KR20090019302A - Pipe connection searching apparatus of the multi air conditioner system - Google Patents

Abstract

A pipe connection searching device of a multi-type air conditioner is provided to automatically match a pipe with a wire without the intervention of a worker after searching the pipe and the wire for a predetermined indoor unit. A plurality of indoor units(110) are respectively mounted with temperature sensors(111). A pipe opening/closing part(120) selectively opens or closes a plurality of pipes coupled with an outdoor unit(130). A pipe searching part(131) controls the pipe opening/closing part to open one of the pipes and drives the outdoor unit for checking temperature difference generated before and after the opening of the one pipe, so as to determine the one pipe is opened for one of the indoor unit, wherein the one indoor unit exhibits a set temperature difference first.

Description

Pipe connection searching apparatus of the multi air conditioner system

The present invention relates to a pipe search apparatus for a multi-air conditioner. More specifically, the present invention relates to a device capable of searching for which indoor unit a pipe of a plurality of pipes connected to the outdoor unit is connected to an outdoor unit to which a plurality of indoor units are connected. will be.

An air conditioner is an air conditioner that keeps indoor air in a comfortable state. Usually, it is called an air conditioner. However, in recent years, an air conditioner is often added, and an air conditioner is an indoor unit. And the air conditioner has developed from the one-to-one correspondence to the multi-air conditioners, in which a plurality of indoor units are connected to one outdoor unit.

Multi air conditioner is an air conditioner that eliminates the trouble of having to purchase and install an air conditioner for each space in a structure in which a plurality of spaces are provided by using a single outdoor unit to drive a plurality of indoor units. Fig. 1 schematically shows the configuration of a multi air conditioner.

Referring to FIG. 1, it can be seen that the pipe 30 and the wiring 40 drawn from the plurality of indoor units 20 are connected to one outdoor unit 10.

In FIG. 1, the pipe 30 and the wire 40 are respectively connected to the outdoor unit, but in reality, a plurality of pipes may be combined into one by using a service port or the like to be introduced into the outdoor unit 10. Such parts will not be mentioned.

What is important is that the installer connects a plurality of pipes and wires to the outdoor unit (including a port disposed near the outdoor unit), and the installer must connect the pipes and wires to the corresponding indoor unit.

The wiring 40 has a plurality of internal lines, such as a power line, a communication line, and a ground line, each formed in a bundle, so that crosstalk between each of the wirings 40 is less likely to occur. Since the operation of the outdoor unit itself is not made, it is possible for the installer to easily recognize a different color for each inner line.

The wire 40 is connected to the outdoor unit like a pipe drawn out from the same indoor unit. In the position of the installer located in the outdoor unit, the pipe of the indoor unit and the pipe connected to the outdoor unit exist because the wiring is not exposed to the outside. It is difficult to know which indoor unit the wiring is drawn out from.

Of course, even if the wiring is connected to a different position, the air conditioner does not operate as if the internal wiring forming the wiring is incorrectly connected, but there is no problem of operating the indoor unit other than the indoor unit desired by the user. Can cause confusion.

This crosstalk not only causes inconvenience to the user, but also affects the reliability of the product. Therefore, a method of installing the outdoor unit by matching the pipe and the wiring corresponding to the predetermined indoor unit is required. The search for corresponding piping and wiring is required.

An object of the present invention is to provide a pipe search apparatus that enables a pipe and a wire drawn out from each indoor unit to be located at a location of an outdoor unit in a multi air conditioner in which a plurality of indoor units are connected to one outdoor unit.

In addition, after searching for pipes and wires corresponding to a predetermined indoor unit, the pipes and wires are automatically matched without the intervention of the installer to provide convenience to the installer or the user.

Based on this, it is intended to provide a multi air conditioner that is easy to install.

In order to achieve the above object, the present invention includes a temperature sensor formed in each of a plurality of indoor units; A pipe opening and closing unit for selectively opening and closing a plurality of pipes fastened to the outdoor unit; And controlling the pipe opening / closing unit so that only one of the plurality of pipes connected to the outdoor unit is opened through the pipe opening / closing unit, and driving the outdoor unit to check the temperature difference of the temperature sensor before and after opening in real time. It characterized in that it comprises a pipe search unit for determining that the opened pipe is connected to the indoor unit shown first.

