CN211575620U - Economizer subassembly and air conditioning system - Google Patents

Abstract

The utility model provides an economizer subassembly and air conditioning system, this economizer subassembly includes: a main pipeline; the plate heat exchanger is arranged on the main pipeline and is arranged along the vertical direction; and the main pipeline comprises a third liquid pipe, the second electronic expansion valve is arranged on the third liquid pipe, the extending direction of the third liquid pipe is the same as that of the plate heat exchanger, and the second electronic expansion valve is used for controlling the heating circulation of the air-conditioning system. Through the technical scheme provided by the application, the problems of low space utilization rate and high cost in the prior art can be solved.

Description

Economizer subassembly and air conditioning system

Technical Field

The utility model relates to an air conditioning system technical field particularly, relates to an economizer subassembly and air conditioning system.

Background

Generally, an air conditioning system includes a compressor, a four-way reversing valve, an electronic expansion valve, and an economizer assembly that communicates with the compressor, etc., via piping. In prior art, because the pipeline structure dispersion of economic ware subassembly leads to spare part a great variety, and most pipeline is the tiling setting, leads to the space utilization and the integrated level of device lower, and the cost is higher. Therefore, the prior art has the problems of low space utilization rate and high cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides an economizer subassembly and air conditioning system to solve the low and with high costs problem of space utilization among the prior art.

According to an aspect of the present invention, there is provided an economizer assembly, the economizer assembly comprising: a main pipeline; the plate heat exchanger is arranged on the main pipeline and is arranged along the vertical direction; and the main pipeline comprises a third liquid pipe, the second electronic expansion valve is arranged on the third liquid pipe, the extending direction of the third liquid pipe is the same as that of the plate heat exchanger, and the second electronic expansion valve is used for controlling the heating circulation of the air-conditioning system.

Further, the economizer assembly further comprises an auxiliary pipeline, the auxiliary pipeline is communicated with the main pipeline, and the extending direction of the auxiliary pipeline is the same as the extending direction of the plate heat exchanger.

Further, the economizer assembly further comprises a solenoid valve and a thermostatic expansion valve, and the solenoid valve and the thermostatic expansion valve are both arranged on the auxiliary pipeline.

Furthermore, the main pipeline also comprises a fifth liquid pipe, the extending direction of the fifth liquid pipe is perpendicular to the extending direction of the plate heat exchanger, and a first electronic expansion valve is arranged on the fifth liquid pipe and used for controlling the refrigeration cycle of the air conditioning system.

Further, the fifth liquid pipe is communicated with the third liquid pipe, and the fifth liquid pipe and the third liquid pipe are located on the same side of the plate heat exchanger.

Further, the economizer subassembly still includes the third check valve, and the main line still includes seventh liquid pipe and eighth liquid pipe, and the one end and the seventh liquid pipe intercommunication of third check valve, the other end and the eighth liquid pipe intercommunication of third check valve, the extending direction of third check valve and plate heat exchanger's extending direction are the same, and the third check valve is used for controlling air conditioning system's defrost cycle.

Further, the main pipeline still includes the eleventh liquid pipe, and the eleventh liquid pipe sets up the one side of keeping away from the third liquid pipe at plate heat exchanger, and the extending direction of eleventh liquid pipe is the same with plate heat exchanger's extending direction, and the eleventh liquid pipe is used for communicating with air side heat exchanger.

According to the utility model discloses an on the other hand provides an air conditioning system, and air conditioning system includes compressor, air side heat exchanger, cold water side heat exchanger, drier-filter and economizer subassembly, and the economizer subassembly is the above-mentioned economizer subassembly that provides.

Further, the economizer assembly has: the economizer assembly further comprises an air pipe and a first one-way valve, the first one-way valve is arranged on the air pipe, one end of the air pipe is communicated with the first through hole, and the other end of the air pipe is communicated with the compressor to supplement air and increase enthalpy; the economizer assembly also comprises a first liquid pipe, one end of the first liquid pipe is communicated with the second communication hole, and the other end of the first liquid pipe is communicated with the drying filter; the economizer assembly also comprises a second liquid pipe, one end of an auxiliary pipeline of the economizer assembly is communicated with the third communicating hole, and the other end of the auxiliary pipeline is communicated with the second liquid pipe; and one end of the second liquid pipe is communicated with the fourth communication hole.

