JPS6042569A - 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 [Applications of the Invention] The present invention relates to a dual-base refrigerator-freezer that uses both an indirect cooling type evaporator and a direct cooling type evaporator.

[Background of the invention]

Conventional two-base refrigerator-freezers have a freezer compartment with an internal IL degree of -15 to -20°C to store frozen foods, and a freezer with an internal IL degree of -15 to -20°C.
It consists of a refrigerated room that stores general refrigerated foods.

Conventional cooling methods for this type of refrigerator-freezer include indirect cooling, in which the evaporator in the refrigeration cycle is a forced draft type, and direct cooling, in which food is cooled by bringing the food into direct contact with the evaporator.

This interior uses a combination of a cross-fin tube-shaped evaporator and a blower, distributes the cooled airflow to the freezer compartment and refrigerator compartment, and controls the temperature in each compartment using a thermostat, thermal damper, etc. It cools food by heat transfer. In the latter case, the evaporator is box-shaped, and this forms the direct freezing chamber, which is cooled mainly by heat conduction, while the refrigerating chamber is provided with a separate evaporator and is cooled by natural convection.

This dual-type refrigerator-freezer can achieve each purpose by using the freezer compartment to store frozen foods that have already been frozen, and the refrigerator compartment to store non-frozen foods. In order to be economical and to avoid the hassle of cooking food at home, an economical method is to cook a large amount at once, freeze it in a freezer, and then store it, but the freezing speed of conventional freezers is low. There is a defect that the freezing point passage time is delayed, which destroys the cells of the food, causing drips to flow out and impairing the taste.

For this purpose, a method using a binary refrigeration cycle in which the temperature is lowered to around -40°C is applied industrially.
This results in a complicated structure of the reservoir requiring two sets of 4 cycles, an increase in the number of station crystallization methods, an increase in manufacturing costs, and an increase in power.

[Purpose of the 9th Embodiment] The present invention improves the above-mentioned defects by installing a direct cooling type and an intercooling type fish light in the freezer compartment, and when rapid freezing is required, a second cooling type is installed.
It uses an "IJ" evaporator to freeze in a short time.

[Summary of the invention]

4\The invention is a refrigerator having a freezer compartment and a cold room, in which a direct cooling type evaporator and an indirect cooling type evaporator are provided in the freezing compartment.

[Embodiment of the Invention] The present invention will be explained with reference to an embodiment shown in FIGS. I
! ! ! I-J freezes food in the freezer, and my father uses it to store frozen food for long periods of time. 3 is cabinet 1
It is a refrigerated storage space located in the lower part of the container, and is used for short-term storage of non-frozen quality products after 4°C O1J. 4 is a door of the freezer compartment, 4a is a handle of the freezer compartment door 4, and 4b is a backing of the freezer compartment door 4 to prevent cold air inside the refrigerator from flowing out. 5 is a refrigerator compartment door, 5a is a handle of the refrigerator compartment door 5, 5b is a backing of the refrigerator compartment door 5, and 6 is a refrigerant compressor, which is installed on the lower back side of the cabinet 1. 7 is a drain condenser that serves as a heat source to evaporate the defrosting water of the evaporator, and 8 is a main condenser, which is often placed at the back of the cabinet 1. 9 is a three-way valve, 10a is a pressure reducing device used during normal operation in which cooling is performed only with a forced draft evaporator, and 10b is a pressure reducing device used during quick freezing operation in which a forced draft evaporator and a direct cooling evaporator are operated together. , 11 is a forced draft evaporator, which is generally constructed by combining a group of fins and a group of tubes perpendicular to the fins. 12 is a flat direct cooling type evaporator, which is installed in the freezing compartment 2. 12a is a heat insulating pipe installed at the bottom of the direct cooling evaporator 12, 13 is an accumulator, and 148 to 14i are refrigerant pipes, as shown in FIG. 16a is the bell mouth of the fan 15, 16b is the cold air discharge grill of the freezer compartment 2, 16C is the cold air suction grill of the freezer compartment 2, and 16d is the cold air intake grill of the freezer compartment 3. duct, 116
e is a cold air discharge grill to the refrigerator compartment 3, 16f is a cold air intake grill of the refrigerator compartment 3, 16g and 16h are cold air return ducts configured inside the partition 1a, 17a is a shelf network of the freezer compartment 2, and 17b is a refrigerator compartment 3 shelf net, 18 drain evaporation dish, 19
is the base.

