JP2002195719A - Control device and method of compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the control device and method of a compressor for making the balance appropriate between the load and cooling performance of the compressor, and at the same time, realizing appropriate cooling capacity according to the conditions. SOLUTION: As the operation method of the inverter compressor 10, based on the inner temperature (temperature inside a room) of each of product rooms 1a, 1b, and 1c, the temperature (product temperature) of an accommodated product itself, a defrosting signal for indicating the state of defrosting operation to an evaporator 3, door opening/closing information for indicating the opening/ closing state of the opening/closing door (not shown) of a vending machine, and product replenishment information for indicating the replenished state of products, the control device of the compressor comprises an operation method- setting section 21 for selecting either pull-down operation or steady operation, and a speed command section 21 for setting the speed of the inverter compressor 10, according to the operation method selected by the operation method-setting section 21 and instructing the set speed to the inverter compressor 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device and a control method for a compressor constituting a cooling cycle of a vending machine, and more particularly, to switching between a pull-down operation and a steady operation of a compressor, and a control method for a pull-down operation. The present invention relates to a control device and a control method in which the operation method is improved.

[0002]

2. Description of the Related Art For example, a vending machine for heating and cooling a product such as a canned beverage has conventionally been provided with a constant speed compressor constituting a cooling cycle, and by controlling ON / OFF of the constant speed compressor, It exhibits a predetermined cooling capacity. The interior of a product room for storing products of a vending machine (hereinafter referred to as a refrigerator) is usually divided into a plurality of rooms (for example, three rooms), and each room is cooled or heated by a controller and cooled. And a heated product can be provided by a single vending machine.

Hereinafter, a cooling cycle of a vending machine will be described with reference to a vending machine in which the interior is divided into three chambers. 5 is a schematic diagram showing a conventional vending machine, FIG. 6 is a block diagram showing an input / output relationship of a controller, FIG. 7 is a block diagram showing a control method of a constant speed compressor,
FIG. 8 is a flowchart illustrating a method of controlling the solenoid valve and the compressor according to the temperature in the refrigerator, and FIG. 9 is a timing chart illustrating operations of the solenoid valve and the compressor according to the temperature in the refrigerator.

[0005] As shown in FIG. 5, a product room 1 of a vending machine is provided.
Is divided into three chambers (in the figure, a left chamber 1a, a middle chamber 1b, and a right chamber 1c). Further, the machine room 2 is provided with a condenser 5, a constant speed compressor 6, an electromagnetic valve 7, a capillary tube 8 as an expander, and the like, and these are connected to the evaporator 3 by piping to constitute a cooling unit. are doing.

Although not shown in FIG. 5, a controller 9 for controlling each component of the cooling unit is further provided inside the vending machine. "CC
One of three operation modes, "C", "CCH", and "CHH", according to the number of commodity rooms to be cooled, can be selectively operated. Here, “C” represents cooling (cold) of the product, “H” represents heating (hot) of the product, and “CCC” means that all three of the product rooms are cold-operated. , "CCH"
“CHH” means cold operation of two rooms and hot operation of two rooms, and “CHH” means hot operation of two rooms. The hot operation is performed by a heater (not shown), and the cold operation is performed by the cooling unit described above.

As shown in FIGS. 6 and 7, the cold operation by the controller 9 is performed by controlling the temperature of each of the chambers 1a, 1b, 1c obtained by the internal temperature sensors 4 provided for each of the chambers 1a, 1b, 1c. Based on the information (inside temperature Tr, evaporation temperature (entrance temperature of evaporator 3) Te, etc.), the solenoid valves 7 corresponding to the respective chambers 1a, 1b, 1c are individually controlled to open and close, and a constant speed compressor. 6 and the fan of the condenser 5 by ON / OFF control (start / stop control). In addition, along with the opening / closing control of the electromagnetic valve 7, the fan of the evaporator 3 is also driven / stopped.

Next, the content of control of the cooling of the product by the controller 9 will be described with reference to an example of the "CCC" mode in which all the three rooms are in the cold operation.

As shown in FIG. 8, first, the inside temperature of each of the commodity rooms 1a, 1b, 1c is read by the inside temperature sensor 4 (step 10 (S10)), and each temperature information obtained by reading these is obtained. , The ON / OFF control of the solenoid valve 7 is performed for each of the chambers 1a, 1b, 1c (S1).
1). That is, for example, the solenoid valve 7 is turned on when the inside temperature is 4 ° C. or higher, and the solenoid valve 7 is turned off when the inside temperature is 0 ° C. or less (S11). In addition, when the temperature exceeds 0 ° C. and 4
In the range below ℃, the previous change state is maintained.
That is, the temperature inside the refrigerator becomes 4 ° C. or more, and the solenoid valve 7 is turned on.
ON afterwards, until the temperature in the refrigerator becomes 0 ° C or less
While the state is maintained, when the temperature in the refrigerator becomes 0 ° C. or less and the solenoid valve 7 is turned off, the OFF state is thereafter maintained until the temperature in the refrigerator becomes 4 ° C. or more.

