CN104034115B - direct cooling refrigerator - Google Patents

Abstract

The invention provides a kind of direct cooling refrigerator, it includes inner bag and the evaporation tube group being arranged on described inner bag, described evaporation tube group at least includes the first evaporation tube, the second evaporation tube and the energy-conservation part contacted with described second evaporation tube, described first evaporation tube and at least one in described second evaporation tube are for twining gallbladder formula, the heat transfer coefficient of described energy-conservation part is the most different from the heat transfer coefficient of described first evaporation tube and described second evaporation tube, thus frosting position can not only be control effectively by the direct cooling refrigerator of the present invention, energy-conservation effect can also be played simultaneously.

Description

direct cooling refrigerator

technical field

The invention relates to a direct cooling refrigerator, in particular to an energy-saving direct cooling refrigerator.

Background technique

A refrigerator is a device that uses the cooling effect of the refrigerant in the refrigeration circuit during compression, condensation, expansion, and evaporation to maintain the interior of the refrigerator at a low temperature, thereby preserving food.

The direct-cooling refrigerator maintains the temperature in the box at a low temperature by continuously driving the refrigeration circuit. The refrigerating evaporator of the existing direct-cooling refrigerator basically adopts a plate-tube or wire-tube design, so that when the existing direct-cooling refrigerator is used, the surface of the refrigerating evaporator will be in contact with the inside of the freezing compartment. The hot and humid air is in direct contact, and because the density of hot air is lower than that of cold air, a large amount of hot and humid air will gather in the front and upper part of the freezer compartment, resulting in obvious local frosting. With the increase of the service cycle, the temperature in the freezer room will easily rise due to the thick frost layer, which will not only cause the cooling performance of the direct cooling refrigerator to decline, but also cause high power consumption, seriously affecting the normal use by the user.

In view of this, it is necessary to improve the existing direct cooling refrigerator to solve the above problems.

Contents of the invention

The object of the present invention is to provide a novel direct cooling refrigerator, which has the function of energy saving.

In order to achieve the above-mentioned purpose of the invention, the present invention provides a direct cooling refrigerator, which includes an inner container and an evaporating tube group arranged on the inner container, and the evaporating tube group includes at least a first evaporating tube, a second evaporating tube and a The energy-saving element in contact with the second evaporating tube, at least one of the first evaporating tube and the second evaporating tube is a bile-wrapped type, and the heat transfer coefficient of the energy-saving element is the same as that of the first evaporating tube are different from the heat transfer coefficients of the second evaporating tubes.

As a further improvement of the present invention, the materials of the first evaporation tube and the second evaporation tube are both aluminum, and the material of the energy-saving element is copper.

As a further improvement of the present invention, the inner tank includes an opening side corresponding to the door body, a side wall adjacent to the opening side, and a rear wall opposite to the opening side, and the first evaporation tube is wound on the On the side wall of the inner tank, the second evaporation tube is arranged on the rear wall of the inner tank.

As a further improvement of the present invention, the first evaporation tube is wound from the rear of the inner tank to the front of the inner tank.

As a further improvement of the present invention, the second evaporating tube is a plate tube type, and the second evaporating tube is a D-shaped tube.

As a further improvement of the present invention, the first evaporating pipe is connected to a compressor, and the second evaporating pipe is arranged between the first evaporating pipe and the compressor, so that the refrigerant is first Flow through the second evaporating tube and then flow into the first evaporating tube.

As a further improvement of the present invention, a return pipe is also provided between the first evaporator pipe and the compressor, so that the refrigerant flows from the outlet of the first evaporator pipe first through the return pipe and then into the compressor .

As a further improvement of the present invention, the inner container includes a refrigerated inner container, and both the first evaporating tube and the second evaporating tube are arranged on the refrigerated inner container.

As a further improvement of the present invention, the inner container also includes a refrigerated inner container, and the evaporating tube set further includes a third evaporating tube arranged between the compressor and the second evaporating tube to cool the refrigerated inner container. The evaporating tube is configured such that the refrigerant flows from the outlet of the compressor first through the third evaporating tube and then into the second evaporating tube.

As a further improvement of the present invention, the evaporating tube group further includes a fourth evaporating tube arranged between the first evaporating tube and the return air tube to refrigerate the refrigerated liner, so that the refrigerant flows from the first The outlet of the evaporation tube first flows through the fourth evaporation tube and then flows into the air return tube.

Compared with the prior art, the present invention has the advantage that: the direct cooling refrigerator of the present invention is provided with a first evaporating pipe, a second evaporating pipe and an energy-saving element in contact with the second evaporating pipe on the inner container, the described At least one of the first evaporator tube and the second evaporator tube is of the bile-wrapped type, and the heat transfer coefficient of the energy-saving element is different from that of the first evaporator tube and the second evaporator tube, so that the present invention The invented direct cooling refrigerator can not only effectively control the frosting part, but also can save energy.

Description of drawings

Fig. 1 is a schematic diagram of the main internal structure of the direct cooling refrigerator of the present invention.

Fig. 2 is a schematic plan view of refrigerant flow in Fig. 1 .

