WO2020125446A1 - Defrosting apparatus - Google Patents

Abstract

A defrosting apparatus (10), which comprises two glass tube heaters (12A, 12B), and two plate-like top mechanisms (14A, 14B) which are provided above the two glass tube heaters (12A, 12B), respectively; at least two top mechanisms (14A, 14B) are inclined at a predetermined angle relative to a horizontal surface, or the glass tube heaters (12A, 12B) configured at the front and back order are paired with the top mechanisms (14A, 14B) to be placed at different heights. The defrosting apparatus may prevent water dripping below an evaporator from dripping onto the glass tube heaters, while heat from the glass tube heaters is easily transferred to the evaporator, and air circulating inside of a case may flow smoothly into the evaporator.

Description

Defrost device Technical field

The invention relates to a defrosting device for removing frost attached to an evaporator of a refrigerator.

Background technique

In order to melt and remove frost attached to the evaporator of the refrigerator, in most cases, a defrosting device having a glass tube heater is installed on the lower side of the evaporator. The glass tube heater of this defrosting device needs to meet the IEC standard. The temperature of the outer surface of the quartz glass tube must not be higher than 360°C when heating. Therefore, the relatively low temperature glass tube heater may not melt the frost attached to the evaporator in a short time.

In order to solve this problem, a refrigerator is proposed in which two glass tube heaters are arranged side by side on the lower side of the evaporator (see Patent Document 1, for example). In the refrigerator described in Patent Document 1, in order to prevent the water melted by the heat of the glass tube heater from dripping onto the glass tube heater from the evaporator, a horizontal plate-shaped top member is arranged above each of the two glass tube heaters .

Patent Document 1: JP Patent Publication No. 2002-267331

However, since the upper part of the glass tube heater covers the horizontal plate-shaped top member, the heat transfer of the glass tube heater is hindered by the top member, causing a problem that the defrosting time of the evaporator is long. Furthermore, there is a problem that when the refrigerator is cooled, when the gas circulating in the box returns to the lower side of the evaporator, the airflow is blocked by the horizontal plate-shaped top member and cannot smoothly flow in.

Summary of the invention

An object of the present invention is to provide a defrosting device that can prevent water droplets dripping from the evaporator from reaching the glass tube heater, and that the heat of the glass tube heater is easily transferred to the evaporator and is in the box. The circulating gas can flow smoothly into the evaporator.

In order to solve the aforementioned problems, the defrosting device according to the present invention includes: two glass tube heaters, which are arranged below the evaporator of the refrigerator, and are arranged parallel to the front-rear direction of the refrigerator; They are respectively provided above the two glass tube heaters and extend along the axial direction of the glass tube heater in such a way as to cover the two glass tube heaters; When viewed, at least two of the top members are inclined at a predetermined angle with respect to a horizontal plane, or the pair of the glass tube heater and the top member arranged in front and rear are arranged at different heights.

In the present invention, when viewed from the axial direction of the glass tube heater and viewed from the side, there may be three forms: (1) The two top members are inclined at a predetermined angle with respect to the horizontal plane, and the front and rear glass tube heaters and the top member are arranged For the case of being arranged at the same height, (2) the two top members are arranged horizontally, and the pair of front and rear glass tube heaters and the top member are arranged at different heights, and (3) the two top members are relative to the horizontal plane to The case where the predetermined angle is inclined and the pair of glass tube heaters and the top member arranged at the front and rear are arranged at different heights.

In the present invention, the defrosting device of the present invention can be realized in any of the three forms described above, and even if it is provided with a top member that prevents water dripping from the evaporator from reaching the heater, the heat of the heater is easily transferred to the evaporator And the gas circulating in the tank can smoothly flow into the evaporator.

In addition, the predetermined angle is within a range of 10 degrees or more and 40 degrees or less.

When the predetermined angle is less than 10 degrees, the heat transfer of the glass tube heater to the evaporator and the flow of gas to the evaporator are easily affected by the top member. On the other hand, when the predetermined angle is greater than 40 degrees, the distance between the evaporator and the glass tube heater needs to be longer, so there is a possibility of affecting the heat transfer from the glass tube heater to the evaporator.

Thus, when the inclination angle of the top member is within the range of 10 degrees or more and 40 degrees or less, the heat of the glass tube heater is easily transferred through the evaporator, and the gas circulating in the tank can flow into the evaporator more smoothly.

In addition, the inclination directions of the two top members are different from each other.

When viewed from the axial direction of the glass tube heater and viewed from the side, when the inclination directions of the two top members are different from each other, the following situations may occur: (1) The top member located on the front side is inclined in such a manner that the front side is higher than the rear side and the side is lower , The top member located on the rear side is inclined to the front side with a low rear height, and is arranged in an inverted “eight” shape; and (2) the top member located on the front side is inclined with a front low and rear side high, located on the top of the rear side The components are inclined in a way that the front side is high and the back side is low, and are arranged in an "eight" shape.

According to the present invention, by setting the slope of the top member corresponding to the frosting form of the evaporator, a defrosting device capable of effectively defrosting can be provided.

In addition, both of the top members are inclined so that the front side is low and the rear side is high.

In the present invention, the gas circulating in the tank flows from the lower front to the upper rear and flows into the lower part of the evaporator. In this case, if the front side is low and the rear side is high, the inclination corresponds to the flow, and the gas circulating in the tank can flow into the evaporator more smoothly. At the same time, by tilting the top member, the heat of the glass tube heater can be efficiently transferred to the evaporator.

In addition, the pair of the glass tube heater on the rear side and the top member on the rear side is arranged higher than the pair of the glass tube heater on the front side and the top member on the front side.

In the present invention, the pair of glass tube heaters on the rear side and the top member on the rear side is arranged higher than the pair of glass tube heaters on the front side and the top member on the front side. Therefore, the arrangement corresponds to that of the gas circulating in the tank flow. Thus, the gas circulating in the tank can flow into the evaporator more smoothly. In addition, the heights of the pair of front and rear glass tube heaters and the top member are different, so the heat of the glass tube heater can be efficiently transferred to the evaporator.

