JPS618581A - Electric refrigerator - 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 Field of the Invention The present invention relates to improvements in electric refrigerators, particularly electric refrigerators that utilize inexpensive late-night electricity.

(Background of the Invention) As is well known, the power consumption of the refrigeration device in an electric refrigerator is quite large, and together with the cooler, it becomes a large power consumption factor during the daytime of midsummer.

Therefore, if the refrigeration device of an electric refrigerator could be operated with inexpensive late-night electricity to achieve the necessary refrigeration effect during the day, it would be very beneficial to both the electric power company and the user of the electric refrigerator.

An electric refrigerator that utilizes late-night electricity was previously proposed by the present inventor in Japanese Patent Application No. 58-66244.

This allows the refrigeration equipment to operate only on late-night electricity, and allows the necessary refrigeration effect to be achieved 24 hours a day by operating the refrigeration equipment during that limited time, and concludes a late-night electricity supply and demand contract with the electric power company. This made it possible to use cheap late-night electricity.

However, if the temperature of the cold storage material in the cold storage device of the refrigeration equipment rises unexpectedly during the day, for example due to cooling a large amount of food, the refrigerator may not be able to maintain the necessary freezing capacity. There is a problem called 7) /ko.

(Object of the Invention) An object of the present invention is to provide an electric refrigerator that can operate a refrigeration device mainly using inexpensive late-night electricity, and that can reliably maintain the refrigerating capacity required for the refrigerator during the day. Our goal is to provide the following.

(Structure and Effects of the Invention) In order to achieve the above object, the electric refrigerator of the present invention includes a first power input terminal for connecting to a nighttime power supply terminal that can receive power only during a predetermined time period at night, and a first power input terminal that can receive power day and night. a second power supply terminal for connecting to the regular power supply terminal; a transformer for stepping down the nighttime power supply supplied to the first power supply input terminal to the same voltage as the regular power supply; and the first power supply terminal. A switch that is excited by the nighttime power supply supplied to the input terminal, and switches to the power supply side obtained from the transformer when the nighttime power supply is received, and to the regular power supply side obtained from the second power supply terminal when the nighttime power supply is not received. a power supply switching relay equipped with a contact; a regenerator attached to a cooler of a refrigeration device and containing a regenerator material that is cooled and solidified when the refrigeration device is operated;
When the nighttime power is received, it is detected that the temperature of the cold storage material has decreased to the first set temperature, and when the nighttime power is not received, the temperature of the cold storage material is detected to be lower than the first set temperature. It is characterized by comprising a temperature detector that detects that a set humidity has been reached, and a refrigeration device that is driven by a power source obtained through the transformer and whose energization is controlled by the temperature detector. .

According to this configuration, cheap late-night power can be mainly used as the refrigeration system which accounts for most of the power consumption of the electric refrigerator.

In addition, if the temperature of the cold storage material built into the regenerator of the refrigeration equipment rises unexpectedly during the day, the refrigeration equipment is activated by a regular horn. The refrigerating capacity can be reliably maintained.

(Description of Embodiments) Figure 1 shows 41! of a forced convection cooling type electric refrigerator to which the present invention is applied. Figure 2 shows its electrical configuration.

The inside of the kitchenette 1 is divided into a refrigerator compartment 3 and a freezing compartment 1 by a partition wall 2. A door 5 and a door 6 are attached to the refrigerator compartment 3 and the freezer compartment 4, respectively.

Compression 'a8, which is the drive source of the refrigeration system, is located at the bottom of cabinet 1, condensation 1fi9 is located outside and at the bottom of the back of cabinet 1, and cooler 10 is installed between refrigerator compartment 3 and freezing compartment 4 in cabinet 1. It is located slightly above and in the back of the compartment.

A regenerator 11 according to the present invention is disposed around the cooler 10 so as to surround it.

Inside the regenerator 11, a regenerator material having a freezing point of about -15 to -25° C. and a large heat of fusion, such as an aqueous solution of calcium chloride, is stored.

During operation of the refrigeration system, the cooling action of the cooler 1o first acts directly on the regenerator 11, and the regenerator material within the regenerator 11 is cooled and solidified. The cooling effect of the cooler 10 extends into the refrigerator via the regenerator 11.

A fan 13 driven by a motor 12 is disposed above the cooler 10 and the regenerator 11, and the rotation of the fan 13 moves the cold air around the cooler 10 and the regenerator 11 in the direction indicated by the arrow in the figure. As shown, forced convection circulation occurs. The convection of cold air by the fan 13 is not limited to the freezer compartment 4 (
It also covers 3 refrigerator compartments.

However, the freezer compartment 4 near the cooler 10 and the regenerator 11 is frozen more strongly, and the temperature of the refrigerator compartment 3 does not drop much.

The electric system of the electric refrigerator of the present invention includes a power supply system, a drive system for the refrigeration system that operates using electricity late at night, and a drive system for the fan motor 12J5 and the interior light 14 that are constantly supplied with power. Broadly classified.

Power supply system (J, night power supply (e.g., single-phase 200V) that can receive power only during certain hours at night), terminal 31゜31, regular power supply that can receive power day and night (e.g., single-phase 100V>terminal 32,
32. A transformer 3 for stepping down the power supply voltage supplied to the night power terminal 31゜31 to the same voltage as the regular power supply.
0 and night power supply terminals 31, 31, and switches the power source to the power source side obtained by the transformer 30: 1, the relay 2 that switches the power source to the regular power source side.
It consists of 0 and 7) 11.

Further, a heater 33 is provided on the primary side of the transformer 30, and the heater 33 changes the operating temperature of a temperature control contact 40 installed in the regenerator 11 and functioning as a temperature detector. A heater 33 is attached to surround the temperature control contact.

