JPH0518639A - Refrigerator - Google Patents

Abstract

PURPOSE:To reduce the number of pipings installed astride a boundary between a heat-exchange chamber and a machine room and to reduce the number components. CONSTITUTION:A compressor 30, a main condenser 31, an auxiliary condenser 33, and a liquid receiver 32 are interconnected, in the order named, through pipings. A fan 34 to cool the two condensers 31 and 33 is provided, and a freezer unit is divided into a machine room 36 containing the compressor 30 and the liquid receiver 32 and a heat-exchanger chamber 37 having the two condensers 31 and 33 and the fan 34. Further, In the refrigerator unit formed such that a liquid refrigerant is introduced to the auxiliary condenser 33 to provide subcooling, a gas liquid separator 42 is connected between the main and auxiliary condensers 31 and 33 through a piping, and the gas liquid separator 42 is arranged in the heat-exchanger chamber 37.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air-cooled refrigerator unit composed of a compressor, a plate fin type condenser and a fan.

[0002]

2. Description of the Related Art Heretofore, a refrigerator unit of this type has been constructed as disclosed in Japanese Utility Model Publication No. 3-5789.

In such a refrigerating machine unit, a refrigerant circuit is constructed so as to return the liquid refrigerant gas-liquid separated in the liquid receiver to the condenser for cooling in order to increase supercooling.

On the other hand, such a refrigerator unit is classified into an integrated type for outdoor use and a separated type for indoor use depending on the application.

As a concrete example of the integrated type, as shown in FIG.
A compressor 5, a main condenser 2, a liquid receiver 3 and an auxiliary condenser 4 are connected by piping, a fan 5 for cooling both condensers 2 and 4 is provided, and a casing 6 has a machine room 7 and a heat exchange room 8 therein. The heat exchanger chamber 8 is divided into the two condensers 2 and 4 and the fan 5
In the machine room 7, the compressor 1 and the liquid receiver 3 are respectively housed.

An expansion valve 10 and an evaporator 11 are connected to the extraction pipe 9 of the refrigerator unit.

As a concrete example of the separation type, as shown in FIG. 5, the compressor 12, the main condenser 13, the liquid receiver 14 and the auxiliary condenser 15 are connected by piping, and both condensers 13 and 15 are cooled. And a fan 19 for controlling the machine chamber 16 and a casing 23 for defining the machine chamber 16 and a casing 23 for defining the heat exchange chamber 18, which are separated from each other. The fan 19 is configured by housing the compressor 12 and the liquid receiver 14 in a casing 17.

Also in this case, the expansion valve 21 and the evaporator 22 are connected to the extraction pipe 20 of the refrigerator unit.

[0009]

However, according to the above construction, in either case of the integral type or the separation type, the pipes A and B from the main condensers 2 and 13 to the liquid receivers 3 and 14 and the receiving side are provided. The pipes C and D that exit the liquid units 3 and 14 and reach the auxiliary condensers 4 and 15 are laid across both the heat exchange chambers 8 and 18 and the machine chambers 7 and 16, so the pipes that lie between them are There are problems that the total number is 4, and the number of pipes is large and the connection work is complicated.

The present invention has been made in view of the above problems, and an object thereof is to reduce the number of pipes extending over the heat exchange chamber and the machine room, reduce the number of parts, and reduce the piping work.

[0011]

According to the present invention, a compressor, a main condenser, an auxiliary condenser, a liquid receiver, etc. are connected in this order by piping, and a fan for cooling both condensers is provided. Refrigeration with a machine room with a compressor and a receiver and a heat exchange room with both condensers and fans, and a liquid refrigerant introduced into the auxiliary condenser to obtain supercooling In the machine unit, a gas-liquid separator is pipe-connected between the main condenser and the auxiliary condenser, and the gas-liquid separator is installed in the heat exchange chamber.

According to the present invention, the opening of the inlet pipe in the liquid receiver is formed below the opening of the outlet pipe.

Further, in claim 1, a sight glass is provided in the pipe between the auxiliary condenser and the liquid receiver.

[0014]

The refrigerator unit of the present invention has the above-mentioned structure.
Both the pipe from the main condenser to the gas-liquid separator and the pipe from the gas-liquid separator to the auxiliary condenser can be processed in the heat exchange chamber and spans the heat exchange chamber and the machine chamber. It is possible to reduce the number of pipes to only two, that is, the pipe from the compressor to the main condenser and the pipe from the auxiliary condenser to the liquid receiver, and the number of parts can be reduced to reduce the piping work.

