Indoor unit and heating and ventilation system

Abstract

The utility model discloses an indoor unit and a heating and ventilation system. The indoor unit comprises a shell, a water pump assembly and a connecting pipe, a heat exchange air duct is defined in the shell, the shell comprises a water pan, at least part of the water pan forms the inner wall face of the heat exchange air duct, and the water pan is provided with a water receiving groove. The water pump assembly is arranged beside the water pan and comprises a water pump box and a water pump, the water pump box is provided with a water pumping cavity, and the water pump is arranged in the water pumping cavity and used for pumping water in the water pumping cavity. And the other end of the connecting pipe is connected with the water pump box, so that the water receiving tank is communicated with the water pumping cavity. According to the technical scheme, the water pump can be conveniently disassembled, assembled and overhauled, and working efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of HVAC technology, and in particular to an indoor unit and a HVAC system. Background Art

[0002] The HVAC system generally consists of two parts: an indoor unit and an outdoor unit. The indoor unit and the outdoor unit are connected by pipes, so that the indoor unit can deliver airflow in the use environment to adjust the temperature and humidity of the use environment.

[0003] The indoor unit is provided with a water receiving pan and a heat exchanger installed above the water receiving pan, and the water receiving pan is used to collect condensed water generated during the operation of the heat exchanger. To facilitate the discharge of condensed water, some indoor units are also provided with a water pump to pump the condensed water out of the water receiving pan.

[0004] In the related art, the water pump is arranged in a water receiving tray. When the staff inspects the water pump, the water receiving tray needs to be disassembled, which makes the inspection and maintenance of the water pump more complicated and inefficient. Utility Model Content

[0005] The embodiment of the present application provides an indoor unit and a HVAC system, which can facilitate the disassembly and maintenance of a water pump and improve work efficiency.

[0006] In a first aspect, an embodiment of the present application provides an indoor unit, comprising:

[0007] A shell defines a heat exchange air duct therein, the shell includes a water receiving tray, at least a portion of the water receiving tray forms an inner wall surface of the heat exchange air duct, and the water receiving tray is provided with a water receiving groove;

[0008] A water pump assembly is arranged beside the water receiving tray, comprising a water pump box and a water pump, wherein the water pump box is provided with a water pumping cavity, and the water pump is arranged in the water pumping cavity for pumping water in the water pumping cavity; and

[0009] A connecting pipe has one end connected to the water receiving tray and the other end connected to the water pump box to connect the water receiving trough and the water pumping cavity.

[0010] In one embodiment, the water receiving tray is provided with a first joint communicating with the water receiving tank, the water pump box is provided with a second joint communicating with the water pumping chamber, one end of the connecting pipe is sleeved with the first joint, and the other end is sleeved with the second joint;

[0011] Wherein, the first connector and the second connector are arranged opposite to each other.

[0012] In one embodiment, at least one of the first joint and the second joint is provided with a first limiting portion, and at least one end of the connecting pipe is provided with a second limiting portion, and the first limiting portion and the second limiting portion are connected in a limiting manner to resist displacement or deformation of the connecting pipe along its own axial direction.

[0013] In one embodiment, the first limiting portion is a limiting column, and the second limiting portion is a limiting hook, and the limiting hook is hooked on the limiting column; and / or,

[0014] The connecting pipe comprises a pipe body and a clamp, wherein the clamp is provided at at least one end of the pipe body, and at least one of the clamps is provided with the second limiting portion; and / or,

[0015] The connecting pipe is a straight pipe.

[0016] In one embodiment, the water pump is provided with a water pumping port, and the water pumping port is spaced apart from the bottom wall of the water pumping chamber;

[0017] Wherein, a water storage tank is provided on the bottom wall of the water pumping cavity, and the projection of the water pumping port on the bottom wall of the water pumping cavity is located in the water storage tank.

[0018] In one embodiment, the water pump box is provided with a drain pipe, the drain pipe defines a drainage channel, and the water pump has a water outlet, which is communicated with the drainage channel.

[0019] In one embodiment, a water outlet pipe is further included, wherein the water outlet pipe is connected to the drain pipe, and the water outlet pipe extends from top to bottom from one end connected to the drain pipe to the other end away from the drain pipe.

[0020] In one embodiment, the water pump box comprises:

[0021] A first box body is provided with the drain pipe; and

[0022] a second box body connected to the first box body and defining the water pumping cavity with the first box body, and the second box body is connected to the connecting pipe;

[0023] The water pump is provided with a water pumping port, the bottom wall of the second box body is provided with a water storage tank, and the projection of the water pumping port on the bottom wall of the second box body is located in the water storage tank.

[0024] In one embodiment, the water pump assembly further comprises:

[0025] The check valve is arranged between the water outlet and the drainage channel to allow the water outlet to conduct one-way to the drainage channel.

[0026] In one embodiment, a water level switch is further included. The water level switch is arranged in the water receiving trough or the water pumping chamber. The water level switch includes a float that can float and change with the water surface height. The water level switch is used to generate a signal for the water pump to operate by triggering the float when the water level reaches a preset water level.

[0027] In one embodiment, the indoor unit further includes a first heat-insulating member, wherein the first heat-insulating member is wrapped around the outside of the connecting pipe; and / or,

[0028] The indoor unit further includes a second heat-insulating member, which at least wraps the bottom and the peripheral side of the water pump box.

[0029] In one embodiment, the water pump box comprises:

[0030] A first box body connected to the housing and defining a drainage channel; and

[0031] a second box body connected to the first box body and defining the water pumping cavity with the first box body, and the second box body is connected to the connecting pipe;

[0032] The water pump is fixedly connected to at least one of the first box body and the second box body, and is provided with a water suction port and a water outlet, wherein the water suction port is connected to the water suction cavity, and the water outlet is connected to the drainage channel.

[0033] In one embodiment, the indoor unit further includes a heat exchanger, and the bottom of the water receiving tray defines the water receiving tank, and the water receiving tank includes:

[0034] a water collecting portion defining at least a portion of the bottom wall of the heat exchange air duct, wherein the heat exchanger is disposed in the water collecting portion; and

[0035] A drainage portion, located at one side of the water collecting portion and communicated with the water collecting portion, and a bottom wall of the drainage portion is lower than a bottom wall of the water collecting portion, so that water in the water collecting portion flows to the drainage portion;

[0036] Wherein, the water pump box and the drainage part are arranged side by side, and the water pumping cavity is connected to the drainage part.

[0037] In a second aspect, the present application also provides a HVAC system, the HVAC system comprising:

[0038] outdoor unit; and

[0039] In the indoor unit as described in any one of the above items, the indoor unit is connected to the outdoor unit through a pipeline.

[0040] In the embodiment of the present application, by setting the water pump assembly next to the water receiving tray, the staff no longer need to disassemble the water receiving tray when repairing the water pump, but can directly operate the water pump box, thereby reducing steps, simplifying operations, reducing maintenance difficulty, and improving work efficiency.

[0041] Moreover, the water pump assembly is connected to the water receiving pan via a connecting pipe. On the one hand, the connecting pipe has high flexibility, thereby making the setting of the water pump assembly more flexible and facilitating the structural arrangement. On the other hand, the setting of the connecting pipe can avoid the high processing precision and operating difficulty required for direct connection between the water pump box and the water receiving pan, thereby reducing production costs, improving production efficiency, and making the disassembly and assembly of the water pump assembly more convenient, further improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0043] Figure 1 This is a structural schematic diagram of an indoor unit according to an embodiment of the present application;

[0044] Figure 2 for Figure 1 Schematic diagram of the bottom structure of the indoor unit;

[0045] Figure 3 for Figure 1 The structural diagram of the indoor unit in section AA;

[0046] Figure 4 for Figure 1 Schematic diagram of the exploded structure of the indoor unit;

[0047] Figure 5 This is a schematic diagram of the structure of the water tray and water pump assembly of this application;

[0048] Figure 6 This is a schematic diagram of the explosion structure of an embodiment of the connecting pipe of the present application;

[0049] Figure 7 for Figure 5 A schematic diagram of the enlarged structure at B in the middle;

[0050] Figure 8 for Figure 5 Schematic diagram of the exploded structure of the water pump assembly;

[0051] Fig. 9 for Figure 5 A schematic diagram of the half-section structure of the water pump assembly;

[0052] Fig.10 This is a schematic diagram of the structure of the indoor unit water pump assembly and water outlet pipe of this application.

