KR100204818B1 - Performance detecting apparatus of both cooling and heating function package airconditioner - Google Patents

Abstract

The present invention provides a performance tester for a combined air-conditioning and outdoor package air conditioner outdoor unit that can be used for the performance test of all air-conditioning outdoor unit regardless of the size and capacity of the air conditioner outdoor unit to be assembled. The present invention is connected to the refrigerant line of the outdoor unit of the air conditioner to be inspected, and the refrigerant pipe forming a closed circulation path with the refrigerant line; A heat exchanger installed in the middle of the refrigerant pipe, the heat exchanger being divided into at least two heat exchangers and connected to and installed in parallel with the refrigerant pipe; A shutoff valve for selectively blocking flow paths to the heat exchange parts of the heat exchanger; A capillary tube connected and installed in series along one side of the refrigerant pipe; A check valve connected and installed in series on one side of the refrigerant pipe to allow the refrigerant to pass only during the cooling mode operation; A heating capillary tube connected to and installed in parallel with the check valve in the middle of one side of the refrigerant pipe; And a pressure sensor installed at the other side of the refrigerant pipe to measure the pressure of the refrigerant circulating. The present invention as described above can be inspected while adjusting the capacity of the heat exchanger according to the size of the air conditioner outdoor unit to be inspected, for example, square water and capacity. That is, by automatically or manually adjusting the shutoff valves installed at the high pressure side and the low pressure side refrigerant line connecting portions of each heat exchanger constituting the heat exchanger, the performance inspection can be performed while adjusting the capacity of the heat exchanger according to the capacity of the inspected object.

Description

Performance tester for outdoor air conditioner package

The present invention relates to a device for inspecting the performance of the assembled product in the manufacturing process of the air conditioner outdoor unit, and in particular, regardless of the size or capacity of the air conditioner outdoor unit to be assembled can be common to the performance test of all air-conditioning outdoor unit package combined air conditioning. The present invention relates to a performance tester for an outdoor unit of a cooling / heating combined package air conditioner.

In the process of manufacturing the air conditioner outdoor unit, the basic performance test is performed on the assembled product according to the performance test test item of the product. Such a performance test of the assembled air conditioner outdoor unit is usually performed using a performance test apparatus as shown in FIG. It is used as follows.

1 is a view showing a structure and a connection state of an outdoor unit for a performance tester of a conventional air-conditioner outdoor unit for a cooling and heating package. In the drawing, reference numeral 100 denotes a performance tester, and 200 denotes an air conditioner outdoor unit.

As shown in the figure, in the performance testing apparatus of a conventional package air conditioner outdoor unit, refrigerant pipes 2 and 3 are connected to both sides of a heat exchanger 1, and a pressure gauge 4 is installed in the refrigerant pipe 3. The refrigerant pipe 2 is provided with a capillary tube 5 and a check valve 7 in series. Also. Heating capillary tubes 6 are provided in parallel on both sides of the check valve 7, and cross fins 8 are provided at adjacent portions of the heat exchanger 1 to exchange heat with the heat exchanger 1. It is supposed to assist. Here, each component part including the heat exchanger 1, the pressure gauge 4, the capillary tube 5, 6, and the cross fin 8 is mounted in a case not shown, and the refrigerant pipe At the ends of (2) and (3), couplers for connecting to the refrigerant line 201 of the air conditioner outdoor unit 200 are respectively mounted.

In the drawings, reference numerals 202, 203, and 206 denote compressors, condensers, and four-way valves that constitute a package air conditioner outdoor unit.

The apparatus for testing performance of a packaged air conditioner outdoor unit for both a cooling and a heating unit configured as described above connects the refrigerant pipes 2 and 3 to the refrigerant line 201 of the air conditioner outdoor unit, and the refrigerant pipes 2 and 3 and the refrigerant line. At the same time as the refrigerant is circulated along the circulation path of 201, the pressure of the circulating refrigerant is checked by the pressure gauge 4 to perform a basic performance test on the air conditioner outdoor unit. At this time, the inspection is performed while the refrigerant is circulated in the direction of arrow shown in the cooling mode, and the inspection is performed while the refrigerant is circulated in the direction of arrow shown in the heating mode.

