KR20080016760A - Multi air conditioner - Google Patents

Abstract

According to the present invention, at least one outdoor unit and a plurality of indoor units are connected by a distributor, and further, a bypass means for correcting the pressure by bypassing the stop refrigerant and the flow refrigerant when the refrigerant collides with the cooling / heating switching is provided. It relates to a multi-type air conditioner.

The multi-type air conditioner according to the present invention is provided between at least one outdoor unit 100, at least one indoor unit 200 composed of cycles corresponding to the outdoor unit 100, and between the indoor unit 200 and the outdoor unit 100. In the air conditioner is provided with a distributor 300 for controlling the flow of the refrigerant; One side of the distributor 300 corrects the pressure difference of the refrigerant by bypassing the refrigerant when the refrigerant stopped before the cooling / heating switching of the indoor unit 200 and the refrigerant flowing after the cooling / heating switching collide with each other. Refrigerant bypass means (370) is characterized in that it is provided, both ends of the refrigerant bypass means 370 is installed in communication with the low-pressure connection pipe 324 and the indoor connection engine 212 ". According to the present invention, there is an advantage that the noise generated due to the pressure difference of the refrigerant during a plurality of cooling / heating switching is reduced.

Description

Multi Air Conditioner {Multi-airconditioner}

1 is a schematic configuration diagram of a conventional multi-type air conditioner.

Figure 2 is a block diagram showing the configuration of the conventional multi-type air conditioner and the refrigerant flow.

Figure 3 is a schematic diagram of a multi-type air conditioner according to the present invention.

Figure 4 is a block diagram of a preferred embodiment of a multi-type air conditioner according to the present invention.

5 is an external perspective view of an outdoor unit constituting a preferred embodiment of the multi-type air conditioner according to the present invention;

Figure 6 is an exploded perspective view showing the internal configuration of the outdoor unit constituting a preferred embodiment of the multi-type air conditioner according to the present invention.

7 is a configuration diagram of an outdoor unit constituting a preferred embodiment of the multi-type air conditioner according to the present invention.

8A is an external perspective view of a distributor constituting a preferred embodiment of the multi-type air conditioner according to the present invention;

Figure 8b is an exploded perspective view showing the internal configuration of the distributor constituting a preferred embodiment of the multi-type air conditioner according to the present invention.

9 is a block diagram of a distributor constituting a preferred embodiment of the multi-type air conditioner according to the present invention.

10 is a view showing the operation of the refrigerant flow during the cooling and discharge chamber operation of the multi-type air conditioner according to the present invention.

11 is an operation configuration showing the refrigerant flow during the operation of the cooling main body of the multi-type air conditioner according to the present invention.

12 is an operation configuration showing the refrigerant flow during the heating operation of the multi-type air conditioner according to the present invention.

13 is a view showing the operation of the refrigerant flow during the operation of the heating main body of the multi-type air conditioner according to the present invention.

Explanation of symbols on the main parts of the drawings

100. Outdoor unit 102. Outdoor solenoid valve

110. Base Fan 112. Front Panel

114. Front Grill 116. Front Upper Bracket

120. Constant speed compressor 120 '. Inverter Compressor

122. Oil separator 124. Four-way valve

126. Valve Support 128. Service Valve

130. Outdoor Supercoolers 132. Accumulators

134,134 '. Front frame 136. Center frame

140. Left control box 140 '. Right control box

142. Voltage Transformers

146. Heating element plate 146 '. Heat dissipation

148. Heat Sink Fan 150. Barrier

152. Air Guide 154. Air Guide Cover

160. Top panel 162. Ventilation

164. Shroud 166. Discharge Grill

170. Blowing fan 172. Fan motor

174. Motor Mount 180. Outdoor Heat Exchanger

182. Front heat exchanger 184. Rear heat exchanger

186. Drain pan 188. Side panel

190. Rear Grill 192. Rear Panel

194. Rear upper bracket 196. Rear frame

198. Air conditioning piping 198 '. Cooling valve

200. Indoor unit 202. Indoor heat exchanger

204. Expansion valve 210. Liquid pipe

210 '. Indoor liquid pipe 210 ". Indoor liquid pipe

212. Low pressure engine 212 '. Indoor organ

212 ". Indoor Connection 214. High Pressure Engine

300. Splitter 310. Splitter Case

315. Dispenser cover 320. Liquid connector

322. High Pressure Connector 324. Low Pressure Connector

330. Main valve 332. Auxiliary valve

340. Branch pipe 350. Simultaneous supercooler

352. Bypass pipe 354. Supercooling control valve

360. Condensate removal means 370. Refrigerant bypass means

372. Refrigerant bypass tube 374. Refrigerant bypass valve

The present invention relates to a multi-type air conditioner, and more particularly, at least one or more outdoor units and a plurality of indoor units are connected by a distributor, and inside the distributor, by cooling / heating switching, the stop refrigerant and the flow refrigerant are bypassed in a collision. It relates to a multi-type air conditioner is further provided with a bypass means for correcting.

In general, an air conditioner is a cooling / heating system that cools a room by a repetitive action of inhaling hot air in a room, exchanging heat with a low temperature refrigerant, and then discharging it into the room. -Condenser-Expansion valve-Evaporator which forms a series of cycles.

Recently, in addition to heating and cooling, there are various additional functions such as the air purifying function that inhales and filters contaminated air in the room and makes it into clean air and reinjects it into the room, and the dehumidification function of making humid air into wet and dry air again. It also functions.

Meanwhile, as is well known, an air conditioner may be classified into a separate type air conditioner in which an outdoor unit and an indoor unit are separately installed, and an integrated air conditioner in which the outdoor unit and the indoor unit are integrally installed.

Recently, multi-type air conditioners have been released that can be effectively applied when two or more air conditioners are installed in a home or when an air conditioner is installed in each office in a building having several offices. This multi-type air conditioner is connected to a plurality of indoor units in one outdoor unit, it is possible to obtain the same effect as installing a plurality of separate air conditioner.

1 is a schematic view showing a conventional multi-type air conditioner installation state, and FIG. 2 is a block diagram showing a configuration of a conventional multi-type air conditioner and a flow of a refrigerant. Referring to this, the outdoor unit 1 includes a compressor 10, an accumulator 20, an outdoor heat exchanger 30, and the like, and the indoor unit 50 includes an indoor heat exchanger 60 and an expansion valve 70.

In the multi-type air conditioner, a plurality of indoor units 50 are connected to one outdoor unit 1, and a high pressure pipe 80 having a high pressure and a relatively low pressure are connected between the outdoor unit 1 and the indoor unit 50. The low pressure pipes 90 are respectively connected.

When the air conditioner of the configuration described above performs the cooling action, the outdoor heat exchanger 30 of the outdoor unit 1 serves as a condenser to condense the high-temperature / high pressure gaseous refrigerant fed from the compressor 10. The refrigerant condensed as described above is expanded to a low-temperature / low-pressure gas while passing through the expansion valve 70 and is sent to the indoor heat exchanger 60.

The refrigerant introduced into the indoor heat exchanger 60 is converted into a two-phase refrigerant in which gaseous and liquid states of low temperature / low pressure are mixed as heat is exchanged with indoor air. After the refrigerant passes through the accumulator 20, the refrigerant is sent back to the compressor 10 to form one cycle of the refrigerant.

