JPS58195758A - Control system 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 [Technical Field of the Invention] The present invention relates to a control system for a multi-type air conditioner equipped with a heat pump type refrigeration cycle, and particularly capable of air conditioning multiple units.

[Technical background of the invention]

Conventionally, in an air conditioner equipped with a heat pump type refrigeration cycle, when the outdoor heat exchanger is turned on during heating, or when the preset defrosting timing is reached, the four-way valve is switched to remove the refrigeration cycle from the heating cycle. The system shifts to the cooling cycle, and defrosts the outdoor heat exchanger.

[Background technique #rQ1 interlayer point] However, since this defrosting operation lasts about 8 to 10 minutes, the indoor temperature drops to 8°C to 10°C during this time.
There was a problem of causing discomfort to people in the room. [Object of the Invention] This invention was made in view of the above circumstances, and the seventh object is to reduce the indoor temperature by defrosting operation. An object of the present invention is to provide a control system for an air ballast machine that can reduce the temperature of the air, speed up the rise in indoor temperature when heating is resumed, and enable comfortable air conditioning.

[Summary of the invention]

This invention provides a multi-type system that provides cooling or heating of a desired room by arranging a plurality of indoor heat exchangers and controlling the opening and closing of refrigerant flow passages for each of the indoor heat exchangers. When an air conditioner enters defrosting operation during heating, it closes the refrigerant flow path to the indoor heat exchanger in the room that is being heated, and acts against the indoor heat exchanger in the room that is not heating. If the refrigerant flow opens the passage and is heating 4 = % of all wealth ■ Priority 0
expensive-? closing a refrigerant flow path to the internal heat exchanger;
In addition, the refrigerant flow path V for the indoor heat exchanger in the lower priority room is opened.

[Example of the development of the invention] Hereinafter, an example of the practical application of this invention will be explained with reference to the drawings.

In the IJl1 diagram, 1.2 denotes the first and 182 compressors having different capacities, which are connected in parallel via a check valve 3.4. However, the compressor l.

2 parallel circuit, four-way valve 5, outdoor heat exchanger 6, check valve 7 and liquid receiving tank 1 in series circuit, this series circuit E parallel C 2 connected heating P# Zhangxu 9, first refrigerant control solenoid valve 10,
A parallel body of the cooling expansion valve 11 and the check valve 12, and a first
A series circuit of the indoor heat exchanger 13, W in parallel to this series circuit
t-connected II2 refrigerant control 11i-cell 20, a parallel body of the cooling expansion valve 11 and the check valve 22, and the second silkworm,...
i. The series circuits of the heat exchanger 23 etc. are connected sequentially, :・(1
1 Heat bomb and refrigeration cycle are formed.

"'II:', 1 And a release cycle 33 is formed between the compression chamber of the first compressor l and the refrigerant suction port via the capillary tube 31 and the electromagnetic valve 37+'. Second compression @2
A release cycle J6 is formed between the compression chamber and the refrigerant suction port via a capillary duplex 34 and a solenoid valve 35. Furthermore, a capillary tube 3'1l is installed between the inside of the liquid receiving tank 8 and each compression chamber with a ratio of 17181°2.
An indie crayon cycle 38 is formed through the k-. In addition, the cooling expansion valve 11 and the first indoor heat exchanger 13
A bypass cycle 41 is formed via a capillary tube 3# and a check valve 40 between the mutual communication portion of the compressor 1 and each compression chamber of the compressor 1. A bypass cycle 44 is formed between the cooling valve 21 and the s2 internal heat exchanger 23 and each pressure of the compressor 1. be done.

Note that the first indoor heating unit 11, together with its peripheral equipment and indoor air blower m (not shown), etc. (not shown) constitutes a second unit, and is given priority in the heating factory. It is installed at a lower BN than the room A above.

Next, the operation of the above-described configuration (2) will be explained while referring to the time chart 11 in FIG. 182.

First, when heating only the A island, the second pressure IM machine 2 is operated, the four-way valve 5 is switched, and the refrigerant control ill solenoid valve 10 is opened. In this way, a heating cycle is formed via the indoor heat exchanger 13, and hH heating is performed.