However, the above-described performance tester for a conventional air conditioner packaged air conditioner combined with the air conditioner outdoor unit is assembled according to the size of the air conditioner outdoor unit assembled by being configured to perform a performance test for only one product of a predetermined capacity. It is necessary to change the production line according to the capacity of the product or to change the production line according to the product capacity, and to designate the product for each line according to the size of the product. Was causing. Therefore, a decrease in productivity as well as a decrease in quality could not be avoided.

The present invention has been made in view of the above problems of the conventional air conditioner outdoor unit for both air-conditioning and heating, and the size and capacity of the air conditioner outdoor unit assembled by automatically or manually varying the capacity of the heat exchanger according to the capacity of the inspected object. It is an object of the present invention to provide a performance tester for a packaged air conditioner outdoor unit for both air conditioning and heating that can be used for the performance inspection of all air conditioner outdoor units for both air conditioner and heating.

Another object of the present invention is to provide a performance tester for an outdoor unit for a cooling / heating combined air conditioner for controlling a flow rate by bypassing a refrigerant when abnormal overheating occurs during heating mode operation.

1 is a view showing a structure and a connection state of the outdoor unit for the performance tester of the conventional outdoor air conditioner package for both heating and heating.

Figure 2 is a view showing the structure and the outdoor unit connection state of the performance tester of the outdoor air conditioner package combined cooling and heating according to an embodiment of the present invention.

Figure 3 is a view showing the structure and the outdoor unit connection state of the performance tester of the outdoor air conditioner package combined cooling and heating according to another embodiment of the present invention.

Figure 4 is a view showing the structure and the outdoor unit connection state of the performance tester of the outdoor air conditioner package combined cooling and heating according to another embodiment of the present invention.

5 is a view showing the structure and the outdoor unit connection state of the performance test apparatus of the air conditioner outdoor unit combined cooling and heating according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10; Heat exchangers 11, 12, 13, 14, 15; Heat exchanger

20, 30; Refrigerant pipe 40; Pressure sensor

50, 51, 52, 53, 54 ,; Shut-off valve 60; Cooling capillary tube

70; Capillary tube 71 for heating; Cooling refrigerant line

72; Check valve 80; Auxiliary refrigerant line

81; Secondary capillary tube 82; Solenoid valve

90; Bypass line 91; Bypass Capillary Tube

92; Solenoid valve 200; Air conditioner outdoor unit

An object of the present invention as described above, the refrigerant pipe is connected to the refrigerant line of the outdoor unit of the air conditioner to be inspected, and forms a closed circulation path together with the refrigerant line; A heat exchanger installed in the middle of the refrigerant pipe, the heat exchanger being divided into at least two heat exchangers and connected to and installed in parallel with the refrigerant pipe; A shutoff valve for selectively blocking flow paths to the heat exchange parts of the heat exchanger; A capillary tube connected and installed in series along one side of the refrigerant pipe; A check valve connected and installed in series on one side of the refrigerant pipe to allow the refrigerant to pass only during the cooling mode operation; A heating capillary tube connected to and installed in parallel with the check valve in the middle of one side of the refrigerant pipe; And a pressure sensor installed on the other side of the refrigerant pipe to measure the pressure of the refrigerant circulating, and configured to perform performance tests on various types of outdoor air conditioners. By providing an inspection apparatus.

Here, the heat exchanger may be partitioned into heat exchangers of two, three, four, or five stages, and the shutoff valves installed in the refrigerant line connection portions of each of the heat exchangers partitioned in this manner may be configured to be opened or closed manually or automatically. Can be.