[0053] Description of Figure Numbers:

[0054] 100, indoor unit; 101, air duct air inlet interface; 102, air duct air outlet interface; 103, water outlet pipe; 10, shell; 11, air inlet chamber; 12, pressure diffusion chamber; 13, heat exchange chamber; 14, air inlet; 15, air outlet; 20, first shell; 20a, upper cover; 21, air inlet chamber upper shell; 22, pressure diffusion chamber upper shell; 23, heat exchange chamber upper shell; 24, air inlet chamber rear shell; 30, second shell; 31, pressure diffusion chamber lower shell; 32, water receiving tray; 321, water receiving trough; 3211, water collecting part; 3213, drainage part; 323, overlapping boss; 325, first joint; 32 51. first limit part; 40. side panel; 50. fan; 51. wind wheel; 53. motor; 60. heat exchanger; 70. water pump assembly; 71. water pump box; 71a. water pumping chamber; 71b. water storage tank; 711. first box body; 712. second box body; 713. second joint; 714. drain pipe; 73. water pump; 731. water pumping port; 733. water outlet; 74. water level switch; 75. check valve; 80. connecting pipe; 81. pipe body; 811. annular groove; 83. clamp; 831. second limit part; 90. first thermal insulation member; 91. second thermal insulation member.

[0055] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0056] In order to make the objectives, technical solutions and advantages of the present application clearer, the following part will further describe the embodiments of the present application in detail in conjunction with the accompanying drawings.

[0057] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0058] In the description of the present application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0060] In the present application, an up-down direction ZZ, a front-back direction YY, and a left-right direction XX are defined, and the up-down direction ZZ, the front-back direction YY, and the left-right direction XX are arranged at an angle to each other.

[0061] The embodiment of the present application provides a HVAC system, which includes an indoor unit 100 and an outdoor unit, and the indoor unit 100 is connected to the outdoor unit through cables, pipes, etc., so as to work together to adjust the indoor environment. It can be understood that the indoor unit 100 is set indoors and is usually installed in the form of a ceiling to supply air indoors.

[0062] Please refer to Figures 1 to 3 The indoor unit 100 includes a housing 10 , a fan 50 , a heat exchanger 60 , a connecting pipe 80 and a water pump assembly 70 .

[0063] The housing 10 defines a heat exchange air duct suitable for the indoor unit 100 for gas flow. The heat exchange air duct includes an air inlet chamber 11, a pressure diffusion chamber 12, and a heat exchange chamber 13 which are connected in sequence. The housing 10 also forms an air suction port 14 connected to the air inlet chamber 11 and an air outlet 15 connected to the heat exchange chamber 13, so that the gas can enter the heat exchange air duct from the air suction port 14, and can pass through the air inlet chamber 11, the pressure diffusion chamber 12, and the heat exchange chamber 13 in sequence, and finally flow out from the air outlet 15.

[0064] To facilitate the assembly of the indoor unit 100, the housing 10 includes a first housing 20 and a second housing 30. The first housing 20 and the second housing 30 can be made of metal materials such as aluminum alloy or stainless steel to meet the requirements of high strength and corrosion resistance, or the first housing 20 and the second housing 30 can also be made of plastic materials to achieve lightweight housing 10. They can be connected individually or in combination by means of clamping, riveting, welding and bolting, etc., and the present application does not limit this.

[0065] Specifically, please combine Figure 1 and Figure 4The first housing 20 includes an upper cover 20a and two side panels 40. The two side panels 40 are spaced apart in the left-right direction XX. The upper cover 20a is generally disposed above the two side panels 40 and extends along the front-rear direction YY. The upper cover 20a is connected to the two side panels 40 on both sides along the left-right direction XX. In this way, the upper cover 20a and the two side panels 40 are spliced ​​to form the first housing 20. The second housing 30 is spaced apart from the upper cover 20a in the up-down direction ZZ. The second housing 30 is connected to the two side panels 40 on both sides along the left-right direction XX. The first housing 20, the second housing 30 and the two side panels 40 are spliced ​​to form the housing 10.

[0066] like Figure 3 and Figure 4 As shown, along the front-to-back direction YY from back to front, the upper cover 20a includes an air inlet chamber rear shell 24, an air inlet chamber upper shell 21, a pressure diffuser chamber upper shell 22 and a heat exchange chamber upper shell 23 connected in sequence, and the second shell 30 includes an air inlet chamber front shell, a shell body and a water receiving tray 32 connected in sequence. The air inlet chamber rear shell 24 and the air inlet chamber front shell are spaced apart in the front-to-back direction YY, and the air inlet chamber rear shell 24, the air inlet chamber upper shell 21, the air inlet chamber front shell and the side panels 40 define the air inlet chamber 11. The pressure diffuser chamber upper shell 22 and the pressure diffuser chamber lower shell 31 are spaced apart in the upper line direction ZZ, and the pressure diffuser chamber upper shell 22, the pressure diffuser chamber lower shell 31 and the side panels 40 define the pressure diffuser chamber 12, and the heat exchange chamber upper shell 23, the water receiving tray 32 and the side panels 40 define the heat exchange chamber 13.