Next, ON / OFF control of the constant speed compressor 6 is performed (S12). That is, for example, when at least one of the three solenoid valves 7 is in an ON state (open state),
The operation is performed with the constant speed compressor 6 turned on, and the three solenoid valves 7
Are all in the OFF state (closed state), the constant speed compressor 6 is turned off and stopped, and the interior of each product room is kept at 0 ° C.
Maintain in the range of 4 ° C. The above is the control in the steady operation. Each of the chambers 1a, 1b,
FIG. 9 is a timing chart showing the operation timing of the solenoid valve 1c and the constant speed compressor 6 of FIG.

[0010]

By the way, in the vending machine, the demand for cooled products is increased in the summer season, and in order to cope with this demand, all three rooms are operated by cold operation "CC".
The "C" mode is selected. On the other hand, in the winter, the demand for cooled products is reduced and the demand for heated products is increased. It is common to operate in the "CCH" mode in the middle of the spring and fall seasons. Therefore, the operation mode differs depending on the seasonal change in the outside air temperature, the operation mode, and the like, and the load of the cooling unit greatly changes.

However, conventionally, as described above, the constant speed compressor 6 is used as the compressor, and the ON / OF of the constant speed compressor 6 is used.
Since only the F is changed to cope with the load fluctuation, the cooling capacity to be exhibited depends on the cold single-room operation in winter ("CHH" mode) (at light load) and the cold operation in all rooms in summer (" CCC "mode) (at the time of large load), while the capacity of the constant-speed compressor 6 is constant, so that the cooling capacity is excessive with respect to the load at light loads other than summer. As a result, there is a problem that the operation consumes energy wastefully, and the energy loss is particularly large in winter.

Further, conventionally, the product temperature was kept in an appropriate range only by controlling the constant speed compressor ON / OFF in accordance with the temperature in the refrigerator. If the same control is performed between when the product is replenished and when the product in the refrigerator is already sufficiently cooled, the product will not be cooled sufficiently or the energy will be saved by the time the product is purchased. From the viewpoint of the above, it is not necessarily appropriate.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and has a compressor capable of exhibiting an appropriate cooling capacity according to a situation while appropriately balancing a load and a cooling capacity of the compressor. It is an object of the present invention to provide a control device and a control method.

[0014]

In order to achieve the above object, a control device for a compressor according to claim 1 of the present invention comprises:
An evaporator, a condenser, an expansion mechanism, a cooling unit having at least a compressor, and a controller for a compressor in a vending machine including a controller that controls the cooling unit, wherein the compressor is an inverter compressor And the controller is configured to control a defrost signal indicating a state of a defrosting operation on the evaporator in the vending machine, wherein the internal temperature of the product room accommodating the product (the internal temperature), the temperature of the product (product temperature), Based on at least one of door open / close information indicating the open / close state of the open / close door of the vending machine and product replenishment information indicating a replenishment state of the product, a pull-down operation or a steady operation as the operation method of the cooling unit. An operation method setting unit for selecting, and according to the operation method selected by the operation method setting unit, set the rotation speed of the inverter compressor, Set the rotational speed, characterized in that a rotational speed command unit for commanding to the inverter compressor.

Here, the pull-down operation is performed, for example, immediately after replenishing a product stored at room temperature into a product room,
When the product in the refrigerator is not sufficiently cooled, for example, immediately after the defrosting operation of the evaporator, the product is brought into a sufficiently cooled state as quickly as possible so as to provide the buyer with a sufficiently cooled product. Means steady-state operation, while steady-state operation means
Since the products in the refrigerator have already been cooled to a predetermined cooling temperature, this means a gentle operation in which power consumption is suppressed while maintaining this cooling state. Therefore, the pull-down operation is
Although the power consumption is higher than in the steady operation, the cooling rate of the product can be increased (the temperature gradient with respect to the time axis becomes larger).

The defrost signal is a signal indicating whether or not a defrost operation for ventilating between the outside of the product room and the outside of the product room has been performed in order to remove frost adhering to the evaporator by the operation of the evaporator. Yes, door opening and closing information is a signal indicating whether or not the door of the vending machine has been opened and closed, and product replenishment information is a signal indicating whether or not the product has been replenished, and a defrosting operation has been performed. In both cases, when the door is opened and when the product is refilled, the temperature inside the product room rises, so the defrost signal is turned on when the defrost operation is performed, and the door opening / closing information is displayed when the door is opened. O
N, when the product is replenished, the product replenishment information is turned ON.

Therefore, when the internal temperature is higher than the predetermined temperature T1, the operating method setting section determines that the product temperature is lower than the predetermined temperature T1.
When the temperature is higher than 2, when the defrost signal is ON, when the door opening / closing information is ON, or when the product replenishment information is ON, the pull-down operation is selected, and when the internal temperature is lower than the predetermined temperature T1, When the product temperature is lower than the predetermined temperature T2, when the defrost signal is OFF, when the door opening / closing information is OFF, and when the product replenishment information is OFF, the steady operation is selected.

The rotational speed command section instructs the inverter compressor of the rotational speed set in accordance with the operation method set by the operation method setting section. The compressor used for the control device is an inverter compressor that can exert not only mere ON / OFF control but also a cooling capacity according to the number of revolutions at the time of ON. According to the signal, the door opening / closing information and the product replenishment information, the pull-down operation and the steady operation can be switched.
Since the rotation speed of the inverter compressor is set so that the appropriate cooling capacity can be exhibited, the internal temperature,
The load and the cooling capacity represented by the product temperature, the defrost signal, the door opening / closing information, and the product replenishment information can be appropriately balanced.

