CN100412455C

CN100412455C - Sub air conditioner heating starting and controlling method for concatenate air conditioner

Info

Publication number: CN100412455C
Application number: CNB2005100027448A
Authority: CN
Inventors: 张晓兰; 毛守博; 禚百田; 卢大海; 何建奇; 王莉
Original assignee: Haier Group Corp; Qingdao Haier Air Conditioning Electric Co Ltd
Current assignee: Haier Group Corp; Qingdao Haier Air Conditioning Electric Co Ltd
Priority date: 2005-01-26
Filing date: 2005-01-26
Publication date: 2008-08-20
Anticipated expiration: 2025-01-26
Also published as: CN1811294A

Abstract

The present invention discloses a method for the heating, the start-up and the control of a sub machine of an on-line air conditioner, which comprises the steps that when a sub machine needs to be started, coolant in the sub machine is heated; a compressor of the sub machine is switched on and operates for heating, wherein that the coolant in the sub machine is heated specifically relates to the fact that when the frequency of a host machine is low, signals are sent to close a four-way valve of the sub machine; the coolant enters a gas liquid separator of the sub machine from gas discharged by the host machine of the on-line air conditioner or other running sub machines. The present invention has the advantage that liquid in the gas liquid separator of the sub machine can be vaporized into gas, which prevents the sub machine from sucking in a large quantity of liquid during the start-up stage and ensures the normal operation of a system.

Description

The handset of multi-gang air-conditioner device heats the start-up control method

Technical field

The present invention relates to multi-gang air-conditioner device technical field, the handset that particularly relates to a kind of multi-gang air-conditioner device heats the start-up control method.

Background technology

Various large-scale offices and commercial facility and high-end residential villa all require to be equipped with the unified intelligent central air-conditioning that designs.Because the control model that the room quantity of the indoor apparatus of air conditioner that uses is more, careat is big and need unitize, thereby at the variation that has house type now, for satisfying the indoor temperature demand substantially, existing central air-conditioning all disposes the outdoor unit that comprises multiple compressors.

In the outdoor unit of present multi-joint machine multi-split air conditioner, off-premises station generally is made of a main frame, 2～4 handset parallel connections.This system can surpass coupling, and the indoor set total capacity can reach 135% of off-premises station total capacity, and is that have even more, and handset is according to definite openings such as total load of indoor set.

In the practical application, because under more most situation, the ability need of indoor set is less than the maximum capacity of off-premises station, so just formed the surplus of off-premises station ability.Therefore, the handset standard-sized sheet not all according to load, but choose suitable handset participation work.

In the prior art, it generally is that the cross valve of main frame and handset powers on simultaneously that the handset of traditional multi-gang air-conditioner device heats the start-up control method, follow-up running handset determines whether to close according to total load of indoor set etc., the cross valve of the handset of closing still keeps energising, like this can be in handset pipeline of in heating process, not holding for a long time and the gas-liquid separator before the compressor because a variety of causes accumulates a large amount of refrigerants, when if load reaches certain degree and need open this handset, suck a large amount of liquid when then very easily causing this handset start, damage compressor.

In view of this, need play protection network one, guarantee the normal use of compressor and the normal operation of system for heating of handset starts structure.

Summary of the invention

The technical problem that the present invention solves is to provide a kind of handset of multi-gang air-conditioner device to heat the start-up control method, can heat when starting in handset to avoid compressor to suck liquid, guarantees the normal operation of system.

For this reason, the technical scheme of technical solution problem of the present invention is: provide a kind of handset of multi-gang air-conditioner device to heat the start-up control method, comprise step:

1) when handset need start, the refrigerant of heating handset inside;

2) compressor of the aforementioned handset of unlatching enters and heats running.

Preferably, the refrigerant of the heating handset inside of described step 1) specifically: close the cross valve of this handset, the gas of discharging from described multi-gang air-conditioner device enters the gas-liquid separator of this handset.

Preferably, described cross valve of closing handset is specifically posted a letter when reducing to low frequency by main frame and is realized.

Preferably, described step 2) in, the cross valve of this handset powers on when opening compressor.

Preferably, described step 1) comprises that also main frame determines the unlatching of handset according to the total load of indoor set or cut out.

With respect to prior art, the invention has the beneficial effects as follows: because heating in the operation process at the multi-gang air-conditioner device if handset starts, then heat the refrigerant of handset inside, like this, liquid in the gas-liquid separator will flash to gas, and then open the compressor of handset, thus avoided the handset start-up phase can suck big quantity of fluid, guaranteed the normal operation of system.

In preferred version of the present invention, in the operation process, main frame is posted a letter when reducing to low frequency and is turned off the cross valve of this handset.After cross valve is closed, heat running because main frame or other handsets of moving are still, the high temperature and high pressure gas of discharging from main frame or other handsets of moving will flow into gas-liquid separator through cross valve S end from the tracheae stop valve of this handset like this.Like this, the liquid in the gas-liquid separator will flash to gas, has avoided the handset start-up phase can suck big quantity of fluid, has guaranteed the normal operation of system.