Next, when the air conditioner performs the heating operation, the flow of the refrigerant and the action of the heat exchanger are reversed. That is, the refrigerant compressed by the compressor 10 flows in the order of the accumulator 20-> indoor heat exchanger 60-> expansion valve 70-> outdoor heat exchanger 30.

At this time, the indoor heat exchanger 60 serves as a condenser for heat exchange between the high temperature and high pressure refrigerant passing through the inside and the indoor air, and the outdoor heat exchanger 30 heat exchanges the low temperature low pressure refrigerant and the outdoor air therein. It acts as an evaporator.

However, the prior art as described above has the following problems.

In the multi-type air conditioner as described above, although a plurality of indoor units 50 are connected to the outdoor unit 1, the entire indoor units 50 operate by heating or cooling. That is, some indoor unit 50 is operated by cooling, and the other indoor unit 50 is operated for heating, such as simultaneous cooling and heating is not possible.

For example, a building such as a building is provided with various types of rooms such as a laboratory, a computer room, and an office, and each of these rooms has different characteristics. That is, it is preferable that the computer room is generally kept in a low temperature state, and the office, etc., needs to maintain an appropriate temperature for easy operation. Therefore, the computer room needs to operate an air conditioner by cooling and the office by heating. In technology, such individual operation is difficult.

Accordingly, an object of the present invention is to provide a multi-type air conditioner in which the flow of working fluid is controlled by a distributor provided between an outdoor unit and an indoor unit.

Another object of the present invention, at least one outdoor unit and a plurality of indoor units are connected by a distributor, the inside of the distributor by the cooling / heating switching by the bypass of the stationary refrigerant and the flow refrigerant when the collision to compensate for the bypass (迂回) Means are further provided to provide a multi-type air conditioner in which noise is reduced.

Multi-type air conditioner according to the present invention for achieving the above object is provided between at least one outdoor unit, at least one indoor unit composed of cycles corresponding to the outdoor unit, and between the indoor unit and the outdoor unit to control the flow of the refrigerant An air conditioner having a distributor; On one side of the distributor, the high / low pressure refrigerant stopped before the cooling / heating switching of the indoor unit and the low / high pressure refrigerant flowing after the cooling / heating switching bypass the refrigerant when they collide with each other to correct the pressure difference of the refrigerant. Refrigerant bypass means is provided.

The outdoor unit may be connected to a high pressure engine and a low pressure engine serving as a flow path of the gas refrigerant, and one end of the liquid pipe serving as the flow path of the liquid refrigerant.

The indoor unit is characterized in that the indoor engine that is the flow passage of the gas refrigerant and one end of the indoor liquid pipe that is the flow passage of the liquid refrigerant is connected.

The distributor, characterized in that the high-pressure connection pipe and the low-pressure connection pipe and the low-pressure connection pipe and the liquid connection pipe, respectively, the high-pressure connection pipe and the low-pressure connection pipe and the liquid connection pipe, and the indoor connection and the indoor connection pipe and the indoor connection pipe and the liquid connection pipe, respectively. It is done.

Both side ends of the refrigerant bypass means are installed in communication with the low pressure connection pipe and the indoor connection engine.

The distributor includes a main valve for selectively opening and closing the indoor connection engine, and a branch pipe having one end communicating with the high pressure connection pipe and the other end communicating with the indoor connection engine, and one side of the branch pipe is configured to cool and heat the indoor unit. It is characterized in that the auxiliary valve for controlling the refrigerant flow by selectively opening and closing the branch pipe according to the mode.

The indoor connection engine and the indoor connection liquid pipe are characterized in that a plurality is provided.

The high pressure connection pipe and the low pressure connection pipe and the liquid connection pipe is characterized in that a plurality is provided.

The main valve and the auxiliary valve of the distributor are each opened and closed differently to control the flow of the refrigerant.

The refrigerant bypass means may include a refrigerant bypass tube having one end communicating with the low pressure connection pipe and the other end communicating with an indoor connection engine, and a refrigerant bypass valve for selectively opening and closing the refrigerant bypass pipe.

The refrigerant bypass valve is characterized in that the indoor unit is opened when operating in the heating mode.

The refrigerant bypass valve is characterized in that the opening and closing the same as the auxiliary valve.

According to the multi-type air conditioner according to the present invention having such a configuration, it is possible to simultaneously cool and heat a single air conditioner system, and to easily install a plurality of indoor units and outdoor units.

Hereinafter, exemplary embodiments of the present invention as described above will be described in detail with reference to the accompanying drawings.

FIG. 3 schematically shows an installation state of the multi-type air conditioner according to the present invention, and FIG. 4 is a block diagram of the multi-type air conditioner according to the present invention.

As shown, the multi-type air conditioner is provided with at least one or more outdoor units 100, a plurality of indoor units 200, and a distributor 300 installed between the outdoor units 100 and the indoor units 200 to control the flow of the refrigerant. It consists of.

The outdoor unit 100 is generally installed outdoors of a building, and includes a constant speed compressor 120, an inverter compressor 120 ′, an accumulator 132, an outdoor heat exchanger 180, and an outdoor solenoid valve 102 (LEV: linear). expansion valve, hereinafter referred to as 'outdoor LEV').

And the indoor unit 200 is generally installed in the interior of the building to discharge the air directly to the space for air conditioning, the indoor heat exchanger 202, expansion valve 204 and the like are provided respectively.

Between the outdoor unit 100 and the distributor 300, a liquid pipe 210 which is a single pipe through which liquid refrigerant flows, a high pressure engine 214 through which a high pressure gas refrigerant flows, and a low pressure engine 212 through which a low pressure gas refrigerant flows It is installed in communication.

The indoor unit 200 includes an indoor liquid pipe 210 'through which liquid refrigerant flows, and an indoor engine 212' through which gas refrigerant flows, and the indoor liquid pipe 210 'and the indoor engine 212' are respectively connected to the liquid pipe. 210 is installed to communicate with the high pressure engine 214 and the low pressure engine (212).

In addition, the plurality of indoor units 200 as described above may be installed in different types and characteristics, and accordingly, the indoor liquid pipe 210 'and the indoor engine 212' may be installed according to the capacity of the indoor unit 200 connected thereto. The diameters are different from each other.

That is, the indoor unit 200 includes a first indoor unit 200a, a second indoor unit 200b, a third indoor unit 200c, and a fourth indoor unit 200d. Each indoor unit 200 includes a first indoor unit. 212'a, 2nd indoor engine 212'b, 3rd indoor engine 212'c, 4th indoor engine 212'd, 1st indoor liquid pipe 210'a, 2nd indoor The liquid pipe 210'b, the third indoor liquid pipe 210'c, and the fourth indoor liquid pipe 210'd are connected to each other to guide the flow of the refrigerant, and each indoor unit 200 and the indoor liquid pipe 210 ' ) And the indoor engine 212 ′ may be configured differently in size and capacity.

