CN115342544A

CN115342544A - Economizer and air conditioner refrigerating system

Info

Publication number: CN115342544A
Application number: CN202210962917.4A
Authority: CN
Inventors: 顾发华; 汪审望; 朱方能; 茹志鹏; 袁鹏
Original assignee: Zhejiang Futeng Fluid Technology Co ltd
Current assignee: Zhejiang Futeng Fluid Technology Co ltd; Qingdao Haier Air Conditioning Electric Co Ltd
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2022-11-15

Abstract

The present disclosure provides an economizer, comprising: a housing part having an accommodating space therein; a gas inlet portion communicating with the accommodating space so as to deliver gas to the accommodating space of the housing portion through the gas inlet portion; a gas discharge portion communicating with the accommodating space so as to output gas from the inside of the accommodating space of the housing portion to the outside through the gas discharge portion; a fluid inlet portion communicating with the accommodating space so as to deliver liquid and gas to the accommodating space of the housing portion through the fluid inlet portion; and a fluid discharge portion communicating with the accommodation space so as to output the liquid from inside the accommodation space of the housing portion to the outside through the fluid discharge portion. The present disclosure also provides an air conditioning refrigeration system.

Description

Economizer and air conditioner refrigerating system

Technical Field

The disclosure relates to an economizer and an air-conditioning refrigeration system.

Background

The refrigerating cycle usually adopts a method of double-stage compression and intermediate air supplement to improve the efficiency of the circulating system, and the typical structure of the refrigerating cycle is shown in figure 1, which comprises a first compressor, a second compressor, an economizer and the like, and air is supplemented to the second compressor through the economizer. Compared with a structure of supplying air without an economizer, the COP (coefficient of performance) of the refrigeration cycle can be improved by more than 10% under the national standard working condition.

The reason why the system shown in fig. 1 can improve COP in the refrigeration cycle efficiency is that: the high-temperature and high-pressure liquid refrigerant from the condenser is decompressed by the first expansion valve to generate a low-temperature gas-liquid mixture, the gas is separated in the economizer and sent to the gas inlet of the second compressor, and the liquid enters the second expansion valve to be decompressed for the second time to generate a lower-temperature gas-liquid mixture. The low-temperature liquid refrigerant generated by the second expansion valve exchanges heat with water in the evaporator and is gasified to generate low-temperature water (commonly called chilled water).

Because the low-temperature gas generated by the first expansion valve is bypassed to the second compressor, the flow of the first compressor is reduced, so that the power consumption of the first compressor is reduced, and meanwhile, the inlet temperature of the second compressor is reduced, so that the power consumption of the second compressor is reduced, and therefore, the flash evaporation barrel economizer simultaneously reduces the power consumption of the first compressor and the power consumption of the second compressor, and the circulation efficiency of the water chilling unit is improved.

The advent of oil-free compressors has changed the structure of the compressor. Fig. 2 shows a schematic view of the structure of an assembly using an oil-free compressor. As shown in fig. 2, in the two-stage compressor, both air suspension and magnetic suspension need to face the problem of balancing the axial force generated by the two-stage compressor. Therefore, the motor needs to be centered, and the first-stage compressors are respectively arranged at the two axial ends of the motor, so that the axial force borne by the motor shaft is reduced, and the reliability of the thrust bearing is improved.

In this case, the first compressor sucks air from the evaporator and discharges the air to the intermediate pipe, and the economizer air supply pipe and the intermediate pipe are joined and connected to the inlet of the second compressor. The presence of the interstage tubes significantly increases the size and cost of the compressor. Moreover, the more critical drawback is that the lengthy piping and the three bends increase the flow losses, increasing the noise of the unit.

Disclosure of Invention

In order to solve one of the technical problems, the disclosure provides an economizer and an air-conditioning refrigeration system.

According to one aspect of the present disclosure, there is provided an economizer, comprising:

a housing part having an accommodating space inside thereof;

a gas inlet portion communicating with the accommodating space so as to deliver gas to the accommodating space of the housing portion through the gas inlet portion;

a gas discharge portion communicating with the accommodating space so as to output gas from the inside of the accommodating space of the housing portion to the outside through the gas discharge portion;

a fluid inlet portion communicating with the accommodating space so as to deliver liquid and gas to the accommodating space of the housing portion through the fluid inlet portion; and

a fluid discharge portion communicating with the accommodation space so as to output the liquid from inside the accommodation space of the housing portion to the outside through the fluid discharge portion.

According to the economizer of at least one embodiment of the present disclosure, the gas inlet portion and/or the gas outlet portion are located at a higher position than the fluid inlet portion and the fluid outlet portion.

