KR20050088539A - Multi-airconditioner - Google Patents

Abstract

The present invention relates to a multi-type air conditioner provided between a plurality of outdoor units and indoor units, and the refrigerant pipe for guiding the refrigerant is branched by various methods.

The multi-type air conditioner according to the present invention includes at least one outdoor unit 100 in which heat exchange occurs; A plurality of indoor units 200 in which heat exchange occurs; A central controller 300 for controlling the operation of the indoor unit 200 and the outdoor unit 100 and a refrigerant pipe installed between the outdoor unit 100 and the indoor unit 200 to guide the flow of the refrigerant. Has a configuration to include. The refrigerant pipe includes a common pipe (210, 212) for guiding the refrigerant entering and exiting the outdoor unit 100, and branch pipes (210 ', 212') for guiding the refrigerant entering and exiting each indoor unit (200) The branch pipes 210 'and 212' may be branched from the common pipes 210 and 212 by a line distribution method or a head distribution method, or may be individually or collectively branched from the common pipes 210 and 212 by a combination distribution method. do. According to the multi-type air conditioner according to the present invention having such a configuration, there is an advantage that the installation work is convenient.

Description

Multi Air Conditioner {Multi-airconditioner}

The present invention relates to an air conditioner, and more particularly, at least one or more outdoor units and a plurality of indoor units are installed, and a refrigerant pipe provided between the outdoor unit and the indoor unit to guide the refrigerant is configured to be branched by various methods. It is about the flag.

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 an installation state of a conventional multi-type air conditioner, and FIG. 2 is a block diagram schematically illustrating 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 30, an outdoor heat exchanger 20, 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 above-described configuration performs the cooling action, the outdoor heat exchanger 20 of the outdoor unit 1 serves as a condenser to condense the refrigerant of the high temperature / high pressure gas state conveyed 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. The refrigerant is passed through the accumulator 30 and then 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 30-> indoor heat exchanger 60-> expansion valve 70-> outdoor heat exchanger 20.

At this time, the indoor heat exchanger 60 serves as a condenser to heat exchange the indoor air with the refrigerant having a high temperature and high pressure passing therein, and the outdoor heat exchanger 20 exchanges the outdoor air with the low temperature and low pressure refrigerant therein. It acts as an evaporator.

3 to 5 show a conventional outdoor unit 1. As shown in these figures, the base fan 2 is formed in the lower portion is seated a number of parts, the front end of the base fan 2 is provided with a front panel 4 to form a front appearance. The front panel 4 includes an upper front panel 4 'provided at an upper side and a front lower panel 4 "provided at a lower side thereof.

The front lower panel 4 "is further provided with a pipe bracket 4" a. That is, the lower end of the front lower panel 4 "is cut to a certain portion, and the cutout is configured to shield the pipe bracket 4" a, and the pipe bracket 4 "a is connected to the high pressure pipe 80. The low pressure pipe (90) is guided to be installed in communication with the indoor unit (50).

A center bracket 6 is installed between the front upper panel 4 'and the front lower panel 4 "to guide the installation. Meanwhile, an upper bracket 6' is provided at the top of the front upper panel 4 '. It is further installed, the end portion of the motor mount 48 'to be described below is fastened to the upper bracket (6').

The front frame 8 is provided at the left and right ends of the front panel 4, that is, at the front left and right edges of the base pan 2. The front frame 8 is formed long and vertically to support the front panel 4 and the side grill 34 to be described below.

The base fan 2 is provided with a compressor 10. The compressor 10 is to compress the refrigerant to be a high temperature and high pressure, respectively provided on the left and right sides. That is, a constant speed compressor 10 'for constant speed operation is installed on the right side, and an inverter compressor 10 "is installed on the left side.

One side of the compressor 10 is provided with an oil separator 12, respectively. The oil separator 12 filters the oil mixed in the refrigerant discharged from the compressor 10 to be recovered to the compressor 10.

The valve support 14 is installed at a predetermined height at the left rear end of the base pan 2, and the service valve 16 is installed and supported at an upper end of the valve support 14.

An accumulator 30 is installed between a central portion of the base fan 2, that is, between the constant speed compressor 10 ′ and the inverter compressor 10 ″. The accumulator 30 filters the liquid refrigerant so that only the refrigerant in the gaseous state is provided. To be introduced into the compressor (10).