In addition, the present invention is installed at least one auxiliary refrigerant line in parallel to the cooling capillary tube installation site of the one side refrigerant pipe, the auxiliary capillary tube and the solenoid valve for opening and closing the line is installed in this line inspection device And to assist the action of the cooling capillary tube in expanding its capacity.

In addition, the present invention is installed so that at least one or more bypass lines for directly bypassing the refrigerant when the overheating in the heating mode is connected directly to both refrigerant pipes, the bypass line capillary tube and the line opening and closing Solenoid valve for installation is installed.

The apparatus for testing performance of a packaged air conditioner outdoor unit for both air conditioning and heating according to the present invention connects the refrigerant pipe to an air conditioner outdoor unit, circulates the refrigerant, and checks the pressure of the circulating refrigerant with a pressure gauge to check the air conditioner for both air conditioning and heating. The performance test is performed on the outdoor unit, and the inspection is performed while the circulation direction of the refrigerant is reversed according to the cooling mode and the heating mode. At this time, the inspection can be performed while adjusting the capacity of the heat exchanger according to the size of the air conditioner outdoor unit, for example, water and capacity. That is, by automatically or manually adjusting the shutoff valves installed at the front or rear end of each heat exchanger constituting the heat exchanger, the inspection can be performed while adjusting the capacity of the heat exchanger according to the capacity of the inspected object. Therefore, it is possible to perform basic performance inspection of package air conditioner outdoor unit of several specifications with one device, so the setup of the manufacturing line is easy and easy, so it can be used very advantageously in the small quantity production system of various types, and the productivity and The quality can be improved.

In addition, the present invention can control the flow rate by opening the bypass valve when the abnormal overheating phenomenon appears, it is possible to prevent the abnormal overheating phenomenon.

Best Mode for Carrying Out the Invention Preferred embodiments of the present invention will now be described based on the accompanying drawings.

2 is a view illustrating a structure and a connection state of an outdoor unit of the performance testing apparatus 100a of the outdoor air conditioner package for both cooling and heating according to an embodiment of the present invention, wherein reference numeral 10 denotes a heat exchanger, 20 and 30. Silver refrigerant pipe, 40 pressure sensor, 50 shutoff valve, 60 capillary tube, 70 heating capillary tube, 71 cooling line, 72 check valve, 80 auxiliary cooling line, 90 It is a path line, and 200 represents an air conditioner outdoor unit to be inspected.

As shown, the basic configuration of the present invention is similar to the conventional device for testing the performance of the outdoor air conditioner package for both air conditioning and heating, but it can be seen from the drawings that the configuration of the heat exchanger is different from the drawing. Looking at it as follows.

Refrigerant pipes 20 and 30 are installed at both sides of the heat exchanger 10 so as to be connected to the air conditioner outdoor unit 200, and the pressure pipe 30 measures the pressure of the refrigerant circulating there. The sensor 40 is installed, and the capillary tube 60 and the heating capillary tube 70 are connected and installed in series with the refrigerant pipe 20.

In addition, a cooling refrigerant line 71 is provided between the capillary tube 60 and the refrigerant pipe 20 to form a refrigerant flow path during the cooling mode operation. In the heating mode operation, the refrigerant flowing through the heat mode heat exchanger 10 for guiding the flow of the refrigerant to the heating capillary tube 70 during heating mode is specifically carried out through the refrigerant line 71 for cooling. A check valve 72 is provided to prevent direct flow into the filler tube 60. Therefore, the refrigerant that has passed through the heat exchanger 10 in the heating mode operation necessarily passes through the capillary tube 70 for heating and then flows to the capillary tube 60.

