JPS6311573Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a split type air conditioner with an improved valve device for connecting connection pipes.

Conventionally, a split type air conditioner has an outdoor unit 1 with a compressor 1 inside, as shown in FIG.
The indoor unit 15 has an evaporator 16 and a condenser 13.
and a pressure reducing device 14 were used, and the two were connected via a liquid side valve device 2 and a gas side valve device 3.

However, in such a split type air conditioner, the pressure reducing device 14 is located inside the indoor unit 15, so
The refrigerant flowing through the pressure reducing device 14 generates abnormal noise, and this abnormal noise is transmitted into the room, causing a problem.

Therefore, it is conceivable to install the pressure reducing device 14 inside the outdoor unit 1. In such a case, the liquid side valve device 2 is located on the outflow side of the pressure reducing device 14, which causes the disadvantage that heat is more easily dissipated than the liquid side valve device 2.

This invention was made with attention to the above circumstances,
The purpose is to provide a split type air conditioner that can reduce heat radiation loss in the liquid side valve device and downsize the liquid side valve device.

That is, in order to reduce the amount of heat dissipated, the present invention makes the inner diameter of the portion of the liquid-side valve device in contact with the valve body smaller than the inner diameter of the portion of the gas-side valve device in contact with the valve body. The valve body is made smaller than the valve body of the gas side valve device, and the outer diameter of the liquid side valve device is made smaller than the outer diameter of the gas side valve device.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 2 to 4. In addition, in Figure 2, the first
Portions that are the same as those shown in the figures are given the same numbers and their explanations will be omitted. In this embodiment, a capillary tube 1 which is a pressure reducing device is installed in an outdoor unit 1.
4 are installed. A liquid side valve device 22 is provided on the outflow side of the capillary tube 14. Liquid side valve device 22 and gas side valve device 21
are both provided in the outdoor unit 1.
As shown in FIG. 3, this gas side valve device 21 has a flow path 24 in a cylindrical main body 23, and a shaft-shaped valve body 25 is inserted into this flow path 24 along the axial direction. A structure is used. The valve body 25 is screwed into the main body 23 so as to be movable back and forth, and by moving its tip toward and away from a valve seat 26 provided in the flow path 24, the flow path 24 can be opened and closed. There is. The gas side valve device 21 is also provided with a charge port 27 communicating with the flow path 24, and refrigerant is charged through the charge port 27.

The liquid side valve device 22 also has a flow path 29 in the cylindrical main body 28, as shown in FIG.
A structure is used in which a shaft-shaped valve body 30 is inserted into the flow path 29 along the axial direction. The valve body 30 is screwed into the main body 28 so as to be movable back and forth, and by moving its tip toward and away from a valve seat 31 provided in the flow path 29, the flow path 24 can be opened and closed. There is. Note that 4 is a liquid pipe connecting the indoor unit 15 and the outdoor unit 1, and 5 is a gas pipe (both are refrigerant pipes).

The outer shape of this liquid side valve device 22 is made small.

Specifically, when the inner diameter of the portion on the flow path 29 of the liquid side valve device 22 that contacts the valve body 30 is defined as H, the inner diameter of the portion that contacts the flow path 24 of the gas side valve device 21 and the valve body 25. is set to 1.5H. In other words,
The inner diameter of the flow path portion of the liquid side valve device 22 that the valve body 30 comes into contact with is reduced to 1.5 of that of the gas side valve device 21. Then, the outer diameter of the valve body 30 of the liquid side valve device 22 is reduced accordingly, and the entire main body 28 of the liquid side valve device 22 is made smaller than the entire main body 23 of the gas side valve device 21 by that amount. There is.
Specifically, the outer diameter and length of the main body 28 of the liquid side valve device 22 are made smaller than the outer diameter and length of the main body 23 of the gas side valve device 21. As a result, the outer shape of the liquid side valve device 22 is changed to the gas side valve device 21.
It is made smaller than the external shape, and the surface area is reduced.

Note that the gas side valve device 22 and the liquid side valve device 22
Hexagonal holes 25a, 3 are provided in the head of each valve body 25, 30.
0a is formed, and the hexagonal holes 25a, 30
By inserting a hexagon spanner into a, each valve body 2
It has a structure that allows you to operate 5, 30.

Therefore, in such a split type air conditioner, if the compressor 12 is operated with the gas side valve device 21 and the liquid side valve device 22 open, the compressor 1
The refrigerant discharged from the condenser 13, capillary tube (pressure reducing device) 14, liquid side valve device 22, liquid pipe (refrigerant pipe) 4, evaporator 16, gas pipe (refrigerant pipe) 5, and gas side valve device 21 and circulates in order to cool the room.

Here, since the liquid side valve device 22 is exposed to the outside as it is, during refrigeration cycle operation,
There is a possibility that a large heat radiation loss may occur from the liquid side valve device 22.

However, according to the present invention, the liquid side valve device 2
The outer diameter of the liquid side valve device 22 is made smaller than the outer diameter of the gas side valve device 21 by reducing the inner diameter of the flow path portion that contacts the valve body 30 of No. 2 and the diameter of the valve body 30 of the liquid side valve device 22. The surface area of the liquid side valve device 22 is reduced. Moreover, since the refrigerant flowing through the liquid side valve device 22 is in a liquid state, reducing the diameter does not pose a problem compared to the gas side valve device 21 in terms of pressure loss.

However, the heat radiation loss from the liquid side valve device 22 can be reduced without deteriorating the characteristics of the refrigeration cycle.

Moreover, since the liquid side valve device 22 is made smaller as a whole, it is possible to reduce the cost by reducing the weight and packaging volume accordingly. Moreover, there is an advantage that the degree of freedom in installation location is improved.

In addition, hexagonal holes 25 are provided at the heads of the valve bodies 25 and 30.
A, 30a are provided, and a hexagonal wrench is inserted into the hexagonal holes 25a, 30a to operate the valve bodies 25, 30.
The dimension L to the tip of the valve can be made smaller than that of conventional valves (operated by holding the valve bodies 6 and 11 with a monkey key), which also reduces the packaging volume during transportation and the installation space. can be achieved.

In addition, the charge port 27 is connected to the gas side valve device 21.
By providing this, the liquid valve device 22 can be further downsized.

Note that the inner diameter of the flow path 29 of the liquid side valve device 22 may be reduced to such an extent that it can also serve as the capillary tube 14, so that the capillary tube 14 may be eliminated or shortened as much as possible.

Further, the tip of the valve body 30 may be made into a needle so that the amount of throttling can be adjusted.

As explained above, the present invention can reduce heat radiation loss in the liquid side valve device, and
Costs can be reduced by making the liquid side valve device smaller and lighter, and by reducing the packaging volume.

[Brief explanation of the drawing]

Fig. 1 is a schematic block diagram showing a split type air conditioner, Figs. 2 to 4 show an embodiment of the present invention, and Fig. 2 is a schematic block diagram showing a split type air conditioner. 3 is a side sectional view showing the gas side valve device, and FIG. 4 is a side sectional view showing the liquid side valve device. 1... Outdoor unit, 4, 5... Liquid pipe, gas pipe (refrigerant pipe), 12... Compressor, 13... Condenser,
14...Capillary tube (pressure reducing device), 15
... Indoor unit, 16 ... Evaporator, 21 ... Gas side valve device, 22 ... Liquid side valve device, 24 ... Channel of gas side valve device, 25 ... Valve body of gas side valve device,
26... Valve seat of the gas side valve device, 29... Channel of the liquid side valve device, 30... Valve body of the liquid side valve device, 31...
Valve seat of liquid side valve device.

Claims (1)

[Scope of utility model registration request] The indoor unit is provided with an evaporator, and the outdoor unit is provided with a compressor, a condenser, a pressure reducing device, a liquid side valve device, and a gas side valve device. An evaporator and the gas side valve device are sequentially connected through refrigerant piping to constitute a refrigeration cycle, and the liquid side valve device and the gas side valve device each have a valve body inside, and the valve body is moved toward and away from a valve seat. In order to open and close the flow path by opening and closing the flow path, and to further reduce the amount of heat radiation, the inner diameter of the portion of the liquid-side valve device that the valve body contacts is made smaller than the inner diameter of the portion that the valve body of the gas-side valve device contacts. and a split-type air conditioner characterized in that the valve body of the liquid side valve device is smaller than the valve body of the gas side valve device, and the outer shape of the liquid side valve device is smaller than the outer shape of the gas side valve device. .