JP3537343B2 - refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator having two evaporators, one for refrigeration and the other for freezing.

[0002]

2. Description of the Related Art A refrigerating evaporator and a refrigerating evaporator of this kind are provided with two evaporators, and a refrigerant passage is alternately cooled in a refrigeration mode and a refrigerating mode by a switching valve and two capillary tubes. The refrigerant circuit of the refrigerator will be described with reference to FIG. 8 of the embodiment.

[0003] The refrigerant flowing out of the compressor 46 is supplied to a muffler 5.
8, through the heat radiating pipe 60, the condenser 62, the dew-proof pipe 64, and the dryer 66 to reach the three-way valve 68. In the three-way valve 68, the refrigerant flow path branches, one of which is directed to the chilling capillary tube 70 and the other is directed to the freezing capillary tube 72. From the refrigeration capillary tube 70 to the refrigeration evaporator 50, the refrigeration capillary tube 7
2 and the outlet side, and reaches the refrigeration evaporator 52. Thereafter, the flow returns to the compressor 46 through the accumulator 74 and the suction pipe 76.

In the refrigeration mode, the three-way valve 68 is switched to the capillary tube 70 for refrigeration, and in the refrigeration mode, the three-way valve 68 is switched to the capillary tube 72 for refrigeration to perform cooling. It has become.

[0005]

By the way, in the case of cooling alternately between the refrigeration side and the freezing side, during a short freezing side cooling as a cycle, especially when the medium is used at a low or medium room temperature or less, the heat exchange is small, so that the refrigerant is cooled. When the compressor 46 is stopped, the refrigerant flow noise (poco-pop noise) is generated near the refrigerant flow path of the accumulator 74.

That is, the liquid refrigerant in the refrigerating evaporator 52 flows out into the accumulator 74 when the compressor 46 is stopped,
The liquid level in the accumulator 74 rises. And
The end of the inlet pipe (discharge) of the accumulator 74 will be over, and the pipe will be located in the liquid.
Thereafter, since the bubble refrigerant flowing out of the pipe tip passes through the liquid refrigerant, a so-called popping sound is generated at that time, which is transmitted outside the refrigerator and becomes noise. Further, since the inside of the freezer compartment is small, the freezing evaporator 52 and the accumulator 7 are not provided.
4 has a structure different from that of the related art, and the occurrence is remarkable.

The above state will be described with reference to the drawings. FIG. 9 shows the inside of the accumulator 74.
Inside is a gas-liquid two-phase refrigerant (gas, liquid).
During the stop of the operation, the refrigerant of gas and liquid (the gas refrigerant 102 and the liquid refrigerant 100) is supplied from the refrigeration evaporator 52 and the like to the inlet pipe 10.
It flows out through 4. The liquid level of the liquid refrigerant 100 in the accumulator 74 is lower than the height of the distal end of the inlet pipe 104, and the bubble refrigerant gas 108 flows directly from the inlet pipe 104 to the gas refrigerant 102 side. No sound (poco-poco) is generated. That is,
The bubble boundary layer, which is the boundary between the gas refrigerant 102 and the liquid refrigerant 100, does not balance below the tip of the inlet pipe 104 and does not generate refrigerant flow noise. The inlet pipe 104
An oil return hole 106 is provided at the bottom of the accumulator 74 to prevent oil mixed in the refrigerant from accumulating in the accumulator 74.

When the cooling is alternately performed on the refrigeration side and the freezing side, the refrigerant is left over during the short cooling on the freezing side, particularly when the compressor is used at a low or medium room temperature or lower. As shown in FIG.
The liquid refrigerant 100 flows into the accumulator 74 and the liquid level of the accumulator 74 rises. Then, it goes over the tip of the inlet pipe 104 and the inlet pipe 10
4 is located in the liquid refrigerant 100. Thereafter, since the bubble refrigerant gas 108 flowing out of the inlet pipe 104 passes through the liquid refrigerant 100, a so-called popping sound is generated at that time, which is transmitted outside the refrigerator and becomes noise.

FIG. 11 is a diagram showing a positional relationship between a conventional refrigerating evaporator 52 and an accumulator 74. An accumulator 74 is provided above the refrigerating evaporator 52. In the case shown in FIG. 11, since the inlet and outlet of the refrigerant of the refrigeration evaporator 52 are at the upper part, the refrigeration evaporator 52 below the surplus refrigerant has a capacity (reservoir) as shown in FIG. There was no occurrence of refrigerant flow noise due to the rise of the liquid level.