In addition, an auxiliary refrigerant line 80 is provided near the capillary tube 60 of the refrigerant pipe 20, and the line 80 has an auxiliary capillary tube 81 and a solenoid valve for opening and closing a line. 82 is provided. Here, the solenoid valve 82 is a normal closed type that is 'on' operated when the external working condition, such as the expansion of the inspection capacity, is mainly inspected by the maximum capacity of the heat exchanger 10 and the capillary tube 60 or more. It is activated when the capacity is to be expanded to serve to assist the action of the capillary tube 60. One or more auxiliary refrigerant lines 80 may be installed, but the number is not limited thereto.

In addition, the present invention is provided with at least one bypass line (90) for bypassing the refrigerant at the time of abnormal overheating in the heating mode operation so as to directly connect the two refrigerant pipes (20) and (30), this bypass line The bypass 90 capillary tube 91 and the line opening / closing solenoid valve 92 are provided at 90.

Meanwhile, the heat exchanger 10 is partitioned into two stages of heat exchangers 11 and 12, and the first and second heat exchangers 11 and 12 partitioned in this manner are refrigerant pipes 20 and ( 30 is connected and installed in parallel, and the high pressure side refrigerant line connection part of the first heat exchange part 11 is provided with a shutoff valve 50 for selectively blocking the flow of the refrigerant through this line.

The shut-off valve 50 may be configured to be operated manually or automatically, which means that the on / off operation of the shut-off valve 50 may control the flow of the refrigerant as a result.

That is, when the shut-off valve 50 is 'off', the refrigerant circulates through only the second heat exchange part 12, and when opened, is turned on to open both the first and second heat exchange parts 11 and 12. It circulates through it. Therefore, by appropriately adjusting the capacity of the heat exchanger 10 while automatically or manually operating the above-described shutoff valve 50 according to the capacity of the inspected object, the air conditioner outdoor unit can be inspected for performance. This means that at least two types of air conditioner outdoor units of different capacities can be tested with a simple switch operation without having to change lines.

Thus, in performing the performance test of the air conditioner outdoor unit to be assembled, the present invention changes the performance test of two types of air conditioner outdoor units of at least two types having different capacities, for example, 5 to 7 and 7 to 9 planes. It can be done on one line with one device, or without using a dedicated device.

In the above, an example in which the heat exchanger is divided into two stages of heat exchangers has been described. However, the present invention is illustrated in FIGS. 3 to 5, and the heat exchanger may include three stages 100b, four stages 100c, or five stages 100d. It can be configured to perform the performance test for the air conditioner outdoor unit having more various sizes and capacities by one line, which will be described with reference to the accompanying drawings.

Figure 3 shows a performance tester (100b) of the air conditioner outdoor unit combined cooling and heating according to another embodiment of the present invention, as shown, in another embodiment of the present invention, the heat exchanger 10 is a three-step It is partitioned into the 1st, 2nd, and 3rd heat exchange parts 11, 12, 13, and is connected and installed in parallel with the refrigerant pipe. Shutoff block for selectively blocking the flow of the refrigerant through the line to the one refrigerant line connection portion of the first heat exchanger 11 and the third heat exchanger 13 and the other refrigerant line connection portion of the third heat exchanger (13) Valves 50, 51 and 52 are respectively provided. Other configurations are the same as in the case of the embodiment 100a. In the performance inspection apparatus of the combined air-conditioning and outdoor air conditioner package according to another embodiment of the present invention as described above, it is possible to easily perform the performance test for three or more air conditioner outdoor units having different sizes and capacities.

4 is yet another embodiment 100c of the present invention, in which the heat exchanger 10 has four stages of first, second, third and fourth heat exchangers 11, 12, 13, 14. And are connected to and installed in parallel to the refrigerant pipes, and shut-off valves 50, 51, 52 for selectively blocking the flow of refrigerant to each of the heat exchange parts 11, 12, 13, 14, respectively. 53 is provided in accordance with the configuration of the embodiment 100b shown in FIG. In this case, performance tests for four or more air conditioner outdoor units of different sizes and capacities can be performed in one line.