Effect of invention

In addition, side plates are connected to both sides of the top member, and the side plates are respectively formed with recesses fitted to the outer diameter of the glass tube heater. The material of the top member and the side plate is metal or ceramic.

As described above, in the present invention, a defrosting device can be provided, which can prevent water droplets dripping from the evaporator from reaching the glass tube heater, while the heat of the glass tube heater is easily transferred to the evaporator and circulates in the tank Gas can flow smoothly into the evaporator.

BRIEF DESCRIPTION

1 is a side cross-sectional view schematically showing a refrigerator provided with a defrosting device according to an embodiment of the present invention.

2A is a side view schematically showing the defrosting device according to the first embodiment of the present invention.

2B is a perspective view and a side view showing the structure of the defrosting device according to the first embodiment of the present invention.

3A is a side view schematically showing a defrosting device according to a second embodiment of the present invention.

3B is a perspective view showing the structure of the defrosting device according to the second embodiment of the present invention.

3C is a side view showing the structure of the defrosting device according to the second embodiment of the present invention.

4A is a side view schematically showing a defrosting device according to a third embodiment of the present invention.

4B is a perspective view showing the structure of the defrosting device according to the third embodiment of the present invention.

4C is a side view showing the structure of the defrosting device according to the third embodiment of the present invention.

FIG. 5 is a side view schematically showing the angle θ of the top member with respect to the horizontal plane.

6A is a side view schematically showing a conventional defrosting device.

6B is a perspective view showing the structure of a conventional defrosting device.

6C is a side view showing the structure of a conventional defrosting device.

7A is a side view schematically showing a defrosting device according to a fourth embodiment of the present invention.

7B is a perspective view showing the configuration of the defrosting device according to the fourth embodiment of the present invention.

7C is a side view showing the configuration of the defrosting device according to the fourth embodiment of the present invention.

8A is a side view schematically showing a defrosting device according to a fifth embodiment of the present invention.

8B is a perspective view showing the structure of the defrosting device according to the fifth embodiment of the present invention.

8C is a side view showing the structure of the defrosting device according to the fifth embodiment of the present invention.

9A is a side view schematically showing a defrosting device according to a sixth embodiment of the present invention.

9B is a perspective view showing the structure of the defrosting device according to the sixth embodiment of the present invention.

9B is a side view showing the structure of the defrosting device according to the sixth embodiment of the present invention.

10A is a side view schematically showing a defrosting device according to a seventh embodiment of the present invention.

10B is a perspective view showing the structure of the defrosting device according to the seventh embodiment of the present invention.

10C is a side view showing the structure of the defrosting device according to the seventh embodiment of the present invention.

2--refrigerator, 4A--freezer, 4B--refrigerator, 6A--lower door, 6B--upper door, 8A, 8B--inlet side flow path, 10--defrost device, 12A, 12B-- Glass tube heater, 14A, 14B--top member, 16A, 16B--side plate, 20--compressor, 22--evaporator, 24---fan, 26--damper, 30--drainage mechanism, 32--evaporation dish, 110--defrost device, 112A, 112B--glass tube heater, 114A, 114B--top member, 116A, 116B--side plate, 122--evaporator.

detailed description

Hereinafter, embodiments for implementing the present invention will be described with reference to the drawings. In addition, the defrosting device described below is for embodying the technical idea of the present invention, and unless otherwise specified, the present invention is not limited to the following description.

In each drawing, the same symbols are attached to members having the same function. In consideration of the focused description and the ease of understanding, the embodiments are sometimes shown separately for convenience, but the configurations shown in different embodiments may be partially replaced or combined. In the embodiments to be described later, the descriptions of the contents common to those already explained are omitted, and only the differences are explained. In particular, the same effects brought by the same configuration will not be repeated in each embodiment. The size, positional relationship, etc. of the members shown in the drawings are sometimes exaggerated to clearly explain.

(Refrigerator equipped with a defrosting device according to an embodiment)

1 is a side cross-sectional view schematically showing a refrigerator 2 provided with a defrosting device 10 according to an embodiment of the present invention. The refrigerator 2 shown in FIG. 1 includes a freezer compartment 4A that can be opened and closed by a lower door 6A, and a refrigerator compartment 4B that can be opened and closed by an upper door 6B. On the back side of the freezer compartment 4A and the refrigerator compartment 4B, inlet- side flow paths 8A and 8B partitioned by a partition plate 28 are provided, respectively. An evaporator 22 is arranged on the inlet-side flow path 8A on the freezing compartment 4A side, a fan 24 is arranged above it, and a defrost device 10 according to this embodiment is arranged below it.

A compressor 20 communicating with the evaporator 22 is arranged in the external machine room on the back side of the freezer compartment 4A. The following cycle is repeated: the refrigerant (gas) compressed by the compressor 20 is liquefied by the condenser, and the liquefied refrigerant is vaporized by taking the heat of the gas in the tank through the evaporator 22, and the vaporized refrigerant is compressed by the compressor 20 compressed again. The damper 26 is arranged between the inlet-side flow path 8A on the freezing compartment 4A side and the inlet-side flow path 8B on the refrigerator compartment 4B side. In FIG. 1, the damper 26 is in a closed state.

When the damper 26 is turned off, when the compressor 20 and the fan 24 are driven, the gas in the freezer compartment 4A flows, and the cool air after passing through the evaporator 22 flows into the freezer compartment 4A from the outlet 28A provided in the partition plate 28. The inflowing gas circulates in the freezer compartment 4A, and returns to the lower side of the evaporator 22 in the inlet-side flow path 8A again. The gas cooled by the evaporator 22 is circulated in this way, and the inside of the freezer compartment 4A can be cooled.

