CN1888757A - refrigerator - Google Patents

Abstract

The invention relates to a refrigerator in which cold air is refrigerated by natural convection in the freezer by natural convection and refrigerated in the refrigerator by selective natural convection or forced convection, especially a kind of air that circulates in the refrigerator. A refrigerator that ensures uniform temperature and flow at any position when the cold air flows out along the outflow channel by sufficient heat exchange with the evaporator of the refrigerator compartment when passing through the intake channel. Because the refrigerator of the present invention can maintain the uniformity of the temperature in the box, its cooling performance can be ensured.

Description

refrigerator

technical field

The invention relates to a refrigerator in which cold air is refrigerated by natural convection in the freezer and refrigerated by selective natural convection or forced convection in the freezer, especially a kind of air that circulates in the freezer. A refrigerator that ensures uniform temperature and flow at any position when cold air flows out along the outflow channel by sufficient heat exchange with the evaporator of the refrigerator compartment when passing through the heat exchange channel.

Background technique

Generally speaking, refrigerators can be divided into direct cooling and indirect cooling according to the cooling method. Among them, the refrigerator of the direct cooling method installs an evaporator on the inner wall of the freezing room and the refrigerating room, and uses the natural convection of the cold air generated around the evaporator to cool the freezing room and the refrigerating room; An evaporator is installed, and a fan is installed above the cold air circulation channel, and the freezing chamber and the refrigerating chamber are refrigerated by the forced air supply of the cold air generated around the evaporator by the fan.

Fig. 1 is a side sectional view of a prior art refrigerator.

The refrigerator shown in Fig. 1 adopts the indirect refrigeration method, and as shown in Fig. 1, the refrigerator main body 2a, 2b that forms freezer F and refrigerator R at the upper and lower sides respectively is installed the freezer door 4a that can open and close and the refrigerator compartment. door 4b, and while the evaporator 10 is installed in the space on the inner wall of the above-mentioned freezer compartment F, the refrigeration cycle connected thereto is installed on one side of the above-mentioned refrigerator main body 2a, 2b. Sent to the blower fan 12 and the motor 14 of the freezing compartment F and the refrigerating compartment R.

At this time, a heat insulating material (not shown) is installed between the outer shell 2a and the inner shell 2b of the above-mentioned refrigerator main body 2a, 2b, and the mechanical room at the bottom of the above-mentioned refrigerator main body 2a, 2b is installed through the refrigerant pipeline and the above-mentioned evaporator. 10 connected compressor 6, condenser 8 and capillary tube (not shown), in addition, the above-mentioned evaporator 10 is installed inside the inner shell 2b of the above-mentioned freezing chamber, and below the above-mentioned condenser 8, the installation guide condenses on the above-mentioned A drain pipe (not shown) for condensed water on the surface of the evaporator 10 and a drain pan (not shown) for accumulating condensed water.

Certainly, in order to make the cold air exchanged by the above-mentioned evaporator 10 circulate in both the above-mentioned freezing compartment F and the refrigerating compartment R, a cold air circulation channel is formed inside the inner shell 2b of the above-mentioned refrigerating compartment, and on the inner shell 2b of the above-mentioned refrigerating compartment A plurality of cold air distribution holes are formed.

In addition, components such as the compressor 6 and the motor 14 are connected to a control unit (not shown) and adjusted by the control unit. Specifically, when the above-mentioned control unit starts the above-mentioned compressor 6 and the motor 14, as the above-mentioned compressor 6 is started, the refrigerant circulates along the above-mentioned compressor 6, the condenser 8, the capillary tube, and the evaporator 10 and communicates with the above-mentioned While the air around the evaporator 10 performs heat exchange to generate cold air, the air blower 12 sends the cold air to the freezing chamber F and the refrigerating chamber R to realize freezing and refrigeration.