Meanwhile, each expansion valve 204 provided in the indoor unit 200 controls the refrigerant flowing into each indoor heat exchanger 202. That is, the first indoor heat exchanger 202a and the first expansion valve 204a are provided in the first indoor chamber 200a, and the second indoor heat exchanger 202b and the second expansion valve are provided in the second indoor chamber 200b. 204b, a third indoor heat exchanger 202c and a third expansion valve 204c are provided in the third indoor chamber 200c, and a fourth indoor heat exchanger 202d in the fourth indoor chamber 200d. ) And a fourth expansion valve 204d. Therefore, each of the expansion valve 204 is controlled differently according to the user's selection, and adjusts the flow rate of the refrigerant flowing into the indoor heat exchanger (202).

5 to 7 illustrate a configuration of a multi-type air conditioner according to the present invention. As shown in these figures, a base fan 110 forming a bottom surface is provided at the bottom to support a plurality of parts, and the front panel 112 forming a front lower exterior at the tip of the base fan 110. ) Is provided.

The front grill 114 is installed above the front panel 112. Therefore, the outside air is sucked through the front grill 114, and passes through the outdoor heat exchanger 180 to be described below. On the other hand, the upper front bracket 116 is further installed on the upper side of the front grill 114, the front end bracket 116 is fastened to the front end of the motor mount 174 to be described below.

Compressors 120 and 120 'are installed on an upper surface of the base fan 110. The compressors 120 and 120 'are configured to compress the refrigerant to be high temperature and high pressure, and are provided at left and right sides, respectively. That is, a relatively constant speed compressor 120 for constant speed operation is installed on the right side, and an inverter compressor 120 ', which is a variable speed heat pump, is installed on the left side.

A refrigerant injector 120a is installed at the inlet side of the compressors 120 and 120 '. The refrigerant injector 120a prevents the compressor from being burned by supplying a refrigerant when the compressors 120 and 120 'are overheated according to operating conditions. The refrigerant used herein is an outdoor heat exchanger 180 to be described below. It is preferred that the refrigerant discharged from is configured to be used.

A constant oil compressor 121 is installed between the constant speed compressor 120 and the inverter compressor 120 'such that the constant speed compressor 120 and the inverter compressor 120' communicate with each other. Therefore, when oil supply shortage occurs in one of the compressors, the compressor 120 is replenished from the other compressor to prevent burnout of the compressors 120 and 120 'due to the insufficient flow rate.

As the compressors 120 and 120 ', a low noise and excellent scroll compressor is used. In particular, the inverter compressor 120' is an inverter scroll compressor whose rotation speed is adjusted according to the load capacity. Therefore, when a small number of indoor units 200 are used and the load capacity is small, the inverter compressor 120 'is operated first, and the constant speed compressor is not available when the load capacity is gradually increased and cannot be handled by the inverter compressor 120'. 120 is activated.

At the outlet side of the constant speed compressor 120 and the inverter compressor 120 ', the compressor discharge temperature sensors 120b and 120'b and the oil separator 122 respectively measure the temperature of the refrigerant discharged from the compressors 120 and 120'. do. The oil separator 122 filters the oil mixed in the refrigerant discharged from the compressors 120 and 120 'to be recovered to the compressors 120 and 120'.

That is, oil used to cool frictional heat generated when the compressors 120 and 120 'are driven is discharged to the outlet of the compressors 120 and 120' together with a refrigerant. The oil in the refrigerant is separated into the oil separator 122. Separated from and sent back to the compressor (120, 120 ') through the oil return pipe (123).

In addition, a check valve 122 ′ is further installed at an outlet side of the oil separator 122 to prevent a backflow of the refrigerant. That is, when only one of the constant speed compressor 120 or the inverter compressor 120 'is operated, the compressed refrigerant is not flowed back into the compressor 120/120' that is stopped.

The oil separator 122 is configured to communicate with the four-way valve 124 by the pipe. The four-way valve 124 is disposed to change the flow direction of the refrigerant according to the cooling and heating operation, each port is an outlet (or oil separator) of the compressor (120, 120 '), the inlet (or the compressor 120, 120') Accumulator), outdoor heat exchanger 180 and the indoor unit 200 is connected.

Therefore, the refrigerant discharged from the constant speed compressor 120 and the inverter compressor 120 'is collected in one place and then flows into the four-way valve 124. At the inlet of the four-way valve 124, compressors 120 and 120' A high pressure sensor 124 'for checking the pressure of the refrigerant to be discharged is installed.

Meanwhile, the four-way valve has a hot gas pipe 125 that allows a part of the refrigerant flowing into the four-way valve 124 from the oil separator 122 to be directly introduced into the accumulator 132 which will be described below. 124 is installed across.

When the hot gas pipe 125 needs to increase the pressure of the low pressure refrigerant flowing into the accumulator 132 during the operation of the air conditioner, the high pressure refrigerant at the discharge port of the compressors 120 and 120 'is directly directed to the inlet side of the compressor 120 and 120'. In order to be supplied, such a hot gas pipe 125 is provided with a hot gas valve 125 ′, which is a bypass valve, to open and close the pipe.

The valve support 126 is installed at the center of the first half of the upper surface of the base pan 110. The valve support 126 serves to support and guide the liquid pipe 210, the low pressure engine 212, and the high pressure engine 214, and a service valve 128 is also installed therein. Meanwhile, the pipes 210, 212, and 214 supported by the valve support 126 are drawn out to the outside through the pipe inlet 188 ′ of the side panel 188, which will be described below, and are connected to the indoor unit 200.

The outdoor supercooler 130 is formed at the right rear end of the upper surface of the base fan 110. The outdoor supercooler 130 to further cool the refrigerant heat exchanged in the outdoor heat exchanger 180 to be described below, formed at any position of the liquid pipe 210 connected to the outlet side of the outdoor heat exchanger 180. do.

The outdoor supercooler 130 is formed of a double pipe. That is, an inner tube (not shown) in communication with the liquid pipe 210 is formed in the center, and an outer tube (not shown) communicates with an outer tube (130 ') to be described below on the outside of the inner tube (not shown) ( Not shown) is formed.

On the other hand, in the liquid pipe 210 formed at the outlet of the outdoor supercooler 130, the reverse transfer pipe 130 'is formed in communication. The reverse conveying pipe 130 'serves to guide the refrigerant flowing out of the outdoor heat exchanger 180 and flowing through the liquid pipe 210 to flow into the outer pipe (not shown) and flow back.

The reverse transfer pipe 130 ′ is provided with a supercooled expansion valve 130 ′ a that converts the liquid refrigerant into a low temperature gas refrigerant by expansion. The subcooled expansion valve 130 ′ may control the amount of refrigerant flowing back through the back transfer pipe 130 ′.

Therefore, the refrigerant passing through the outdoor supercooler 130 to the desired temperature. That is, as the amount of refrigerant flowing back through the back transfer pipe 130 ′ increases, the temperature of the refrigerant passing through the outdoor supercooler 130 will be lowered.

When a part of the refrigerant discharged from the outdoor supercooler 130 is introduced into the reverse conveying pipe 130 'by the above configuration, the low temperature gas refrigerant is expanded while passing through the subcooling expansion valve 130'a. The low temperature gas refrigerant flows back through the outer tube (not shown) of the outdoor supercooler 130 to further cool the liquid refrigerant flowing through the inner tube (not shown) through heat exchange.

As such, the liquid refrigerant discharged from the outdoor heat exchanger 180 is further cooled by the heat conduction while passing through the outdoor supercooler 130, and is supplied to the indoor unit 200, and the outer tube of the outdoor supercooler 130 is illustrated. (Not shown) is supplied back to the compressors 120 and 120 'via the accumulator 132 to be circulated below.