When the damper 26 is in the open state, when the compressor 20 and the fan 24 are driven, the cold air passing through the evaporator 22 flows not only into the freezer compartment 4A but also into the inlet-side flow path 8B on the refrigerator compartment 4B side. The gas that has flowed into the inlet-side flow path 8B flows into the refrigerating compartment 4B from each outlet 28B provided in the partition plate 28. The inflowing gas circulates in the refrigerator compartment 4B, passes through the freezing compartment 4A, and returns to the lower side of the evaporator 22 in the inlet-side flow path 8A. Like the freezing compartment 4A, the gas cooled by the evaporator 22 is circulated in this way, and the inside of the refrigerating compartment 4B can be cooled.

On the surface of the heat exchange tube of the evaporator 22, frost formed by condensation of moisture contained in the air to be cooled is attached. If a large amount of frost adheres to the heat exchange tube, the cooling performance is reduced, so the evaporator 22 needs to be defrosted regularly. Therefore, the defrosting device 10 is arranged below the evaporator 22.

The defrosting device 10 includes two glass tube heaters. When the compressor 20 and the fan 24 are not in operation, the glass tube heater is turned on. The convective heat transfer caused by the radiant heat transfer of the glass tube heater and the surrounding air warming rises , You can make the heat exchange tube hot and defrost. The water falling from the evaporator 22 due to defrosting flows into the evaporating dish 32 disposed in the machine room through the drainage mechanism 30 disposed below the evaporator 22. Thereby, defrosting of the evaporator 22 can be realized, and the gas cooling performance of the evaporator 22 can be maintained.

(Defrost device according to the first embodiment)

2A is a side view schematically showing the defrosting device 10 according to the first embodiment of the present invention. 2B is a perspective view showing the structure of the defrosting device 10 according to the first embodiment of the present invention, and FIG. 2C is a side view showing the structure of the defrosting device 10 according to the first embodiment of the present invention. 6A is a side view schematically showing a conventional defrosting device 110. 6B is a perspective view showing the structure of the conventional defrosting device 110, and FIG. 6C is a side view showing the structure of the conventional defrosting device 110. 2B and 6B are perspective views showing the structure of the lower region of the evaporator 22 (122) and the structure of the defrosting device 10 (110), and FIGS. 2C and 6C are views showing the lower region of the evaporator 22 (122) when viewed from the side And a side view of the defrosting device 10 (110). In FIGS. 2A, 3A, 4A, 6A, 7A, 8A, 9A, and 10A, the dashed arrows indicate the heat transfer method, and the dotted line indicates the flow of gas.

<Existing defrosting device>

The existing defrosting device 110 shown in FIGS. 6A, B, and C includes two glass tube heaters 112A, 112B. The two glass tube heaters 112A, 112B are disposed below the evaporator 122 of the refrigerator 2 with respect to The front-back direction of the refrigerator is arranged substantially parallel. The heat generating regions of the glass tube heaters 112A and 112B have an elongated cylindrical shape. The glass tube heaters 112A and 112B conform to the IEC standard, so the outer surface temperature of the quartz glass tube when heating is not higher than 360°C.

The defrosting device 110 further includes two top members 114A, 114B in the shape of flat plates, which are provided above the two glass tube heaters 112A, 112B, respectively, to cover the two glass tubes The heater 112A, 112B extends along the axial direction of the glass tube heaters 112A, 112B. The pair of the glass tube heater 112A arranged on the front side and the top member 114A, and the pair of the glass tube heater 112B arranged on the rear side and the top member 114B are arranged at substantially the same height.

In the conventional defrosting device 110, the two top members 114A, 114B are arranged horizontally at approximately the same height, and cover the upper parts of the glass tube heaters 112A, 112B. Therefore, when the glass tube heaters 112A, 112B are turned on to defrost the evaporator 122, the radiant heat of the glass tube heaters 112A, 112B is blocked by the top members 114A, 114B, and cannot reach the evaporator 122.

In addition, a part of the upward airflow generated by the heating of the glass tube heaters 112A, 112B flows into the evaporator 122 from the gap between the top members 114A, 114B, but more of the airflow hits the top members 114A, 114B vertically. Therefore, the gas heated by the glass tube heaters 112A, 112B stays under the glass tube heaters 112A, 112B, and it is difficult to reach the evaporator 122, and sufficient convective heat transfer cannot be achieved. In particular, when the water falling from the evaporator 22 due to defrosting does not drip down to the glass tube heaters 112A, 112B but falls downward, and the ends of the top members 114A, 114B are bent downward, the glass tube heater The gas heated by 112A, 112B is particularly likely to stay under the top members 114A, 114B. Therefore, even if the two glass tube heaters 112A and 112B are turned on, sufficient radiant heat transfer and convection heat transfer cannot be achieved, and the defrosting of the evaporator 122 may take a very long time.

Furthermore, when the refrigerator is cooled, when the gas circulating in the freezer compartment and the refrigerator compartment flows into the lower part of the evaporator 122 from the oblique lower side, it is also blocked by the top members 114A and 114B that are horizontally arranged at approximately the same height, so it is difficult to flow into the evaporator 122. Therefore, it is possible to hinder the gas cooling efficiency of the evaporator 122.

<Defrost device according to the first embodiment>

The defrosting device 10 according to the first embodiment of the present invention includes two glass tube heaters 12A, 12B, which are provided below the evaporator 22 of the refrigerator 2 with respect to the refrigerator Are arranged substantially parallel in the front-rear direction. The heat generating regions of the glass tube heaters 12A and 12B have an elongated cylindrical shape. The glass tube heaters 112A and 112B conform to the IEC standard, so the outer surface temperature of the quartz glass tube when heating is not higher than 360°C. In order to achieve defrosting, a heater using a double quartz glass tube may be used, or a heater having a heavy quartz glass tube using a low-temperature heating element such as a carbon fiber heating element may be used. Furthermore, the two glass tube heaters 12A and 12B may be a straight tube portion of an integrated heater connected in a "U" shape.