Further, the air conditioning system further includes: one end of the middle liquid spraying pipeline is communicated with a main pipeline of the economizer assembly, a middle liquid spraying electromagnetic valve is arranged on the middle liquid spraying pipeline, and the other end of the middle liquid spraying pipeline is communicated with a middle gas supplementing port of the compressor; and one end of the tail liquid spraying pipeline is communicated with the main pipeline, a tail liquid spraying electromagnetic valve is arranged on the tail liquid spraying pipeline, and the other end of the tail liquid spraying pipeline is communicated with an air suction port of the compressor.

Use the technical scheme of the utility model, this economizer subassembly includes main line, plate heat exchanger and second electronic expansion valve, and plate heat exchanger sets up on the main line, and plate heat exchanger sets up along vertical direction. The main pipeline comprises a third liquid pipe, a second electronic expansion valve is arranged on the third liquid pipe, and the second electronic expansion valve is used for controlling heating circulation of the air conditioning system. The extending direction of the third liquid pipe is the same as that of the plate heat exchanger, the structure of the pipeline can be fully utilized, the pipeline structure of the economizer assembly is more compact, the types and the number of parts can be reduced, the space utilization rate can be improved, and the cost is reduced.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of an economizer assembly provided by an embodiment of the present invention;

figure 2 illustrates a front view of an economizer assembly provided by an embodiment of the present invention;

figure 3 illustrates a left side view of an economizer assembly provided by an embodiment of the present invention;

figure 4 illustrates a top view of an economizer assembly provided by an embodiment of the present invention;

fig. 5 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating an air conditioning system according to an embodiment of the present invention in a cooling mode;

fig. 7 is a schematic diagram illustrating an air conditioning system according to an embodiment of the present invention in a simultaneous cooling and heating mode;

fig. 8 is a schematic diagram illustrating an air conditioning system according to an embodiment of the present invention in a heating mode;

fig. 9 shows a schematic diagram of an air conditioning system in a defrosting mode according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a main pipeline; 11. a third liquid pipe; 12. a fifth liquid pipe; 13. a seventh liquid pipe; 14. an eighth liquid pipe; 15. an eleventh liquid tube; 16. a first liquid pipe; 17. a second liquid pipe; 18. a fourth liquid pipe; 19. a sixth liquid pipe; 201. a tenth liquid pipe; 202. a twelfth liquid tube; 203. a fourteenth liquid pipe; 204. a ninth liquid pipe; 205. a sixteenth liquid tube; 206. a fifteenth liquid tube; 207. a thirteenth liquid pipe;

20. a plate heat exchanger; 30. a second electronic expansion valve; 40. an auxiliary line; 41. a first auxiliary liquid pipe; 42. a second auxiliary liquid pipe; 43. a third auxiliary liquid pipe;

50. an electromagnetic valve; 60. a thermostatic expansion valve; 70. a first electronic expansion valve;

81. a third check valve; 82. a first check valve; 83. a second one-way valve; 84. a fourth check valve; 86. a fifth check valve;

90. an air tube;

110. a compressor; 120. an air-side heat exchanger; 130. a cold water side heat exchanger; 140. drying the filter;

150. an economizer assembly; 151. a first communication hole; 152. a second communication hole; 153. a third communication hole; 154. a fourth communication hole;

160. a middle liquid spray pipeline; 161. a middle liquid spraying electromagnetic valve;

170. a tail spray pipe; 171. a tail liquid spraying electromagnetic valve;

180. a four-way reversing valve; 190. a reservoir; 200. a gas-liquid separator; 210. a hot water side heat exchanger.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 4, an embodiment of the present invention provides an economizer assembly, which includes a main pipe 10, a plate heat exchanger 20 and a second electronic expansion valve 30, wherein the plate heat exchanger 20 is disposed on the main pipe 10, and the plate heat exchanger 20 is disposed along a vertical direction. In the present embodiment, the plate heat exchanger 20 is arranged in a vertical direction, specifically, the plate heat exchanger 20 is arranged vertically in a height direction thereof. Wherein, the main pipeline 10 includes a third liquid pipe 11, a second electronic expansion valve 30 is disposed on the third liquid pipe 11, and the second electronic expansion valve 30 is used for controlling a heating cycle of the air conditioning system. Specifically, the extending direction of the third liquid pipe 11 is the same as the extending direction of the plate heat exchanger 20, and the plane where the third liquid pipe 11 is located is parallel to the plate heat exchanger 20. In other embodiments, the plane of the third liquid pipe 11 may be arranged perpendicular to the plate heat exchanger 20, as long as the third liquid pipe 11 is ensured to extend along the height direction of the plate heat exchanger 20.