Meanwhile, a liquid pipe temperature sensor 130s for measuring a temperature of the refrigerant discharged from the outdoor unit 100 is installed at an outlet of the outdoor supercooler 130, and a supercooling inlet sensor 130 is located at an outlet of the subcooling expansion valve 130 ′ a. 'b) is provided to measure the temperature of the reflux refrigerant flowing into the outdoor supercooler 130, the supercooling outlet sensor (130'c) in the reverse transfer pipe (130') through which the reverse flow refrigerant discharged from the outdoor supercooler (130) flows; ) Is provided.

A dryer 131 is provided at one side of the outdoor supercooler 130, that is, one side of the liquid pipe 210 through which the refrigerant discharged from the outdoor heat exchanger 180 is guided to the indoor unit 200. The dryer 131 serves to remove moisture contained in the refrigerant flowing through the liquid pipe 210.

An accumulator 132 is installed between a central portion of the base fan 110, that is, between the constant speed compressor 120 and the inverter compressor 120 ′. The accumulator 132 filters the liquid refrigerant so that only the gaseous refrigerant flows into the compressors 120 and 120 '.

That is, when the refrigerant remaining in the liquid phase without being evaporated into gas among the refrigerant flowing from the indoor unit 200 directly flows into the compressors 120 and 120 ', the compressor is formed into a gaseous refrigerant having a high temperature and high pressure. ), The load is increased, which causes damage to the compressors 120 and 120 '.

Therefore, among the refrigerants introduced into the accumulator 132, the refrigerant which is not evaporated and remains in the liquid phase is stored in the lower part of the accumulator 132 because it is relatively heavier than the refrigerant in the gas phase, and only the gaseous refrigerant in the upper portion of the compressor 120, 120 Flows into '). On the other hand, the inlet side of the accumulator 132 is provided with a suction pipe temperature sensor 132 ′ for measuring the temperature of the refrigerant sucked and a low pressure sensor 132 ″ for checking the pressure of the refrigerant.

Front frames 134 and 134 'are formed at both ends of the base pan 110, respectively. The front frames 134 and 134 'are formed vertically long at the tip of the base fan 110, and are divided into a front left frame 134 installed at the left end and a front right frame 134' installed at the right end. .

The front frames 134 and 134 'support the front upper bracket 116, the front grill 114, and the control boxes 140 and 140' to be described below. On the other hand, the center frame 136 is provided at the center of the front left frame 134 and the front right frame 134 '.

Control boxes 140 and 140 ′ are installed below the central frame 136. The control boxes 140 and 140 'are formed in pairs on the left and right sides. That is, the left control box 140 provided on the left side and the right control box 140 'provided on the right side, the left control box 140 is fixed to the front left frame 134 by a hinge 140a. The right control box 140 'is fixed to the front right frame 134' by a hinge 140'a.

The control boxes 140 and 140 'each have a rectangular box shape whose front is opened, and the front is shielded by the front panel 112. The left control box 140 is provided with a control component such as a voltage transformer 142 and a capacitor 144 and a heating element plate 146.

A heat radiating portion 146 ′ formed of heat radiating fins is formed on a rear surface of the heat generating element plate 146. On the other hand, the heat radiation fan 148 is installed on the rear upper end of the left control box 140, the heat radiation fan 148 is composed of a cross flow fan. Therefore, when the heat radiating fan 148 sucks air and discharges it upward, heat exchange in the heat radiating portion 146 'is promoted, and the heat generating element plate 146 is cooled.

Since the side ends of the control boxes 140 and 140 'are mounted to the front frames 134 and 134' by hinges 140a and 140'a, the hinges 140a and 140'a can be pivoted forward on the axis. Done. Therefore, when after-sales service of the internal parts is required, the control boxes 140 and 140 'can be rotated forward.

The barrier 150 is installed in the central frame 136. The barrier 150 divides the inside of the outdoor unit 100 into an upper space and a lower space. That is, the compressor 120 and 120 'and the control box 140, 140' and the lower side is installed, and the outdoor heat exchanger 180 to be described below is partitioned.

The barrier 150 is provided on the left and right sides similarly to the control boxes 140 and 140 '. The barrier 150 has a horizontal portion 150 'formed rearward from the center frame 136 and an inclined portion 150 "formed to be inclined downward from the rear end of the horizontal portion 150' at a predetermined angle. Is made of.

Meanwhile, an air guide hole 152 is formed in the horizontal portion 150 ′ of the left barrier 150 of the barrier 150, and an air guide cover 154 is installed above the air guide hole 152. The air guide cover 154 is configured such that the front and the top is shielded and the rear is opened, so that the air forcedly blown from the heat radiating fan 148 provided at the bottom is guided to the rear.

The upper surface of the outdoor unit 100 is formed by the upper panel 160. The top panel 160 has a square flat plate shape and is provided in pairs on the left and right sides. In addition, the upper panel 160 has a ventilation hole 162 formed, and the edge of the ventilation hole 162 extends downward to form a cylindrical shroud 164. The shroud 164 is formed integrally with the upper panel 160, preferably made of a plastic material.

The shroud 164 is formed in a cylindrical shape to guide the air forcedly blown by the blowing fan 170 to be described below. Meanwhile, a circular discharge grill 166 corresponding to the ventilation hole 162 is mounted on the shroud 164, that is, the ventilation hole 162.

The blowing fan 170 is installed inside the shroud 164. The blowing fan 170 is rotated by the fan motor 172 provided at the bottom, and discharges the air therein upward. That is, when the fan motor 172 generates a rotational force by the power applied from the outside, the blowing fan 170 fixed to one end of the rotation shaft of the fan motor 172 is rotated to discharge the air upward.

The fan motor 172 is fixed by the motor mount 174. The motor mount 174 is composed of a fixed plate 174 'of a square plate and a support 174 "for supporting the fixed plate 174'. The support 174" is formed in a pair on the left and right, The fixing plate 174 'is mounted at the center of the pair of supports 174 ". The front and rear ends of the support 174 " are bent upwards to allow the front upper bracket 116 and the rear surface to be described below. It is fixed to the upper bracket 194 respectively.

An outdoor heat exchanger 180 is provided below the upper panel 160. The outdoor heat exchanger 180 is installed in pairs before and after the heat exchange between the refrigerant flowing inside and the outside air. That is, the front heat exchanger 182 is installed below the front end of the upper panel 160, and the rear heat exchanger 184 is installed below the rear end of the upper panel 160.

The lower half of the front heat exchanger 182 is bent backwards. That is, it consists of a vertical portion 182 'extending downwardly from the front end of the front panel 112 at a predetermined length, and an inclined portion 182 "formed to be inclined at a predetermined angle backward from the bottom of the vertical portion 182'. do.

Accordingly, the lower end of the inclined portion 182 ″ and the lower end of the rear heat exchanger 184 are adjacent to each other, and the lower end of the outdoor heat exchanger 180 has a predetermined distance from the base fan 110. In addition, a tube assembly 180 'is further formed on the side surface of the outdoor heat exchanger 180 to distribute the refrigerant supplied from the compressors 120 and 120' to the respective parts.