According to the economizer of at least one embodiment of the present disclosure, the fluid inlet portion and the fluid outlet portion are disposed apart from each other along a length direction of the housing portion.

According to the economizer of at least one embodiment of the present disclosure, the gas inlet portion and the gas outlet portion are disposed apart from each other in a length direction of the housing portion.

According to the economizer of at least one embodiment of the present disclosure, the housing portion accommodation space includes a liquid space and a gas space, wherein the gas exhaust portion and the gas inlet portion communicate with the gas space, and the fluid inlet portion and the fluid exhaust portion communicate with the liquid space.

According to the economizer of at least one embodiment of the present disclosure, a junction of the gas space and the liquid space is formed as a liquid level position of the liquid stored in the accommodation space of the housing portion.

The economizer according to at least one embodiment of the present disclosure further includes a partition plate disposed in the receiving space of the housing part, and the partition plate is disposed to be inclined.

According to an economizer of at least one embodiment of the present disclosure, the baffle includes:

a base secured to an inner wall of the housing portion;

a liquid passing part through which liquid on a lower side of the partition plate can flow to an upper side of the partition plate; and

and a gas passing part through which gas on a lower side of the separator can flow to an upper side of the separator.

According to the economizer of at least one embodiment of the present disclosure, the liquid passing portion is formed as a groove formed at a side wall of the base.

According to the economizer of at least one embodiment of the present disclosure, the gas passing part includes a through hole formed on the partition plate.

According to the economizer of at least one embodiment of the present disclosure, the gas passing portion is above the liquid passing portion.

According to the economizer of at least one embodiment of the present disclosure, the gas passing portion is located at a position between the gas inlet portion and the gas outlet portion and near the gas outlet portion in a length direction of the housing portion.

In accordance with the economizer of at least one embodiment of the present disclosure, the gas discharge and gas entry are located on the same side of the baffle.

According to the economizer of at least one embodiment of the present disclosure, the fluid discharge portion and the fluid inlet portion are located on the same side of the partition.

According to the economizer of at least one embodiment of the present disclosure, a cross-sectional area of the inner bore of the gas inlet portion gradually increases in a flow direction of the gas.

According to the economizer of at least one embodiment of the present disclosure, a cross-sectional area of the inner bore of the gas discharge portion is gradually reduced in a flow direction of the gas.

According to another aspect of the present disclosure, an air conditioning refrigeration system is provided that includes the economizer described above.

An air conditioning refrigeration system according to at least one embodiment of the present disclosure further includes:

and the double-stage compressor comprises a first-stage compressor and a second-stage compressor, wherein the exhaust port of the first-stage compressor is connected with the gas inlet part of the economizer, and the gas inlet of the second-stage compressor is connected with the gas outlet part of the economizer.

a condenser to which a fluid inlet portion of the economizer is connected through a first expansion valve; and

an evaporator, a fluid discharge portion of the economizer being connected to the evaporator through a second expansion valve.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

Fig. 1 and 2 are schematic structural views of an air conditioning and refrigerating system according to an embodiment in the prior art.

Fig. 3 is a schematic structural view of an economizer according to one embodiment of the present disclosure.

Fig. 4 is a schematic structural view of a separator according to an embodiment of the present disclosure.

Fig. 5 and 6 are schematic structural views of an air conditioning refrigeration system according to an embodiment of the present disclosure.

FIG. 7 is a functional schematic of a baffle according to one embodiment of the present disclosure.

The reference numbers in the figures are in particular:

100 economizer

110 housing part

120 gas inlet part

130 gas discharge part

140 fluid inlet portion

150 fluid discharge part

160 baffle

161 base

162 liquid passing portion

163 gas passing part

200 first stage compressor

300 second stage compressor

400 motor

500 condenser

600 evaporator

700 first expansion valve

800 second expansion valve.

Detailed Description

The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.

The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise specified, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality among the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.

When an element is referred to as being "on" or "over," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.

For descriptive purposes, the present disclosure may use spatially relative terms such as "below … …," below … …, "" below … …, "" below, "" above … …, "" above, "" … …, "" upper, "and" side (e.g., as in "sidewall") to describe the relationship of one component to another (other) component as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising" and variations thereof are used in this specification, the presence of stated features, integers, steps, operations, elements, components and/or groups thereof are stated but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as degree terms, and as such, are used to interpret inherent deviations in measured values, calculated values, and/or provided values that would be recognized by one of ordinary skill in the art.

As shown in fig. 3, the present disclosure provides an economizer 100 that can be applied to an air conditioning refrigeration system to improve the COP of a refrigeration cycle of the air conditioning refrigeration system.