[0067] The fan 50 is arranged in the air inlet chamber 11, and it can be a cross-flow fan 50, a centrifugal fan 50 or an axial flow fan 50, etc. Taking the cross-flow fan 50 as an example, the fan 50 includes a wind wheel 51 and a motor 53. The wind wheel 51 is arranged in a long cylindrical shape. The motor 53 is arranged at one end of the wind wheel 51 and connected to the housing 10, and the output shaft of the motor 53 is connected to the wind wheel 51. A plurality of blades are distributed along the circumference of the wind wheel 51. When the motor 53 drives the wind wheel 51 to rotate, the rotating blades can cause the gas to flow from the air inlet chamber 11 to the pressure diffusion chamber 12. The cross-flow fan 50 has the advantages of energy saving, large air volume, low noise and simple installation.

[0068] Combination Figure 3 and Figure 4 The heat exchanger 60 is accommodated in the heat exchange cavity 13, and is used to exchange heat with the airflow flowing through the heat exchange cavity 13 and passing through the heat exchanger 60. For example, a plurality of refrigerant pipes are provided in the heat exchanger 60, and the gas exchanges heat with the refrigerant in the pipe when passing through the heat exchanger 60, thereby changing the temperature of the gas. During cooling, the gas exchanges heat with the refrigerant in the heat exchanger 60 to form low-temperature air; during heating, the gas exchanges heat with the refrigerant in the heat exchanger 60 to form heated air. The shape of the heat exchanger 60 of the present application can be a variety of shapes such as straight line, V-shaped, arc-shaped or wavy, which are not limited here.

[0069] In the embodiment of the present application, the heat exchanger 60 is arranged on the water receiving pan 32, and a water receiving groove 321 is formed at the bottom of the water receiving pan 32. During the operation of the indoor unit 100, condensed water may be formed on the heat exchanger 60, and the condensed water enters the water receiving groove 321 under the action of gravity. As time goes by, the condensed water accumulates in the water receiving groove 321 and the water level gradually rises. In order to facilitate the discharge of condensed water, some indoor units 100 are also provided with a water pump assembly 70. In the related art, the water pump 73 of some indoor units 100 is arranged in the water receiving pan 32. When the staff disassembles and overhauls the water pump 73, it is necessary to disassemble the water receiving pan 32, and the overhaul of the water pump 73 is relatively complicated and inefficient.

[0070] Please refer to Figure 2 In the embodiment of the present application, the water pump assembly 70 is arranged beside the water receiving tray 32. That is to say, the water pump assembly 70 is arranged outside the water receiving tray 32 and is arranged next to the water receiving tray 32. The water pump assembly 70 includes a water pump box 71 and a water pump 73. Among them, the water pump box 71 can be connected to the shell 10, or the water pump box 71 can be connected to a structure outside the shell 10, such as a ceiling. The water pump box 71 is roughly columnar and can be made of materials such as plastic or metal, which is not limited in the embodiment of the present application. The interior of the water pump box 71 is hollow to form a water pumping chamber 71a, and the water pump 73 is arranged in the water pumping chamber 71a to extract water from the water pumping chamber 71a.

[0071] One end of the connecting pipe 80 is connected to the water receiving tray 32, and the other end is connected to the water pump box 71, so as to connect the water receiving trough 321 and the water pumping chamber 71a. Under the premise of connecting the water receiving trough 321 and the water pumping chamber 71a, the present application does not limit the shape of the connecting pipe 80, and the connecting pipe 80 can be made of materials such as plastic or resin for easy processing. In this way, the water receiving trough 321 and the water pumping chamber 71a are formed into a communicating vessel structure through the connecting pipe 80, and the condensed water in the water receiving trough 321 can flow into the water pumping chamber 71a through the connecting pipe 80, and then be discharged from the water pumping chamber 71a under the suction action of the water pump 73, so that the operation of discharging the condensed water in the water receiving trough 321 can be realized when the water pump 73 is set outside the water receiving tray 32.