According to a second aspect of the present invention, there is provided the compressor control device according to the first aspect, wherein at least each pattern of the number of rotations of the compressor corresponding to the pull-down operation is: An operation mode according to the number of the commodity rooms to be cooled, a number of evaporators being operated, a stop time of the inverter compressor, an ambient temperature outside the vending machine, and a temperature of an outer surface of the vending machine. , A temperature of suction air sucked into the condenser, four seasons information, a temperature of the product, a defrost signal indicating a state of a defrost operation on the evaporator, a door opening / closing indicating an open / close state of an opening / closing door of the vending machine. The information is set based on at least one of information and product replenishment information indicating a replenishment state of the product.

According to the control device for a compressor according to the second aspect, when the pull-down operation is selected, the command speed of the inverter compressor by the speed command unit is determined by the operation mode, the number of evaporators in operation. , Inverter compressor stop time, external atmosphere temperature, vending machine outer surface temperature, suction air temperature sucked into the condenser, four seasons information, product temperature, defrost signal, door opening / closing information, or product replenishment information,
Therefore, the inverter compressor can be operated with the load and the cooling capacity being more appropriately balanced.

It should be noted that not only when the pull-down operation is selected, but also when the steady operation is selected, the command rotation speed by the rotation speed command unit also includes the operation mode, the number of evaporators in operation, and the stoppage of the inverter compressor. Depending on the load: time, outside atmosphere temperature, vending machine outer surface temperature, suction air temperature sucked into the condenser, four seasons information, product temperature, defrost signal, door opening / closing information, or product replenishment information, Each may be set.

According to a third aspect of the present invention, in the compressor control apparatus according to the first or second aspect, the operating method setting unit sets the cooling mode selected in the pull-down operation. Switching the operation method from the pull-down operation to the steady-state operation on the basis of the cooling mode information and the number of compressor start / stops indicating the number of operation / stop times of the inverter compressor since the pull-down operation was started. Features.

Here, the cooling mode refers to, for example, a rapid cooling mode in which a product is rapidly cooled without considering energy saving and an energy saving mode in which energy saving is considered. , The internal temperature is lower than the predetermined temperature T1, or the product temperature is lower than the predetermined temperature T2.
If it becomes lower than normal, it will shift to steady operation as it is,
While contributing to energy saving, the rapid cooling mode
Since the cooling is continued until the temperature in the refrigerator becomes lower than the predetermined temperature T1 and reaches the temperature T3 at which the inverter compressor stops, the cooling rate of the product can be increased.

The number of times the compressor starts and stops means that after the temperature inside the refrigerator has dropped to the temperature T3 and the inverter compressor has temporarily stopped, the temperature inside the refrigerator rises to the predetermined temperature T1 and the inverter compressor starts operating again. The number of repetitions.

According to the compressor control device of the third aspect, the operating mode setting unit sets the operating mode of the inverter compressor to switch from the pull-down operation to the steady-state operation by changing the cooling mode selected in advance. Switching between the energy saving mode and the rapid cooling mode, and switching from the pull-down operation in which the rapid cooling mode is selected to the steady-state operation, a predetermined number of times of starting and stopping the compressor of the inverter compressor. Since the switching is performed in accordance with the above, it is possible to perform the operation switching adapted to these preset conditions.

According to a fourth aspect of the present invention, there is provided a method for controlling a compressor, comprising: a cooling unit having at least an evaporator, a condenser, an expansion mechanism, and a compressor; and a controller for controlling the cooling unit. In the method for controlling a compressor in a vending machine, the compressor is an inverter compressor, and the control is in the vending machine,
The internal temperature of the product room accommodating the product, the temperature of the product, a defrost signal indicating the state of the defrosting operation on the evaporator, the door opening / closing information indicating the open / close state of the open / close door of the vending machine, and the Based on at least one of the product replenishment information indicating the replenishment state, a pull-down operation or a steady operation is selected as the operation method of the cooling unit, and the rotation of the inverter compressor is selected according to the selected operation method. A number is set, and the set number of revolutions is commanded to the inverter compressor.

According to the compressor control method of the fourth aspect of the present invention, the compressor to be used is simply ON / OFF.
It is an inverter compressor that can exert not only control but also cooling capacity according to the number of revolutions at the time of ON, and according to the internal temperature, product temperature, defrost signal, door opening and closing information and product replenishment information, It is possible to switch between the pull-down operation and the steady operation, and in the operation method, the rotation speed of the inverter compressor is set so as to exert an appropriate cooling capacity. The load and the cooling capacity represented by the frost signal, the door opening / closing information, and the product replenishment information can be appropriately balanced.

According to a fifth aspect of the present invention, there is provided a compressor control method according to the fourth aspect, wherein at least each pattern of the number of rotations of the compressor corresponding to the pull-down operation is: The operation mode according to the number of the commodity rooms to be cooled, the number of evaporators being operated, the stop time of the inverter compressor, the ambient temperature outside the vending machine, and the temperature of the outer surface of the vending machine. , A temperature of the suction air sucked into the condenser, four season information, a temperature of the product, a defrost signal indicating a state of a defrost operation on the evaporator, a door opening / closing indicating an open / close state of an opening / closing door of the vending machine. The information is set based on at least one of information and product replenishment information indicating a replenishment state of the product.

