Direct expansion unit

Abstract

The utility model discloses a direct expansion unit, relates to the technical field of air conditioners, and aims at solving the problem that the installation space needed by the direct expansion unit is large. The direct expansion unit comprises a shell, a water pan and a first heat exchanger, an air outlet channel is formed in the shell, an air inlet and an air outlet which are communicated with the air outlet channel are formed in the shell, the water pan is arranged on the shell, the first heat exchanger is arranged on the water pan, and at least part of the first heat exchanger is arranged in the air outlet channel. The included angle between the windward side of the first heat exchanger and the plane where the water pan is located is larger than 0 degree and smaller than 90 degrees.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and particularly relates to a direct expansion unit. BACKGROUND

[0002] With the continuous improvement of people's requirements for living and working environment, as an important device for adjusting indoor environment, air conditioning technology is continuously developing and innovating.

[0003] The direct expansion unit is a form of air conditioning product, the unit itself is provided with a compressor, and liquid refrigerant is directly evaporated (i.e. directly expanded) in the evaporator, so as to realize air heat absorption refrigeration. The direct expansion refrigeration mode has high heat exchange efficiency, and does not need cooling water and cooling water system, and is convenient to install.

[0004] Since the direct expansion unit is usually arranged in a specific machine room, however, the volume of the direct expansion unit is usually large, and the space of the machine room is limited, which may result in insufficient installation space. CONTENT OF THE INVENTION

[0005] The present application aims to provide a direct expansion unit, and aims to solve the problem of large installation space required by the direct expansion unit.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] The present application provides a direct expansion unit, which can include a shell, a water pan and a first heat exchanger, the shell is formed with an air outlet channel, and the shell is provided with an air inlet and an air outlet which are communicated with the air outlet channel, the water pan is arranged on the shell, the first heat exchanger is arranged on the water pan, at least part of the first heat exchanger is arranged in the air outlet channel and located between the air inlet and the air outlet, and the included angle between the windward surface of the first heat exchanger and the plane where the water pan is located is greater than 0° and less than 90°.

[0008] In this way, the first heat exchanger can separate the air outlet channel into a first air outlet channel and a second air outlet channel, the first air outlet channel is located at the air inlet side of the first heat exchanger, and the second air outlet channel is located at the air outlet side of the first heat exchanger, since the included angle between the windward surface of the first heat exchanger and the plane where the water pan is located is greater than 0° and less than 90°, at least part of the first air outlet channel and at least part of the second air outlet channel can be located at the same horizontal height, so as to reduce the space layout requirement of the air outlet channel in height, and further reduce the height of the direct expansion unit and save the unit installation space.

[0009] In some embodiments, the direct expansion unit can further include a height increasing piece arranged on the water pan, the first heat exchanger can include a first mounting portion and a second mounting portion, the first mounting portion and the second mounting portion are oppositely arranged, and the first mounting portion is connected to or abuts against one end of the height increasing piece away from the water pan, and the second mounting portion is connected to or abuts against the water pan, so that the first heat exchanger is arranged on the water pan in an inclined manner.

[0010] The first heat exchanger is connected to or abuts against the height increasing piece and the water pan, so that the first heat exchanger is arranged on the water pan in an inclined manner. In this way, multiple stress points can be formed on the first heat exchanger, so that the connection of the first heat exchanger is more stable, and the stability of the direct expansion unit is enhanced.

[0011] In some embodiments, the height increasing piece can include a first height increasing piece and a second height increasing piece, the first height increasing piece and the second height increasing piece are arranged on the water pan in a spaced manner, and the direct expansion unit can further include a first fixing piece, the first fixing piece is connected to one end of the first height increasing piece and the second height increasing piece away from the water pan, and at least part of the first fixing piece is in surface contact with the first mounting portion.

[0012] In this way, the first height increasing piece and the second height increasing piece can form fulcrums for the first heat exchanger, so that the stability of the first heat exchanger is increased. Since the first fixing piece is connected to one end of the first height increasing piece and the second height increasing piece away from the water pan, and at least part of the first fixing piece is in surface contact with the first mounting portion, the first fixing piece can be connected between the first height increasing piece and the second height increasing piece and the first mounting portion, and the supporting area of the first mounting portion can be increased, so that the stability of the first heat exchanger is further increased.

[0013] In some embodiments, the first fixing piece can include a first connecting plate, a second connecting plate and a fixing strip, the first connecting plate is connected to the first height increasing piece, the second connecting plate is connected to the second height increasing piece, the fixing strip extends along the arrangement direction of the first height increasing piece and the second height increasing piece, the fixing strip is connected to the first connecting plate and the second connecting plate, and is in surface contact with the first mounting portion.

[0014] In this way, the contact area between the first fixing piece and the first height increasing piece and the second height increasing piece can be increased, so that the connection of the first fixing piece is more stable, and the stability of the first heat exchanger is further enhanced.

[0015] In some embodiments, the direct expansion unit can further include a second fixing piece, the second fixing piece is connected to the water pan, and at least part of the second fixing piece is in surface contact with the second mounting portion.

[0016] In this way, the second fixing piece can be connected between the water pan and the second mounting portion, and the supporting area of the second mounting portion can be increased, so that the stability of the first heat exchanger is enhanced.

[0017] In some embodiments, the second fixing member can include a first bent edge connected to the water tray and a support plate connected to the first bent edge and in contact with the sidewall of the first heat exchanger, at least part of the sidewall of the first heat exchanger constituting at least part of the second mounting portion.

[0018] In this way, the second fixing member can abut against the first heat exchanger, so that the second mounting portion is connected or abuts against the water tray. Since the support plate is in contact with the sidewall of the first heat exchanger, the contact area between the second fixing member and the first heat exchanger can be increased, so that the installation of the first heat exchanger is more stable.

[0019] In some embodiments, the second fixing member can further include a second bent edge connected to the support plate on a side away from the first bent edge, and the second bent edge is in contact with at least part of the windward surface of the first heat exchanger, at least part of the windward surface of the first heat exchanger constituting at least part of the second mounting portion.

[0020] In this way, the first heat exchanger can be prevented from sliding on the support surface, so that the first heat exchanger is prevented from deviating during operation.

[0021] In some embodiments, a receiving cavity is further formed in the housing, and the direct expansion unit can further include a second partition plate for separating the receiving cavity from the air outlet passage. The direct expansion unit can further include a compressor and a second heat exchanger, the compressor being arranged in the receiving cavity, and the second heat exchanger being arranged in the receiving cavity, and the second heat exchanger, the compressor and the first heat exchanger being connected by a refrigerant circulation pipeline to form a refrigerant circulation loop. The second partition plate is provided with an opening, and the refrigerant circulation pipeline connects the first heat exchanger and the second heat exchanger through the opening, and / or the refrigerant circulation pipeline connects the first heat exchanger and the compressor through the opening.

[0022] In this way, the layout of the refrigerant circulation pipeline can be simplified, so that the refrigerant circulation pipeline can be directly connected between the air outlet passage and the receiving cavity through the opening, thereby shortening the length of the refrigerant circulation pipeline, and further reducing the energy loss of the refrigerant during circulation.

[0023] In some embodiments, the direct expansion unit can further include a solenoid valve arranged on the refrigerant circulation pipeline, and the solenoid valve is located on the windward side of the first heat exchanger.

[0024] In this way, since the windward side of the first heat exchanger is for unheated air and the leeward side of the first heat exchanger is for heated air, the solenoid valve is arranged on the windward side of the first heat exchanger, so that the opening on the leeward side of the first heat exchanger is prevented, thereby preventing the unheated air from entering the leeward side of the first heat exchanger from the receiving cavity, and further reducing the heat exchange efficiency.

[0025] This application embodiment also provides a direct expansion unit, which may include a shell, a water receiving pan and a first heat exchanger. The water receiving pan is disposed inside the shell, and the first heat exchanger is disposed on the water receiving pan. The angle between the plane of the first heat exchanger and the plane of the water receiving pan is greater than 0° and less than 90°.

[0026] In this way, the angle between the plane where the first heat exchanger is located and the plane where the water receiving pan is located is greater than 0° and less than 90°. That is, the first heat exchanger is inclined on the water receiving pan. This allows the first heat exchanger to be installed more compactly above the water receiving pan, thereby improving space utilization and saving installation space for the direct expansion unit. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is one of the structural schematic diagrams of a direct expansion unit provided in this application;

[0029] Figure 2 for Figure 1 The second schematic diagram of the direct expansion unit shown;

[0030] Figure 3 for Figure 1 The third schematic diagram of the direct expansion unit shown;

[0031] Figure 4 for Figure 1 The fourth schematic diagram of the direct expansion unit is shown.

[0032] Figure 5 for Figure 1 The fifth schematic diagram of the direct expansion unit is shown.

[0033] Figure 6 This is a schematic diagram of the structure of a frame provided in an embodiment of this application;

[0034] Figure 7 for Figure 1 The diagram shown is the sixth one of the structural schematic diagrams of the direct expansion unit;

[0035] Figure 8 for Figure 1 The diagram shown is the seventh one of the structural schematic diagrams of the direct expansion unit;

[0036] Figure 9 for Figure 1 The diagram shown is the eighth one of the structural schematic diagrams of the direct expansion unit;

[0037] Figure 10 Fig. 9 is a partial enlarged view of the direct expansion unit shown in Fig. 1 at A; Figure 9

[0038] Figure 11 Fig. 9 is a partial enlarged view of the direct expansion unit shown in Fig. 1 at A; Figure 1

[0039] Figure 12 Fig. 9 is a partial enlarged view of the direct expansion unit shown in Fig. 1 at A; Figure 1

[0040] Figure 13 Fig. 9 is a partial enlarged view of the direct expansion unit shown in Fig. 1 at A; Figure 1

[0041] Figure 14 Fig. 9 is a partial enlarged view of the direct expansion unit shown in Fig. 1 at A; Figure 1

[0042] Figure 15 Fig. 9 is a partial enlarged view of the direct expansion unit shown in Fig. 1 at A; Figure 1

[0043] Figure 16 Fig. 9 is a partial enlarged view of the direct expansion unit shown in Fig. 1 at A; Figure 1

[0044] Figure 17 Fig. 9 is a partial enlarged view of the direct expansion unit shown in Fig. 1 at A; Figure 16

[0045] Figure 18 Fig. 9 is a partial enlarged view of the direct expansion unit shown in Fig. 1 at A; Figure 1

[0046] Figure 19 Fig. 9 is a partial enlarged view of the direct expansion unit shown in Fig. 1 at A; Figure 1

[0047] Figure 20 Fig. 9 is a partial enlarged view of the direct expansion unit shown in Fig. 1 at A; Figure 1

[0048] Reference numeral: 100, direct expansion unit;

[0049] ​​​​​​​​​​​10, housing; 101, air inlet; 102, air outlet; 11, containing space; 111, air outlet channel; 111A, first air outlet channel; 111B, second air outlet channel; 112, containing cavity; 12, frame; 121, first upright column; 1211, first column body; 1212, second column body; 1213, third column body; 122, second upright column; 123, third upright column; 13, panel; 13A, first panel; 13B, second panel; 131, first plate body; 1311, first sub-plate body; 1312, second sub-plate body; 132, second plate body; 133, third plate body; 1331, third sub-plate body; 1332, fourth sub-plate body; 134, fourth plate body; 1341, fifth sub-plate body; 1342, sixth sub-plate body; 135, fifth plate body; 1351, seventh sub-plate body; 1352, eighth sub-plate body; 14, first reinforcing beam; 15, second reinforcing beam; 16, third reinforcing beam; 17, fourth reinforcing beam; 20, refrigerant circulation system; 21, fan; 22, first heat exchanger; 221, first mounting portion; 222, second mounting portion; 30, first partition plate; 301, outlet; 40, support; 40A, support column; 41, first support column; 42, second support column; 43, third support column; 50, water pan; 501, drain hole; 51, water pan body; 52, extension plate; 60, height increasing piece; 601, height increasing beam; 602, height increasing column; 61, first height increasing piece; 62, second height increasing piece; 70, first fixing piece; 71, first connecting plate; 72, second connecting plate; 73, fixing strip; 80, second fixing piece; 81, first bent edge; 82, support plate; 83, second bent edge; 90, second partition plate; 901, opening; 91, whole machine base; 911, base body; 9111, channel steel strip; 912, protruding connecting portion; 92, compressor base; 921, seat body; 922, compressor water pan; 93, second heat exchanger base. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0051] In the description of the utility model, it is necessary to understand that the orientation or relative position relation indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer" and the like is based on the orientation or relative position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. Unless otherwise specified, the above orientation description can be flexibly set in the actual application process under the condition of meeting the relative position relation shown in the drawings.

[0052] The terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implying the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0053] In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "communication" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. It can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0054] In the embodiments of the utility model, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, article or device. Without more limitation, the element defined by the sentence "including a" does not exclude the presence of another identical element in the process, article or device including the element.

[0055] In the embodiments of the utility model, the words such as "exemplary" or "for example" are used to represent as an example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the utility model should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the words such as "exemplary" or "for example" are intended to present the relevant concept in a specific way.

[0056] With the development of global economy and the acceleration of urbanization process, people's requirements for living and working environment are constantly improving. As an important device for adjusting indoor environment, air conditioning technology is constantly developing and innovating with the increasing demand.

