JPH0370961A - Method of controlling operation of refrigerator - Google Patents

Abstract

PURPOSE:To rapidly cool a refrigeration chamber and simultaneously cool a storage chamber by cooling the refrigeration chamber by air cooled by a vaporizer, and then branching the air flow to a duct and a blow-off outlet by driving a plurality of fan devices. CONSTITUTION:A duct is opened at its one end and a blow-off outlet 15 is disposed on the downstream side of a refrigeration chamber 7, and the refrigeration chamber 7 is first cooled by air cooled by a vaporizer 10. The cooled air is divided into two flows to a duct 14 and the blow-off outlet 15 by driving a plurality of fan devices 11A, 11B. The amount of the air led to a storage chamber 8 is more reduced than that in the refrigeration chamber 7 to more reduce the refrigeration capability of the storage chamber 8 compared with the refrigeration chamber 7. Hereby, the refrigeration chamber 7 can be rapidly cooled and simultaneously the storage chamber can be cooled.

Description

[Detailed Description of the Invention] [Object of the Invention] Industrial Application Field The present invention relates to a freezer compartment and a temperature selective storage compartment that is maintained in one of the freezing, refrigerating, and freezing temperature ranges. The present invention relates to a method for controlling the operation of a refrigerator that performs cooling at the same time.

Conventional technology A specification selection room that is selectively set to one of the freezer room specifications, chilled room specifications, and refrigerator room specifications (the temperature range is freezing (chilled is related to refrigeration), and the specification selection room that is set to one of the freezing room specifications and chilled room specifications and other specifications. It is equipped with a switching chamber that can be switched to either one, and supplies cold air to the specification selection chamber and the switching chamber through a common cold air supply duct, and adjusts the amount supplied to the specification selection chamber and the switching chamber to the respective set specifications. Japanese Unexamined Patent Application Publication No. 62-255777 discloses a system in which control is performed accordingly. In this publication, when the switching chamber is set to the quenching chamber specification, the supply of cold air to the specification selection chamber is stopped.

Problems to be Solved by the Invention In the above technology, cold air is supplied to the specification selection room and the switching room through a common cold air duct, and when the switching room is set to the quenching room specification, the cold air is supplied to the specification selection room. Since the supply is stopped, the temperature of the specification selection chamber cannot be controlled when the quenching chamber specification is set. Therefore, in the case of a quenching chamber specification, there was a problem in that although the specification selection chamber could be used as an article storage chamber, it could not be used as an article cooling storage chamber.

SUMMARY OF THE INVENTION Therefore, the present invention provides a refrigerator and an operation control method thereof that can cool and temperature control not only the freezer compartment but also the storage compartment when rapidly cooling the freezer compartment.

[Structure of the invention]

Means for Solving the Problems The present invention provides a storage compartment and a freezing compartment that are partitioned by a partition plate arranged inside the refrigerator, an evaporator and a plurality of blowers arranged in the freezing compartment, and A duct with one end open and the other end open on the upwind side of the evaporator, an air outlet located on the leeward side of the freezing compartment that communicates the storage compartment and the freezing compartment, and a blower. The suction port is provided to communicate the storage compartment and the freezing compartment, and the temperature setting part sets the temperature of the storage compartment. The present invention provides a method for controlling the operation of a refrigerator by stopping a blower device adapted to the above.

The air cooled by the evaporator first cools the freezer compartment, and then is divided into two parts: one that returns to the upwind side of the evaporator, that is, the air inlet side, through a duct, and the other that is guided into the storage room from the air outlet. . Therefore, the air used to cool the freezer compartment and heat exchanged in the freezer compartment is led to the storage compartment to cool the storage compartment. Further, when the temperature is lower than the temperature set by the temperature setting section, the operation of the air blower disposed corresponding to the suction port is stopped, and the forced introduction of cold air into the storage room is stopped.

Example Embodiments of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a refrigerator, and in this example, a mobile refrigerator called a cold roll box, which is used when transporting articles while cooling them on a transport vehicle such as a truck, will be explained as an example.

The refrigerator 1 is equipped with wheels 2 for movement at the bottom, has an insulating box 4 with an opening 3 formed on the side, and an insulating door 5 that closes the opening 3 by opening and closing the opening 3. A freezing room 7 and a specification selection room 8 as a storage room are partitioned by a plate 6.