On the other hand, the heat exchanger temperature sensor 180a for measuring the temperature of the heat exchanger is installed inside the outdoor heat exchanger 180, and the outdoor temperature sensor 180b for measuring the temperature of the outside is further provided.

A drain pan 186 is provided below the bottom of the outdoor heat exchanger 180. The drain pan 186 is formed long to the left and right and collects the condensed water generated in the outdoor heat exchanger 180 and discharges it to the side.

Side panels 188 are installed at left and right ends of the upper surface of the base fan 110. The side panel 188 forms a side appearance of the outdoor unit 100, and pipe entrance holes 188 'are formed at the lower end before and after.

The rear grill 190 is installed at the rear end of the base fan 110. The rear grill 190 is formed to correspond to the size of the rear heat exchanger 184, the rear panel 192 is provided below the rear grill 190.

The upper rear bracket 194 is formed to the left and right at an upper end of the rear grill 190. The upper rear bracket 194 is installed on the upper front surface of the rear grill 190 to support the rear end of the support 174 ″ of the motor mount 174.

The rear frame 196 is installed at the rear edge of the base fan 110. The rear frame 196 is elongated upward and downward to support the rear grill 190, the rear panel 192, and the upper panel 160.

On the other hand, as shown in Figure 7, one side of the outdoor LEV 102 is further provided with a cooling dedicated pipe 198 bypassing the outdoor LEV (102). In addition, a cooling valve 198 ′, which is a bypass valve, is further installed in the cooling dedicated piping 198 to control the refrigerant passing through the cooling dedicated piping 198. That is, when the air conditioner is operated in the cooling only mode, the cooling valve 198 'is opened so that the refrigerant flows through the cooling only pipe 198.

8 and 9 show a distributor of the multi-type air conditioner according to the present invention. As shown therein, the dispenser 300 is also called a H Recovery Unit, and is provided in a rectangular distributor case 310 and an upper side of the distributor case 310 to shield the inside of the distributor cover. An appearance is formed by 315.

On both sides of the distributor case 310, the liquid pipe 210 and the high pressure pipe 214 and the low pressure pipe 212 is connected to the liquid connection pipe 320, the high pressure connection pipe 322 and the low pressure connection pipe 324 Each is formed to protrude. Accordingly, the liquid connecting pipe 320 is fastened to the liquid pipe 210, the high pressure connecting pipe 322 to the high pressure pipe 214, and the low pressure connecting pipe 324 to the low pressure pipe 212 are fastened to form a refrigerant. You will be guided.

Since the liquid connection tube 320, the high pressure connection tube 322, and the low pressure connection tube 324 are formed to protrude to both sides of the distributor case 310, when the plurality of outdoor units 100 are respectively installed on the left and right sides. Edo is connected to each of the liquid pipe 210, high pressure engine 214 and low pressure engine 212 is easy.

In addition, the front side of the dispenser case 310 (see FIG. 8) includes an indoor connection pipe 212 ″ and an indoor connection liquid pipe 210 ″ fastened to the indoor engine 212 ′ and the indoor liquid pipe 210 ′, respectively. It is formed to protrude forward. Therefore, the indoor connection pipe 212 ″ is fastened to the indoor engine 212 ′, and the indoor connection pipe 210 ′ is fastened to the indoor liquid pipe 210 ′ to guide the flow of the refrigerant.

The indoor connection engine 212 ″ is provided with a plurality of main valves 330 and auxiliary valves 332 including bypass valves. That is, as illustrated, a first indoor engine 212 ′ of the first indoor chamber 200 is shown. A first main valve 330a is installed in the first indoor connection engine 212 "a fastened to a), and a second indoor connection fastened with the second indoor engine 212'b of the second indoor chamber 200b. The second main valve 330b is installed in the engine 212 "b.

In addition, a third main valve 330c is installed in the third indoor connection engine 212 ″ c which is engaged with the third indoor engine 212 ′ c of the third indoor chamber 200c, and the third indoor valve 200d of the fourth indoor chamber 200d. A fourth main valve 330d is installed in the fourth indoor connection engine 212 "d connected to the fourth indoor engine 212'd to selectively pass the refrigerant.

Therefore, when the air conditioner is operated in the cooling or heating mode, the main valves 330a, 330b, 330c, and 330d and the auxiliary valves 332a, 332b, 332c, and 332d are selectively opened, and the air conditioner is cold / At the time of heating switching, both the main valves 330a, 330b, 330c, and 330d and the auxiliary valves 332a, 332b, 332c, and 332d are shielded for a predetermined time, more precisely, 2 to 3 minutes.

This is to reduce the switching noise due to the sudden impact of the refrigerant because the flow direction of the refrigerant when operating in the cooling operation mode flows in the reverse direction when operating in the heating operation mode.

Meanwhile, the indoor connection engine 212 "is branched inside the distributor 300 to form a branch pipe 340. That is, a first branch pipe 340a is formed from the first indoor connection engine 212" a. The first branch pipe 340a is branched, and a first auxiliary valve 332a is installed to selectively control the refrigerant passing through the first branch pipe 340a.

A second branch pipe 340b and a third branch pipe 340c are also applied to the second indoor connection engine 212 "b, the third indoor connection engine 212" c, and the fourth indoor connection engine 212 "d, respectively. ) And the fourth branch pipe 340d, and each of the branch pipes 340 also has a second auxiliary valve 332b and a third auxiliary valve 332c having the same function as the first auxiliary valve 332a. And a fourth auxiliary valve 332d, respectively.

The branch pipe 340 is in communication with the high pressure connecting pipe 322. That is, each branch pipe 340 has one end connected to the indoor connection engine 212 ", and the other end connected to the high pressure engine 214. Therefore, when the auxiliary valve 332 is opened, The indoor engine 212 ′ and the high pressure engine 214 communicate with each other.

The distributor 300 is further provided with a simultaneous supercooler 350. The simultaneous supercooler 350 is operated when the air conditioner is simultaneously heated and cooled to serve to improve the cooling efficiency. The simultaneous supercooler 350 is connected to the liquid pipe 210, and is configured as a double pipe like the outdoor supercooler 130 to further cool the refrigerant flowing through the liquid pipe 210.

And although not shown, the liquid pipe 210 provided in the interior of the simultaneous supercooler 350 is preferably made of a spiral tube. The spiral tube improves the cooling rate and the cooling efficiency.

A bypass pipe 352 branched from the liquid pipe 210 is further formed at the inlet of the simultaneous supercooler 350, and the bypass pipe 352 is provided with a supercooling control valve 354. The supercooling control valve 354 is opened during the simultaneous operation of air conditioning and heating to allow the refrigerant flowing through the liquid pipe 210 to be further cooled. That is, the two-phase (gas + liquid) refrigerant flowing through the liquid pipe 210 is cooled in the simultaneous supercooler 350 to be converted into a complete liquid phase.

The condenser liquid removing means 360 is further provided inside the distributor 300. The condensate removing unit 360 includes a refrigerant connection pipe 362 for allowing the high pressure engine 214 and the low pressure engine 212 to communicate with each other, and a connection pipe for controlling the flow of the refrigerant through the refrigerant connection pipe 362. An on / off valve 364 and a capillary tube 366 for expanding the refrigerant flowing through the refrigerant connecting pipe 362 are included.