[0057] The direct expansion unit as a form of air conditioning products is characterized in that the unit itself is provided with a compressor, and the liquid refrigerant in the refrigeration system is directly evaporated in the evaporator (i.e. direct expansion), thereby realizing heat absorption and refrigeration of air outside the evaporator. This direct expansion refrigeration method can reduce energy loss in the transmission process, has high heat exchange efficiency, and does not require cooling water and cooling water system, and is convenient to install.

[0058] Since the direct expansion unit is usually arranged in a specific machine room, however, the volume of the direct expansion unit is usually large, and the space of the machine room is limited, which may result in insufficient installation space.

[0059] Based on this, the embodiments of the present application provide a direct expansion unit, by placing the first heat exchanger obliquely, the first heat exchanger can be more compactly arranged above the water pan, thereby improving the space utilization and saving the installation space of the direct expansion unit.

[0060] Please refer to Figure 1 , Figure 1 A structure diagram of a direct expansion unit 100 provided by the present application, the direct expansion unit 100 can include a shell 10 and a refrigerant circulation system 20, the shell 10 forms an accommodation space 11 inside, and the refrigerant circulation system 20 is arranged in the accommodation space 11 inside the shell 10.

[0061] The refrigerant circulation system 20 is used for refrigeration or heating, since the refrigerant circulation system 20 is arranged in the accommodation space 11 inside the shell 10, it can effectively prevent the heat from spreading to the outside during the transmission process, thereby reducing energy loss and improving the energy efficiency of the direct expansion unit 100.

[0062] In some embodiments of the present application, the shell 10 can include a frame 12 and a panel 13, the panel 13 can be multiple, and the multiple panels 13 are connected with the frame 12 to form the accommodation space 11. In this way, the shell 10 adopts the structure that multiple panels 13 are connected with the frame 12, and the frame 12 is used to fix and support the panel 13, which can enhance the stability of the shell 10.

[0063] In some embodiments, the panel 13 can include an inner plate, an outer plate and a filling layer, the inner plate and the outer plate are arranged at intervals, and the filling layer is arranged between the inner plate and the outer plate to achieve heat preservation and insulation between the inner plate and the outer plate. For example, the filling layer can be formed by foaming, the inner plate and the outer plate are separated by the expansion of the foaming material, which can reduce the heat transfer between the inner plate and the outer plate, thereby reducing energy loss and improving the energy efficiency of the direct expansion unit 100.

[0064] Please refer to Figure 1 and Figure 2 , Figure 2 for Figure 1 The second schematic diagram of the direct expansion unit 100 shown illustrates that, in some embodiments, the accommodating space 11 may include an air outlet duct 111 and an accommodating cavity 112, which are spaced apart. A portion of the refrigerant circulation system 20 is disposed within the air outlet duct 111, and another portion of the refrigerant circulation system 20 is disposed within the accommodating cavity 112. The panel 13 includes a first panel 13A and a second panel 13B, both of which are connected to the frame 12. Multiple first panels 13A surround to form the air outlet duct 111, and multiple second panels 13B surround to form the accommodating cavity 112.

[0065] Thus, the air outlet duct 111 and the receiving cavity 112 can be used to accommodate parts of the refrigerant circulation system 20, which can realize functional zoning. When the direct expansion unit 100 fails, it can be repaired by zone, making operation more convenient.

[0066] Please refer to Figure 3 , Figure 3 for Figure 1 The third schematic diagram of the direct expansion unit 100 shown in this application indicates that, in some embodiments of the present application, the housing 10 may also be provided with an air inlet 101 and an air outlet 102, both of which are connected to the air outlet channel 111. This allows air to enter the air outlet channel 111 from the air inlet 101 and flow out from the air outlet 102.

[0067] Please refer to Figure 4 , Figure 4 for Figure 1 The fourth schematic diagram of the direct expansion unit 100 shown in this application indicates that, in some embodiments of this application, the direct expansion unit 100 may further include a first partition 30, on which an outlet 301 is formed, and the outlet 301 is disposed on the air outlet duct 111.

[0068] The refrigerant circulation system 20 may include a fan 21 connected to the first partition 30, which is used to make airflow flow along the air outlet duct 111.

[0069] In some embodiments of this application, at least a portion of the first partition 30 is disposed within the housing 10, and the fan 21 is disposed on the first partition 30 and located at the outlet 301. Thus, the fan 21 can cause airflow to flow through the outlet 301 along the air outlet channel 111.

[0070] The refrigerant circulation system 20 can further include a first heat exchanger 22, at least a portion of the first heat exchanger 22 being arranged in the air outlet channel 111 and connected to the first partition 30. The first heat exchanger 22 can be an evaporator. The refrigerant in the evaporator absorbs heat when evaporated, and the air flowing through the evaporator can exchange heat with the refrigerant, so that the temperature of the air is lowered, and refrigeration is achieved.

[0071] During operation of the fan 21, vibration can be generated due to imbalance of the blades or the impeller, poor lubrication of the bearings, or unstable air flow. Since the fan 21 and the first heat exchanger 22 are both connected to the first partition 30, the vibration of the fan 21 can be transmitted to the first partition 30, and then transmitted to the first heat exchanger 22 through the first partition 30, so that the first heat exchanger 22 can be vibrated and dislocated.

[0072] In order to prevent the vibration of the fan 21 from damaging the first heat exchanger 22, in some embodiments, the direct expansion unit 100 further includes a shock insulation layer. The shock insulation layer can be arranged between the first heat exchanger 22 and the first partition 30. In this way, the shock insulation layer can isolate the hard connection between the first heat exchanger 22 and the first partition 30, so as to prevent the vibration from being transmitted to the first heat exchanger 22 through the first partition 30 and damaging the first heat exchanger 22.

[0073] The shock insulation layer can also be arranged between the first partition 30 and the fan 21. In this way, the shock insulation layer can isolate the hard connection between the first partition 30 and the fan 21, so as to prevent the vibration from being transmitted to the first partition 30 through the fan 21, and then prevent the vibration from being transmitted to the first heat exchanger 22 through the first partition 30 and damaging the first heat exchanger 22.

[0074] In some embodiments of the present application, the material of the shock insulation layer can be an elastic material. When the elastic material is subjected to vibration, it can be elastically deformed, so as to absorb and consume the energy of the vibration, and then reduce the transmission of the vibration between the fan 21 and the first partition 30, or between the first partition 30 and the first heat exchanger 22.

[0075] Optionally, the shock insulation layer can be thermal insulation cotton. In this way, the transmission of the vibration between the fan 21 and the first partition 30, or between the first partition 30 and the first heat exchanger 22 can be reduced, and the thermal insulation effect can also be achieved, so as to reduce the heat loss of the air during the flow.

[0076] Optionally, the shock insulation layer can also be rubber, sponge or elastic plastic, which can achieve soft connection between the fan 21 and the first partition 30, or between the first partition 30 and the first heat exchanger 22, and the present application does not make further limitation in this regard.