The defrosting device 10 further includes two top members 14A, 14B in the shape of flat plates, which are provided above the two glass tube heaters 12A, 12B, respectively, to cover the two glass tubes The heaters 12A and 12B extend in the axial direction of the glass tube heaters 12A and 12B. In consideration of heat resistance and high reflectivity, the top members 14A and 14B are preferably formed of a metal thin plate, for example, an aluminum thin plate material. The pair of the glass tube heater 12A arranged on the front side and the top member 14A and the pair of the glass tube heater 12B arranged on the rear side and the top member 14B are arranged at substantially the same height.

The top members 14A and 14B according to the first embodiment are inclined at a predetermined angle with respect to the horizontal plane. In particular, the inclination directions of the two top members 14A, 14B are different from each other. In more detail, the top member 14A located on the front side is inclined so that the front side is high and the rear side is low, and the top member 14B located on the rear side is inclined so that the front side is low and the rear side is high. Thus, viewed from the axial direction of the glass tube heaters 12A, 12B, the two top members 14A, 14B are arranged in an inverted “eight” shape.

Therefore, in order to defrost the evaporator 22, when the glass tube heaters 12A and 12B are turned on, the radiant heat of the glass tube heaters 12A and 12B is along the top members 14A and 14B in comparison with the case where the top member is horizontal. The components on the inclined surface and the components at close angles easily reach the evaporator 22. Thus, compared with the conventional defrosting device 110, more efficient radiant heat transfer can be achieved.

In addition, the upward airflow heated by the glass tube heaters 12A, 12B flows into the evaporator 22 from the gap between the top members 14A, 14B. Furthermore, the ascending air current heated by the glass tube heaters 12A, 12B flows from the rear lower side to the front upper side along the inclined surface of the top member 14A on the front side, and flows into the evaporator 22 from the front side of the top member 14A. The ascending air current heated by the glass tube heaters 12A, 12B flows from the front lower side to the rear upper side along the inclined surface of the rear top member 14B, and flows into the evaporator 22 from the rear side of the top member 14B.

Thus, compared with the conventional defrosting device 110, more effective convection heat transfer can be achieved. In particular, heat can be transferred from the front side of the top member 14A, between the top members 14A, 14B, and the rear side of the top member 14B, so the heat can be transferred to the evaporator 22 as a whole.

Furthermore, when the refrigerator 2 cools, when the gas circulating in the freezing compartment 4A and the refrigerating compartment 4B flows into the lower part of the evaporator 22 from the oblique lower side, it also follows the inclined surface of the top members 14A and 14B from the oblique lower side to the oblique upper side The flow smoothly flows into the lower part of the evaporator 22 from the front side of the top member 14A, between the top members 14A and 14B, and the rear side of the top member 14B. Thus, efficient gas cooling of the evaporator 122 can be achieved.

In addition, since the top members 14A and 14B are arranged obliquely, the water falling from the evaporator 22 after defrosting flows and falls on the top members 14A and 14B to be easily discharged to the drainage mechanism 30 below.

<Structure of defrosting device>

Next, the structure of the defrosting device 10 according to the first embodiment will be described with reference to FIGS. 2B and 2C. The side plate 16A is connected to both sides of the top member 14A, and the side plate 16B is connected to both sides of the top member 14B. The side plates 16A and 16B are respectively formed with recesses fitted to the outer diameters of the glass tube heaters 12A and 12B. Thus, by fitting the concave portions of the side plates 16A, 16B to the outer diameters of the glass tube heaters 12A, 12B, the top members 14A, 14B can be easily arranged so as to cover above the glass tube heaters 12A, 12B.

For example, the top member 14A and the side plates 16A on both sides, and the top member 14B and the side plates 16B on both sides may be integrally formed by bending an aluminum thin plate. However, the materials of the top members 14A and 14B and the side plates 16A and 16B are not limited to aluminum, and any other metal materials such as steel and copper, ceramics, and the like may be used. In addition, the top members 14A, 14B and the side plates 16A, 16B may be separately formed and then joined. With the structure as described above, the defrosting device 10 including the glass tube heaters 12A, 12B and the top members 14A, 14B can be easily manufactured at a low manufacturing cost.

As described above, in the present embodiment, the two top members 14A, 14B are inclined at a predetermined angle with respect to the horizontal plane, and thus the following defrosting device 10 can be realized although it is provided to prevent water droplets dripping from the evaporator 22 from reaching the glass tube heater 12A 12B, the top members 14A, 14B, but the heat of the glass tube heaters 12A, 12B is still easily transferred to the evaporator 22, and the gas circulating in the tank can smoothly flow into the evaporator 22. Thus, by turning on the two glass tube heaters 12A, 12B, even if the surface temperature of the heater is not higher than 360°C, the effective defrosting of the evaporator 22 can be achieved.

In particular, in the first embodiment, the two top members 14A, 14B are arranged in an inverted “eight” shape, so the heat of the glass tube heaters 12A, 12B can be taken from the front side of the top member 14A, the top members 14a, 14B Between and the rear side of the top member 14B is transferred to the evaporator 22. Thereby, heat can be transferred to the entire evaporator 22, which is particularly effective when the entire evaporator 22 is frosted.

(Defrost device according to the second embodiment)

3A is a side view schematically showing the defrosting device 10 according to the second embodiment of the present invention. 3B is a perspective view showing the structure of the defrosting device 10 according to the second embodiment of the present invention, and a perspective view showing the lower region of the evaporator 22 and the structure of the defrosting device 10; FIG. 3C is a second view showing the present invention. The side view of the structure of the defrosting device 10 according to the embodiment is a side view of the lower region of the evaporator 22 and the defrosting device 10 viewed from the lateral direction.

The defrosting device 10 according to the second embodiment also includes two glass tube heaters 12A and 12B provided below the evaporator 22 and substantially parallel to the front-back direction of the refrigerator To configure. Further, the defrosting device 10 includes two top members 14A, 14B in a flat plate shape, which are provided above the two glass tube heaters 12A, 12B, respectively, to cover the two glasses The tube heaters 12A, 12B extend in the axial direction of the glass tube heaters 12A, 12B. The pair of the glass tube heater 12A and the top member 14A and the pair of the glass tube heater 12B and the top member 14B arranged in the front and rear are arranged at substantially the same height.