The installation structure of the accumulator 74 and the refrigeration evaporator 52 this time is, as shown in FIG. 12, because the inside of the freezer compartment is narrow, the accumulator 74 is located on the side of the refrigeration evaporator 52. The inlet and outlet of the refrigerating evaporator 52 are provided below the refrigerating evaporator 52. With the arrangement shown in FIG. 12, it is difficult to store the excess refrigerant in the refrigeration evaporator 52 as shown in FIG.

FIG. 13 shows this state, in particular, the state of the refrigerant in the refrigeration evaporator 52 when the compressor 46 is stopped by refrigeration and cooling. Also in this case, similarly to the case shown in FIG. 10, there is a problem that the liquid level, which is the boundary layer between the liquid refrigerant 100 and the gas refrigerant 102 in the accumulator 74, rises to generate a refrigerant flowing sound (poco-popping sound). there were.

Accordingly, the present invention has been made in view of the above-mentioned problems, and has as its object to provide a refrigerator in which a refrigerant flow noise generated when the compressor is stopped is prevented.

[0013]

[0014]

[0015]

[0016]

The refrigerator according to the first aspect of the present invention comprises a compressor,
And evaporator for refrigeration for refrigeration temperature zone corresponding to refrigeration room
And a freezing evaporator for the freezing temperature zone corresponding to the freezing room,
An accumulator for retaining the refrigerant is connected in an annular
A medium flow path is formed, and a refrigerant flow path is switched to form a refrigeration evaporator.
Flow refrigerant through the refrigeration evaporator,
In a refrigerator with a switching valve through which the refrigerant flows
And a refrigeration evaporator is arranged downstream of the refrigeration evaporator,
An accumulator is placed downstream of the refrigeration evaporator and compressed.
When the machine is stopped, the switching valve is switched to the refrigerating evaporator and controlled.
And a refrigeration blower is disposed near the refrigeration evaporator, and the refrigeration blower is rotated while the compressor is stopped.

A refrigerator according to a second aspect of the present invention comprises: a compressor;
And evaporator for refrigeration for refrigeration temperature zone corresponding to refrigeration room
And a freezing evaporator for the freezing temperature zone corresponding to the freezing room,
An accumulator for retaining the refrigerant is connected in an annular
A medium flow path is formed, and a refrigerant flow path is switched to form a refrigeration evaporator.
Flow refrigerant through the refrigeration evaporator,
In a refrigerator with a switching valve through which the refrigerant flows
And a refrigeration evaporator is arranged downstream of the refrigeration evaporator,
An accumulator is placed downstream of the refrigeration evaporator and compressed.
When the machine is stopped, the switching valve is switched to the refrigerating evaporator and controlled.
And a refrigeration blower is provided near the refrigeration evaporator, and the refrigeration blower is rotated for a specific time while the compressor is stopped.

A refrigerator according to a third aspect of the present invention comprises: a compressor;
And evaporator for refrigeration for refrigeration temperature zone corresponding to refrigeration room
And a freezing evaporator for the freezing temperature zone corresponding to the freezing room,
An accumulator for retaining the refrigerant is connected in an annular
A medium flow path is formed, and a refrigerant flow path is switched to form a refrigeration evaporator.
Flow refrigerant through the refrigeration evaporator,
In a refrigerator with a switching valve through which the refrigerant flows
And a refrigeration evaporator is arranged downstream of the refrigeration evaporator,
An accumulator is placed downstream of the refrigeration evaporator and compressed.
When the machine is stopped, the switching valve is switched to the refrigerating evaporator and controlled.
Control means, and a refrigeration blower is disposed in the vicinity of the refrigeration evaporator, and the refrigeration blower is rotated when the compressor is stopped when the temperature is below a specific room temperature. .

[0020]

[0021]

[0022]

According to the refrigerator of the present invention, when the compressor is stopped, the switching valve is switched to the refrigeration evaporator side, so that the surplus liquid refrigerant during cooling is discharged to the refrigeration evaporator while the compressor is stopped. It is possible to temporarily store the liquid refrigerant, and it is possible to prevent a large amount of liquid refrigerant from flowing out into the accumulator. Thus, it is possible to prevent the generation of the refrigerant flow noise in the accumulator while the compressor is stopped.