When the snack box of the outdoor heat exchanger 6 advances and a defrosting command is issued, or when the defrosting timing comes, the four-way valve I returns to form a cooling cycle, and the defrosting operation for the outdoor heat exchanger 6 is performed. is started 1. At this time, at the same time as the four-way valve 5U) returns, the cooling line control solenoid valve lO closes, and the refrigerant control solenoid valve 20 opens, and the refrigerant does not flow through the first indoor heat converter lJ, but instead enters the second Tominouchi heat converter lJ. It flows through the exchanger 23. Therefore, the temperature drop inside Ag can be reduced.

When the defrosting of the outdoor heat exchanger 6 is completed and a defrosting release command is issued, or when the defrosting timing ends, the four-way valve 5 is switched into operation T, and the refrigerant control solenoid valve IO is opened.
And the refrigerant control solenoid valve 20 is closed, and the indoor heat exchanger 11v
A heating cycle is formed through this. In this way, ATji
Heating will be resumed. In this case, in Q) when the indoor heat exchanger 13 is not completely cooled, the indoor temperature can be rapidly increased.

When carrying out the A and B rich 111 chambers, the first and second compressors 1.1 are operated, the four-way valve 5 is switched, and the refrigerant control solenoid valve JO is operated.

20 are both open. Thus, the indoor heat exchanger 13.2
A heating cycle is formed through 3, and the heating of A, Bfi? r. Therefore, the outdoor heat exchanger 6:1
When 1Ii progresses and a defrosting command is issued, or when the defrosting timing is reached, the four-way valve 5 returns to □, a cooling cycle is formed, and the defrosting operation for the outdoor heat exchanger 11 6 is started. . At this time 1,
・°::jI Simultaneously with the return of the four-way valve 5, the refrigerant control solenoid valve 111E corresponding to room A, which has a higher priority, closes, and the refrigerant control solenoid valve 111E, which corresponds to room B, which has a lower priority, closes. go is open I
Maintain Bv. In other words, the refrigerant is in the first M internal heat exchanger rJv
15u flows through the second indoor heat exchanger ZSv. Therefore,
Even if the temperature in room B drops, the temperature drop in room A, which has higher priority, can be reduced instead. When the defrosting of the outdoor heat exchanger 6 is completed and a defrosting release command is issued, or when the defrosting timing ends, the four-way valve 5 is switched and the refrigerant control solenoid valves 10 and 20 are both opened. A heating cycle is formed via the indoor heat exchangers I J , J Jv. In this way, heating of rooms A and B is restarted. In this case, since the indoor heat exchanger 13 is not cold, the temperature in the A room can be rapidly raised by -F.

In addition, in the above practical example, two indoor heat exchangers are provided, and two
Although we have described the case where an electric air space mv is provided, the same can be applied to a case where an indoor heat exchanger is provided (8 or 4') and an even larger number i of air space W4 is carried out in the row 1. In addition, in the above embodiment, the rust conduction motors of compressors f and j are of an inverter bite type, and a capacity variable function is added, so that the compression function force during defrosting operation can be made larger than during normal operation. This can shorten the defrosting time.

In addition, the present invention is not limited to the above-mentioned practical example, and it goes without saying that it can be modified and reproduced in various ways without changing the gist.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to reduce the low Ff of the indoor temperature due to the 1M operation, and also to accelerate the rise of the indoor temperature when the heating is restarted, allowing comfortable air conditioning. It can provide a control method for the harmonizer.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic diagram of a heat pump type refrigerant cycle, and FIG. 2 is a time chart for explaining the operation. l...first compressor, 2...second compressor, 6...outdoor heat exchanger, 10...first refrigerant control solenoid valve, I3...
・First indoor heat exchanger, 20...Second refrigerant control! 11[
Magnetic valve, jl...Second blind heat exchanger.

Claims (1)

[Claims] A heat pump refrigeration cycle in which a compressor, a four-way valve, an outdoor heat exchanger *a, and a plurality of indoor heat exchangers connected in parallel are connected in sequence, and a refrigerant flow path for each of the indoor heat exchangers. each indoor heat exchanger described in 1liI is arranged in a plurality of stations, and the refrigerant flow path for each indoor heat exchanger is opened and closed by each refrigerant control valve. In an air-conditioning machine that enables the desired amount of cooling or heating by controlling, when defrosting operation is started during heating, priority is given to the room being heated or the room being heated. Closing the refrigerant flow path to the indoor heat exchanger of a room with a higher priority, and opening the refrigerant flow path to the indoor heat exchanger of a room with a lower priority even if there is no heating or one heating operation is being performed. An air conditioner control system featuring: