JPH10197121A - Automatic ice making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a smooth removal of ice in an automatic ice making machine having an ice making chamber arranged in a vertical direction. SOLUTION: An automatic ice making machine is constructed such that the back surface of an ice making chamber 1 is provided with a heat exchanger 35 for a cooling or a heating operation which may act as an evaporator having a low pressure refrigerant flowing from an upper part to a lower part within a heat exchanging pipe 35a during an ice making operation and as a heater having hot gas communicated from an upper part to a lower part within the heat exchanging pipe 35a during an ice removing operation. In this case, a heat exchanger 51 capable of heat exchanging with a lower part of the back surface of the ice making chamber 1 is arranged, and in turn during an ice removing operation hot gas is fed into a heat exchanger 35 for a cooling operation or a heating operation through the heat exchanger 51 for the heating operation so as to heat the lower part of the ice making chamber 1. The heat exchanger 51 for the heating operation is constructed such that an intermediate part of a hot gas bypass pipe 38 is arranged at the lower part of the back surface of the ice making chamber 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic ice making machine having a plurality of ice making compartments arranged in a grid on a substantially vertical surface and having an ice making compartment having a horizontal opening. is there.

[0002]

2. Description of the Related Art In a vertical ice maker as an automatic ice maker shown in FIG. 8, an ice maker 5 is arranged in a lattice shape on a substantially vertical plane.
An ice making chamber 1 in which each of the ice making chambers 5 is opened in the lateral direction, a water tray 9 having an external wall 11 for opening and closing the opening surface of the ice making chamber 1, an ice making water channel 21 formed in the water tray 9, and Pressure chamber 19, ice making water tank 6 arranged below ice making chamber 1
1. A circulation pump 67 for guiding the ice making water in the ice making water tank 61 to the pressure chamber 19 and the like.

The ice making chamber 1 has a plurality of ice making chambers 5 which are defined in a substantially square shape when viewed from the opening side by partitioning plates 3a and 3b extending in a lattice shape in the vertical and horizontal directions. Among the partition plates 3a, 3b, the horizontal partition plate 3b is inclined downward by a predetermined angle from the horizontal direction from the back side of the ice making chamber 5 toward the opening side. Thereby, during the deicing step, the ice in each ice making chamber 5 is separated by its own weight and separated from the ice storage (not shown).
It is easy to fall. On the other hand, when the water tray 9 is in the closed position, the openings of the ice making compartments 5 are collectively closed and the water tray 9 is closed.
Is provided so that one fountain port 7 is provided for one ice making chamber 5, and ice making water in an ice making water tank 61 is supplied by a circulation pump 67 to a water supply pipe 6.
9, the pressure is fed to the communication port 70 of the pressure chamber 19 located above the water tray 9, and supplied to the pressure chamber 19. Ice making waterway 2
1 is connected to the lower side surface of the pressure chamber 19 and is formed in the water tray 9 using the outer wall 11 as shown in FIG. The ice making water supplied to the pressure chamber 19 flows down the ice making channel 21, is jetted from each fountain port 7, and is supplied to each ice making small chamber 5. Also,
At the back of the ice making chamber 1, a heat exchange pipe 35 a formed to meander left and right a plurality of times from the upper part to the lower part is additionally provided to constitute a heat exchanger 35 for cooling and heating.

FIG. 9 is a sectional view taken along line XX in FIG.
FIG. 10 is a sectional view taken along the line YY in FIG. 9. In FIG. 9, two-dot chain lines 3a and 3b show a vertical partition plate and a horizontal partition plate of the ice making chamber 1, respectively.
Two return ports 71 are formed in the outer wall 11 at the same height position on the left and right of the fountain port 7 outside the ice making channel 21 for each ice making chamber 5 partitioned by the ice making chambers a and 3b. The non-iced water supplied to the small chamber 5 is returned to the return water channel 42 through these return ports 71 and returned to the ice making water tank 61 below. Further, in this prior art, as shown in FIG. 10, the ice making water channel 21 is formed by integrally forming a cylindrical body 40 and an inner wall 39 of the water tray 9. In addition, the outer wall 11
Are outer frame plates 1a, 1 extending in the vertical and horizontal directions that define the ice making chamber 1.
b, but the partition plate 3 extends in the vertical and horizontal directions.
a, 3b are shorter than the outer frame plates 1a, 1b, do not contact these partition plates 3a, 3b, and have a gap 1 between them.
0 is formed. Therefore, the ice making chambers 1 are allowed to enter and leave the ice making water from the gap 10.