Further, by rotating the refrigerating blower while the compressor is stopped, there is an effect of further evaporating surplus refrigerant, which has an effect of preventing generation of refrigerant flow noise.

Further, since a trap is provided at the outlet side of the refrigeration evaporator, a large amount of liquid refrigerant can be stored on the refrigeration evaporator side by this trap, so that a large amount of liquid refrigerant flows out to the accumulator side. Can be prevented, and generation of refrigerant flow noise can be prevented.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

First, the overall configuration of the refrigerator 10 of the present embodiment will be described with reference to FIGS.

FIG. 3 is a front view of the refrigerator 10 of this embodiment, and FIG. 4 is a front view of the refrigerator 10 with each door opened.

First, the refrigerator 10 will be described with reference to FIGS.
Will be described.

The cabinet 12 which is the main body of the refrigerator 10
Refrigerator room 14, vegetable room 16, temperature switching room 1
8, a freezer compartment 22 is provided. In addition, temperature switching room 1
An ice making room 20 is provided on the left side of 8. Further, a heat insulating partition 24 is arranged between the vegetable room 16, the temperature switching room 18, and the ice making room 20.

The refrigerator compartment 14 is provided with a refrigerator compartment door 14a which is opened and closed by a hinge. In addition, this refrigerator room 1
In the lower part of 4, a chilled chamber 26 for maintaining the temperature in the refrigerator at about 0 ° C. is provided.

The vegetable compartment 16 is provided with a drawer-type vegetable compartment door 16a, with which the vegetable container 28 can be pulled out. The vegetable container 28 is covered with a Chrispa cover 29.

The temperature switching chamber 18 is provided with a draw-out type temperature switching chamber door 18a.
Can be pulled out.

The freezer compartment 22 also has a drawer type freezer compartment door 22a.
Is provided, and the freezing container 32 can be pulled out together with the door.

As shown in FIG. 6, the ice making chamber 20 is provided with an ice making device 34 near the ceiling thereof, and an ice storage container 36 is provided below the ice making device 34.

The ice making device 34 includes an ice tray 38, a driving unit 40 for rotating the ice tray 38, and an ice detecting lever 42 for detecting the amount of ice in the ice storage container 36. The tank 44 that supplies water to the ice tray 38 is provided on the left side of the chilled chamber 26.

Next, the refrigerator 10 will be described with reference to FIGS.
The structure and arrangement of the refrigeration cycle will be described.

First, as shown in FIG.
It is provided in a machine room 48 provided at the bottom of the cabinet 12, that is, at the lower rear part of the freezing room 22.

The evaporator of the refrigerator 10 has two types, one for refrigeration and the other for freezing.
The refrigerator evaporator 50 is disposed behind the vegetable compartment 16, and the freezing evaporator 52 is provided at the rear upper portion of the freezing compartment 22. A refrigeration blower 54 is provided above the refrigeration evaporator 50, and a refrigeration blower 56 is provided above the refrigeration evaporator 52. In addition, the refrigeration evaporator 5
Below 0, a defrost heater 96 is provided. A defrost heater 98 is provided below the freezing evaporator 52.

Incidentally, the left side wall and the bottom plate of the temperature switching chamber 18 have a heat insulating structure. Thereby, the temperature switching chamber 1
Even if the inside temperature of the refrigerator 8 is set to the same temperature as that of the refrigerator compartment, there is no influence of the temperature from the freezer compartment 22 and the like existing around. Furthermore, since the back plate of the temperature switching chamber 18 also has a heat insulating structure, it is not affected by the temperature from the refrigerating evaporator 52.

FIG. 7 schematically shows the arrangement of the refrigeration cycle apparatus, and FIG. 8 is a block diagram showing the refrigerant flow path. Hereinafter, the flow of the refrigerant will be described with reference to FIGS. 7 and 8.