[0072] It can be understood that in the embodiment of the present application, by setting the water pump assembly 70 beside the water receiving tray 32, when the staff inspects the water pump 73, there is no need to disassemble the water receiving tray 32, but can directly operate the water pump box 71, thereby reducing steps, simplifying operations, reducing maintenance difficulties, and improving work efficiency. In addition, the water pump assembly 70 is connected to the water receiving tray 32 through the connecting pipe 80. On the one hand, the connecting pipe 80 has high flexibility, so that the setting of the water pump assembly 70 is more flexible and convenient for structural arrangement; on the other hand, the setting of the connecting pipe 80 can avoid the high processing precision and operation difficulty required for the direct connection between the water pump box 71 and the water receiving tray 32, thereby reducing production costs, improving production efficiency, and making the disassembly and assembly of the water pump assembly 70 more convenient, further improving work efficiency.

[0073] Please refer to Figure 3 and Figure 5 In some embodiments, the bottom of the water receiving tray 32 is formed as a water receiving groove 321, and the water receiving groove 321 includes a water collecting portion 3211 and a drainage portion 3213. Optionally, the water collecting portion 3211 defines at least part of the bottom wall of the heat exchange air duct, the heat exchanger 60 is installed on the water collecting portion 3211, and the drainage portion 3213 is connected to the water pumping cavity 71a through the connecting pipe 80. The water collecting portion 3211 and the drainage portion 3213 are separated by a heat exchange cavity 13 partition plate to make the airflow in the heat exchange cavity 13 flow more smoothly.

[0074] like Figure 5 As shown, the water collecting portion 3211 is extended along the left-right direction XX, the drainage portion 3213 is arranged at one end of the water collecting portion 3211, and the air outlet 15 is arranged on the side of the water collecting portion 3211 away from the pressure diffusion chamber 12 along the front-back direction YY. In one embodiment, the height of the bottom wall of the water collecting portion 3211 in the up-down direction ZZ gradually decreases along the direction close to the drainage portion 3213, so that the condensed water gathered in the water collecting portion 3211 can flow to the drainage portion 3213, which is not only convenient for drainage, but also can reduce the retention of condensed water in the water collecting portion 3211, facilitate air flow and reduce the impact of condensed water on the heat exchanger 60. In order to facilitate the installation of the heat exchanger 60, the bottom wall of the water collecting portion 3211 is also convexly provided with a lap boss 323, which is in the shape of a long strip extending along the left-right direction to support the heat exchanger 60. In this way, the heat exchanger 60 is mounted and fixed on the overlapping boss 323, which can prevent the heat exchanger 60 from being soaked in water and causing the side plates of the heat exchanger 60 to rust, thereby extending the service life of the heat exchanger 60. Figure 3In the illustrated embodiment, the overlapping boss 323 is arranged near the connection between the heat exchange chamber 13 and the pressure diffusion chamber 12, and most of the structures of the heat exchanger 60 are arranged in the space between the overlapping boss 323 and the air outlet 15. When the indoor unit 100 is working, condensed water drips more from between the overlapping boss 323 and the air outlet 15. Further, the height of the bottom wall of the water collecting part 3211 in the vertical direction ZZ gradually decreases in the direction away from the air outlet 15, so as to further make the condensed water quickly gather and drain to the drainage part 3213. Optionally, when observing the water collecting part 3211 along the left-right direction XX, the bottom of the water collecting part 3211 between the overlapping boss 323 and the air outlet 15 is arranged in a concave arc shape, which can further accelerate the gathering of condensed water.

[0075] The drainage portion 3213 is connected to the water collecting portion 3211, and the bottom wall of the drainage portion 3213 is lower than the bottom wall of the water collecting portion 3211. On the one hand, the water in the water collecting portion 3211 can flow to the drainage portion 3213 for drainage, and on the other hand, condensed water can be temporarily stored. The water receiving tray 32 is provided with a first joint 325 for connecting to the connecting pipe 80. The first joint 325 is connected to the drainage portion 3213, and the condensed water in the drainage portion 3213 can be discharged through the first joint 325. The first joint 325 is arranged in a tubular shape and is arranged close to the bottom wall of the drainage portion 3213, so that as much water as possible in the drainage portion 3213 can be discharged to reduce the amount of water in the drainage portion 3213.