However, the existing refrigerator adopts the indirect refrigeration method that realizes refrigeration through forced convection of the cold air. Since the cold air passing through the evaporator 10 flows along the complicated cold air circulation channel, it is discharged in the refrigerator room R, and the area closer to the freezer room F The refrigerating room R can maintain a lower temperature, while the refrigerating room R farther from the freezing room F maintains a higher temperature, so that the temperature of the refrigerating room R is often uneven.

Of course, in order to solve these problems, it is possible to use a refrigerator with a direct cooling method in which cold air is naturally blown, but there is also a problem that because the internal volume of the refrigerator is generally larger than that of the freezer, the cold air cannot be circulated smoothly, and it cannot be applied to large-capacity refrigerators. Problem with refrigerator.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a refrigerator that can make the air fully perform heat exchange even when the direct refrigeration refrigerator realizes the indirect refrigeration mode by adding accessories, so that the cold air can be kept uniform in any position of the refrigerator temperature.

In order to solve the above-mentioned problems, the refrigerator of the present invention comprises the following parts: a refrigerator main body respectively forming a freezer compartment and a freezer compartment; a freezer evaporator installed in the freezer compartment and directly cooling the freezer compartment; A refrigerating room evaporator for refrigerating the refrigerating room; it includes a compressor, a condenser, and an expansion component connected to the evaporator of the refrigerating room and the evaporator of the refrigerating room, and generates refrigeration around the evaporator through the circulation of the refrigerant Circulation; installed on the wall of the refrigerating room in direct contact with the above-mentioned refrigerating room evaporator, and forming a suction channel at one end in order to form a cold air circulation channel in the vertical direction, and at the same time forming a side of the above-mentioned suction channel in order to distribute and supply cold air to the refrigerating room A plurality of cold air distribution pipes; installed at the suction passage of the above-mentioned pipes, and the air supply device that makes the air circulated in the refrigerating room pass through the above-mentioned cold air circulation passage; it is formed and arranged on the inside of the above-mentioned pipes, and is sucked by the above-mentioned air supply device All the air passes through the refrigerating room wall in direct contact with the refrigerating room side evaporator to generate cold air for heat exchange and the channel partitioning device for the discharge channel that guides the cold air to the cold air distribution holes.

The refrigerator of the present invention adopting the above-mentioned structure has the following advantages: because the cold air is naturally convected in the freezer compartment and is forced to blow air in the freezer compartment at the same time, it can evenly cool and refrigerate even when the volume of the freezer compartment is larger than that of the freezer compartment. room; even if the cold air passing through all the heat exchangers in the refrigerating room moves from the bottom to the top due to the channel resistance reducing the flow rate, the cold air at a uniform temperature can be discharged at a uniform flow rate at each position through the gradually larger cold air distribution holes, improving Refrigeration performance of the refrigerator.

Description of drawings

Fig. 1 is a side sectional view of a refrigerator of the prior art;

Fig. 2 is a side sectional view of the refrigerator of the present invention;

Fig. 3 is a plane sectional view of the refrigerator of the present invention;

Fig. 4 is a front view of the main body of the refrigerator of the present invention.

Explanation of reference signs of main components

52: Refrigerator body 54a: Freezer door

54b: Refrigerator door 56: Compressor

58: Condenser 60a: Freezer evaporator

60b: Refrigerator evaporator 62: Thermal insulation material

64: Control Department 70: Pipeline

70h: Air-conditioning distribution hole 72: Pipe insulation material

74a, 74b: Passage next door 80: Air supply device

82: Fan 84: Motor

86: Fan frame

Detailed ways

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

2 is a side sectional view and a plan sectional view of the refrigerator of the present invention, and FIG. 4 is a front view of the main body of the refrigerator of the present invention.