According to the compressor control method of the fifth aspect, when the pull-down operation is selected, the command rotation speed for the inverter compressor is determined by the operation mode, the number of evaporators in operation, and the stoppage of the inverter compressor. Depending on the load: time, external atmosphere temperature, vending machine outer surface temperature, suction air temperature sucked into the condenser, four seasons information, product temperature, defrost signal, door opening / closing information, or product replenishment information, Since each is appropriately set, the inverter compressor can be operated with the load and the cooling capacity more appropriately balanced.

Note that not only when the pull-down operation is selected, but also when the steady-state operation is selected, the command rotation speed includes the operation mode, the number of evaporators in operation, the stop time of the inverter compressor, and the external atmospheric temperature. , The outside surface temperature of the vending machine, the temperature of the suction air sucked into the condenser, four seasons information,
Each of them may be set according to the load of the product temperature, the defrost signal, the door opening / closing information, or the product replenishment information.

According to a sixth aspect of the present invention, there is provided a compressor control method according to the fourth or fifth aspect, wherein cooling mode information indicating a cooling mode selected in the pull-down operation; Based on a compressor start / stop count representing the number of starts / stops of the inverter compressor from the start of the pull-down operation,
It is characterized by switching from the pull-down operation to the steady operation.

According to the compressor control method of the present invention, the operation method of the inverter compressor is switched from the pull-down operation to the steady-state operation, and the cooling mode selected in advance is the energy saving mode. The switching is performed in accordance with the rapid cooling mode, and further, in the switching from the pull-down operation in which the rapid cooling mode is selected to the steady operation, the switching is performed in accordance with the preset number of compressor start / stop times of the inverter compressor. Operation switching suitable for these set conditions can be performed.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a control device and a control method for a compressor according to the present invention will be described in detail with reference to the drawings. The present invention is not limited by the embodiment.

FIG. 1 is a block diagram showing a control device of a compressor according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing a vending machine provided with the control device shown in FIG. 1, and FIG. FIG. 4 is a block diagram showing the input / output relationship of the controller, and FIG. 4 is a flowchart showing a control method of the compressor. In the following description, the same components as those already described in the related art are denoted by the same reference numerals, and redundant description will be omitted.

In this embodiment, as shown in FIG. 2, the vending machine has three merchandise rooms 1a and 1a.
Although it is divided into b and 1c, the compressor control device and control method of the present invention are not limited to this embodiment. In the present embodiment, the operation mode (the mode indicating the cooling and heating of the three chambers 1a, 1b, and 1c: CCC, CCH, and CHH) is CCC (the three chambers 1).
a, 1b, and 1c).

First, the overall structure will be described with reference to FIGS.
It will be described based on. The opening / closing control of the solenoid valve 7 and the start / stop control of the inverter compressor 10 are the same as the opening / closing control of the solenoid valve and the start / stop control of the low-pressure compressor in the related art using the constant speed compressor, and are different from the related art. Is that an inverter compressor 10 is provided instead of the constant speed compressor (FIG. 2), and an inverter 11 for controlling the inverter compressor 10 is provided (FIG. 3).

The control device according to the present embodiment is provided in each of the commodity rooms 1a, 1b, 1 for accommodating a commodity such as a canned beverage.
(c), the temperature of the stored product itself (product temperature), a defrost signal indicating the state of the defrost operation on the evaporator 3, and the opening / closing door (not shown) of the vending machine An operation method setting unit 21 for selecting a pull-down operation or a steady operation as an operation method of the inverter compressor 10 based on door opening / closing information indicating an open / close state and product replenishment information indicating a product replenishment state; The number of revolutions of the inverter compressor 10 is set according to the operation method selected from 21 and the set number of revolutions is
And a rotation speed command unit 22 for commanding the rotation speed to zero.

Here, as each signal and each information inputted to the driving method setting section 21, signals and information described below are used. That is, regarding the inside temperature, each product room 1a,
About the temperature detected by the in-compartment temperature sensor 4 provided in 1b, 1c and the product temperature, the temperature detected by the not-shown product temperature sensor and the defrost signal
Signals generated by a controller (not shown) that controls the defrosting operation at the time of defrosting and door opening / closing information are signals generated when a push switch or a manual switch installed on the opening / closing door of the vending machine is opened, and product replenishment information. A signal generated when a vibration or sound is detected at the time of product replenishment and a replenishment is performed, or a stored number detection switch (not shown) provided on a product array rail of each of the product rooms 1a, 1b, and 1c is used when replenishing. The generated signal may be used.

The switching of the operation method of the inverter compressor 10 based on the inside temperature Tk, the product temperature Ts, the defrost signal, the door opening / closing information, and the product replenishment information by the operation method setting section 21 is shown in Table 1. Do so.

[0040]

[Table 1]

That is, if the internal temperature Tk is higher than the predetermined temperature T1 (Tk> T1), the pull-down operation 1 is selected, and if Tk <T1, the steady operation is selected. Similarly, if the product temperature Ts is higher than a predetermined temperature T2 (Ts> T2), the pull-down operation 2 is selected, and if Ts <T2, the steady operation is selected. Further, if the defrost signal is ON (defrost operation is executed), the pull-down operation 3 is selected. If the signal is OFF, the steady operation is selected, and the door opening / closing information is ON (door open).
If so, select the pull-down operation 4; if OFF, select the steady operation; if the product replenishment information is ON (with replenishment), select the pull-down operation 5; select.

The operating method setting unit 21 selects the steady operation only when all of these five conditions are the conditions that match the steady operation, and in other cases, that is, pulls down the pull-down even in any one condition. If the conditions match the operation, select the pull-down operation. Here, the pull-down operation is further divided into the five operation methods described above. For example, conditions that match the pull-down operation, such as when the internal temperature Tk is higher than T1 and the product temperature Ts is higher than T2, are used. If there are two or more, the product temperature Ts,
Internal temperature Tk, defrost signal, door opening / closing information, product replenishment information,
Shall take precedence.

Therefore, in Table 1, when all the conditions match the pull-down operation, the operation method setting unit 2
1 selects the pull-down operation 2 and only the product temperature Ts is a condition that matches the steady operation, and if the other four conditions match the pull-down operation, the pull-down operation 1 is selected, and the product temperature Ts and If the internal temperature Tk is a condition that matches the steady operation and the other three are conditions that match the pull-down operation, the pull-down operation 3 is selected, and only the door opening / closing information and the product replenishment information match the pull-down operation. In the case of the condition, the pull-down operation 4 is selected. In the case of the condition where only the product replenishment information matches the pull-down operation,
Select pull-down operation 5.

The operation method setting unit 21 receives a signal indicating a cooling mode selected in advance and the number of times of starting and stopping of the inverter compressor 10 to determine whether to switch from a pull-down operation to a steady operation, which will be described later. You. Here, the cooling mode is a mode representing switching from the pull-down operation to the steady operation, and includes a rapid cooling mode and an energy saving mode. As shown in Table 2, in the energy saving mode, the inside temperature Tk and the product When the temperature Ts becomes a condition that matches the steady operation, the operation shifts from the pull-down operation to the steady operation, and in the rapid cooling mode, the internal temperature Tk becomes the predetermined temperature T.
When the temperature falls below a predetermined temperature T3 lower than 1 (T3 <T1), the inverter compressor 10 stops. From this stopped state, the internal temperature Tk becomes higher than the predetermined temperature T3 and the inverter compressor 10 restarts. After the start / stop of the inverter compressor 10 to start the operation is repeated a predetermined number of times, the operation shifts to the steady operation. Note that the number of times the inverter compressor 10 is started and stopped, which is input to the operation method setting unit 21, is monitored as a condition for shifting from the pull-down operation to the steady operation in the rapid cooling mode.

[0045]

[Table 2]

The number-of-rotations instructing unit 22 has a
The rotation speed of the inverter compressor 10 is set in accordance with the operation method selected from 1 and the set rotation speed is instructed to the inverter compressor 10. Tk is in a substantially constant range (for example, 0
(° C. to 4 ° C.) and a rotational speed suitable for energy saving. On the other hand, the number of rotations commanded for each of the pull-down operations 1 to 5 is NF, NS,
The rotation speed is set to NT, NY or NG, and these rotation speeds are further subdivided and set so as to exhibit the optimum cooling capacity according to the load.

[0047]

[Table 3]

That is, the rotation speed command unit 22 includes the operation mode, the number of operating evaporators 3 (the number of operating evaporators: one room to
3), the time during which the inverter compressor 10 was stopped (compressor stop time min), the outside air temperature (° C), the door opening time (min), the number of refills (items), and the product temperature (° C). ing. And, corresponding to pull-down operation 1,
As shown in Table 4, the rotation speeds NF1 to NF18 are set for each combination of the number of operating evaporators and the compressor stop time. Note that NF1>NF6> NF18, NF1> NF1
3> NF18.

[0049]

[Table 4]

Similarly, corresponding to the pull-down operation 2, as shown in Table 5, the rotation speeds NS1 to NS18 for each combination of the number of operating evaporators and the product temperature are set. In addition,
NS6>NS1> NS13, NS6>NS18> NS1
3.

[0051]

[Table 5]

Similarly, in correspondence to the pull-down operation 3, as shown in Table 6, the rotation speeds NT1 to NT18 for each combination of the number of operating evaporations and the outside air temperature are set. In addition,
NT6>NT1> NT13, NT6>NT18> NT1
3.

[0053]

[Table 6]

Similarly, in correspondence to the pull-down operation 4, as shown in Table 7, the number of rotations NY1 to NY18 is set for each combination of the number of operating evaporations and the door opening time. Note that NY6>NY1> NY13, NY6>NY18> N
Y13.

[0055]

[Table 7]

Similarly, corresponding to the pull-down operation 5, as shown in Table 8, the rotation speeds NG1 to NG18 are set for each combination of the number of operating evaporators and the number of product replenishers. NG6>NG1> NG13, NG6>NG18> N
G13.

[0057]

[Table 8]

For example, with respect to the command rotational speed NF in the pull-down operation 1, instead of the rotational speed for each combination of the number of operation evaporators and the compressor stop time, the number of rotations NF19 to NF36
(Table 9) and the number of rotations NF37 to NF54 (Table 10) for each combination of the number of operating evaporators and the outer surface temperature of the vending machine;
The number of rotations NF5 for each combination of the number of operating evasions and seasonal information
5 to NF66 (Table 11) may be applied. In this case, NF24>NF19> NF31, NF24> NF3
6> NF31, NF42>NF37> NF49,
NF42>NF54> NF49, and NF57> NF
56>NF58> NF55, NF57>NF61> NF
65. When the outer surface temperature of the vending machine or the four seasons information is used, the information is input to the rotation speed command unit 22.

[0059]

[Table 9]

[0060]

[Table 10]

[0061]

[Table 11]

Next, the operation of the control device for a compressor according to this embodiment will be described with reference to the flowchart of FIG. First, the process waits for a start command from the controller 9 to the inverter compressor 10 (step 1 (S1)). When the start command is output, the operation method setting unit 21 determines whether the pull-down state is established, by checking the product temperature and the internal temperature. In addition, a determination is made based on the defrost signal, the door opening / closing information, and the product replenishment information, and an operation method corresponding to the determination result is selected according to the criteria shown in Table 1 (S2). The determination and selection of this driving method are as shown in Table 1.

That is, when it is determined that the pull-down state is not established, the operation method setting unit 21 selects the steady operation, outputs the result to the rotation speed command unit 22, and outputs the result to the rotation speed command unit 2.
2 instructs the inverter compressor 10 the rotation speed for the steady operation described above, and the inverter compressor 10 enters a steady operation (S2). On the other hand, when it is determined that the pull-down state, the operating method setting unit 21 determines whether the mode is the rapid cooling mode or the energy saving mode based on the input cooling mode,
In the case of the energy saving mode, the flag "1" is set in the register, and in the case of the rapid cooling mode, the operation method is output to the rotation speed command unit 22 as it is (S3).

The rotational speed command unit 22 first reads the input operation mode (S4). In this embodiment, the operation mode is “CCC”. The rotation speed command unit 22 further reads the number of operating evaporators (S
5) Read the outside air temperature, etc. (outside air temperature, compressor stop time, door opening time, number of replenished products and product temperature) (S)
6), referring to a lookup table (one of Tables 4 to 8) corresponding to the operation method selected by the operation method setting unit 21 and corresponding to information such as the number of operation evaporators obtained by reading. The command rotation speed is read (S7).

For example, when the operation method setting unit 21 selects the pull-down operation 1, the stop time in the most recent compressor stop state is 15 minutes, and the number of operation evaporators is three. Obtains the rotation speed NF3 with reference to the table of Table 4. The rotation speed command unit 22 converts the rotation speed NF3 read in this manner into the inverter compressor 10.
(S8).

As a result, the inverter compressor 10 rotates at the rotation speed NF3 corresponding to the load of the operation mode CCC, the number of the operation evaporators 3 and the compressor stop time of 15 minutes with the optimum cooling capacity for the pull-down operation. . The rotation of the inverter compressor 10 cools the commodity chambers 1a, 1b, 1c by the cooling operation of the refrigerant through the evaporator 3.

Here, if the cooling of the product rooms 1a, 1b, 1c continues, the difference in the arrangement, the number of products in stock, or the variation in the temperature sensor 4 in the product rooms 1a, 1b, 1c. For example, the inside temperature of at least one product room becomes lower than the predetermined temperature T3 set in advance, and the solenoid valve 7 is closed and cooling of the product room is stopped. As a result, the operation of the evaporator 3 in the product room stops, and the load fluctuates.

Then, the change in the number of operating evaporators is monitored (S9). If there is a change, the process returns to step 4 (S4) to obtain a new commanded rotation speed corresponding to the number of operating evaporators. The obtained rotation speed is instructed to the inverter compressor 10.

During the period in which the number of operating evaporators does not change, the operating method setting unit 21 checks the cooling mode that has been input (S10), and in the case of the energy saving mode, returns to step 2 (S2). Then, it is further determined whether or not the state is the pull-down state. At this time, if the pull-down state has been eliminated, the operation method setting unit 21 selects the steady operation,
The rotation speed command unit 22 also instructs the inverter compressor 10 of a rotation speed corresponding to the steady operation, and the inverter compressor 1
0 shifts to steady operation (S2).

On the other hand, when the input cooling mode is the rapid cooling mode, the start / stop of the inverter compressor 10 which stops only when all the product rooms 1a, 1b, 1c are cooled to the predetermined temperature T3. Monitor the status (S1
1) If stopped, the pull-down operation is terminated (S
12) The operation shifts to the steady operation, and if not stopped, the process returns to step 4 (S4), and the above-described operation is repeated until the inverter compressor 10 stops.

In the rapid cooling mode, in the cooling until the inverter compressor 10 is stopped only once, for example, the product put in the upper part of the refrigerator may be insufficiently cooled. Instead of terminating the pull-down operation with the number of stops, the monitoring of the number of times of starting and stopping of the inverter compressor 10 shown in FIG.
A processing step of counting the number of stops of the inverter compressor 10 between 1 (S11) and 12 (S12) (for example, ST = ST + 1 (the initial value of ST is 0))
It is preferable to add a processing step that does not escape from the pull-down operation until the counted number of stops reaches a predetermined value (STe).

