JPS5845479A - Freezing refrigerator for automobile - 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 It is possible to cool canned drinking water, etc., or to make ice, in combination with or independently of an air conditioning cycle.

In recent years, so-called wagons have been used for a variety of purposes as leisure vehicles. Furthermore, since there are 6 to 8 people on board, ice is often needed to cool drinks, towels, etc. while driving, and when camping.

The present invention has been devised to meet the above-mentioned needs, and provides a refrigerator-freezer for automobiles that can effectively perform a refrigeration function for refrigerating canned drinking water, etc., and a freezing function for making ice, within a single box body. The purpose is to

According to a preferred embodiment of the present invention, a blower fan, a fan drive motor, and a fan casing are installed in the box body, and a constant pressure expansion valve, a pressure switch, an evaporator, a check valve, etc. are provided in the ventilation path for cooling. A mechanism is installed to convert the air blown from the fan into cold air by passing it between the fins attached to the evaporator for refrigeration, and then blowing this air onto the object to be cooled, such as a cola can, to cool it.

Furthermore, the freezer operates at the same time as the refrigerator, and the inside of the tube of the evaporator for freezing is heated at, for example, 0.5 kg/cj (-21'
By lowering the pressure to a low pressure (equivalent to C), the water in the ice tray placed on the tube of the freezing evaporator section can be converted into ice.

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 shows a refrigeration cycle when the present invention is implemented in combination with a twin cooler for a wagon. A compressor 100 is driven by an automobile engine (not shown) via an electromagnetic clutch 101, and the compressor 100 is driven by an automobile engine (not shown). The refrigerant is liquefied by the condenser 102, passes through the receiver 103, and then passes through a circuit including the electromagnetic valve 104a, expansion valve 104b, and evaporator 104C of the front cooling unit 104, and the rear cooling unit 105.
Solenoid valve 105a, expansion valve 105b, evaporator 105G
, a constant pressure expansion valve 106 for freezing and refrigeration, and a pressure switch 107. Refrigeration evaporator 108° check valve 10
After passing through any of these three circuits, it returns to the compre-nosa 100. The front side cooling unit 104 has a blower 10 in addition to the above equipment.
In addition to the blower 105d and the like installed at the lower part of the instrument panel at the front of the passenger compartment of the wagon, the air blower 105d and the like are installed under the floor behind the passenger seat in the passenger compartment.

The evaporator 108 for freezing and refrigeration will be described later.

It is divided into a freezing evaporator 108a and a refrigeration evaporator 108b, the former 108a being installed in the freezing compartment 110, and the latter 108b being installed in the refrigeration compartment 111.

Inside this refrigerating room 111, there is an air blower Ill 12. A temperature sensor 113 made of a thermistor is installed. The temperature sensor 113 is installed in the chamber 111 at a location where it is not directly exposed to the blown air flow (in the example shown in FIG. 4, it is placed in a notch in the box l).

115 is a control device, and temperature sensor 113. The inside of the refrigerator compartment 111 is maintained at a predetermined temperature (for example, 5° C.) by intermittently controlling the operation of the air blower ml l 2 according to the detected temperature. Further, the control device 115 operates the solenoid valve 10 by operating its built-in time limit circuit and intermittent operation of the pressure switch 107.
It also functions to open and close 4a and 105a. That is, in FIG. 2, the vertical axis shows the pressure P in the refrigeration evaporator 108, and the horizontal axis shows the time t.To explain this FIG. It closes when the pressure reaches 1.5 kg/cd or more, and the pressure switch 107 remains open until the pressure P rises to the set pressure, so the control device 115
The solenoid valves 104a, 105a are energized through the solenoid valves 104a, 105a.
At this time, the evaporation pressure in the circuits of the cooling units 104 and 105 is increased to a pressure of 2 kg/cd or more by the action of the temperature-operated expansion valves 104 b and 105 b. On the other hand, the opening pressure of the constant pressure expansion valve 106 in the freezing/refrigeration circuit is set to, for example, 0.5 kg/c+J (corresponding to the refrigerant evaporation temperature of -21°C), so it is in the closed state, and the freezing/refrigeration circuit is kept closed. Refrigerant does not flow through the circuit. And the pressure P of the freezing and refrigeration side circuit
rises above 1.5 kg/cd, or the opening time of the solenoid valves 10'4a and 105a exceeds the set time (
If the operation continues for more than one minute, for example, the control device 115 cuts off the power to the solenoid valves 104a and 105a, and the solenoid valves 104a and 105a close. As a result, the pressure P in the freezer/refrigerator side circuit rapidly decreases, the constant pressure expansion valve 106 opens, and the refrigerant flows into the freezer/refrigerator side circuit. This state continues for a set time (for example, 15 seconds), and when this set time has elapsed, the control device 115 again controls the solenoid valves 104 a,
105a is energized, and the solenoid valves 104a, 105
a opens. In this way, the control device 115 controls the solenoid valve 1.
By opening and closing 04a and 105a, refrigerant flows alternately into the cooling unit side circuit and the freezing/refrigerating circuit, and the cooling effect and evaporation in the vehicle interior by the cooling unit 104 and 105 are achieved.
0B performs a freezing action in the chamber 110 and a refrigeration action in the room 111.