The economizer assembly provided by the embodiment is applied, the extending direction of the third liquid pipe 11 is the same as the extending direction of the plate heat exchanger 20, the space can be fully utilized, the structure of a pipeline is simplified, the pipeline structure of the economizer assembly is more compact, the space occupied by the economizer assembly is reduced, the types and the number of parts can be reduced, the space utilization rate can be improved, and the cost is reduced. And meanwhile, the product series design period can be shortened, the production cost is reduced, and the design quality is improved.

In this embodiment, the economizer assembly further includes an auxiliary pipeline 40, the auxiliary pipeline 40 is communicated with the main pipeline 10, and an extending direction of the auxiliary pipeline 40 is the same as an extending direction of the plate heat exchanger 20, so that space utilization rate can be further improved, and cost is reduced. In particular, the auxiliary line 40 extends in the height direction of the plate heat exchanger 20. Wherein the plane of the auxiliary line 40 is arranged parallel to the plate heat exchanger 20. In other embodiments, the plane of the auxiliary conduit 40 may be disposed perpendicular to the plate heat exchanger 20.

Wherein the economizer assembly further comprises a solenoid valve 50 and a thermostatic expansion valve 60, both the solenoid valve 50 and the thermostatic expansion valve 60 being disposed on the auxiliary line 40. In the present embodiment, since the plane of the auxiliary line 40 is parallel to the plate heat exchanger 20, the solenoid valve 50 and the thermal expansion valve 60 are both parallel to the plate heat exchanger 20. Specifically, the auxiliary line 40 includes a first auxiliary liquid pipe 41, a second auxiliary liquid pipe 42, and a third auxiliary liquid pipe 43 connected in series, a solenoid valve 50 is disposed between the second auxiliary liquid pipe 42 and the third auxiliary liquid pipe 43, and a thermostatic expansion valve 60 is disposed between the first auxiliary liquid pipe 41 and the second auxiliary liquid pipe 42.

The main pipeline 10 further includes a fifth liquid pipe 12, a first electronic expansion valve 70 is disposed on the fifth liquid pipe 12, and the first electronic expansion valve 70 is used for controlling a refrigeration cycle of the air conditioning system. In the present embodiment, the extending direction of the fifth liquid pipe 12 is perpendicular to the extending direction of the plate heat exchanger 20, i.e. the plane where the fifth liquid pipe 12 is located is perpendicular to the plate heat exchanger 20.

Specifically, the fifth liquid pipe 12 is communicated with the third liquid pipe 11, and the fifth liquid pipe 12 and the third liquid pipe 11 are located on the same side of the plate heat exchanger 20, so that the space of the economizer assembly can be fully utilized.

In this embodiment, the economizer assembly further includes a third check valve 81, the main pipeline 10 further includes a seventh liquid pipe 13 and an eighth liquid pipe 14, one end of the third check valve 81 is communicated with the seventh liquid pipe 13, the other end of the third check valve 81 is communicated with the eighth liquid pipe 14, the third check valve 81 extends in the same direction as the plate heat exchanger 20, and the third check valve 81 is used for controlling a defrosting cycle of the air conditioning system. By disposing the third check valve 81 in the vertical direction, the integration of the economizer assembly can be further improved. Specifically, the seventh liquid pipe 13 includes a first horizontal section, a first bending section, and a first vertical section that are connected in order, and the eighth liquid pipe 14 includes a second horizontal section, a second bending section, and a second vertical section that are connected in order, and the first vertical section is connected with one end of the third check valve 81, and the second vertical section is connected with the other end of the third check valve 81. The third check valve 81 is provided at a distance from the first electronic expansion valve 70. In the present embodiment, most of the non return valves are arranged on the same side of the plate heat exchanger 20.