[0077] Please refer to Figure 3 and Figure 4The first heat exchanger 22 is arranged on the side of the first partition 30 away from the fan 21, and the first heat exchanger 22 and the fan 21 are arranged in the vertical direction. In this way, air can enter the air outlet passage 111 from the air inlet 101, pass through the first heat exchanger 22 for heat exchange, and then enter the fan 21 through the outlet 301 on the first partition 30 and be discharged to the indoor space.

[0078] Since the first heat exchanger 22 and the fan 21 are arranged in the vertical direction, the heat-exchanged air can flow in the vertical direction, preventing energy loss caused by airflow turning. At the same time, the vertical arrangement of the two can effectively reduce the required floor area of the gas flow passage, thereby effectively saving the floor area in the machine room.

[0079] Please refer to Figure 5 , Figure 5 for Figure 1 the fifth structural schematic diagram of the direct expansion unit 100, in some embodiments of the present application, the direct expansion unit 100 can further include a support 40 connected between the first partition 30 and the frame 12, for supporting the first partition 30. In this way, the support 40 can support the first partition 30 and thus support the fan 21, and leave installation space for the first heat exchanger 22.

[0080] Please refer to Figure 6 , Figure 6 for the structural schematic diagram of the frame 12 provided in the embodiments of the present application, in some embodiments of the present application, the frame 12 includes a first column 121, a second column 122 and a third column 123, the first column 121 extends in a first direction, the second column 122 extends in a second direction, and the third column 123 extends in a third direction, and the first column 121, the second column 122 and the third column 123 are connected.

[0081] The first column 121, the second column 122 and the third column 123 extend in different directions respectively, which can form a stable support structure to support pressure from different directions, thereby enhancing the stability of the frame.

[0082] In some embodiments, the first direction can be the vertical direction, and the first column 121, the second column 122 and the third column 123 are perpendicular to each other. In this way, a cuboid frame can be formed, thereby making the space utilization reasonable and facilitating installation.

[0083] Please refer to Figure 7 , Figure 8 , Figure 9 and Figure 10 , Figure 7 for the sixth structural schematic diagram of the direct expansion unit 100, Figure 1 Figure 8 Figure 1 ​​A seventh structural schematic diagram of the direct expansion unit 100 shown, Figure 9 A seventh structural schematic diagram of the direct expansion unit 100 shown, Figure 1 A seventh structural schematic diagram of the direct expansion unit 100 shown, Figure 10 A seventh structural schematic diagram of the direct expansion unit 100 shown, Figure 9 A seventh structural schematic diagram of the direct expansion unit 100 shown, in some embodiments of the present application, the support 40 can include support columns 40A, which can include a first support column 41, a second support column 42, and a third support column 43, the first support column 41, the second support column 42, and the third support column 43 are arranged in a triangle in the horizontal direction, and the first support column 41, the second support column 42, and the third support column 43 are connected between the first partition 30 and the frame 12.

[0084] In this way, the first support column 41, the second support column 42, and the third support column 43 can be used to support the first partition 30, and since the first support column 41, the second support column 42, and the third support column 43 are arranged in a triangle in the horizontal direction, three support points of the first partition 30 that are not located on the same straight line can be formed, making the support more stable.

[0085] In one possible structural design, the first support column 41, the second support column 42, and the third support column 43 can be arranged around the first heat exchanger 22.

[0086] In another possible structural design, the first support column 41, the second support column 42, and the third support column 43 can be arranged around the fan 21.

[0087] In some embodiments of the present application, the frame 12 includes a first column 1211, a second column 1212, and a third column 1213, which all extend in the vertical direction, wherein the first column 1211 is connected to the first support column 41, the second column 1212 is connected to the second support column 42, and the third column 1213 is connected to the third support column 43.

[0088] In this way, the pressure borne by the first support column 41, the second support column 42, and the third support column 43 can be transmitted to the first column 1211, the second column 1212, and the third column 1213, thereby dispersing the force to the frame 12, so that the load-bearing capacity of the support 40 can be increased.

[0089] In some embodiments of the present application, the first column 1211 is arranged on the outer side of the first support column 41 and is attached to the first support column 41; the second column 1212 is arranged on the outer side of the second support column 42 and is attached to the second support column 42; and the third column 1213 is arranged on the outer side of the third support column 43 and is attached to the third support column 43.

[0090] In this way, the contact surface of the first support column 41 and the first column body 1211, the contact surface of the second support column 42 and the second column body 1212, and the contact surface of the third support column 43 and the third column body 1213 can be larger, so that the frame body is more uniform in stress, and the carrying capacity of the support 40 is further improved.

[0091] In some embodiments of the present application, the first support column 41 is provided with a positioning hole, and after the first support column 41 is attached to the first column body 1211, the first support column 41 is fixedly connected to the first column body 1211 by a self-tapping screw at the positioning hole.

[0092] In this way, the connection between the first support column 41 and the first column body 1211 can be more stable, and shaking due to vibration of the fan 21 during movement can be prevented.

[0093] In addition, using a self-tapping screw connection, the screw can be directly screwed into the first column body 1211 without pre-punching the first column body 1211, forming a firm connection. In this way, installation can be more convenient, thereby reducing installation time and cost.

[0094] In some embodiments of the present application, the fan 21 can be an electrical commutation fan (EC fan). The EC fan is a permanent magnet synchronous motor fan driven by an electronic commutation technology. It uses a digital brushless direct current outer rotor motor as a power source, and controls the motor accurately through an electronic control unit to achieve speed regulation and air volume control.

[0095] Due to the small size and light weight of the EC fan, it can adapt to various compact installation environments, thereby reducing the size of the direct expansion unit 100 and saving space.

[0096] Please refer to Figure 11 and Figure 12 , Figure 11 for Figure 1 the ninth structure diagram of the direct expansion unit 100, Figure 12 for Figure 1 the tenth structure diagram of the direct expansion unit 100. Since the direct expansion unit 100 usually needs to be installed in a specific machine room, the space in the machine room is limited. In order to save the installation space of the direct expansion unit 100, in some embodiments of the present application, the direct expansion unit 100 can further include a water pan 50, the water pan 50 is arranged in the shell 10, the first heat exchanger 22 is arranged on the water pan 50, and the angle between the plane where the first heat exchanger 22 is located and the plane where the water pan 50 is located is greater than 0° and less than 90°.

[0097] Since the first heat exchanger 22 is in operation in the refrigeration mode, water vapor contained in the air will condense into water under the action of heat absorption of the refrigerant. Therefore, the first heat exchanger 22 is arranged on the water pan 50, so that the condensed water can flow into the water pan 50. The angle between the plane where the first heat exchanger 22 is located and the plane where the water pan 50 is located is greater than 0° and less than 90°, that is, the first heat exchanger 22 is arranged on the water pan 50 in an inclined manner, so that the first heat exchanger 22 can smoothly flow into the water pan 50, preventing the condensed water from accumulating on the surface of the first heat exchanger 22 and causing corrosion of the first heat exchanger 22.

