CN204612278U - Air conditioning system - Google Patents

Abstract

The utility model discloses an air-conditioning system. The air-conditioning system includes a fin heat exchanger and a shell-and-tube heat exchanger connected to the fin heat exchanger through a pipeline. The air-conditioning system also includes a defrosting pipeline. The water end is connected to the water outlet pipeline of the shell-and-tube heat exchanger, and the defrosting pipeline includes a heat conduction device, and the heat conduction device is arranged at the fins of the fin heat exchanger. The utility model effectively solves the problem of the environment temperature fluctuation in the heating process caused by the defrosting process of the air conditioning system in the prior art.

Description

Air Conditioning System

technical field

The utility model relates to the technical field of air conditioning, in particular to an air conditioning system.

Background technique

The air-conditioning refrigeration (heating) system in the prior art is mainly composed of a compressor, a shell-and-tube heat exchanger, a capillary tube, and a fin heat exchanger. When it is running for heating, the fin heat exchanger usually frosts. The traditional defrosting method is to stop heating and switch directly to cooling mode for defrosting. This defrosting method has a great impact on the heating efficiency of the air-conditioning system, especially when the heating will obviously feel the fluctuation of the ambient temperature, which will affect the comfort of people.

Utility model content

The embodiment of the utility model provides an air-conditioning system to solve the problem in the prior art that the air-conditioning system causes fluctuations in the ambient temperature during the heating process during the defrosting process.

In order to solve the above technical problems, the utility model provides an air-conditioning system, the air-conditioning system includes a fin heat exchanger and a shell-and-tube heat exchanger connected to the fin heat exchanger through a pipeline, and the air-conditioning system also includes a defrosting pipeline , the water inlet end of the defrosting pipeline is connected to the water outlet pipeline of the shell-and-tube heat exchanger, the defrosting pipeline includes a heat conduction device, and the heat conduction device is arranged at the fin of the fin heat exchanger.

Further, the defrosting pipeline also includes a first water collecting pipe and a second water collecting pipe, the heat conducting device is located between the first water collecting pipe and the second water collecting pipe, and the first water collecting pipe is located between the water inlet end of the defrosting pipeline and the heat conducting device between.

Further, the first water collecting pipe and the second water collecting pipe are arranged on one side of the fin heat exchanger, and the air collecting pipe of the fin heat exchanger is arranged on the opposite side of the first water collecting pipe.

Further, the defrosting pipeline includes a filter valve, which is located between the water inlet end of the defrosting pipeline and the first water collecting pipe.

Further, the water outlet end of the defrosting pipeline is connected to the water inlet pipeline of the shell-and-tube heat exchanger.

Further, the water outlet end of the defrosting pipeline is connected to the drain pipeline of the air conditioning system.

Further, the heat conduction device is a copper tube.

Further, the copper tube includes a plurality of tube sections interspersed between the fins of the fin heat exchanger, and a plurality of fins are spaced between each tube section.

Further, a water pump is provided on the water outlet pipeline of the shell-and-tube heat exchanger, and the water pump is located between the water outlet of the shell-and-tube heat exchanger and the water inlet end of the defrosting pipeline.

Applying the technical scheme of the utility model, when the air conditioner is heating, hot water is contained in the water outlet pipeline of the shell-and-tube heat exchanger in the air conditioning system, and the defrosting pipeline guides the hot water in the water outlet pipeline to the On the heat conduction device at the fin of the fin heat exchanger, the heat conduction device raises the evaporation temperature at the position of the fin through the temperature of the hot water, so as to complete the work of defrosting the fin. By adding a defrosting pipeline to the air conditioning system, a small amount of hot water can be drained to complete the defrosting work, which prevents the air conditioning system from running the cooling mode during defrosting, thereby avoiding the impact on the indoor temperature and eliminating the need for the air conditioning system. The fluctuation of the ambient temperature during the heating process also avoids the useless work of the input power of the system for cooling operation, and improves the operating efficiency of the system.

Description of drawings

Fig. 1 is a structural schematic diagram of an air conditioning system according to an embodiment of the present invention.