The connection pipe open / close valve 364 opens the refrigerant connection pipe 362 when an air conditioner is operated in a cold discharge chamber operation mode, and the refrigerant flowing through the refrigerant connection pipe 362 is the capillary pipe 366. Inflates. Therefore, during the cooling chamber operation, the condensate of the refrigerant condensed in the high pressure engine 214 expands and is recovered to the low pressure engine 212.

On the other hand, the refrigerant bypass means 370 is further provided inside the distributor. The refrigerant bypass means 370 serves to reduce the amount of impact by bypassing the refrigerant when the refrigerant stopped before the cooling / heating switching of the indoor unit 200 and the refrigerant flowing after the cooling / heating switching collide with each other. .

That is, the refrigerant bypass means serves to reduce noise generated at the time of cooling / heating switching by bypassing the refrigerant when the high pressure refrigerant and the low pressure refrigerant collide with each other to correct the pressure difference between the refrigerants.

To this end, the refrigerant bypass means 370 is a refrigerant bypass pipe 372 is installed so that one end is in communication with the low-pressure connection pipe 324 and the other end is in communication with the indoor connection engine 212 ", and the refrigerant bypass pipe 372 It is configured to include a refrigerant bypass valve 374 for selectively opening and closing the inside of the.

In more detail, the refrigerant bypass pipes 372a, 372b, 372c, and 372d and the refrigerant bypass valves 374a, 374b, 374c, and 374d are formed in the first indoor connection engine 212 " a " One each in the fourth indoor connection engine 212 "d.

The refrigerant bypass valves 374a, 374b, 374c, and 374d are operated in the cooling and discharging chamber, and are opened and closed in the same manner as the auxiliary valves 332a, 332b, 332c, and 332d when any one chamber is opened in the heating mode. .

Therefore, the branch pipes 340a, 340b, 340c, and 340d in the state in which the auxiliary valves 332a, 332b, 332c, and 332d and the refrigerant bypass valves 374a, 374b, 374c, and 374d are shielded when operating in the cooling mode. The refrigerant remaining in the branch pipe 340a from the outdoor unit 100 is opened as the auxiliary valves 332a, 332b, 332c, and 332d and the refrigerant bypass valves 374a, 374b, 374c, and 374d open at the time of switching to the heating mode. Even though the coolant is introduced into the coolant introduced into the coolant 340b, 340c, and 340d, a part of the coolant bypass pipe 372a, 372b, 372c, and 372d is introduced into and bypassed, thereby reducing the impact.

Hereinafter, the operation of the multi-type air conditioner according to the present invention having the configuration as described above will be described with reference to FIGS. 10 to 13.

First, with reference to Figure 10 looks at the operating state of the cooling room operation. As shown in FIG. 10, the first indoor chamber 200a, the second indoor chamber 200b, the third indoor chamber 200c, and the fourth indoor chamber 200d are used for cooling.

First, referring to the refrigerant flow in the outdoor unit 100, the gas refrigerant flowing from the indoor unit 200 is compressed and discharged from the compressors 120 and 120 ', and the refrigerant discharged from the compressors 120 and 120' is discharged. As the oil passes through the oil separator 122, oil is separated and recovered to the compressors 120 and 120 ′. That is, as the refrigerant is compressed in the compressors 120 and 120 ', oil is mixed in the refrigerant. Since the oil is in the liquid state and the refrigerant is in the gas state, the oil is separated from the oil separator 122 which is the gas-liquid separator.

The refrigerant passing through the oil separator 122 is introduced into the external heat exchanger 180 via the four-way valve 124. Since the outdoor heat exchanger 180 functions as a condenser (in the cooling mode), the refrigerant is cooled through heat exchange with external air to become a liquid refrigerant.

The refrigerant discharged from the outdoor heat exchanger 180 passes through the cooling only pipe 198. That is, since the cooling valve 198 ′ is opened during the operation of the cooling chamber, the refrigerant passing through the outdoor heat exchanger 180 does not pass through the outdoor LEV 102 and passes through the cooling dedicated pipe 198. Will pass.

In the cooling and discharging chamber operation, the subcooling expansion valve 130 ′ a is opened to operate the outdoor supercooler 130. Therefore, the refrigerant passing through the cooling exclusive pipe 198 is further cooled in the outdoor supercooler 130 to become a liquid refrigerant. The refrigerant passing through the outdoor supercooler 130 passes through a dryer (131) for removing moisture contained in the refrigerant and then flows into the distributor (300) through the liquid pipe (210).

The distributor 300 distributes and supplies a refrigerant to the plurality of indoor units 200. That is, the first indoor chamber 200a through the first indoor liquid pipe 210'a, the second indoor liquid pipe 210'b, the third indoor liquid pipe 210'c and the fourth indoor liquid pipe 210'd, The refrigerant is supplied to the second indoor chamber 200b, the third indoor chamber 200c, and the fourth indoor chamber 200d, respectively.

The refrigerant introduced into each indoor unit 200 is expanded by the expansion valve 204 to be decompressed, and heat exchange is performed in each indoor heat exchanger 202. At this time, since the first indoor heat exchanger 202a, the second indoor heat exchanger 202b, the third indoor heat exchanger 202c, and the fourth indoor heat exchanger 202d all serve as evaporators, the refrigerant is exchanged through heat exchange. Low pressure gas.

The refrigerant discharged from the indoor heat exchanger 202 is introduced again into the distributor 300 via the respective indoor engines 212 ′. In this case, each of the auxiliary valve 332 and the refrigerant bypass valve 374 in the distributor 300 are in an off state and the main valve 330 is in an on state. The refrigerant passes through.

The refrigerant passing through the distributor 300 enters the accumulator 132 through the low pressure engine 212. In the accumulator 132, the liquid refrigerant that has not been evaporated is filtered out, and only the refrigerant in the gaseous state is selected and supplied to the compressors 120 and 120 '. Through this process, one cycle is completed.

On the other hand, during the operation of the cold discharge chamber as described above, a part of the high pressure refrigerant discharged from the compressors 120 and 120 'is also partially moved to the high pressure engine 214. However, the flow of the refrigerant through the high pressure engine 214 is blocked in the distributor 300. That is, since the first main valve 330a, the second main valve 330b, the third main valve 330c, and the fourth main valve 330d in the distributor 300 are turned off, the high pressure engine 214 The refrigerant is condensed and accumulated in the high-pressure connecting pipe 322.

In addition, since the connection pipe open / close valve 364 is opened during the operation of the cooling discharge chamber, the refrigerant flows through the refrigerant connection pipe 362. That is, the refrigerant inside the high pressure engine 214 moves to the low pressure engine 212 through the refrigerant connection pipe 362, and the condensed refrigerant is expanded by the capillary tube 366 and recovered to the low pressure engine 212. . As such, when the refrigerant flows through the refrigerant connection pipe 362, the air conditioner maintains a stable cycle as a whole.

Next, the refrigerant flow during the cooling main body operation will be described with reference to FIG. 11.

During the cooling main body operation after the cooling chamber operation, the first indoor chamber 200a, the second indoor chamber 200b, and the third indoor chamber 200c of the four indoor units 200 operate in the cooling mode, and the fourth indoor chamber ( Only 200d) is operated by heating.

