Economizer and heat pump system

Abstract

The utility model provides an economizer and a heat pump system, the economizer comprises a shell and a baffle assembly, a containing cavity is formed in the shell, the shell is provided with an inlet, an outlet and an exhaust port, and the inlet, the outlet and the exhaust port are all communicated with the containing cavity; the baffle assembly is arranged in the containing cavity, a buffering cavity is defined between the baffle assembly and the shell, the inlet is communicated with the buffering cavity, a plurality of through holes are formed in the baffle assembly, and the buffering cavity is communicated with the containing cavity through the through holes. According to the economizer, the baffle assembly is arranged at the inlet, the buffering cavity is formed between the baffle assembly and the shell, large-flow refrigerants entering the shell are buffered through the buffering cavity, the flow speed of the refrigerants is reduced, and the refrigerants flow out through the through holes in the baffle assembly. The fluctuation of the liquid level in the economizer is gentle, so that the fluctuation of the liquid level at the outlet of the economizer is gentle, and the phenomenon of liquid seal failure at the outlet of the economizer is reduced.

Description

Technical Field

[0001] This utility model relates to the field of heating, ventilation and air conditioning equipment technology, and in particular to an economizer and heat pump system. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] In heat pump systems in the refrigeration and air conditioning industry, two types of economizers are commonly used: heat exchange type and gas-liquid separation type. The former has a compact structure, occupies little space, and has high heat exchange efficiency, but is mostly suitable for heat pump systems with small cooling capacity; while in large-capacity heat pump systems or heat pumps, gas-liquid separation type economizers are more widely used.

[0004] In a gas-liquid separation economizer, two-phase refrigerant continuously flows into the economizer from the inlet. After a gas-liquid separation process, the liquid refrigerant flows from the liquid outlet into the evaporator, while the gaseous refrigerant flows from the make-up gas inlet into the make-up gas pipe. However, due to the large refrigerant flow rate, the liquid level in the economizer fluctuates violently, making it impossible to guarantee that the liquid outlet is always in a liquid-sealed state. Furthermore, entrainment may occur at the liquid outlet, both of which can cause gaseous refrigerant to enter the evaporator, thus affecting system performance. Simultaneously, an excessively high refrigerant flow rate can also cause the gaseous refrigerant to carry some liquid refrigerant into the make-up gas pipe, resulting in liquid carryover and affecting compressor operation. Utility Model Content

[0005] The purpose of this invention is to at least solve the technical problem that gaseous refrigerant in existing economizers can easily enter the downstream evaporator from the liquid outlet, affecting system performance. This objective is achieved through the following technical solution:

[0006] The first aspect of this utility model provides an economizer, comprising:

[0007] The housing has an internal cavity, and the housing has an inlet, an outlet, and an exhaust port, all of which are in communication with the cavity.

[0008] A baffle assembly is disposed within the receiving cavity, and a buffer cavity is defined between the baffle assembly and a portion of the housing. The inlet communicates with the buffer cavity, and the baffle assembly is provided with a plurality of through holes, through which the buffer cavity communicates with the receiving cavity.

[0009] The economizer proposed in this invention uses a baffle assembly at the inlet, forming a buffer cavity between the baffle assembly and the housing. The large flow of refrigerant entering the housing is buffered by this cavity, reducing the refrigerant velocity, and then flows out through multiple through-holes on the baffle assembly. This results in smoother liquid level fluctuations within the economizer, which in turn reduces liquid level fluctuations at the outlet, thereby minimizing the possibility of liquid seal failure at the outlet.

[0010] In addition, the economizer according to this utility model may also have the following additional technical features:

[0011] In some embodiments of this utility model, the baffle assembly includes a first baffle along the flow direction of the inlet, at least a portion of the first baffle is disposed opposite to the inlet, and is provided with the through hole.

