Droplet evaporation device for chiller and chiller

Abstract

The present application relates to the technical field of air conditioning, and discloses a liquid droplet evaporation device for a chiller, including a first channel that can be connected to a pipeline between an evaporator and a compressor of the chiller; and a second channel that is configured to exchange heat with the first channel and can be connected to a heat exchange medium. The first channel of the liquid droplet evaporation device can be connected to the pipeline between the evaporator and the compressor of the chiller, so that the refrigerant vapor exchanges heat with the heat exchange medium in the second channel through the first channel, absorbs the heat of the heat exchange medium in the second channel, and evaporates the refrigerant droplets carried in the refrigerant vapor, thereby eliminating the problem of liquid inhalation of the compressor and improving the operating reliability and performance of the unit. A chiller is also disclosed.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, for example, to a droplet evaporation device for a chiller and a chiller. Background Art

[0002] At present, chillers, such as falling film chillers, have broad application prospects in the field of central air conditioning. In actual applications, the unevaporated refrigerant droplets in the evaporator are easily carried into the suction pipe with the evaporating air flow, and then enter the compressor, which not only reduces the performance of the unit, but also easily causes liquid hammer in the compressor due to the suction liquid, causing damage to the unit. At the same time, after the refrigerant liquid enters the compressor, the oil leakage of the compressor increases, and the compressor is easily damaged due to lack of oil. Suction liquid seriously affects the operating reliability and performance of the unit. In the process of realizing the embodiments of the present disclosure, it is found that there are at least the following problems in the related technology: the existing chillers have the phenomenon of suction liquid, which reduces the operating reliability and performance of the unit. Summary of the invention

[0003] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0004] The disclosed embodiments provide a droplet evaporation device for a chiller and a chiller to solve the technical problem that the existing chiller has a phenomenon of air suction carrying liquid, which reduces the operating reliability and performance of the chiller.

[0005] In some embodiments, a droplet evaporation device for a chiller comprises:

[0006] The first channel can be connected to the pipeline between the evaporator and the compressor of the chiller;

[0007] The second channel is configured to exchange heat with the first channel and can be connected to a heat exchange medium.

[0008] In some embodiments, the droplet evaporation device for a chiller further includes:

[0009] The third channel is configured to exchange heat with the first channel and can be connected to a heat exchange medium.

[0010] In some embodiments, a chiller comprises a compressor, an evaporator, a condenser and a throttling device, wherein the chiller further comprises a droplet evaporation device as claimed in any one of claims 1 to 5;

[0011] The first channel of the droplet evaporation device is connected in series or in parallel to the pipeline between the gas phase outlet of the evaporator and the air intake of the compressor; the second channel of the droplet evaporation device is connected to the heat exchange medium;

[0012] When the droplet evaporation device includes a third channel, the third channel is connected to a heat exchange medium.

[0013] The embodiments of the present disclosure provide a droplet evaporation device for a chiller and a chiller, which can achieve the following technical effects:

[0014] The droplet evaporation device of the disclosed embodiment can have a first channel connected to the pipeline between the evaporator and the compressor of the chiller, so that the refrigerant vapor discharged from the evaporator can pass through the first channel of the droplet evaporation device before entering the compressor, exchange heat with the heat exchange medium in the second channel, absorb the heat of the heat exchange medium in the second channel, and evaporate the refrigerant droplets carried in the refrigerant vapor, thereby eliminating the problem of liquid inhalation by the compressor and improving the operating reliability and performance of the unit.

[0015] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by corresponding drawings, and these exemplary descriptions and drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0017] Figure 1 is a schematic structural diagram of a droplet evaporation device provided in an embodiment of the present disclosure;

[0018] Figure 2 yes Figure 1 Schematic diagram of the AA section structure;

[0019] Figure 3 is a schematic structural diagram of a droplet evaporation device provided in an embodiment of the present disclosure;

[0020] Figure 4 yes Figure 3 Schematic diagram of the cross-section structure along the BB axis;

[0021] Figure 5 The present invention provides a droplet evaporation device. Figure 3 Schematic diagram of the cross-sectional structure along the BB direction;

[0022] Figure 6 is a schematic structural diagram of a droplet evaporation device provided in an embodiment of the present disclosure;

[0023] Figure 7 yes Figure 6 Schematic diagram of the CC section structure;

[0024] Figure 8 The present invention provides a droplet evaporation device. Figure 6 Schematic diagram of the cross-sectional structure along the CC direction;

[0025] Fig. 9 The present invention provides a droplet evaporation device. Figure 6 Schematic diagram of the cross-sectional structure along the CC direction;

[0026] Fig.10 is a schematic structural diagram of a droplet evaporation device provided in an embodiment of the present disclosure;

[0027] Fig.11 yes Fig.10 Schematic diagram of the structure in the middle DD section;

[0028] Fig.12 The present invention provides a droplet evaporation device. Fig.10 Schematic diagram of the cross-sectional structure along the DD direction;

[0029] Fig.13 is a schematic diagram of a longitudinal cross-sectional structure of a droplet evaporation device provided in an embodiment of the present disclosure;

[0030] Fig.14 is a structural schematic diagram of a chiller provided by an embodiment of the present disclosure;

[0031] Fig.15 is a structural schematic diagram of a chiller provided by an embodiment of the present disclosure;

[0032] Fig.16 is a structural schematic diagram of a chiller provided by an embodiment of the present disclosure;

[0033] Fig.17 is a structural schematic diagram of a chiller provided by an embodiment of the present disclosure;

[0034] Fig.18 It is a structural schematic diagram of an existing chiller;

[0035] In the above structural diagram, the dotted lines shown are structural lines of the internal structure.