The refrigerant discharged from the compressor 46 is supplied to the muffler 5
8, through the heat radiating pipe 60, the condenser 62, the dew-proof pipe 64, and the dryer 66 to reach the three-way valve 68. In the three-way valve 68, the refrigerant flow path branches, one of which is directed to the chilling capillary tube 70 and the other is directed to the freezing capillary tube 72. From the refrigerating capillary tube 70 to the above-mentioned refrigerating evaporator 50, one is provided at the outlet side of the freezing capillary tube 72, and then to the above-mentioned refrigerating evaporator 52. Thereafter, the flow returns to the compressor 46 through the accumulator 74 and the suction pipe 76.

Here, the mounting position of each device not described above in the refrigerator 10 will be described.

As shown in FIG. 7, the condenser 62 is formed into a plate shape by bending a plurality of times, and is disposed below the bottom of the freezing compartment 22 as shown in FIG. The accumulator 74 is mounted on the right side of the freezing evaporator 52 as shown in FIG.

Next, the flow of cool air in the refrigeration cycle having the above-described configuration will be described with reference to FIGS.

First, the flow of the cool air cooled by the cooling evaporator 50 will be described.

The cool air cooled by the cooling evaporator 50 is sent from the front side of the cooling blower 54 to the cooling branch space 78 located behind the vegetable compartment 16. The upper portion of the refrigeration branch space 78 is connected to a refrigeration duct 80 provided on the back of the refrigeration compartment 14, and cool air is sent to the refrigeration duct 80. The refrigeration duct 80, as shown in FIG.
It is bifurcated at the lower part of the refrigerator compartment 14 and has a substantially U-shaped shape. Cooling air outlets 82 are provided at predetermined intervals on the front surface of the refrigeration duct 80, and cool air is blown into the refrigeration compartment 14 from these outlets 82. The cool air that has cooled the refrigerating compartment 14 passes below the chilled compartment 26 and the tank 44 (see FIG. 6), and flows into return ducts 84 provided on the left and right sides of the refrigerating blower 54 and the refrigerating evaporator 50 (see FIG. 5). ), And is blown below the refrigeration evaporator 50. Then, the cold air is cooled again by the refrigerating evaporator 50 and reaches the position of the refrigerating blower 54.

On the other hand, from the refrigerated branch space 78, the vegetable room 1
6 is blown out along the Chrispa cover 29, and the vegetable room 1
6 is cooled (see FIG. 6). This cold air is supplied to the vegetable container 28.
Flows from the front to the back, and the return opening 8
After that, the refrigerant is circulated to the refrigerator evaporator 50 (see FIG. 5).

Next, the flow of the cool air cooled by the freezing evaporator 52 will be described.

The cool air cooled by the freezing evaporator 52 reaches the freezing branch space 90 by the freezing blower 56.
The upper portion of the freezing branch space 90 communicates with the ice making device 34, and cool air is blown out from the upper portion to the ice making device 34. The lower part of the freezing branch space 90 communicates with a hole 33 opened in the back plate of the freezing container 32 of the freezing room 22 and the upper surface of the freezing container 32, and cool air flows from the lower part into the freezing container 32.
Blow out toward the inside.

The cool air that has cooled the ice making chamber 20 flows to the front of the freezing chamber 22, and the cool air that has cooled the inside of the freezing container 32 of the freezing chamber 22 flows to the front of the freezing chamber 22. Then, the cool air flows downward along the front surface of the freezing container 32 and reaches the return duct 92 through the bottom. The cool air flowing into the return duct 92 is circulated to the freezing evaporator 52.

As shown in FIGS. 5 and 6, on the right side of the freezing branch space 90, a damper device 94 for sending cool air to the temperature switching chamber 18 is provided. The amount of cool air sent to the switching room 18 is adjusted, and the temperature in the refrigerator is adjusted. The cool air that has cooled the temperature switching chamber 18 flows from the bottom of the temperature switching chamber 18 to the refrigeration evaporator 5.
It flows into the return duct 95 leading to 2 and circulates to the refrigeration evaporator 52.

The evaporator 50 for refrigeration, the evaporator 5 for freezing,
2 is a defrost heater 9 when the temperature falls below a predetermined temperature.
Defrosted by 6, 98.

FIG. 2 is a block diagram showing a main part related to the gist of the present invention. The whole control of the refrigerator is performed by a control device 110 comprising a microcomputer. Reference numeral 112 denotes a room temperature sensor, and a time accumulation timer 114 accumulates the operation time of the refrigerating blower 56.