The outdoor unit may further include a wiring display unit configured to display a connection point of the outdoor unit to which a wire of an indoor unit indicating the first predetermined temperature difference is connected to a user, and further, the outdoor unit includes the opened pipe and the outdoor unit. It is preferable to further include a wiring matching unit for matching the wiring of the indoor unit which represents the first predetermined temperature difference connected to.

In this case, it is preferable that the indoor unit does not drive an indoor fan.

In addition, the present invention is a temperature sensor formed in each of the plurality of indoor units; A pipe opening and closing unit for selectively opening and closing a plurality of pipes fastened to the outdoor unit; And controlling the pipe opening and closing unit so that only one pipe of the plurality of pipes connected to the outdoor unit is opened through the pipe opening and closing unit, and driving the outdoor unit to check a temperature change of the temperature sensor to reach a preset temperature. It is characterized in that it comprises a pipe search unit for determining that the opened pipe is connected.

Preferably, the pipe search unit excludes a temperature change check for a pipe in which connection determination is completed and an indoor unit connected to the pipe when searching for another pipe, and the outdoor unit includes the outdoor unit to which the wires of the indoor unit that have reached the predetermined temperature are connected. The apparatus may further include a wiring display unit configured to display a connection point of the user, and further include a wiring matching unit configured to match the opened pipe and the wiring of the indoor unit having reached the predetermined temperature connected to the outdoor unit.

Similarly, the indoor fan of the indoor unit is not driven.

In addition, the present invention is a temperature sensor formed in each of the plurality of indoor units; A pipe opening and closing unit for selectively opening and closing a plurality of pipes fastened to the outdoor unit; And controlling the pipe opening and closing part so that only one pipe of the plurality of pipes connected to the outdoor unit is opened through the pipe opening and closing part, and driving the outdoor unit to check a temperature change of a temperature sensor to reach a preset temperature. If there is, it is another feature that comprises a pipe search unit for checking the temperature of each indoor unit and determines that the opened pipe is connected to the indoor unit showing the largest temperature difference compared to the temperature measured before opening.

The outdoor unit may further include a wiring display unit configured to display a connection point of the outdoor unit to which a wire of an indoor unit having the largest temperature difference is connected, to the user, wherein the outdoor unit is connected to the open pipe and the outdoor unit. It is preferable to further include a wiring matching unit for matching the wiring of the indoor unit showing the temperature difference. In addition, it is preferable that the indoor unit does not drive the indoor fan in the search process.

In addition, the present invention is a temperature sensor formed in each of the plurality of indoor units; A pipe opening and closing unit for selectively opening and closing a plurality of pipes fastened to the outdoor unit; And controlling the pipe opening and closing part so that only one pipe of the plurality of pipes connected to the outdoor unit is opened through the pipe opening and closing part, and driving the outdoor unit for a predetermined time to check the temperature difference of the temperature sensor before and after opening to show the largest temperature difference. Another feature is to include a pipe search unit for determining that the opened pipe is connected to the indoor unit.

The outdoor unit further includes a wire display unit for displaying a connection point of the outdoor unit to which a wire of an indoor unit having the largest temperature difference is connected to the user, and further showing the opened pipe and the largest temperature difference connected to the outdoor unit. It is preferable to further include a wiring matching portion for matching the wiring of the indoor machine.

At this time, the indoor unit preferably does not drive the indoor fan.

As described above, the pipe search apparatus according to the present invention opens only one pipe selectively among a plurality of pipes connected to the outdoor unit, and then measures the temperature of each indoor unit to search for the indoor unit corresponding to the opened pipe. By making the outdoor unit connection position of the wiring drawn out from the indoor unit correspond to the opened pipe, the pipe and the wiring can be calibrated to the indoor unit, and as a result, the installation of the multi-air conditioner can be easily performed.

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

2 is a schematic diagram showing a pipe searching apparatus according to a preferred embodiment of the present invention.