The control box 22 is installed above the compressor 10. Although not shown, the control box 22 includes control components such as voltage transformers and capacitors, and a circuit board. The control box 22 has a rectangular box shape with an open front, and a control cover 22 'is provided at the front to shield the inside.

The outdoor end heat exchanger 20 is provided at the side end and the rear end of the base fan 2. The outdoor heat exchanger 20 is provided in pairs on the left and right to allow heat exchange between the refrigerant flowing inside and the outside air.

That is, the left outdoor heat exchanger 30 'in the' ┏ 'shape (viewed from the top) is installed on the left side, and the right outdoor heat exchanger 30 "in the' ┓ 'shape (viewed from the top) is installed on the right side. In addition, the outdoor heat exchanger 20 has a tube assembly 32 formed at the inlet for guiding the inflow of the refrigerant, and a receiver 33 is provided at the outlet.

The side grille 34 is installed at the left end and the right end of the base fan 2, and the rear grille 36 is installed at the rear end thereof. The back grill 36 is provided with a pair to correspond to the outdoor heat exchanger (20). That is, the left rear grill 36 'is installed at the rear of the left outdoor heat exchanger 30' and the right rear grill 36 'is installed at the rear of the right outdoor heat exchanger 30'.

A rear frame 38 is provided between the left rear grill 36 ′ and the right rear grill 36 ″ to fix the rear grill 36, and the rear end left and right edges of the base fan 2 are rearward. Frames 38 'are each formed.

The top face of the outdoor unit 1 is formed by the top panel 40. The top panel 40 is formed of a square flat plate corresponding to the base pan 2, and a pair of vent holes 40 'are formed at left and right sides of the center.

The shroud 42 is installed on the upper surface of the vent hole 40 '. The shroud 42 has a cylindrical shape protruding upward, and guides the air discharged to the outside by the blowing fan 46 to be described below. The discharge grill 44 is provided at the top of the shroud 42.

The blowing fan 46 is installed inside the shroud 42. The blowing fan 46 is rotated by the fan motor 48 provided below, and serves to discharge the internal air to the outside. Meanwhile, the fan motor 48 is mounted by the motor mount 48 '.

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

Between the outdoor unit 1 and the plurality of indoor units 50 as described above, pipes corresponding to the number of indoor units 50, that is, the high pressure pipe 80 and the low pressure pipe 90, are provided. However, the configuration of the plurality of indoor units 50 for the single outdoor unit 1 has a problem that it is difficult to apply as it is when installing two or more outdoor units (1).

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, wherein the refrigerant flowing between the outdoor unit and the indoor unit is guided by a single common pipe and the balance of the refrigerant is maintained between the multiple outdoor units. It is to provide a multi-type air conditioner in which a low pressure common pipe is formed.

Another object of the present invention is to allow branching pipes guiding refrigerant flow to be branched from the common pipe by various distribution schemes.

According to an aspect of the present invention, there is provided a multi-type air conditioner, including: at least one outdoor unit in which heat exchange occurs; A plurality of indoor units in which heat exchange takes place; And a central controller for controlling the operation of the indoor unit and the outdoor unit, and a refrigerant pipe installed between the outdoor unit and the indoor unit to guide the flow of the refrigerant.

The central controller may automatically control the outdoor unit and each indoor unit by MICOM control.

The refrigerant pipe has a configuration comprising a common pipe for guiding the refrigerant entering and exiting the outdoor unit, and a branch pipe for guiding the refrigerant entering and exiting each indoor unit, the branch pipe is the common pipe by a line distribution method Branched separately from.

The refrigerant pipe may include a common pipe for guiding refrigerant entering and exiting the outdoor unit, and a branch pipe for guiding refrigerant entering and exiting each indoor unit, and the branch pipe is configured to share the common pipe by a head distribution method. Characterized in that they are collectively branched from the tube.

The refrigerant pipe may include a common pipe for guiding refrigerant entering and exiting the outdoor unit, and a branch pipe for guiding refrigerant entering and exiting each indoor unit, and the branch pipe is configured by the combination distribution method. It may be branched individually or collectively from the tube.

According to the multi-type air conditioner according to the present invention having such a configuration, there is an advantage that the installation work is convenient.