FIG. 11 is a diagram showing a refrigerant piping system including a cooling / heating heat exchanger and a cooling / heating heat exchanger 35 provided at the back of the ice making chamber of the conventional vertical ice making machine. The basic circuit of the refrigerant piping system diagram includes a compressor 30, a condenser 31, a dryer 32, a capillary tube 33, a heat exchanger 35 for cooling and heating, and an accumulator 36 which are sequentially connected. Further, a hot gas bypass pipe 38 provided with a hot gas bypass valve 37 is branched from the middle of a pipe connecting the compressor 30 and the condenser 31. In addition, the heat exchange pipe 3 constituting the heat exchanger 35 for cooling and heating is used.
The capillary tube 33 and the hot gas bypass pipe 38 are connected at the inlet 35b of 5a.
In FIG. 11, reference numeral 8 denotes an air hole provided above the back surface of each ice making chamber 5.

Next, the operation of the automatic ice maker having the above configuration will be described. During the ice making operation, the ice making water in the ice making water tank 61 is supplied to the pressure chamber 19 by the circulation pump 67, flows down the ice making water channel 21, is jetted from each fountain port 7, and is supplied to the ice making small chamber 5. On the other hand, the refrigerant circuit operates, and the refrigerant gas discharged from the compressor 30 is condensed and liquefied in the condenser 31, decompressed and expanded in the capillary tube 33 through the dryer 32, and flows into the cooling / heating heat exchanger 35. .
In the heat exchanger 35 for cooling and heating, the low-pressure refrigerant evaporates under low pressure to cool the ice making chamber 1. Therefore, the ice making water becomes ice in the ice making chamber 5 and grows gradually, and ice cubes are formed. Also, folds (ice connecting portions) are formed in the gap 10 to connect the ice cubes.

When the ice making operation is continued and the ice cubes develop to a predetermined size, the ice making completion detecting means is operated, the operation of the circulation pump 67 is stopped, and the water tray 9 is rotated as shown in FIG. Then, the entire surface of the ice making chamber 1 is opened, the ice making operation ends, and the operation shifts to the deicing operation. In the deicing operation, the hot gas bypass valve 37 is opened, so that the high-temperature and high-pressure refrigerant gas (hot gas) from the compressor 30 flows into the heat exchanger 35 for cooling and heating, and the contact portion between the ice making small chamber 5 and the ice is formed. Melt the ice,
The ice is de-iced along the inclined surface of the horizontal partition plate 3b and stored in a lower ice storage (not shown). When the temperature of the ice making chamber 1 rises due to deicing, a deicing thermostat (not shown) operates, the hot gas bypass valve 37 is closed, and the water tray 9 is moved to the state shown in FIG.
Then, the operation of the circulation pump 67 is restarted, whereby the deicing operation is completed and the ice making operation is restarted. As the ice making operation and the de-icing operation are repeated, the amount of ice in the ice storage increases, and when the ice reaches a predetermined amount, an ice storage switch (not shown) detects full ice, and the operation of the ice making machine is stopped until the ice storage switch drops to the predetermined amount. Is done.

[0008]

However, in the conventional automatic ice making machine, during deicing operation, hot gas discharged from the compressor 30 is supplied to the heat exchanger 3 for cooling and heating at the back of the ice making chamber 1.
5, the ice making chamber 1 was sequentially heated from the upper part to the lower part. Further, since the temperature of the hot gas becomes higher on the inlet side of the cooling / heating heat exchanger 35, the amount of heating of the ice making chamber 1 in the upper part and the lower part is remarkably different, and the amount is larger in the upper part.

