JPS6129667A - Feed controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply control device that controls the operation of a plurality of electrical devices including at least one refrigerator.

Electrical equipment includes not only normal lighting, blower motors, and hot water boilers, but also refrigerators such as refrigerator/refrigeration showcases, refrigeration pressure, and air conditioning equipment. For example, as shown in Figure 1, large stores such as supermarkets and department stores (1)
There is. This power receiving equipment is connected to an appropriate power receiving device (2
With the power supplied through the
Electrical equipment such as R--+) (Rn), an air conditioning refrigerator (3), a refrigerator for cold storage (4), lighting equipment (5), and a blower (not shown) are in operation.

In addition, as shown in (R8), the showcase refrigerator has one compressor (C1) and three product storage compartments (L,) (R2) (
A refrigeration cycle is configured with a condenser (6) and a liquid receiver (7) to cool the refrigeration cycle (R3);
Two product storage compartments (L4XL5) for one compressor (C2)
2 connected in parallel, like (R3)
A compression refrigeration cycle is configured to cool three product storage units (R6) (L7J (Ls) with one compressor (C,,) (C3), such as (Rn-,) (Rn). Various types of products, such as those with a refrigeration cycle configured such that one compressor (C, I) (Cn) cools one product storage section (L--1) (, L, n). The air conditioning refrigerator (3) and the refrigerator refrigerator (4) are not particularly shown, but like the showcase refrigerator, they are equipped with a compressor and a condenser, and the The refrigeration and air conditioning equipment is configured to cool the load space.In addition, (V,) (S,), (V2) (
S2)・(V,,, ) (S m )-(SXSI is installed one by one in each product storage part (L,) (R2)..., etc., corresponding to the load space related to the refrigerator. A refrigerant liquid control solenoid valve (hereinafter referred to as a liquid solenoid valve) and a temperature sensor for the product storage area.When the temperature of the product storage area reaches a set temperature, each of the liquid solenoid valves detects when the load space is connected to the The valve is operated to close the valve separately and independently from the refrigerator or other load space.

For example, when the temperature of the product storage section (Ll) reaches the set temperature, only the liquid solenoid valve (V,) is closed, and the heat exchanger for cooling the product storage sections (L2) (L3) that do not reach the set temperature The liquid solenoid valves (F2) (F3) that supply liquid refrigerant to the tank remain open, and the compressor (C2) to which this product compartment (Ll) is associated is directly connected to the closing of the liquid solenoid valve (vl). Continue driving without any relationship.

The power required to operate such refrigeration and air conditioning equipment varies widely depending on the load conditions of each refrigerator, such as the amount of stored products, rotation rate, number of customers, outside air conditions, and frost formation. The amount of power fluctuates, and if each refrigerator is left to operate freely, it is necessary to set the capacity of the power receiving equipment in accordance with the expected maximum power usage at the moment. Furthermore, if a control device capable of rationally reducing the power consumption of electrical equipment operated simultaneously can be obtained, the running costs of power receiving equipment and the electrical energy consumption can be greatly reduced.

The present invention is a power supply control device that performs centralized management of power receiving equipment, which was developed in view of the above points, and the present invention will be described below with reference to an embodiment of the power receiving equipment shown in FIG.

FIG. 2 is a block configuration diagram showing an embodiment in which the control device of the present invention is applied to the large-scale store equipment shown in FIG. It is represented by the number.

(X+) (X2)...(X,) is the compressor (CI) (C2)...(
A relay that supplies and stops power to C,), (P,) (P
Ol(F2)(F21°(Pri is a central controller (8) and relay (X-1) (X2)-(
The connector (9) connects the temperature sensors (S,) (S2)... (Sn) of each product storage section to the connector (9) that sequentially receives temperature input from the temperature detectors (S,) (S2)... (Sn) of each product storage section according to instructions from the central controller (8). The multiplexer (C3) that switches and sends the voltage to the input/output interface via the voltage frequency converter (101, old counter) is a timer that can start and stop power supply to lighting equipment (5) and boilers (not shown) at fixed times. Relay for power supply to the load side, (151 is an alarm display device, (t6) is an alarm notification device, (Q is an input device for control setting values, (17) is a time display device, (181 is a power consumption recording device, and C9 is , a storage device for storing control setting values and programs (hereinafter referred to as ROM), (20+ is a storage device for program control execution (hereinafter referred to as RAM), (221 is a converter for detecting the power used by the power receiving equipment, It is a power indicator.

Therefore, the large-scale integrated circuit 2 constituting the centralized controller (8)
41 contains a load management logic (25), a temperature management logic (26), a time management logic (271) that divides the frequency of the commercial frequency power supply and manages time, and a system controller (not shown), and an address bus. Guo), f
-Tahas (291C291 output) GOl, -1 (ROM (19° RAM) 201. Input/output interface (connected to 12+).