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

6 is a schematic view showing an installation state of the multi-type air conditioner according to the present invention, and FIG. 7 is a block diagram of the multi-type air conditioner according to the present invention. As illustrated, the outdoor unit 100 includes a constant speed compressor 120, an inverter compressor 120 ′, an accumulator 132, and an outdoor heat exchanger 180 and an outdoor solenoid valve 102 (LEV: linear expansion valve, hereinafter “outdoor LEV”). And the indoor unit 200 includes an indoor heat exchanger 202, an expansion valve 204, and an indoor solenoid valve 206 (LEV: linear expansion valve, hereinafter referred to as 'indoor LEV'). Is done.

In the multi-type air conditioner, a plurality of indoor units 200 are connected to one or more outdoor units 100. The common liquid pipe 210, which is a common pipe through which liquid refrigerant flows, is connected between the outdoor unit 100 and the indoor unit 200, and a gas. The common engine 212, which is a common pipe through which the refrigerant flows, is formed in communication. And between the two or more outdoor unit 100 is installed in communication with the high and low pressure common pipe 214 to maintain the balance of the refrigerant, the common liquid pipe 210 and the common pipe 212 is made of a single pipe.

The high and low pressure common pipe 214 is installed so that the inlet side of the outdoor heat exchanger 180 provided in the plurality of outdoor units 100 communicate with each other, so that the balance of the refrigerant is maintained between the outdoor units 100. Meanwhile, the refrigerant is also introduced into the outdoor heat exchanger 180 of the outdoor unit 100 which is not used among the plurality of outdoor units 100, thereby bringing the effect of improving the heat exchange efficiency. And the high or low pressure common pipe 214 is a high pressure or low pressure refrigerant flows in accordance with the cooling or heating action.

The indoor unit 200 is formed with a branch liquid pipe 210 ', which is a branch pipe through which liquid refrigerant flows, and a branch pipe 212', which is a branch pipe through which gas refrigerant flows, respectively, such a branch liquid pipe 210 'and a branch pipe 212'. ) Is formed in communication with the common liquid pipe 210 and the common engine 212.

In addition, the branch liquid pipe 210 'and the branch engine 212' are separately branched from the common liquid pipe 210 and the common engine 212 by a line distribution method as shown in FIG. That is, the branched liquor pipe 210 'and the branch engine 212', which are branch pipes, are not branched collectively from a predetermined portion of the common liquid pipe 210 and the common engine 212, which are common pipes, but are individually branched at intervals. And connected to each indoor unit 200.

In addition, the plurality of branch liquid pipes 210 'and the branch pipes 212' are different in diameter depending on the capacity of the indoor unit 200 to be connected, and each indoor unit 200 by the indoor LEV 206. The flow rate of the refrigerant supplied to is adjusted.

Meanwhile, the outdoor unit 100 is formed with an outdoor liquid pipe 210 "through which liquid refrigerant flows, and an outdoor engine 212" through which gas refrigerant flows, and the outdoor liquid pipe 210 "and an outdoor engine 212" are respectively formed in the outdoor unit 100. Communicating with the common liquid pipe 210 and the common engine 212.

8 to 10 illustrate 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.

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.

An oil separator 122 is provided at the outlet side of the constant speed compressor 120 and the inverter compressor 120 ', respectively. 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, the oil (oil) used to smoothly drive the pistons (not shown) of the compressors 120 and 120 'and cool the frictional heat generated during the driving is discharged to the outlet of the compressors 120 and 120' together with the refrigerant. The oil in the refrigerant is separated from the oil separator 122 and returned to the compressors 120 and 120 '.

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 arranged 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 of the compressor (120, 120') Or an accumulator), an outdoor heat exchanger 180, and an indoor unit 200.

Meanwhile, a hot gas pipe 125 for allowing 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 will be described below. It is installed across the directional valve (124).

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 outdoor liquid pipe 210 ", the outdoor engine 212", and the high and low pressure common pipe 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 through the pipe inlet 188 ′ of the side panel 188, which will be described below, and are connected to the outdoor unit 100.

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

The supercooler 130 is formed of a double tube. Therefore, the refrigerant passing through the outdoor heat exchanger 180 flows through the central portion and is configured such that the low temperature refrigerant expanded by an expansion valve (not shown) flows in the opposite direction to lower the temperature of the refrigerant.

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 ').

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 backward at a predetermined angle 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. Meanwhile, a tube assembly 180 'is further formed at a side surface of the outdoor heat exchanger 180 to distribute the refrigerant supplied from the compressors 120 and 120' to each part.

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.

Meanwhile, a rear frame 196 is installed at the rear end corner 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.

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. 7 to 10.