In the present embodiment, the main pipeline 10 further includes an eleventh liquid pipe 15, the eleventh liquid pipe 15 is disposed on a side of the plate heat exchanger 20 far from the third liquid pipe 11, an extending direction of the eleventh liquid pipe 15 is the same as an extending direction of the plate heat exchanger 20, and the eleventh liquid pipe 15 is used for communicating with the air side heat exchanger. Specifically, the eleventh liquid pipe 15 extends substantially in a vertical direction, and the eleventh liquid pipe 15 includes a third vertical section, a third bent section, and a third horizontal section, which are connected in sequence, and the third vertical section is disposed in parallel with the plate heat exchanger 20.

As shown in fig. 5 to 9, another embodiment of the present invention provides an air conditioning system including a compressor 110, an air-side heat exchanger 120, a cold water-side heat exchanger 130, a dry filter 140, and an economizer assembly 150, the economizer assembly 150 being the economizer assembly provided above.

In the present embodiment, the economizer assembly 150 has a first communication hole 151, a second communication hole 152, a third communication hole 153, and a fourth communication hole 154.

The economizer assembly 150 further comprises a gas pipe 90 and a first check valve 82, the first check valve 82 is arranged on the gas pipe 90, one end of the gas pipe 90 is communicated with the first communication hole 151, the other end of the gas pipe 90 is communicated with the compressor 110 to supplement gas and increase enthalpy, the exhaust temperature of the compressor 110 is reduced, and the state of the refrigerant in the gas pipe 90 is medium-temperature and medium-pressure gas.

Wherein, the economizer assembly 150 further comprises a first liquid pipe 16, one end of the first liquid pipe 16 is communicated with the second communication hole 152, the other end of the first liquid pipe 16 is communicated with the dry filter 140, the section is that the dry filter 140 enters the plate heat exchanger 20, and the refrigerant state in the first liquid pipe 16 is medium temperature and medium pressure liquid. Specifically, the second electronic expansion valve 30 is connected in parallel with the second communication hole 152 and the solenoid valve 50.

Wherein the economizer assembly 150 further includes a second liquid pipe 17, one end of the auxiliary line 40 of the economizer assembly 150 communicates with the third communication hole 153, and the other end of the auxiliary line 40 communicates with the second liquid pipe 17. Specifically, since the solenoid valve 50 and the thermostatic expansion valve 60 are both disposed on the auxiliary line 40, the refrigerant before the thermostatic expansion valve 60 is a medium-temperature and medium-pressure liquid, and the thermostatic expansion valve 60 is a low-temperature and low-pressure gas after throttling and pressure reduction.

Wherein one end of the second liquid pipe 17 communicates with the fourth communication hole 154. Specifically, the fourth communication hole 154 connects the second liquid pipe 17, the fifth liquid pipe 12, and the first electronic expansion valve 70 to the water-side heat exchanger, and this section is for throttling the first electronic expansion valve 70, the liquid in the middle temperature and the middle pressure is in front of the first electronic expansion valve 70, and the state of the throttled refrigerant is a low-temperature and low-pressure gas-liquid two-phase state. Specifically, the fourth communication hole 154 connects the second liquid pipe 17, the third liquid pipe 11, the second electronic expansion valve 30, the fourth liquid pipe 18, the sixth liquid pipe 19, the second check valve 83, the tenth liquid pipe 201, and the eleventh liquid pipe 15 to the air-side heat exchanger 120, and the refrigerant is in a low-temperature low-pressure gas-liquid two-phase state after throttling while the liquid at the intermediate temperature and the intermediate pressure is in front of the second electronic expansion valve 30.

In the defrost circuit, the refrigerant flows through the eleventh liquid pipe 15, the twelfth liquid pipe 202, the fourth check valve 84, and the fourteenth liquid pipe 203 in this order, and the refrigerant state in the fourteenth liquid pipe 203 is a low-temperature and low-pressure liquid.