As shown in Figures 2 to 4, using the refrigerator of the present invention, a freezer compartment F is formed below the interior of the refrigerator main body 52 with the front open and a refrigerator compartment R is formed above; the freezer compartment door 54a and the refrigerator compartment door 54b are connected by door hinges To the front of the above-mentioned refrigerator main body 52; a refrigeration cycle including evaporators 60a, 60b is installed in the inner wall of the above-mentioned refrigerator main body 52. The above-mentioned refrigerator performs cooling in the above-mentioned freezer compartment F by direct cooling through natural convection of cold air, and at the same time, in the above-mentioned refrigerator R, performs cooling in an indirect cooling mode by forced air supply of cold air, and in the above-mentioned refrigerator R, The cold air passing through all the above-mentioned refrigerating room evaporators 60b flows and sprays from bottom to top.

Here, between the outer shell 52a and the inner shells 52b and 52c that constitute the appearance of the refrigerator main body 52, a heat insulating material 62 is formed by foaming in a state where various components are housed therein, and a freezer compartment is formed inside the inner shells 52b and 52c. F and the refrigerating room R, and in order to form the cold air circulation passages A and B, the cold air circulation groove 52h in the vertical direction is formed in the above-mentioned refrigerating room shell 52c.

Next, the above-mentioned evaporators 60a and 60b are composed of two overlapping metal plates forming a refrigerant pipe groove, and are divided into a freezer compartment evaporator 60a installed in the freezer compartment F and a refrigerator compartment evaporator 60b installed in the refrigerator compartment R. In addition, the freezing compartment evaporator 60a and the refrigerating compartment evaporator 60b are connected to each other so that the refrigerant flows into each other.

In particular, the above-mentioned freezer evaporator 60a is installed in the shelf 55a inside the above-mentioned freezer F where food can be directly placed and the storage space is divided, and the freezer F can be directly refrigerated, while the above-mentioned freezer evaporator 60b is close to the inner wall Installed in the inner shell 52c of the above-mentioned refrigerating room, and should be close to a part of the center of the inner wall of the cold air circulation tank 52h in the above-mentioned refrigerating room, so the width of the evaporator 60b in the refrigerating room should be wider than the width of the cold air circulation tank 52h. narrow.

Of course, the evaporators 60a, 60b should be connected with expansion components (not shown) such as the compressor 56, the condenser 58, capillary tubes or electronic expansion valves, so that the refrigerant circulates to form a refrigeration cycle.

At this time, temperature sensors (not shown) are installed on one side of the above-mentioned evaporators 60a, 60b, and each temperature sensor is connected to the control unit 64 that regulates the operation of various components. The temperature signal input by the sensor controls the operation of the above-mentioned compressor 56 .

Next, in order to form the cold air circulation channels A and B, the duct 70 is installed in the cold air circulation tank 52h, and the air blower 80 is connected to the control unit 64, and a duct is installed between the duct 70 and the cold air circulation tank 52h. The partition walls 74a, 74b divide the cold air circulation passage A, B into a heat exchange passage A and an outflow passage B.

Of course, even if the above-mentioned duct 70 is installed in the cold air circulation tank 52h, it will not interfere with the food storage shelf 55b.

Here, the duct 70 is in the shape of a metal plate, and a suction passage is formed at the upper end, and a plurality of refrigerant distribution holes 70h are formed at both ends of the suction passage at a certain distance, and both ends are sandwiched between the cold air circulation. slot 52h. In the state where the duct 70 is installed in the cold air circulation tank 52h, the front of the duct 70 is made to be on the same plane as the refrigerating chamber casing 52c, so that the reduction in the internal volume of the refrigerator can be prevented compared with the conventional direct cooling type refrigerator. .

At this time, since the channel partition walls 74a, 74b are integrally formed on the back of the duct 70 from top to bottom, if the duct 70 is installed on the cold air circulation tank 52h, the side of the suction channel will be covered by the channel partition walls 74a, 74b up and down. The above-mentioned heat exchange channel A is formed in the longitudinal direction. At the same time, the above-mentioned outflow channel B is formed on the back side of the above-mentioned suction channel in the vertical direction, and the above-mentioned exchange channel A and outflow channel B should divide their upper ends and connect their lower ends.

