Flooded evaporator and air conditioning unit

Abstract

The utility model relates to a flooded evaporator and an air conditioning unit. The flooded evaporator comprises a main shell, and a flooded area, a preheating area and an air outlet channel which are sequentially arranged in the first direction are arranged in the main shell; the first evaporation pipe is arranged in the full liquid area in a penetrating mode in the second direction intersecting with the first direction; the preheating module is arranged in the preheating area, and the preheating module is provided with a preheating cavity communicating with the flooded area; the second evaporation pipe penetrates through the preheating cavity in the second direction. According to the flooded evaporator, the clean space between the flooded area and the air outlet channel is fully utilized due to the arrangement of the preheating area, and the heat exchange amount of the flooded evaporator is increased. Moreover, under the condition of the same cooling capacity, due to the arrangement of the second evaporation pipes in the preheating area, the pipe distribution number of the first evaporation pipes in the flooded area can be correspondingly reduced, so that the liquid level height of a refrigerant in the flooded area is reduced, and the pressure borne by evaporation bubbles formed on the outer surfaces of the first evaporation pipes is also synchronously reduced; and the evaporation efficiency of the flooded evaporator is improved.

Description

Technical Field

[0001] The present application relates to the field of heat exchange technology, and in particular to a flooded evaporator and an air conditioning unit. Background Art

[0002] At present, the water system components in commercial air conditioning refrigeration systems mainly include evaporators and condensers. The commonly used structures of evaporators include falling film evaporators, flooded evaporators and dry evaporators. The flooded evaporator has a wide range of application prospects in the field of commercial air conditioning due to its compact structure, good heat transfer effect, easy installation and convenient use.

[0003] However, due to structural defects, the existing flooded evaporator has limited space for arranging the evaporation tubes used for heat exchange, which results in a limited heat exchange capacity of the entire unit, thus affecting the further promotion and application of the flooded evaporator. Summary of the invention

[0004] Based on this, it is necessary to provide a flooded evaporator and an air conditioning unit to address the problem of limited heat exchange of the flooded evaporator.

[0005] A flooded evaporator, comprising:

[0006] A main shell, wherein the main shell has a full liquid area, a preheating area and an air outlet channel arranged in sequence in a first direction;

[0007] A first evaporation tube is arranged in the full liquid area along a second direction intersecting the first direction;

[0008] A preheating module is disposed in the preheating area, and the preheating module has a preheating cavity connected to the full liquid area; and

[0009] The second evaporation tube is arranged in the preheating chamber along the second direction.

[0010] In one of the embodiments, the preheating module includes at least one preheating unit, each of the preheating unit has a sub-preheating chamber, the sub-preheating chambers of all the preheating units are connected in sequence, and the sub-preheating chamber of one of the preheating units is connected to the full liquid area, and each of the sub-preheating chambers is penetrated by the second evaporation tube.

[0011] In one of the embodiments, all the preheating units are arranged in sequence along the first direction, the sub-preheating chambers of two adjacent preheating units are connected to each other, and the preheating unit closest to the full liquid area in the first direction is connected to the full liquid area.

[0012] In one of the embodiments, each of the preheating units is provided with a plurality of tube holes connected to the sub-preheating chamber at two opposite ends in the second direction, and the second evaporation tube is penetrated into the sub-preheating chamber through the tube holes.

[0013] In one of the embodiments, the preheating module includes a liquid inlet pipe, one end of which is connected to the sub-preheating chamber of the preheating unit closest to the air outlet channel, and the other end of the liquid inlet pipe extends out of the main shell.

[0014] In one of the embodiments, the preheating module comprises a connecting pipe, and the sub-preheating chambers of two adjacent preheating units are connected to each other through the connecting pipe.

[0015] In one of the embodiments, the preheating unit closest to the full liquid area is provided with a plurality of liquid equalizing holes, and each of the liquid equalizing holes is connected to the sub-preheating chamber and the full liquid area respectively.

[0016] In one embodiment, all the liquid equalizing holes are evenly arranged along the second direction on a side of the preheating unit facing the full liquid area.