[0012] In some embodiments of this utility model, the baffle assembly further includes two side plates arranged opposite to each other, the first baffle and the inlet are both located between the two side plates, and the opposite sides of the first baffle are respectively connected to the housing through one of the side plates.

[0013] In some embodiments of this utility model, along the first direction, the inlet and the outlet are located on the same side of the receiving cavity, and along the second direction, the inlet and the outlet are spaced apart.

[0014] Wherein, the first direction is perpendicular to the second direction.

[0015] In some embodiments of this utility model, the economizer further includes a second baffle, which is located inside the receiving cavity and blocks part of the outlet. The second baffle is arranged parallel to or at an angle to the flow direction of the outlet.

[0016] In some embodiments of this utility model, the economizer further includes an air supply bend, which is disposed within the receiving cavity and communicates with the exhaust port.

[0017] In some embodiments of this utility model, the economizer further includes a partition assembly. Along the first direction, the partition assembly divides the receiving cavity into a liquid phase cavity and a gas phase cavity. The gas phase cavity is located above the liquid phase cavity. The baffle assembly is located inside the liquid phase cavity. The inlet and the outlet are both connected to the liquid phase cavity. The gas supply bend is located inside the gas phase cavity. The exhaust port is connected to the gas phase cavity. The partition assembly has a filter structure, and the liquid phase cavity is connected to the gas phase cavity through the filter structure.

[0018] In some embodiments of this utility model, along the second direction, the filter structure is located between one end of the air supply bend and one end of the receiving cavity, and the end of the air supply bend facing away from the exhaust port is arranged towards the other end of the receiving cavity.

[0019] In some embodiments of this utility model, along the first direction, the exhaust port is disposed opposite to the inlet, and the filter structure is disposed opposite to the outlet.

[0020] The second aspect of this utility model provides a heat pump system including the economizer proposed in the first aspect of this utility model.

[0021] The heat pump system proposed in the second aspect of this utility model has good operational reliability. By installing a baffle assembly at the inlet of the economizer, a buffer cavity is formed between the baffle assembly and the shell. The large flow of refrigerant entering the shell is buffered by the buffer cavity, reducing the refrigerant flow rate, and then flows out through multiple through holes on the baffle assembly. This makes the liquid level fluctuation in the economizer more gradual, thereby increasing the liquid seal time at the outlet of the economizer. This makes it difficult for gaseous refrigerant to enter the downstream evaporator from the outlet, reducing liquid carryover during evaporation and improving the operational reliability of the heat pump system. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0023] Figure 1 A schematic diagram of the structure of an outdoor unit according to an embodiment of the present invention is shown.

[0024] Figure 2 A schematic diagram of the outdoor unit (concealing the front panel and top cover) according to an embodiment of the present invention is shown.

[0025] The attached figures are labeled as follows:

[0026] 100. Economical instrument;

[0027] 10. Shell; 11. Receiving cavity; 111. Gas phase cavity; 112. Liquid phase cavity; 12. Inlet; 13. Outlet; 14. Exhaust port; 15. Gas supply bend;

[0028] 20. Baffle assembly; 21. Buffer cavity; 22. Through hole; 23. First baffle; 24. Side plate; 25. Second baffle;

[0029] 30. Partition assembly; 31. Filter structure. Detailed Implementation

[0030] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0031] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0032] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0033] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0034] like Figures 1 to 2 As shown, Figure 1-2In the first aspect of this utility model, direction A represents the first direction, which is the height direction of the receiving cavity 11, and direction B represents the second direction, which is the axial direction of the receiving cavity 11. The first aspect of this utility model proposes an economizer 100, including a housing 10 and a baffle assembly 20. The receiving cavity 11 is formed inside the housing 10. The housing 10 has an inlet 12, an outlet 13 and an exhaust port 14. The inlet 12, the outlet 13 and the exhaust port 14 are all connected to the receiving cavity 11. The baffle assembly 20 is disposed in the receiving cavity 11. A buffer cavity 21 is defined between the baffle assembly 20 and a portion of the housing 10. The inlet 12 is connected to the buffer cavity 21. The baffle assembly 20 is provided with a plurality of through holes 22. The buffer cavity 21 is connected to the receiving cavity 11 through the through holes 22.