In other words, the compressor 8 is powered by a regular power supply (for example, single-phase 100cm)
When the temperature control contact 4o is driven by, for example, the operating temperature (set temperature) of the temperature control contact 4o is set to be off at -15°C, and the temperature control contact 4o is driven by the power source obtained from the secondary side of the transformer 30. In this case, the operating temperature of the temperature adjustment contact 40, that is, the temperature at which the contact 4o turns off, is changed to, for example, -25° C. by energizing the heater 33.

The compressor 8, which is the drive source of the refrigeration system, is connected to the movable contacts 20B and 20C of the relay 20 via a temperature regulator contact 40 provided in the regenerator 11. During the late night power supply period, the excitation coil 20Δ of the relay 20 is excited, the movable contacts 20B and 20C are switched to the power input terminals 21B and 23C on the secondary side of the transformer 30, respectively, and the heater 33 Temperature regulator contact 40
The temperature of the temperature is set at -25°C. 'In this state (the temperature inside the regenerator 11 has not fallen to the set temperature of -25℃, for example, the 4-stone regulator contact/IO
When the compressor 8 is in the off state, the compressor 8 is driven and the refrigeration system is operated. The compressor 8 is driven until the temperature of the regenerator 11 becomes sufficiently low and the temperature regulator contact 40 is turned off.

7I That is, by operating the refrigeration system during this period, the cooler and the regenerator 11 are sufficiently cooled, and the regenerator material in the regenerator 11 is solidified.

On the other hand, outside of the predetermined late-night horn supply hours, relay 2
The excitation coil 2OA of 0 is not energized, and the heater 33
Since the movable contacts 20B of the relay 20 are not energized,
20C is switched to the power input terminals 22B and 24C connected to the common power supply terminals 32 and 32, respectively, and the compressor 8 is driven by the common power supply via the temperature regulator contact 40. In this case, since the set temperature of the temperature regulator contact 4o is not heated by the heater 33, the set temperature operates so as to be turned off at -15°C. Therefore, during the day, the compressor 8 is not driven unless the temperature inside the regenerator 11 reaches a temperature higher than 115°C.

Next, we will explain a system that is driven by the same regulations regardless of day or night. The interior light 14 is turned on when the door 5 on the side of the refrigerator compartment 3 is opened and the door switch 35 is set to the open position.

Further, when the door 5 is closed and the door switch 35 is in the closed position, and the door 6 on the freezer compartment 4 side is also closed and the door switch 36 is in the on state, the temperature inside the refrigerator rises to a certain degree. When the internal temperature regulator contact 37 installed at an appropriate position in the refrigerator turns on (the contact 37 turns off when the internal temperature reaches 2 to 8°C), the fan motor 12 is driven, and the fan 13 rotates to cause cold air to circulate inside the refrigerator 1, thereby promoting freezing inside the refrigerator.

Furthermore, the heater 50 for preventing freezing of the train pipe is constantly supplied with power.

As explained above, according to this embodiment, the refrigeration system can be operated mainly with inexpensive late-night electricity,
In addition, even if the temperature inside the refrigerator rises unexpectedly during the day, the freezer compartment equipment is configured to operate using regular electricity, ensuring that the necessary refrigeration capacity of the refrigerator is maintained during the day. be able to.

In this embodiment, in order to effectively utilize late-night power, the operating temperature of the temperature controller contact 40 provided in the cold storage device 11 is made different during the daytime and late at night; Although the temperature regulator contact 40 is configured to be heated at a deep temperature, the temperature controller contact 40 is not limited thereto, but is not limited thereto, and as shown in FIG. Regulator contacts 102, 104
Compressed IF via relay contact 100B! Power input terminal 3 that can be connected in series with I8 and can receive power only during specified hours at night.
The same effect can be obtained by switching the relay contact 100B by excitation of the relay coil 100A connected between 1° and 31° to set the temperature controller in the regenerator 11 at a different value depending on whether it is late at night or during the day. is obtained.

[Brief explanation of drawings]

Fig. 1 is a structural diagram of an electric refrigerator to which the present invention is applied;
The figure is an electrical system diagram of an electric refrigerator according to the present invention, and FIG. 3 is an electrical system diagram showing the configuration of main parts of another embodiment of the present invention. 1... Cabinet 2... Partition wall 3... Refrigerator room 4... Freezer room 5.6... Door 8... Compressor 9... Compression room 10... Cooler 11 ...Cold storage sea lion, 12...Fan motor 13...Fan 14...Interior light 20...Relay 31...Night power supply terminal 32...General power supply terminal
・ . 33...Heater ゛35.36...Door switch 40...Temperature regulator contact

Claims (1)

[Claims] (1) A first power input terminal for connecting to a nighttime power supply terminal that can receive power only during a predetermined time period at night; a second power supply terminal for connecting to a regular power supply terminal that can receive power day and night; a transformer for stepping down the nighttime power supply supplied to the power supply input terminal to the same voltage as the regular power supply; a transformer that is excited by the nighttime power supply supplied to the first power supply input terminal and that lowers the voltage of the nighttime power supply when receiving the nighttime power supply; a power supply switching relay equipped with a switching contact that switches to the power supply side obtained from the refrigeration unit and to the regular power supply side obtained from the second power supply terminal when power is not received at night; attached to the cooler of the refrigeration equipment; a cold storage device containing a cold storage material that is cooled and solidified during operation of the device; detecting that the temperature of the cold storage material has decreased to a first set temperature when the nighttime power is received; and when the nighttime power is not being received; a temperature detector for detecting that the temperature of the cold storage substance has reached a second set temperature higher than the first set temperature; An electric refrigerator comprising a refrigeration device whose electricity is controlled.