[0017] In one embodiment, a barrier is provided in the sub-preheating chamber of the preheating unit closest to the full liquid area, and the barrier separates the sub-preheating chamber into an arrangement chamber and a liquid equalization chamber that are interconnected, and the liquid equalization chamber is located on a side of the arrangement chamber close to the full liquid area;

[0018] The second evaporation tube is arranged in the arrangement cavity, and the liquid balancing hole is opened in the cavity wall of the liquid balancing cavity close to the full liquid area.

[0019] In one of the embodiments, the flooded evaporator further includes a gas-liquid filter, and the gas-liquid filter is located between the preheating zone and the gas outlet channel in the first direction.

[0020] An air conditioning unit comprises the above-mentioned flooded evaporator.

[0021] In the above-mentioned flooded evaporator, the setting of the preheating zone fully utilizes the net space between the flooded zone and the gas outlet channel, effectively increases the total number of evaporation tubes in the main shell, and thus improves the heat exchange capacity of the flooded evaporator. Moreover, under the condition of the same cooling capacity, since the setting of the second evaporation tube in the preheating zone can correspondingly reduce the number of the first evaporation tubes in the flooded zone, the liquid level of the refrigerant in the flooded zone is reduced accordingly, and the static pressure of the liquid column at the bottom of the corresponding flooded zone is reduced accordingly, and the pressure on the formation of evaporation bubbles on the outer surface of the first evaporation tube is also reduced synchronously, making it easier for the evaporation bubbles to break away from the outer surface of the first evaporation tube and overflow the liquid surface, thereby improving the evaporation efficiency of the flooded evaporator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a flooded evaporator according to an embodiment of the present application.

[0023] Figure 2 for Figure 1 The AA cross-sectional view of the flooded evaporator is shown.

[0024] Figure 3 Schematic diagram of the structure of a preheating unit according to an embodiment of the present application.

[0025] Figure 4 for Figure 3 Side view of the preheating unit shown.

[0026] Figure 5 Figure 3 A top view of the preheating unit is shown.

[0027] Figure 6 for Figure 5 A BB sectional view of the preheating unit is shown.

[0028] Figure 7 Schematic diagram of the structure of a preheating module according to an embodiment of the present application.

[0029] Figure 8 Schematic diagram of a second preheating unit according to an embodiment of the present application.

[0030] Fig. 9 for Figure 8 A CC sectional view of the second preheating unit is shown.

[0031] Description of reference numerals:

[0032] 100, full liquid evaporator; 10, main shell; 10a, full liquid area; 10b, preheating area; 10c, air outlet channel; 12, tube sheet; 14, shell side wall; 30, first evaporation tube; 50, preheating module; 52, preheating unit; 521, sub-preheating chamber; 5212, arrangement chamber; 5214, liquid equalization chamber; 522, tube hole; 523, liquid inlet; 524, liquid outlet; 525, liquid equalization hole; 527, barrier; 5272, connecting gap; 52a, first preheating unit; 521a, first sub-preheating chamber; 52b, second preheating unit; 521b, second sub-preheating chamber; 54, liquid inlet pipe; 56, connecting pipe; 70, second evaporation tube; 90, gas-liquid filter. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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 application.

[0035] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0039] As described in the background technology, the existing flooded evaporator is a common structure of air-conditioning units. The flooded evaporator is a type of shell and tube heat exchanger. Its working principle is that the chilled water in the heat exchange tube on the tube side exchanges heat with the low-temperature and low-pressure refrigerant liquid on the shell side, and the refrigerant absorbs heat and evaporates into a low-temperature and low-pressure gas.

[0040] A conventional flooded evaporator includes a main shell, an evaporating tube, and a gas-liquid filter. The evaporating tube is arranged at the bottom of the main shell and is completely immersed in the refrigerant. The gas-liquid filter is arranged at the top of the main shell, so a net space is formed between the evaporating tube and the gas-liquid filter where no evaporating tube or other parts are arranged. In order to reduce the possibility of the evaporator sucking in liquid, it is usually necessary to reserve a certain clearance height to maintain a certain distance between the refrigerant liquid level and the gas-liquid filter, so as to prevent the liquid refrigerant from being sucked into the air outlet and brought into the compressor connected to the evaporator, thereby affecting the performance and life of the compressor.