Therefore, after the air inhaled from the above-mentioned suction passage passes through the above-mentioned heat exchange passage A to complete sufficient heat exchange, even if the cold air flows along the above-mentioned outflow passage B and produces passage resistance, it can be discharged from the above-mentioned cold air distribution hole 70h at a uniform flow rate. Wind, it is advisable that the above-mentioned cold air distribution hole 70h should gradually become larger from the bottom of the above-mentioned pipe 70 to the top.

Moreover, it is advisable to attach a certain thickness of heat insulating material 72 to the back of the above-mentioned pipe 70, and only attach a certain thickness of heat insulating material 72 to the corresponding section of the above-mentioned heat exchange channel A that is closely combined with the above-mentioned refrigerating room evaporator. Because the heat insulating material 72 is attached to the back of the pipe 70, even if frost or condensed water forms on the surface of the cold air circulation tank 52h where the refrigerating room evaporator 60b is installed, it can be covered by the pipe 70, and the heat insulation effect can be utilized. Frosting or condensed water can be prevented from forming on the outside of the pipe 70 connected to the above-mentioned refrigerating room R, so as to realize a more hygienic cooling environment.

In addition, a drain pipe (not shown) that allows water to be discharged to the outside even when the frost on the surface of the cold air circulation tank 52h melts is connected to the lower end of the duct 70. At the same time, at the end of the drain pipe, A drain pan (not shown) for accumulated condensed water is installed, and the drain pan should be able to be drawn out to the outside.

Secondly, the air blower 80 is composed of a blower fan 82 that sends the cold air circulating in the refrigerating room R to the heat exchange channel A, a motor 84 that drives the fan, and a fan frame that houses the blower fan 82 and the motor 84. The fan frame 86 is attached to the suction passage, and the motor 84 is connected to the control unit 64 .

At this time, it is advisable for the above-mentioned blower fan 82 to use an axial flow fan that sends cold air to the direction of the shaft, and the objects are arranged at a certain distance in front of the above-mentioned fan frame 86, thereby reducing the resistance of the air inlet passage, and the distance should be determined by the above-mentioned blower fan. The diameter of 82 is suitable.

Subsequently, the above-mentioned control unit 64 controls the operation of other components including the above-mentioned compressor 56 and the motor 84. , the control unit will control each component to reach the set freezing set temperature range and refrigerating set temperature range.

At this time, when the temperature of the refrigerating room R is higher than the maximum temperature TrM in the refrigerating set temperature range, the control unit 64 rotates the blowing fan 82 at a predetermined first rotation speed while starting the 56 compressor 56. , and to control the refrigeration work.

However, when the temperature of the refrigerating room R is lower than the lowest temperature Trm of the refrigerating set temperature range, the control unit 64 stops the operation of the compressor 56 and allows the higher-temperature refrigerant to pass through the refrigerating room evaporator 60b. The defrosting operation of the surface of the refrigerating room evaporator 60b is controlled by rotating the blower fan 82 at a second rotation speed faster than the predetermined first rotation speed.

The operation of the present invention constituted as described above is as follows.

First, the control unit 64 inputs the set freezing temperature Tf0 and the set refrigerating temperature Tr0, and if it is determined to be higher than the freezing compartment temperature Tf and refrigerating compartment temperature Tr, the compressor 56 and the motor 84 are activated.

At this time, as the above-mentioned compressor 56 starts, the refrigerant will circulate along the above-mentioned compressor 56, condenser 58, expansion parts, and evaporators 60a, 60b, and the low-temperature and low-pressure refrigerant and surrounding air evaporate in the above-mentioned freezing chamber. The evaporator 60a and the refrigerating room evaporator 60b become cool air through heat exchange.

