JPH0560445A - Automotive refrigerator - Google Patents

Abstract

PURPOSE:To obtain an automotive refrigerator which can shorten a necessary cold storage time at the time of a cold storage, i.e., a large heat quantity can be cooled in a short period. CONSTITUTION:A heat absorption plate 6 is separated from cold storage members 3, 4 and an evaporator 2 at the time of a cold storage. As a result, transfer of cold from the member 4 and the evaporator 2 to a cold storage chamber 1b due to the plate 6 is interrupted at the time of the cold storage, and a refrigerating capacity is concentrated at the cold storage. The plate 6 is brought into contact with the member 3 directly without the intermediary of an intermediate cover 5 or through the evaporator 2. As a result, the cold of the member 3 is transferred to the chamber 1b through the plate 6 at the time of cold insulation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle refrigerator for refrigerating foods, beverages and the like.

[0002]

2. Description of the Related Art Conventionally, as an on-vehicle refrigerator, Japanese Patent Application Laid-Open No. 60-179344 filed by the present applicant has been known. This device has a heat insulation box having a refrigerating chamber opened and closed by a lid, and a regenerator internally provided in the refrigerating chamber. The regenerator has a case at least a part of which serves as a heat absorbing plate, Evaporator and regenerator (eg water) enclosed in this case
Consists of.

Therefore, in this on-vehicle refrigerator, the cold storage agent is strongly cooled by the evaporator during cold storage, and at the time of cold storage, the cold storage agent absorbs heat from the refrigerating chamber through the case as a heat absorbing plate.

[0004]

The on-vehicle refrigerator having such a cold storage agent is excellent in that the operation of the refrigerating device is stopped while the cold storage agent can be kept cold, and the power supply from the on-vehicle battery can be cut off. Have advantages. However, in such a cold storage type on-vehicle refrigerator, the refrigeration of the contents and the cold storage of the cold storage agent must be carried out simultaneously in parallel by a single refrigerating device, and the cold storage load of the cold storage agent is increased due to an increase in the cooling heat load. There is a drawback that it takes a long time, and in some cases, the cold storage must be performed before the cold storage is completed, which causes a problem that the amount of cold storage heat is reduced.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle-mounted refrigerator capable of shortening the required cool storage time, that is, storing a large amount of heat in a short time.

[0006]

An on-vehicle refrigerator according to the present invention is provided with an evaporator of a refrigerating apparatus and a heat insulation box having a refrigerating chamber opened and closed by a lid, and in contact with the evaporator. A heat storage member, and a heat-absorbing plate having good heat conductivity and a heat-insulating inner lid that are movably disposed in the refrigerating chamber, and the heat-absorbing plate is provided by the inner lid from the cool storage member and the evaporator. The position can be changed between the separated cold storage position and the cold storage position in which the cold heat of the cold storage member is transferred to the cold storage chamber by contacting the cold storage member directly or via the evaporator without passing through the inner lid. It is characterized in that it is arranged in.

In a preferred embodiment, the heat absorbing plate is biased by the lid portion at the cold storage position during cold storage to push the cold storage member toward the evaporator through the inner lid, and when the cold storage is performed, In the cold storage position, the cold heat of the cold storage member is transferred to the refrigerating chamber in close contact with at least one of the cold storage member and the evaporator without passing through the inner lid.

[0008]

When the cold storage is performed, the heat absorption plate is arranged at a cold storage position where it is separated from the cold storage member and the evaporator by the inner lid. As a result, during cold storage, the transfer of cold heat from the cold storage member and the evaporator by the heat absorbing plate to the refrigerating chamber is almost shut off, and most of the refrigerating capacity of the refrigerator is concentrated only in cold storage.

On the other hand, at the time of keeping cold, the heat absorbing plate comes into contact with the cold storage member directly or via the evaporator without using the inner lid. As a result, when the refrigerator is stopped while the food is cold, the cold heat of the cold storage member is transferred to the refrigerating compartment through the heat absorbing plate to cool the refrigerating compartment.