3 and 4 illustrate the specific structure of the refrigerator-freezer according to the present invention, and the box 1 of the refrigerator-freezer according to the present invention has double resin members 23a and 23b made of polyethylene, polyprolene, or the like. It has a so-called double wall structure. Furthermore, a heat insulating material 22 such as hard polyurethane is injected between the double walls to improve heat insulation properties. box l
Similarly, a door 2 having a double wall structure and a heat insulating material such as hard polyurethane is connected by a hinge 3 so as to be openable and closable, and the hinge 3 is fixed with screws 24. Further, a rubber member 25 having a built-in magnet 25a is fixed to the peripheral edge of the door 2 in a U-shape.
is securely attracted and fixed to the iron plate 26 fixed to the opening end surface of the box body 1 by magnetic force. The bottom of the box body 1 is formed into a stepped shape, and the air suction grid 11 is fixed on the step 1a, and the step 1b, 1
．． A cold air passage 27 through which air sucked from the grid 11 flows is formed between the spaces c. As shown in FIG. 5, the evaporator storage case 15 has a double wall structure made of polyethylene or polypropylene, and is inserted into the grooves 1d and le of the box l. This case 15 is formed into a substantially U-shape, and a freezer compartment 110 is provided on the front side of this case 15.
An opening 15a is opened and the freezer door 16 is opened and closed. A magnet 28 is fixed to the case 15 and the connected storage door 16 by a hinge 32, and the freezer door 16 is fixed by magnetic force to an iron plate 30 attached to the case 15 with screws 29. Note that a lattice 31 is formed on the upper front surface of the case 15 extending to the front of the refrigeration evaporator section 108b, so that air from the blower 112 can pass therethrough.

The evaporator 10B housed in the case 15 has a structure as shown in FIG. It is composed of a series of main tubes bent in a meandering manner, and a refrigerant inlet vibrator TOAC and a refrigerant outlet vibrator 108d are connected to both ends thereof. Furthermore, corrugated fins 8 are provided in the refrigeration evaporator section 108b so as to efficiently cool the air from the blower 112. The freezer compartment 110 is constructed by reducing the pressure of the refrigerant passing through the main tube to a low pressure of about 0.5 kg/aj to create an ice tray 13 placed on the main tube. II. Water etc. in the ice cap 17 can be used to make ice.

A pressure switch 107 connected to the refrigerant inlet vibe 108c of the evaporator 108. Constant pressure expansion valve 106. Also, the check valve 109 and the like connected to the refrigerant outlet vibrator 108d are all housed within the box body 1. Refrigerant pipes 18 and 19 each protrude outside the box 1 and are connected to the refrigeration cycle shown in FIG. The check valve 109 controls the refrigerant pressure in the refrigerant pipe 19 on the spool 1 side to 0.5 kg/cm set by the constant pressure expansion valve 106.
-The structure is designed to prevent the refrigerant from flowing backwards if the temperature exceeds . Fan casing 112a of blower 112
are integrally molded on the upper and lower surfaces of the box body 1 using a resin member 23b. The bell mouth portion 112b on the suction side has a shape as shown in FIG.
12C to the inner resin member 23b of the box body 1. This bell mouth portion 112b has a plurality of boss portions 11.
2h, to which the bracket of the motor 112d is fixed with screws 112e. A fan 112f of the blower 112 is fixed to a shaft 112g of a motor 112d. The inlet opening on the lower surface of the fan casing 112a communicates with the cold air passage 27 and sucks air as shown by the arrow in FIG. 4, and the outlet opening opens in the air passage ( 8 corrugated fins)
is connected to.