To this end, the fourth main valve 330d, the fourth auxiliary valve 332d, and the fourth refrigerant bypass valve 374d maintain the shielded state for 2 to 3 minutes, and then the fourth main valve 330d is shielded. The fourth auxiliary valve 332d and the fourth refrigerant bypass valve 374d remain open.

Accordingly, the low pressure refrigerant stopped in the fourth branch pipe 340d collides with the high pressure refrigerant flowing through the fourth auxiliary valve 332d. At this time, the refrigerant having different pressures is different from the fourth refrigerant. By detouring to the hall 372d, the pressure difference is corrected, so that the impact amount is reduced and the noise can be reduced.

Therefore, in the outdoor unit 100, the refrigerant discharged from the compressors 120 and 120 ′ passes through the oil separator 122, and oil is separated and recovered to the compressors 120 and 120 ′.

The refrigerant passing through the oil separator 122 flows into the outdoor heat exchanger 180 through the four-way valve 124. Since the outdoor heat exchanger 180 functions as a condenser (in the cooling mode), the refrigerant is cooled through heat exchange with external air to become a liquid refrigerant.

The refrigerant discharged from the outdoor heat exchanger 180 passes through the outdoor LEV 102. At this time, the amount of refrigerant is controlled by the outdoor LEV 102, and the cooling exclusive pipe 198 is blocked by the cooling valve 198 ′. In addition, since the supercooled expansion valve 130 ′ is turned off, the refrigerant flows into the distributor 300 through the liquid pipe 210.

The refrigerant introduced into the distributor 300 is supercooled by the simultaneous supercooler 350. That is, since the subcooling control valve 354 is opened, a part of the refrigerant introduced through the liquid pipe 210 is introduced into the bypass pipe 352 and expanded. Therefore, the refrigerant flowing in the simultaneous supercooler 350 is further cooled.

The coolant further cooled while passing through the simultaneous supercooler 350 is the indoor connection engine 212 "a, 212" b, 212 "c and the first, second and third indoor liquid pipes 210'a, 210'b, 210. The first, second, and third indoor rooms 200a, 200b, and 200c are introduced via 'c).

At this time, since the auxiliary valves 332a, 332b, and 332c and the refrigerant bypass valves 374a, 374b, and 374c are shielded, the branch pipes 340a, 340b, and 340c and the refrigerant bypass tubes 372a, 372b, and 372c. The refrigerant flow is blocked.

The refrigerant flowing into the first, second, and third indoor chambers 200a, 200b, and 200c passes through the first, second, and third indoor heat exchangers 202a, 202b, and 202c to realize cooling through heat exchange with indoor air. Done. That is, since the first, second and third indoor heat exchangers 202a, 202b and 202c act as evaporators, the refrigerant becomes a low pressure gas through heat exchange.

The refrigerant passing through the first, second, and third indoor chambers 200a, 200b, and 200c is introduced into the distributor 300 again. At this time, the first, second and third main valves 330a, 330b and 330c of the distributor 300 are opened and the fourth main valve 330d is off. The first, second, and third auxiliary valves 332a, 332b, and 332c are turned off, and the fourth auxiliary valve 332d is turned on to open.

Therefore, the low pressure refrigerant introduced into the distributor 300 flows into the outdoor unit 100 through the low pressure engine 212 and enters the accumulator 132. In the accumulator 132, the liquid refrigerant that has not been evaporated is filtered out, and only the refrigerant in the gaseous state is selected and supplied to the compressors 120 and 120 '. Through this process, one cycle is completed.

Meanwhile, in the cooling main body operation, a part of the high pressure refrigerant discharged from the compressors 120 and 120 'is also partially moved to the high pressure engine 214. This refrigerant is introduced into the distributor 300.

At this time, the first, second and third auxiliary valves 332a, 332b and 332c are all turned off in the distributor 300 and the fourth auxiliary valve 332d and the fourth refrigerant bypass valve 374d are described above. Only open.

Accordingly, some of the refrigerant stopped in the fourth branch pipe 340d is diverted to the fourth indoor connection engine 212 ″ d through the fourth refrigerant bypass pipe 372d, and the other part of the refrigerant is stopped in the fourth room. It is introduced into the fourth indoor chamber 200d through the engine 212'd.

At this time, since the fourth indoor heat exchanger 202d of the fourth indoor chamber 200d acts as a condenser, the refrigerant is changed into a liquid phase and flows into the distributor 300 through the fourth indoor liquid pipe 210'd. The liquid refrigerant flowing into the distributor 300 is mixed with the refrigerant flowing through the liquid pipe 210 and flows to the first, second, and third indoor chambers 200a, 200b, and 200c as described above, and used for cooling. do.

The reason why the liquid refrigerant of the distributor 300 does not flow back to the fourth indoor liquid pipe 210'd is due to the pressure difference of the refrigerant. That is, the pressure of the refrigerant in the fourth indoor liquid pipe 210'd is greater than the pressure of the refrigerant in the first, second, and third indoor liquid pipes 210'a, 210'b, and 210'c.

Hereinafter, look at the operating state during the heating room operation. As shown in FIG. 12, the first indoor compartment 200a, the second indoor compartment 200b, the third indoor compartment 200c, and the fourth indoor compartment 200d are used for heating. In addition, since the functions of the respective components have been described in the state description during the cooling and discharging chamber operation, detailed functions of the respective components will be omitted.

First, referring to the refrigerant flow in the outdoor unit 100, the refrigerant discharged from the compressors 120 and 120 ′ passes through the oil separator 122 and flows into the distributor 300 through the high pressure engine 214.

In the distributor 300, each main valve 330 is turned off, and each auxiliary valve 332 is turned on to open. Therefore, the refrigerant introduced into the distributor 300 through the high pressure engine 214 flows into the indoor engine 212 ′ through the branch pipe 340 and is supplied to the indoor unit 200.

The refrigerant passing through the indoor heat exchanger 202 inside the indoor unit 200 is condensed through heat exchange with indoor air. That is, in the case of heating, the indoor heat exchanger 202 acts as a condenser to warm the internal air by heat generation. Since the expansion valves 204 are all open, the refrigerant changed into a liquid phase while passing through the indoor heat exchanger 202 flows into the distributor 300 through the indoor liquid pipe 210 '.

The liquid refrigerant in the distributor 300 is introduced into the outdoor unit 100 through the liquid pipe 210. The refrigerant introduced into the outdoor unit 100 passes through the outdoor LEV 102 and is supplied to the outdoor heat exchanger 180 to generate heat exchange. At this time, since the outdoor heat exchanger 180 acts as an evaporator, the liquid refrigerant is changed to the gas phase by heat exchange with external air.

The low-pressure refrigerant in the gas phase discharged from the outdoor heat exchanger 180 passes through the four-way valve 104 and is supplied to the compressors 120 and 120 'through the accumulator 132. Through this process, one heating cycle is formed.

13 shows an operating state in the heating main body operation. During the heating main operation, the first indoor unit 200a, the second indoor unit 200b, and the third indoor unit 200c of the four indoor units 200 operate in a heating mode, and only the fourth indoor unit 200d is cooled. It works.

Therefore, when first described as a heating reference, the refrigerant discharged from the compressor (120, 120 ') is introduced into the distributor 300 through the high pressure engine 214 through the oil separator 122.