As described above, in the air conditioner according to the present invention, a plurality of indoor units 200 are connected to one outdoor unit 100, and some or all indoor units 200 are operated according to a user's selection.

When the air conditioner is operated (cooling operation), the outdoor LEV 102 is opened so that the refrigerant flows between the outdoor unit 100 and the indoor unit 200. At this time, the amount of refrigerant is controlled by the indoor LEV 206 and the indoor LEV 206 of the indoor unit 200 which is not used is closed.

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 the oil separator. Oil passes through 122 and is 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 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 passing through the outdoor heat exchanger 180 is further cooled while passing through the subcooler 130.

The refrigerant passing through the supercooler 130 passes through a dryer (not shown) for removing moisture contained in the refrigerant, and then flows into the indoor unit 200 through the common liquid pipe 210. Meanwhile, some of the refrigerant passing through the compressors 120 and 120 'may be introduced into another outdoor unit 100 through the high and low pressure common pipe 214.

The refrigerant supplied to the other outdoor unit 100 through the high and low pressure common pipe 214 is introduced into the outdoor heat exchanger 180 of the outdoor unit 100 that is stopped to balance the refrigerant pressure as a whole, and the outdoor unit that is stopped ( The predetermined heat exchange also occurs through the outdoor heat exchanger 180 of 100).

When the refrigerant is supplied to the indoor unit 200 through the common liquid pipe 210, the refrigerant is supplied to each indoor unit 200 in operation through the branched liquid pipe 210 ′ branched from the common liquid pipe 210. The refrigerant is decompressed in the expansion valve 204 and heat exchanges in the indoor heat exchanger 202. At this time, since the indoor heat exchanger 202 serves as an evaporator, the refrigerant becomes low pressure gas through heat exchange.

The refrigerant discharged from the indoor heat exchanger 202 is collected through the branch engine 212 ′ to the common engine 212 and then flows into the outdoor unit 100. The refrigerant introduced into the outdoor unit 100 through the common engine 212 and the outdoor engine 212 ″ enters the accumulator 132 through the four-way valve 124.

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, when operating in the heating operation, the refrigerant flows in the opposite direction to the above, the indoor LEV 206 of the indoor unit 200 is opened, the amount of refrigerant is controlled in the outdoor LEV (102).

Next, looking at the air flow in the outdoor unit 100, the fan motor 172 is driven in accordance with the application of power to drive the blowing fan 170. When the blowing fan 170 is rotated, outside air is introduced into the inside through the front grill 114 and the rear grill 190.

Air introduced into the outdoor unit 100 undergoes heat exchange while passing through the outdoor heat exchanger 180. At this time, when the air conditioner acts as cooling, the outside air receives heat from the outdoor heat exchanger 180 and becomes high temperature air. Becomes

The air passing through the outdoor heat exchanger 180 is forcedly blown upward by the blower fan 170, and the shroud 164 guides the upward discharge of air.

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.

For example, in the above embodiment, the branch liquid pipe 210 'and the branch engine 212' are configured to be separately branched from the common liquid pipe 210 and the common engine 212 by a line distribution method. As shown in FIG. 11, it may be possible for the branch pipes 210 'and 212' to be branched by a head distributing method which is collectively branched at a predetermined portion of the common pipes 210 and 212. 212 ′ is a pipe corresponding to the branch liquid pipe 210 ′ and the branch engine 212 ′ in the embodiment, and the common pipes 210 and 212 are the common liquid pipe 210 and the common engine 212 in the embodiment. And corresponding piping.)

In addition to the above-described line distribution method or head distribution method, as shown in FIG. 12, the line distribution method and the head distribution method may be branched by a combined distribution method. That is, the line distribution method and the head distribution method are appropriately used according to the installation environment of the indoor unit 200.

And Figure 13 is a bird's eye view of a state in which the outdoor unit 100 and the indoor unit 200 as described above is installed in a high-rise building, such as a building.

As shown in the figure, the central controller 300 is installed at one side of the outdoor unit 100. The central controller 300 controls the operation of the outdoor unit 100 and each indoor unit 200 by MICOM control, and may be configured as a simple central controller and an advanced central controller.

The central controller 300 is configured to communicate with the indoor unit 200, the outdoor unit 100, and a distributor (not shown) by multilateral communication, and is also configured to be connected to the Internet to enable internet control. do.