[0035] As can be seen, the economizer 100 proposed in this utility model, by setting a baffle assembly 20 at the inlet 12, forms a buffer cavity 21 between the baffle assembly 20 and the housing 10. The large flow of refrigerant entering the housing 10 is buffered by the buffer cavity 21, reducing the refrigerant flow rate, and flows out through multiple through holes 22 on the baffle assembly 20. This makes the liquid level fluctuation inside the economizer 100 more gradual, thereby increasing the liquid seal time at the outlet 13 of the economizer 100.

[0036] For example, the economizer 100 is installed between the condenser and evaporator in the heat pump system to separate the gas and liquid phases of the refrigerant through flash evaporation. The separated gaseous refrigerant enters the compressor through a pipeline for further compression and circulation, replenishing the compressor and improving its efficiency. The liquid refrigerant, on the other hand, enters the evaporator through a pipeline for cooling. The economizer 100 is connected to the condenser via the inlet 12 and to the evaporator via the outlet 13. The main body of the economizer 100 is a generally cylindrical shell 10, which is typically placed horizontally, with its axis parallel to the horizontal direction. Both the inlet 12 and the outlet 13 are located on the shell 10, specifically at the lower part of the shell 10, allowing the separated liquid refrigerant to flow along the bottom side of the shell 10. The baffle assembly 20 can be formed by combining multiple plates or by integral molding. The baffle assembly 20 can be fixedly connected to the inside of the housing 10 by welding or snap-fitting, or fixed to the partition separating the gas phase zone and the liquid phase zone inside the economizer 100. The baffle assembly 20 can be configured in an L-shape, that is, the baffle assembly 20 is formed by combining two plates, one of which is positioned opposite to the inlet 12 and fixed to the housing 10 by the other plate. The through hole 22 can be set on the plate opposite to the inlet 12, or on the plate connected to the housing 10, or both can have through holes 22. A buffer cavity 21 is formed between the two plates and the housing 10 to reduce the velocity of the large flow of refrigerant entering from the inlet 12 and reduce the liquid level fluctuation in the economizer 100. The baffle assembly 20 can also be composed of three plates, which are connected in sequence to form a structure covering the inlet 12. All three plates can be connected to the inside of the housing 10, or at least one of them can be fixed to the housing 10, making the buffer cavity 21 more closed and able to significantly reduce the flow rate of the refrigerant entering from the inlet 12.

[0037] It is important to understand that the positions of inlet 12 and outlet 13 on the shell 10 are not specifically limited, as long as the liquid refrigerant can flow normally. The buffer cavity 21 formed between the baffle assembly 20 and the shell 10 can be closed, allowing the refrigerant to flow out only through the through hole 22, or it can be semi-closed, with a gap between the shell 10 and the baffle assembly 20, allowing the refrigerant to flow out through the gap. For example, the baffle assembly 20 includes two plates arranged in an L-shape. One plate is positioned opposite to the inlet 12 and connected to the shell 10 through the other plate. The plate connected to the shell 10 is positioned between the inlet 12 and the outlet 13, and the through hole 22 is positioned on the plate opposite to the inlet 12, thus forming a buffer cavity 21 between the baffle assembly 20 and the shell 10 to slow down the large flow of refrigerant. The refrigerant is blocked by the plate connected to the shell 10 and flows out through the through hole 22 or the side of the baffle assembly 20 opposite to the outlet 13, thereby reducing liquid surface fluctuations. Alternatively, the shape of the baffle assembly 20 can be adapted to the portion of the receiving cavity 11 located near the inlet 12, such that the edge of the baffle assembly 20 is connected to the inner side of the housing 10, forming a buffer cavity 21 that communicates with the receiving cavity 11 only through the through hole 22.