[0036] Reference numerals:

[0037] 100, droplet evaporation device; 101, first channel; 102, second channel; 103, third channel; 104, partition plate; 110, inner tube; 111, air inlet; 112, air outlet; 120, outer tube; 121, medium inlet; 122, medium outlet; 130, sleeve; 131, second medium inlet; 132, second medium outlet; 140, first heat-conducting fin; 150, second heat-conducting fin; 160, third heat-conducting fin; 170, integral heat-conducting fin; 200, compressor; 201, air intake; 202, air outlet; 210, evaporator; 220, condenser; 230, throttling device; 240, valve; 241, first pipeline; 242, second pipeline; 243, third pipeline. DETAILED DESCRIPTION

[0038] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0039] In this document, it should be understood that relational terms such as first and second, etc. are merely used to distinguish one entity or structure from another entity or structure, but do not require or imply any actual relationship or order between these entities or structures.

[0040] In this document, it is necessary to understand that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0041] In this document, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0042] In this document, it is to be understood that the term "plurality" means two or more than two.

[0043] The present disclosure provides a droplet evaporation device for a chiller. Figures 1 to 12 As shown, the droplet evaporation device 100 includes a first channel 101 and a second channel 102; the first channel 101 can be connected to the pipeline between the evaporator and the compressor of the chiller; the second channel 102 is configured to exchange heat with the first channel 101 and can be connected to a heat exchange medium.

[0044] In the present disclosure, Fig.18 As shown, the existing chiller generally includes an evaporator 210 (for example, a falling film evaporator), a compressor 200, a condenser 220 and a throttling device 230. The refrigerant vapor evaporated by the evaporator 210 enters the compressor 200 through the air intake port 201 of the compressor 200, is compressed by the compressor 200, forms high-temperature and high-pressure exhaust gas, and is discharged through the exhaust port 202 of the compressor 200, enters the condenser 220, exchanges heat with cooling water in the condenser 220, and condenses to form a liquid refrigerant with a higher temperature and a higher pressure, and then enters the throttling device 230. After throttling by the throttling device 230, a low-temperature and low-pressure gas-liquid two-phase refrigerant is formed, and enters the evaporator 210. After exchanging heat with the refrigerant water in the evaporator 210, it evaporates into refrigerant vapor, and then enters the compressor through the air intake port 201 of the compressor 200, thereby realizing the entire refrigeration cycle / heating cycle.

[0045] The droplet evaporation device 100 of the disclosed embodiment can have a first channel 101 connected to a pipeline between the evaporator 210 and the compressor 200 of the chiller, so that the refrigerant vapor discharged from the evaporator 210 can, before entering the compressor 200, pass through the first channel 101 of the droplet evaporation device 100, exchange heat with the heat exchange medium in the second channel 102, absorb the heat of the heat exchange medium in the second channel 102, and evaporate the refrigerant droplets carried in the refrigerant vapor, thereby eliminating the problem of liquid inhalation in the compressor and improving the operating reliability and performance of the unit.

[0046] In the disclosed embodiment, the heat exchange medium connected to the second channel 102 of the droplet evaporation device 100 is a high-temperature heat exchange medium, specifically, a heat exchange medium having a temperature higher than the temperature of the medium (e.g., refrigerant vapor) flowing in the first channel 101. This ensures that heat can be supplied to the refrigerant vapor flowing in the first channel 101, so that the refrigerant droplets carried therein absorb heat and evaporate. Therefore, the high-temperature heat exchange medium connected to the second channel 102 can be selected according to actual conditions.

[0047] Optionally, the second channel 102 may be connected to a pipeline between the condenser 120 and the throttling device 130 of the chiller (eg, Fig.14 and Fig.15The second pipeline 242 is described. That is, the liquid refrigerant with a higher temperature and a higher pressure discharged after condensation by the condenser 120 is used as a heat exchange medium. In this embodiment, the liquid refrigerant with a higher temperature and a higher pressure discharged after condensation by the condenser 220 first enters the second channel 102 of the droplet evaporation device 100 before entering the throttling device 230, exchanges heat with the refrigerant vapor flowing through the first channel 101, and then flows into the throttling device 230. The heat inside the refrigeration cycle itself is used to heat the refrigerant vapor to complete the heat exchange. The supercooling of the liquid refrigerant is improved, thereby improving the energy efficiency of the chiller.

