JPS60181559A - 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 the Invention The present invention relates to a refrigeration cycle for an air conditioner that enables dehumidifying operation.

Conventional Structure and Problems Conventionally, this type of air conditioner has been structured as shown in FIG. Namely, 1 is a compressor, 2 is a four-way valve, 3 is an outdoor heat exchanger, 4 is a throttling device, 6 is a two-way valve for throttling bypass, 9 is a reheater, 7 is a dehumidifying throttle, and 8 is a two-way dehumidifying throttle bypass. A valve, 6 is an indoor heat exchanger, 10.11 is a fan, and the arrow in the figure indicates the direction of airflow. The flow of refrigerant during cooling and heating is well known, so it will not be described here. .

During dehumidification operation, as shown by the broken line in the figure, the refrigerant discharged from the compressor 1 is guided to the outdoor heat exchanger 3 through the four-way valve 2, where it is partially heated and then passed through the two-way throttle bypass valve 6. The heat passes through and enters the reheater 9 to radiate heat. Then, the pressure is further reduced by the dehumidifying throttle 7, and heat exchange is performed indoors.

It is evaporated in the exchanger 6 and returned to the compressor 1 to form a refrigeration cycle. Here, the air passing through the indoor heat exchanger 6 absorbs heat due to the refrigerant evaporation action of the refrigeration cycle, is cooled and dehumidified, and becomes cold, dry air.Next, this knee air is transferred to the reheater 9.
The air is heated by the heat dissipation effect of the refrigeration cycle, and becomes room temperature or warm dry air for dehumidifying operation.

However, in the disembarkation refrigeration cycle, the temperature of the refrigerant entering the reheater 9Tlc decreases because it passes through the outside heat exchanger 3, and the temperature of the air blown out from the air conditioner decreases. It has gone down a lot.

Therefore, it is only possible to increase the size of the indoor heat exchanger 6, and sufficient dehumidification capacity cannot be obtained.

Furthermore, in order to raise the temperature of the blown air, the outdoor blower 11 is stopped and the high pressure is increased, so the input to the compressor 10 becomes extremely high. Also, as shown in Figure 2, when a normal air conditioner is heating,
The flow of refrigerant is configured as shown in the figure, and the flow is reversed during cooling.

Therefore, if the dehumidification cycle is configured by simply adding the dehumidifying throttle 7 while leaving the air flow as it is, the reheater 9
is placed at the front in terms of the wind circuit, and the indoor heat exchanger 6 is placed at the back and is no longer dehumidified.

Purpose of the Invention The purpose of the present invention is to solve the above-mentioned problems and obtain sufficient dehumidifying ability.Structure of the InventionIn order to achieve this purpose, the present invention aims to directly drain the refrigerant discharged from the compressor. Switch the four-way valve so that it leads to the reheater, install the reheater later in the wind circuit, and install a dehumidifying pressure reducing device and a two-way valve for bypassing the dehumidifying pressure reducing device in parallel to connect it to the outdoor heat exchanger. It is configured to connect.

DESCRIPTION OF EMBODIMENTS The present invention will be explained below with reference to FIG. 2, which shows one embodiment of the present invention. FIG. 2 is a refrigeration cycle diagram showing the present invention, where 1 is a compressor, 2 is a four-way valve, and 3 is a outdoor heat exchanger, 4 is a throttle device, 6 is a two-way valve for throttle bypass, 6 is an indoor heat exchanger, 7 is a dehumidifying throttle, 8 is a two-way valve for dehumidifying throttle bypass, 9 is a reheater, 10
, 11 are fans.

In the above configuration, during dehumidification operation, the refrigerant discharged from the compressor 1 is connected to the reheater 9 through the four-way valve 2, and the high-temperature refrigerant directly enters the reheater 9, radiating a large amount of heat. Further, the heat is absorbed by the indoor heat exchanger 6 through the dehumidifying throttle 7, and a dehumidifying operation can be performed. Next, the refrigerant that has exited the indoor heat exchanger 6 passes through the two-way throttle bypass valve 6, passes through the outdoor heat exchanger 3, and returns to the compressor 1. Note that the fan 11 on the outdoor side is stopped.

In this way, since the high-temperature refrigerant enters the reheater 9, the amount of heat radiation is increased and the temperature of the air blown into the room does not decrease.

If you want to further increase the temperature of the blown air, if you operate the fan 11 on the outdoor side, the amount of heat absorbed by the outdoor heat exchanger 3 will increase, and therefore the amount of heat radiated by the reheater 9 will also increase. The temperature of the blowing air can be increased. In addition,
In the embodiment described above, the throttle bypass two-way valve 5 is connected so as to bypass the throttle device 4, but it can be implemented similarly even if the throttle device and the total external heat exchanger 3 are bypassed.

Effects of the Invention As is clear from the above embodiments, since the air temperature of the refrigeration cycle of the air conditioner of the present invention can be increased,
Indoor heat exchange can be increased, and the amount of dehumidification can be increased. Also, no parts are required in addition to conventional components.

[Brief explanation of the drawing]

FIG. 1 is a refrigeration cycle diagram of a conventional air conditioner, and FIG. 2 is a refrigeration cycle diagram of an air conditioner showing an embodiment of the present invention. 1... Compressor, 2... Four-way valve, 3...
...Outdoor heat exchanger, 4... Throttle device, 5.
...Two-way valve for throttle bypass, 6... Indoor heat exchanger, 7... Throttle for dehumidification, 8...
Two-way valve for dehumidifying throttle bypass, 9...Reheater.

Claims (1)

[Claims] A compressor, a four-way valve, an outdoor heat exchanger, a throttling device, an indoor heat exchanger, and a reheater are connected in sequence to constitute an air heat source type air conditioner capable of dehumidification, cooling and heating operation, and A refrigeration cycle for an air conditioner in which discharged refrigerant is directly introduced into the reheater.