[0038] In some embodiments of the present invention, the baffle assembly 20 includes a first baffle 23, and a plurality of through holes 22 are disposed on the first baffle 23. Along the flow direction of the inlet 12, at least a portion of the first baffle 23 is disposed opposite to the inlet 12.

[0039] It can be seen that by setting the first baffle 23 opposite to the inlet 12, the high flow rate of refrigerant in the inlet 12 is reduced, the liquid level fluctuation is reduced, and the first baffle 23 is located in the flow direction of the inlet 12, which can not significantly increase the flow resistance, thus helping to improve the flow efficiency of the system and thereby improve the working efficiency of the heat pump system.

[0040] For example, the first baffle 23 can be adapted to the shape of the receiving cavity 11 and is rectangular. The edges of the opposite sides of the first baffle 23 are connected to the housing 10. The first baffle 23 can be larger than the inlet 12, so that the volume of the buffer space is larger and the adverse effect of setting the buffer space on the increase of flow resistance is reduced. The through holes 22 can be arranged in a rectangular array or a circular array on the first baffle 23, so that the rectification effect is better and the flow efficiency of the economizer 100 is improved.

[0041] In some embodiments of the present invention, the baffle assembly 20 further includes two side plates 24 disposed opposite to each other, the first baffle 23 and the inlet 12 are both located between the two side plates 24, and the opposite sides of the first baffle 23 are respectively connected to the housing 10 through a side plate 24.

[0042] It can be seen that by setting two side plates 24 that are set opposite to each other, the first baffle 23 is fixed, improving the connection reliability between the baffle assembly 20 and the housing 10. On the other hand, the sealing of the buffer space is improved, and the large flow of refrigerant in the inlet 12 is better reduced, thus reducing the liquid level fluctuation in the economizer 100.

[0043] For example, the side plate 24 can be adapted to the shape of the receiving cavity 11. For example, the side plate 24 is semi-circular or arc-shaped, so that the opposite two sides of the side plate 24 are connected to the cavity wall of the receiving cavity 11 and the first baffle 23 respectively, to achieve a nearly closed buffer space. The side plate 24 can also be a plate structure of other shapes, which can also serve the functions of connecting the first baffle 23 and the shell 10, as well as closing the buffer space.

[0044] It is understandable that the side plate 24 and the first baffle 23 can be made of the same material as the housing 10, and the connection method can be welding or snap-fit.

[0045] In some embodiments of this utility model, the receiving cavity 11 is in the shape of a rotating body. Along the first direction (the height direction of the receiving cavity 11), the inlet 12 and the outlet 13 are located on the same side of the receiving cavity 11, and along the second direction (the axial direction of the receiving cavity 11), the inlet 12 and the outlet 13 are spaced apart.

[0046] As can be seen, by setting the inlet 12 and outlet 13 on the bottom side of the receiving cavity 11 and spacing them along the axial direction, the liquid refrigerant flows in the lower half of the receiving cavity 11, and the separated gaseous refrigerant flows upward and is discharged, making the flow path in the receiving cavity 11 more reasonable and helping to improve the gas-liquid separation effect of the economizer 100.

[0047] For example, the receiving cavity 11 can be cylindrical or other axially symmetrical rotating body structure. The inlet 12 and outlet 13 can be respectively located at the bottom end of the receiving cavity 11 along the axial direction, ensuring sufficient flow path for the refrigerant between the inlet 12 and outlet 13, increasing its flash evaporation time, and thus improving the gas-liquid separation effect. Specifically, the inlet 12 and outlet 13 can be located at the bottom of the receiving cavity 11 along its height direction.

[0048] It is understandable that the height direction of the receiving cavity 11 refers to the height of the receiving cavity 11 in the vertical direction when the receiving cavity 11 is placed flat, that is, when the axis of the receiving cavity 11 is parallel to the horizontal direction.

