JPS5829822Y2 - Split type air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a split type air conditioner, and particularly to a service valve used to connect an outdoor unit and an indoor unit.

The first refrigeration cycle of a split type air conditioner is
The one shown in the figure is common, and an outdoor unit 4 having a compressor 1, a condenser 2, and a pressure reducing device 3 is connected to an indoor unit 6 having an evaporator 5 through a refrigerant pipe 7.
Service valves 8, 8 were provided for the connection.

Note that 9 is a throttle mechanism, such as a capillary tube, provided in the liquid return bypass circuit 10.

With such a configuration, the service valves 8, 8 only serve to connect the refrigerant pipes 7 on the outdoor unit 4 side and the indoor unit 6 side, which is not preferable from the viewpoint of resource saving. .

The present invention provides a split type air conditioner that contributes to performance improvement, cost reduction, and resource saving by integrating the service valve described above and also having a liquid return mechanism.

An embodiment of the present invention will be described below with reference to FIGS. 2 and 3, in which the same parts as in FIG. 1 are designated by the same reference numerals.

An integrated service valve 11 is provided at a junction of a refrigerant pipe 7 that communicates an outdoor unit 4 having a compressor 1 and a condenser 2 with an indoor unit 6 having an evaporator 5.

This service valve 11 has first and second valve chambers 40 a and 40 b formed by a partition wall 40 approximately inside thereof, and communicates the first valve chamber 40 a and the second valve chamber 40 b with the partition wall 40 . A first outdoor connection port 21 and a first indoor connection port 22 communicate with the provided passage 32 and the first valve chamber 40a.
, a second indoor connection port 2 communicating with the second valve chamber 40b
3, a second outdoor connection port 24, a refrigerant throttle section 31, and the like.

The indoor unit 4 and the outdoor unit 6 are connected by connecting the refrigerant pipe 7 to the first and second indoor connection ports 22 and 23 and the first and second outdoor connection ports 21 and 24 of the service valve 11. Communicate.

FIG. 3 is a longitudinal cross-sectional view and a side view of the integrated service valve 11, in which the service valve 11 has a section A 25a that flows the refrigerant from the outdoor unit 4 to the indoor unit 6, and a section 8 that returns the refrigerant from the indoor unit 6 to the outdoor unit 4. The portion 25b is formed integrally with the portion 25b.

Then, the first indoor side connection port 22 and the first outdoor side connection port 21 are connected to the A section 25a, and the second indoor side connection port 23 and the second indoor side connection port are connected to the 8th section 25b. An outer connection port 24 and a gas seal 2.6 are provided.

Valve shafts 27 a and 27 b are provided in the A section and the 8 section 25 a and 25 b, respectively, and the cono valve shafts 27 a,
27b (7) The valve bodies 28 a and 28 b at the lower tips are coils 29 a provided at the upper part of the valve shafts 27 a and 27 b.
, 29b changes the state of contact with the valve seats 30a, 30b.

The valve seat 30a is configured to form a refrigerant throttle section 31, which is closed when the valve body 28a is in the position shown by the broken line.

32 is a passage for liquid return, and this passage 32 is connected to part A 25.
It is provided by penetrating through part a and part 25b.

The operation of the present invention constructed as described above will be explained with reference to FIGS. 2 and 3.

When the compressor 1 is energized and the air conditioner is operated, the refrigerant is compressed by the compressor 1 in the outdoor unit 4 and becomes high temperature and high pressure. The refrigerant enters the first valve chamber 40 a in the valve 11 through the first outdoor side connection port 21 , is depressurized at the refrigerant throttle section 31 , and flows out from the first indoor side connection port 22 .

After entering the indoor unit 6 and exchanging heat with the evaporator 5, the valve 1 is again connected to the second indoor connection port 23.
The air enters the second valve chamber 40 b in the compressor 1 , flows out from the second outdoor connection port 24 , and returns to the compressor 1 .

The air that has become cold air through heat exchange in the evaporator 5 is blown into the room by a blower (not shown) to provide desired cooling.

Note that in normal cases, the valve body 28b is connected to the liquid return passage 3.
2 is closed, and no refrigerant flows through the passage 32.

When the load changes while the refrigeration cycle is in operation, a sensing device (not shown) is activated to start or stop energizing the coil 29a, which causes the valve shaft 27
a is operated, the opening degree of the valve body 28a and the valve seat 30a changes, and the amount of refrigerant flowing out from the first connection port 22 to the evaporator 5 is changed in accordance with the fluctuation of the load.

Further, when the compressor 1 becomes overheated and needs to be cooled, a sensing device (not shown) moves the valve body 28b to open the end of the liquid return passage 32. A part of the refrigerant passes through this passage 32 from 8 to 8.
The refrigerant enters the refrigerant section 25b and is returned to the compressor 1 through the second outdoor connection port 24, where the compressor 1 is cooled by the heat of vaporization of the refrigerant.

In the outdoor unit 4, the casing vibrates due to the vibration of the compressor 1 and the pulsating flow inside the refrigerant pipe 7 through which discharged gas from the compressor 1 passes, generating vibration noise and affecting the operation of the valve 11. If the refrigerant pipe 7 is made to meander in order to avoid this, the cost will increase and the side effect of vibration of the pipe 7 itself will occur.

To prevent this, the condenser 2 housed in the outdoor unit 4 can be functionally separated as shown in FIG.
Although not shown, slits may be provided in the fins of the condenser 2 to weaken the mechanical bonding force.

The above mentioned outdoor unit 4, but indoor unit 6
If there is a risk of this occurring on the other side, the same method can be used.

As described above, according to the present invention, since the service valve used to connect the refrigerant pipe that communicates between the outdoor unit and the indoor unit is integrated, a liquid return passage can be provided, and the refrigerant pipe can be simply connected to the integrated service valve. It is sufficient to simply join them together, and it has practical effects such as improving performance, reducing costs, and contributing to resource conservation.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional refrigeration cycle, Fig. 2 is an explanatory diagram of a refrigeration cycle showing an embodiment of the split type air conditioner of the present invention, and Fig. 3 is a vertical cross-sectional view of the integrated service valve, which is also the main part. FIG. 4 is a schematic structural diagram showing a part of the same. 1... Compressor, 2... Condenser, 5...
...Evaporator, 11...Integrated service valve.

Claims (1)

[Scope of utility model registration request] An outdoor unit having a compressor and a condenser, an indoor unit having an evaporator, and a first and second valve chamber formed by a partition wall inside, and a passage communicating the first valve chamber and the second valve chamber. The partition wall is provided with a first indoor connection port that communicates with the first valve chamber, a second indoor connection port that communicates the first outdoor connection port with the second valve chamber, and a second outdoor connection port that communicates with the second valve chamber. A service valve having a connection port, the outdoor unit, and the indoor unit are communicated via a refrigerant pipe, first and second indoor connection ports, and first and second outdoor connection ports of the service valve. A split-type air conditioner that is characterized by