Referring to FIG. 2, the pipe searching apparatus according to the present embodiment includes a temperature sensor 111 formed in each of the plurality of indoor units 110; Pipe opening and closing unit 120 for selectively opening and closing the plurality of pipes fastened to the outdoor unit 130; And controlling the pipe opening and closing unit 120 so that only one pipe of the plurality of pipes connected to the outdoor unit 130 is opened through the pipe opening and closing unit 120, and driving the outdoor unit 130 to open and close the temperature. And a pipe search unit 131 for checking the temperature difference of the sensor in real time and determining that the opened pipe is connected to the indoor unit that displays the predetermined temperature difference first.

The temperature sensor 111 measures the temperature using a change in the output voltage according to the temperature change, and it is preferable to use the temperature sensor provided in the existing indoor unit as it is.

The pipe opening / closing unit 120 selectively opens and closes a plurality of pipes connected to the outdoor unit 130, and generally includes a valve.

The pipe opening and closing unit 120 may be opened and closed by an installer, but in this embodiment, the pipe opening and closing unit 120 is automatically opened and closed through the pipe search unit 131.

The pipe search unit 131 allows only any one of the pipes to be opened to the plurality of pipes connected to the outdoor unit 130 at a temporary point through the pipe opening / closing unit 120 to drive the outdoor unit 130. The outdoor unit 130 measures the temperature through the temperature sensor 111 provided in each indoor unit 110 before and after the drive, and the indoor unit with the temperature sensor 111 indicating the predetermined temperature difference first. It is determined to be connected to.

By closing the opened pipe and opening another pipe to repeat the operation of the pipe search unit 131, it becomes possible to grasp the indoor unit 110 corresponding to all pipes connected to the outdoor unit 130.

The point to consider here is that the meaning of grasping the indoor unit may include checking that the installer moves around each indoor unit, but receives information output from the temperature sensor of the indoor unit through wires drawn from each indoor unit connected to the outdoor unit. It is desirable to judge. In this way, the installer can perform all the search at the location of the outdoor unit. In this case, the meaning of grasping the indoor unit will be in line with the meaning of grasp the wire drawn out from the indoor unit. In addition, the pipe search unit is preferably formed in the outdoor unit, may be formed in any one of the indoor unit.

Going back, after determining the pipe corresponding to each indoor unit 110 can consider two ways to take measures.

First, there is a method including a wiring display unit for displaying a connection point of the outdoor unit connected to the wiring of the indoor unit, which displays the predetermined temperature difference first, and the outdoor unit is connected to the opened pipe and the outdoor unit. There is a method of providing a wiring matching unit for matching the wiring of the indoor unit having the first predetermined temperature difference.

The former is a method for installing an indoor unit corresponding to a pipe or a wire display unit displaying the wires drawn from the indoor unit to the outdoor unit so that the installer can recognize the connection state so that the installer can properly perform the connection. To explain.

Referring to FIG. 3, there is a portion between the outdoor unit 130 and the plurality of indoor units 110 that is difficult to be grasped by the installer, which is how the pipes and the wiring are arranged. In detail, the pipe / wiring installation space 140 may include a lower portion of the floor floor, a pillar, a ceiling, and the like that are not exposed to the outside.

In addition, in FIG. 3, the piping opening-and-closing part which is arrange | positioned near an outdoor unit or near outdoor unit is abbreviate | omitted for convenience of description.

For the pipe search, the pipes and the wires expected to correspond to each other are connected to the outdoor unit 130, and only the pipe A is opened, and the remaining pipes B, C, ... are closed.

Thereafter, when the outdoor unit 130 is driven, a temperature difference of any one of the plurality of indoor units 110 is first displayed as a predetermined temperature difference. At this time, the indoor unit may be determined as an indoor unit connected to the opened pipe A. Do.

Since the installer will be at the location of the outdoor unit 130, a wire display unit 133 is formed in the outdoor unit 130 to connect the wires drawn from the indoor units 110 to display the installer.

Specifically, the wiring display unit may display the temperature of each indoor unit, and the lamp may be turned on only at the position where the wire corresponding to the indoor unit first showing the preset temperature difference by simple blinking is connected.

In other words, it is sufficient to show the installer to which position of the outdoor unit the wiring corresponding to the indoor unit which indicates the predetermined temperature difference first, and if the wiring display unit a corresponding to the opened pipe A reacts, the correct installation is performed. When the wiring display portion b or c reacts, the wiring is incorrectly installed.