[0041] However, although the above arrangement can effectively prevent the problem of liquid inhalation in the evaporator, at the same time, the clearance distance requirement between the refrigerant liquid level and the gas-liquid filter screen occupies the layout space of the evaporator tube, and the net space forms an invalid heat exchange area and limits the heat exchange capacity of the evaporator. Moreover, for the same main shell, the greater the cooling capacity of the evaporator unit, the more evaporator tubes need to be arranged. Since the liquid level of the refrigerant needs to be higher than the evaporator tube, the higher the liquid level of the refrigerant. However, the excessively high liquid level of the refrigerant will cause the static pressure of the liquid column on the bottom evaporator tube to be too large, and it will be difficult for evaporation bubbles to form on the outer surface of the evaporator tube, which will lead to a decrease in the evaporation efficiency of the evaporator.

[0042] Based on the above technical issues, please refer to Figure 1 and Figure 2 As shown, an embodiment of the present application provides a flooded evaporator 100 , including a main shell 10 , a first evaporation tube 30 , a preheating module 50 , a second evaporation tube 70 and a gas-liquid filter 90 .

[0043] The main housing 10 has a full liquid area 10a, a preheating area 10b and an air outlet channel 10c arranged in sequence from bottom to top in a first direction, wherein the preheating area 10b is located between the full liquid area 10a and the air outlet channel 10c, and the air outlet channel 10c is connected to an external compressor. The first evaporation tube 30 is arranged in the full liquid area 10a along a second direction intersecting the first direction. The preheating module 50 is arranged in the preheating area 10b, and the preheating module 50 has a preheating cavity connected to the full liquid area 10a, and the second evaporation tube 70 is arranged in the preheating cavity along the second direction. The gas-liquid filter 90 is located between the preheating area 10b and the air outlet channel 10c in the first direction.

[0044] In this way, the refrigerant can first flow through the preheating chamber of the preheating module 50 and exchange heat with the cooling water in the second evaporator tube 70. The preheated refrigerant enters the full liquid area 10a and further exchanges heat with the cooling water in the first evaporator tube 30. The refrigerant absorbs heat and evaporates to form a low-temperature and low-pressure gaseous refrigerant. The gaseous refrigerant is filtered by the gas-liquid filter 90 and then flows out of the main shell 10 through the air outlet channel 10c.

[0045] In the above-mentioned flooded evaporator 100, the setting of the preheating zone 10b makes full use of the net space between the flooded zone 10a and the gas outlet channel 10c, effectively increases the total number of evaporation tubes in the main shell 10, and thus improves the heat exchange capacity of the flooded evaporator 100. Moreover, under the condition of the same cooling capacity, since the setting of the second evaporation tube 70 in the preheating zone 10b can correspondingly reduce the number of the first evaporation tubes 30 in the flooded zone 10a, the liquid level of the refrigerant in the flooded zone 10a is reduced accordingly, and the static pressure of the liquid column at the bottom of the corresponding flooded zone 10a is reduced accordingly, and the pressure on the formation of evaporation bubbles on the outer surface of the first evaporation tube 30 is also reduced synchronously, so that the evaporation bubbles are more likely to break away from the outer surface of the first evaporation tube 30 and overflow the liquid surface, thereby improving the evaporation efficiency of the flooded evaporator 100.

[0046] Please continue reading Figure 1 and Figure 2 The main housing 10 is a horizontally placed cylindrical hollow structure. In the following embodiments, the height direction of the main housing 10 is defined as the first direction (i.e. Figure 1 The length direction of the main housing 10 (i.e., the central axis direction of the main housing 10) is defined as the second direction (i.e., Figure 1 The width direction of the main housing 10 is defined as the third direction (i.e. Figure 2 It should be noted that the above mentioned in the following embodiments refers to Figure 1 The Z-axis arrow in the figure indicates the direction.

[0047] Further, the main shell 10 includes two tube sheets 12 and a shell side wall 14. The two tube sheets 12 are spaced apart in the second direction. The shell side wall 14 is connected between the two tube sheets 12, and the shell side wall 14 surrounds the two tube sheets 12 along the circumference of the tube sheets 12. The shell side wall 14 and the two tube sheets 12 jointly define a storage space. The gas outlet channel 10c is formed at the middle position of the top of the shell side wall 14 in the second direction. The two tube sheets 12 are respectively provided with a plurality of tube holes. The plurality of first evaporation tubes 30 and the plurality of second evaporation tubes 70 can be passed through the tube holes on the tube sheets 12 in the second direction and arranged in the storage space of the main shell 10.