For this reason, the ice in the ice making compartment 5 starts to melt from the upper ice, but when the lower ice melts, the upper ice melts too much and the ice is originally defrosted at once by itself. As shown in FIG. 12, the folds (ice connection portions) 28 formed at the upper portion are melted at the upper portion, and the separated ice cubes at the upper portion may not be deiced because of their light weight. In the case where the folds 28 are melted at the upper part and only the folds 28 at the lower part are held, since the weight of the ice to be connected is light, and when the lower part starts to melt, the time since the ice starts to melt is short. The ice in the ice making compartment 5 is close to the ice making compartment 5.
There was a problem that it was difficult to de-ice even if there were small projections or slight deformation inside. As described above, if deicing cannot be performed smoothly, the ice becomes lighter, the amount of ice making decreases, and electricity and water are wasted. Further, since the ice is deformed, the commercial value of the ice is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and has been made in order to facilitate deicing in an automatic ice making machine having an ice making chamber arranged vertically. It is intended to be performed.

[0011]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, there is provided a horizontal partition plate which is juxtaposed at regular intervals in a vertical direction and whose tip end is inclined downward. And an ice making room having a plurality of ice making compartments formed by a plurality of vertical dividing plates arranged side by side at right angles to the horizontal partition plate, and a heat exchange pipe on the back of the ice making room, from top to bottom. During the ice making operation, the low-pressure refrigerant flows from the upper part to the lower part in the heat exchange pipe to act as an evaporator, and the hot gas flows from the upper part to the lower part in the heat exchange pipe during the deicing operation. A cooling and heating heat exchanger that acts as a heater through circulation, and in the ice making operation, ice making water flowing into the ice making small room is cooled by the cooling and heating heat exchanger to produce ice in the ice making small room; During the deicing operation, the ice in the ice making room is cooled as described above. 2. Description of the Related Art In an automatic ice making machine that removes ice from an ice making chamber by heating with a heating heat exchanger, a heating heat exchanger that can exchange heat with the lower part of the back is provided at the back of the ice making room, and deicing operation is performed. Sometimes, hot gas is introduced into the heat exchanger for cooling and heating via the heat exchanger for heating.

According to the second aspect of the present invention, in the heating heat exchanger, a middle part of a hot gas bypass pipe for flowing hot gas from a compressor is horizontally attached to a lower portion of the back of the ice making chamber. It is configured.

According to the third aspect of the present invention, in the heating heat exchanger, a middle part of a hot gas bypass pipe through which hot gas from a compressor flows is a rear side of a horizontal part below the heat exchange pipe. It is configured to be attached to

According to a fourth aspect of the present invention, in the heat exchanger for heating, one straight pipe having one end closed is disposed between the meandering horizontal portions below the heat exchange pipe. At the other end, a hot gas bypass pipe for flowing hot gas from the compressor is divided and inserted into the inlet side and the outlet side and connected to each other, and one of the divided hot gas bypass pipes is It is configured to be inserted to the vicinity of the closed one end side.

[0015] In the invention according to claim 5, the heating heat exchanger is such that a middle part of a hot gas bypass pipe for flowing hot gas from a compressor is attached to a lower rear portion of the ice making chamber, Another part is orthogonally attached from the lower part to the upper part on the back side of the heat exchange pipe.