FIG. 1 is a schematic diagram showing the arrangement of the refrigerating compartment and the freezing compartment. The refrigerating evaporator 50 is arranged on the upstream side and the refrigerating evaporator 52 is arranged on the downstream side. In the present invention, the surplus refrigerant is prevented from flowing into the accumulator 74 as much as possible.
Before stopping 6, the three-way valve 68 (see FIG. 8) is switched to the refrigeration side, and the refrigeration evaporator 50 is used as a capacity (reservoir). That is, by storing the refrigerant on the refrigeration evaporator 50 side on the upstream side, the amount of refrigerant flowing on the refrigeration evaporator 52 side is reduced, thereby preventing the surplus refrigerant from flowing into the accumulator 74. As a result, the gas-liquid boundary layer 116 in the accumulator 74 descends and is positioned below the distal end of the inlet pipe 104, so that it is possible to prevent the generation of the refrigerant flow noise (pop noise).

In the above description, the time during which the compressor 46 is stopped after the three-way valve 68 is switched to the refrigeration side is not particularly specified. However, after a specific time (for example, 5 minutes) has elapsed, the compressor 46 is stopped. May be stopped. This is because if the compressor 46 is stopped immediately, the refrigerant does not circulate in the cycle, and the refrigerant on the refrigeration evaporator 52 side does not decrease. That is, the control is such that the three-way valve 68 is switched from the freezing side to the refrigeration side, and the compressor 46 is stopped after a specific time has elapsed. Thus, by basically switching to the refrigerating side, the path of the refrigerant flow path becomes longer, and by adding the refrigerating evaporator 50 on the refrigerating side, the liquid refrigerant 100 can be stored.
4 can be prevented from rising.

The three-way valve 68 is switched by the compressor 4
6 during operation. As a result, the switching sound of the three-way valve 68 is canceled by the operation sound of the compressor 46, and exhibits an effect as a measure against noise.

In addition to the above control, as shown in FIG. 1, a trap 118 is provided at the outlet pipe of the refrigeration evaporator 50 in order to store more liquid refrigerant 100 on the refrigeration evaporator 50 side. You may do it. As a result, a rise in the liquid level in the accumulator 74 can be suppressed. In addition,
FIG. 1 shows the case where the trap 118 is formed, but the trap 118 may not be formed in the case of another control.

Further, while the compressor 46 is stopped, the refrigerating blower 56 in the refrigerating compartment 22 may be rotated at the same time. Thus, the liquid refrigerant 100 in the refrigerating evaporator 52
Is vaporized to reduce the excess refrigerant, and the accumulator 7
The rise of the liquid level in 4 can be suppressed, and the generation of refrigerant flow noise can be prevented.

The rotation control of the refrigerating blower 56 may be always performed, but the refrigerating blower 5
When the compressor 6 is rotated, the internal temperature of the compressor rises.
By performing the above operation at a specific room temperature for a specific time during the stoppage, the effect can be further improved. The room temperature is detected by the room temperature sensor 112 shown in FIG. 2, and when the room temperature is lower than, for example, 10 to 15 ° C., the refrigerating blower 56 is rotated. I try to make it.

It should be noted that these controls can be applied even during the defrosting operation.

Further, the above-described control may be performed alone or may be performed in combination with each other.

[0063]

As described above, according to the refrigerator of the present invention, when the compressor is stopped, the three-way valve is switched to the refrigeration evaporator side, so that the excess liquid refrigerant during cooling is refrigerated while the compressor is stopped. It is possible to temporarily store the evaporator as a capacity, and it is possible to prevent a large amount of liquid refrigerant from flowing into the accumulator. Thus, it is possible to prevent the generation of the refrigerant flow noise in the accumulator while the compressor is stopped.

Further, by rotating the refrigerating blower while the compressor is stopped, there is an effect of further evaporating surplus refrigerant, which has an effect of preventing generation of refrigerant flow noise.

Further, by providing a trap on the outlet side of the refrigeration evaporator, a large amount of liquid refrigerant can be stored on the refrigeration evaporator side by this trap, so that a large amount of liquid refrigerant flows out to the accumulator side. Can be prevented, and generation of refrigerant flow noise can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an arrangement configuration of a refrigerating evaporator and a freezing evaporator according to an embodiment of the present invention.

FIG. 2 is a control block diagram for performing a control operation of the present invention.

FIG. 3 is a front view of the refrigerator showing one embodiment of the present invention.