In this case, the installer may replace the wiring connected to the wiring display unit b or c in which the reaction is displayed with the wiring connected to the wiring display unit a corresponding to the opened pipe. Here, the pipe can be changed in connection, but once the pipe is installed, the desorption process can be cumbersome and the fastening strength can be weakened. Therefore, the replacement of the pipe is not recommended and the replacement of the wire is preferable.

In this way, the wiring a corresponding to the pipe A is correctly connected, and the wiring corresponding to each pipe can be correctly connected by closing the pipe A, opening the next pipe, and repeating the above process.

On the other hand, the method of using the wiring matching unit is a method for the convenience of the installer by automatically connecting the wiring to the corresponding pipe without replacing the wiring by the installer.

Referring to FIG. 4, it can be seen that the wiring matching unit 135 is further provided in the configuration of FIG. 3. The wiring matching unit 135 includes the wiring display unit 133 directly or directly as described above. Is connected via

When the wiring A is opened and the search is performed, and the wiring corresponding to the indoor unit that has reached the predetermined temperature difference first is the wiring connected to the wiring display unit c, the wiring matching unit matches the wiring connected to the pipe A and the wiring display unit c. .

Specifically, if it is determined which pipe is opened and it is determined by the search that the wiring to be connected to the position of the pipe is connected to another position, the wiring that is connected to the other position by the internal circuit is Switching to correspond to the opened pipe.

4, the wiring matching unit 135 performs the same operation as the switching and the wiring connected to the wiring display unit c when it is determined that the wiring corresponding to the pipe A is the wiring connected to the wiring display unit c as in the previous example. Connect to the position corresponding to this pipe A.

According to this method, the installer does not need to replace the wiring and does not intervene in the action after the pipe search, and if the opening and closing of the pipe is automatically performed, both the pipe search and the after action are automatically performed. do.

On the other hand, the predetermined temperature difference may be stored in advance in the pipe search unit or can be set directly by the installer according to the site, it is preferable to set within the range of 5 ℃ ~ 15 ℃.

This is because when the preset temperature difference is less than 5 ° C., the temperature difference can be reached first in an indoor unit (wiring) other than an indoor unit (wiring) substantially corresponding to the search error, that is, the opened pipe. Such a problem is caused by not controlling the flow of a small amount of refrigerant even though only one pipe is opened and other pipes are closed. When the indoor unit is installed in a position where a temperature difference may occur even with a small amount of refrigerant. Is more problematic. Therefore, in view of the above problem, it is preferable to set the preset temperature difference to 5 ° C. or more in which the temperature difference of the indoor unit connected to the opened pipe is more reliably spread than the temperature difference of other indoor units.

However, if the predetermined temperature difference is set too large, the search time is increased, so it is desirable to limit the search to 15 ° C. or less so that the search can be performed within a short time.

The temperature difference is measured by comparing the temperature measured before opening with the temperature measured in real time after opening. In some cases, the temperature difference may be measured. It is preferable to apply when setting near 15 degreeC.

On the other hand, it is preferable that each indoor unit does not drive the indoor fan during the search process, so that the temperature sensor located inside the indoor unit accurately checks the temperature change inside the indoor unit without being influenced by the outside.

The outdoor unit may be either a cooling operation or a heating operation during pipe search.

Referring to FIG. 5, the operation of the pipe searching apparatus according to the present embodiment will be described. First, only one pipe is selectively opened, and all other pipes are closed (S 110).

Thereafter, the primary temperature of each indoor unit is measured and the outdoor unit is driven (S 120). At this time, the primary temperature is a value to be compared with the secondary temperature to be measured, and the predetermined storage until the comparison is completed. Store in wealth. The primary temperature may be made before driving the outdoor unit or at an initial stage of driving the outdoor unit.

After that, the secondary temperature of each indoor unit is measured in real time or at regular time intervals (S 130). By deriving the temperature difference between the secondary temperature and the primary temperature, is there an indoor unit that satisfies a preset temperature difference? It is determined (S 140). If there is no indoor unit satisfactory, the second temperature measuring step and the temperature difference checking step are repeated.

If there is a indoor unit satisfactory, it is determined that the satisfactory indoor unit is connected to the opened pipe (S 150), and the result is displayed to the outside, or the wire drawn out from the indoor unit is matched with the opened pipe.