Specifically, the economizer 100 may include a housing portion 110, the housing portion 110 having an accommodating space therein; in an exemplary embodiment, the housing portion 110 is formed in a cylindrical shape with both ends closed, and accordingly, the inner space of the housing portion 110 is also substantially cylindrical. The economizer 100 of the prior art is generally shaped like this, and a detailed description of the structure of the housing portion 110 is omitted.

Unlike the prior art economizer 100 having only one gas exhaust portion 130, the economizer 100 of the present disclosure may further include a gas inlet portion 120, the gas inlet portion 120 communicating with the receiving space to deliver gas to the receiving space of the housing portion 110 through the gas inlet portion 120.

In a specific embodiment, when the economizer 100 is used in an air conditioning refrigeration system, the gas inlet 120 can be connected to a gas outlet of a first stage compressor 200 of the air conditioning refrigeration system, whereby the first stage compressor 200 feeds compressed gas into the economizer 100.

In the present disclosure, the economizer 100 further includes a gas exhaust portion 130, and the gas exhaust portion 130 communicates with the accommodating space so as to output gas from the inside of the accommodating space of the housing portion 110 to the outside through the gas exhaust portion 130.

In a specific embodiment, when the economizer 100 is applied to an air conditioning refrigeration system, the gas inlet 120 can be connected to a gas inlet of a second stage compressor 300 of the air conditioning refrigeration system, thereby providing a high pressure gas to the second stage compressor 300 through the economizer 100.

In the present disclosure, in the flow direction of the gas, that is, in the flow direction of the refrigerant gas (or gas refrigerant) in the gas inlet portion 120, the cross-sectional area of the inner hole of the gas inlet portion 120 is gradually increased, so that the gas inlet portion 120 is formed as a diffuser pipe, thereby further converting the kinetic energy of the exhaust gas into the pressure energy through the gas inlet portion 120, and reducing the flow loss.

More preferably, the cross-sectional area of the inner hole of the gas discharge part 130 is gradually reduced in the flow direction of the gas, i.e., in the flow direction of the refrigerant gas (or gas refrigerant) inside the gas discharge part 130, so that the gas discharge part 130 is formed as an expansion line, thereby reducing the suction speed and the suction loss.

Thus, the economizer 100 of the present disclosure is optimized for diffuser and expansion piping design such that the flow losses from the discharge port of the first stage compressor 200 (at the location of the first stage discharge flange) to the intake port of the second stage compressor 300 (at the location of the second stage intake flange) are less than the interstage piping connection of the prior art.

The economizer 100 of the present disclosure also includes a fluid intake 140 and a fluid discharge 150, among other structures. In the present disclosure, the fluid inlet portion 140 communicates with the accommodating space so as to deliver liquid (e.g., liquid refrigerant) and gas (e.g., gas refrigerant) to the accommodating space of the housing portion 110 through the fluid inlet portion 140; the fluid discharge portion 150 communicates with the accommodating space so that the liquid is discharged from the inside of the accommodating space of the housing portion 110 to the outside through the fluid discharge portion 150.

In use, the fluid inlet portion 140 may be connected to an outlet of the first expansion valve 700 such that the liquid refrigerant flows into the economizer 100 after passing through the first expansion valve 700; and the fluid discharge portion 150 can be connected to an inlet of the second expansion valve 800 so that the liquid can enter the second expansion valve 800 from the economizer 100.

The structures of the fluid inlet portion 140 and the fluid outlet portion 150, which are typical of the economizer 100, will not be described in detail.

In the present disclosure, the gas inlet 120 and/or the gas outlet 130 are located at a higher position than the fluid inlet 140 and the fluid outlet 150. That is, the lower one of the gas inlet portion 120 and the gas outlet portion 130 is located at a higher level than the upper one of the fluid inlet portion 140 and the fluid outlet portion 150, whereby the amount of direct contact of the gas refrigerant, which is introduced through the gas inlet portion 120, with the liquid refrigerant can be effectively controlled, and the liquid refrigerant can be prevented from being discharged from the gas outlet portion 130.

The fluid inlet part 140 and the fluid outlet part 150 are disposed apart from each other along the length direction of the housing part 110; in one embodiment, the positions of the fluid inlet portion 140 and the fluid outlet portion 150 may be selectively set at any axial position of the housing portion 110 according to the arrangement position of the components in the air-conditioning and refrigerating system, so as to facilitate the arrangement of the components in the air-conditioning and refrigerating system.

The gas inlet part 120 and the gas outlet part 130 are disposed apart from each other in a length direction of the housing part 110.

