending machine according to the second embodiment of the present invention.

  In FIG. 6, the main controller 200 includes an electromagnetic valve 102a, an electromagnetic valve 102b, an electromagnetic valve 102c, a compressor 103, a heater 105a / heater 105b, an in-chamber temperature detection thermistor 106, and an electromagnetic valve delay opening / closing control means 211. (Pressure balance means). Further, the electromagnetic valve delay opening / closing control means 211 is constituted by an electromagnetic valve delay single opening / closing control means 212 and an electromagnetic valve delay multiple opening / closing control means 213.

  Here, the configuration of the electromagnetic valve delay single opening / closing control means 212 will be described.

  The solenoid valve delay single opening / closing control means 212 includes an internal refrigerant flow rate determination unit 112a, an electromagnetic valve opening time setting unit 112b, an electromagnetic valve delay time setting unit 212a, a compressor stop time counting unit 112c, and an electromagnetic valve opening time counting unit 112d. And an electromagnetic valve delay time counting unit 212b.

  Next, the operation of each component of the electromagnetic valve delay single opening / closing control means 212 will be described. Note that the description of the same components as those in Embodiment 1 is omitted.

  The electromagnetic valve delay time setting unit 212a sets a time from when the electromagnetic valve 102b in the warehouse having a small refrigerant flow rate is operated until the electromagnetic valve 102a in the warehouse having a high refrigerant flow rate is operated. The electromagnetic valve delay count unit 212b measures the time from the operation of the electromagnetic valve 102b in the warehouse having a low refrigerant flow rate to the operation of the electromagnetic valve 102a in the warehouse having a high refrigerant flow rate.

-Compartment 1 and-compartment 2 is cooled set as described above, with the vending machine 11 of the present embodiment the internal 3 is set warming following the operation, the operation.

  The outline of the operation will be described with reference to FIG. First, after the internal temperature detection thermistor 106 reaches the cooling end temperature and the compressor stops (step 1), each internal refrigerant flow rate determination unit 112a determines whether the internal refrigerant flow rate is large, For the solenoid valve 102a, solenoid valve 102b, and solenoid valve 102c, the time during which the compressor 103 is stopped and the solenoid valve in the chamber where the refrigerant flow rate is high after the solenoid valve in the chamber where the refrigerant flow rate is low are operated. The time until operating is set (step 4). Then, opening / closing control of the solenoid valve 102a, the solenoid valve 102b, and the solenoid valve 102c is performed (step 5).

  In FIG. 8, the operation of setting the solenoid valve opening time and the solenoid valve delay time in step 4 will be described. After the internal temperature detection thermistor 106 reaches the cooling end temperature and the compressor stops (step 1), the compressor stop time counting unit 112c starts measuring the time when the compressor 103 is stopped (step 21). .

  Each in-compartment refrigerant flow rate determination unit 112a determines the refrigerant flow rate in the in-compartment 1 (step 23 and step 24). The inside 1 is a cooling setting, and since it is at the end of the three insides, it is determined that the inside of the compartment has a large refrigerant flow rate. The electromagnetic valve opening time setting unit 112b sets the opening time of the electromagnetic valve 102a to a predetermined time (for example, 1 min) while the compressor 103 is stopped because the inside 1 is in the inside having a large refrigerant flow (step 41). Next, the electromagnetic valve delay time setting unit 212a sets a time from when the internal solenoid valve 102b operates while the compressor is stopped until the internal solenoid valve 102a starts operating (for example, 4 min). (Step 42).

  Each in-compartment refrigerant flow rate determination unit 112a determines the refrigerant flow rate in the in-compartment 2 (Step 23 and Step 24). The inside 2 is a cooling setting, and since it is in the middle of the three insides, it is determined that the inside of the compartment has a small refrigerant flow rate. The electromagnetic valve opening time setting unit 112b sets the opening time of the electromagnetic valve 102b to a predetermined time (for example, 5 min) while the compressor 103 is stopped because the inside 2 is in the inside having a small refrigerant flow rate (step 25).

  Each in-compartment refrigerant flow rate determination unit 112a determines the refrigerant flow rate in the in-compartment 3 (Step 23 and Step 24). Since the chamber 3 is heated, the electromagnetic valve opening time setting unit 112b sets the opening time of the electromagnetic valve 102c to zero while the compressor 103 is stopped regardless of the refrigerant flow rate (step 26).

  Next, referring to FIG. 9, the operation (step 5) of electromagnetic valve opening / closing control will be described.

  While the compressor 103 is stopped, the electromagnetic valve 102a in the chamber having a large refrigerant flow rate and the electromagnetic valve 102c in the heating setting chamber (inside chamber 3) are closed (step 31).

