JP5694697B2 - Cooling system - Google Patents

Description

  The present invention relates to a cooling device used in a large cooling storage for storing fish, meat, and the like, and more particularly, to a cooling device that solves a problem caused by defrost water coming into contact with a defrost heater.

  FIG. 5 is a cross-sectional view showing an example of a conventional cooling device. In this cooling device, a cooling coil 103 (evaporator) and a fan 104 are accommodated in a cooling chamber 102 provided in a ceiling portion of the storage body 101, and the fan 104 is driven to be sucked from a suction port 105. The inside air passes through the cooling coil 103 to generate cold air, which is blown into the compartment from the air outlet 106, and the fan 104 is driven and stopped based on the inside temperature detected by a thermostat (not shown). By being repeated alternately, the interior is cooled to a substantially set temperature.

  On the other hand, in order to maintain the cooling capacity of the cooling coil 103, the cooling coil 103 is appropriately defrosted. Specifically, defrosting is performed by energizing a plurality of heaters 107 disposed in the cooling coil 103 at intervals in the vertical direction to generate heat, and the defrost water W generated thereby is dropped onto the drain pan 108 and drained. It is discharged from the mouth 109 to the outside.

JP 2003-148857 A

  In the conventional cooling device, the defrost water W generated by the heater 107 disposed above the cooling coil 103 evaporates in contact with the heater 107 disposed below, and the high-temperature steam generated thereby is evaporated. There was a problem that it was blown into the chamber and frosted in the chamber.

  The present invention has been made in view of the problems in the above-described conventional cooling device, and an object of the present invention is to provide a cooling device that solves a problem caused by defrost water coming into contact with a defrost heater. .

In order to achieve the above object, the present invention is installed in a cooling storage room, cools the air in the room sucked from the suction port with a cooling coil, and blows out the generated cold air from the outlet into the room. A cooling device in which the cooling coil is defrosted by a plurality of heaters arranged at intervals in the vertical direction in the coil, and the inside of the cooling coil is divided into a plurality of divided regions stacked in the vertical direction. A partition member that divides and guides the defrosted water dripped on the upper surface thereof toward the air suction surface side of the cooling coil and flows down in a state of being in contact with an edge of the cooling coil on the air suction surface side; Each of the divided areas is provided with a control device that executes defrosting based on the temperature in each area.

  According to the present invention, the defrost water generated by the heater drops on the upper surface of the partition member disposed below the heater, so that steam is generated in contact with the heater disposed below the partition member. Can be prevented. In addition, since the heat generated by the heater does not escape upward from the partition member disposed above, the defrost efficiency is improved, and a heater having a temperature lower than that of the conventional one can be adopted, thereby reducing power consumption. At the same time, even if the defrost water contacts the heater, it is difficult for steam to be generated. Therefore, the amount of frost formation in a store | warehouse | chamber can be reduced.

In addition, because the partition member is configured to guide the defrost water dripping on the upper surface thereof toward the air suction surface side of the cooling coil and to flow down in a state of being in contact with the edge on the air suction surface side of the cooling coil , The defrosting water has a secondary defrosting effect of melting frost adhering to the air suction surface side of the cooling coil, and the defrosting time can be shortened.

Also, since provided a control device for executing the defrosting based on the temperature of each divided within each region for each region, Ki out to perform the defrost in accordance with the frost formation amount of each divided area, shortening and energy saving defrost time Can be achieved.

It is a front view of the cooling device which is one embodiment of the present invention. It is a partially broken left view of the cooling device of FIG. It is a fragmentary sectional view which shows typically the structure of the cooling coil of the cooling device of FIG. It is a fragmentary perspective view which shows typically the structure of the cooling coil of the cooling device of FIG. It is sectional drawing of the conventional cooling device.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. 1 to 4 show a cooling device according to an embodiment of the present invention. The said cooling device is installed in the prefabricated storage etc. which refrigerate meat, fish, etc.

  As shown in FIG. 1, the cooling device 1 includes a horizontally long casing 2 having a pair of air outlets 2a on the front side. As shown in FIG. 2, a horizontally long cooling coil 3 (evaporator) is disposed on the inner back side of the housing 2, and this cooling coil 3 is not shown, but is connected to a compressor and a condenser via a pipe. And it connects with an expansion valve etc. cyclically, and constitutes a refrigerating cycle.

  As shown in FIG. 3, the cooling coil 3 is provided between a plurality of refrigerant tubes 4 (shown by white circles) arranged in a staggered pattern at intervals in the vertical direction and these refrigerant tubes 4 (see FIG. 3). A plurality of cord-shaped heaters 5 (shown by black circles) arranged at intervals in the vertical direction, and arranged at intervals in the horizontal direction and connected to the refrigerant pipe 4 as shown in FIG. The plurality of heat dissipating fins 6 and a pair of partition members 7 disposed in parallel in the vertical direction are provided.

