JPH0618882U - Refrigeration unit - Google Patents

Abstract

(57) [Summary] [Purpose] The diameter of the propeller fan 53 is reduced by reducing the pressure loss when the cooling air flows through the condenser duct 55, and the power consumption of the motor 54 is reduced. [Structure] Capacitor installation part 55 of capacitor duct 55
A chamfer or a smooth curved surface 56 is formed in the air guide portion from a to the fan installation portion 55b.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a refrigeration unit suitable for containers.

[0002]

[Prior art]

 A conventional container is shown in FIG. The container 1 has a rectangular parallelepiped shape, and a refrigeration unit 100 is attached to one end wall 2 of the container 1. By storing the cargo in the container 1 through a door (not shown) provided on the other end wall of the container 1 and operating the refrigeration unit 100, the air temperature inside the container 1 is kept within the range of -25 ° C to + 25 ° C. The container 1 is carried on a ship, truck, railroad vehicle, etc. while being maintained at a temperature arbitrarily set by.

A schematic configuration of the refrigeration unit 100 is shown in FIG. 4, where (A) is a front view, (B) is a vertical sectional view taken along the line BB of (A), and (C) is (B). It is a cross-sectional view taken along the line CC in FIG. The gas refrigerant discharged from the compressor 3 enters the water cooling condenser 5 or the air cooling condenser 4 and is condensed and liquefied there. The liquid refrigerant enters the electronic expansion valve 9 via the dryer 7 and the strainer 8 and is throttled there to undergo adiabatic expansion to become a gas-liquid two-phase refrigerant. This refrigerant enters the evaporator 10 and evaporates and evaporates by cooling the internal air blown from the evaporator fan 12 driven by the motor 11. Then, this gas refrigerant returns to the compressor 3 via the accumulator 13.

After the air inside the container 1 enters the evaporator section 15 through the suction port 14 and is urged by the evaporator fan 12 as shown by the solid arrow, and is cooled in the process of passing through the evaporator 10. After returning to the inside of the container 1 through the air passage 16 and the blowing chamber 18, the air is blown out from the gaps of the many T-rails 43.

When the air-cooled condenser 4 is used, the motor 54 drives the condenser fan 6. As a result, the outside air enters the condenser duct 55 provided in the condenser section 42 as shown by the dashed arrow, and heats up by exchanging heat with the gas cooling medium in the process of passing through the air-cooling condenser 4, and then the condenser cools. It is urged by Juan 53 and released.

When the water-cooled condenser 5 is used, a water supply pipe and a drain pipe (not shown) are connected to the cooling water inlet 19 and the cooling water outlet 20 to open the water control valve 21. Then, the cooling water supplied from the water supply pipe enters the water cooling condenser 5 from the cooling water inlet 19 through the water pipe (not shown), and is heated there by exchanging heat with the gas refrigerant. The water is discharged from the cooling water outlet 20 through the water control valve 21 and the drain pipe.

The drain condensed on the evaporator 10 drops on the drain pan 22 and is discharged from the drain port 24 via the drain hose 23.

Reference numeral 41 denotes a partition wall made of a heat insulating material, which is fastened to the end wall 2 of the container 1 by a flange formed all around the partition wall. A condenser section 42 is formed on the outside of the partition wall 41 at the center of the lower portion thereof, an evaporator section 15 is provided above the condenser section 42, an air passage 16 is provided on both sides of the interior of the partition wall 41, and a condenser section 42 is provided below. Each of the blowout chambers 18 is formed. An evaporator 10, an evaporator fan 12 and the like are installed in the evaporator section 15. Inside the condenser section 42, a compressor 3, an accumulator 13, a water-cooled condenser 5, a condenser duct 55, etc. are installed.

In addition, 25 is a control box, 26 is a solenoid valve for liquid injection for cooling by injecting a liquid refrigerant into the compressor 3, 27 is a 200V class power plug, 28 is a 400V class power plug, and 29 is a A power transformer, 31 is an intake air temperature sensor for detecting the temperature of the air in the refrigerator that is sucked into the evaporator 10, 30 is an insertion port of a thermometer for checking the temperature sensor 31, and 33 is the air blown out from the evaporator 10. An outlet air temperature sensor for detecting the temperature, 32 is an inlet for a thermometer for checking the temperature sensor 33, 34 is an outlet temperature sensor for detecting the refrigerant outlet temperature of the evaporator 10, 35 is an overheat prevention sensor, 36 Is a discharge pipe temperature sensor for detecting the temperature of the discharge pipe of the compressor 3, 37 is an outside air temperature sensor for detecting the temperature of the outside air flowing into the air-cooling condenser 4, and 38 Is an inspection lid for inspecting the equipment in the evaporator section 15, 39 is a handle used for attaching and detaching the inspection lid 38, and 40 is a ventilation device.

As shown in FIG. 2, the capacitor duct 55 is composed of a box-shaped capacitor installation portion 55a and a fan installation portion 55b provided at a central portion thereof so as to project upward. The condenser 4 is installed in the condenser installation part 55a, and the propeller fan 53 is installed in the fan installation part 55b to rotate around a horizontal rotary shaft 53a and blow the cooling air forward.