[0048] Optionally, the second channel 102 can be connected to the return water pipeline on the refrigerant return water interface of the evaporator of the chiller (such as Fig.16 The third pipeline 243 is described. That is, the refrigerant return water from the central air-conditioning system (high-temperature refrigerant return water in the refrigeration cycle) is used as the heat exchange medium. In this embodiment, the refrigerant return water from the central air-conditioning system (high-temperature refrigerant return water in the refrigeration cycle) is connected to the second channel 102, and heat exchanged with the refrigerant vapor entering the first channel 101. The refrigerant vapor absorbs heat and takes away part of the heat in the high-temperature refrigerant return water; the temperature of the high-temperature refrigerant return water decreases, and then enters the evaporator, and further exchanges heat with the gas-liquid two-phase refrigerant in the evaporator. The temperature of the refrigerant water further decreases, and after flowing out of the evaporator, it enters the central air-conditioning system. The cooling capacity of the chiller is increased.

[0049] Optionally, the evaporator is a falling film evaporator.

[0050] Of course, the heat exchange medium that can be connected to the second channel 102 of the droplet evaporation device 100 is not limited to the above two types, and other easily available high-temperature heat exchange medium can also be connected.

[0051] In the embodiment of the present disclosure, the specific structural form of the first channel 101 and the second channel 102 of the droplet evaporation device 100 is not limited, as long as the two can achieve heat exchange.

[0052] In some embodiments, Figure 1 and Figure 2 As shown, the first droplet evaporation device 100 includes an inner tube 110 and an outer tube 120 ; the inner tube 110 is configured with a first channel 101 ; the outer tube 120 is sleeved outside the inner tube 110 ; the outer annular channel between the outer tube 120 and the inner tube 110 serves as a second channel 102 .

[0053] Optionally, the air inlet end 111 of the inner tube 110 and the first medium outlet end 122 of the outer tube 120 are located on the same side. That is, the air outlet end 112 of the inner tube 110 and the second medium inlet end 121 of the outer tube 120 are located on the same side. Then, the flow directions of the media in the first channel 101 and the second channel 102 are opposite, forming countercurrent heat exchange and improving heat exchange efficiency.

[0054] In some embodiments, the droplet evaporation device 100 further includes a third channel 103 ; the third channel 103 is configured to exchange heat with the first channel 101 ; and a heat exchange medium can be connected.

[0055] In the disclosed embodiment, the heat exchange medium accessible to the third channel 103 is the same as the heat exchange medium accessible to the aforementioned second channel 102. The heat exchange medium accessible to the third channel 103 may be the same as or different from the heat exchange medium accessible to the second channel 102. The provision of the third channel 103 increases the heat exchange amount, evaporates more refrigerant droplets carried in the refrigerant vapor, eliminates the problem of suction liquid carrying of the compressor, and improves the operating reliability and performance of the unit.

[0056] In some embodiments, Figure 6 and Figure 7 As shown, the second droplet evaporation device 100 includes an inner tube 110 and an outer tube 120; the inner tube 110 is configured with a first channel 101; the outer tube 120 is sleeved outside the inner tube 110; an outer annular channel is formed between the outer tube 120 and the inner tube 110. The outer annular channel is divided into two channels along the axial direction, one of which is used as the second channel 102, and the other is used as the third channel 103. A partition plate 104 is radially arranged in the outer annular channel to divide the outer annular channel into two channels.

[0057] Optionally, the partition plate 104 is made of a heat insulating material to avoid heat exchange between the heat exchange medium in the second channel 102 and the heat exchange medium in the third channel 103 .

[0058] In some embodiments, Fig.10 and Fig.11 As shown, the third droplet evaporation device 100 includes a sleeve 130, an inner tube 110 and an outer tube 120; the sleeve 130 is configured with a third channel 103; the sleeve 130 is arranged in the inner tube 110, and an inner annular channel is formed between the outer wall of the sleeve 130 and the inner tube 110, and the inner annular channel serves as the first channel 101; the outer tube 120 is sleeved outside the inner tube 110; an outer annular channel is formed between the outer tube 120 and the inner tube 110, and the outer annular channel serves as the second channel 102.

[0059] Optionally, the air inlet end 111 of the inner tube 110, the first medium outflow end 122 of the outer tube 120, and the second medium outflow end 132 of the sleeve 130 are located on the same side. That is, the air outlet end 112 of the inner tube 110, the first medium inflow end 121 of the outer tube 120, and the second medium inflow end 131 of the sleeve 130 are located on the same side. Then, the flow direction of the heat exchange medium in the second channel 102 and the third channel 103 is the same, but opposite to the flow direction of the medium in the first channel 101, forming countercurrent heat exchange and improving heat exchange efficiency.

[0060] In some embodiments, in combination Figures 3 to 12 As shown, the droplet evaporation device 100 further includes a first heat-conducting fin 140 and / or a second heat-conducting fin 150. The first heat-conducting fin 140 is disposed in the first channel 101 and is connected to a heat exchange wall (e.g., Figure 4 The second heat-conducting fin 150 is disposed in the second channel 102 and connected to the heat exchange wall between the first channel 101 and the second channel 102 (for example, Figure 4 The inner tube 110 is connected to the wall of the inner tube 110 shown.