  When the compressor stop time reaches the solenoid valve operation start time (zero time indicating immediately after the compressor stops) (step 32), the solenoid valve 102b in the refrigerator having a small refrigerant flow rate is opened (step 33), and the solenoid valve 102b is opened. The measurement of the waiting time is started (step 34). When the time during which the electromagnetic valve 102b is open reaches a predetermined time (for example, 4 minutes), the electromagnetic valve 102a is opened (step 52 and step 53), and measurement of the time during which the electromagnetic valve 102a is open is started (step 54).

  When the opening time of the solenoid valve 102a and the solenoid valve 102b reaches a predetermined time (for example, 5 min · 1 min, respectively), the solenoid valve 102a and the solenoid valve 102b are closed (step 35, step 55, step 56), and processing is performed. Exit.

  Note that the time from when the solenoid valve 101b operates until the solenoid valve 101a operates is not limited to 4 minutes. Further, the time for opening the electromagnetic valve 101a is not limited to 1 min. The electromagnetic valve operation start time is not limited to immediately after the compressor is stopped. The time during which the solenoid valve 102b is open is not limited to 5 minutes. Further, the opening and closing of the electromagnetic valve 102a may be repeated a predetermined number of times.

  As described above, in the present embodiment, the electromagnetic valve delay opening / closing control means 211 (pressure balance means) includes the respective refrigerant flow rate determination units 112a, the electromagnetic valve open time setting unit 112b, the electromagnetic valve delay time setting unit 212a, The electromagnetic valve delay single opening / closing control means 212 includes a compressor stop time counting unit 112c, an electromagnetic valve opening time counting unit 112d, and an electromagnetic valve delay time counting unit 212b. In the vending machine 11 in which the temperature is set, while the compressor 103 is stopped, the electromagnetic valve 102b in the chamber with a low refrigerant flow rate is opened for a predetermined time, and the electromagnetic valve 102a in the chamber with a high refrigerant flow rate is opened. By maintaining the pressure balance by opening the solenoid valve 102a in the chamber having a large refrigerant flow amount for a predetermined time after a predetermined time, the refrigerant is stopped while the compressor 103 is stopped. The refrigerant is not allowed to flow to the evaporator 101a in the warehouse having a large amount, and the refrigerant flow to the evaporator 101b in the warehouse having a small refrigerant flow is increased by the amount accumulated in the evaporator 101a in the warehouse having a large refrigerant flow. Thus, the cooling time can be shortened and the operation rate of the compressor 103 can be reduced. Furthermore, the pressure balance time can be further shortened by operating the electromagnetic valve 102a in the warehouse having a large refrigerant flow rate in a state where the pressure balance is being achieved.

  In the present embodiment, the electromagnetic valve delay opening / closing control means 211 (pressure balance means) may be replaced with the electromagnetic valve delay multiple opening / closing control means 213.

  The configuration, operation, action, and effect of the electromagnetic valve delay multiple opening / closing control means 213 will be described below.

  The configuration of the electromagnetic valve delay multiple opening / closing control means 213 will be described.

  The electromagnetic valve delay multiple opening / closing control means 213 includes an internal refrigerant flow rate determining unit 112a, an electromagnetic valve opening / closing time setting unit 113b, an electromagnetic valve delay time setting unit 212a, an electromagnetic valve opening / closing time counting unit 113c, and a compressor stop time counting unit 112c. And a solenoid valve opening / closing count unit 113d and a solenoid valve delay time count unit 212b.

  The operation of the electromagnetic valve delay multiple opening / closing control means 213 is the following operation of the operation of opening the electromagnetic valve 101b in step 33 of FIG.

  The electromagnetic valve 101b is opened for a predetermined time (for example, 59 seconds), and then closed for a predetermined time (for example, 1 second). This opening / closing operation is performed once, and is repeated a predetermined number of times (for example, 6 times).

  The time for opening and closing the electromagnetic valve 102b is not limited to 59s and 1s.

  The number of times that the opening and closing of the electromagnetic valve 102b is repeated is not limited to six. Further, the opening and closing of the electromagnetic valve 102a may be repeated a predetermined number of times.