Explanation of reference signs:

11. Fin heat exchanger; 12. Shell and tube heat exchanger; 13. Outlet pipeline; 14. Air collecting pipe; 15. Water inlet pipeline; 16. Water pump; 20. Defrost pipeline; 21. First water collecting pipe ; 22, the second water collection pipe; 23, the filter valve; 24, the heat conduction device.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Referring to Fig. 1, according to an embodiment of the present invention, the air conditioning system includes a finned heat exchanger 11, a shell-and-tube heat exchanger 12, a compressor shown in the figure, a gas-liquid separator, and an electronic expansion valve, wherein, The shell-and-tube heat exchanger 12 is connected to the finned heat exchanger 11 through pipelines. The air-conditioning system of this embodiment also includes a defrosting pipeline 20, and the water inlet end of the defrosting pipeline 20 is connected to the shell-and-tube heat exchanger 12. On the water outlet pipeline 13, the defrosting pipeline 20 includes a heat conduction device 24 (in the schematic diagram of FIG. The fins of the finned heat exchanger 11.

When the air conditioner is heating, there is hot water in the water outlet pipe 13 of the shell-and-tube heat exchanger 12 in the air-conditioning system, and the defrosting pipe 20 guides the hot water in the water outlet pipe 13 to the fin heat exchanger through the water pipe. On the heat conduction device 24 at the fin of the device 11, the heat conduction device 24 increases the evaporation temperature of the fin position through the temperature of the hot water, so as to complete the defrosting work on the fin, as shown in Figure 1, the defrosting pipeline 20 is the part marked with bold lines in the figure. By adding a defrosting pipeline to the air conditioning system, a small amount of hot water can be drained to complete the defrosting work, which prevents the air conditioning system from running the cooling mode during defrosting, thereby avoiding the impact on the indoor temperature and eliminating the need for the air conditioning system. The fluctuation of the ambient temperature during the heating process also avoids the useless work of the input power of the system for cooling operation, and improves the operating efficiency of the system.

Moreover, the defrosting pipeline 20 provided in the air conditioning system not only has the above-mentioned advantages in the heating process, but also the defrosting pipeline 20 can use cold water to cool the fin heat exchanger 11 during refrigeration. The heat conduction device 24 is equivalent to water cooling plus air cooling at the fin heat exchanger 11, so as to improve cooling energy efficiency. Meanwhile, in the air-conditioning system capable of heating hot water, the air-conditioning system of this embodiment can also achieve the above-mentioned technical effects during the process of heating hot water, which will not be repeated here.

In order to further enhance the defrosting effect, the defrosting pipeline 20 also includes a first water collecting pipe 21 and a second water collecting pipe 22, the heat conduction device 24 is located between the first water collecting pipe 21 and the second water collecting pipe 22, and the first water collecting pipe 21 It is located between the water inlet end of the defrosting pipeline 20 and the heat conduction device 24 . The function of the water collection pipe is to separate gas and liquid and store liquid. The first water collection pipe 21 and the second water collection pipe 22 effectively prevent the hot water flowing into the heat conduction device 24 from having bubbles, and ensure that the temperature in the heat conduction device 24 is consistent with the temperature of the hot water. Close to the same, so that the defrosting effect is improved.

Meanwhile, the first water collecting pipe 21 and the second water collecting pipe 22 are arranged on one side of the fin heat exchanger 11 , and the air collecting pipe 14 of the fin heat exchanger 11 is arranged on the opposite side of the first water collecting pipe 21 . It should be noted that the installation positions of the first water collection pipe 21 and the second water collection pipe 22 are their spatial positions, the body of the fin heat exchanger 11 has opposite sides, and the first water collection pipe 21 and the second water collection pipe 22 are arranged On one side of the body of the fin heat exchanger 11, the air collector 14 of the fin heat exchanger 11 is arranged on the other opposite side. The advantage of this arrangement is not only to avoid the accumulation of the header, but also to make the The direction of the water flow in the pipe of the road is opposite to that of the refrigerant of the air conditioning system, and the countercurrent heat exchange effect is better.

The defrosting pipeline 20 includes a filter valve 23 located between the water inlet end of the defrosting pipeline 20 and the first water collecting pipe 21 . It should be noted that the first water collecting pipe 21, the second water collecting pipe 22, the filter valve 23 and the heat conduction device 24 included in the defrosting pipeline 20 are all arranged on the water outlet pipe of the defrosting pipeline 20, and the defrosting pipe The water inlet and the water outlet of road 20 are also the two ends of its water pipe.

A water pump 16 is provided on the water outlet pipeline 13 of the shell-and-tube heat exchanger 12 , and the water pump 16 is located between the water outlet of the shell-and-tube heat exchanger 12 and the water inlet end of the defrosting pipeline 20 . By adding a filter valve 23 to control the cleanliness of the water flow in the defrosting pipeline 20, the water pump 16 can be set to choose whether to open the defrosting pipeline 20 for circulation according to specific needs, such as: when the heating starts, no defrosting operation is required , then turn off the water pump to close the defrosting pipeline 20; after heating for a period of time, turn on the water pump to make hot water circulate in the defrosting pipeline 20, and start defrosting the fin heat exchanger 11 like this.