[0048] The preheating module 50 includes at least one preheating unit 52, each preheating unit 52 has a sub-preheating chamber 521, and the sub-preheating chambers 521 of all preheating units 52 are connected in sequence to form a preheating chamber, wherein the sub-preheating chamber 521 of one preheating unit 52 is connected to the full liquid area 10a, and each sub-preheating chamber 521 is penetrated by a second evaporation tube 70. It can be understood that the number of preheating units 52 is not limited and can be set as needed. In some embodiments, the preheating module 50 may also include only one preheating unit 52.

[0049] In this way, the refrigerant can be preheated step by step in the sub-preheating chambers 521 of each preheating unit 52 and the second evaporation tube 70, and then flow out from one of the sub-preheating chambers 521 to enter the full liquid area 10a for further heat exchange with the first evaporation tube 30.

[0050] In some further embodiments, all preheating units 52 are arranged in sequence along the first direction, and each preheating unit 52 is a hollow cubic shell structure to form a sub-preheating chamber 521. The height direction of each preheating unit 52 is parallel to the first direction, the length direction of each preheating unit 52 is parallel to the second direction, and the width direction of each preheating unit 52 is parallel to the third direction. The sub-preheating chambers 521 of two adjacent preheating units 52 in the first direction are connected to each other, and the preheating unit 52 closest to the full liquid area 10a in the first direction is connected to the full liquid area 10a. Figure 3 and Figure 4 As shown, each preheating unit 52 is provided with a plurality of tube holes 522 at the opposite end walls in the second direction, and each tube hole 522 is connected to the sub-preheating chamber 521 , so that a plurality of second evaporation tubes 70 are penetrated in the sub-preheating chamber 521 through the tube holes 522 along the second direction.

[0051] In this way, the refrigerant can flow through the sub-preheating chambers 521 of each preheating unit 52 in sequence along the first direction under the action of gravity, thereby exchanging heat with the second evaporator tubes 70 penetrating each sub-preheating chamber 521 in sequence, and then drip from the bottom sub-preheating chamber 521 to the full liquid area 10a.

[0052] Please combine Figure 2 , Figure 5 as well as Figure 6 As shown, in one embodiment, except for the preheating unit 52 closest to the full liquid area 10a, the other preheating units 52 are respectively provided with a liquid inlet 523 and a liquid outlet 524 at opposite ends in the second direction, and the liquid inlet 523 is located on the upper top wall of the preheating unit 52 facing the air outlet channel 10c, and the liquid outlet 524 is located on the lower bottom wall of the preheating unit 52 facing the full liquid area 10a.

[0053] like Figure 1 , Figure 2 as well as Figure 6 As shown, the preheating module 50 further includes a liquid inlet pipe 54 and a connecting pipe 56. One end of the liquid inlet pipe 54 is connected to a liquid inlet port 523 of the preheating unit 52 closest to the gas outlet channel 10c, and the other end of the liquid inlet pipe 54 extends out of the main housing 10 along a first direction, so that the refrigerant can enter the preheating unit 52 closest to the gas outlet channel 10c through the liquid inlet pipe 54 and the liquid inlet port 523.

[0054] In two adjacent preheating units 52 in the first direction, the liquid outlet 524 of the upper preheating unit 52 is connected to the liquid inlet 523 of the lower preheating unit 52 through the connecting pipe 56, so that the refrigerant in the sub-preheating chamber 521 of the upper preheating unit 52 can flow into the sub-preheating chamber 521 of the lower preheating unit 52 through the connecting pipe 56.

[0055] The preheating unit 52 closest to the full liquid area 10a is provided with a liquid inlet 523 on the upper top wall facing the gas outlet channel 10c, and the liquid inlet 523 of the preheating unit 52 is connected to the liquid outlet 524 of the preheating unit 52 located above it through a connecting pipe 56. The preheating unit 52 is provided with a plurality of liquid balancing holes 525 on the lower bottom wall facing the full liquid area 10a, and the refrigerant in the sub-preheating chamber 521 of the preheating unit 52 falls into the full liquid area 10a through the liquid balancing holes 525. As a preferred embodiment, all the liquid balancing holes 525 are evenly arranged along the second direction on the side of the preheating unit 52 facing the full liquid area 10a, so that the refrigerant falls evenly into the full liquid area 10a in the second direction.