An evaporator 10, a plurality of air blowers 11, and an article storage section 12 are arranged in the freezer compartment 7. In this example, the air blower 11 is for two evaporators driven by an AC power source (not shown). 1 driven by the blower device 11A and the DC power supply 35
It consists of two internal air circulation blowers 111B. A duct 14 is disposed along one wall of the freezer compartment 7, that is, the ceiling wall 13, and has one end opened on the leeward side of the article storage section 12 and the other end opened on the windward side of the evaporator 10. 15 is the partition plate 6
The air outlet 16 formed on the leeward side of the article storage section 12 is a suction port formed on the partition plate 6 in correspondence with the blower device 11B for internal air circulation.

The evaporator side part of the internal air circulation blower 11B is designed not to suck in the air that has passed through the evaporator, and also to move the air from the specification selection chamber 8 sucked in from the suction port 16 to the evaporator side. A partition plate 17 is provided to prevent this from occurring. Further, the sizes of the suction port 16 and the blowout port 15 are set so that the amount of air sucked in from the suction port 16 and the amount of air blown out from the blowout port 15 are approximately the same.

Reference numeral 18 denotes an inner door made of a transparent material that freely opens and closes the article entrance/exit of the article storage section 12.

A machine room 20 houses a compressor, a condenser, a blower for the condenser, and the like.

Reference numeral 30 denotes an operation section serving as a temperature setting section for selecting the internal temperature of the specification selection chamber 8 to any one of freezing temperature, ice temperature temperature, and refrigeration temperature. A temperature regulator 31 for freezing, which is placed at a suitable location in the selection chamber 8, opens and closes at -15°C, a temperature regulator 32 for ice temperature, which opens and closes at 0°C, and a temperature regulator 33, for refrigeration, which opens and closes at 5°C. The corresponding temperature controller is selected to control the operation/stop of the internal circulation blower 11B.

A freezer temperature regulator (not shown) is disposed within the article storage section 12, and the operation of the compressor is stopped when the temperature reaches a predetermined temperature, for example, -25°C or lower.

Note that the evaporator blower 11A operates continuously.

In addition, although this example shows an example in which each temperature regulator is configured with a thermostat, a thermistor is placed in each of the freezing compartment 7 and the specification selection compartment 8, and the detection signal from each thermistor is
The operation/stopping of the compressor and the internal circulation blower device 11B may be controlled in accordance with the temperature set by the operation unit (specifically, one of freezing, refrigeration, and ice temperatures).

Based on the above configuration, cooling of the freezing chamber 7 and the specification selection chamber 8 will be explained. However, freezing room 7 and specification selection room 8
Assume that the inside is not cooled.

Assuming that the freezing temperature is selected using the operation unit 30, the freezing temperature regulator 31 is selected by this selection operation (sixth
(see figure). Then, when a cooling operation switch (not shown) is pressed, the compressor/reblowing devices 11A and IIB start operating. Therefore, the inside of the article storage section 12 is gradually cooled by the air cooled through the evaporator 10.

At this time, the air blown to the leeward side of the article storage section 12 is divided into two types: (a) which is guided to the windward side of the evaporator 10 via the duct 14 (see the dotted chain arrow in Fig. 5); ) It is introduced into the specification selection chamber 8 from the Suita port 15 and introduced into the freezer compartment 7 again from the suction port 16 (see the broken line arrow in FIG. 5).

The device that forcibly causes the air flow shown in (a) is the internal circulation blower 11B, and this air flow gradually cools the interior of the specification selection chamber 8. When the temperature drops below the opening operation temperature (in this example, it is set at -16°C), the contacts of the temperature controller 31 become open, and the operation of the internal circulation blower 11B is stopped. Forced cold air convection will stop (Suita Exit 1)
5, the cold air still enters the specification selection chamber 8 by natural convection).

Since the cold forced convection in the specification selection chamber 8 is stopped, the interior of the specification selection chamber 8 is not cooled, and the temperature gradually rises. Then, the return operating temperature of the temperature regulator 31 (in this example, -14°
C) When the temperature becomes higher than
Cooling is performed by forced convection. Thereafter, the above-described operations are repeated to maintain the specification selection chamber 8 at the set temperature.