FIG. 4 is a front view of the cabinet with the door opened.

FIG. 5 is a longitudinal sectional view at the rear of a refrigerator cabinet.

FIG. 6 is a sectional view taken along line AA in FIG. 3;

FIG. 7 is a layout view of each device constituting the refrigeration cycle.

FIG. 8 is a block diagram showing a refrigerant flow path.

FIG. 9 is an explanatory diagram showing a relationship between a tip of an inlet pipe and a liquid refrigerant in an accumulator.

FIG. 10 is an explanatory diagram showing a state in which a refrigerant flow noise is generated due to a rise in the liquid level in the accumulator.

FIG. 11 is a conventional explanatory view in the case where an accumulator is arranged above an evaporator.

FIG. 12 is an explanatory diagram in a case where an evaporator and an accumulator are arranged sideways.

FIG. 13 is an explanatory view showing a state in which refrigerant flow noise is generated in a conventional accumulator.

[Explanation of symbols]

10 refrigerator 46 Compressor 50 Refrigeration evaporator 52 Refrigeration evaporator 68 Three-way valve 74 accumulator 100 liquid refrigerant 102 gas refrigerant 110 control device 118 trap

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazuaki Aino 1-6 Ota Toshiba-cho, Ibaraki-shi, Osaka Toshiba Abu E Co., Ltd. Osaka Office (56) References JP-A-3-95376 (JP, A) Japanese Utility Model 63-774 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F25D 11/02

Claims (3)

(57) [Claims] 1. A compressor, a condenser, a refrigerating evaporator for a refrigerating temperature zone corresponding to a refrigerating compartment, a refrigerating evaporator for a refrigerating temperature zone corresponding to a refrigerating compartment, and an accumulator for retaining refrigerant. Are connected in an annular fashion to form a refrigerant flow path. The refrigerant flow path is switched to allow the refrigerant to flow through the refrigeration evaporator and the refrigeration evaporator, or the switching valve for flowing the refrigerant only to the refrigeration evaporator is provided in the refrigerant flow path. In the refrigerator, a refrigerating evaporator is arranged downstream of the refrigerating evaporator, and an accumulator is arranged downstream of the refrigerating evaporator. When the compressor is stopped, the switching valve is set to the refrigerating evaporator side. And a control means for switching control of the refrigerator, wherein a refrigerating blower is arranged near the refrigerating evaporator, and the refrigerating blower is rotated while the compressor is stopped. 2. A compressor, a condenser, a refrigerating evaporator for a refrigerating temperature zone corresponding to a refrigerating compartment, a refrigerating evaporator for a refrigerating temperature zone corresponding to a refrigerating compartment, and an accumulator for retaining refrigerant. Are connected in an annular fashion to form a refrigerant flow path. The refrigerant flow path is switched to allow the refrigerant to flow through the refrigeration evaporator and the refrigeration evaporator, or the switching valve that allows the refrigerant to flow only to the refrigeration evaporator. In the refrigerator installed on the road, a refrigerating evaporator is arranged downstream of the refrigerating evaporator, an accumulator is arranged downstream of the refrigerating evaporator, and the switching valve is turned on when the compressor is stopped. Control means for switching control on the side, a refrigerating blower is arranged near the refrigerating evaporator, and the refrigerating blower is rotated for a specific time while the compressor is stopped. refrigerator. 3. A compressor, a condenser, a refrigeration evaporator for a refrigeration temperature zone corresponding to a refrigeration compartment, a refrigeration evaporator for a refrigeration temperature zone corresponding to a freezing compartment, and an accumulator for retaining refrigerant. Are connected in an annular fashion to form a refrigerant flow path. The refrigerant flow path is switched to allow the refrigerant to flow through the refrigeration evaporator and the refrigeration evaporator, or the switching valve that allows the refrigerant to flow only to the refrigeration evaporator. In the refrigerator installed on the road, a refrigerating evaporator is arranged downstream of the refrigerating evaporator, an accumulator is arranged downstream of the refrigerating evaporator, and the switching valve is turned on when the compressor is stopped. Control means for switching control on the side, a refrigerating blower is provided near the refrigerating evaporator, and when the compressor is stopped, the refrigerating blower is rotated when the temperature is below a specific room temperature. A refrigerator characterized by the following.