Like the first embodiment, the top members 14A and 14B according to the second embodiment are also inclined at a predetermined angle with respect to the horizontal plane, and the inclination directions of the two top members 14A and 14B are different from each other. However, in the second embodiment, the top member 14A located on the front side is inclined so that the front side is low and the rear side is high, and the top member 14B located on the rear side is inclined so that the front side is high and the rear side is low. This is different from the first embodiment. . That is, in the present embodiment, the two top members 14A, 14B are arranged in an “eight” shape when viewed from the axial direction of the glass tube heaters 12A, 12B.

Therefore, when the glass tube heaters 12A, 12B are turned on for defrosting of the evaporator 22, the radiant heat of the glass tube heaters 12A, 12B is along the top member 14A compared to the case where the top members 14A, 14B are horizontal The components of the inclined surface of 14B and the components at close angles easily reach the evaporator 22. Thus, compared with the conventional defrosting device 110, more efficient radiant heat transfer can be achieved.

In particular, in the second embodiment, the ascending air flow heated by the glass tube heaters 12A, 12B easily flows along the inclined surface of the top member 14A on the front side from the front lower side to the rear upper side, and from the top members 14A, 14B The gap between flows into the evaporator 22. Similarly, the ascending air current heated by the glass tube heaters 12A, 12B easily flows along the inclined surface of the rear top member 14B from the rear lower side to the front upper side, and flows into the evaporation from the gap between the top members 14A, 14B器22. In addition, a part of the upward airflow heated by the glass tube heaters 12A and 12B flows into the evaporator 22 from the front side of the top member 14A and the rear side of the top member 14B. In the second embodiment, more heat can be transferred between the top members 14A and 14B, so the heat can be transferred to the central portion of the evaporator 22 in the front-rear direction more efficiently.

Furthermore, when the refrigerator 2 cools, the gas circulating in the freezing compartment 4A and the refrigerating compartment 4B flows into the lower part of the evaporator 22 from the obliquely lower side, and also obliquely upward from the obliquely lower side along the inclined surfaces of the top members 14A, 14B Side flows and smoothly flows into the lower part of the evaporator 22 from the front side of the top member 14A, between the top members 14A and 14B, and the rear side of the top member 14B. Thus, effective gas cooling of the evaporator 22 can be achieved.

In addition, since the top members 14A and 14B are arranged obliquely, the water falling from the evaporator 22 due to defrosting flows and falls on the top members 14A and 14B and is easily discharged to the drainage mechanism 30 below.

As described above, in the second embodiment, since the two top members 14A and 14B are arranged in an “eight” shape, the heat of the glass tube heaters 12A and 12B is easily transferred between the top members 14A and 14B. Thereby, heat can be efficiently transferred to the central portion of the evaporator 22, so it is particularly effective when the central portion of the evaporator 22 is prone to frost.

The structure of the defrosting device 10 is the same as that of the first embodiment, so a more detailed description is omitted.

As described above, in the first and second embodiments, the inclination directions of the two top members 14A and 14B are different from each other. Therefore, by setting the slopes of the top members 14A and 14B according to the frost formation of the evaporator 22, A defrosting device 10 that can effectively defrost can be provided.

(Defrost device according to the third embodiment)

4A is a side view schematically showing a defrosting device according to a third embodiment of the present invention. 4B is a perspective view showing the structure of the defrosting device according to the third embodiment of the present invention, which is a perspective view showing the lower region of the evaporator 22 and the structure of the defrosting device 10; FIG. 4C is a third view of the present invention. The side view of the structure of the defrosting device according to the embodiment is a side view of the lower region of the evaporator 22 and the defrosting device 10 viewed from the lateral direction.

The defrosting device 10 according to the third embodiment also includes two glass tube heaters 12A and 12B provided below the evaporator 22 and substantially parallel to the front-rear direction of the refrigerator To configure. Further, the defrosting device 10 includes two top members 14A, 14B in a flat plate shape, which are provided above the two glass tube heaters 12A, 12B, respectively, to cover the two glasses The tube heaters 12A, 12B extend in the axial direction of the glass tube heaters 12A, 12B. The pair of the glass tube heater 12A and the top member 14A and the pair of the glass tube heater 12B and the top member 14B arranged in the front and rear are arranged at substantially the same height.

Similarly to the first and second embodiments, the top members 14A and 14B according to the third embodiment are also inclined at a predetermined angle with respect to the horizontal plane. However, in the third embodiment, the two top members 14A and 14B are inclined so that the front side is low and the rear side is high, which is different from the first and second embodiments.

In the third embodiment, the height of the rear end portion of the top member 14A disposed on the front side is different from the height of the front end portion of the top member 14B disposed on the rear side. Therefore, in the front-rear direction, even if the top members 14A, 14B There is no gap between them, and the top members 14A and 14B will not dry out. For example, when viewed from above, the top member 14A and the top member 14B do not interfere with each other even if they are arranged to overlap in the front-rear direction.

This can reduce the size between the front end portion of the front top member 14A and the rear end portion of the rear top member 14B. Accordingly, even when the evaporator 22 having a small size in the front-rear direction is used, defrosting can be appropriately performed.

When the glass tube heaters 12A and 12B are turned on for defrosting of the evaporator 22, the radiant heat of the glass tube heaters 12A and 12B is along the inclined surface of the top members 14A and 14B compared to when the top member is horizontal And the components at close angles easily reach the evaporator 22. Thus, compared with the conventional defrosting device 110, more efficient radiant heat transfer can be achieved.

In particular, in the third embodiment, the ascending air flow heated by the glass tube heaters 12A, 12B easily flows along the inclined surface of the front top member 14A from the front lower side to the rear upper side, and from the top members 14A, 14B The gap between flows into the evaporator 22. Similarly, the upward airflow heated by the glass tube heaters 12A, 12B easily flows along the inclined surface of the rear top member 14B from the front lower side to the rear upper side, and flows into the evaporator 22 from the rear side of the top member 14B. In addition, a part of the upward airflow heated by the glass tube heaters 12A, 12B flows into the evaporator 22 from the front side of the top member 14A.