FIG. 5 shows another embodiment 100d of the present invention, in which the heat exchanger 10 is divided into five stages of heat exchange parts 11, 12, 13, 14 and 15 according to the same principle as described above. It is partitioned and connected in parallel to the refrigerant pipes, and is provided with shutoff valves 50, 51, 52 (for selectively blocking the flow of refrigerant to each of the heat exchange parts 11, 13, 14, 15) ( 53 and 54 are provided in accordance with the configuration of the embodiment 100c shown in FIG. In such an embodiment, it is possible to perform a performance test on five or more air conditioner outdoor units having different sizes and capacities. The operation of the performance test apparatus according to the present invention will be described in more detail with reference to FIG. 5. .

The basic action, for example, connecting the refrigerant pipes 20 and 30 connected to both sides of the heat exchanger 10 to the air conditioner outdoor unit under test, thereby circulating the refrigerant in the closed circulation configured and thereby circulating the refrigerant. The basic function of performing the performance test on the air conditioner outdoor unit while checking the pressure with the pressure gauge 40 is not different from the conventional apparatus. In the cooling mode, the refrigerant is circulated in the direction of the arrow shown in the drawing, while in the heating mode, the refrigerant is circulated in the direction of the arrow. It is possible to check the performance of products of various sizes and capacities while adjusting the proper capacity of the heat exchanger 10 according to the product capacity.

That is, in the case of a small-capacity air conditioner outdoor unit, for example, when inspecting an initial five-flat product, the capacity of the heat exchanger does not have to be very large, so that various heat exchangers 11, 12, 13, 14 ( The test is carried out using only one of 15). The heat exchanger used at this time will be the second heat exchanger 12. At this time, all the shutoff valves 50, 51, 52, 53, 54 are closed, and the refrigerant is circulated only through the second heat exchanger.

On the other hand, if the capacity for the air conditioner outdoor unit assembled in the inspection line as described above is changed, that is, if a larger average number of products are produced (assuming, for example, to produce a 7-mode or 9-mode air conditioner outdoor unit), In this case, the capacity of the heat exchanger will have to be increased accordingly, since the product capacity is larger than that of 5 standard hours. If the capacity of the heat exchanger does not increase even though the capacity of the product is increased, the performance inspection is not performed properly. Therefore, in the past, when the capacity of the product was changed, a dedicated performance tester or a line was changed.

However, according to the present invention, a simple switch operation by an operator or an automatic shutoff valve (herein, a shutoff valve in one refrigerant line connection part of the first heat exchange part) is opened to allow refrigerant circulation through two heat exchange parts. do. Therefore, the capacity of the heat exchanger is increased to equal the capacity of the product.

In this way, if the capacity of the product becomes larger than the air conditioner outdoor unit currently produced, the inspection is carried out using 5 heat exchangers in combination. On the contrary, when the capacity of the product becomes smaller, the flow of refrigerant is controlled through the heat exchanger while reducing the number of combinations of heat exchangers. It is possible to perform a performance test for the air conditioner outdoor unit having a variety of sizes and capacities.

On the other hand, when it is intended to extend the inspection capacity beyond the maximum capacity of the heat exchanger 10 and the capillary tube 60 in the operation of the present invention as described above, the solenoid valve 82 of the auxiliary refrigerant line 80 is The auxiliary refrigerant line 80 is opened while being 'on', and the refrigerant passes through the cooling capillary tube 60 of the refrigerant pipe 20 and the auxiliary capillary tube 81 of the auxiliary refrigerant line 80. To circulate. Therefore, even when the test capacity is to be expanded, it is possible to smoothly perform the performance test on the target air conditioner outdoor unit.

In addition, when abnormal overheating occurs in the heating mode operation, the solenoid valve 92 of the bypass line 90 is 'on' and the line is opened so that the refrigerant is bypassed through the line, thereby adjusting the flow rate to an appropriate amount. Can be. Therefore, abnormal overheating phenomenon can be prevented.