If there is a pipe that has not been inspected (S 160), only one of the pipes that have not been inspected is opened and the rest is closed (S 170), and then starts again from the first temperature measurement step.

For reference, if only one last pipe is left, only one unconfirmed indoor unit will be left, so the inspection of the last pipe is omitted and it can be seen that it is connected to the remaining indoor unit.

In the above description, a pipe search unit is provided which determines only an indoor unit connected to the opened pipe by opening only one pipe selectively selected, checking the temperature difference before and after the opening, and checking the temperature difference before and after the opening.

Another way to explore the pipe search will be described.

A temperature sensor formed in each of the plurality of indoor units; A pipe opening and closing unit for selectively opening and closing a plurality of pipes fastened to the outdoor unit; And controlling the pipe opening and closing part so that only one pipe of the plurality of pipes connected to the outdoor unit is opened through the pipe opening and closing part, and after driving the outdoor unit, checking a temperature change of a temperature sensor to reach a predetermined temperature first. Since the pipe search unit determines that the opened pipe is connected to the indoor unit, the overall configuration is similar to the embodiment of FIG. 2, but there may be a method of showing a difference in the pipe search unit.

The pipe search unit determines that the indoor unit that reaches the preset temperature first, not the preset temperature difference, is connected to the opened pipe, and has the following advantages.

When the installer directly replaces the wiring by using the wiring display unit, it is preferable to form a display unit indicating the temperature of each indoor unit in the outdoor unit to induce the judgment by the installer to recognize the temperature. In this case, it may be inconvenient to check the temperature before the opening and keep track of the temperature to perform a separate operation. However, when determining whether a certain temperature is reached, rather than a constant temperature difference, the installer can easily grasp and thus the installer's search is advantageous.

When using a predetermined temperature value, the operation mode of the outdoor unit, that is, the cooling operation and the heating operation should be determined in consideration of the current temperature. That is, when the preset temperature is higher than the current room temperature, heating operation should be performed, and if it is lower than the current temperature, cooling operation should be performed.

In addition, in consideration of the fact that the temperature value should be changed fluidly according to the current temperature, it is preferable that a database is provided to determine how many degrees the preset temperature value is when the current temperature is.

In addition, the pipe search unit may exclude the temperature change check for the pipe that has been determined to be connected and the indoor unit connected to the pipe when searching for other pipes, which is already searched when searching for another pipe when using a preset temperature value. This is to prepare for the case where the temperature of the indoor unit connected to the completed pipe maintains the preset temperature value.

As in the embodiment of FIG. 2, the outdoor unit may further include a wiring display unit displaying a connection point of the outdoor unit to which the wire of the indoor unit has reached the predetermined temperature, or automatically matching the pipe with the wire after searching. To this end, the outdoor unit may further include a wiring matching unit for matching the opened pipe and the wiring of the indoor unit having reached the predetermined temperature connected to the outdoor unit.

In addition, the indoor unit does not drive the indoor fan, it is preferable to minimize the influence of the temperature sensor disposed inside the indoor unit from the outside and to measure the temperature only by the indoor unit temperature.

The operation is briefly described with reference to FIG. 6, after selectively opening the pipe (S 210), and driving the outdoor unit (S 220), until each indoor unit that satisfies the preset temperature appears (S 240). Perform a temperature measurement of (S 230). If there is an indoor unit that satisfies a predetermined temperature first, it is determined that the indoor unit is connected to the opened pipe (S 250), and the above process is repeated for the remaining pipes (S 260) (S 270).

On the other hand, the pipe opening and closing control unit so that only one of the plurality of pipes connected to the outdoor unit through the pipe opening and closing unit is opened, there is an indoor unit that reaches the predetermined temperature by driving the outdoor unit to check the temperature change of the temperature sensor In addition, it is possible to form a pipe search unit that checks the temperature of each indoor unit and determines that the opened pipe is connected to the indoor unit having the largest temperature difference compared to the temperature measured before opening.

In the form of a mixture of the two embodiments described above, determining whether the indoor unit has reached a predetermined temperature, if there is an indoor unit has reached a predetermined temperature is determined that the indoor unit having the largest temperature difference before and after opening is connected to the opened pipe In the process of the step, using the preset temperature is to ensure that the temperature difference of the indoor unit connected to the opened pipe before and after the operation of the outdoor unit is reliably distinguished from the temperature difference of the other indoor unit.