[0098] At the same time, since the first heat exchanger 22 is arranged on the water pan 50 in an inclined manner, the first heat exchanger 22 can be more compactly arranged above the water pan 50, thereby improving the space utilization and saving the volume of the direct expansion unit 100.

[0099] Specifically, in some embodiments, at least part of the first heat exchanger 22 is located between the air inlet 101 and the air outlet 102, and the angle between the windward surface of the first heat exchanger 22 and the plane where the water pan 50 is located is greater than 0° and less than 90°.

[0100] In this way, the first heat exchanger 22 can divide the air outlet channel 111 into a first air outlet channel 111A and a second air outlet channel 111B. The first air outlet channel 111A is located on the air inlet side of the first heat exchanger 22, and the second air outlet channel 111B is located on the air outlet side of the first heat exchanger 22. Since the angle between the windward surface of the first heat exchanger 22 and the plane where the water pan 50 is located is greater than 0° and less than 90°, at least part of the first air outlet channel 111A and at least part of the second air outlet channel 111B can be located at the same horizontal height, thereby reducing the space layout requirement of the air outlet channel 111 in the height direction, and further reducing the height of the direct expansion unit 100 and saving the space occupied by the unit.

[0101] In addition, the angle between the windward surface of the first heat exchanger 22 and the plane where the water pan 50 is located is greater than 0° and less than 90°, which can increase the windward area of the first heat exchanger 22, thereby improving the heat exchange efficiency of the first heat exchanger 22.

[0102] In some embodiments, the water pan 50 is provided with a drain hole 501, and a condensed water pipe of the water pan 50 is connected to the drain hole 501, which can be used to drain the condensed water in the water pan 50.

[0103] In some embodiments, the outer wall of the water pan 50 can be provided with thermal insulation cotton, which can ensure that no condensed water condenses on the outer wall of the water pan 50, thereby preventing damage to other components in the unit caused by the condensed water.

[0104] In some embodiments of this application, the direct expansion unit 100 may further include a heightening member 60, which is disposed on the water receiving pan 50. The first heat exchanger 22 may include a first mounting part 221 and a second mounting part 222, which are disposed opposite to each other. The first mounting part 221 is connected to or abuts against the end of the heightening member 60 away from the water receiving pan 50, and the second mounting part 222 is connected to or abuts against the water receiving pan 50.

[0105] The first heat exchanger 22 is connected to or abuts against both the riser 60 and the water receiving pan 50, so that the first heat exchanger 22 is inclined on the water receiving pan 50. In this way, multiple stress points can be formed on the first heat exchanger 22, thereby making the connection of the first heat exchanger 22 more stable and enhancing the stability of the direct expansion unit 100.

[0106] In some embodiments of this application, at least a portion of the windward side of the first heat exchanger 22 may constitute a first mounting portion 221, and at least a portion of the sidewall of the first heat exchanger 22 away from the first mounting portion 221 and at least a portion of the windward side may constitute a second mounting portion 222.

[0107] In this way, the first heat exchanger 22 can be connected or abutted to the elevating member 60 and the water receiving tray 50 without the need for a separate mechanism, further improving the space utilization rate.

[0108] Please refer to Figure 13 and Figure 14 , Figure 13 for Figure 1 The diagram shown is the eleventh in the series of structural schematic diagrams of the direct expansion unit 100. Figure 14 for Figure 1 The schematic diagram of the direct expansion unit 100 shown in Figure 12 illustrates that, in some embodiments of this application, the raising member 60 may include a first raising member 61 and a second raising member 62, which are spaced apart on the water receiving tray 50. The direct expansion unit 100 may also include a first fixing member 70, which is connected to the ends of the first raising member 61 and the second raising member 62 away from the water receiving tray 50, and at least a portion of the first fixing member 70 contacts the surface of the first mounting portion 221.

[0109] Thus, both the first raising member 61 and the second raising member 62 can form a fulcrum for the first heat exchanger 22, thereby increasing the stability of the first heat exchanger 22. Since the first fixing member 70 is connected to the end of the first raising member 61 and the second raising member 62 away from the water receiving pan 50, and at least a part of the first fixing member 70 is in contact with the surface of the first mounting part 221, the first fixing member 70 can be connected between the first raising member 61 and the second raising member 62 and the first mounting part 221, and can increase the support area of ​​the first mounting part 221, thereby further increasing the stability of the first heat exchanger 22.

[0110] In a possible structural design, at least part of the first fixing member 70 can be a first fixing strip, which is in surface contact with the first mounting portion 221.

[0111] In another possible structural design, at least part of the first fixing member 70 can be a first fixing plate, which is in surface contact with the first mounting portion 221.

[0112] In some embodiments, the first and second heightening members 61 and 62 can each include a heightening beam 601 arranged in the water pan 50 and a heightening column 602, one end of which is connected to the heightening beam 601 and the other end of which is connected to the first fixing member 70. For example, the heightening beam 601 can be fixedly connected to the water pan 50 by welding.

[0113] In this way, the contact area between the first and second heightening members 61 and 62 and the water pan 50 can be increased, so that the first and second heightening members 61 and 62 are more stable.

[0114] Please refer to Figure 13 and Figure 15 , Figure 15 for Figure 1 the structural schematic diagram of the direct expansion unit 100 shown in FIG. 13. In some embodiments of the present application, the first fixing member 70 can include a first connecting plate 71, a second connecting plate 72 and a fixing strip 73, the first connecting plate 71 being connected to the first heightening member 61, the second connecting plate 72 being connected to the second heightening member 62, the fixing strip 73 extending along the arrangement direction of the first and second heightening members 61 and 62, the fixing strip 73 being connected to the first and second connecting plates 71 and 72 and being in surface contact with the first mounting portion 221.

[0115] In this way, the contact area between the first fixing member 70 and the first and second heightening members 61 and 62 can be increased, so that the connection of the first fixing member 70 is more stable, and the stability of the first heat exchanger 22 is further enhanced.

[0116] In some embodiments, the first and second connecting plates 71 and 72 can be connected to the first and second heightening members 61 and 62 by screws. In this way, the connection is more stable, and the stability of the first heat exchanger 22 is further enhanced.

[0117] In a possible structural design, the arrangement direction of the first and second heightening members 61 and 62 is perpendicular to the arrangement direction of the first and second mounting portions 221 and 222. In another possible structural design, the arrangement direction of the first and second heightening members 61 and 62 is parallel to the arrangement direction of the first and second mounting portions 221 and 222.