In this embodiment, the water outlet end of the defrosting pipeline 20 is connected to the water inlet pipeline 15 of the shell-and-tube heat exchanger 12, so that the water flows back to the water channel of the original system after the defrosting work is carried out by diversion. The advantage of such setting is that the water inlet end and the water outlet end of the defrosting pipeline 20 can be switched to each other, and operations can be performed according to other needs. In other unshown embodiments, the water outlet of the defrosting pipeline 20 is connected to the drain pipeline of the air conditioning system, and the water flow in the defrosting pipeline 20 is directly discharged from the system.

Further preferably in this embodiment, the heat conduction device 24 is a copper tube. The copper tube includes multiple tube segments interspersed between the fins of the fin heat exchanger 11 , and multiple fins are spaced between each tube segment. The copper tubes for hot water are interspersed between the 3 to 5 rows of refrigerant heat exchange tubes in the original system on the fins. The spacing distance can be determined according to the heat exchange requirements of the system. The copper tubes are threaded in the way of fins. . The copper pipe routing includes two structures: 1. Multiple pipe sections are arranged parallel to each other and at intervals, and the two ends of the multiple pipe sections are connected to a water inlet copper pipe and a water outlet copper pipe. 2. The copper tube is a copper tube that is bent and interspersed between the fins. Multiple tube segments are different parts of a copper tube. Generally, the tube segments are also parallel to each other, and multiple tube segments pass through the gap between every two tube segments. The arc-shaped copper tubes are connected to form a copper tube structure.

In the prior art, defrosting is carried out by hot gas bypass defrosting method, specifically, the defrosting is carried out by using the exhaust gas to directly pass through the two pipelines at the bottom of the fins, so as to avoid frosting at the bottom of the fins. However, in this embodiment, copper tubes with more pipe sections are inserted near the fins and close to the fins to defrost the fins comprehensively and thoroughly, avoiding the above-mentioned prior art. There is also the problem of frosting.

Of course, the above are preferred embodiments of the present invention. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the basic principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims (9)

1. an air-conditioning system, comprise finned heat exchanger (11) and the case tube heat exchanger (12) be connected with described finned heat exchanger (11) by pipeline, it is characterized in that, described air-conditioning system also comprises defrost pipeline (20), the water inlet end of described defrost pipeline (20) is communicated with on the outlet pipeline (13) of described case tube heat exchanger (12), described defrost pipeline (20) comprises heat-transfer device (24), and described heat-transfer device (24) is arranged on the fin place of described finned heat exchanger (11).

2. air-conditioning system according to claim 1, it is characterized in that, described defrost pipeline (20) also comprises the first collector pipe (21) and the second collector pipe (22), described heat-transfer device (24) is positioned between described first collector pipe (21) and described second collector pipe (22), between the water inlet end that described first collector pipe (21) is positioned at described defrost pipeline (20) and described heat-transfer device (24).

3. air-conditioning system according to claim 2, it is characterized in that, the setting position of described first collector pipe (21) and described second collector pipe (22) is positioned at the side of described finned heat exchanger (11), the discharge (14) of described finned heat exchanger (11) be arranged on the contrary side of described first collector pipe (21).

4. air-conditioning system according to claim 2, it is characterized in that, described defrost pipeline (20) comprises strainer valve (23), between the water inlet end that described strainer valve (23) is positioned at described defrost pipeline (20) and described first collector pipe (21).

5. air-conditioning system according to claim 1, is characterized in that, the water side of described defrost pipeline (20) is connected on the inlet pipeline (15) of described case tube heat exchanger (12).

6. air-conditioning system according to claim 1, is characterized in that, the water side of described defrost pipeline (20) is connected on the discharge pipe line of described air-conditioning system.

7. air-conditioning system according to claim 1, is characterized in that, described heat-transfer device (24) is copper pipe.

8. air-conditioning system according to claim 7, is characterized in that, described copper pipe comprises multiple pipeline section interted between the fin of described finned heat exchanger (11), the multiple described fin in interval between each described pipeline section.

9. air-conditioning system according to claim 1, it is characterized in that, the outlet pipeline (13) of described case tube heat exchanger (12) is provided with water pump (16), and the position of described water pump (16) is positioned between the delivery port of described case tube heat exchanger (12) and the water inlet end of described defrost pipeline (20).