[0010]

As described above, in the on-vehicle refrigerator of the present invention, the large-area heat absorbing plate can be separated from the cold storage member and the evaporator during cold storage, so that the cold storage time of the cold storage agent is reduced by reducing the cooling heat load. Therefore, it is possible to achieve the excellent effect of being able to reduce the problem, and to solve the problem that the amount of cold storage heat is reduced due to insufficient cold storage of the cold storage member.

Further, since the cool storage agent has a large cold-retaining capacity, the operation of the refrigerating apparatus may be stopped while the food is kept cold.
During that time, the power supply from the on-vehicle battery is unnecessary, and the problem that the engine start becomes difficult due to the discharge of the on-vehicle battery is prevented.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the on-vehicle refrigerator of the present invention will be described below. FIG. 1 shows a sectional view of a vehicle-mounted refrigerator during cold storage. This on-vehicle refrigerator includes a heat-insulating box 1 having an upper end opening having a lid portion 1a and a refrigerating compartment 1b, an evaporator 2 arranged at the bottom of the refrigerating compartment 1b, and a cool storage arranged in contact with the evaporator 2. The members 3 and 4, the inner lid 5 placed on the cool storage member 4, and the heat absorbing plate 6 placed on the inner lid 5 are provided, and the evaporator 2 is connected to the pipe 14 of the refrigeration apparatus. ..

In this refrigeration system, a compressor 9, which is driven by a vehicle engine, a condenser 10, a capillary tube 12, an evaporator 2, an accumulator 8 and a compressor 9 are connected by a pipe 14 to form a closed cycle. A check valve 7 is connected between the evaporator 2 and the accumulator 8, and the condenser 10 and the capillary tube 1 are connected to each other.
An electromagnetic two-way valve is arranged between the two. Cooling fan 1
Reference numeral 3 is a fan for cooling the condenser 10.

The lid portion 1a and the heat insulating box 1 are formed by covering the inner and outer surfaces of an inner member made of rigid polyurethane foam with a plastic molding plate material, and after a part of the lid portion 1a is fitted into the upper end of the heat insulating box 1. The lid portion 1a is fixed to the heat insulating box 1 by an external buckle. Inside the heat insulation box 1, there is a rectangular parallelepiped refrigerating chamber 1b, and a cool storage member 3 is sandwiched between the bottom surface of the refrigerating chamber 1b and the evaporator 2 above the refrigerating chamber 1b. The member 4 is placed. These cool storage members 3 and 4 are made of a flat plastic airtight bag and water containing ethylene glycol sealed therein.

The inner lid 5 is about 25 cm in length and width and about 3 c in thickness.
m is a rectangular plate made of rigid polyurethane foam, and the vertical and horizontal dimensions thereof substantially match the horizontal dimensions of the refrigerator compartment 1b. Therefore, as can be seen from FIG. 1, in the refrigerating chamber 1b, the inner lid 5 is placed on the upper regenerator member 4 and the refrigerating chamber 1b is divided into upper and lower parts, and the lower space thereof is provided with the evaporator 2 and the regenerator member. It is a small volume cold storage space with 3 or 4 built-in.

The heat absorbing plate 6 is a bowl-shaped container formed by deep drawing of aluminum, and is placed on the inner lid 5. Heat absorbing plate 6
The upper end portion of the heat absorbing plate 6 is urged downward by the lid portion 1a, so that the bottom portion of the heat absorbing plate 6 moves the cool storage member 4 through the inner lid 5 to the evaporator 2
(To be precise, it is pressed against the cooling fin integrated with the evaporator). Although the description of the operation of the refrigeration system itself is well known, it will be omitted. However, the refrigerant dissipated in the condenser 10 by driving the compressor 9 by the vehicle engine (not shown) undergoes adiabatic expansion in the capillary tube 12, and then the evaporator. Endotherm at 2. The evaporator 2 having a low temperature cools the cool storage members 3 and 4 to store cold. However, during this cold storage period, the food to be kept cold is not stored in the heat absorbing plate 6 which also serves as a food container. Such a situation occurs, for example, on the way out for fishing.