[0118] Please refer to Figure 12 , Figure 13 , Figure 16 and Figure 17 , Figure 16 Fig. 14 is a structural schematic view of the direct expansion unit 100 according to some embodiments of the present application, Figure 1 Fig. 15 is a partial enlarged view of the direct expansion unit 100 at B according to some embodiments of the present application. The direct expansion unit 100 can further include a second fixing member 80 connected with the water pan 50, and at least a part of the second fixing member 80 is in surface contact with the second mounting portion 222. Figure 17 Figure 16 In this way, the second fixing member 80 is connected between the water pan 50 and the second mounting portion 222, and the support area of the second mounting portion 222 is increased, thereby enhancing the stability of the first heat exchanger 22.

[0119] In some embodiments of the present application, the second fixing member 80 can include a first bent edge 81 connected with the water pan 50, and a support plate 82 connected with the first bent edge 81, and the support plate 82 is in surface contact with the side wall of the first heat exchanger 22.

[0120] In this way, the second fixing member 80 can abut against the first heat exchanger 22, so that the second mounting portion 222 is connected or abuts with the water pan 50. Since the support plate 82 is in surface contact with the side wall of the first heat exchanger 22, the contact area between the second fixing member 80 and the first heat exchanger 22 is increased, thereby making the installation of the first heat exchanger 22 more stable.

[0121] It can be understood that when the arrangement direction of the first and second heightening members 61 and 62 is perpendicular to the arrangement direction of the first and second mounting portions 221 and 222, the extension direction of the support plate 82 is perpendicular to the arrangement direction of the first and second heightening members 61 and 62. When the arrangement direction of the first and second heightening members 61 and 62 is parallel to the arrangement direction of the first and second mounting portions 221 and 222, the extension direction of the support plate 82 is parallel to the arrangement direction of the first and second heightening members 61 and 62.

[0122] It can be understood that when the arrangement direction of the first and second heightening members 61 and 62 is perpendicular to the arrangement direction of the first and second mounting portions 221 and 222, the extension direction of the support plate 82 is perpendicular to the arrangement direction of the first and second heightening members 61 and 62. When the arrangement direction of the first and second heightening members 61 and 62 is parallel to the arrangement direction of the first and second mounting portions 221 and 222, the extension direction of the support plate 82 is parallel to the arrangement direction of the first and second heightening members 61 and 62.

[0123] ​In some embodiments of the present application, the second fixing member 80 can further comprise a second bent edge 83 connected to a side of the support plate 82 away from the first bent edge 81, and the second bent edge 83 is in contact with at least part of the windward surface of the first heat exchanger 22.

[0124] In this way, the first heat exchanger 22 can be prevented from sliding on the support plate 82, thereby preventing the first heat exchanger 22 from deviating during operation.

[0125] In some embodiments of the present application, the water pan 50 can further comprise a water pan body 51 and an extension plate 52 connected between the water pan body 51 and the first bent edge 81, so that the extension plate 52 can facilitate the connection between the water pan body 51 and the first bent edge 81, preventing the water pan body 51 from leaking due to the direct connection between the first bent edge 81 and the water pan body 51.

[0126] In some embodiments, the first bent edge 81 can be connected to the extension plate 52 by screws, so that the connection between the two can be more stable.

[0127] In some embodiments of the present application, the projection of the second fixing member 80 and / or the first heat exchanger 22 on the plane of the water pan 50 is located within the water pan 50.

[0128] The projection of the second fixing member 80 on the plane of the water pan 50 is located within the water pan 50, which can reduce the spatial layout requirements of the second fixing member 80 in the horizontal direction, and the projection of the first heat exchanger 22 on the plane of the water pan 50 is located within the water pan 50, which can prevent the condensed water on the first heat exchanger 22 from flowing to the outside of the water pan 50.

[0129] Please refer to Figure 1 , Figure 2 and Figure 13 In some embodiments of the present application, the direct expansion unit 100 can further comprise a second partition 90 for separating the air outlet channel 111 from the containing cavity 112, which can reduce the interference between the air outlet channel 111 and the containing cavity 112, and improve the operating efficiency of the overall system.

[0130] In some embodiments of the present application, the refrigerant circulation system 20 can further comprise a compressor and a second heat exchanger, and the compressor, the second heat exchanger and the first heat exchanger 22 are connected by a refrigerant circulation pipeline to form a refrigerant circulation loop. The refrigerant circulation pipeline can comprise a gas pipeline and a liquid pipeline, both of which are used for the flow of refrigerant.

[0131] To ensure the refrigerant circulation pipeline is connected, the second partition 90 is provided with an opening 901. The refrigerant circulation pipeline connects the first heat exchanger 22 to the second heat exchanger through the opening 901, and / or the refrigerant circulation pipeline connects the first heat exchanger 22 to the compressor through the opening 901.

[0132] This simplifies the layout of the refrigerant circulation pipeline, allowing the refrigerant circulation pipeline to be directly connected between the air outlet duct 111 and the receiving cavity 112 through the opening 901, thereby shortening the length of the refrigerant circulation pipeline and reducing the energy loss of the refrigerant during the circulation process.

[0133] In some embodiments, the water receiving tray 50 may be connected to the second partition 90. The water receiving tray 50 may also include a foot connected to the outer wall of the water receiving tray 50 and may be fixedly connected to the second partition, thereby fixing the water receiving tray 50 and preventing the water receiving tray 50 from shaking or shifting during the operation of the direct expansion unit 100.

[0134] In some embodiments of this application, the refrigerant circulation system 20 may further include a solenoid valve 23, which is disposed on the refrigerant circulation pipeline for controlling the refrigerant circulation pipeline. The solenoid valve 23, the gas pipeline, and the liquid pipeline are all disposed on the windward side of the first heat exchanger 22.

[0135] In this way, since the air on the windward side of the first heat exchanger 22 is unheated air and the air on the leeward side of the first heat exchanger 22 is heat-exchanged air, if the solenoid valve 23, the gas pipeline and the liquid pipeline are all located on the leeward side of the first heat exchanger 22, the refrigerant in the gas pipeline and the liquid pipeline will exchange heat with the heat-exchanged air again, thereby reducing the heat exchange efficiency of the unit.

[0136] In addition, the solenoid valve 23, the gas pipeline and the liquid pipeline are all located on the windward side of the first heat exchanger 22, which can prevent the opening on the leeward side of the first heat exchanger 22 from causing unheated air to enter the leeward side of the first heat exchanger 22 through the receiving cavity 112 and undergo heat exchange, thereby reducing the cooling or heating intensity of the unit.

[0137] Please refer to Figure 1 to Figure 19 , Figure 18 for Figure 1 The schematic diagram of the direct expansion unit 100 shown is number fifteen. Figure 19 for Figure 1 The sixteenth schematic diagram of the direct expansion unit 100 shown shows that, since internal maintenance is required during the use of the direct expansion unit 100, in some embodiments of this application, at least one of the plurality of panels 13 of the housing 10 is detachably connected to the frame 12.