[0061] When the droplet evaporation device 100 includes the third channel 103, the first heat conducting fin 140 can also be connected to the heat exchange wall between the first channel 101 and the third channel 103 (for example, Figure 8 The wall of the inner tube 110 shown, or Fig.12 The tube wall of the sleeve 130 shown is connected.

[0062] In the disclosed embodiment, the first heat-conducting fin 140 is provided to increase the heat exchange area of ​​the refrigerant vapor circulating in the first channel 101 and improve the heat exchange efficiency. At the same time, after the droplets of refrigerant in the refrigerant vapor collide with the first heat-conducting fin 140, they can adhere to the wall surface of the first heat-conducting fin 140 and evaporate and gasify under the action of the heat conducted on the first heat-conducting fin 140, thereby improving the conversion rate of the droplets of refrigerant. The second heat-conducting fin 150 can increase the heat exchange area of ​​the heat exchange medium in the second channel 102 and improve the heat exchange efficiency.

[0063] In the disclosed embodiment, the first heat conducting fins 140 and the second heat conducting fins 150 are not limited in their arrangement, and may be arranged parallel to the axis of the inner cylinder 110 (or the outer cylinder 120 ) or at a certain angle to the axis.

[0064] Optionally, the first heat conducting fin 140 is located between the gas phase inflow interface and the gas phase outflow interface of the first channel 101. Both ends of the first heat conducting fin 140 do not exceed the interface of the first channel 101 on the same side, so as to ensure that the refrigerant vapor can fill the entire first channel 101.

[0065] Optionally, the second heat conducting fin 150 is located between the medium inlet and outlet of the second channel 101. Both ends of the second heat conducting fin 150 do not exceed the interface of the second channel 102 on the same side, so as to ensure that the heat exchange medium can fill the entire second channel 102.

[0066] like Figure 3 As shown, a droplet evaporation device 100 is provided with a first heat-conducting fin 140 and a second heat-conducting fin 150 on the basis of the first droplet evaporation device 100. One end of the first heat-conducting fin 140 is lower than the gas phase inflow interface of the first channel 101 (for example, the gas inlet end 111 of the inner tube 110), and the other end is lower than the gas phase outflow interface of the first channel 101 (for example, the gas outlet end 112 of the inner tube 110). It is ensured that the refrigerant vapor flowing into the gas phase inflow interface of the first channel 101 can flow into all the sub-channels separated by the first heat-conducting fin 140 after entering, and can all flow to the gas phase outflow interface and be discharged. One end of the second heat-conducting fin 150 is lower than the medium outflow interface of the second channel 102 (for example, the first medium outflow end 122 of the outer tube 120), and the other end is lower than the medium inflow interface of the second channel 102 (for example, the first medium inflow end 121 of the outer tube 120). It is ensured that the heat exchange medium flowing into the medium inlet interface of the second channel 102 can flow into all the sub-channels separated by the second heat conducting fins 150 after entering, and can all flow to the medium outlet interface and be discharged.

[0067] Alternatively, if Figures 3 to 5 As shown, the first heat conducting fin 140 is in the shape of a plane sheet and is arranged in parallel with the axial direction. The second heat conducting fin 150 is in the shape of a plane sheet and is arranged in parallel with the axial direction.

[0068] When the first heat conducting fins 140 and / or the second heat conducting fins 150 are arranged at a certain angle to the axial direction of the inner tube 110 (or the outer tube 120 ), that is, the first heat conducting fins 140 and / or the second heat conducting fins 150 are arranged around the heat exchange wall between the first channel 101 and the second channel 102 .

[0069] Optionally, the first heat-conducting fin 140 is a spiral heat-conducting fin, and the outer arc edge is arranged on the inner wall of the inner tube 110, so that the first channel 101 forms a spiral channel.

[0070] Optionally, the second heat conducting fin 150 is a spiral heat conducting fin, the inner arc edge is arranged on the outer wall of the inner tube 110, and the outer arc edge is arranged on the inner wall of the outer tube 120. The second channel 102 forms a spiral channel.

[0071] In the embodiment of the present disclosure, the number of the first heat conducting fins 140 and the second heat conducting fins 150 is not limited and can be determined according to actual conditions.

[0072] Alternatively, if Figure 4 As shown, there are a plurality of first heat-conducting fins 140, which are distributed in the first channel 101. Optionally, a plurality of planar sheet-shaped first heat-conducting fins 140 are radially arranged in the first channel 101.

[0073] Alternatively, if Figure 4 As shown, there are a plurality of second heat-conducting fins 150, which are distributed in the second channel 102. Optionally, a plurality of planar sheet-shaped second heat-conducting fins 150 are radially arranged in the second channel 102.

[0074] In some embodiments, the droplet evaporation device 100 includes a first heat-conducting fin 140 and a second heat-conducting fin 150 ; the first heat-conducting fin 140 and the second heat-conducting fin 150 are arranged correspondingly; or, they are arranged in a staggered manner.