FIG. 3 is a schematic cross-sectional view of the second evaporating tube in the direction A-A in FIG. 2 .

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 3, the direct cooling refrigerator of the present invention includes a refrigerator box (not shown), and a horizontal partition (not shown) is formed in the middle of the refrigerator box, and the refrigerator box A refrigerator compartment (not shown) and a freezer compartment (not shown) are respectively formed along the vertical direction centering on the partition wall. The front openings of the refrigerating chamber and the freezing chamber have a refrigerating chamber door (not shown) and a freezing chamber door (not shown) connected by hinges, and the refrigerating chamber door and the freezing chamber door The body rotates to open and close the refrigerating chamber and the freezing chamber of the refrigerator case.

The freezing chamber includes a freezing inner container 20 disposed inside the freezing chamber, and the freezing inner container 20 is provided with a first evaporating tube 30 and a second evaporating tube 40 for cooling the freezing inner container 20 . The freezer liner 20 includes an opening side 21 corresponding to the freezer door, four side walls 22 adjacent to the opening side 21 , and a rear wall 23 opposite to the opening side 21 . The first evaporating tube 30 is evenly wound on the four side walls 22 of the refrigerated inner container 20 in a coiled form, and is from the rear of the refrigerated inner container 20 to the front of the refrigerated inner container 20 Tangled.

The first evaporation pipe 30 is connected with a compressor (not shown). The second evaporator tube 40 is arranged between the compressor and the first evaporator tube 30, so that the refrigerant flows from the outlet of the compressor through the second evaporator tube 40 first and then flows into the first evaporator tube 30. Tube 30. The second evaporating tube 40 is fixedly arranged above the rear wall 23 of the refrigerated inner container 20 and is located behind the first evaporating tube 30 . In this embodiment, the second evaporating tube 40 is a D-shaped tube (but not limited to a D-shaped tube, it can also be other types of tubes), and is attached to the rear wall of the refrigerated inner container 20 in the form of a plate tube. 23; and in other embodiments, the position of the second evaporating tube 40 can be adjusted according to actual needs, and the second evaporating tube 40 can also be set to be embedded in the rear wall of the freezing inner container 20 The inflation type of 23 upper sides.

At present, there are three basic ways of heat transfer: heat conduction, convective heat transfer, and radiation heat transfer. The thermal conductivity is measured by the thermal conductivity, and the thermal conductivity itself is related to parameters such as material, density, moisture content, and temperature. The refrigerating inner container 20 of the present invention is provided with a heat exchange area, and at least two heat transfer coefficients are included in the heat exchange area.

The refrigerated inner container 20 is also provided with an energy-saving element 4 , the second evaporation tube 40 is attached to the energy-saving element 4 , and the energy-saving element 4 is further attached to the rear wall 23 of the refrigerated inner container 20 above, and the energy-saving element 4 and the second evaporation tube 40 are located in the heat exchange area. The energy-saving element 4 is made of a material with high thermal conductivity, so that the heat transfer coefficient of the energy-saving element 4 is higher than that of other parts in the freezing chamber (including the freezing inner container 20, the first evaporating tube 30 and The heat transfer coefficient of the second evaporating pipe 40), so that the temperature of the surface of the energy-saving element 4 will be lower than the temperature of other parts in the freezing chamber, and the hot and humid air inside the freezing chamber will be in the corresponding position of the energy-saving element The part of 4 is preferentially frosted. Specifically, the material of the energy-saving element 4 is copper, and the material of the first evaporation tube 30 and the second evaporation tube 40 is aluminum. In this embodiment, the energy-saving element 4 is arranged in a rectangular flat shape, so that the hot and humid air inside the freezing chamber frosts evenly at the position corresponding to the energy-saving element 4 , while in other embodiments, the energy-saving The shape of piece 4 can also be adjusted to regular figures such as circles or other irregular figures according to actual needs.

Furthermore, when the direct cooling refrigerator of the present invention is cooling, the hot and humid air inside the freezing chamber will preferentially accumulate at the position corresponding to the energy-saving element 4 and frost will form at this position, reducing the frosting of other parts in the freezing chamber The amount has achieved the effect of inducing frost, and also achieved the purpose of energy saving.

The refrigerating chamber includes a refrigerating inner container (not shown) arranged inside the refrigerating chamber, and a third evaporating pipe 11 and a fourth evaporating pipe 12 for cooling the refrigerating inner container. In this embodiment, the third evaporating tube 11 and the fourth evaporating tube 12 are both aluminum tubes, and the third evaporating tube 11 and the fourth evaporating tube 12 are both plate-tube-type and attached to the In other embodiments, the third evaporating tube 11 and the fourth evaporating tube 12 can also be configured as an inflatable type embedded in the refrigerating liner.

The first evaporating tube 30 , the second evaporating tube 40 , the third evaporating tube 11 , the fourth evaporating tube 12 and the energy-saving element 4 are connected together to form an evaporating tube group.

The third evaporator tube 11 is arranged between the compressor and the second evaporator tube 40, so that the refrigerant flows from the outlet of the compressor through the third evaporator tube 11 first and then flows into the second evaporator tube 40. Tube 40.