Moreover, since the gas-liquid separator is provided separately from the liquid receiver, the capacity of this separator may be small enough to supply the liquid refrigerant to the auxiliary condenser, and the unit may be enlarged. Absent.

Further, since the opening of the inlet pipe in the receiver is formed below the opening of the outlet pipe, even if the liquid refrigerant in the receiver is not so much, the receiver can be filled with pseudo liquid. The auxiliary condenser and the inlet / outlet pipe can be easily filled with the liquid refrigerant, and the effect of supercooling can be improved.

Furthermore, since the sight glass is provided in the pipe between the auxiliary condenser and the liquid receiver, it is possible to confirm the full liquid in an appropriate state, and it is erroneous when other pipes are flushed. You can avoid confirmation.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of an integrated refrigerator unit.

This unit includes a compressor 30 and a main condenser 3
1, the gas-liquid separator 42, the auxiliary condenser 33, and the liquid receiver 32 are connected in this order by piping, and a fan 34 for cooling both condensers 31, 33 is provided, and a partition plate 38 is provided inside the casing 35.
The heat exchange chamber 37 is divided into a machine room 36 and a heat exchange chamber 37, and both heat condensers 31, 33, a fan 34, and a gas-liquid separator 42 are housed in the heat exchange chamber 37, while the compressor 3
0 and a receiver are stored.

The expansion valve 4 is connected to the extraction pipe 39 of the refrigerator unit.
0 and the evaporator 41 are connected.

Here, the condensers 31 and 33 are of the plate fin type, and the plate is a common component, and
By connecting the upper and lower pipes separately, the main condenser 31 is formed in the upper part and the auxiliary condenser 33 is formed in the lower part.

The liquid receiver 32 is constructed as shown in FIG. 2, and the opening 43A of its inlet pipe 43 (which is connected to the outlet pipe H of the auxiliary condenser 33) is connected to the outlet pipe 44 (drawer pipe 39).
(Connected to) is set at a position a below the opening 44A.

The outlet pipe H of the auxiliary condenser 33 is provided with a sight glass 45 for visually confirming the state of the refrigerant in the refrigerant circuit.

In the refrigerator unit thus constructed, since the gas-liquid separator 42 is arranged in the heat exchange chamber 37, the pipe E which exits the main condenser 31 and reaches the gas-liquid separator 42.
And the pipe F that exits the gas-liquid separator 42 and reaches the auxiliary condenser 33.
Both can be connected in the heat exchange chamber 37,
There are only two pipes extending over the heat exchange chamber 37 and the machine chamber 36: a pipe G extending from the compressor 30 to the main condenser 31 and a pipe H exiting from the auxiliary condenser 33 to the liquid receiver 32. be able to.

As a result, it is possible to reduce the number of pipes extending over the heat exchange chamber 37 and the machine chamber 36 by two, reducing the number of parts and connecting the pipes satisfactorily.

In this case, the liquid refrigerant separated by the gas-liquid separator 42 is supplied to the auxiliary condenser 33, and the auxiliary condenser 3
Since No. 3 is cooled in a liquid-filled state, the effect of supercooling can be sufficiently exerted.

Moreover, since the gas-liquid separator 42 is provided separately from the liquid receiver 32, the capacity of the separator 42 need only be small enough to supply the liquid refrigerant to the auxiliary condenser 33, and is installed at the upper part of the unit. However, there is no problem in strength and the unit does not become large.

That is, the liquid receiver 32 can store the total amount of the refrigerant enclosed in the refrigerant circuit in consideration of the time when the evaporation temperature of the evaporator 41 is lowered and the refrigerant circulation amount is decreased or the pump is down. Since it is designed as described above, it is considerably large, but the gas-liquid separator 42 of this embodiment is sufficient if it has a capacity capable of filling the auxiliary condenser 33 with liquid.

Since the gas-liquid separator 42 is exposed to the outside air by the air blown by the fan 34, the cooling of the liquid refrigerant in the separator 42 is promoted and the supercooling effect can be enhanced.

Further, the liquid receiver 32 has an opening 43 of the inlet pipe 43.
Since A is formed below the opening 44A of the outlet pipe 44, even if the liquid refrigerant in the receiver 32 is not so large, the receiver can be in a pseudo full liquid state, and the auxiliary condensation Bowl 3
3 and the pipes F and H are likely to be filled with the liquid refrigerant, and the effect of supercooling can be improved.