As described above, in the multi-type air conditioner according to the present invention, the common liquid pipe and the common engine are respectively communicated between the outdoor unit and the indoor unit to guide the flow of the refrigerant. That is, the air conditioner of the present invention is an inverter multi system in which a refrigerant pipe connected to one outdoor unit is configured in series with a single pipe.

Therefore, there is no need to install each liquid pipe and engine corresponding to the indoor unit quantity, there is an advantage that the production cost of the pipe is reduced. In addition, since the number of pipes is reduced, the labor required for installing the pipe is reduced, and since the pipe can be used as a long pipe, the overall convenience of installation of the air conditioner is improved.

As a result, the multi-type air conditioner according to the present invention can freely install various types of indoor units and has an efficient piping structure with a free design, which makes it easy to install while increasing its capacity and has an excellent energy saving effect.

In addition, in the present invention, since a plurality of outdoor units are communicated with each other by the high and low pressure common pipe, it is possible to maintain the balance of the refrigerant and to improve the heat exchange efficiency of the air conditioner as a whole because the outdoor heat exchanger is also used.

In the present invention, since the outdoor unit and the indoor unit are controlled by the MICOM MICOM, it is not necessary to provide a separate machine room. Therefore, the space required for installing the air conditioner is reduced.

In addition, in the present invention, the branch pipe (branch liquid pipe and branch engine) is connected from the common pipe (common liquid pipe and common engine) by the line distribution method or the head distribution method, or a combination distribution method in which the line distribution method and the head distribution method are mixed. Is connected by. Therefore, there is an advantage that the installation efficiency of the air conditioner is improved.

1 is an installation state 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 perspective view showing the appearance of a conventional multi-type air conditioner.

Figure 4 is an exploded perspective view showing the configuration of a conventional multi-type air conditioner outdoor unit.

5 is an internal front view of a state in which the front panel of the conventional multi-type air conditioner outdoor unit is removed.

6 is a state diagram of the multi-type air conditioner according to the present invention.

Figure 7 is a block diagram showing the configuration and refrigerant flow of the multi-type air conditioner according to the present invention.

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

9 is an exploded perspective view of an outdoor unit constituting a multi-type air conditioner according to the present invention;

10 is an internal front view of the front panel of the multi-type air conditioner outdoor unit of the present invention is removed.

11 is a conceptual diagram schematically showing a state in which the outdoor unit and the indoor unit of the multi-type air conditioner according to the present invention are connected by a head distribution method.

12 is a conceptual diagram schematically showing a state in which the outdoor unit and the indoor unit of the multi-type air conditioner according to the present invention are connected by a combination distribution method.

Figure 13 is a perspective view of the building schematically showing the installation state 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

125. Hot gas pipe 125 '. Hot Gas Valve

126. Valve Support 128. Service Valve

130. 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

200. Indoor unit 202. Indoor heat exchanger

204. Expansion valve 206. Indoor solenoid valve

210. Common fluid line 210 '. Basin

210 ". Outdoor liquid pipe 212. Common pipe

212 '. Branches 212 ". Outdoor

214. High and low pressure common pipe

Claims (5)

One or more outdoor units in which heat exchange takes place; A plurality of indoor units in which heat exchange takes place; A central controller for controlling the operation of the indoor unit and the outdoor unit; The multi-type air conditioner is installed between the outdoor unit and the indoor unit, the configuration comprising a refrigerant pipe for guiding the flow of the refrigerant. The multi-type air conditioner according to claim 1, wherein the central controller automatically controls the outdoor unit and each indoor unit by MICOM control. The method of claim 1, wherein the refrigerant pipe, A common pipe for guiding the refrigerant entering and leaving the outdoor unit; It has a configuration including a branch pipe for guiding the refrigerant entering and exiting each indoor unit, The branch pipe is a multi-type air conditioner, characterized in that branched separately from the common pipe by a line distribution method. The method of claim 1, wherein the refrigerant pipe, A common pipe for guiding the refrigerant entering and leaving the outdoor unit; It has a configuration including a branch pipe for guiding the refrigerant entering and exiting each indoor unit, And the branch pipe is collectively branched from the common pipe by a head distribution method. The method of claim 1, wherein the refrigerant pipe, A common pipe for guiding the refrigerant entering and leaving the outdoor unit; It has a configuration including a branch pipe for guiding the refrigerant entering and exiting each indoor unit, The branch pipe is a multi-type air conditioner, characterized in that branched separately or collectively from the common pipe by a combination distribution method.