[0138] In this way, the panel 13 can be disassembled, and the refrigerant circulation system 20 facing the panel 13 can be maintained, and the disassembly of the panel 13 can increase the convenience of the maintenance of the direct expansion unit 100.

[0139] In some embodiments of the present application, the plurality of first panels 13A surround the air outlet channel 111, at least one of the plurality of first panels 13A is detachably connected to the frame 12, and the plurality of second panels 13B surround the accommodation cavity 112, at least one of the plurality of second panels 13B is detachably connected to the frame 12.

[0140] In this way, when the first panel 13A is disassembled, the part of the refrigerant circulation system 20 arranged in the air outlet channel 111 can be maintained, and when the second panel 13B is disassembled, the part of the refrigerant circulation system 20 arranged in the accommodation cavity 112 can be maintained, and the divided maintenance can make the maintenance of the direct expansion unit 100 more convenient.

[0141] In some embodiments of the present application, the fan 21 is arranged in the air outlet channel 111, and the first panel 13A can include a first panel body 131, at least part of the first panel body 131 is arranged towards the fan 21, and the first panel body 131 is detachably connected to the frame 12. In this way, when the first panel body 131 is disassembled, the fan 21 can be maintained.

[0142] However, if the whole first panel body 131 is disassembled to maintain the fan 21, the structure around the original first panel body 131 is only supported by the frame 12, which may cause the deformation of the frame 12 due to uneven stress.

[0143] Therefore, in some embodiments of the present application, the first panel body 131 can include a first sub-panel body 1311 and a second sub-panel body 1312, the first sub-panel body 1311 is arranged towards the fan 21, and the first sub-panel body 1311 is detachably connected to the frame 12, the second sub-panel body 1312 is in the same plane as the first sub-panel body 1311, and the second sub-panel body 1312 is fixedly connected to the frame 12. The direct expansion unit 100 can further include a first reinforcing beam 14, the first reinforcing beam 14 is arranged between the first sub-panel body 1311 and the second sub-panel body 1312, and the first reinforcing beam 14 is connected to the frame 12.

[0144] In this way, when the fan 21 is maintained, only the first sub-panel body 1311 needs to be disassembled, and the second sub-panel body 1312 remains connected to the frame 12, so that the second sub-panel body 1312 can disperse the force borne by the frame 12, thereby making the structure more stable. In addition, the first reinforcing beam 14 arranged between the first sub-panel body 1311 and the second sub-panel body 1312 and connected to the frame 12 can also be used to disperse the force borne by the frame 12, further enhancing the stability of the frame 12.

[0145] In a possible structural design, the first sub-plate body 1311 and the second sub-plate body 1312 can be arranged in a vertical direction, and the first sub-plate body 1311 is located above the second sub-plate body 1312. In another possible structural design, the first sub-plate body 1311 and the second sub-plate body 1312 can be at the same height in a horizontal direction.

[0146] In some embodiments, the first panel 13A can further include a second plate body 132, and the second plate body 132 is provided with an air inlet 101, which is arranged towards the first heat exchanger 22. In this way, the first heat exchanger 22 can be maintained through the air inlet 101.

[0147] In some embodiments, the fan 21 is located above the first heat exchanger 22, and the first sub-plate body 1311 is located above the second sub-plate body 1312. Therefore, the second sub-plate body 1312 can be arranged towards the first heat exchanger 22.

[0148] In some embodiments of the present application, the second panel 13B can include a third plate body 133, a fourth plate body 134, and a fifth plate body 135. In some embodiments, the refrigerant circulation system 20 can further include a compressor, the compressor is arranged in the accommodation cavity 112, at least one of the plurality of second panels 13B is arranged towards the compressor and detachably connected with the frame 12, that is, the third plate body 133 is arranged towards the compressor and detachably connected with the frame 12. In this way, when the third plate body 133 is detached, the compressor can be maintained.

[0149] In some embodiments, the refrigerant circulation system 20 can further include a second heat exchanger, the second heat exchanger is arranged in the accommodation cavity 112, at least one of the plurality of second panels 13B is arranged towards the second heat exchanger and detachably connected with the frame 12, that is, the fourth plate body 134 is arranged towards the second heat exchanger and detachably connected with the frame 12. In this way, when the fourth plate body 134 is detached, the second heat exchanger can be maintained.

[0150] In some embodiments of the present application, the refrigerant circulation system 20 can further include a valve, a gas pipe and a liquid pipe, at least part of the valve, the gas pipe and the liquid pipe are arranged in the accommodation cavity 112, at least one of the plurality of second panels 13B is arranged towards the valve, the gas pipe and the liquid pipe and detachably connected with the frame 12, that is, the fifth plate body 135 is arranged towards the valve, the gas pipe and the liquid pipe and detachably connected with the frame 12. In this way, when the fifth plate body 135 is detached, the valve, the gas pipe and the liquid pipe can be maintained.

[0151] In some embodiments, the third plate body 133 can include a third sub-plate body 1331 and a fourth sub-plate body 1332, a second reinforcing beam 15 can be arranged between the third sub-plate body 1331 and the fourth sub-plate body 1332, the third sub-plate body 1331 is detachably connected to the frame body 12, the fourth sub-plate body 1332 is fixedly connected to the frame body 12, and the second reinforcing beam 15 is also connected to the frame body 12. In this way, when the third sub-plate body 1331 is detached, the compressor can be overhauled, and the fourth sub-plate body 1332 and the second reinforcing beam 15 are used to enhance the stability of the frame body 12.

[0152] In some embodiments, the fourth sub-plate body 1332 and the second reinforcing beam 15 can each be provided as two, connected to opposite sides of the third sub-plate body 1331 respectively, so that the stability of the frame body 12 can be further enhanced.

[0153] In some embodiments, the fourth plate body 134 can include a fifth sub-plate body 1341 and a sixth sub-plate body 1342, a third reinforcing beam 16 can be arranged between the fifth sub-plate body 1341 and the sixth sub-plate body 1342, the fifth sub-plate body 1341 is detachably connected to the frame body 12, the sixth sub-plate body 1342 is fixedly connected to the frame body 12, and the third reinforcing beam 16 is also connected to the frame body 12. In this way, when the fifth sub-plate body 1341 is detached, the second heat exchanger can be overhauled, and the sixth sub-plate body 1342 and the third reinforcing beam 16 are used to enhance the stability of the frame body 12.

[0154] In some embodiments, the fifth plate body 135 can include a seventh sub-plate body 1351 and an eighth sub-plate body 1352, a fourth reinforcing beam 17 can be arranged between the seventh sub-plate body 1351 and the eighth sub-plate body 1352, the seventh sub-plate body 1351 is detachably connected to the frame body 12, the eighth sub-plate body 1352 is fixedly connected to the frame body 12, and the fourth reinforcing beam 17 is also connected to the frame body 12. In this way, when the seventh sub-plate body 1351 is detached, the valve, the gas pipe and the liquid pipe can be overhauled, and the eighth sub-plate body 1352 and the fourth reinforcing beam 17 are used to enhance the stability of the frame body 12.