  As described above, in the present embodiment, the electromagnetic valve delay opening / closing control means 211 (pressure balance means) includes the respective refrigerant flow rate determination units 112a, the electromagnetic valve opening / closing time setting unit 113b, the electromagnetic valve delay time setting unit 212a, The electromagnetic valve delay multiple opening / closing control means 213 includes an electromagnetic valve opening / closing time counting unit 113c, a compressor stop time counting unit 112c, an electromagnetic valve opening / closing frequency counting unit 113d, and an electromagnetic valve delay time counting unit 212b. The means 213 opens and closes the electromagnetic valve 102b in the refrigerator with a low refrigerant flow rate for a predetermined time while the compressor 103 is stopped in the vending machine 11 set for cooling and heating, and this is performed a predetermined number of times. By repeatedly opening the solenoid valve 102a in the warehouse with a high refrigerant flow rate for a predetermined time after a predetermined time from the operation of the inside with a low refrigerant flow rate. By balancing the force, while the compressor 103 is stopped, the refrigerant is not allowed to flow to the evaporator 101a in the cabinet having a large refrigerant flow rate, and the refrigerant flow rate to the evaporator 101b in the cabinet having a small refrigerant flow rate is increased. By increasing the amount accumulated in the evaporator 101a in the refrigerator, the cooling time can be shortened and the operating rate of the compressor 103 can be reduced. Moreover, the pressure balance time can be further shortened by operating the electromagnetic valve 102a in the warehouse having a large refrigerant flow rate in a state where the pressure balance is being achieved. Furthermore, since there is time to close the electromagnetic valve 102b in the warehouse with a small refrigerant flow rate, energy saving can be realized correspondingly.

  In addition, this Embodiment is not limited to the vending machine 11 of a three-chamber machine, The inside of the store | warehouse | chamber with a small refrigerant | coolant flow volume is not limited to the inside store | warehouse | chamber.

As described above, the vending machine according to the present invention, since it reduces the cooling time to reduce the operating rate of the compressor is efficacy, such as cooling equipment for cooling a plurality of indoor using the electromagnetic valve applications It can also be applied to.

Cooling system configuration diagram of vending machine in Embodiment 1 and Embodiment 2 of the present invention Configuration diagram of an automatic vending machine according to the first embodiment of the present invention Flowchart illustrating the operation of the vending machine according to the first exemplary embodiment of the present invention Flowchart illustrating the operation of the vending machine according to the first exemplary embodiment of the present invention Flowchart illustrating the operation of the vending machine according to the first exemplary embodiment of the present invention Configuration diagram of an automatic vending machine according to the second embodiment of the present invention Flowchart illustrating the operation of the vending machine according to the second embodiment of the present invention Flowchart illustrating the operation of the vending machine according to the second embodiment of the present invention Flowchart illustrating the operation of the vending machine according to the second embodiment of the present invention Configuration of conventional vending machine Flow chart showing the operation of a conventional vending machine

Explanation of symbols

1 Left warehouse (inside)
2 Inside warehouse (inside)
3 Right warehouse (inside)
DESCRIPTION OF SYMBOLS 11 Vending machine 100,200 Main control part 101a, 101b, 101c Evaporator 102a, 102b, 102c Solenoid valve 103 Compressor 104 Condenser 111 Solenoid valve opening / closing control means 112 Solenoid valve single opening / closing control means 113 Solenoid valve multiple opening / closing control means 112a Refrigerant flow rate determination unit 112b Solenoid valve opening time setting unit 112c Compressor stop time counting unit 112d Solenoid valve opening time counting unit 113b Solenoid valve opening / closing time setting unit 113c Solenoid valve opening / closing time counting unit 113d Solenoid valve opening / closing number counting unit 211 Solenoid Valve Delay Open / Close Control Unit 212 Solenoid Valve Delay Single Open / Close Control Unit 213 Solenoid Valve Delay Multiple Open / Close Control Unit 212a Solenoid Valve Delay Time Setting Unit 212b Solenoid Valve Delay Time Count Unit

Claims (4)

There are a plurality of interiors provided with a compressor and a condenser that constitute a circuit through which a refrigerant flows and an internal temperature detection thermistor, and the evaporators in each storage are connected in parallel, and each of the evaporators When the solenoid valve is connected to the refrigerant inflow side of the evaporator, and the inside temperature detection thermistor in the cooling set compartment detects that the cooling end temperature is reached, the inside temperature of the inside where the cooling end temperature is reached. The solenoid valve is closed so that the refrigerant does not flow into the evaporator, and the compressor is stopped when all the solenoid valves corresponding to the interior of the cooling setting are closed. A vending machine that opens the electromagnetic valve of the evaporator having a smaller refrigerant flow rate in a cooling setting while maintaining the closed state of the electromagnetic valve of the evaporator . When all of the solenoid valves corresponding to the interior of the cooling set are closed, the compressor is stopped, and then only the solenoid valve of the evaporator having the smaller refrigerant flow rate in the cooling setting is opened for a predetermined time. Item 2. The vending machine according to item 1 . When all the solenoid valves corresponding to the interior of the cooling setting are closed, the compressor is stopped, and then the opening operation and the closing operation of only the solenoid valve of the evaporator having the smaller refrigerant flow rate in the cooling setting are alternately specified. The vending machine according to claim 1, wherein the vending machine is repeated a number of times . The vending machine according to any one of claims 1 to 3, wherein when the compressor is stopped, the solenoid valve of the evaporator having the larger refrigerant flow rate in the cooling setting is maintained closed. .

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