[0075] In this embodiment, the first heat-conducting fins 140 are arranged on the inner wall of the inner cylinder 110, and the second heat-conducting fins 150 are arranged on the outer wall of the inner cylinder 110. Therefore, the relative position relationship between the first heat-conducting fins 140 and the second heat-conducting fins 150 is not limited, and they can be staggered, that is, not located in the same radial direction; or they can be correspondingly arranged, that is, the connection position of the first heat-conducting fins 140 and the inner wall of the inner cylinder 110 corresponds to the connection position of the second heat-conducting fins 150 and the outer wall of the inner cylinder 110.

[0076] Alternatively, if Figure 4 As shown, the first heat conducting fins 140 and the second heat conducting fins 150 are located in the same radial direction. In this embodiment, the first heat conducting fins 140 and the second heat conducting fins 150 are both planar sheets, and a plurality of first heat conducting fins 140 and a plurality of second heat conducting fins 150 are arranged one by one and are arranged radially as a whole.

[0077] Optionally, the first heat-conducting fins 140 and the second heat-conducting fins 150 are both in the shape of spiral sheets, and are respectively disposed on the inner wall and the outer wall of the inner cylinder 110 .

[0078] Optionally, the first heat-conducting fins 140 are planar sheets and are arranged radially; the second heat-conducting fins 150 are spiral sheets and are wound around the outer wall of the inner cylinder 110, so that the second channel 102 is constructed as a spiral channel.

[0079] In some embodiments, the droplet evaporation device 100 includes a first heat conducting fin 140 and a second heat conducting fin 150; the first heat conducting fin 140 and the second heat conducting fin 150 are connected. Heat can be directly exchanged between the first heat conducting fin 140 and the second heat conducting fin 150, reducing the conduction medium and improving the heat exchange efficiency. Figure 5 As shown, the first heat conducting fin 140 and the second heat conducting fin 150 can be integrally connected to form an integral heat conducting fin 170. The connection between the two can also be achieved through one or more connecting bridge structures.

[0080] In this embodiment, when the first heat-conducting fin 140 and the second heat-conducting fin 150 are connected, an assembly hole is opened on the wall of the inner tube 110, and the whole heat-conducting fin is inserted and fixed through the assembly hole, or after the first heat-conducting fin 140 and the second heat-conducting fin 150 are plugged, connected and fixed through the assembly hole, the assembly gap can be sealed.

[0081] Optionally, the first heat conducting fin 140 is integrally formed with the inner cylinder 110 ; or, the second heat conducting fin 150 is integrally formed with the inner cylinder 110 ; or, both the first heat conducting fin 140 and the second heat conducting fin 150 are integrally formed with the inner cylinder 110 .

[0082] In some embodiments, the droplet evaporation device 100 includes a third channel 103; then, the droplet evaporation device 100 further includes a third heat-conducting fin 160, which is disposed in the third channel 103 and connected to the heat exchange wall between the first channel 101 and the third channel 103 (for example, Figure 8 The wall of the inner tube 110 shown, or Fig.12 The tube wall of the sleeve 130 shown is connected.

[0083] In this embodiment, the third heat-conducting fins 160 can increase the heat exchange area of ​​the heat exchange medium in the third channel 103 and improve the heat exchange efficiency.

[0084] In the disclosed embodiment, the arrangement and quantity of the third heat conducting fins 160 , as well as the relative positional relationship with the first heat conducting fins 140 may be the same as those of the second heat conducting fins 150 , and will not be described in detail herein.

[0085] Optionally, the third heat-conducting fin 160 is located between the medium inlet and outlet interfaces of the third channel 103. The edges of both ends of the third heat-conducting fin 160 do not exceed the interface of the third channel 103 on the side where they are located. This ensures that the heat exchange medium can fill the entire third channel 103. Fig.13The longitudinal cross-sectional structure diagram of the third type of droplet evaporation device 100 including the third heat-conducting fin 160 is shown, wherein one end of the third heat-conducting fin 160 is lower than the medium outflow interface of the third channel 103 (e.g., the second medium outflow end 132 of the sleeve 130), and the other end is lower than the medium inflow interface of the third channel 103 (e.g., the second medium inflow end 131 of the outer tube 130). It is ensured that the heat exchange medium flowing into the medium inflow interface of the third channel 103 can flow into all the sub-channels separated by the third heat-conducting fin 160, and can all flow to the medium outflow interface and be discharged.

[0086] In some embodiments, the droplet evaporation device 100 includes a first heat-conducting fin 140 , a second heat-conducting fin 150 , and a third heat-conducting fin 160 ; the three are arranged correspondingly; or, they are arranged in an interlaced manner.

[0087] In this embodiment, the relative position relationship of the three is not limited, and they can be staggered, that is, not located in the same radial direction. They can also be correspondingly arranged, that is, the connection positions of the first heat-conducting fin 140 and the second heat-conducting fin 150 on the heat exchange wall are consistent, and the connection positions of the first heat-conducting fin 140 and the third heat-conducting fin 160 on the heat exchange wall are consistent.