[0155] In some embodiments of the present application, the second heat exchanger can be a shell-and-tube heat exchanger, which has the characteristics of small volume, high heat exchange efficiency and no condensation. Using a shell-and-tube heat exchanger as the second heat exchanger, a heat exchanger water pan does not need to be arranged, which can save the space requirement of the direct expansion unit 100.

[0156] Please refer to Figure 1 to Figure 20 , Figure 20 for Figure 1Fig. 17 is a structural schematic view of the direct expansion unit 100 shown. In some embodiments of the present application, the bottom of the shell 10 is provided with a mounting opening. The direct expansion unit 100 can further include a complete machine base 91, which is arranged at the mounting opening and connected with the frame 12. The complete machine base 91 can include a base body 911 and a protruding connecting portion 912 connected with the base body 911.

[0157] The base body 911 includes a plurality of channel steel bars 9111 arranged at intervals to form a hollow structure. In this way, the base body 911 can facilitate heat dissipation of the refrigerant circulation system 20 in the accommodating cavity 112, preventing component failure due to poor heat dissipation.

[0158] The bottom end of the first stand column 121 is provided with an opening. The protruding connecting portion 912 is fixedly connected with the base body 911, and the protruding connecting portion 912 can be inserted into the opening at the bottom end of the first stand column 121. In this way, the frame 12 can be fixedly connected with the base body 911, thereby enhancing the stability of the frame 12.

[0159] In some embodiments of the present application, the direct expansion unit 100 can further include a compressor base 92 and a second heat exchanger base 93. The compressor base 92 and the second heat exchanger base 93 are both arranged in the accommodating space 11 and located on the base body 911. The compressor base 92 can be connected with the second heat exchanger base 93. The compressor base 92 is used for mounting a compressor, and the second heat exchanger base 93 is used for mounting a second heat exchanger.

[0160] The compressor base 92 and the second heat exchanger base 93 are both located on the base body 911, and no foaming plate structure is required between the compressor base 92, the second heat exchanger base 93 and the base body 911. In this way, the thickness of the base can be reduced, thereby reducing the space required by the direct expansion unit 100.

[0161] The compressor base 92 and the second heat exchanger base 93 can be fixedly connected by welding. In this way, installation and maintenance can be facilitated.

[0162] Since the compressor generates condensate water during operation, the compressor base 92 can include a base body 921 and a compressor water pan 922 connected between the base body 921 and the base body 911 for containing the condensate water generated by the compressor.

[0163] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0164] The above merely illustrates the specific implementation manners of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A direct expansion unit, characterized by, The direct expansion unit comprises: a shell, an air outlet channel and a containing cavity are formed in the shell, and an air inlet and an air outlet are arranged on the shell and communicate with the air outlet channel; a second partition plate is used to separate the containing cavity from the air outlet channel; a water pan is arranged in the shell; a first heat exchanger is arranged on the water pan, at least part of the first heat exchanger is arranged in the air outlet channel and located between the air inlet and the air outlet, an angle between a windward surface of the first heat exchanger and a plane on which the water pan is located is greater than 0° and less than 90°; a compressor is arranged in the containing cavity; a second heat exchanger is arranged in the containing cavity, and the second heat exchanger, the compressor and the first heat exchanger are connected through a refrigerant circulation pipeline to form a refrigerant circulation loop; an opening is arranged on the second partition plate, the refrigerant circulation pipeline connects the first heat exchanger and the second heat exchanger through the opening, and / or the refrigerant circulation pipeline connects the first heat exchanger and the compressor through the opening; a solenoid valve is arranged on the refrigerant circulation pipeline, and the solenoid valve is located on the windward side of the first heat exchanger.

2. A direct expansion unit as set forth in claim 1, wherein The direct expansion unit further comprises a height increasing piece arranged on the water pan. The first heat exchanger comprises a first mounting portion and a second mounting portion, the first mounting portion and the second mounting portion are oppositely arranged, the first mounting portion is connected to or abuts against one end of the height increasing piece away from the water pan, and the second mounting portion is connected to or abuts against the water pan, so that the first heat exchanger is arranged on the water pan in an inclined manner.

3. A direct expansion unit as set forth in claim 2, wherein The height increasing piece comprises: a first height increasing piece and a second height increasing piece, the first height increasing piece and the second height increasing piece are arranged on the water pan in a spaced manner; The direct expansion unit further comprises a first fixing piece, the first fixing piece is connected to one end of the first height increasing piece and the second height increasing piece away from the water pan, and at least part of the first fixing piece is in surface contact with the first mounting portion.

4. A direct expansion unit as set forth in claim 3, wherein The first fixing piece comprises: a first connecting plate connected to the first height increasing piece; a second connecting plate connected to the second height increasing piece; a fixing strip extending along the arrangement direction of the first height increasing piece and the second height increasing piece, the fixing strip is connected to the first connecting plate and the second connecting plate, and is in surface contact with the first mounting portion.

5. A direct expansion unit as set forth in claim 3, wherein The direct expansion unit comprises: a second fixing piece connected to the water pan, and at least part of the second fixing piece is in surface contact with the second mounting portion.

6. A direct expansion unit as set forth in claim 5, wherein, The second fixing piece comprises: a first bent edge connected to the water pan; a support plate connected to the first bent edge, and the support plate is in surface contact with a side wall of the first heat exchanger, at least part of the side wall of the first heat exchanger constitutes at least part of the second mounting portion.

7. A direct expansion unit as set forth in claim 6, wherein The second fixing piece further comprises: A second bent side is connected to a side of the support plate away from the first bent side, and the second bent side is in contact with at least part of a windward surface of the first heat exchanger, at least part of the windward surface of the first heat exchanger constituting at least part of the second mounting portion.

8. A direct expansion unit, characterized by, Comprise: A housing, an air outlet channel and a receiving cavity are formed in the housing; A second partition plate is used to separate the receiving cavity from the air outlet channel; A water pan is arranged in the housing; A first heat exchanger is arranged on the water pan, and the angle between the plane on which the first heat exchanger is located and the plane on which the water pan is located is greater than 0° and less than 90°; A compressor is arranged in the receiving cavity; A second heat exchanger is arranged in the receiving cavity, and the second heat exchanger, the compressor and the first heat exchanger are connected through a refrigerant circulation pipeline to form a refrigerant circulation loop; An opening is provided on the second partition plate, and the refrigerant circulation pipeline connects the first heat exchanger and the second heat exchanger through the opening, and / or the refrigerant circulation pipeline connects the first heat exchanger and the compressor through the opening; A solenoid valve is arranged on the refrigerant circulation pipeline, and the solenoid valve is located on the windward side of the first heat exchanger.

Images