At this time, in the distributor 300, the first, second and third main valves 330a, 330b and 330c are turned off and only the fourth main valve 330d is turned on, and the first, second and third auxiliary valves 332a are used. , 332b, 332c are on and the fourth auxiliary valve 332d is off. Therefore, the refrigerant of the high-pressure engine 214 passes through the first, second, and third branch pipes 340a, 340b, and 340c to the first, second, and third indoor engines 212'a, 212'b, and 212'c. Inflow is supplied to the first, second, third indoor (200a, 200b, 200c).

The refrigerant passing through the first, second and third indoor heat exchangers 202a, 202b and 202c in the first, second and third indoor chambers 200a, 200b and 200c is condensed through heat exchange with indoor air. That is, in the case of heating, the first, second and third indoor heat exchangers 202a, 202b, and 202c act as condensers to warm internal air by heat generation. Since the first, second, and third expansion valves 204a, 204b, and 204c are all open, the refrigerant changed into the liquid phase while passing through the first, second, and third indoor heat exchangers 202a, 202b, and 202c is the first agent. It is introduced into the distributor 300 through the 1,2,3 indoor liquid pipes 210'a, 210'b, 210'c.

Some of the refrigerant discharged from the compressors 120 and 120 ′ also flow into the outdoor heat exchanger 180 via the four-way valve 124. Since the outdoor heat exchanger 180 functions as a condenser (in the cooling mode), the refrigerant is cooled through heat exchange with external air to become a liquid refrigerant.

The refrigerant discharged from the outdoor heat exchanger 180 passes through the outdoor LEV 102. At this time, the amount of refrigerant is controlled by the outdoor LEV 102, and the cooling exclusive pipe 198 is blocked by the cooling valve 198 ′. In addition, since the supercooled expansion valve 130 ′ is turned off, the refrigerant flows into the distributor 300 through the liquid pipe 210.

As such, the refrigerant introduced into the distributor 300 through the liquid pipe 210 passes through the first, second and third indoor chambers 200a, 200b, and 200c, and the first, second and third indoor liquid pipes 210'a, 210 '. b, 210'c) is combined with the liquid refrigerant flowing into the distributor 300.

As described above, the refrigerant introduced into the distributor 300 is supercooled by the simultaneous supercooler 350. That is, since the subcooling control valve 354 is opened, a part of the refrigerant introduced through the liquid pipe 210 is introduced into the bypass pipe 352 and expanded. The refrigerant flowing in the simultaneous supercooler 350 is further cooled by heat exchange with the expanded refrigerant.

The coolant further cooled while passing through the simultaneous supercooler 350 is introduced into the fourth indoor chamber 200d through the fourth indoor liquid pipe 210'd. At this time, since the fourth expansion valve 204d is open, the refrigerant passes through the fourth indoor heat exchanger 202d to realize cooling through heat exchange with indoor air. That is, since the fourth indoor heat exchanger 202d acts as an evaporator, the refrigerant becomes low pressure gas through heat exchange.

The refrigerant passing through the fourth indoor chamber 200d is introduced into the distributor 300 again. At this time, since the fourth main valve 330d of the distributor 300 is opened and the fourth auxiliary valve 332d is off, the low pressure refrigerant is supplied to the outdoor unit 100 through the low pressure engine 212.

The refrigerant flowing into the outdoor unit 100 through the low pressure engine 212 enters the accumulator 132. In the accumulator 132, the liquid refrigerant that has not been evaporated is filtered out, and only the refrigerant in the gaseous state is selected and supplied to the compressors 120 and 120 '. Through this process, one cycle is completed.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

As described above, in the multi-type air conditioner according to the present invention, a plurality of indoor units are provided in at least one outdoor unit, and a distributor is provided between the indoor unit and the outdoor unit to guide the flow of the refrigerant. Therefore, in the multi-type air conditioner according to the present invention, a plurality of indoor units have the advantage that they can be individually operated simultaneously.

In the multi-type air conditioner according to the present invention, a bypass means for compensating the pressure by bypassing the stop coolant and the flow coolant when colliding with the cooling / heating switching inside the distributor is further configured.

Therefore, there is an advantage in that noise and impact generated due to a pressure difference when a high-pressure refrigerant and a high-temperature refrigerant collide with each other are reduced.

In addition, there is an advantage that the circulation of the refrigerant is smooth and the customer's emotional complaints are eliminated due to the above reason.

In addition, there is an advantage that the damage to the air conditioner is prevented in advance and the air conditioning efficiency is improved.

Claims (12)

An air conditioner comprising: at least one outdoor unit, at least one indoor unit composed of cycles corresponding to the outdoor unit, and a distributor provided between the indoor unit and the outdoor unit to control a flow of refrigerant; Inside one side of the distributor, Refrigerant bypass that compensates for the pressure difference between refrigerants when high / low pressure refrigerants stopped before cooling / heating switching of indoor unit and low / high pressure refrigerants flowing after cooling / heating switching collide with each other. Multi-type air conditioner, characterized in that provided with means. The multi-type air conditioner according to claim 1, wherein the outdoor unit is connected with a high pressure engine and a low pressure engine serving as a flow path of gas refrigerant, and one end of a liquid pipe serving as a flow path of liquid refrigerant. The multi-type air conditioner according to claim 2, wherein the indoor unit is connected to an indoor engine serving as a flow path of gas refrigerant and one end of an indoor liquid pipe serving as a flow path of liquid refrigerant. The distributor according to claim 3, wherein the distributor comprises: a high-pressure connecting tube and a low-pressure connecting tube and a liquid connecting tube respectively fastened with the high-pressure engine, the low-pressure engine, and the liquid pipe; Multi-type air conditioner, characterized in that the indoor connection liquid pipe is provided. The multi-type air conditioner according to claim 4, wherein both end portions of the refrigerant bypass means are installed in communication with the low pressure connection pipe and the indoor connection engine. The method of claim 5, wherein the distributor, A main valve for selectively opening and closing the indoor connection engine; One end is in communication with the high-pressure connecting pipe and the other end is formed with a branch pipe communicating with the indoor connection engine, One side of the branch pipe is a multi-type air conditioner, characterized in that the auxiliary valve for controlling the refrigerant flow by selectively opening and closing the branch pipe in accordance with the cooling and heating mode of the indoor unit. The multi-type air conditioner according to claim 6, wherein the indoor connection engine and the indoor connection liquid pipe are provided in plural numbers. The multi-type air conditioner of claim 7, wherein the high pressure connecting pipe, the low pressure connecting pipe, and the liquid connecting pipe are provided in plural numbers. The multi-type air conditioner according to claim 6, wherein the main valve and the auxiliary valve of the distributor are opened and closed differently to control the flow of the refrigerant. The method of claim 9, wherein the refrigerant bypass means, A refrigerant bypass tube having one end communicating with the low pressure connection tube and the other end communicating with the indoor connection engine; And a refrigerant bypass valve for selectively opening and closing the refrigerant bypass pipe. The multi-type air conditioner according to claim 10, wherein the refrigerant bypass valve is opened when the indoor unit is operated in a heating mode. 12. The multi-type air conditioner of claim 11, wherein the refrigerant bypass valve is opened and closed in the same manner as the auxiliary valve.

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