The control setting value input device (Ql includes, for example, the setting of the control temperature of each freezing and refrigerating equipment (Q), the switching time setting of power consumption control (C8), which will be described later), and the setting of the stop time (Q,
), maximum allowable power setting (Q, ), power differential setting (Q, ), night setback setting (C7
), timer load management time settings (Q, l), etc. In both cases, the setting values and the number of the refrigerator or product storage unit are converted from the operation value of the numeric keypad or rotary switch into digital quantities and sent to the input/output interface. Sent. Alarm display device (+51 is displayed by a suitable light emitting element (F,) (F2)...(Fl) such as a light emitting diode,
The display contents are 1. For example, excessive power consumption alarm (F,
), Load display during additional time control (F, )...Temperature abnormality alarm in load space such as product storage area (Fl, -2)...Power outage alarm (Fl-I), Self-check function failure alarm ( F
l ) etc., among which temperature abnormality alarm (Fl-2),
The output signals of the power failure alarm CF'1-1) and the failure alarm ('F 1 ) of the self-check function are OR logic element 011.
It is connected to an alarm notification device for security companies, security stations, etc. via

Control of the power receiving equipment having such a configuration will be explained below.

In order to simplify the explanation of the present invention, the refrigerator in FIG. 1 and FIG. 2 related to its explanation is a compressor (C,) (
C2)・(C,,)(Cn) is a relay (X,)(X2)
...(Xn I) When power is supplied via (Xn), each compressor is individually controlled according to the cooling state of the connected compressor, and each compressor cools each load space. The refrigerator is shown as having a controller (not shown) that can perform defrosting operation independently of other refrigerators when dew has formed on the heat exchanger. Therefore, the central controller (8) and the refrigerator (,R,) (R2
) - (Rn) +31 (The relationship with 41 is that the presence or absence of defrosting operation is detected via the defrost detector (Dl) (D2)... and the connector (P, ) (P2)... , load space (
L, ) (L2) ... (L, TI) (L) (The temperature of the mouth is detected via the temperature (91, etc.), and these detection inputs and various setting values written in advance in the storage device Q9 The central controller (8)
Relay for power supply to the compressor (X,) (X2)
...(Xn-1) (Xn) and the liquid solenoid valve (V
1] (V2)-(V,, -,) (Vm) is controlled.

Therefore, to control the power receiving equipment by the central controller (8),
In order to ensure that one or more of the electrical devices that make up the power receiving equipment are in a stopped state, relays (Xl) (X2),
” (Xn-1) (Xn) By sequentially opening one or more of C31 and forcibly stopping all electrical equipment for a set time at regular intervals, the total power consumption (hereinafter referred to as total When the total power consumption in the power receiving equipment (hereinafter referred to as power consumption) exceeds a set value, a predetermined ROM (19
) is combined with a power consumption control mechanism that stops electrical equipment according to the order written in the code and suppresses power consumption below a set value.

However, if the electrical equipment whose operation is stopped by the output signal from the power consumption ITP mechanism or the total power consumption control mechanism is a refrigerator, the storage room, product storage room, etc. that is maintained at a low temperature by the refrigerator The load space is stopped after confirming that the temperature conditions are unique to that space, and the operating relationship is as shown in Figure 3. will be held.

That is, from the control setting value input device Q in the ROM←9 of the central controller, the power consumption setting value of the power receiving equipment (W8), the power differential (WD) to be described later, and the cooling temperature of each load space ('r+) (T2) ・...(Tm-+)
(TITl), total power consumption control switching time (τ, ) (τ
2) Similarly, when the load of the refrigerator that constitutes the power outage equipment is in a normal state and the power consumption is less than the set value (W8), the output signal from the total power consumption control mechanism is maintained for a certain period of time (τ
1) (τ2), for example, the first group of electrical equipment (Ce) (CK-+)... and the second group of electrical equipment (
The corresponding relays (XK) (XK-+ )...(Xn) (Xn- +)・
An output signal of opening is output.

Relay CX-) CX--+)-(X-) as above
(Xn-1)... are opened sequentially, and the first and second groups
By sequentially stopping the operation of the electrical equipment, which is the compressor of the group, when the ambient temperature is higher than 0° C., off-cycle defrosting is sequentially performed by the atmosphere of the cooler corresponding to each compressor during the operation stop time.

In this case, when the power consumption exceeds the allowable value (W, ) (point G) due to an increase in the refrigeration load, etc., the power consumption control mechanism will control the power consumption for a certain period of time (τ) (this time span is the total amount of power An output signal is issued every time (preferably shorter than the time width (τ) of the control mechanism), and the second group of electrical equipment (Cn) (
Cn-t)... in order to stop the corresponding relays (Xn) (Xn-r)... in a predetermined order.
will be released.

Note that the classification of electrical equipment into the first group and the second group is for convenience, and when grouping is not necessary, they are treated as C,=C.

When the power consumption is reduced from the set value (W6) by an amount equal to or greater than the power differential (W,) due to such power consumption control, the electrical equipment (C,) (C:, - An output signal is issued to increase the number of operating units so that the units return to operation in the reverse order from when they stopped.

After going through this process of power consumption control, if the load condition returns to light load (Hl) or normal load (H2), power consumption control is no longer necessary and only total power amount control continues. .