As described above, the performance testing apparatus for the outdoor air conditioner package for both cooling and heating according to the present invention can be inspected while adjusting the capacity of the heat exchanger according to the size of the air conditioner outdoor unit that is the inspected object, for example, water and capacity. That is, by automatically or manually adjusting the shutoff valves installed at the front or rear end of each heat exchanger constituting the heat exchanger, the inspection can be performed while adjusting the capacity of the heat exchanger according to the capacity of the inspected object. Therefore, it is possible to perform basic performance test of air conditioner outdoor unit of various specifications with one device, so the setting of the manufacturing line is easy and easy, so it can be very advantageously used in small quantity production system of various kinds, and productivity and quality due to improved workability Improvement can be aimed at.

In addition, the present invention can control the flow rate by opening the bypass valve when the abnormal overheating phenomenon appears, it is possible to prevent the abnormal overheating phenomenon.

In the above has been shown and described with respect to a preferred embodiment for carrying out the performance testing apparatus for the outdoor air conditioner package for both air conditioning and heating according to the present invention, the present invention is not limited to the above embodiment, which is claimed in the following claims Various changes can be made by those skilled in the art without departing from the gist of the present invention.

Claims (16)

A refrigerant pipe connected to the refrigerant line of the outdoor unit of the air conditioner under test, and forming a closed circulation path together with the refrigerant line; A heat exchanger installed in the middle of the refrigerant pipe, the heat exchanger being divided into at least two heat exchangers and connected to and installed in parallel with the refrigerant pipe; A shutoff valve for selectively blocking flow paths to the heat exchange parts of the heat exchanger; A capillary tube connected and installed in series along one side of the refrigerant pipe; A check valve connected and installed in series on one side of the refrigerant pipe to allow the refrigerant to pass only during the cooling mode operation; A heating capillary tube connected to and installed in parallel with the check valve in the middle of one side of the refrigerant pipe; And Performance testing apparatus for a combined outdoor air conditioner package for heating and cooling, characterized in that configured to perform a performance test for various types of air conditioner outdoor unit, including a pressure sensor installed on the other side of the refrigerant pipe to measure the pressure of the circulating refrigerant . The heat exchanger of claim 1, wherein the heat exchanger is partitioned into two stages of the first heat exchanger and the second heat exchanger, and connected in parallel to the refrigerant pipe, and a refrigerant flow through the line is selectively connected to one refrigerant line connection of the first heat exchanger. Cooling and heating combined package air conditioner outdoor unit performance tester, characterized in that the shut-off valve is installed to block. The heat exchanger of claim 1, wherein the heat exchanger is divided into three stages of the first heat exchanger, the second heat exchanger, and the third heat exchanger, and connected in parallel to the refrigerant pipe, and the refrigerant line connection part of the first heat exchanger and the third heat exchanger. And a shutoff valve for selectively blocking the flow of the refrigerant through the line at the other refrigerant line connection part of the third heat exchanger, respectively. The heat exchanger of claim 1, wherein the heat exchanger is partitioned into four stages of the first heat exchanger, the second heat exchanger, the third heat exchanger, and the fourth heat exchanger, and connected in parallel to the refrigerant pipe. Cooling and heating package air conditioner, characterized in that the one side refrigerant line connection portion of the fourth and fourth heat exchanger and the other refrigerant line connection portion of the third heat exchanger is provided with a shutoff valve for selectively blocking the flow of the refrigerant through this line, respectively. Performance tester of outdoor unit. The heat exchanger of claim 1, wherein the heat exchanger is partitioned into five stages of the first heat exchanger, the second heat exchanger, the third heat exchanger, the fourth heat exchanger, and the fifth heat exchanger, and connected in parallel to the refrigerant pipe. In one embodiment, the third heat exchange part, the fourth heat exchange part, the fifth heat exchange part, and the refrigerant line connection part of the third heat exchange part and the other refrigerant line connection part of the third heat exchange part are provided with a shutoff valve for selectively blocking the flow of refrigerant through the line. Performance testing device for a combined air-conditioning and outdoor package air conditioner, characterized in that. The apparatus of claim 1, wherein each of the shut-off valves is configured to be manually operated. 