[0049] In some embodiments of this utility model, the economizer 100 further includes a second baffle 25, which is located in the receiving cavity 11 and blocks part of the outlet 13. The second baffle 25 is arranged parallel to or at an angle to the flow direction of the outlet 13.

[0050] It can be seen that by setting a second baffle 25 at the outlet 13, the second baffle 25 partially blocks the outlet 13, so that the refrigerant at that point is blocked by the second baffle 25, making it less likely to be entrained, and thus making it less likely for the gaseous refrigerant to be drawn into the evaporator at the outlet 13.

[0051] For example, the second baffle 25 can be a rectangular plate or an arc plate. The second baffle 25 can be fixed inside the housing 10 or fixed on the partition assembly 30. The second baffle 25 can be a flat plate structure, with its plate surface arranged parallel to the flow direction of the outlet 13 or at a certain angle, so that when a swirling phenomenon tends to occur at the outlet 13, the swirling flow can be blocked by the second baffle 25 and cannot be generated.

[0052] In some embodiments of this utility model, the economizer 100 further includes an air supply bend 15, which is disposed in the receiving cavity 11 and communicates with the exhaust port 14.

[0053] As can be seen, by setting the exhaust port 14, the gaseous refrigerant after gas-liquid separation is input into the compressor to replenish the compressor and continue to participate in the cycle, thereby improving the operating efficiency of the compressor. In order to reduce the liquid refrigerant being drawn into the compressor, a bend in the gas supply pipe 15 with a bent structure is set at the exhaust port 14, so that the liquid refrigerant impacts the gas supply pipe 15 and prevents it from entering the gas supply pipe.

[0054] For example, the gas inlet bend 15 may have one or more bends, such as S-shaped or J-shaped, so that the liquid refrigerant can impact the inner or outer wall of the gas inlet bend 15, reducing the flow rate and decreasing the probability of it continuing to flow into the compressor. The gas inlet bend 15 can be connected to the housing 10 by welding or snap-fitting.

[0055] In some embodiments of this utility model, the economizer 100 further includes a partition assembly 30. Along a first direction (the height direction of the receiving cavity 11), the partition assembly 30 divides the receiving cavity 11 into a liquid phase cavity 112 and a gas phase cavity 111. The gas phase cavity 111 is located above the liquid phase cavity 112. The baffle assembly 20 is located inside the liquid phase cavity 112. The inlet 12 and the outlet 13 are both connected to the liquid phase cavity 112. The gas supply bend 15 is located inside the gas phase cavity 111. The exhaust port 14 is connected to the gas phase cavity 111. The partition assembly 30 has a filter structure 31. The liquid phase cavity 112 is connected to the gas phase cavity 111 through the filter structure 31.

[0056] As can be seen, by setting the baffle assembly 30, the receiving cavity 11 is divided into a gas phase cavity 111 and a liquid phase cavity 112. The liquid phase cavity 112 guides the refrigerant and restricts the liquid refrigerant from flowing through the inlet 12 to the outlet 13. The filter structure 31 of the baffle assembly 30 can filter the refrigerant flowing from the liquid phase cavity 112 to the gas phase cavity 111, so that the liquid refrigerant carried in the gas phase refrigerant is filtered out by the filter structure 31, thereby reducing the phenomenon of liquid refrigerant flowing to the gas injection bend 15 and avoiding the liquid refrigerant from affecting the operation of the compressor.