In a preferred embodiment, the housing portion 110 has a central axis, the axis of the gas inlet portion 120 can intersect the central axis, similarly, the axis of the gas outlet portion 130 can also intersect the central axis, and the axis of the gas inlet portion 120 and the axis of the gas outlet portion 130 lie in different planes. Alternatively, the angle between the axis of the gas inlet portion 120 and the partition plate 160 is different from the angle between the axis of the gas outlet portion 130 and the partition plate 160.

In a more preferred embodiment, the axis of the gas discharge portion 130 is disposed substantially perpendicular to the partition plate; the gas discharge portion 130 has a position higher than the gas inlet portion 120, and prevents the liquid refrigerant from being discharged from the gas discharge portion 130.

In this disclosure, the accommodating space of the housing portion 110 includes a liquid space and a gas space, wherein the liquid space is formed in a lower half portion of the accommodating space, the gas space is formed in an upper half portion of the accommodating space, and a joint of the gas space and the liquid space is formed as a liquid level position of liquid stored in the accommodating space of the housing portion 110.

Wherein the gas outlet 130 and the gas inlet 120 communicate with the gas space and the fluid inlet 140 and the fluid outlet 150 communicate with the liquid space.

As one of the important points of the present disclosure, as shown in fig. 3 and 4, the economizer 100 of the present disclosure further includes a partition 160 inside, the partition 160 is disposed in the accommodating space of the housing portion 110, and the partition 160 is disposed in an inclined manner.

More preferably, the angle between the partition 160 and the horizontal plane is an acute angle, and more preferably, the angle may have a value of about 30 °.

In a specific embodiment, the partition 160 includes: a base 161, a liquid passage portion 162, and a gas passage portion 163.

The base 161 is fixed to an inner wall of the housing part 110; that is, the position of the partition 160 relative to the housing 110 is fixed.

The liquid passing portion 162 is formed as a groove formed at a sidewall of the base 161, whereby the liquid (and/or gas) at the lower side of the partition 160 can flow to the upper side of the partition 160 through the liquid passing portion 162, and the liquid (and/or gas) at the upper side of the partition 160 can flow to the lower side of the partition 160 through the liquid passing portion 162, that is, the liquid passing portion 162 can communicate the upper side and the lower side of the partition 160.

The gas passing part 163 is formed as a through hole formed on the separator 160, whereby the gas on the lower side of the separator 160 can flow to the upper side of the separator 160 through the gas passing part. In a preferred embodiment, the gas passing portion 163 is located at a position between the gas inlet portion 120 and the gas outlet portion 130 along the length direction of the housing portion 110 (i.e., the axial direction of the housing portion 110), and is preferably disposed adjacent to the gas outlet portion 130.

In the present disclosure, the gas passing portion 163 is above the liquid passing portion 162, and thus there is no liquid refrigerant in the vicinity of the gas passing portion 163, that is, a liquid level sensor may be provided in the economizer 100, and accordingly, the liquid level of the liquid refrigerant does not exist at a position in the vicinity of the gas passing portion 163.

The gas exhaust portion 130 and the gas inlet portion 120 are located on the same side of the partition 160, and in one embodiment, the gas exhaust portion 130 and the gas inlet portion 120 are located on the upper left of the partition 160.

The fluid exhaust 150 and the fluid inlet 140 are located on the same side of the partition 160, and in one embodiment, the fluid inlet 140 and the fluid exhaust 150 are both located below the partition 160.

The center position of the partition 160 coincides with the center position of the accommodating space of the housing part 110; more preferably, the economizer 100 can also include a temperature sensor for detecting the superheat of the secondary suction gas.

Thus, as shown in fig. 7, by the arrangement of the partition 160, the economizer 100 newly designed by the present disclosure can be made to operate more efficiently, specifically:

when the level of the liquid refrigerant is lower than the liquid passing portion 162 of the bottom of the partition 160: the gas refrigerant entering the economizer 100 from the discharge port of the first stage compressor 200 (PH diagram state 2) mixes with the low temperature saturated gas of the first expansion valve 700 (PH diagram state b), lowering the temperature of the gas refrigerant at the intake port of the second stage compressor 300 (PH diagram state 3).

When the liquid level is high enough and submerges the liquid passing portion 162 at the bottom of the partition 160: the economizer 100 is in saturation and the second stage compressor 300 draws in saturated gas (PH map state b). Under the assumption that the isentropic efficiency of the compressor is not changed, the power consumption of the compressor is reduced under the condition of the same pressure ratio due to the reduction of the inlet temperature of the second-stage compressor 300, so that the COP of the air-conditioning refrigeration system can be improved by 1 percent or more.