7. The apparatus of claim 1, wherein each of the shutoff valves is configured to be automatically operated according to a change in capacity of the product. 7. The method according to any one of claims 1 to 5, wherein at least one auxiliary refrigerant line is provided in parallel near the cooling capillary tube of the refrigerant pipe, and the auxiliary capillary tube and the line opening / closing line are provided in this line. A solenoid valve is provided for the performance tester of the outdoor air conditioner packaged air-conditioning combined package, characterized in that configured to assist the action of the cooling capillary tube in response to a change in the volume of the inspected object. According to claim 6, At least one auxiliary refrigerant line is installed in parallel near the cooling capillary tube of the refrigerant pipe, the line is provided with an auxiliary capillary tube and the solenoid valve for opening and closing the line to be inspected Performance testing device for a combined outdoor air conditioner, air conditioning package, characterized in that configured to assist the action of the cooling capillary tube with respect to the capacity change of the. The method of claim 7, wherein at least one auxiliary coolant line is installed in parallel near the cooling capillary tube of the refrigerant pipe, and the auxiliary capillary tube and the solenoid valve for opening and closing the line are installed in the line. An apparatus for testing performance of an outdoor unit of a combined air-conditioning and air-conditioning package, characterized in that it is configured to assist the action of the cooling capillary tube against a change in the body's capacity. 6. The valve according to any one of claims 1 to 5, wherein at least one bypass line for directly connecting both refrigerant pipes is provided, and the bypass line is provided with a bypass capillary tube and a line opening and closing solenoid valve. Installed, the performance tester of the outdoor air conditioner package for both air conditioning and heating, characterized in that to control the flow rate by bypassing the refrigerant when abnormal overheating occurs in the heating mode operation. The method of claim 6, wherein at least one bypass line for directly connecting both refrigerant pipes is provided, and the bypass line is provided with a bypass capillary tube and a line opening / closing solenoid valve, thereby failing in heating mode operation. When the overheat occurs by bypassing the refrigerant to control the flow rate, characterized in that the air-conditioner outdoor unit for cooling and heating combined package. 8. The method of claim 7, wherein at least one bypass line for directly connecting both refrigerant pipes is provided, and the bypass line is provided with a bypass capillary tube and a line opening / closing solenoid valve, thereby failing in heating mode operation. When the overheat occurs by bypassing the refrigerant to control the flow rate, characterized in that the air-conditioner outdoor unit for cooling and heating combined package. 10. The method of claim 8, wherein at least one bypass line for directly connecting both refrigerant pipes is provided, and the bypass line is provided with a bypass capillary tube and a line opening / closing solenoid valve, thereby failing in heating mode operation. When the overheat occurs by bypassing the refrigerant to control the flow rate, characterized in that the air-conditioner outdoor unit for cooling and heating combined package. 10. The method of claim 9, wherein at least one bypass line for directly connecting both refrigerant pipes is provided, and the bypass line is provided with a bypass capillary tube and a line opening / closing solenoid valve, thereby failing in heating mode operation. When the overheat occurs by bypassing the refrigerant to control the flow rate, characterized in that the air-conditioner outdoor unit for cooling and heating combined package. 11. The method of claim 10, wherein at least one bypass line for directly connecting both refrigerant pipes is provided, the bypass line is provided with a bypass capillary tube and a line opening and closing solenoid valve, which is abnormal in heating mode operation. When the overheat occurs by bypassing the refrigerant to control the flow rate, characterized in that the air-conditioner outdoor unit for cooling and heating combined package.

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