Looking at the operation with reference to Figure 7, after selectively opening the pipe (S 310), by measuring the primary temperature of each indoor unit and driving the outdoor unit (S 320), when the indoor unit that satisfies the preset temperature appears Until (S 340) to measure the secondary temperature of each indoor unit (S 330). If there is an indoor unit that satisfies the preset temperature, the difference between the primary temperature and the secondary temperature of each indoor unit is analyzed to determine that the indoor unit having the largest temperature difference is connected to the opened pipe (S 350), and the rest of the above process is performed. The pipe is repeatedly performed (S 360) (S 370).

Also in this case, the wiring display unit for displaying a connection point of the outdoor unit connected to the indoor unit having the largest temperature difference or the opened pipe is matched with the wiring of the indoor unit having the largest temperature difference connected to the outdoor unit. The apparatus may further include a wire matching unit, and the indoor unit may not drive the indoor fan during the search.

On the other hand, the temperature sensor is formed in each of the plurality of indoor units; Pipe opening and closing unit for selectively opening and closing the plurality of pipes fastened to the outdoor unit; And controlling the pipe opening and closing part so that only one pipe of the plurality of pipes connected to the outdoor unit is opened through the pipe opening and closing part, and driving the outdoor unit for a predetermined time to check the temperature difference between the temperature sensor before and after driving to show the largest temperature difference. A pipe search apparatus having a pipe search unit for determining that the opened pipe is connected to the indoor unit is also possible.

Looking at the operation with reference to Figure 8, after selectively opening the pipe (S 410), by measuring the primary temperature of each indoor unit and driving the outdoor unit (S 420), and driving the outdoor unit for a predetermined time (S 440) and then measures the secondary temperature of each indoor unit (S430). It is determined that the indoor unit showing the largest temperature difference by comparing the primary temperature and the secondary temperature is connected to the opened pipe (S 450), and the above process is repeated for the remaining pipes (S 460) (S 470). ).

In the above, the secondary temperature was continuously measured for a predetermined time, but the secondary temperature measuring step (S 430) was performed after a predetermined time lapse determination step (S 440) to measure only once after a predetermined time has elapsed. It may be configured.

In this way, the secondary temperature measurement algorithm is simplified because the secondary temperature needs to be measured only once after a certain period of time without having to continuously measure the secondary temperature.

As in the other schemes described above, the outdoor unit includes a wire display unit for displaying a connection point of the outdoor unit to which the wire of the indoor unit having the largest temperature difference is connected, or the open pipe and the outdoor unit connected to the outdoor unit. It may further include a wiring matching unit for matching the wiring of the indoor unit showing a large temperature difference. In addition, the indoor unit preferably does not drive the indoor fan during the search process.

It is applicable to a multi air conditioner in which a plurality of indoor units are connected to one outdoor unit.

1 is a schematic view showing the configuration of a multi air conditioner.

2 is a schematic view showing a pipe searching apparatus according to an embodiment of the present invention.

3 is a schematic view showing a state of performing a pipe search using the pipe search apparatus of FIG.

4 is a schematic view showing another example of FIG.

5 is a flowchart illustrating an operation of a pipe search apparatus according to an exemplary embodiment of the present invention.

6 to 8 are flowcharts illustrating another example of FIG. 5.

* Description of the symbols for the main parts of the drawings *

110 ... Indoor 111 ... Temperature Sensor

120.Pipe opening and closing part 130 ... Outdoor unit

131 Piping search 133 Wiring indicator

135.wiring matching part

Claims (17)