As described above, in the power supply control device of the present invention, the power consumption of the power receiving equipment is kept below the rated power of the power receiving equipment by controlling the total power amount, and it is not possible to reduce the power consumption below the set value by controlling the total power amount alone. Under conditions where this cannot be maintained, use power consumption control to forcibly stop the operation of electrical equipment with warm temperature control and lighting conditions, and ensure that the power consumption never exceeds the rated power of the power receiving equipment. This shall be managed to ensure that no such occurrence occurs.

Therefore, such power consumption control and total power consumption control are based on the premise that the refrigerators included in the electrical equipment, and more specifically, the products in the load space maintained at low temperatures by each refrigerator, are not damaged. Large-scale integrated circuits (goods)
Inside, an output signal is output through a sequence as shown in FIG. 4, which takes into consideration the temperature conditions of the load space related to the refrigerator that is subject to total power amount control and power consumption control, and defrosting conditions. In this case, part (K,) (K
2) As shown in (K,), there are cases where no output signal is actually output.

That is, in FIG. 4, as in FIG. 2, 05) is a display light emitting diode, (16) is a power alarm, bet is a used power recording device, and C1! II is a ROM power system storage section, 9
9 is also a storage unit for total power consumption control, 2) is a converter for detecting the input from the power sensor (221), @ is a used power display unit, (26) is a temperature management logic, 0 is an AND logic,
□□□) is OR logic, (Q,) is stop time setting (
Q,) shows the maximum allowable power setting, (Q6) shows the power differential setting, the driver part of the relay ■, and C35) shows the power comparison part between the used power and the allowable power, □ □□) is the clock, C37) is the stop control unit,
□□□) is the display converter (El) is the total power control mechanism, (
E2) is the power consumption control mechanism, (E,) is the defrost signal (E,
) indicates a temperature signal, and under such a sequence, if an output signal is output from the total electric energy control mechanism (El) at fixed time intervals to the current electrical equipment, the load related to this electrical equipment When the temperature output signal (E4) has not been output for a certain period of time after the temperature of the space has fallen below the set temperature written in advance in the ROMQS, and
If this electrical device is not related to shin removal, or if it is related but not defrosted, the output signal from the temperature control logic (26) is output, so it receives the output signal from the OR logic 4331. The A N D logic c321 outputs an output signal to activate the driving parts, indicates the stoppage of the electrical equipment by controlling the total amount of electric power, and displays the light emitting diode (+51), and also turns off the relay (3) to stop the electrical equipment. This is to stop the device for the set time written in the ROM product.Also, this operation is performed by the power consumption control mechanism (E2).
The same is true for the output signal from.

That is, according to this sequence, the electrical equipment to be controlled by the control mechanism is a refrigerator, and the defrosting signal (E,
) and temperature signal (E4) are not output, but an output signal is output from the temperature management logic (26), and when an output signal is output from the total power consumption control mechanism (El) at regular intervals, , set time OR logic (g) to AND logic (, 37J inputs a signal, and the operation of the refrigerator is stopped for the set time. Also, if the refrigerator is being defrosted or has just been defrosted, Therefore, when the temperature of the product storage area, which is a load space, has just reached the set temperature, the defrost signal (
E, ) and the temperature signal (E4) do not enter the AND logic 021, so even if the signal from the control mechanism CB, )CF2) is output via the OR logic c33), the AND logic 432) will not operate. After all, the compressor of the refrigerator does not enter the total power consumption control until the next total power consumption control cycle, and the temperature management logic (26, 1
The compressor will not be stopped by power consumption control unless the condition is such that an output signal is output from the compressor.

As described above, when controlling electrical equipment including a plurality of refrigerators or air conditioners, the power supply control device according to the present invention forcibly controls the electrical equipment for a set time at regular intervals by the operation of the total power consumption control mechanism. Since it is possible to reduce the power consumption of the electrical equipment, and also to stop the electrical equipment at regular intervals based on the temperature of the product, it is possible to perform temperature control based on the product temperature. It is possible to reduce the power consumption of the electrical equipment without impairing the quality of the product.

[Brief explanation of the drawing]

7 Figure 1 is a block diagram of electrical equipment showing an example of power receiving equipment in a large-scale store, Figure 2 is a block diagram showing electrical connections of the power supply control device according to the present invention, and Figure 3 also shows an overview of control. The time chart diagram, FIG. 4, is a block diagram showing an example of the load management logic of the block diagram shown in FIG. 2. (R+) (R2) ”' (RK) (RK magazine piece/
(Rn I) (Rn)...Refrigerating machine for showcase,
(3)... Freezer for air conditioning, (... Freezer for cold storage warehouse, (8)... Centralized controller, (L,) - (Ln) (L
l(Lt/Load space, (E,)...Total power consumption control mechanism, C25+...Load management logic. Fig. 4

Claims (1)

[Claims] 1. A power supply control device that controls the operation of a plurality of refrigerators, characterized by comprising a total power consumption control mechanism that forcibly stops the refrigerators for a set time at regular intervals.