[0011]

[Problems to be solved by the device]

 In the above-mentioned conventional refrigeration unit, since the air guide part 55c that guides the cooling air that has passed through the left and right sides of the condenser 4 from the condenser installation part 55a to the fan installation part 55b has a right angle, the air flow is generated by this air guide part 55c. As a result of being narrowed down, it receives great resistance. In addition, the cooling air that has flowed into the fan installation portion 55b gradually changes its direction on the suction side of the propeller fan 53 and becomes horizontal and is sucked into the propeller fan 53, so in this process it is choked by the rear surface 55d of the fan installation portion 55b. Suffers a great deal of resistance. Therefore, since the pressure loss when the cooling air flows through the condenser duct 55 is large, the diameter of the propeller fan 53 must be increased and the capacity of the motor 54 must be increased, and the power consumption of the motor 54 is large. there were.

[0012]

[Means for Solving the Problems]

 The present invention has been proposed to solve the above problems, and its gist is to provide a box-shaped capacitor installation part in a capacitor section through which the outside air circulates, and to provide a box-shaped capacitor installation part that projects upward at approximately the center part. A condenser duct consisting of a fan installation part is installed, a capacitor is installed in the capacitor installation part, and a propeller fan that blows cooling air forward by rotating around a horizontal rotation axis is installed in the fan installation part. The refrigeration unit is characterized in that a chamfer or a smooth curved surface is formed in the air guide part from the condenser installation part of the condenser duct to the fan installation part.

A recess protruding rearward can be formed on the suction side of the fan in the fan installation portion of the condenser duct.

[0014]

[Action]

 In the present invention, when the propeller fan is driven, the cooling air enters the condenser duct, passes through the condenser, and then smoothly flows from the condenser installation portion to the fan installation portion, and smoothly flows on the fan suction side of the fan installation portion. It changes its direction of flow and becomes horizontal, and is sucked into the propeller Juan, and is propelled by the propeller Juan and blown forward.

[0015]

【Example】

 One embodiment of the present invention is shown in FIG. As shown in Fig. 1 (A), the air guide part from the condenser installation part 55a of the condenser duct 55 to the fan installation part 55b, that is, the top plate 55e of the capacitor installation part 55a and the side plate 55f of the fan installation part 55b. A chamfer 56 is formed between them. Instead of chamfering 56, a smooth curved surface may be formed.

A recess 57 that projects rearward is formed on the rear surface 55d of the fan installation portion 55b on the fan suction side. Other configurations are similar to those of the conventional one shown in FIGS. 2 to 4, and corresponding members are designated by the same reference numerals.

Therefore, the cooling air that has passed through the left and right sides of the condenser 4 is smoothly guided to the fan installation portion 55b without being restricted by the chamfer 56 and being restricted in flow. Further, since the cooling air that has flowed into the fan installation portion 55b has a recess 59 formed on the rear surface 55d, the cooling air is not throttled on the suction side of the fan and the flow direction is gradually changed to horizontal and sucked into the propeller fan 53. Be done.

[0018]

[Effect of device]

 In the present invention, after the cooling air flows through the condenser, it smoothly flows from the condenser installation portion to the fan installation portion, so that the pressure loss when the cooling air flows through the condenser duct can be reduced. The diameter of the motor can be reduced, the motor for driving the propeller fan can be downsized, and the power consumption of the motor can be reduced.

By forming a recess projecting rearward on the suction side of the fan in the fan installation portion of the condenser duct, it is possible to prevent cooling air from being throttled on the fan suction side in the fan installation portion, so that the pressure loss of the cooling air is reduced. Can be further reduced.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, (A) is a perspective view of a condenser duct, and (B) is a sectional view taken along the line BB of (A).

FIG. 2 shows a condenser duct of a conventional refrigeration unit, (A) is a perspective view, and (B) is a sectional view taken along the line BB of (A).

FIG. 3 is a schematic perspective view of a conventional container.

FIG. 4 shows a schematic configuration of a conventional refrigeration unit, (A)
Is a front view, (B) is a longitudinal sectional view taken along the line BB of (A), (C)
FIG. 6B is a transverse sectional view taken along the line CC of FIG.

[Explanation of symbols]

 42 Condenser section 55 Condenser duct 55a Capacitor installation part 55b Juan installation part 4 Capacitor 53 Propeller fan 56 Chamfer 57 Recess

Claims (2)

[Scope of utility model registration request] 1. A condenser duct in which a box-shaped condenser installation portion and a fan installation portion provided so as to project upward are provided in a substantially central portion of the condenser section in which the outside air circulates, and the condenser is installed in the condenser installation portion. In a refrigeration unit that is installed and is equipped with a propeller fan that rotates around a horizontal axis of rotation in the fan installation portion and blows cooling air forward, a wind guide part from the condenser installation portion of the condenser duct to the fan installation portion. A refrigeration unit having a chamfered or smooth curved surface. 2. The refrigerating unit according to claim 1, wherein a concave portion projecting rearward is formed on a suction side of the fan in the fan installation portion of the condenser duct.