Then, in the above-mentioned freezer compartment F, the cold air is refrigerated by natural convection, and in the above-mentioned refrigerator compartment R, with the activation of the above-mentioned motor 84, the above-mentioned blower fan 82 is rotated to make the air circulating in the above-mentioned refrigerator compartment R flow from above along the above-mentioned heat exchange passage A. The cold air moves downward and generates cold air, and the cold air moves from bottom to top along the outflow channels B on both sides through the cold air distribution groove 70h and is exhausted into the refrigerating room R, thereby realizing refrigeration.

At this time, due to the sufficient heat exchange effect between the above-mentioned heat exchange channel A and the heat exchanger 60b on the side of the evaporator, the cold air can not only maintain a uniform temperature, but even if channel resistance occurs when flowing along the above-mentioned outflow channel B, it will not Since the cold air distribution hole 70h gradually becomes larger from the bottom to the top, the air can be exhausted with a uniform flow rate.

Certainly, because a part of the section in the center of the pipe corresponding to the above-mentioned heat exchange passage A maintains a lower temperature than the sections on both sides of the pipe 70 corresponding to the above-mentioned outflow passage, the moisture in the air inside the refrigerating room R may condense on the above-mentioned In a part of the center of the pipe 70, condensation on the surface of the pipe 70 can be prevented by the thermal insulation effect of the heat insulating material 72 installed inside.

Like this, along with the start-up of above-mentioned compressor 56 and motor 84, the cold air in above-mentioned freezer compartment F is refrigerated by natural convection, and in order to be refrigerated by the forced convection of cold air in above-mentioned refrigerated compartment R, will carry out the above-mentioned process repeatedly until freezer compartment The temperature Tf and the refrigerating compartment temperature Tr reach the respective set freezing temperature Tf0 and set refrigerating temperature Tr0.

Above, the present invention has been described in detail with reference to the embodiments of the present invention and the drawings, but the scope of the present invention is not limited to the above embodiments and drawings.

Claims (6)

1. A refrigerator, characterized in that: comprising: Refrigerator main bodies respectively forming the freezer compartment and the refrigerator compartment; A freezer evaporator installed in the above freezer and directly cooling the freezer; A refrigerating room evaporator installed on the wall of the refrigerating room to cool the refrigerating room; A refrigeration cycle that includes a compressor, a condenser, and an expansion component connected to the evaporator in the freezing chamber and the evaporator in the refrigerating chamber, and generates refrigeration around the evaporator through the circulation of the refrigerant; The pipe installed on the inner wall of the refrigerator in direct contact with the evaporator of the refrigerator, in order to form a cold air circulation channel in the vertical direction, forms a suction channel at one end of the pipe, and at the same time, in order to distribute and supply the cold air to the refrigerator. Multiple cold air distribution holes are formed on one side of the channel; An air supply device that is installed at the suction channel of the above-mentioned pipeline and allows the air that has been circulated in the refrigerating room to pass through the above-mentioned cold air circulation channel; A passage for heat exchange that generates cold air and guides the cold air to the above-mentioned cold air distribution hole is formed and installed inside the above-mentioned duct. The channel partitioning device of the discharge channel. 2. The refrigerator according to claim 1, characterized in that the pipe is installed on a section of the inner wall of the refrigerator which is in direct contact with the evaporator of the refrigerator and forms a larger cold air circulation groove. 3. The refrigerator according to claim 2, wherein the pipe is installed in the cold air circulation tank and forms the same plane as the inner wall of the refrigerator. 4. The refrigerator according to claim 3, wherein the suction channel is formed at the center of the upper end of the duct, and a plurality of cold air distribution holes are formed at both ends at a certain distance in the vertical direction. 5. The refrigerator according to claim 4, characterized in that the cold air distribution hole gradually becomes larger from bottom to top at the lower end of the pipe. 6. The refrigerator according to any one of claims 2 to 5, characterized in that: while the passage dividing member forms the heat exchange passage and the outflow passage in the vertical direction, the lower end of the passage is connected to the above-mentioned pipe. A channel partition is installed between the cold air circulation tank.

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