[0057] For example, the partition assembly 30 may be generally rectangular. The opposite sides of the partition assembly 30 along its width direction can be welded to the peripheral wall of the housing 10. There are gaps between the two sides of the partition assembly 30 along its length direction and the hemispherical walls at both ends of the housing 10, where end plates can be installed. The end plates are perpendicular to the two sides of the partition assembly 30 along its length direction, and the upper and lower sides of the end plates are connected to the peripheral wall of the housing 10, so that the upper half of the two end plates forms a gas phase cavity 111 with the partition assembly 30, and the lower half of the two end plates forms a liquid phase cavity 112 with the partition assembly 30. The two ends of the partition assembly 30 along its length direction may also be provided with arc-shaped edges, so that these two ends are adapted to the receiving cavity 11 and extend directly to the cavity wall of the receiving cavity 11, eliminating the need for additional end plates. The filter structure 31 can be a porous plate structure, and multiple layers can be stacked. Adjacent layers can be spaced apart to contact the liquid refrigerant, causing it to condense on the outer surface of the filter structure 31 and flow down into the liquid phase cavity 112 under gravity.

[0058] It is understandable that the specific structure of the filter structure 31 is not limited, and can refer to the existing filter structure 31 of the economizer 100, which is set as a porous plate or a mesh structure.

[0059] In some embodiments of this utility model, along the second direction (axial direction of the receiving cavity 11), the filter structure 31 is located between the air supply bend 15 and one end of the receiving cavity 11, and the end of the air supply bend 15 facing away from the exhaust port 14 is arranged towards the other end of the receiving cavity 11.

[0060] As can be seen, by setting the inlet 12 of the gas supply bend 15 towards the end of the receiving cavity 11 away from the filter structure 31, the refrigerant from the filter structure 31 will collide with the pipe wall of the gas supply bend 15 when it flows into the gas supply bend 15, preventing the liquid refrigerant from flowing into the gas supply bend 15. Furthermore, the liquid refrigerant after colliding with the pipe wall will fall onto the baffle assembly 30, preventing the liquid refrigerant from entering the compressor from the gas supply bend 15 and affecting the normal operation of the compressor.

[0061] For example, the gas supply bend 15 can be J-shaped, with its straight section connected to the exhaust port 14. The inlet 12 of the bend section faces away from the filter structure 31 along its own axial direction towards the receiving cavity 11, thereby reducing the phenomenon of liquid refrigerant flowing from the filter structure 31 into the gas supply bend 15. The exhaust port 14 can be located at the top of the receiving cavity 11 along the height direction, in which case the gas supply bend 15 is also located on the top side of the gas phase cavity 111.

[0062] In some embodiments of this utility model, along the first direction (the height direction of the receiving cavity 11), the exhaust port 14 is arranged opposite to the inlet 12, and the filter structure 31 is arranged opposite to the outlet 13.

[0063] As can be seen, by aligning the filter structure 31 with the outlet 13, the liquid refrigerant flowing down from the filter structure 31 can directly fall into the outlet 13 and flow from the outlet 13 to the evaporator, reducing refrigerant retention and improving the operating efficiency of the economizer 100. Furthermore, by aligning the exhaust port 14 with the inlet 12, a U-shaped flow path is formed within the economizer 100, making it less likely for the liquid refrigerant to flow into the gas injection bend 15, reducing liquid carryover during gas injection, and improving the reliability of the downstream compressor.

[0064] The following describes the operating principle of the economizer 100 using a complete embodiment. When the economizer 100 is working, the refrigerant, after being throttled and flashed by the throttling device, enters the receiving cavity 11 through the inlet 12. Under the action of the baffle assembly 20, gas-liquid separation occurs, and the flow velocity is reduced within the buffer cavity 21, minimizing liquid surface fluctuations after a large flow of refrigerant enters the receiving cavity 11. The gas-liquid separated refrigerant continues to flow along the liquid phase cavity 112 towards the outlet 13, with a portion of the liquid phase refrigerant flowing out from the outlet 13. At this time, it is affected by the second baffle 2 at the outlet 13. The function of the filter structure 31 prevents the refrigerant from forming a vortex at the outlet 13. At the same time, some of the refrigerant flows through the filter structure 31 to the gas phase cavity 111. At this time, the filter structure 31 filters out the liquid refrigerant carried by the gas phase refrigerant and drops it into the outlet 13. The refrigerant flowing into the gas phase cavity 111 continues to flow towards the exhaust port 14. The remaining liquid refrigerant carried by the gas phase refrigerant impacts the wall of the gas injection bend 15 and falls onto the baffle assembly 30, preventing the liquid refrigerant from entering the gas injection bend 15 and improving the operational reliability of the downstream compressor.