In the third embodiment, more heat can be transferred from between the top members 14A and 14B and behind the top member 14B, so the heat can be more efficiently transferred to the center and back of the evaporator 22 in the front-rear direction.

Furthermore, during normal cooling, the gas circulating in the tank flows from the front obliquely lower side to the rear obliquely upper side and flows into the lower part of the evaporator 22. In this case, the inclination of the front side low and the rear side high conforms to the flow, and the gas circulating in the tank can flow into the evaporator 22 more smoothly. Thus, the evaporator 22 can achieve effective gas cooling. In addition, since the top members 14A and 14B are arranged obliquely, the defrosted water falling from the evaporator 22 flows and falls on the top members 14A and 14B to be easily discharged to the drainage mechanism 30 below.

As described above, in the third embodiment, the two top members 14A and 14B are inclined so that the front side is low and the rear side is high. Therefore, the gas circulating in the tank during normal cooling can smoothly flow into the evaporator 22, thereby achieving effective cool down. At the same time, by tilting the top members 14A, 14B, the heat of the glass tube heaters 12A, 12B can be efficiently transferred to the central portion and the rear portion of the evaporator 22, so the central portion and the rear portion of the evaporator 22 are easily attached Especially effective in the case of frost.

The structure of the defrosting device 10 is the same as that of the first embodiment, so a more detailed description is omitted.

(Inclination angle of top member)

FIG. 5 is a side view schematically showing the angle θ of the top members 14A and 14B with respect to the horizontal plane. When the angle θ of the top members 14A and 14B with respect to the horizontal plane is less than 10 degrees, the heat transfer of the glass tube heaters 12A and 12B to the evaporator 22 and the flow of gas to the evaporator 22 are easily affected by the top members 14A and 14B. On the other hand, when the angle θ is greater than 40 degrees, a longer distance is required between the evaporator 22 and the glass tube heaters 12A, 12B, so it may affect the heat transfer from the glass tube heaters 12A, 12B to the evaporator 22 .

Therefore, the angle θ of the top members 14A, 14B with respect to the horizontal plane is preferably within a range of 10 degrees or more and 40 degrees or less. If the angle θ is within this range, the heat of the glass tube heaters 12A, 12B is more easily transferred to the evaporator 22, The gas circulating in the tank can flow into the evaporator 22 more smoothly.

(Defrost device according to the fourth embodiment)

7A is a side view schematically showing a defrosting device according to a fourth embodiment of the present invention. 7B is a perspective view showing the structure of the defrosting device according to the fourth embodiment of the present invention, which is a perspective view showing the lower region of the evaporator 22 and the structure of the defrosting device 10; FIG. 7C is a fourth view of the present invention. The side view of the structure of the defrosting device according to the embodiment is a side view of the lower region of the evaporator 22 and the defrosting device 10 viewed from the lateral direction.

The defrosting device 10 according to the fourth embodiment also includes two glass tube heaters 12A and 12B provided below the evaporator 22 and substantially parallel to the front-rear direction of the refrigerator To configure. Further, the defrosting device 10 includes two top members 14A, 14B in a flat plate shape, which are provided above the two glass tube heaters 12A, 12B, respectively, to cover the two glasses The upper part of the tube heaters 12A, 12B extends in the axial direction of the glass tube heaters 12A, 12B.

However, the pair of the glass tube heater 12A arranged on the front side and the top member 14A and the pair of the glass tube heater 12B arranged on the rear side and the top member 14B are arranged at different heights, which is different from the first to third The implementation is different. In the fourth embodiment, the two top members 14A and 14B are arranged substantially horizontally.

In the fourth embodiment, the two top members 14A, 14B arranged in front and rear are arranged at different heights, so the top members 14A, 14B will not interfere even if there is no predetermined gap between the top members 14A, 14B in the front-rear direction. . For example, when viewed from above, the top member 14A and the top member 14B do not interfere with each other even if they are arranged to overlap in the front-rear direction.

This can reduce the size between the front end portion of the front top member 14A and the rear end portion of the rear top member 14B. Accordingly, even when the evaporator 22 having a small size in the front-rear direction is used, defrosting can be appropriately performed.

When the glass tube heaters 12A and 12B are turned on for defrosting of the evaporator 22, the radiant heat of the glass tube heaters 12A and 12B is likely to pass through the top members 14A and 14B compared to the case where the two top members are at the same height The space vacated between the upper and lower reaches the evaporator 22. Thus, compared with the conventional defrosting device 110, more efficient radiant heat transfer can be achieved.

In the fourth embodiment, the upward airflow heated by the glass tube heaters 12A, 12B can flow into the evaporator 22 from between the top members 14A, 14B, on the front side of the top member 14A, and on the rear side of the top member 14B. In particular, most of the gas heated by the glass tube heaters 12A, 12B easily flows into the evaporator 22 through the space vacated between the top members 14A, 14B up and down. In the fourth embodiment, heat can be transferred from the front side of the top member 14A, between the top members 14A and 14B, and from the rear side of the top member 14B, so the heat can be transferred to the entire evaporator 22.

Furthermore, during normal cooling, the gas circulating in the tank flows from the front obliquely lower side to the rear obliquely upper side and flows into the lower part of the evaporator 22. In the fourth embodiment, the pair of the glass tube heater 12A on the front side and the top member 14A on the front side is arranged low, and the pair of the glass tube heater 12B on the rear side and the top member 14B on the rear side are arranged high. Therefore this configuration corresponds to the flow. Thus, the gas circulating in the tank can flow into the evaporator 22 more smoothly.

As described above, in the fourth embodiment, the pair of the glass tube heater 12A and the top member 14A and the pair of the glass tube heater 12B and the top member 14B are arranged at different heights. Therefore, the following defrosting device 10 can be provided: Even if the top member 14A, 14B that prevents water droplets dripping from the evaporator 22 from reaching the glass tube heaters 12A, 12B is included, the heat of the glass tube heaters 12A, 12B is easily transferred to the evaporator 22, and the gas circulating in the tank can be smoothly地流到evaporator 22. Thus, by turning on the two glass tube heaters 12A, 12B, the evaporator 22 can achieve effective defrosting even if the surface temperature of the heater is not higher than 360°C.

