JPH01134168A - Refrigerator - Google Patents

Abstract

PURPOSE: To reduce the size of a refrigerating machine by coupling an air-cooled condenser and a water-cooled condenser in series with the refrigerant delivery side pipeline of a compressor and providing the conduction unit of the air-cooled condenser with a control means for decreasing the air volume during operation of the water-cooled condenser. CONSTITUTION: An air-cooled condenser 5 and a water-cooled condenser 6 are coupled in series with the refrigerant delivery side pipeline of a compressor 4 so that they can be operated selectively by a client. When the water-cooled condenser 6 is operated, water piping 8 thereof is coupled with city water piping and supplied with cooling water. The first control means 20 in a controller 19 delivers a signal for rotating a first fan 16 and stopping second and third fans 17, 18. Delivery refrigerant from the compressor 4 is thereby cooled to some extent by the condenser 5 and then condensed through the condenser 6 and stored in a liquid receiving tank 11. Since the refrigerant is precooled by the condenser 5, it can be condensed easily and the size of the condenser and thereby the size of a refrigerating machine can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a refrigeration device incorporated into a refrigeration case or the like.

(B) Prior Art Conventionally, a refrigeration system using both an air-cooled condenser and a water-cooled condenser is disclosed in Japanese Patent Publication No. 17776/1983.

This involves connecting an air-cooled condenser and a water-cooled condenser in parallel, and installing a valve in each pipe connected to these two condensers. The condenser and the condenser can be used separately.

(c) Problems to be solved by the invention In such a refrigeration system, an air-cooled condenser and a water-cooled condenser are connected in parallel, and the two condensers are used independently. The size of the container had to be commensurate with the amount of refrigerant circulated in the refrigeration equipment, and each condenser became larger, which caused the refrigeration equipment to become thicker as well.

The present invention provides a refrigeration system that solves these problems.

In order to achieve this object, the present invention connects an air-cooled condenser and a water-cooled condenser in series to the refrigerant discharge side pipe of the compressor, and The air blowing device for the condenser is provided with a control means for reducing the air volume when the water-cooled condenser is operated.

(E) Function Since the air volume of the air blower of the air-cooled condenser is lowered when the water-cooled condenser is activated, the refrigerant flowing into the water-cooled condenser during this operation is preliminarily condensed in the air-cooled condenser, and the water-cooled condenser is It is reliably condensed and liquefied in the condenser.

(f) Embodiment In the drawings, 1 is a refrigerator unit housed in the casing of the showcase, and this unit is connected to the cooler (evaporator) 2 of the showcase by a refrigerant pipe 3. In FIG. 1, 4 is a compressor, and 5 is an air-cooled condenser disposed in the discharge side pipe of the compressor 4, which is a plate fin type heat exchanger. Reference numeral 6 denotes a water-cooled condenser disposed on the outlet side piping 7 of the air-cooled condenser 5, and is a double-pipe heat exchanger. When operating the water-cooled condenser 6, a city water pipe (not shown) is connected to the inlet 9 and outlet 10 of the water pipe 80.
Cooling water is made to flow through this water pipe 8. 11 is a liquid receiver, 12 is a dryer, and these devices are connected in series with a refrigerant pipe. 13 and 14 are service valves on the inlet and outlet sides, and 15 is a pressure reducer. Reference numerals 16, 17, and 18 are blowers for the air-cooled condenser 5, and the operation thereof is controlled (ON/OFF control) by the control device 19. In this way, the three blowers 16, 17, and 18 and the control device 19 constitute a blower device. The tenth blower 16 is caused to rotate by the first control means 20 not only when the air-cooled condenser 5 is operated but also when the water-cooled condenser 6 is operated. On the other hand, the second and third blowers 17,18 are rotated by the second control means 21 when the air-cooled condenser 5 is activated.

When the water-cooled condenser 6 is in operation, its rotation is stopped.

FIG. 2 is a plan view of this refrigerator unit 1, in which a compressor 4. An air-cooled condenser 5°, a water-cooled condenser 6, etc. are installed. Specifically, the air-cooled condenser 5 is arranged in the longitudinal direction of the substrate 30.