In the automatic ice making machine according to the first aspect of the present invention, during the ice making operation, a low-pressure liquid is supplied from the upper part to the lower part of the cooling / heating heat exchanger in which the heat exchange pipes meander left and right. The gas mixture refrigerant is circulated, but in the direction of circulation, the liquid refrigerant flows smoothly in the heat exchanger, so that an efficient ice making operation is performed, and the refrigerating machine oil stays in the cooling / heating heat exchanger. Since it is not necessary, there is an advantage that the filling amount of the refrigerating machine oil can be reduced, which is considered to be rational. On the other hand, during deicing operation, hot gas from the compressor enters the heating heat exchanger provided at the lower part of the back of the ice making room, heats the lower part of the ice making room, rises to the upper part, and cools down. As it flows into the inlet of the heat exchanger for heating, it is heated by the heat exchanger for cooling and heating from the upper ice making chamber, and the lower ice making chamber is further heated. The inconvenience of deicing, such as melting of the ice first, is eliminated.

In the automatic ice maker according to the second aspect, the middle part of the hot gas bypass pipe is attached to the lower part of the back of the ice making chamber, so that the configuration of the heating heat exchanger is simplified. Cost is reduced.

In the automatic ice making machine according to the third aspect, the middle part of the hot gas bypass pipe is structured to be attached to the back side of the heat exchange pipe of the heat exchanger for cooling and heating. The heat exchanger for heating can be configured in a plane by the intermediate portion of, and the structure of the heat exchanger for heating is further simplified.

In the automatic ice making machine according to the fourth aspect, the heat exchanger for heating is constituted by one straight pipe, and one end of the straight pipe is provided with an inlet side and an outlet side of the hot gas bypass pipe. Because of the connection, the heating heat exchanger can be easily accommodated in the back of the ice making room, which can contribute to the miniaturization of the ice making machine.

In the automatic ice making machine according to the fifth aspect, since the heating of the ice making room by the hot gas as the heat exchanger for heating is performed from the lower part and the lower part to the upper part, it is more uniform.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a vertical ice maker as an automatic ice maker will be described below with reference to FIGS. 1 to 7, but will be described with reference to FIGS. It differs from the conventional automatic ice making machine only in that a heat exchanger for heating is provided on the back of the ice making room. This difference will be described in detail. The same or corresponding parts as those in the technology are denoted by the same reference numerals as those in FIGS. First, FIG.
The first embodiment will be described with reference to FIG. FIG.
At the back of the ice making room 1, a heat exchanger 3 for cooling and heating is provided.
5 and the horizontal heat exchange pipe 35a at the bottom
An intermediate part of the hot gas bypass pipe 38 is provided in the horizontal direction between the horizontal heat exchange pipe 35a of the stage and this part is configured as a heat exchanger 51 for heating. The left end of the heat exchanger for heating 51 rises obliquely upward, and is connected to the inlet of the upper right end of the heat exchanger for cooling and heating 35 by being inserted together with the capillary tube 33. At the inlet of the cooling / heating heat exchanger 35, a hot gas bypass pipe 38 is inserted to the vicinity of the left curved portion. Although this is a measure for setting the temperature lower, it is adopted in relation to the ice melting balance of the entire ice making room. The position of the heating heat exchanger 51 is adjusted so that the air hole 8 provided on the back surface of the ice making chamber 1 is not blocked by the addition of the heating heat exchanger 51. Hole 8
Is selected in a location that avoids

With the above-described structure, during the ice making operation, the low-pressure liquid-gas mixing is performed from the upper part to the lower part of the cooling / heating heat exchanger 35 in which the heat exchange pipes 35a meander left and right. The refrigerant is circulated.
Since the liquid refrigerant flows smoothly in the heat exchanger 35 for cooling and heating, an efficient ice making operation is performed, and there is no possibility that the refrigerating machine oil stays in the heat exchanger 35 for cooling and heating. Therefore, there is an advantage that the filling amount of the refrigerating machine oil can be reduced, which is considered to be rational. On the other hand, during the deicing operation, the ice making small chambers 5 are sequentially heated from the upper part to the lower part by the cooling and heating heat exchanger 35 attached to the back of the ice making chamber 1, and the heating heat exchanger 51 is used. Since the lower ice making compartment 5 is heated faster and more strongly, the melting ice balance is improved,
As shown in FIG. 2, ice cubes formed in the respective ice making compartments 5 are deiced and dropped from the ice making compartments 5 integrally in a state where they are connected by folds (ice connecting portions) 28. Therefore, ice with a more uniform shape than before can be obtained. Further, unlike the conventional case, the upper ice is not melted and wasted, so that the ice making efficiency is improved and the ice making capacity is improved as compared with the conventional case. In addition, the ice cubes are connected by folds, and even if there are small deformations or protrusions in the ice making chamber 5, deicing can be performed relatively smoothly. In addition, such deicing does not require a complicated mechanism for mechanically pushing out the ice formed in the ice making compartment, and only a part of the middle of the hot gas bypass pipe 38 is attached to the back of the ice making compartment 1. Therefore, there is no fear of failure and the cost can be reduced.