The box body 1 is equipped with a hinge ld integrally molded with resin, and by being able to open and close at the position of this hinge pld, the blower 112 and the evaporator 108 can be connected to the inside of the box body 1.
This makes it easy to assemble the parts. It is also possible to integrally mold the hinge 3 of the door 2 with resin, and in this case, the box l and the door 2 can be integrally molded.

Further, the box body 1 may be installed at an appropriate position in the vehicle interior, for example, at the lower part of the instrument panel 34 at the front of the vehicle interior of a wagon as shown in FIG. 8, or at the lower part of the seat 35.

Next, the operation of the refrigerator-freezer with the above configuration will be explained.

The refrigerant from the refrigerant pipe 18 first passes through the constant pressure expansion valve 106, and due to the throttling action of this valve 106, the refrigerant is reduced to 0.5 of the set pressure.
The evaporation temperature of the refrigerant when the pressure is reduced to below kg/- is -21℃.
Thus, the refrigerant performs an ice-making action in the freezing evaporator section 108a. The refrigerant that has passed through the freezing evaporator section 108a cools the blown air through the corrugated fins 8 in the refrigeration evaporator section 108b. This blown air, that is, cold air, circulates along the path of the refrigerator compartment 111 -> the grid 11 -> the cold air passage 27 - the blower fan casing 112a - the refrigeration evaporator part 108b - the refrigerator compartment 111. In addition, the grid 11 is connected to the refrigerator compartment 1.
11 (the right end in FIG. 4), cold air is spread throughout the refrigerator compartment 111. Therefore,
The canned drinking water 10 and the like in the refrigerator compartment 111 are cooled well by the forcedly circulated cold air. The cooling temperature in the refrigerator compartment 111 is controlled to a set temperature by intermittent operation of the blower 112 according to a detection signal from the temperature sensor 113. .

Note that the present invention is not limited to the above-mentioned embodiment, and can be modified in various ways.
It goes without saying that the arrangement form of the evaporator m108 and the like is not limited to that shown in the drawings, and can be implemented in various forms.

Furthermore, the freezing cycle for freezing and refrigeration and its control, for example, the freezing and refrigeration cycle may be configured independently from the cooling cycle.

As described above, according to the present invention, a good refrigeration effect can be exerted by forcibly circulating cold air to the refrigerator compartment using a blower through the cold air passage formed at the bottom of the refrigerator compartment, etc. By providing a refrigeration evaporator section in the refrigeration chamber formed by the refrigeration system, it is also possible to make ice, and a very significant practical effect can be obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a refrigeration cycle diagram, FIG. 2 is an explanatory diagram of operation, FIG. 3 is a perspective view of a refrigerator-freezer, and FIG. 4 is a diagram showing A-A in FIG. A cross-sectional view, 5th
The figure is a perspective view of the main part of Figure 3, Figure 6 is a perspective view of the evaporator, Figure 7 (a) is a top view of the blower fan casing, Figure 7 (bl is B-B of Figure 7 (al) The sectional view and FIG. 8 are schematic side views of the wagon.■...Box body, 2...Door, 27...Cold air passage, 1
08a... Refrigeration evaporator section, 108b... Refrigeration evaporator section, 110... Freezer compartment, 111... Refrigerator compartment, 1
12...Blower. Representative Patent Attorney Takashi Okabe

Claims (1)

[Claims] A box body having a door that can be opened and closed; a refrigerator compartment formed within the box body; a freezing compartment formed within the box body independently of the refrigerator compartment; and a refrigeration evaporator that cools the refrigerator compartment. a refrigeration evaporator section that cools the freezer compartment; a blower that is installed on the air intake side of the refrigeration evaporator section and forcibly circulates cold air to the refrigeration compartment through the refrigeration evaporator section;
A refrigerator-freezer for an automobile, comprising a cold air passageway formed below the refrigerator compartment, both evaporator sections, and the blower, and through which the cold air flows.