As described above, according to the compressor control device and the control method of the present embodiment, the inverter compressor 10 capable of exhibiting the cooling capacity corresponding to the rotation speed during operation.
Is used, and the internal temperature, product temperature, defrost signal,
The pull-down operation and the steady operation can be switched in accordance with the door opening / closing information and the product replenishment information. Therefore, it is possible to appropriately balance the load and the cooling capacity represented by the inside temperature, the product temperature, the defrost signal, the door opening / closing information, and the product replenishment information.

Further, the command rotation speed by the rotation speed command unit 22 for the inverter compressor 10 in the pull-down operation is determined by the operation mode, the number of operating evaporators, and the inverter compressor 1.
The inverter compressor is set appropriately according to the load such as the stop time of 0, the outside air temperature, the outside surface temperature of the vending machine, the temperature of the suction air sucked into the condenser, the four seasons information, and the product temperature. 10 can be operated with a more appropriate balance of load and cooling capacity.

Further, the operation method setting section 21 sets the operation method of the inverter compressor 10 to switch the operation mode from the pull-down operation to the steady operation according to whether the cooling mode selected in advance is the energy saving mode or the rapid cooling mode. In the switching from the pull-down operation in which the rapid cooling mode is selected to the steady operation, the switching is performed in accordance with the preset number of compressor start / stops of the inverter compressor 10.
Operation switching suitable for these preset conditions can be performed.

In the compressor control apparatus and control method of this embodiment, the operation mode, the number of evaporators in operation, the stoppage time of the inverter compressor, the external atmospheric temperature, Outer surface temperature of the vending machine, temperature of intake air sucked into the condenser, four seasons information,
Although the inverter compressor 10 is controlled to operate at a rotation speed capable of exhibiting an appropriate cooling capacity corresponding to a load such as a product temperature, the control device and the control method of the compressor according to the present invention provide a pull-down operation. In addition, at the time of steady operation, the operation mode, the number of evaporators during operation, the stop time of the inverter compressor, the external ambient temperature, the external surface temperature of the vending machine, and the condenser It is preferable to control the inverter compressor 10 to operate at a rotational speed capable of exhibiting an appropriate cooling capacity corresponding to a load such as an intake air temperature to be sucked, seasonal information, and product temperature.

Further, in the steady operation, not only the load and the cooling capacity are balanced, but also from the viewpoint of energy saving, control is performed so that the power consumption is suppressed and the cooling capacity is effectively exerted. Preferably, for example, the present applicant discloses Japanese Patent Application Nos. 2000-196954 and 2000-27.
The control device and control method proposed in No. 8458 can be applied.

[0077]

As described above, according to the control apparatus for a compressor according to the present invention (claim 1), not only the ON / OFF control of the compressor used, but also the rotation speed at the time of ON is controlled. It is an inverter compressor that can demonstrate the appropriate cooling capacity, and can switch between pull-down operation and steady operation according to the internal temperature, product temperature, defrost signal, door opening / closing information, and product replenishment information, In the operation method, since the rotation speed of the inverter compressor is set to be able to exert an appropriate cooling capacity, the internal temperature, the product temperature, the defrost signal, the door opening / closing information, and the product replenishment information are provided. The load to be represented and the cooling capacity can be appropriately balanced.

Further, according to the compressor control device of the present invention (claim 2), the commanded rotation speed by the rotation speed command unit for the inverter compressor when the pull-down operation is selected is determined by the operation mode and the operation mode. Number of evaporators inside, inverter compressor stop time, outside ambient temperature, outside surface temperature of vending machine, temperature of suction air sucked into condenser, four seasons information, product temperature, defrost signal, door opening / closing information, Alternatively, since the load is appropriately set according to the load of the product replenishment information, the inverter compressor can be operated with the load and the cooling capacity more appropriately balanced.

Further, according to the compressor control device of the present invention (claim 3), the operation method setting unit preliminarily selects the operation method of the inverter compressor from the pull-down operation to the steady operation. The cooling mode is switched depending on whether the cooling mode is the energy saving mode or the rapid cooling mode. Further, in the switching from the pull-down operation in which the rapid cooling mode is selected to the steady operation, a preset compression of the inverter compressor is performed. Since the switching is performed according to the number of times of starting and stopping, it is possible to perform operation switching that meets these preset conditions.

According to the compressor control method of the present invention (claim 4), the compressor used is a simple O
It is an inverter compressor that can exert not only N / OFF control but also a cooling capacity according to the number of revolutions when it is ON. In addition, it can be used for the internal temperature, product temperature, defrost signal, door opening / closing information, and product replenishment information. Accordingly, it is possible to switch between the pull-down operation and the steady operation, and in the operation method, since the rotation speed of the inverter compressor is set so as to exert an appropriate cooling capacity, the temperature in the refrigerator, The load and the cooling capacity represented by the temperature, the defrost signal, the door opening / closing information, and the product replenishment information can be appropriately balanced.

According to the compressor control method of the present invention (claim 5), the command rotation speed for the inverter compressor when the pull-down operation is selected is determined by the operation mode, the number of evaporators in operation, Inverter compressor stop time, external atmosphere temperature, vending machine outer surface temperature, suction air temperature sucked into the condenser, four seasons information, product temperature, defrost signal, door opening / closing information, or product replenishment information. Because each is set appropriately according to the load,
The inverter compressor can be operated with a more appropriate balance between the load and the cooling capacity.