In the refrigeration refrigerator, during normal operation when preserving frozen foods and storing refrigerated foods, the pressure reducing device 10a is used.
The three-way valve 9 is operated to allow the refrigerant to pass through, and the refrigerant circuit is connected to the compressor 6 → drain condenser 7 → main condenser 8 → three-way valve 9 → pressure reducing device 10 → forced draft evaporator, generator 11 → The airflow cooled by the forced draft evaporator 11 is transferred from the cold air discharge creel 16b to the freezer compartment 2 by the fan 15, and the cold air discharge creel 16b is transferred to the freezer compartment 2.
15e can be distributed to the refrigerator compartments to cool each compartment and achieve the purpose. In this case, the direct cooling type evaporator 12 is excluded from the refrigerant circuit, so it has no cooling effect (it simply reaches a temperature equivalent to that of the freezer compartment).

On the other hand, in the freezing operation when rapidly freezing food, the three-way valve 9 is operated to allow the refrigerant to pass through the pressure reducing device 10b, and the refrigerant circuit is compressed (3-way condenser 7->main condenser 8). →Three-way valve 9→Pressure reducing device 10b→
Direct cooling evaporator 12 → forced draft evaporator 11 → accumulator 13 → return to compression view 6, inn cooling evaporator 12 is first cooled, and forced draft evaporator 11 is cooled with the remaining refrigerant. The evaporation capacity of the direct cooling evaporator 12 is smaller than that of the forced draft evaporator 11, and the conventional cooling method for normal operation and the direct cooling method are used together. That is, when food to be quickly frozen is placed on the direct cooling type evaporator 12 in the freezer compartment 2, the bottom surface of the food is cooled by heat conduction of the direct cooling type evaporator 12, and the side and top surfaces of the food are cooled by forced ventilation. The food is cooled by forced convection heat transfer by the evaporator 11 and fan 15, and the cooling rate of the food is doubled.

In addition, the freezing compartment 2 and the refrigerator compartment 3 are maintained at a constant temperature by the cooling function of the forced draft evaporator 11, and are used for preserving frozen foods.
There is no problem in preserving unfrozen foods, and rapid freezing operations can be performed many times in succession.

On the other hand, in a direct-cooled refrigerator where the entire freezer compartment is constructed with a direct-cooled evaporator, the temperature of the frozen food increases by 1' when it is heated by the heater during defrosting, causing deterioration and spoilage of the frozen food. However, since the present invention is configured as a part of the freezer compartment 2, the temperature rise during defrosting is small because the frozen food is simply moved to the shelf network 17a (there is no above-mentioned defect).

〔Effect of the invention〕

As shown below-1-, the forced draft evaporator 11 is used during qualified operation.
However, by switching to use the direct cooling evaporator 12 and the forced draft evaporator 11 in combination during quick freezing operation, food can be effectively frozen and preserved using a refrigeration cycle with a simple structure. So the effect is enormous.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional structural explanatory diagram of the refrigerator of the present invention, and FIG. 2 is a configuration diagram of a refrigerant circuit of the refrigerator of the present invention. 1...cabinet, la...inner partition, 2...
Freezer compartment, 3... Refrigerator compartment, 4... Freezer compartment door, 4a...
・Handle, 4b...backing, back...refrigerator door,
5a.../'t handle, 5b...backing, 6.
...Compressor, 7...Drain condenser, Main condenser, 9...Three-way valve, 10a...Pressure reducing device, 10b
... Pressure reduction device, '11 ... Forced draft evaporator, 12
...Direct cooling type evaporator, 12. ...Insulation material, 13...
Accumulator, 14a-14j... Refrigerant piping, 1
5...Fan, 16a...Bellmouth, 16b...
・Cold air discharge grill, 16C...Cold air intake grill, 16
d...Duct, 16e...Cold air discharge grill, 16f
...Cold air intake grill, 16g...Cold air return duct,
16h...Cold air return duct, 17. ...shelf network, 17
b... Shelf net, 1. Drain evaporation dish, 19..
Figure 2

Claims (1)

[Scope of Claims] 1. A refrigerator characterized in that a direct cooling type evaporator and an indirect cooling type evaporator are provided in a freezing chamber. 2. A refrigerator having a freezer compartment and a refrigerator compartment, characterized in that a direct cooling evaporator and an indirect cooling evaporator are provided in the freezing compartment.