JPS5949459A - Refrigeration cycle of air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refrigeration cycle for an air conditioner.

Conventional structure and its problems Conventionally, in an air conditioning/heating reversible refrigeration cycle including a four-way switching valve, in order to effectively utilize the cold energy of condensed water during cooling, the first
As shown in the figure, compressor a, , direction switching) Fb, heat source side heat exchanger C2 usage side heat exchanger d, 1st: capillary tube e, 2nd capillary tube f'f: piping 1 connected refrigerant circuit. The piping q between the first capillary tube e and the second capillary tube f is stored in a water tray and is immersed in condensed water 1 for heat exchange. It is known that this heat exchanger action increases the VC cooling capacity during refrigeration operation, as indicated by the solid line arrow in the figure. ing.

However, in this structure, the refrigerant for heat exchange is the first hair a1.
Since the temperature of the condensed water is reduced to an intermediate temperature, there is a small temperature difference between the condensed water and the condensed water.

In order to eliminate this drawback, as shown in FIG. ni
Heat source 1ull from the c side end to the end of the four-way switching valve
ν? The exchanger C and the piping K are immersed in condensed water i stored in a water tray, and the water is dispersed by a fan to exchange heat.
There is also a known structure in which the cooling capacity is set to 1'T during cooling operation (as indicated by the solid line arrow in the figure), but with this structure, during heating operation as indicated by the dashed line arrow in the figure, the temperature in the pipes drops to zero. This had the major drawback of freezing the condensed water and causing visitors to rotate the fan outside the room.In addition, in Figure 2, parts with the same function as in Figure 1 have the same amount of The explanation will be omitted.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned drawbacks of the conventional fan, and aims to improve the performance during cooling operation and to prevent damage to the outdoor fan even during heating operation.

Structure of the Invention In order to achieve this object, the present invention provides a branched pipe with a sealed tip in the middle of a refrigerant pipe leading to a heat exchanger on the heat source side, and connects a pipe from the branched part to the medium heat part of the pipe. A circuit portion having a high position is provided, and a porous hole (substance or fibrous material is disposed in front of the circuit portion) extending to a position higher than the branch portion,
The tip of the tube is immersed in condensed water.

This configuration allows effective heat exchange between the condensed water and the high-temperature, high-pressure refrigerant.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to accompanying drawings P and 3 to 5.

In the figure, 1 is a compressor and 2 is a four-way switching valve.

3 is a heat exchanger on the heat source side, 4 is a heat exchanger on the usage side, and 6 is a capillary tube, which are connected by piping as shown in FIG. 3 to constitute a refrigeration cycle. During cooling operation, the four-way switching valve 2 is connected as shown by the solid line, and the direction in which the refrigerant flows is as shown by the solid arrow. Further, during heating operation, the four-way switching valve 2 is connected to 1 shown by the broken line, and the direction in which the refrigerant flows is the direction shown by the broken line arrow. 6 has one end sealed and the other end connected to a heat source (disposed between the till heat exchanger 3 and the four-way switching valve 2).
♀71/ This is a pipe that is branched and connected, and a circuit portion 6a is formed at a position higher than the connection portion and the tube tip portion between the connection portion and the tube tip portion. Furthermore, the tip of the tube 6 is immersed in condensed water 9 stored in a water receiver 118. 7. As shown in FIGS. 4 and 5, the inner surface of the tube 6 is coated with a porous or fibrous material from the tip to the highest point of the circuit section 6 and higher than the connection section. A wick of 1° is provided.

In the above configuration, when the cooling operation is started, the refrigerant in the pipe 7 becomes high temperature and high pressure superheated steam, and - the ancient temple side heat exchanger 4
The condensed water 9 stored in the water receiver 11118 has a temperature sufficiently lower than the temperature of the refrigerant in the pipe 7, and the superheated vapor refrigerant is cooled and condensed, and as shown in FIG. The liquid is sucked up by capillary action, becomes a droplet 11, returns to the connection part, and vaporizes.

In this way, the superheated steam is sequentially supplied as indicated by the arrow A, and a large amount of heat is exchanged in the heat exchanger, so that the load on the heat source side heat exchanger 3, which acts as a condenser, is reduced. The compressor 1 becomes smaller, the high pressure becomes lower, the cooling capacity increases, the input to the compressor 1 decreases, and the operating efficiency increases.

In addition, when the heating operation is performed, the refrigerant in the pipe 7 is in a low-pressure, low-temperature, superheated or saturated steam state, and the water tray 8
Although the temperature is lower than that of the condensed water 9 in the pipe, there is no wick 10 near the connection part that causes capillary action, so no heat transfer occurs.

Therefore, heat transfer is only sensible heat transfer, which is extremely small compared to during cooling operation.

Effects of the Invention As is clear from the above explanation, the refrigeration cycle of the present invention is configured by a four-way switching valve, a compressor, a user-side heat exchanger, and a heat source-side heat exchanger, and can be used during cooling operation. A branched pipe with a sealed tip is provided in the piping serving as the inlet of the heat source side heat exchanger, and a circuit section is provided in the center of the pipe tip of this tube and the connection part, and has a position higher than the connection part and the tip part. Further, a porous material or a fibrous material is disposed on the inner circumferential surface of the tube and extends from the tip of the tube to a position higher than the highest point of the circuit section and higher than the connection section, and Immerse the tip i<3 in condensed water from the evaporator/
When operating the air conditioner, the high temperature fl' before entering the condenser is
r:I The superheated vapor refrigerant is refrigerated by condensed water from the evaporator, increasing the cooling capacity and reducing the compressor input by lowering the high pressure. There is almost no heat exchange between the refrigerant and the condensed water, and it is effective in preventing IE from freezing of the condensed water.

4. Brief explanation of the drawing
d Fig. 1 is a refrigeration cycle diagram showing a conventional example, Fig. 2 is a refrigeration cycle diagram showing another conventional example, Fig. 3 is a refrigeration cycle diagram showing an example of the present invention, and Fig. 4 is a refrigeration cycle diagram showing a conventional example. 5 is a sectional view of the piping section that exchanges heat with condensed water during cooling, and FIG. 5 is a sectional view of the same piping section during heating.

1... Compressor, 2... Four-way switching valve, 3...
... Heat source side heat exchanger, 4 ... Utilization side heat exchanger, 5 ... Capillary tube or aperture, 6 ...
・Pipe, 6a...Curved section, 8...Water receiver IU
I, 9...condensed water, 1o...wick.

Name of agent: Patent attorney Toshio Nakao and 1 other person 1 illustration Figure 2 Figure 3

Claims (1)

[Claims] The four-way switching valve is connected to the discharge pipe, suction pipe, utilization side heat exchanger, and heat source side heat exchanger of the compressor.
I, the other ends of each heat exchanger on the heat source side are connected via a pressure reducing device to configure a refrigeration cycle capable of switching between cooling and heating, and further includes a heat exchanger on the heat source side, and a heat source fJi! of a four-way switching valve. l
A tube with a sealed tip is connected from the end on the heat exchanger side to the refrigerant circuit leading to the heat exchanger on the heat source side, and between the tube tip and the connection part of this tube, the above is connected to the connection part and the tip part. A curved path section having a curved path at a higher position is provided, and a porous material or a fibrous material is further arranged on the inner circumferential surface of the tube from the tip end of the tube to a position beyond the highest point and higher than the connecting section. A refrigeration cycle for an air conditioner in which the tip of the tube is immersed in condensed water from an evaporator.