In this way, the heat absorbing plate 6 and the refrigerating chamber 1
Since most of b is insulated from the cool storage member 4 by the inner lid 5, the heat load of the evaporator 2 is reduced, and the cool storage member 3,
4 is rapidly cooled. Next, with reference to FIG. 2, a description will be given of the time when the apparatus is kept cold. The heat absorbing plate 6 is directly placed on the evaporator 2, the food 21 is contained in the heat absorbing plate 6 as a food container, and the cold storage member 4 is placed on the food 21.

Further, the inner lid 5 is provided with the upper end of the heat absorbing plate 6 and the lid portion 1a.
It is inserted between the lid 1a and the inner lid 5
The heat absorbing plate 6 is pressed against the evaporator 2 via the to reduce the thermal resistance between them. In this way, the food is cooled from the evaporator 2 and the cool storage member 3 through the heat absorbing plate 6 and is directly cooled from the cool storage member 4, and is quickly and efficiently kept cool.

Even when the operation of the compressor 9 is stopped, the cold storage members 3, 4 can keep the food 21 cool. If the electromagnetic two-way valve 11 is shut off in the case of keeping cold by the cold storage member, the evaporator 2 and the capillary tube 12 are shut off from the condenser 10 side in cooperation with the check valve 7, and the evaporator 10 is shut off. It is possible to prevent the high temperature refrigerant gas from flowing into the second side and prevent heat loss due to the inflow.

In the above embodiment, the endothermic plate 6 is a food container, but it goes without saying that a food container other than the endothermic plate 6 may be provided separately. The heat insulating box 1 may be a side opening instead of the upper end opening, and a door may be provided to open and close this opening. Next, the control device 30 for controlling the automatic operation of the in-vehicle refrigerator will be described with reference to the block diagram of FIG. 3 and the flowchart of FIG.

The control device 30 has an ECU (electric control unit) 31, and a power input terminal of the ECU 31 is connected to a vehicle battery 36 through a power switch 32 and a key switch 37. Reference numeral 33 is a variable resistor for setting the temperature, which is arranged in the vehicle compartment. Three
Reference numeral 4 denotes a thermistor for detecting the temperature of the outlet side of the evaporator 2, which detects the temperature of the evaporator 2. Reference numeral 35 is a limit switch for instructing the cold storage operation, and is arranged at the bottom of the refrigerating chamber 1b in the vicinity of the evaporator 2 as shown in FIGS.

The limit switch 35 is pressed by the lower surface of the inner lid 5 during the cold storage shown in FIG.
During the cold storage shown in (3), it is not operated because it is not pressed by the lower surface of the inner lid 5. That is, the limit switch 35
By detecting that the inner lid 5 is interposed between the heat absorbing plate 6 and the cool storage member 4, the cool storage mode is automatically detected. The ECU 31 controls the operations of the condenser fan motor 13, the compressor 9, and the solenoid valve 11.

The operation of the control device 30 will be described with reference to the flowchart of FIG. When the power switch 32 is connected, the operation is started and the solenoid valve 11 is operated (10
2). Next, check the state of the limit switch 35 (10
4) If the inner lid 5 is turned on by the limit switch 35 (see FIG. 5), the cool storage mode is set to −18 ° C. as the cold storage mode (106), and if it is off (see FIG. 6) As a mode, the set temperature for cold storage is set to a value Tvol set by the variable resistor 33 (108).

