JPS599471A - Freezing-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 The present invention relates to a forced convection type refrigerator-freezer using a non-azeotropic mixed refrigerant as a refrigerant. By focusing on the fact that due to changes in evaporation temperature, the cooler inlet shows a lower temperature and the outlet part shows a higher temperature, we construct an efficient cooler and provide freezers and refrigerators that operate efficiently. It is intended to.

Embodiments of the present invention will be explained below with reference to FIGS. 1 to 5.

First, in Fig. 1, (1) is the refrigerator body.

The freezer compartment (2) is equipped with a heat exchanger (3) and a fan (4) that forcibly circulates the cold air generated by the heat exchanger (3), and has a cold air outlet (5) and an inlet (6). fankrill+
At 71, the cooler (3) and fan (4) are connected to the freezer compartment (
2), a mouth case (9) having a bell mouth part (8) that covers the periphery around the rotation axis of the fan and communicates with the cold air outlet (5) of the fan grill (71); A fan grill (71) is provided along the inner wall surface. (lI is a duct for blowing cold air to the refrigerator compartment (II) passing through the back of the heat exchanger (3).

The entrance H of the duct is communicated with the mouse case (9). (II is a suction duct for cold air from the refrigerator compartment (111) placed in the divider (14) that partitions the freezer compartment (2) and the refrigerator compartment (II).

Freezers and refrigerators with such a configuration are filled with a non-azeotropic mixed refrigerant, and the evaporated air (3) is not aligned with the center line in the fin row direction, that is, in the cold air flow direction, as shown in Figures 2 and 8. A slit θ0 is inserted, and the non-azeotropic mixed refrigerant flows upwind from the leeward side of the path on the first row side where the heat conduction is divided by the fan grill l, and then enters the leeward side of the passive side and flows upwind. The refrigerant path is configured as follows.

Next, to explain the function of the heat exchanger in the above configuration, first, as a circulation path for cold air, the cold air heat exchanged by the heat exchanger (3) is connected to the fan (4) and the mouse case (9).
) is sent separately to the freezer compartment (2) and refrigerator compartment +111 to cool each compartment, but the cold air distributed to the freezer compartment (2) is sent to the cold air outlet (5) of the fan grill (7). ), circulates within the freezer compartment (2), and enters the suction port (6). In addition, the cold air distributed to the refrigerator compartment αη is
The cold air is sent into the refrigerator compartment through the cold air blowing duct On to the refrigerator compartment (+11) connected to the mouth case (9), circulates within the refrigerator compartment αθ, and sucks cold air from the refrigerator compartment αl. daku) (enter la.

The cold air distributed to the refrigerator compartment 0υ that entered the suction duct) Ql and the cold air distributed to the freezer compartment (2) that entered the suction port (6) of the fan grill (7) are The two converge at the outlet α of the suction duct, pass through the heat exchanger again, and undergo heat exchange there, repeating the circulation.

As mentioned above, the non-azeotropic mixed refrigerant is used at the heat exchanger inlet portion (8a) where the temperature changes under the same pressure condition.
), and the temperature is high at the outlet part (8b), but if the low temperature inlet part (8a) is upwind with respect to the high temperature outlet part (8b), that is, the temperature is high at the outlet part (8b), [7] If the flow is parallel, as shown in Fig. 4, the outlet temperature Ta2 is the outlet temperature of the heat exchanger, which is the high temperature TR2.
It cannot be lowered below, and the temperature efficiency will not be satisfactory.

According to this embodiment, by having the slit H in the first fin row direction, that is, in the cold air flow direction, it is possible to eliminate the influence of the temperature of the high temperature side path on the low temperature side, prevent the fin temperature from rising, and In No. 2, since each path divided by the fin slits is made to flow in a direction opposite to the flow of cold air, the temperature change of the cold air becomes as shown in FIG. In other words, since there are counterflows in each pass, the high temperature pass, and the low temperature pass, the cold air can be efficiently lowered (T cocoon TaMt)
They are mixed at the exit and sent to the freezer and refrigerator compartments. (Ta
, ) >'ra, = "'juice'purchase") Eighth, although the temperature range of freezers and refrigerators is always operated in the frosting range,
In addition to the fact that the refrigerant path is divided into a high temperature side and a low temperature side, as mentioned above, the evaporation temperature increases as evaporation progresses.

The dehumidification of the cold air progresses as it passes through the heat exchanger, and in the lowest temperature region of each pass, it becomes cold air with a low temperature. For this reason, frost develops slowly.

Furthermore, under low temperature and high humidity conditions, frost builds up in the low temperature area of the low temperature pass, or breaks off, and advances to the high temperature pass, so even if the low temperature pass is clogged, the high temperature pass gradually becomes colder, preventing frost formation. As a result, you will be able to maintain efficient operation for a long time.

As explained above, the present invention is a forced convection refrigerator-freezer using a non-azeotropic mixed refrigerant, in which the heat exchanger is configured such that a slit is provided on the center line in the flow direction of cold air, which is the row direction of the fins. In addition to preventing the temperature rise of the fins due to the evaporation temperature difference, the cool air on the one row side of the path divided by the fin slits is directed from leeward to upwind, and then placed on the leeward side of the passive arm and moved upwind. Let it flow. In other words, since each pass has countercurrent flow, efficient heat exchange is carried out, and frost formation is also gradual, making it possible to maintain efficient operation for a long time, which is a great practical effect.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a longitudinal sectional view showing the refrigerator-freezer of the present invention, FIG. 2 is a front view showing the main parts of FIG. 1, and FIG. 8 is a side view of FIG. 2.
FIGS. 4 and 5 are temperature change characteristic diagrams of refrigerant and air according to the present invention. (1) is the refrigerator itself, (2) is the freezer compartment, and (3) is the evaporator. (8a) is the refrigerant inlet, (8b) is the refrigerant outlet, (
4) is a fan, (5) is a cold air outlet, (6) is an inlet,
(7I is fan grill, fil is bellmouth m, (9
) U mouse case, H is blow-off duct) 1111 is refrigerator compartment,
αno is the inlet of the blow-off duct, 1 is the suction duct), (14) is the divider, H is the suction duct outlet, and αe is the slit of the fin. Agent Shin Kuzuno - (7) Figure 1 To! ! To the smoker

Claims (1)

[Claims] In a forced convection refrigerator-freezer using a non-azeotropic mixed refrigerant, a slit is provided in the center line of the cold air flow direction of the heat exchanger consisting of hairpin tubes and fins, and the flow of the non-azeotropic mixed refrigerant is controlled by the wind flow. In contrast, the heat exchanger is characterized in that the heat flows from the leeward side of the first row formed by the slits of the fins to the windward side, and furthermore, the leeward side of the passive side is placed in the leeward side and flows to the windward side. A refrigerator with a refrigerator.