In particular, the arrangement of the rear glass tube heater 12B and the rear top member 14B is higher than that of the front glass tube heater 12A and the front top member 14A. The flow of the circulating gas, so that the gas circulating in the tank can flow into the evaporator more smoothly. In addition, the heights of the pair of front and rear glass tube heaters 12A, 12B and the top members 14A, 14B are different, so the heat of the glass tube heaters 12A, 12B can be efficiently transferred to the evaporator 22.

The structure of the defrosting device 10 is the same as that of the first embodiment, so a more detailed description is omitted.

(Defrost device according to the fifth embodiment)

8A is a side view schematically showing a defrosting device according to a fifth embodiment of the present invention. 8B is a perspective view showing the structure of the defrosting device according to the fifth embodiment of the present invention, and is a perspective view showing the structure of the lower region of the evaporator 22 and the structure of the defrosting device 10, and FIG. 8C is a fifth view of the present invention. The side view of the structure of the defrosting device according to the embodiment is a side view of the lower region of the evaporator 22 and the defrosting device 10 viewed from the lateral direction.

The defrosting device 10 according to the fifth embodiment also includes two glass tube heaters 12A and 12B provided below the evaporator 22 and substantially parallel to the front-rear direction of the refrigerator Configuration. Further, the defrosting device 10 includes two top members 14A, 14B in a flat plate shape, which are provided above the two glass tube heaters 12A, 12B, respectively, to cover the two glasses The tube heaters 12A, 12B extend in the axial direction of the glass tube heaters 12A, 12B.

Furthermore, in the fifth embodiment, in the fifth embodiment, the pair of the glass tube heater 12A and the top member 14A and the pair of the glass tube heater 12B and the top member 14B are arranged at different heights. In more detail, the pair of the glass tube heater 12A on the front side and the top member 14A on the front side is arranged lower, and the pair of the glass tube heater 12B on the rear side and the top member 14B on the rear side is arranged higher.

Thereby, the size between the front end portion of the front top member 14A and the rear end portion of the rear top member 14b can be reduced, and even when the evaporator 22 having a small size in the front-rear direction is used, it can be appropriately Defrost.

However, the top members 14A and 14B according to the fifth embodiment are not horizontally arranged, and like the first embodiment, the top member 14A located on the front side is inclined so that the front side is higher than the back side and the lower side, and the top member 14B located on the rear side It is different from the fourth embodiment in that the front side is low and the rear side is high. As a result, the two top members 14A, 14B are arranged in an inverted “eight” shape.

The fifth embodiment can also realize the following defrosting device 10: the pair of the glass tube heater 12A and the top member 14A arranged in front and back, and the pair of the glass tube heater 12B and the top member 14B are arranged at different heights, so the glass tube heater 12A The heat of 12B can be easily transferred to the evaporator 22, and the gas circulating in the tank can smoothly flow into the evaporator 22. In addition, the two top members 14A, 14B are configured in an "eight" shape, and the convective heat of the glass tube heaters 12A, 12B can be more efficiently transferred from between the top members 14a, 14B. Thereby, heat can be more efficiently transferred to the central portion of the evaporator 22 in the front-rear direction, and therefore it is particularly effective when frost is easily applied to the central portion of the evaporator 22.

In addition, since the top members 14A and 14B are arranged obliquely, after defrosting and the water falling from the evaporator 22 flows and falls on the top member 14B on the upper side, it falls on the top member 14A on the lower side and on the top member 14A The upward flow falls and is discharged to the drainage mechanism 30 below. This prevents water from dripping onto the glass tube heaters 12A and 12B, and enables reliable drainage.

The structure of the defrosting device 10 is the same as that of the first embodiment, so a more detailed description is omitted.

(Defrost device according to the sixth embodiment)

9A is a side view schematically showing a defrosting device according to a sixth embodiment of the present invention. 9B is a perspective view showing the structure of the defrosting device according to the sixth embodiment of the present invention, which is a perspective view showing the structure of the lower region of the evaporator 22 and the structure of the defrosting device 10, and FIG. 9C is a sixth view showing the present invention. The side view of the structure of the defrosting device according to the embodiment is a side view of the lower region of the evaporator 22 and the defrosting device 10 viewed from the lateral direction.

The defrosting device 10 according to the sixth embodiment also includes two glass tube heaters 12A and 12B provided below the evaporator 22 and substantially parallel to the front-rear direction of the refrigerator To configure. Further, the defrosting device 10 includes two top members 14A, 14B in a flat plate shape, which are provided above the two glass tube heaters 12A, 12B, respectively, to cover the two glasses The tube heaters 12A, 12B extend in the axial direction of the glass tube heaters 12A, 12B.

Furthermore, as in the fourth embodiment described above, the pair of the glass tube heater 12A and the top member 14A and the pair of the glass tube heater 12B and the top member 14B are arranged at different heights. In more detail, the pair of the glass tube heater 12A on the front side and the top member 14A on the front side is arranged lower, and the pair of the glass tube heater 12B on the rear side and the top member 14B on the rear side is arranged higher.

Thereby, the size between the front end portion of the front top member 14A and the rear end portion of the rear top member 14B can be reduced, and even when the evaporator 22 having a small size in the front-rear direction is used, it can be appropriately Defrosting.

However, the top members 14A and 14B according to the fifth embodiment are not horizontally arranged, and like the second embodiment, the top member 14A located on the front side is inclined so that the front side is lower than the rear side and the top member 14B is located on the rear side This is different from the fourth embodiment in that the front side is inclined so that the front side is lowered. Thereby, the two top members 14A, 14B are arranged in an “eight” shape.