Further, according to the compressor control method of the present invention (claim 6), the operation method of the inverter compressor can be switched from pull-down operation to steady-state operation by a cooling mode selected in advance. The switching is performed according to the energy saving mode or the rapid cooling mode. Further, in the switching from the pull-down operation in which the rapid cooling mode is selected to the steady operation, the switching is performed according to the preset number of compressor start / stop times of the inverter compressor. Therefore, it is possible to perform operation switching suitable for these preset conditions.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a control device for an inverter compressor according to an embodiment of the present invention.

FIG. 2 is a schematic view showing a vending machine.

FIG. 3 is a block diagram showing an input / output relationship of a controller.

FIG. 4 is a flowchart showing a process of the control device for the inverter compressor according to the embodiment of the present invention.

FIG. 5 is a diagram showing a vending machine controlled by a conventional compressor control method.

FIG. 6 is a diagram showing an input / output relationship of a controller according to a conventional compressor control device.

FIG. 7 is a block diagram showing a conventional compressor control device.

FIG. 8 is a flowchart showing processing of a conventional control device.

FIG. 9 is a timing chart of control in a conventional compressor control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Commodity room 1a Left room 1b Middle room 1c Right room 2 Machine room 3 Evaporator 4 Inside temperature sensor 5 Condenser 6 Constant speed compressor 7 Solenoid valve 8 Capillary tube 9 Controller 10 Inverter compressor 11 Inverter 21 Operating method setting part 22 Speed command section

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Naoki Inoshita 1-1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. No. 1 Fuji Electric Co., Ltd. F term (reference) 3E044 AA01 CA01 CB05 CC08 CC10 DA08 DB14 DB16 3L045 AA02 BA01 CA02 DA02 EA01 GA07 HA03 HA07 LA06 MA01 MA02 NA15 NA17 PA01 PA02 PA03

Claims (6)

[Claims] 1. A control device for a compressor in a vending machine including a cooling unit having at least an evaporator, a condenser, an expansion mechanism, and a compressor, and a controller for controlling the cooling unit, wherein the compressor is , An inverter compressor, wherein the controller is a defrosting signal indicating a state of a defrosting operation for the evaporator in the vending machine, the temperature inside the product room accommodating the product, the temperature of the product, the vending machine Based on at least one of door opening / closing information indicating an opening / closing state of a machine opening / closing door, and product replenishment information indicating a replenishment state of the product, as an operation method of the cooling unit,
An operation method setting unit for selecting a pull-down operation or a steady operation; and a rotation speed of the inverter compressor according to the operation method selected by the operation method setting unit. A control device for a compressor, comprising: a rotation speed command unit for commanding the compressor. 2. A pattern of at least the number of revolutions of the compressor corresponding to the pull-down operation includes an operation mode corresponding to the number of the product rooms to be cooled, the number of operating evaporators, and the inverter compressor. Down time, ambient temperature outside the vending machine, temperature on the outer surface of the vending machine,
Temperature of intake air sucked into the condenser, four season information,
Of the temperature of the product, a defrost signal indicating a state of a defrosting operation on the evaporator, door opening / closing information indicating an open / close state of an open / close door of the vending machine, and product replenishment information indicating a replenishment state of the product. The compressor control device according to claim 1, wherein the control device is set based on at least one. 3. An operation method setting unit, comprising: a cooling mode information indicating a cooling mode selected in the pull-down operation; 3. The compressor control device according to claim 1, wherein the operation method is switched from the pull-down operation to the steady operation based on the number of stops. 4. A method for controlling a compressor in a vending machine, comprising: a cooling unit having at least an evaporator, a condenser, an expansion mechanism, and a compressor; and a controller for controlling the cooling unit. , An inverter compressor, wherein the control includes: a defrosting signal indicating a state of a defrosting operation on the evaporator in the vending machine; A pull-down operation or a steady operation is selected as an operation method of the cooling unit based on at least one of door opening / closing information indicating an opening / closing state of an opening / closing door of the machine and product replenishment information indicating a replenishment state of the product. Setting the number of revolutions of the inverter compressor according to the selected operation method;
A method for controlling a compressor, wherein the set rotation speed is commanded to the inverter compressor. 5. Each pattern of the number of revolutions of the compressor corresponding to at least the pull-down operation includes an operation mode corresponding to the number of the product rooms to be cooled, the number of operating evaporators, and the inverter compressor. Stop time, ambient temperature outside the vending machine, temperature on the outer surface of the vending machine,
Temperature of intake air sucked into the condenser, four season information,
Of the temperature of the product, a defrost signal indicating a state of a defrosting operation on the evaporator, door opening / closing information indicating an open / close state of an open / close door of the vending machine, and product replenishment information indicating a replenishment state of the product. The compressor control method according to claim 4, wherein the control method is set based on at least one. 6. The cooling mode information indicating a cooling mode selected in the pull-down operation, and a compressor start / stop count indicating a start / stop count of the inverter compressor after the pull-down operation is started. The method of controlling a compressor according to claim 4, wherein an operation method is switched from the pull-down operation to the steady operation.