[0065] The second aspect of this utility model provides a heat pump system, including the economizer 100 proposed in the first aspect of this utility model.

[0066] The heat pump system proposed in the second aspect of this utility model has good operational reliability. By setting a baffle assembly 20 at the inlet 12 of the economizer 100, a buffer cavity 21 is formed between the baffle assembly 20 and the housing 10. The large flow rate of refrigerant entering the housing 10 is buffered by the buffer cavity 21, reducing the refrigerant flow rate, and then flows out through multiple through holes 22 on the baffle assembly 20. This makes the liquid level fluctuation in the economizer 100 more gradual, thereby increasing the liquid seal time at the outlet 13 of the economizer 100. This makes it difficult for gaseous refrigerant to enter the downstream evaporator from the outlet 13, reducing the phenomenon of liquid carryover during evaporation and improving the operational reliability of the heat pump system.

[0067] It is understandable that a heat pump system can be a high-temperature centrifugal heat pump from a chiller unit.

[0068] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An economizer characterized by, The economizer comprises: a shell, an accommodating cavity is formed inside the shell, the shell has an inlet, an outlet and an exhaust port, the inlet, the outlet and the exhaust port all communicate with the accommodating cavity; a baffle assembly is arranged in the accommodating cavity, a buffer cavity is defined between the baffle assembly and part of the shell, the inlet communicates with the buffer cavity, the baffle assembly is provided with a plurality of through holes, and the buffer cavity communicates with the accommodating cavity through the through holes.

2. The economizer of claim 1, wherein The baffle assembly comprises a first baffle, at least part of the first baffle is arranged opposite to the inlet along the flow direction of the inlet, and the through holes are arranged on the first baffle.

3. The economizer of claim 2, wherein, The baffle assembly further comprises two opposite side plates, the first baffle and the inlet are located between the two side plates, and opposite sides of the first baffle are connected to the shell through one of the side plates respectively.

4. The economizer of claim 3, wherein, The inlet and the outlet are located on the same side of the accommodating cavity along a first direction, and the inlet and the outlet are arranged at intervals along a second direction. The first direction is perpendicular to the second direction.

5. The economizer of claim 1, wherein, The economizer further comprises a second baffle, the second baffle is located in the accommodating cavity and shields part of the outlet, and the second baffle is arranged parallel to the flow direction of the outlet or at an angle.

6. The economizer of claim 4, wherein, The economizer further comprises a gas supplement elbow, the gas supplement elbow is arranged in the accommodating cavity and communicates with the exhaust port.

7. The economizer of claim 6, wherein, The economizer further comprises a partition assembly, along the first direction, the partition assembly divides the accommodating cavity into a liquid phase cavity and a gas phase cavity, the gas phase cavity is located above the liquid phase cavity, the baffle assembly is located in the liquid phase cavity, the inlet and the outlet both communicate with the liquid phase cavity, the gas supplement elbow is located in the gas phase cavity, the exhaust port communicates with the gas phase cavity, the partition assembly has a filter structure, and the liquid phase cavity communicates with the gas phase cavity through the filter structure.

8. The economizer of claim 7, wherein, Along the second direction, the filter structure is located between the gas supplement elbow and one end of the accommodating cavity, and an end of the gas supplement elbow away from the exhaust port is arranged towards the other end of the accommodating cavity.

9. The economizer of claim 7, wherein, Along the first direction, the exhaust port is arranged opposite to the inlet, and the filter structure is arranged opposite to the outlet.

10. A heat pump system, characterized by, The economizer comprises an economizer according to any one of claims 1 to 9.

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