Along this condenser 30 there are three blowers 16, 17° 18
are lined up, and the rotation of the blowers 16, 17, and 18 causes outside air to flow as shown by solid line arrows and broken line arrows. The compressor 4 is connected to the air passage 31 on the leeward side of the first air blower 16.
The water-cooled condenser 6 is connected to the leeward passage 3 of the third blower 18.
They are placed in 2 respectively. This water-cooled condenser 6 is formed into a substantially cylindrical shape, and a liquid receiver 1 is placed in the hollow part of the condenser 6.
1 is stored. These devices are connected by refrigerant piping indicated by a dash-dot line, and the refrigerant flows as indicated by a dash-dot arrow. Reference numeral 33 denotes an electrical box in which electrical components 34 of the refrigerator unit 1 are housed, and this electrical box 33 slides in the lateral direction of the board 30 by a guide rail 35 extending in the lateral direction as shown by the solid line arrow. .

This refrigerator unit 1 can use an air-cooled condenser 5 or a water-cooled condenser 6 depending on the customer's request. First, when using the air-cooled condenser 5 (not using the water-cooled condenser 6), do not connect the city water pipe (not shown) to the water pipe 8 of the water-cooled condenser 6. The three blowers 16, 17, and 18 are all rotated by signals from the control device 19, that is, the two control means 20.21, so that the refrigerant discharged from the compressor 4 is condensed in the air-cooled condenser 5. It becomes a liquid refrigerant. This liquid refrigerant is stored in the water-cooled condenser 6 and liquid receiver 11 that are not in operation. In other words, the water-cooled condenser 6 also acts as a so-called liquid receiver.

On the other hand, when using a water-cooled condenser 6, a city water pipe (not shown) is connected to the water pipe 8 of the condenser 6, and cooling water is allowed to flow into the water pipe 8. At this time, the first control means 20 of the control device 19
The first blower 16 is rotated by the signal from the second blower 16, and the rotation of the second and third blowers 17 and 18 is stopped. Therefore, the refrigerant discharged from the compressor 4 is cooled somewhat (compared to the operation of the air-cooled condenser 5 mentioned above) in the air-cooled condenser 5, and then condensed and liquefied in the water-cooled condenser 6. The refrigerant is stored in a liquid receiver 11. In this way, the refrigerant flowing into the water-cooled condenser 6 is easily condensed and liquefied because it has been cooled in advance by the air-cooled condenser 5. Therefore, the size of this water-cooled condenser 6 is relatively small (but it is sufficient. At this time, the compressor 4 is hit by the air discharged from the first blower 16.

The compressor 4 is cooled by this wind.

In the above embodiment, the blower device includes three blowers 16.17.
, 18, but it is also possible to use just one blower (,
In that case, the rotation speed of this blower may be made variable so that when the water-cooled condenser is operated, the speed may be lowered to lower the air volume.

(g) Effects of the Invention The present invention connects an air-cooled condenser and a water-cooled condenser in series to the refrigerant discharge side conduit of a compressor, and adjusts the air volume of the air blower of the air-cooled condenser to that of the water-cooled condenser. Lowers when activated 5
Since the refrigerant is also cooled in the air-cooled condenser when the water-cooled condenser is operated, the water-cooled condenser can be made smaller and the refrigeration system can be made smaller. Furthermore, if a compressor is placed in the ventilation path of the blower, the blower can also serve as a cooling means for the compressor when the water-cooled condenser is in operation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a refrigerant circuit diagram of a refrigeration system, and FIG. 2 is a plan view of a refrigeration unit incorporating this system. 4...Compressor,...Air-cooled condenser, 6...
Water-cooled condenser, 16, 17, 18...-Blower,
19...control device, 20...control means, 31.
...Air duct.

Claims (1)

[Claims] 1) A refrigeration system in which an air-cooled condenser having an air blower and a water-cooled condenser are provided in the refrigerant discharge side pipe of the compressor,
A refrigeration system characterized in that the air-cooled condenser and the water-cooled condenser are connected in series, and the air blower is provided with a control means for lowering the air volume when the water-cooled condenser is operated. 2) The refrigeration system according to claim 1, characterized in that a compressor is disposed in the air passage of the blower.