An air return pipe 50 is also provided between the first evaporator pipe 30 and the compressor, so that the refrigerant flows from the outlet 31 of the first evaporator pipe 30 first through the air return pipe 50 and then into the compressor. In this embodiment, the air return pipe 50 is arranged on one side of the refrigerated liner 20 in an S shape, but in other embodiments, the air return pipe 50 can also be arranged in a straight line, a spiral shape or other shapes. One side of the freezer inner container 20.

The fourth evaporator pipe 12 is arranged between the first evaporator pipe 30 and the return air pipe 50, so that the refrigerant flows from the outlet 31 of the first evaporator pipe 30 first through the fourth evaporator pipe 12 and then into the fourth evaporator pipe 12. The air return pipe 50.

In this way, when the direct cooling refrigerator of the present invention is in the normal operation of the refrigerating cycle system, first the refrigerant flows out from the compressor outlet and flows into the third evaporating pipe 11, then flows into the second evaporating pipe 40, and then flows into the The first evaporating pipe 30, and then, the refrigerant flows out from the outlet 31 of the first evaporating pipe 30, then flows into the fourth evaporating pipe 12, then flows through the return pipe 50, and finally flows back into the compressor, for the next cycle.

In the direct cooling refrigerator box of the present invention, a temperature field is formed from back to front and from top to bottom, so that the hot and humid air entering the refrigerator box can automatically circulate to the corresponding temperature field under the action of the above temperature field. The position of the energy-saving component 4 is preferentially frosted at this position, so as to further reduce the amount of frost formed in other parts of the freezing chamber, thereby controlling the frosting position in the freezing chamber of the direct-cooling refrigerator, thereby achieving the effect of energy saving.

To sum up, in the direct cooling refrigerator of the present invention, a heat exchange area and an evaporating tube group are arranged on the freezer inner container 20, and in the heat exchange area, the heat transfer coefficient of the energy-saving element 4 is higher than the set The heat transfer coefficient of the second evaporator tube 40, so that the hot and humid air inside the freezer compartment will preferentially gather to the position corresponding to the energy-saving element 4 along with the eddy current of the temperature field, and frost will form at this position, so that the cooling performance of the system reaches At the same time as required, not only the amount of frosting inside the freezing chamber is significantly reduced, the frosting position is effectively controlled, but also energy saving is achieved.

The above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced. Without departing from the spirit and scope of the technical solution of the present invention.

Claims (10)

1. a direct cooling refrigerator, including inner bag and the evaporation tube group being arranged on described inner bag, it is characterized in that: described evaporation tube group at least includes the first evaporation tube, the second evaporation tube and the energy-conservation part contacted with described second evaporation tube, described first evaporation tube and at least one in described second evaporation tube are for twining gallbladder formula, and the heat transfer coefficient of described energy-conservation part is the most different from the heat transfer coefficient of described first evaporation tube and described second evaporation tube.

Direct cooling refrigerator the most according to claim 1, it is characterised in that: described first evaporation tube is aluminum with the material of described second evaporation tube, and the material of described energy-conservation part is copper.

Direct cooling refrigerator the most according to claim 1, it is characterized in that: described inner bag includes sidewall that the open side of corresponding door body is adjacent with described open side and the rear wall relative with described open side, described first evaporation tube is wrapped on the sidewall of described inner bag, and described second evaporation tube is arranged on the rear wall of described inner bag.

Direct cooling refrigerator the most according to claim 3, it is characterised in that: described first evaporation tube is to the anterior winding of described inner bag from the rear portion of described inner bag.

Direct cooling refrigerator the most according to claim 3, it is characterised in that: described second evaporation tube is band-tube type, and described second evaporation tube is heat absorption plate core structure.

Direct cooling refrigerator the most according to claim 1, it is characterized in that: described first evaporation tube and a compressor are connected, described second evaporation tube is arranged between described first evaporation tube and described compressor, so that cold-producing medium first flows through described second evaporation tube and flows to described first evaporation tube again from compressor outlet.

Direct cooling refrigerator the most according to claim 6, it is characterised in that: it is additionally provided with muffler between described first evaporation tube and described compressor, so that cold-producing medium first flows through described muffler from the first evaporation tube outlet flows to described compressor again.

Direct cooling refrigerator the most according to claim 7, it is characterised in that: described inner bag includes freezing inner bag, and described first evaporation tube and described second evaporation tube are arranged on described freezing inner bag.

Direct cooling refrigerator the most according to claim 8, it is characterized in that: described inner bag also includes cold preservation inner bag, described evaporation tube group also includes being arranged between described compressor and described second evaporation tube the 3rd evaporation tube to freeze described cold preservation inner bag, so that cold-producing medium first flows through described 3rd evaporation tube and flows to described second evaporation tube again from compressor outlet.

Direct cooling refrigerator the most according to claim 9, it is characterized in that: described evaporation tube group also includes being arranged between described first evaporation tube and described muffler the 4th evaporation tube to freeze described cold preservation inner bag, so that cold-producing medium first flows through described 4th evaporation tube from the first evaporation tube outlet flows to described muffler again.