A temperature sensor formed in each of the plurality of indoor units; A pipe opening and closing unit for selectively opening and closing a plurality of pipes fastened to the outdoor unit; And An indoor unit which controls the pipe opening and closing unit so that only one pipe of the plurality of pipes connected to the outdoor unit is opened through the pipe opening and closing unit, and drives the outdoor unit to check a temperature difference between the temperature sensor before and after opening and to display a predetermined temperature difference first. Pipe search unit for determining that the opened pipe is connected to the Piping navigation device for a multi air conditioner comprising a. The method according to claim 1, The outdoor unit is a wiring display unit for displaying to the user a connection point of the outdoor unit to which the wiring of the indoor unit indicating the first predetermined temperature difference is connected Piping navigation device for a multi-air conditioner, characterized in that it further comprises. The method according to claim 1 or 2, The outdoor unit is a wiring matching unit for matching the opened pipe and the wiring of the indoor unit representing the first predetermined temperature difference connected to the outdoor unit Piping navigation device for a multi-air conditioner, characterized in that it further comprises. The method according to claim 1 or 2, And the indoor unit does not drive an indoor fan. A temperature sensor formed in each of the plurality of indoor units; A pipe opening and closing unit for selectively opening and closing a plurality of pipes fastened to the outdoor unit; And Controls the pipe opening and closing unit so that only one pipe of the plurality of pipes connected to the outdoor unit is opened through the pipe opening and closing unit, and after driving the outdoor unit, checking the temperature change of the temperature sensor to reach the predetermined temperature first. Pipe search unit for determining that the opened pipe is connected to the Piping navigation device for a multi air conditioner comprising a. The method according to claim 5, The pipe search unit pipe search apparatus of the multi-air conditioner, characterized in that the connection determination is completed, and the temperature change check for the indoor unit connected to the pipe is excluded in the search of other pipes. The method according to claim 5 or 6, The outdoor unit is a wiring display unit for displaying a connection point of the outdoor unit connected to the wiring of the indoor unit has reached the predetermined temperature to the user Piping navigation device for a multi-air conditioner, characterized in that it further comprises. The method according to claim 5 or 6, The outdoor unit is a wiring matching unit for matching the opened pipe and the wiring of the indoor unit has reached the predetermined temperature connected to the outdoor unit Piping navigation device for a multi-air conditioner, characterized in that it further comprises. The method according to claim 5 or 6, And the indoor unit does not drive an indoor fan. A temperature sensor formed in each of the plurality of indoor units; A pipe opening and closing unit for selectively opening and closing a plurality of pipes fastened to the outdoor unit; And When the pipe opening and closing part is controlled so that only one of the plurality of pipes connected to the outdoor unit is opened through the pipe opening and closing part, and there is an indoor unit which reaches a preset temperature by checking the temperature change of the temperature sensor by driving the outdoor unit. The pipe search unit checks the temperature of each indoor unit and determines that the opened pipe is connected to the indoor unit having the largest temperature difference compared to the temperature measured before opening. Piping navigation device for a multi air conditioner comprising a. The method according to claim 10, The outdoor unit wiring display unit for displaying to the user the connection point of the outdoor unit is connected to the wiring of the indoor unit showing the largest temperature difference Piping navigation device for a multi-air conditioner, characterized in that it further comprises. The method according to claim 10 or 11, The outdoor unit is a wiring matching unit for matching the opened pipe and the wiring of the indoor unit showing the largest temperature difference connected to the outdoor unit Piping navigation device for a multi-air conditioner, characterized in that it further comprises. The method according to claim 10 or 11, And the indoor unit does not drive an indoor fan. A temperature sensor formed in each of the plurality of indoor units; A pipe opening and closing unit for selectively opening and closing a plurality of pipes fastened to the outdoor unit; And An indoor unit showing the largest temperature difference by controlling the pipe opening and closing part so that only one pipe of the plurality of pipes connected to the outdoor unit is opened through the pipe opening and closing part, and driving the outdoor unit for a predetermined time to check the temperature difference between the temperature sensor before and after driving. Pipe search unit for determining that the opened pipe is connected to the Piping navigation device for a multi air conditioner comprising a. The method according to claim 14, The outdoor unit wiring display unit for displaying to the user the connection point of the outdoor unit is connected to the wiring of the indoor unit showing the largest temperature difference Piping navigation device for a multi-air conditioner, characterized in that it further comprises. The method according to claim 14 or 15, The outdoor unit is a wiring matching unit for matching the opened pipe and the wiring of the indoor unit showing the largest temperature difference connected to the outdoor unit Piping navigation device for a multi-air conditioner, characterized in that it further comprises. The method according to claim 14 or 15, And the indoor unit does not drive an indoor fan.

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