When the liquid passes through the portion 162 at the bottom of the partition plate is immersed by a small amount of liquid: the high-temperature gas entering the economizer from the exhaust port of the first-stage compressor 200 exchanges heat with the low-temperature liquid in the economizer, little liquid is vaporized, the economizer is still in an overheated state and is positioned between states 3 and b on a PH diagram, and therefore through the arrangement of the partition plate 160, the performance of the compressor set is improved, and the gas sucked by the second-stage compressor 300 is prevented from carrying liquid.

Fig. 5 and 6 are schematic structural views of an air conditioning refrigeration system according to one embodiment of the present disclosure.

According to another aspect of the present disclosure, as shown in fig. 5 and 6, the present disclosure provides an air conditioning refrigeration system that may include the economizer 100 described above.

More specifically, as shown in fig. 5 and 6, the air conditioning refrigeration system of the present disclosure may further include: and a two-stage compressor including a first-stage compressor 200 and a second-stage compressor 300, the first-stage compressor 200 and the second-stage compressor 300 being driven by the same motor 400, wherein a gas outlet of the first-stage compressor 200 is connected to the gas inlet part 120 of the economizer 100, and a gas inlet of the second-stage compressor 300 is connected to the gas outlet part 130 of the economizer 100.

That is, in the present disclosure, the exhaust port of the first-stage compressor 200 is not directly connected to the intake port of the second-stage compressor 300 through an interstage connection pipe, but the exhaust port of the first-stage compressor 200 is indirectly connected to the intake port of the second-stage compressor 300 through the economizer 100, so that the problems of lengthy interstage connection pipes and flow loss and noise associated with the lengthy interstage connection pipes existing when the air-conditioning refrigeration system is centered on the motor and the first-stage compressor 200 and the second-stage compressor 300 are distributed on both sides are solved.

In the present disclosure, as shown in fig. 5 and 6, the air conditioning and refrigerating system of the present disclosure may further include: condenser 500 and evaporator 600. The fluid inlet 140 of the economizer 100 is connected to the condenser 500 through a first expansion valve 700; and the fluid discharge portion 150 of the economizer 100 is connected to the evaporator 600 through a second expansion valve 800.

The condenser 500 and the evaporator 600 are conventional in the art and will not be described in detail herein.

In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

It will be understood by those skilled in the art that the foregoing embodiments are provided merely for clarity of explanation and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims

1. An economizer, comprising:

a housing part having an accommodating space inside thereof;

2. The economizer of claim 1 wherein the gas inlet and/or gas outlet is located at a higher elevation than the fluid inlet and fluid outlet.

3. The economizer of claim 1 wherein the fluid inlet and fluid outlet are located away from each other along the length of the housing section.

4. The economizer of claim 1 wherein the gas inlet and gas outlet are located away from each other along the length of the housing section.

5. The economizer of claim 1 wherein the housing section receiving space comprises a liquid space and a gas space, wherein the gas exhaust and gas inlet sections communicate with the gas space and the fluid inlet and fluid exhaust sections communicate with the liquid space.

6. The economizer of claim 5 wherein the junction of the gas space and the liquid space forms a level of liquid stored in the receiving space of the housing portion.

7. The economizer of any one of claims 1-6 further comprising a partition disposed in the housing section receiving space and the partition is disposed at an incline;

optionally, the separator comprises:

a base secured to an inner wall of the housing portion;

a gas passing portion through which gas on a lower side of the separator can flow to an upper side of the separator;

optionally, the liquid passing portion is formed as a groove formed at a side wall of the base;

optionally, the gas passing portion includes a through hole formed on the separator;

optionally, the gas passage portion is above the liquid passage portion.

8. The economizer of any one of claims 1 to 7 wherein the gas passage section is located along the length of the housing section at a position between the gas entry section and the gas exit section and adjacent the gas exit section;

optionally, the gas exhaust and gas entry are on the same side of the separator;

optionally, the fluid outlet and fluid inlet are located on the same side of the partition;

optionally, the cross-sectional area of the inner bore of the gas inlet portion gradually increases along the flow direction of the gas;

optionally, the cross-sectional area of the inner bore of the gas discharge portion gradually decreases in the flow direction of the gas.

9. An air conditioning refrigeration system comprising the economizer of any one of claims 1-8.

10. An air conditioning refrigeration system as set forth in claim 9 and further including:

the two-stage compressor comprises a first-stage compressor and a second-stage compressor, wherein the exhaust port of the first-stage compressor is connected to the gas inlet part of the economizer, and the gas inlet of the second-stage compressor is connected to the gas outlet part of the economizer;

optionally, the method further comprises:

an evaporator to which a fluid discharge portion of the economizer is connected through a second expansion valve.