FIGS. 3 to 7 show the second to sixth embodiments, which are different from the first embodiment only in the configuration of the heating heat exchanger. Hereinafter, these embodiments will be described focusing on the differences from the first embodiment. First, a second embodiment will be described with reference to FIG. In FIG. 3, air holes 8
A middle part of the hot gas bypass pipe 38 is attached so as to avoid the heat.
Is configured as The left end of the heat exchanger 3 is started up in the same manner as in the first embodiment and is started up.
5 is connected to the entrance 35b. Therefore, as compared with the first embodiment, the position of the intermediate portion of the hot gas bypass pipe 38 attached to the back of the ice making chamber 1 is lower than the lowermost horizontal pipe of the heat exchanger 35 for cooling and heating. This is different from the first embodiment in that it is performed. By doing so, the lowermost part of the ice making chamber 1 can be heated, but it is basically the same as the first embodiment.

Next, FIG. 4 shows a third embodiment, in which a middle part of a hot gas bypass pipe 38 is meandered once in the horizontal direction at the lower rear portion of the ice making chamber 1, and is attached as two stages. This portion is formed as a heat exchanger 53 for heating. The right end is connected to the inlet 35b of the heat exchanger 35 for cooling and heating. By increasing the heat exchange area of the heating unit in this way, the ice making chamber 1
The lower portion of the first embodiment can be heated more quickly, but is basically the same as the first embodiment.

FIG. 5 shows a fourth embodiment in which a middle part of a hot gas bypass pipe 38 is formed in a lower portion of the back of the ice making chamber 1 along a heat exchange pipe 35a below a heat exchanger 35 for cooling and heating. This is meandered once in the horizontal direction to form two stages, which are attached to the back side of the heat exchange pipe 35a, and this portion is formed as a heat exchanger 54 for heating. Also,
The right end thereof is connected to an inlet 35b of the heat exchanger 35 for cooling and heating. By doing so, the heating heat exchanger 54 is formed in two stages, but can be configured to be bent in a plane at an intermediate portion of the hot gas bypass pipe 38, and the structure can be simplified. it can.

FIG. 6 shows a fifth embodiment in which a single straight pipe 155 having one end 155a closed at the lower rear portion of the ice making chamber 1 is provided with a heat exchange pipe 35a at a lower portion of the heat exchanger 35 for cooling and heating. The straight pipe 155
A hot gas bypass pipe 38 is divided into an inlet side portion 38a and an outlet side portion 38b and connected to the other end 155b. The inlet side portion 38a is a closed end (the one end) 1
It is inserted and opened to the vicinity of 55a. In this embodiment, the heating heat exchanger 55 is configured as described above. By doing so, the hot gas flows from the closed end 155a side to the other end 155b side in the straight pipe 155 of the heating heat exchanger 55. A straight pipe 155 is attached to the back of the ice making chamber 1, and the inlet side 38 a and the outlet side 38 b of the hot gas bypass pipe 38 are connected to one end of the straight pipe 155 (the other end). Edge) 1
Since it is connected to 55b, the pipe can be accommodated well, which can contribute to downsizing of the ice making machine. In the above embodiment, the inlet side portion 38a of the hot gas bypass pipe 38 is extended to the vicinity of the closed end 155a of the straight pipe 155. Instead, the outlet side part 38b of the hot gas bypass pipe 38 is closed. It may be extended to the vicinity of 155a to shorten the insertion length of the inlet side portion 38a.