[0088] Optionally, combined Figures 6 to 9 As shown, for the second type of droplet evaporation device, the second heat-conducting fin 150 and the third heat-conducting fin 160 are respectively arranged in the second channel 102 and the third channel 103 separated by the outer annular channel. The first heat-conducting fin 140 and the second heat-conducting fin 150 are located in the same radial direction; the first heat-conducting fin 140 and the third heat-conducting fin 160 are located in the same radial direction. In this embodiment, the first heat-conducting fin 140, the second heat-conducting fin 150 and the third heat-conducting fin 160 are all planar sheets, and are arranged radially as a whole.

[0089] Optionally, combined Figures 10 to 12 As shown, for the third type of droplet evaporation device, the first heat-conducting fin 140, the second heat-conducting fin 150 and the third heat-conducting fin 160 are located in the same radial direction. In this embodiment, the first heat-conducting fin 140, the second heat-conducting fin 150 and the third heat-conducting fin 160 are all planar sheets, and a plurality of first heat-conducting fins 140, a plurality of second heat-conducting fins 150 and a plurality of third heat-conducting fins 160 are arranged one by one, and the whole is arranged radially.

[0090] Optionally, the first heat conducting fin 140 , the second heat conducting fin 150 and the third heat conducting fin 160 are all in the shape of spiral sheets, and are respectively disposed in the first channel which is an inner annular channel, the second channel which is an outer annular channel, and the third channel.

[0091] Optionally, the first heat-conducting fin 140 is a planar sheet and is arranged radially; the second heat-conducting fin 150 is a spiral sheet and is wound around the outer wall of the inner cylinder 110, and the second channel 102 is constructed as a spiral channel; the third heat-conducting fin 160 is a spiral sheet and is arranged on the inner wall of the sleeve 130, and the third channel 103 is constructed as a spiral channel.

[0092] In some embodiments, the droplet evaporation device 100 includes a first heat-conducting rib 140, a second heat-conducting rib 150 and a third heat-conducting rib 160; the first heat-conducting rib 140 and the second heat-conducting rib 150 are connected; the first heat-conducting rib 140 and the third heat-conducting rib 160 are connected. Heat can be directly exchanged between the first heat-conducting rib 140 and the second heat-conducting rib 150, and the first heat-conducting rib 140 and the third heat-conducting rib 160, thereby reducing the conduction medium and improving the heat exchange efficiency. The first heat-conducting rib 140, the second heat-conducting rib 150 and the third heat-conducting rib 160 can be integrally connected to form an integral heat-conducting rib. The connection between the two can also be achieved through one or more connecting bridge structures. This embodiment is not shown in the figure, combined with Figure 5 , Fig. 9 and Fig.12 The structure shown can be used to understand the structure of this embodiment.

[0093] In this embodiment, when the first heat-conducting fin 140, the second heat-conducting fin 150 and the third heat-conducting fin 160 are connected, assembly holes are respectively opened on the cylinder wall of the inner cylinder 110 and the sleeve 130, and the integral heat-conducting fins are inserted and fixed through the assembly holes, or the first heat-conducting fin 140 and the second heat-conducting fin 150 are plugged and connected and fixed through the assembly holes, and the first heat-conducting fin 140 and the third heat-conducting fin 150 are plugged and connected and fixed through the assembly holes, and then the assembly gap is sealed.

[0094] Optionally, the first heat conducting fin 140 is integrally formed with the inner cylinder 110; or the second heat conducting fin 150 is integrally formed with the inner cylinder 110; or the third heat conducting fin 160 is integrally formed with the sleeve 130. Alternatively, the first heat conducting fin 140, the second heat conducting fin 150 and the third heat conducting fin 160 are integrally formed with the inner cylinder 110 and the sleeve 130.

[0095] The present disclosure discloses a water chiller. Figures 1 to 17 As shown, the chiller includes a compressor 200, an evaporator 210, a condenser 220 and a throttling device 230, wherein the chiller also includes a droplet evaporation device 100. The first channel 101 of the droplet evaporation device 100 is connected in series or in parallel to the pipeline (defined as the first pipeline 241) between the gas phase outlet of the evaporator 210 and the air intake of the compressor 200; the second channel 102 is connected to the heat exchange medium.

[0096] When the droplet evaporation device 100 includes the third channel 103 , the third channel 103 is connected to the heat exchange medium.

[0097] In the chiller of the disclosed embodiment, the first channel 101 of the droplet evaporation device 100 is connected to the pipeline between the gas phase outlet of the evaporator 210 and the air intake of the compressor 200, so that the refrigerant vapor discharged from the evaporator 210 exchanges heat with the heat exchange medium in the second channel 102 through the first channel 101 of the droplet evaporation device 100 before entering the compressor 200, absorbs the heat of the heat exchange medium in the second channel 102, and evaporates the refrigerant droplets carried in the refrigerant vapor, thereby eliminating the problem of liquid inhalation of the compressor and improving the operating reliability and performance of the unit.