The partition member 7 is formed by, for example, pressing a metal plate, and both front and rear end portions thereof are bent downward at a substantially right angle. The cooling coil 3 is installed in a state of being inclined toward the suction port (not shown) side of the housing 2, and the angle α formed by the air suction surface 3a with the horizontal plane is about 87 to 88 °, The upper surface of the partition member 7 is inclined downward toward the air suction surface 3a. By the partition member 7, the inside of the cooling coil 3 is partitioned into a plurality of divided regions R _{1 to} R ₃ that are stacked in the vertical direction.

  As shown in FIG. 2, a drain pan 8 is installed below the cooling coil 3, and water generated during the defrost operation is dropped onto the drain pan 8 and discharged to the outside from the drain port 8 a.

  Fans 9 are disposed on the inner front side of the housing 2 so as to face the air outlets 2a. Further, a lattice-like cover 10 is attached to each of the air outlets 2 a on the outer front side of the housing 2.

  When the fan 9 is driven, as indicated by an arrow in FIG. 2, the outside air sucked into the housing 2 from the suction port passes through the cooling coil 3 and is exhausted to the outside from the air outlet 2 a of the housing 2. When the outside air passes through the cooling coil 3, it exchanges heat with the refrigerant tubes 4 and the fins 6 and becomes cold air.

When the amount of frost on the cooling coil 3 increases, the cooling efficiency decreases, and thus the heater 5 is energized as appropriate to perform defrosting. At this time, the defrost water generated in the lowermost divided region R ₃ is directly dropped onto the drain pan 8, but the defrost water generated in the uppermost divided region R ₁ and the middle divided region R ₂ is once dropped on the upper surface of the partition member 7. To do. As shown in FIGS. 3 and 4, the defrost water W flows along the upper surface of the partition member 7 toward the air suction surface 3a, flows downward from the rear end side of the partition member 7, and flows along the air suction surface 3a. It flows down and is dropped on the drain pan 8.

As described above, since the defrost water generated in the divided regions R ₁ and R ₂ is not dripped into the lower divided region, the amount of steam generated when the defrost water contacts the heater 5 is reduced. It is possible to reduce the amount of frost on the inside.

Further, since the heat generated in each heater 5 does not escape upward from the partition member 7 positioned above, the defrost efficiency is improved as compared with the conventional case, and the surface temperature of the heater 5 can be lowered. Conventionally, a heater is selected with a watt density of 1.0 W / cm ² , and the heater surface temperature has reached 300 ° C. or higher. In the present invention, the watt density is set to about 0.1 to 0.2 W / cm ² . The heater surface temperature is about 60 to 100 ° C.

  Conventionally, since the surface temperature of the heater was high, a large amount of heat unnecessary for the defrost was released into the cabinet, but in the present invention, the surface temperature of the heater 5 can be set to the minimum temperature necessary for the defrost. The power consumption is reduced and the heater 5 has a longer life. Moreover, since defrost water is hard to evaporate even if it contacts the heater 5, it is hard to produce frost.

  Further, by reducing the watt density, it is possible to increase the number of heaters 5 and spread the heat uniformly over the entire cooling coil 3, so that efficient defrosting is possible. Note that even if the number of heaters 5 increases, the power consumption of each heater 5 is small. Therefore, considering the running cost, the cost can be reduced compared to the conventional case.

  The heater 5 is formed by connecting a plurality of heaters in series (for example, in the case of a 200V heater, connecting three 67V heaters in series), the lead wire can be simplified, and the terminal block The time required for the connection work can be shortened.

Further, in the present embodiment, as shown in FIG. 2, the thermostat 11 to perform defrosting and ON / OFF of the heater 5 based on the temperature of each divided region in each divided region R1~R3 provided. In this case, since defrosting can be performed according to the amount of frost formation in each of the divided regions R1 to R3, the defrosting time can be shortened and energy can be saved.

Furthermore, in this embodiment, as shown in FIG. 3, when the defrost water generated in the divided regions R ₁ and R ₂ flows down along the air suction surface 3a of the cooling coil 3, the frost F attached to the air suction surface 3a side. The secondary defrosting effect is melted. The cooling coil 3 is most effective in reducing the defrost time because it is most likely to form frost on the air suction surface 3a.

  In the above embodiment, the number of partition members 7 is two, but the number of partition members 7 is not particularly limited.

  In addition, various modifications can be made to the above-described embodiment without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Cooling device 3 Cooling coil 5 Heater 7 Partition member 11 Thermostat (control device)
R ₁ to R ₃ divided area

Claims (1)

It is installed in the cooling storage room, the inside air sucked from the suction port is cooled by the cooling coil, and the generated cold air is blown out from the outlet to the inside of the warehouse, and is arranged in the cooling coil at intervals in the vertical direction. A cooling device configured to defrost the cooling coil with a plurality of heaters provided;
The inside of the cooling coil is divided into a plurality of divided regions stacked in the vertical direction, and defrosted water dripping on the upper surface thereof is guided toward the air suction surface side of the cooling coil and the air suction surface side of the cooling coil A partition member that flows down in contact with the edges of the
A cooling device, comprising: a control device that performs defrosting for each of the divided regions based on a temperature in each region.

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