FIG. 7 shows a sixth embodiment in which a middle portion 56a of a hot gas bypass pipe 38 is attached to a lower rear portion of the ice making chamber 1 at a lower rear portion of the ice making chamber 1 and a lower portion 56a of the hot gas bypass pipe 38 is provided. The heating heat exchanger 56 is formed by adding another portion 56b that follows the heat exchanger pipe 35a of the cooling / heating heat exchanger 35 from the lower side to the upper side at right angles. The heating heat exchanger 56 is connected from the upper end to the inlet 35b of the cooling / heating heat exchanger 35, and the capillary tube 33 is connected at the inlet 35b.
Connected with. By doing this,
With the cooling and heating heat exchanger 35 heating the ice making chamber 1, the lower part of the ice making chamber 1 is directly and strongly heated by the hot gas before entering the cooling and heating heat exchanger 35.
Is the heat exchange pipe 35 of the heat exchanger 35 for cooling and heating.
a, the entire ice making chamber 1 is relatively uniformly heated.

Each of the above embodiments is directed to a vertical ice making machine as an automatic ice making machine of a spray cell type for injecting ice making water into each ice making small chamber. The present invention can also be applied to an automatic ice maker of a falling cell system in which the liquid flows down.

[0029]

As described above, the present invention has the following advantages. According to the first aspect of the present invention, during the deicing operation, hot gas before entering the cooling / heating heat exchanger is introduced into the heating heat exchanger, and the heating heat exchanger causes the lower rear portion of the ice making chamber to be introduced. Since the heat is applied as if heated, the ice-melting balance is improved, and the ice is smoothly de-iced and dropped from the ice-making room while being connected with the folds. As a result, well-shaped ice is obtained, and the ice making capacity is improved. Also, since no mechanically complicated mechanism is required, there is no need to worry about a failure and the cost can be reduced.

According to the second aspect of the present invention, since the heating heat exchanger only has a middle part of the hot gas bypass pipe attached to the lower part of the back of the ice making chamber, the structure is simplified and the cost is reduced. Reduced.

According to the third aspect of the present invention, the heating heat exchanger has a middle part of the hot gas bypass pipe attached to the back side of the heat exchange pipe of the cooling and heating heat exchanger. A planar structure is further simplified.

According to the fourth aspect of the present invention, since the heating heat exchanger is constituted by one straight pipe, the heating heat exchanger can be easily accommodated in the back of the ice making room, and the size of the ice making machine can be reduced. It can contribute to the conversion.

According to the fifth aspect of the present invention, the heating of the ice making chamber is performed from the lower part and from the lower part to the upper part, so that the heating is more uniform.

[Brief description of the drawings]

FIG. 1 is a diagram showing a cooling / heating heat exchanger and a refrigerant piping system diagram as viewed from the back of an ice making room in a vertical ice making machine according to a first embodiment.

FIG. 2 is a view illustrating a state in which ice is separated from the ice making chamber of FIG. 1;

FIG. 3 is a drawing showing a cooling / heating heat exchanger and a refrigerant piping system diagram as viewed from the back of an ice making room in a vertical ice machine according to a second embodiment.

FIG. 4 is a diagram showing a cooling / heating heat exchanger and a refrigerant piping system diagram as viewed from the back of an ice making room in a vertical ice maker according to a third embodiment.

FIG. 5 is a diagram showing a cooling / heating heat exchanger and a refrigerant piping system diagram as viewed from the back of an ice making room in a vertical ice machine according to a fourth embodiment.

FIG. 6 is a drawing showing a cooling / heating heat exchanger and a refrigerant piping system diagram as viewed from the back of an ice making room in a vertical ice maker of a fifth embodiment.