[0098] In the chiller of the disclosed embodiment, the heat exchange medium connected to the second channel 102 of the droplet evaporation device 100 is a high-temperature heat exchange medium, specifically, a heat exchange medium having a temperature higher than that of the refrigerant vapor flowing in the first channel 101. This ensures that heat can be supplied to the refrigerant vapor flowing in the first channel 101, so that the refrigerant droplets carried therein absorb heat and evaporate. Therefore, the high-temperature heat exchange medium connected to the second channel 102 can be selected according to actual conditions.

[0099] Optionally, the second channel 102 is connected in series or in parallel to a pipeline (defined as a second pipeline 242) between the liquid phase outlet of the condenser 220 and the inlet end of the throttling device 230. Fig.14 As shown, the second channel 102 is connected in series to the pipeline between the liquid phase outlet of the condenser 220 and the inlet end of the throttling device 230. Fig.15 As shown, the second channel 102 is connected in parallel to the pipeline between the liquid phase outlet of the condenser 220 and the inlet end of the throttling device 230. That is, the liquid refrigerant with a higher temperature and a higher pressure discharged after condensation by the condenser 120 is used as a heat exchange medium. In this embodiment, the liquid refrigerant with a higher temperature and a higher pressure discharged after condensation by the condenser 220 first enters the second channel 102 of the droplet evaporation device 100 before entering the throttling device 230, exchanges heat with the refrigerant vapor flowing through the first channel 101, and then flows into the throttling device 230. The heat inside the refrigeration cycle itself is used to heat the refrigerant vapor to complete the heat exchange. The supercooling of the liquid refrigerant is improved, thereby improving the energy efficiency of the chiller.

[0100] Optionally, the second channel 102 is connected in series or in parallel to a pipeline (defined as the third pipeline 243) connected to the refrigerant return interface of the evaporator 210. Fig.16As shown, the second channel 102 is connected in series to the pipe connected to the refrigerant return water interface of the evaporator 210. That is, the refrigerant return water from the central air-conditioning system (high-temperature refrigerant return water in the refrigeration cycle) is used as the heat exchange medium. In this embodiment, the refrigerant return water from the central air-conditioning system (high-temperature refrigerant return water in the refrigeration cycle) is connected to the second channel 102, and heat is exchanged with the refrigerant vapor entering the first channel 101. The refrigerant vapor absorbs heat and takes away part of the heat in the high-temperature refrigerant return water; the temperature of the high-temperature refrigerant return water is reduced, and then enters the evaporator, and further exchanges heat with the gas-liquid two-phase refrigerant in the evaporator. The temperature of the refrigerant water further drops, and after flowing out of the evaporator, it enters the central air-conditioning system. The cooling capacity of the chiller is increased.

[0101] In the chiller of the disclosed embodiment, the heat exchange medium connected to the third channel 103 of the droplet evaporation device 100 is a high-temperature heat exchange medium, which is the same as the high-temperature heat exchange medium connected to the second channel 102 mentioned above.

[0102] In some embodiments, the droplet evaporation device 100 includes a third channel 103. Then, the third channel 103 is connected in series or in parallel to the pipeline (second pipeline 242) between the liquid phase outlet of the condenser 220 and the inlet end of the throttling device 230; or, the third channel 103 is connected in series or in parallel to the pipeline (third pipeline 243) connected to the refrigerant return interface of the evaporator 210. The heat exchange amount is increased, and more refrigerant droplets carried in the refrigerant vapor are evaporated, eliminating the problem of suction liquid carrying of the compressor, while improving the operating reliability and performance of the unit.

[0103] In the embodiment of the present disclosure, the heat exchange medium connected to the third channel 103 may be the same as or different from the heat exchange medium connected to the second channel 102 .

[0104] Optionally, the second channel 102 of the droplet evaporation device 100 is connected in series or in parallel to the second pipeline 242, and the third channel 103 is connected in series or in parallel to the second pipeline 242; the second channel 102 is connected in parallel to the third channel 103. In this embodiment, the liquid refrigerant with a higher temperature and pressure discharged after condensation by the condenser 220 enters the second channel 102 and the third channel 103 of the droplet evaporation device 100 before entering the throttling device 230, and exchanges heat with the refrigerant vapor flowing through the first channel 101 before flowing into the throttling device 230. The evaporation amount of the droplets in the refrigerant vapor is increased, and the supercooling degree of the liquid refrigerant is further increased, thereby improving the energy efficiency of the chiller.

[0105] Optionally, the second channel 102 of the droplet evaporation device 100 is connected in series or in parallel to the third pipe 243, and the third channel 103 is connected in series or in parallel to the third pipe 243; the second channel 102 is connected in parallel to the third channel 103. In this embodiment, the refrigerant return water from the central air-conditioning system (high-temperature refrigerant return water in the refrigeration cycle) is simultaneously connected to the second channel 102 and the third pipe 103, and enters heat exchange with the refrigerant vapor entering the first channel 101. The refrigerant vapor absorbs heat and takes away part of the heat in the high-temperature refrigerant return water; the temperature of the high-temperature refrigerant return water is reduced, and then enters the evaporator, and further exchanges heat with the gas-liquid two-phase refrigerant in the evaporator. The temperature of the refrigerant water further drops, and after flowing out of the evaporator, it enters the central air-conditioning system. The cooling capacity of the chiller is increased.