The sixth embodiment can also realize the following defrosting device 10: the pair of the glass tube heater 12A and the top member 14A arranged front and back, and the pair of the glass tube heater 12B and the top member 14B are arranged at different heights, so the glass tube heater 12A The heat of 12B is easily transferred to the evaporator 22, and the gas circulating in the tank can smoothly flow into the evaporator 22. In addition, the two top members 14A, 14B are configured in an “eight” shape, and the convective heat of the glass tube heaters 12A, 12B can be transferred from between the top members 14A, 14B. Thereby, heat can be more efficiently transferred to the central portion of the evaporator 22 in the front-rear direction, and therefore it is particularly effective when frost is easily applied to the central portion of the evaporator 22.

In addition, since the top members 14A and 14B are arranged obliquely, the defrosted water falling from the evaporator 22 flows and falls on the top members 14A and 14B to be easily discharged to the drainage mechanism 30 below.

The structure of the defrosting device 10 is the same as that of the first embodiment, so a more detailed description is omitted.

(Defrost device according to the seventh embodiment)

10A is a side view schematically showing a defrosting device according to a seventh embodiment of the present invention. 10B is a perspective view showing the structure of the defrosting device according to the seventh embodiment of the present invention, is a perspective view showing the lower region of the evaporator 22 and the structure of the defrosting device 10, FIG. 10C is a seventh view of the present invention A perspective view and a side view of the structure of the defrosting device according to the embodiment are side views of the lower region of the evaporator 22 and the defrosting device 10 viewed from the lateral direction.

The defrosting device 10 according to the seventh embodiment also includes two glass tube heaters 12A and 12B provided below the evaporator 22 and substantially parallel to the front-rear direction of the refrigerator Configuration. Further, the defrosting device 10 includes two top members 14A, 14B in a flat plate shape, which are provided above the two glass tube heaters 12A, 12B, respectively, to cover the two glasses The tube heaters 12A, 12B extend in the axial direction of the glass tube heaters 12A, 12B.

Furthermore, as in the fourth embodiment described above, the pair of the glass tube heater 12A and the top member 14A and the pair of the glass tube heater 12B and the top member 14B are arranged at different heights. In more detail, the pair of the front glass tube heater 12A and the front top member 14A is arranged lower, and the pair of the rear glass tube heater 12B and the rear top member 14B is arranged higher.

Thereby, the size between the front end portion of the front top member 14A and the rear end portion of the rear top member 14B can be reduced, and even when the evaporator 22 having a small size in the front-rear direction is used, it can be appropriately Defrosting.

However, the top members 14A and 14B according to the seventh embodiment are not horizontally arranged. As in the third embodiment, the two top members 14A and 14B are inclined so that the front side is low and the rear side is high. This is different from the fourth embodiment. The way is different.

In the seventh embodiment, the following defrosting device 10 can be realized: the pair of the glass tube heater 12A and the top member 14A arranged front and back, and the pair of the glass tube heater 12B and the top member 14B are arranged at different heights, so the glass tube heater 12A The heat of 12B is easily transferred to the evaporator 22, and the gas circulating in the tank can smoothly flow into the evaporator 22. In addition, the two top members 14A and 14B are inclined so that the front side is low and the rear side is high. During normal cooling, the gas circulating in the tank can smoothly flow into the evaporator 22, thereby realizing effective cooling. At the same time, due to the inclination of the top members 14A and 14B, the heat of the glass tube heaters 12A and 12B can be efficiently transferred to the central portion and the rear portion of the evaporator 22 in the front-rear direction. It is especially effective when the part is easy to apply frost.

In addition, since the top members 14A and 14B are arranged at an angle, defrosting and the water falling from the evaporator 22 flows on the top member 14B on the upper side and then falls onto the top member 14A on the lower side and on the top member 14A The flow falls and is discharged to the drainage mechanism 30 below. This prevents water from dripping onto the glass tube heaters 12A and 12B, and enables reliable drainage.

Although the embodiments and the embodiments of the present invention have been described, the disclosure may be changed in structural details, and combinations of elements of the embodiments and the embodiments, order changes, etc. may be made without departing from the scope and ideas of the present invention. .

Claims (10)

1. A defrosting device is characterized by comprising:

   Two glass tube heaters are provided below the evaporator of the refrigerator and are arranged parallel to the front-rear direction of the refrigerator; and

   Two top members in the shape of a flat plate are respectively provided above the two glass tube heaters, and extend along the axial direction of the glass tube heaters so as to cover the two glass tube heaters; and

   When viewed from the axial direction and viewed from the side, at least two of the top members are inclined at a predetermined angle with respect to the horizontal plane, or the pair of the glass tube heater and the top member arranged in front and rear are arranged at different heights.
2. The defrosting device according to claim 1, characterized in that

   The predetermined angle is within a range of 10 degrees or more and 40 degrees or less.
3. The defrosting device according to claim 1 or 2, wherein

   The inclination directions of the two top members are different from each other.
4. The defrosting device according to claim 1 or 2, wherein

   Both of the top members are inclined in such a manner that the front side is low and the back side is high.
5. The defrosting device according to claim 1, characterized in that

   The pair of the glass tube heater on the rear side and the top member on the rear side is arranged higher than the pair of the glass tube heater on the front side and the top member on the front side.
6. The defrosting device according to claim 5, characterized in that

   The two top members are arranged horizontally.
7. The defrosting device according to claim 5, characterized in that

   The two top members are inclined at a predetermined angle with respect to the horizontal plane, and the predetermined angle is within a range of 10 degrees or more and 40 degrees or less.
8. The defrosting device according to claim 5 or 7, wherein

   The two top members are inclined at a predetermined angle with respect to a horizontal plane, and the tilt directions of the two top members are different from each other; or both of the top members are inclined in such a manner that the front side is lower than the back side and the side is higher.
9. The defrosting device according to claim 1, characterized in that

   Side plates are connected to both sides of the top member, and the side plates are respectively formed with recesses fitted to the outer diameter of the glass tube heater.
10. The defrosting device according to claim 9, characterized in that

    The material of the top member and the side plate is metal or ceramic.

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