Next, the state of the power switch 32 is confirmed (110), and if it is off, the solenoid valve 11, the compressor 9, and the condenser fan motor 13 are shut off (11).
2), if the routine is finished and it remains on,
It is checked whether the temperature Ts of the evaporator 2 detected by the mister 34 is below the set temperature (114). If not, the compressor 9 and the condenser fan motor 13 are started (116), and the routine returns to step 104. To do. If the following is true, the compressor 9 and the condenser fan motor 1
3 is turned off (118), the state of the power switch 32 is checked again (120), and if it is off, the process proceeds to step 112. If it is on, the temperature Ts of the evaporator 2 is the set temperature T.
Check whether it has risen above set + 5 degrees (122),
If it has not risen, it returns to step 120, and if it has risen, it returns to step 104 and restarts the operation of the refrigeration system.

Further, as described above, when the power is off, in order to reduce the heating of the evaporator 2 due to the movement of the refrigerant gas, the flow of the refrigerant gas is blocked by the solenoid valve 11 upstream of the evaporator 2 and the check valve 7 downstream thereof. To be done. The capillary tube 1
It goes without saying that an expansion valve can be used instead of 2, and the check valve 7 can be replaced with a solenoid valve. (Modification) A modification will be described with reference to FIGS. 7, 8 and 9.

In this embodiment, the heat absorbing plate 6 also serving as a food container
It is characterized in that the inner lid 50 is adhered to one outer side surface of No. 0 and the posture of the heat absorbing plate 60 is changed during cold storage and cold storage. That is, during cold storage, as shown in FIG.
Accommodates the heat absorbing plate 60 in a posture in which the heat absorbing member 4 contacts the cold accumulating member 4, and the heat absorbing plate 60 is accommodated in a posture rotated by 90 degrees so that the inner lid 50 does not contact the cool accumulating member 4 during cold storage. By doing so, the handling operation of the members during cold storage and cold storage can be simplified.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment (during cold storage) of a vehicle-mounted refrigerator of the present invention,

FIG. 2 is a cross-sectional view showing a cold state of the vehicle-mounted refrigerator shown in FIG.

FIG. 3 is a block circuit diagram of a control device,

FIG. 4 is a flowchart of a control device,

5 is a partially enlarged cross-sectional view showing a cold storage state of the vehicle-mounted refrigerator of FIG. 1,

FIG. 6 is a partially enlarged cross-sectional view showing a cold state of the vehicle-mounted refrigerator of FIG. 1,

FIG. 7 is a perspective view showing a modification of the heat absorbing plate and the inner lid,

FIG. 8 is a cross-sectional view showing the heat-absorbing plate and the inner lid of FIG.

9 is a cross-sectional view showing a state where the heat absorbing plate and the inner lid of FIG. 7 are housed during cold storage;

[Explanation of symbols]

 1 Insulation Box 1a Lid 2 Evaporator 3, 4 Regenerator 5 Middle Lid 6 Endothermic Plate

Claims (2)

[Claims] 1. A heat insulation box having a refrigerating chamber in which an evaporator of a refrigerating apparatus is arranged and which is opened and closed by a lid, a regenerator member arranged in contact with the evaporator, and movable in the refrigerating chamber. A heat-absorbing plate having good heat conductivity and a heat-insulating inner lid are provided, and the heat-absorbing plate includes a cool storage position separated from the cool storage member and the evaporator by the inner cover, and the middle cover. In-vehicle mounting, characterized in that the position is changeable between a cold storage position where the cold heat of the cold storage member is transferred to the cold storage chamber directly without contact with the cold storage member or through the evaporator and is transferred to the cold storage chamber. refrigerator. 2. The heat absorbing plate is biased by the lid at the cold storage position during cold storage to press the cold storage member against the evaporator through the inner lid, and is kept at the cold storage position during cold storage. The on-vehicle refrigerator according to claim 1, wherein the cold heat of the cool storage member is transferred to the refrigerating chamber in close contact with at least one of the cool storage member and the evaporator without passing through the inner lid.