[0056] Furthermore, a barrier 527 is provided in the preheating unit 52 closest to the full liquid area 10a, one end of the barrier 527 is connected to an end wall of the preheating unit 52 provided with a liquid inlet 523 in the second direction, and the other end of the barrier 527 extends along the second direction and is spaced from an end wall of the preheating unit 52 away from the liquid inlet 523 in the second direction to form a connecting gap 5272, thereby separating the sub-preheating chamber 521 into an arrangement chamber 5212 and a liquid equalizing chamber 5214 that are adjacent to each other and connected to each other in the upper and lower directions, the liquid equalizing chamber 5214 being located on a side of the arrangement chamber 5212 close to the full liquid area 10a, the second evaporation tube 70 is penetrated through the arrangement chamber 5212, and the liquid equalizing hole 525 is opened in the chamber wall of the liquid equalizing chamber 5214 close to the full liquid area 10a.

[0057] In this way, the refrigerant entering the preheating unit 52 closest to the full liquid area 10a first flows along the second direction in the arrangement cavity 5212, and exchanges heat with the second evaporator tube 70 during the flow, and then passes through the connecting gap 5272 between the barrier 527 and the end wall of the preheating unit 52 to enter the liquid equalizing cavity 5214, and then evenly drops to the full liquid area 10a through the liquid equalizing hole 525.

[0058] like Figure 7 As shown, the structure of the preheating module 50 is described below by taking the preheating module 50 including two preheating units 52 as an example.

[0059] The two preheating units 52 are stacked in a first direction, and the preheating unit 52 located on the upper side is defined as a first preheating unit 52a, and the preheating unit 52 located on the lower side is defined as a second preheating unit 52b.

[0060] The first preheating unit 52a is a hollow cubic shell structure, and a first sub-preheating chamber 521a is formed in the first preheating unit 52a. Figure 6 As shown, a liquid inlet 523 is provided on the top wall of the first preheating unit 52a near the gas outlet channel 10c, and a liquid outlet 524 is provided on the bottom wall of the first preheating unit 52a near the full liquid area 10a, and the liquid inlet 523 and the liquid outlet 524 are respectively located at opposite ends of the first preheating unit 52a in the second direction. One end of the liquid inlet pipe 54 is connected to the liquid inlet 523, and the other end of the liquid inlet pipe 54 extends out of the main housing 10 along the first direction, and part of the second evaporation tube 70 is arranged in the first sub-preheating chamber 521a along the second direction.

[0061] like Figure 7 , Figure 8 as well as Fig. 9As shown, the second preheating unit 52b is a hollow cubic shell structure, and a second sub-preheating chamber 521b is formed in the second preheating unit 52b. A liquid inlet 523 is provided on the top wall of the second preheating unit 52b near the gas outlet channel 10c, and the liquid inlet 523 is located directly below the first liquid outlet 524 of the first preheating unit 52a, and the two ends of the connecting pipe 56 are respectively connected to the first liquid outlet 524 and the second liquid inlet 523.

[0062] A barrier 527 is provided in the second preheating unit 52b, one end of which is connected to the end wall of the second preheating unit 52b at one end of which the second liquid inlet 523 is provided, and the other end of the barrier 527 extends along the second direction and is spaced from the end wall of the second preheating unit 52b away from the second liquid inlet 523 to form a connecting gap 5272, thereby forming an arrangement chamber 5212 located above and a liquid equalization chamber 5214 located below. Part of the second evaporation tube 70 is arranged in the second sub-preheating chamber 521b along the second direction, and a plurality of liquid equalization holes 525 are opened on the bottom wall of the second preheating unit 52b near the full liquid area 10a, and all the liquid equalization holes 525 are evenly arranged from one end to the other end of the preheating unit 52 along the second direction.

[0063] So, combined Figure 2 and Figure 7 As shown, the refrigerant enters one end of the first sub-preheating chamber 521a of the first preheating unit 52a through the liquid inlet pipe 54, then flows along the second direction toward the other end of the first sub-preheating chamber 521a and exchanges heat with the second evaporator tube 70. The refrigerant that has completed the first-stage preheating enters one end of the arrangement chamber 5212 of the second sub-preheating chamber 521b of the second preheating unit 52b through the connecting pipe 56, then flows along the second direction toward the other end of the second sub-preheating chamber 521b and exchanges heat with the second evaporator tube 70. The refrigerant that has completed the second-stage preheating enters the liquid equalizing chamber 5214 from the connecting notch 5272 on one side of the barrier 527, and finally falls evenly into the full liquid area 10a through the liquid equalizing hole 525.