Further, since the sight glass 45 is provided in the pipe H which is always full, it is possible to confirm the refrigerant in an appropriate state and avoid erroneous confirmation such as visual confirmation in the flash state.

That is, since the liquid refrigerant becomes full from the downstream side, for example, when a sight glass is provided in the outlet pipe of the liquid receiver 32 as in the conventional case, when the pipes F and H are in a flush state. Therefore, the proper refrigerant state cannot be confirmed.

Further, FIG. 3 shows an example of a separation type, in which the compressor 5
0, main condenser 51, gas-liquid separator 62, auxiliary condenser 53,
The receiver 52 is connected by piping, and both condensers 51, 53 are connected.
Is provided with a fan 54 for cooling, and a casing 56 that defines a machine chamber 55 and a casing 58 that defines a heat exchange chamber 57. Vessels 51, 53, fan 5
4 and the gas-liquid separator 62 are housed, while the casing 5
6, a compressor 50 and a liquid receiver 52 are housed respectively.

An expansion valve 60 and an evaporator 6 are attached to a drawing pipe 59 of a refrigerator unit composed of two casings 56 and 58.
1 is connected.

Also in this case, the gas-liquid separator 62 has the heat exchange chamber 57.
Is located in the main condenser 51 and exits the gas-liquid separator 62.
From the pipe I leading to the gas and liquid separator 62 and the auxiliary condenser 53
Since both of the pipes J up to and can be connected in the heat exchange chamber 57, the same effect as the example of FIG. 1 can be obtained.

[0037]

As described above, according to the present invention, both the pipe that exits the main condenser to the gas-liquid separator and the pipe that exits the gas-liquid separator to the auxiliary condenser are placed in the heat exchange chamber. The number of pipes spanning the heat exchange chamber and the machine room can be reduced to only two pipes, one from the compressor to the main condenser and one from the auxiliary condenser to the liquid receiver. The number of parts can be reduced, and the piping work can be reduced.

Moreover, since the gas-liquid separator is provided separately from the liquid receiver, the capacity of this separator may be small enough to supply the liquid refrigerant to the auxiliary condenser, and the unit may be enlarged. Absent.

Further, since the opening of the inlet pipe in the receiver is formed below the opening of the outlet pipe, even if the liquid refrigerant in the receiver is not so large, the receiver can be filled with pseudo liquid. The auxiliary condenser and the inlet / outlet pipe can be easily filled with the liquid refrigerant, and the effect of supercooling can be improved.

Further, since the sight glass is provided in the pipe between the auxiliary condenser and the liquid receiver, it is possible to confirm the full liquid in an appropriate state, and avoid erroneous confirmation.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an integrated refrigerator unit.

FIG. 2 is an explanatory diagram of a liquid receiver.

FIG. 3 is a configuration diagram of a separated refrigerator unit showing another embodiment.

FIG. 4 is a configuration diagram of an integrated refrigerator unit showing a conventional example.

FIG. 5 is a configuration diagram of a separation type refrigerator unit showing a conventional example.

[Explanation of symbols]

30,50 compressor 31,51 Main condenser 32,52 receiver 33,53 Auxiliary condenser 34,54 fans 42,62 gas-liquid separator 45 sight glass

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor, Sunaga Hiki             2-18 Keihanhondori, Moriguchi-shi Sanyo Electric Co., Ltd.             Inside the company

Claims (3)

[Claims] 1. A compressor, a main condenser, an auxiliary condenser, a liquid receiver, etc. are connected in this order by piping, and a fan for cooling both condensers is provided, and a compressor and a liquid receiver are provided. In the refrigerator unit configured to be divided into a machine room and a heat exchange room having both condensers and a fan, and further to obtain subcooling by introducing a liquid refrigerant into the auxiliary condenser, the main condenser A refrigerator unit in which a gas-liquid separator is connected between the auxiliary condenser and a pipe and the gas-liquid separator is installed in a heat exchange chamber. 2. The refrigerator unit according to claim 1, wherein the opening of the inlet pipe in the liquid receiver is formed below the opening of the outlet pipe. 3. The refrigerator unit according to claim 1, wherein a sight glass is provided in a pipe between the auxiliary condenser and the liquid receiver.