Description of drawings

Fig. 1 is a structural representation of using a kind of multi-gang air-conditioner device of the inventive method;

Fig. 2 is the flow chart that the handset of multi-gang air-conditioner device of the present invention heats the start-up control method;

Fig. 3 is the schematic diagram of an embodiment of the inventive method.

The specific embodiment

See also Fig. 1, the multi-gang air-conditioner device comprises main frame 100 and a plurality of handset 200 (only showing one among the figure) in parallel.Be connected with 320 by pipeline 310 between main frame 100 and the handset 200.

Described handset 200 comprises tracheae stop valve 210, cross valve 4WV, check valve 220, oil eliminator 230, capillary 240, gas-liquid separator 250, condenser 260, electric expansion valve 270, reservoir 280, liquid pipe stop valve 290, sensor 201, high-voltage switch gear Hs, low tension switch Ls.

Wherein, cross valve comprises port e, c, d, s.

Check valve 220 is arranged on the blast pipe of handset 200, is used to prevent from the cold-producing medium of blast pipe outflow and the backflow of lubricating oil.

Oil eliminator 230 is arranged on the blast pipe of handset 200, can be back in the muffler (not indicating) by capillary 240 by oil eliminator 230 isolated lubricating oil.

See also Fig. 2, below the handset of multi-gang air-conditioner device of the present invention heat the flow process of start-up control method.

Step S110, the multi-gang air-conditioner device heats startup, and the cross valve of main frame and handset powers on simultaneously.

Step S120 determines whether to close handset according to total load of indoor set etc.The cross valve of the handset of closing still keeps energising.

Step S130, main frame have judged whether that handset needs to start, if then enter step S140; If not, then normally operation.

Step S140 signals when main frame is reduced to low frequency and turns off the cross valve of this handset.

Compressor suffers liquid hammer when starting once more for anti-handset heats, and main frame signals when reducing to low frequency and turns off the cross valve of this handset detecting need open a certain handset the time.Then in this handset starts for the previous period, because the cross valve outage, the high temperature and high pressure gas of discharging from main frame or other handsets of moving will flow into the gas-liquid separator of this handset.Like this, the liquid in the gas-liquid separator will flash to gas.

Step S150, after after a while, this handset compressor start, cross valve powers on simultaneously.

Owing to the liquid in the gas-liquid separator will be flashed to gas before this, thereby avoid compressor start to suck the possibility of liquid.

Consulting Fig. 3 clearly, is the signal that the handset of one embodiment of the present of invention heats the start-up control process.

Among this embodiment, off-premises station comprises main frame and handset 1, handset 2.Handset 1 and handset 2 include cross valve 4WV.

In the initial launch stage, determine to open handset 1, close handset 2 according to the total load of indoor set.The cross valve of the cross valve of handset 1 and the handset of closing 2 keeps energising.

Subsequently, main frame detects handset 2 to be needed to start, and compressor suffers liquid hammer when starting once more for anti-handset heats, and signals when main frame is reduced to low frequency and turns off the cross valve of this handset 2.After after a while, the compressor start of this handset 2, its inner cross valve powers on simultaneously.

In this handset 2 starts for the previous period, because the cross valve outage, will flow into the gas-liquid separator (with reference to figure 1) of handset 2 from the high temperature and high pressure gas of main frame and handset 1 discharge that moving.Like this, the liquid in the gas-liquid separator will flash to gas.Owing to the liquid in the gas-liquid separator is flashed to gas, thereby has avoided compressor start to suck the possibility of liquid.

In sum, in the method for the present invention, if handset starts, main frame is posted a letter when reducing to low frequency and is turned off the cross valve of this handset in the operation process.After cross valve is closed, heat running because main frame or other handsets of moving are still, the high temperature and high pressure gas of discharging from main frame or other handsets of moving will flow into gas-liquid separator through cross valve S end from the tracheae stop valve of this handset like this.Like this, the liquid in the gas-liquid separator will flash to gas, has avoided the handset start-up phase can suck big quantity of fluid, has guaranteed the normal operation of system.After after a while, cross valve powered on when compressor was opened, and system enters and normally heats running.

The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims

1. the handset of a multi-gang air-conditioner device heats the start-up control method, it is characterized in that, comprises step:

1) when handset need start, the gas of discharging from main frame or other handsets of moving enters the gas-liquid separator of this handset, the refrigerant of heating handset inside;

2. the handset of multi-gang air-conditioner device as claimed in claim 1 heats the start-up control method, it is characterized in that the gas-liquid separator that the gas of discharging from main frame or other handsets of moving in the described step 1) enters this handset is to realize by the cross valve of cutting out this handset.

3. the handset of multi-gang air-conditioner device as claimed in claim 2 heats the start-up control method, it is characterized in that: described cross valve of closing handset is specifically posted a letter when reducing to low frequency by main frame and is realized.

4. the handset as each described multi-gang air-conditioner device of claim 1 to 3 heats the start-up control method, it is characterized in that: described step 2), the cross valve of this handset powers on when opening compressor.

5. the handset of multi-gang air-conditioner device as claimed in claim 4 heats the start-up control method, it is characterized in that: described step 1) comprises that also main frame determines the unlatching of handset according to the total load of indoor set or cut out.