JPS58156163A - Separation type 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 The present invention relates to a heat pump type separate air conditioner in which one outdoor unit is branched to several indoor units via inter-unit piping.

Generally, when connecting unit piping on-site, an air purge is performed to expel the air inside each piping and each indoor unit, but the operation switching solenoid valve installed in each branch pipe performs the air purge. Since this solenoid valve is interposed in the piping, it is necessary to open it during air purge work.For this reason, conventionally, before air purge work, an electric first koji process was performed to electrically open this solenoid valve, or this Attempts have been made to use solenoid valves as energized closed valves that open without energization. However, the former method requires complicated construction, and the latter method cannot be used in gas delivery piping due to excessive pressure loss because the refrigerant flow diameter inside the valve cannot be made larger than that of a normal energized N-type electromagnetic valve. It had drawbacks.

In view of this situation, the present invention has a reversible solenoid valve that is automatically opened by refrigerant pressure during cooling and air purge operations, and opened by energization during heating, with a gas side branch 'IiK*. The purpose is to provide a separate type medium gLI11 Japanese which can easily perform air purge work without energizing when connected to on-site distribution, and which can perform highly efficient multi-room air conditioning operation without any refrigerant pressure loss during cooling or heating. It's a friend.

In order to achieve this object, the configuration of the present invention is to provide a source-side closing valve and a gas-side closing valve in the liquid pipe and gas pipe of the outdoor unit, respectively, and to switch the liquid refrigerant@b to the source-side branch pipe during cooling. A reversible solenoid valve is provided in the gas side branch pipe, which opens when energized during heating and opens when the refrigerant pressure from the source side closing valve opens during air purge.

Below, practical examples of the present invention will be explained based on the drawings.
In the figure, (1) is a compressor, (2) is a four-way valve for switching between cooling and heating channels, (3) is an outdoor heat exchanger, and (4) is connected in parallel with a cooling check valve (5). Heating pressure reducing elements (6a), (6b), and (6c) consisting of capillary tubes are connected to source side branch pipes (7a), respectively.
) (7b) (7c) are energized closed type source side solenoid valves, (8a) (8b) (8c) are heating check valves (9a), respectively.
) (9b) (9C) A cooling pressure reducing element consisting of a capillary tube connected in parallel, (10h5 (10b) (10c) has an external connection port (Ha) (11b) (11c) and is opened and closed by manual operation. Source side closing valve (12 is a gas side closing valve that has an external opening 113 and is opened and closed by manual operation, (14a) (1
4b) and (14c) are waste side branch pipes (15a) and (15), respectively.
b) With the reversible solenoid valve (described later) provided in (15c), these refrigeration-like parts are internally provided in the outdoor unit αe.

(17a) (17b) (17c) are indoor heat exchangers (18
a) Multiple indoor units each incorporating (18b) (18c), (19a) (19b) (19c) and (20
a) (20b) and (20C) are the WL steel and gas side inter-unit piping that connect these two units together on site.

Therefore, the above-mentioned reversible solenoid valves (14a) (14b) (14c
) has the structure shown in Figure 2, and the gas side branch pipe (1
5a) (15b) (15c) and wfj we mouth 4)
and piping between the gas delivery units (20a) (20b) (20
e) and the VI gauze pipe ■ which is connected to #1, a plunger that suctions and moves to the left when the solenoid coil is energized during heating, and moves together with the plunger to open the auxiliary valve port (5). The yomego (to) that opens and this yomego (sha) when heating
Gas side branch pipes (15a) (15b) in a blocked state
The refrigerant pressure from (15c) is applied to the recess @ wall via the pressure equalization passage fin, and the pressure from the main spring (support) is also added to the main valve port (towards the main valve port).
It is equipped with a valve @U that closes the . During cooling and air purge operations, the solenoid coil is de-energized, and the auxiliary valve port (c) is closed by the pressure of the auxiliary spring wire. During air purge work, the refrigerant pressure applied from the connecting pipe ■ side overcomes the main spring (c), pushing valve mu upward and opening the main valve port ■.

Therefore, at the time of manufacture and shipment, the source side closing valve (10a) (1
0b) Ship the outdoor unit with (10c) and the gas side closing valve a2 closed and filled with the specified refrigerant,
Multiple Muroen Units on site) (17a) (17b) (1
7c) to the source side unit pipes (19a) (19b) (1
9c) and gas side inter-unit piping (20aX 20b)
(20c) connects to the outdoor unit ae. After that, operate the source side closing valve (10e, ) (+0b) (10c) and the gas side closing valve port to seal the refrigerant in the outdoor unit 061.
External connection port (lla) (llb) (
11o) and external opening port u3 are opened, and air purge refrigerant cylinders (not shown) are sequentially connected to these external connection ports, the refrigerant in this cylinder is transferred to the source-side unit pipe (11o) and external opening port u3.
9a) (19b) (19c), indoor heat exchanger, exchanger (18
a) (18b) (18c), gas side inter-unit piping (2
0a) (20b) (20c), reversible solenoid valve (lja
) (14b) (14c) as l! Next, these 1 will flow separately.
rj inside the screen and heat exchanger! The air is forced out from the external opening 13 of the gas side closing valve az to perform an air purge operation. During this work, as mentioned above, the reversible solenoid valves (14a) (14b) (1dc) are automatically opened in the de-energized state by the refrigerant pressure, so the source side closing valves (10a) (10b)
) (10, c) and gas side shutoff valve a2. For air purge work, close the external opening U and open both shutoff valves (10a) (10b) (10c) Q2 indoors and outdoors. It ends when the connection is made in the direction.

For air purge work, instead of using the above-mentioned refrigerant cylinder, the sealed refrigerant in the outdoor unit 161 may be used, but in this case, the amount of refrigerant charged must be set somewhat larger for mower purge. be.

Therefore, during cooling operation, for example, indoor units that are not in operation (
If the source side electromagnetic valves (6b) and (6c) of 17b) and 17c are closed by energizing, only the indoor unit) (17a) is connected to the cooling pressure reducing element (8a) and the source side closing valve (10a). The condensed liquid refrigerant flows as shown by the solid line arrow to this indoor heat exchanger (1
8m) and the vaporized gas refrigerant automatically opens the reversible solenoid valve (14a) as described above using its own refrigerant pressure and is returned to the compressor (1) side, and only the indoor unit (17a) is operated for cooling. 1 is performed.

Also, during heating operation, for example, the indoor unit you want to operate) (17
If only the reversible wVB valve (14a) in a) is energized and opened, the gas refrigerant discharged from the pressure WtI machine (1) will flow through the gas side closing valve α2. The source side 'lt magnetic valve (6) in the non-operating open state is passed through the reversible solenoid valve (14a), the indoor heat exchanger (18a), the source side closing valve (10a), and the heating check valve (9a).
8) and flows to the outdoor heat exchanger (3) side, and only the indoor unit (17a) is operated in FIIiM mode.

In addition, the above-mentioned heating and cooling operation is performed using the source-side Denken valves (6a) (6b) (
6c) and reversible solenoid valves (14a) (14'b) (14c
) It goes without saying that two K machines can be operated simultaneously by operating the K machines as appropriate.

As described above, the present invention provides a reversible magnetic valve in the gas side branch pipe, which is automatically opened by refrigerant pressure during cooling operation and air purge work, and opened by energization during heating operation. When connecting to on-site piping, air purge work can be easily performed without the need for air wiring, and an energized open type reversible corner valve is used, which is suitable for passing gas refrigerant with a large specific response volume without pressure loss. So,
It is extremely useful in that it can demonstrate its cooling and heating capabilities by circulating an appropriate amount of refrigerant during both cooling and heating operations.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 shows the refrigerant lP.
Figure J and Figure 2 are cross-sectional views of reversible solenoid valves. (11... Compressor, (2)... Four-way valve, (3)...
・Outdoor heat exchanger, (6a) (6b) (6e)-'l side solenoid valve, (7a) (7b) (7c)--Liquid branch pipe, (I
Da) (10b) (10c) - Source side closed #in'a -...
Gas side closing valve, (+4a) (14b) (14c) - Reversible solenoid valve, N5a) (15b) (15cl... Gas side branch pipe, (161... Outdoor unit, (17a) (17b)
)(17c)...indoor unit), (18a)(+
8b) (18c) - indoor heat exchanger, (19a) (19b
) (+9c) (20a) (20b) (200) - Unit piping 0 Fig. 2

Claims (1)

[Claims] (1) A heat pump type separated air system consisting of an outdoor unit equipped with a compressor, a four-way valve, and an outdoor heat exchanger, and multiple indoor units equipped with indoor heat exchangers that are branched and connected via inter-unit piping.゛In the air conditioner, the liquid pipe and gas pipe of the outdoor unit are provided with a source-side closing valve and a gas-side closing valve, respectively, and a source-side solenoid valve is provided in the source-side branch pipe for switching the flow of liquid refrigerant during cooling. A separate air conditioner characterized in that a reversible solenoid valve is provided in the gas side branch pipe, which opens when energized during heating and opens when the refrigerant pressure from the pre-distribution side closing valve during air purge occurs.