In the defrost circuit, the refrigerant flows through the second liquid pipe 17, the third liquid pipe 11, the second electronic expansion valve 30, the fourth liquid pipe 18, the seventh liquid pipe 13, the third check valve 81, the eighth liquid pipe 14, and the ninth liquid pipe 204 in this order, and the refrigerant state is changed from the medium-temperature and high-pressure gas to the low-temperature and low-pressure gas-liquid two-phase state.

In the heating circuit, the refrigerant state in the ninth liquid pipe 204, the sixteenth liquid pipe 205, the fifth check valve 86, the fifteenth liquid pipe 206, and the thirteenth liquid pipe 207 is medium temperature and high pressure gas.

In this embodiment, the air conditioning system further includes a middle spray line 160 and a tail spray line 170. Specifically, one end of the intermediate liquid spraying pipeline 160 is communicated with the main pipeline 10 of the economizer assembly 150, an intermediate liquid spraying solenoid valve 161 is disposed on the intermediate liquid spraying pipeline 160, the other end of the intermediate liquid spraying pipeline 160 is communicated with an intermediate air supplement port of the compressor 110, and a throttling assembly is disposed in the intermediate air supplement port of the compressor 110. Specifically, one end of the tail liquid spraying pipeline 170 is communicated with the main pipeline 10, a tail liquid spraying electromagnetic valve 171 is arranged on the tail liquid spraying pipeline 170, and the other end of the tail liquid spraying pipeline 170 is communicated with the suction port of the compressor 110.

The economizer comprises a main pipeline 10, an economizer assembly, an expansion valve, a refrigerant flow path, an electromagnetic valve, a compressor, a gas supplementing port, a gas supplementing pipeline and a gas supplementing pipeline.

In the present embodiment, the second electronic expansion valve 30 is a heating electronic expansion valve, and the first electronic expansion valve 70 is a cooling electronic expansion valve.

In this embodiment, the air conditioning system may operate in three modes, i.e., cooling, heating, cooling and heating, and specific system flow paths in each mode are as follows:

as shown in fig. 6, when the air conditioning system is in the cooling mode, the compressor 110 discharges air → the four-way selector valve 180 → the air-side heat exchanger 120 → the accumulator 190 → the filter drier 140 → the economizer (optional) → the cooling electronic expansion valve (in which case the opening of the heating electronic expansion valve is 0) → the cold water-side heat exchanger 130 → the compressor 110 sucks air.

As shown in fig. 8, when the air conditioning system is in the heating mode, the compressor 110 discharges air → the four-way reversing valve 180 → the hot water side heat exchanger 210 → the accumulator 190 → the filter drier 140 → the economizer (not employed) → the heating electronic expansion valve (in this case, the opening degree of the cooling electronic expansion valve is 0) → the air side heat exchanger 120 → the four-way reversing valve 180 → the gas-liquid separator 200 → the compressor 110 inhales air.

As shown in fig. 7, when the air conditioning system is in the cooling and heating mode, the compressor 110 discharges air → the four-way selector valve 180 → the hot water-side heat exchanger 210 → the accumulator 190 → the dry filter 140 → the economizer (which may not be used) → the cooling electronic expansion valve (in which case the opening degree of the heating electronic expansion valve is 0) → the cold water-side heat exchanger 130 → the compressor 110 sucks air.

As shown in fig. 9, when the air conditioning system is in the defrost mode (which is only generated in the heating operation mode), the compressor 110 discharges air → the four-way selector valve 180 → the air-side heat exchanger 120 → the accumulator 190 → the drying filter 140 → the economizer (which may not be used) → the heating electronic expansion valve (at which the opening degree of the cooling electronic expansion valve is 0) → the hot water-side heat exchanger 210 → the four-way selector valve 180 → the gas-liquid separator 200 → the compressor 110 sucks air.

Through the device that this embodiment provided, set up the extending direction of parts such as third liquid pipe 11 and auxiliary line 40 and the extending direction of plate heat exchanger 20 the same, can improve the structure and the overall arrangement of pipeline, can make simple structure easily implement, can also shorten product serialization design cycle simultaneously, reduction in production cost, improvement design quality and integrated level. Moreover, the device occupies small space, has few installation errors and is convenient for later maintenance and overhaul.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An economizer assembly, comprising:

a main line (10);

the plate type heat exchanger (20) is arranged on the main pipeline (10), and the plate type heat exchanger (20) is arranged along the vertical direction;

the main pipeline (10) comprises a third liquid pipe (11), the second electronic expansion valve (30) is arranged on the third liquid pipe (11), the extending direction of the third liquid pipe (11) is the same as the extending direction of the plate type heat exchanger (20), and the second electronic expansion valve (30) is used for controlling the heating circulation of the air conditioning system.