[0064] like Figure 1 As shown, in some embodiments, the present application also provides a water-cooled air-conditioning unit, including a compressor and the above-mentioned flooded evaporator 100, the air outlet channel 10c of the main shell 10 of the flooded evaporator 100 is connected to the compressor, and the low-temperature and low-pressure gaseous refrigerant can enter the compressor through the air outlet channel 10c for compression.

[0065] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A flooded evaporator, characterized in that: include: A main shell (10), wherein the main shell (10) has a full liquid area (10a), a preheating area (10b) and an air outlet channel (10c) arranged in sequence in a first direction; A first evaporation tube (30) is arranged in the full liquid area (10a) along a second direction intersecting the first direction; A preheating module (50) is disposed in the preheating area (10b), wherein the preheating module (50) has a preheating chamber connected to the full liquid area (10a); as well as The second evaporation tube (70) is arranged to penetrate the preheating chamber along the second direction.

2. The flooded evaporator according to claim 1, characterized in that: The preheating module (50) comprises at least one preheating unit (52), each of the preheating units (52) having a sub-preheating chamber (521), the sub-preheating chambers (521) of all the preheating units (52) being connected in sequence, and the sub-preheating chamber (521) of one of the preheating units (52) being connected to the full liquid area (10a), and each of the sub-preheating chambers (521) being provided with the second evaporation tube (70).

3. The flooded evaporator according to claim 2, characterized in that: All the preheating units (52) are arranged in sequence along the first direction, the sub-preheating chambers (521) of two adjacent preheating units (52) are connected to each other, and the preheating unit (52) closest to the full liquid area (10a) in the first direction is connected to the full liquid area (10a).

4. The flooded evaporator according to claim 3, characterized in that: Each of the preheating units (52) is provided with a plurality of tube holes (522) connected to the sub-preheating chamber (521) at two opposite ends in the second direction, and the second evaporation tube (70) is passed through the tube holes (522) and arranged in the sub-preheating chamber (521).

5. The flooded evaporator according to claim 3, characterized in that: The preheating module (50) comprises a liquid inlet pipe (54), one end of which is connected to the sub-preheating chamber (521) of the preheating unit (52) closest to the air outlet channel (10c), and the other end of which extends out of the main housing (10).

6. The flooded evaporator according to claim 3, characterized in that: The preheating module (50) comprises a connecting pipe (56), and the sub-preheating chambers (521) of two adjacent preheating units (52) are connected to each other via the connecting pipe (56).

7. The flooded evaporator according to claim 3, characterized in that: The preheating unit (52) closest to the full liquid area (10a) is provided with a plurality of liquid balancing holes (525), and each of the liquid balancing holes (525) is respectively connected to the sub-preheating chamber (521) and the full liquid area (10a).

8. The flooded evaporator according to claim 7, characterized in that: All of the liquid balancing holes (525) are evenly arranged along the second direction on a side of the preheating unit (52) facing the full liquid area (10a).

9. The flooded evaporator according to claim 7, characterized in that: A barrier (527) is provided in the sub-preheating chamber (521) of the preheating unit (52) closest to the full liquid area (10a), the barrier (527) separating the sub-preheating chamber (521) into an arrangement chamber (5212) and a liquid equalization chamber (5214) that are interconnected, the liquid equalization chamber (5214) being located on a side of the arrangement chamber (5212) close to the full liquid area (10a); The second evaporation tube (70) is arranged through the arrangement cavity (5212), and the liquid balancing hole (525) is opened on the cavity wall of the liquid balancing cavity (5214) on one side close to the full liquid area (10a).

10. The flooded evaporator according to any one of claims 1 to 9, characterized in that: The flooded evaporator further comprises a gas-liquid filter (90), wherein the gas-liquid filter (90) is located between the preheating zone (10b) and the gas outlet channel (10c) in the first direction.

11. An air conditioning unit, characterized in that: It comprises a flooded evaporator as claimed in any one of claims 1 to 10.

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