FIG. 7 is a drawing showing a cooling / heating heat exchanger and a refrigerant piping system diagram as viewed from the back of an ice making room in a vertical ice maker according to a sixth embodiment.

FIG. 8 is an overall configuration diagram of an automatic ice maker of a conventional injection cell type in an ice making state.

FIG. 9 is a sectional view taken along line XX in FIG. 8;

FIG. 10 is a sectional view taken along line YY in FIG. 9;

FIG. 11 is a drawing showing a heat exchanger for cooling and heating and a refrigerant piping system diagram of the automatic ice making machine.

FIG. 12 is an overall configuration diagram of a conventional automatic ice maker of the injection cell type in a de-icing state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ice making room, 3a ... Vertical partition plate, 3b ... Horizontal partition plate, 5 ... Ice making small room, 8 ... Air hole, 9 ... Water tray, 21 ... Ice making channel, 28
... folds, 35 ... heat exchanger for cooling and heating, 35a ... heat exchange pipe, 35b ... entrance of heat exchange pipe, 38 ... hot gas bypass pipe, 38a ... entrance side of hot gas bypass pipe, 38b ... hot gas bypass Outlet side of the tube, 51,
52, 53, 54, 55, 56 ... heat exchanger for heating, 56
a: middle part of the hot gas bypass pipe, 56b: other part of the middle of the hot gas bypass pipe, 61: ice making water tank, 67: circulation pump, 155: straight pipe, 155a ...
One end of the straight pipe, 155b ... The other end of the straight pipe.

Claims (5)

[Claims] 1. A horizontal partition plate which is juxtaposed at a predetermined interval in a vertical direction and whose tip is inclined downward, and a plurality of vertical partition plates juxtaposed orthogonally to the horizontal partition plate. An ice making chamber having a plurality of formed ice making chambers, and a heat exchange pipe is provided on the back of the ice making chamber in a meandering manner from the upper part to the lower part, and a low-pressure refrigerant flows upward in the heat exchange pipe during an ice making operation. And a cooling / heating heat exchanger in which the hot gas flows from the upper part to the lower part in the heat exchange pipe and acts as a heater during the deicing operation. The ice making water flowing into the ice making compartment is cooled by the cooling and heating heat exchanger to generate ice in the ice making compartment, and the ice in the ice making compartment is heated by the cooling and heating heat exchanger during deicing operation. Ice machine that removes ice from the ice making compartment A heating heat exchanger capable of exchanging heat with the lower part of the rear surface is provided on the back of the ice making room, and hot water is supplied to the cooling / heating heat exchanger via the heating heat exchanger during deicing operation. An automatic ice maker characterized by introducing gas. 2. The heating heat exchanger according to claim 1, wherein a middle part of a hot gas bypass pipe for flowing hot gas from a compressor is horizontally attached to a lower part of a back surface of the ice making chamber. The automatic ice maker according to claim 1, characterized in that: 3. The heating heat exchanger has a configuration in which a middle part of a hot gas bypass pipe through which hot gas from a compressor flows is attached to a back side of a horizontal portion below a heat exchange pipe. 2. The method according to claim 1, wherein
Automatic ice maker as described. 4. The heating heat exchanger, wherein one straight pipe whose one end is closed is disposed between the meandering horizontal portions below the heat exchange pipe, and the other end of the straight pipe is compressed. A hot gas bypass pipe for flowing hot gas from the machine is inserted and connected to the inlet side and the outlet side, respectively, and connected,
2. The automatic ice making machine according to claim 1, wherein one of the divided hot gas bypass pipes is inserted into the vicinity of the closed one end side. 5. The heating heat exchanger has a middle part of a hot gas bypass pipe for flowing hot gas from a compressor attached to a lower portion of the back of the ice making chamber, and another part of the hot gas bypass pipe has a lower part. 2. The automatic ice making machine according to claim 1, wherein the replacement pipe is provided so as to be orthogonally attached from the lower part to the upper part on the back side.