2. The economizer assembly according to claim 1, further comprising an auxiliary line (40), the auxiliary line (40) communicating with the main line (10), the auxiliary line (40) extending in the same direction as the plate heat exchanger (20).

3. The economizer assembly of claim 2 further comprising a solenoid valve (50) and a thermostatic expansion valve (60), the solenoid valve (50) and the thermostatic expansion valve (60) both being disposed on the auxiliary line (40).

4. The economizer assembly according to claim 1, wherein the main line (10) further comprises a fifth liquid pipe (12), the fifth liquid pipe (12) extending in a direction perpendicular to the plate heat exchanger (20), the fifth liquid pipe (12) being provided with a first electronic expansion valve (70), the first electronic expansion valve (70) being adapted to control a refrigeration cycle of an air conditioning system.

5. The economizer assembly according to claim 4, characterized in that the fifth liquid pipe (12) communicates with the third liquid pipe (11), the fifth liquid pipe (12) and the third liquid pipe (11) being located on the same side of the plate heat exchanger (20).

6. The economizer assembly according to claim 1, further comprising a third check valve (81), the main line (10) further comprising a seventh liquid pipe (13) and an eighth liquid pipe (14), one end of the third check valve (81) being in communication with the seventh liquid pipe (13), the other end of the third check valve (81) being in communication with the eighth liquid pipe (14), the third check valve (81) extending in the same direction as the plate heat exchanger (20), the third check valve (81) being adapted to control a defrost cycle of an air conditioning system.

7. The economizer assembly according to claim 1, wherein the main line (10) further comprises an eleventh liquid pipe (15), the eleventh liquid pipe (15) being arranged at a side of the plate heat exchanger (20) remote from the third liquid pipe (11), the eleventh liquid pipe (15) extending in the same direction as the plate heat exchanger (20), the eleventh liquid pipe (15) being adapted for communication with an air side heat exchanger.

8. An air conditioning system, characterized in that the air conditioning system comprises a compressor (110), an air side heat exchanger (120), a cold water side heat exchanger (130), a drying filter (140) and an economizer assembly (150), the economizer assembly (150) being the economizer assembly of any one of claims 1 to 7.

9. The air conditioning system of claim 8, wherein the economizer assembly (150) has:

the economizer assembly (150) further comprises an air pipe (90) and a first one-way valve (82), the first one-way valve (82) is arranged on the air pipe (90), one end of the air pipe (90) is communicated with the first communication hole (151), and the other end of the air pipe (90) is communicated with the compressor (110) to supply air and increase enthalpy;

a second communication hole (152), the economizer assembly (150) further comprising a first liquid pipe (16), one end of the first liquid pipe (16) being communicated with the second communication hole (152), the other end of the first liquid pipe (16) being communicated with the dry filter (140);

a third communication hole (153), the economizer assembly (150) further including a second liquid pipe (17), one end of the auxiliary line (40) of the economizer assembly (150) being communicated with the third communication hole (153), the other end of the auxiliary line (40) being communicated with the second liquid pipe (17);

a fourth communication hole (154), one end of the second liquid pipe (17) being communicated with the fourth communication hole (154).

10. The air conditioning system of claim 8, further comprising:

one end of the middle liquid spraying pipeline (160) is communicated with the main pipeline (10) of the economizer assembly (150), a middle liquid spraying electromagnetic valve (161) is arranged on the middle liquid spraying pipeline (160), and the other end of the middle liquid spraying pipeline (160) is communicated with a middle gas supplementing port of the compressor (110);

the tail liquid spraying device comprises a tail liquid spraying pipeline (170), one end of the tail liquid spraying pipeline (170) is communicated with the main pipeline (10), a tail liquid spraying electromagnetic valve (171) is arranged on the tail liquid spraying pipeline (170), and the other end of the tail liquid spraying pipeline (170) is communicated with a suction port of the compressor (110).

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