[0106] Optionally, the second channel 102 of the droplet evaporation device 100 is connected in series or in parallel to the second pipeline 242, and the third channel 103 is connected in series or in parallel to the third pipeline 243. The evaporation amount of the droplets in the refrigerant vapor is increased, and the supercooling degree of the liquid refrigerant is further increased, and the temperature of the refrigerant water is further reduced, thereby improving the energy efficiency of the chiller. Fig.17 As shown, the second channel 102 of the droplet evaporation device 100 is connected in series to the second pipeline 242 , and the third channel 103 is connected in series to the third pipeline 243 .

[0107] Of course, in the chiller of the disclosed embodiment, the second channel 102 of the droplet evaporation device 100 can also be connected to other readily available pipelines with high-temperature heat exchange medium, and is not limited to being connected to the liquid refrigerant or refrigerant return water in the chiller.

[0108] In the embodiment of the present disclosure, when the channels (second channel 102 and / or third channel 103) of the droplet evaporation device 100 are arranged in parallel on the second pipeline or the third pipeline, a valve is arranged on the parallel section of the second pipeline or the third pipeline. The passage can be switched. Fig.15 Valve 240 as described herein.

[0109] Optionally, the evaporator 210 is a falling film evaporator.

[0110] The droplet evaporation device 100 of the embodiment of the present disclosure is not limited to application in chillers, but can also be applied to other refrigeration / heating cycle systems, for example, a refrigeration / heating cycle system of a household air conditioner.

[0111] The present application is not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A droplet evaporation device for a chiller, characterized in that: include, The first channel can be connected to the pipeline between the evaporator and the compressor of the chiller; A second channel is configured to exchange heat with the first channel and can be connected to a heat exchange medium; and A third channel is configured to exchange heat with the first channel and can be connected to a heat exchange medium; The droplet evaporation device comprises: An inner tube configured with a first passage; An outer tube is sleeved outside the inner tube; an outer annular channel is formed between the outer tube and the inner tube; A partition plate is radially arranged in the outer annular channel to divide the outer annular channel into two channels along the axial direction, one of which is used as the second channel and the other is used as the third channel.

2. The droplet evaporation device according to claim 1, characterized in that: The partitions are made of thermal insulation material.

3. The droplet evaporation device according to claim 1 or 2, characterized in that: Also includes, A first heat-conducting fin is disposed in the first channel and connected to a heat exchange wall between the first channel and the second channel; and / or, a second heat-conducting fin, disposed in the second channel and connected to a heat exchange wall between the first channel and the second channel; and / or, The third heat-conducting fin is arranged in the third channel and connected to the heat exchange wall between the first channel and the third channel.

4. The droplet evaporation device according to claim 3, characterized in that: The droplet evaporation device comprises a first heat-conducting fin, a second heat-conducting fin and a third heat-conducting fin; the first heat-conducting fin and the second heat-conducting fin are arranged correspondingly or staggered with each other; the first heat-conducting fin and the third heat-conducting fin are arranged correspondingly or staggered with each other.

5. The droplet evaporation device according to claim 4, characterized in that: The first heat conducting fin and the second heat conducting fin are located in the same radial direction; the first heat conducting fin and the third heat conducting fin are located in the same radial direction.

6. The droplet evaporation device according to claim 4, characterized in that: The first heat conducting rib is connected to the second heat conducting rib; the first heat conducting rib is connected to the third heat conducting rib.

7. The droplet evaporation device according to claim 4, characterized in that: The first heat-conducting rib and the second heat-conducting rib are integrally connected to form an integral heat-conducting rib; the first heat-conducting rib and the third heat-conducting rib are integrally connected to form an integral heat-conducting rib; The third heat-conducting fin is arranged in the third channel and connected to the heat exchange wall between the first channel and the third channel.

8. A water chiller, comprising a compressor, an evaporator, a condenser and a throttling device, characterized in that: Also includes a droplet evaporation device as claimed in any one of claims 1 to 7; The first channel of the droplet evaporation device is connected in series or in parallel to the pipeline between the gas phase outlet of the evaporator and the air intake of the compressor; The second channel of the droplet evaporation device is connected to the high-temperature heat exchange medium; The third channel of the droplet evaporation device is connected to the high-temperature heat exchange medium; The high-temperature heat exchange medium refers to a heat exchange medium having a temperature higher than the temperature of the refrigerant vapor flowing in the first channel; The air inlet end of the first channel, the first medium outflow end of the second channel, and the second medium outflow end of the third channel are located on the same side.

9. The water chiller according to claim 8, characterized in that: The second channel is connected in series or in parallel to the pipeline between the liquid phase outlet of the condenser and the inlet end of the throttling device; or, the second channel is connected in series or in parallel to the pipeline connected to the refrigerant return water interface of the evaporator; The third channel is connected in series or in parallel to the pipeline between the liquid phase outlet of the condenser and the inlet end of the throttling device; or, the third channel is connected in series or in parallel to the pipeline connected to the refrigerant return water interface of the evaporator.

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