On the other hand, since cold air is led from the outlet side of the article storage section 12 through the duct 14 to the air inlet side of the evaporator 10,
This duct 14 acts as a bypass passage for cold air and promotes cooling of the article storage section 12. In particular, if the cold air flow rate according to (a) is made larger than the cold air flow rate according to (b), cooling of the article storage section 12 will be promoted.In addition, the article storage section 12 will be gradually cooled, When the temperature drops below the opening operation temperature (in this example, it is set at -26°C), the contacts of the temperature controller open and the compressor stops operating, so cooling of the freezer compartment 7 stops. The evaporator blower 11A continues to operate.Since the compressor stops, the refrigerant supply to the evaporator 1o stops, so the freezer compartment 7
Supercooling of can be prevented.

Then, the return temperature of the freezer compartment temperature controller (in this example -24
When the temperature exceeds "C), the contact point of the temperature regulator is closed and the compressor is operated again to cool the freezer compartment. The above-mentioned operation is then repeated to cool and maintain the freezer compartment 7 at the set temperature.

On the other hand, when the ice temperature or refrigeration temperature is selected using the operation unit 30, the ice temperature controller 32 or the refrigeration temperature controller 33 corresponding to this temperature range is selected in the same way as described above, and the respective temperature controllers are selected. The contacts are opened and closed at the temperature set by the temperature controller to control the operation and stop of the internal circulation blower 11B, and the temperature inside the specification selection chamber 8 is maintained at the temperature selected by the operation unit 30. (details omitted).

As detailed above, according to the present invention, by arranging the opening at one end of the duct and the air outlet on the leeward side of the freezing compartment, the freezing compartment is first cooled by the air cooled by the evaporator.
By dividing the air that has cooled the freezer compartment into ducts and air outlets by driving multiple blowers, the amount of air introduced into the specification selection room, that is, the storage compartment, is reduced compared to that of the freezer compartment. The cooling capacity of the storage room can be made smaller than that of the storage room. In addition, it is possible to cool the storage compartment while rapidly cooling the freezer compartment. In addition, by controlling the air blower placed in correspondence with the suction port based on the relationship between the temperature of the storage room and the set temperature, after the air blower is stopped, the cold air from the outlet of the freezer compartment is controlled. We are trying to maintain the set temperature in the storage room by limiting it to natural convection.

〔Effect of the invention〕

As detailed above, according to the present invention, by arranging the opening at one end of the duct and the air outlet on the leeward side of the freezing compartment, the freezing compartment is first cooled by the air cooled by the evaporator.
By dividing the air that has cooled the freezer compartment into ducts and air outlets by driving multiple blowers, the amount of air introduced into the storage compartment can be reduced compared to that of the freezer compartment. The cooling capacity of the storage room can be reduced.

In addition, it is possible to cool the storage compartment while rapidly cooling the freezer compartment. In addition, by controlling the air blower placed in correspondence with the suction port based on the relationship between the temperature of the storage room and the set temperature, after the air blower is stopped, the air blower will flow from the freezer compartment through the air outlet into the storage room. Only cold air is guided by natural convection, which can suppress the temperature rise in the storage room.

[Brief explanation of drawings]

Each figure shows an embodiment of the present invention, and the first figure is a cross-sectional view of the freezer compartment, the second figure is a perspective view of the external appearance of the refrigerator, and the third and fourth figures are views of the refrigerator with the top wall attached. Figure 1 is a sectional view along A-A and a partially cutaway sectional view along B-B, Figure 5 is a schematic cross-sectional view showing the flow of cold air in the freezer compartment, and Figure 6 is a schematic circuit diagram of a blower device for internal air circulation. be. DESCRIPTION OF SYMBOLS 1... Refrigerator, 6... Partition plate, 7... Freezer room, 8... Storage room, 11... Air blower, II
A... Air blower for evaporator, IIB... Air blower for internal circulation, 14... Duct, 15... Air outlet, 16... Suction port, 30... Temperature setting section.

Claims (1)

[Claims] 1. A storage room and a freezing room separated by a partition plate placed inside the refrigerator, an evaporator and a plurality of blowers placed in the freezing room, one end of which is opened on the leeward side of the freezing room, and the other end is opened on the leeward side of the freezing room. A duct opened on the windward side of the evaporator, an air outlet located on the leeward side of the freezing compartment and communicating the storage compartment and the freezing compartment, and a storage space provided corresponding to any one of the blower. A suction port that communicates between the storage compartment and the freezing compartment, and a temperature setting unit that sets the temperature of the storage compartment, and corresponds to the suction port when the temperature of the storage compartment becomes equal to or lower than the temperature set by the temperature setting unit. A method for controlling the operation of a refrigerator by stopping a blower when the air blower is turned on.