[0076] like Figure 5 As shown, the water pump box 71 and the first joint 325 are arranged on the side of the water receiving tray 32 away from the air outlet 15. The water pump box 71 and the first joint 325 are arranged at intervals and fixedly connected to the housing 10. The water pump box 71 is provided with a second joint 713 ( Figure 8 As shown), one end of the connecting pipe 80 is sleeved with the first joint 325, and the other end is sleeved with the second joint 713 to connect the drainage part 3213 and the pumping chamber 71a.

[0077] In some embodiments, the first connector 325 and the second connector 713 are arranged opposite to each other, and the connecting pipe 80 is a straight pipe, thereby reducing the complexity of the pipeline and facilitating structural layout. Moreover, the structure of the connecting pipe 80 is relatively simple, which is convenient for processing and manufacturing, and the connection operation is relatively simple, thereby improving work efficiency.

[0078] Since the first joint 325 is arranged in the drain portion 3213, the water pump box 71 and the drain portion 3213 are arranged side by side along the front-to-back direction YY, thereby shortening the distance between the water pump 73 and the drain portion 3213 and improving the suction and discharge efficiency. In this way, the water pump box 71 can avoid the heat exchange air duct and has sufficient installation space.

[0079] Of course, in other embodiments of the present application, the connecting pipe 80 may also be a curved pipe, and the water pump box 71 may be disposed at other locations of the indoor unit 100 depending on the situation, which is not limited here.

[0080] Please refer to Figure 6 In some structural forms, the connecting pipe 80 includes a pipe body 81 and a clamp 83, one end of the pipe body 81 is sleeved on the first joint 325, and the other end is sleeved on the second joint 713. The joints at both ends of the pipe body 81 are roughly cylindrical, and the clamp 83 is annular and clamps at least one end of the pipe body 81 to improve the tightness of the connection between the pipe body 81 and the first joint 325 and the second joint 713. Optionally, the connecting pipe 80 includes two clamps 83, and the two clamps 83 are respectively clamped on one end of the pipe body 81 connected to the first joint 325 and one end of the pipe body 81 connected to the second joint 713.

[0081] The clamp 83 can be made of metal, which has high strength and stability and long service life, or the clamp 83 can be made of elastic rubber material, which has good elasticity to provide sufficient clamping force. Further, to ensure the stability of the clamp 83 relative to the pipe body 81, an annular groove 811 is provided at the end of the pipe body 81, and the clamp 83 is arranged in the annular groove 811.

[0082] Combination Figure 6 and Figure 7 In one embodiment, in order to further improve the stability of the connecting pipe 80, at least one of the first joint 325 and the second joint 713 is provided with a first limiting portion 3251, and at least one end of the connecting pipe 80 is provided with a second limiting portion 831. The limiting connection between the first limiting portion 3251 and the second limiting portion 831 can not only reduce or avoid the displacement of the pipe body 81 along its own axial direction, but also reduce the degree of deformation for some pipe bodies 81 made of easily deformable materials. In this way, by setting the limiting cooperation between the first limiting portion 3251 and the second limiting portion 831, the stability of the connecting pipe 80 can be improved, the service life can be extended, and the risk of water leakage can be reduced.

[0083] Exemplarily, the first limiting portion 3251 is a limiting column convexly arranged on the outer circumferential surface of the first joint 325, and the second limiting portion 831 is a limiting hook arranged at the end of the pipe body 81, and the limiting hook is hooked on the limiting column, so as to provide a force when the pipe body 81 is displaced or deformed to maintain the connection between the pipe body 81 and the first joint 325. Similarly, the first limiting portion 3251 and the second limiting portion 831 can also adopt the above-mentioned structure at the second joint 713, which will not be repeated here.

[0084] Among them, the limiting column can be integrally formed with the first joint 325 to improve processing efficiency and structural integrity, or the limiting column can also be separately set from the first joint 325. Similarly, the limiting hook and the tube body 81 can also be integrally formed or separately set, without limitation.

[0085] Furthermore, in one embodiment, part of the structure of the clamp 83 forms the second position-limiting portion 831. For example, the clamp 83 can be made of metal, a part of which is disposed in the annular groove 811 to clamp the end of the pipe body 81, and the other part is bent to form a position-limiting hook. In this way, the second position-limiting portion 831 is combined with the clamp 83 in this embodiment, which reduces the number of parts, has a more compact structure, can reduce the difficulty of assembly, and improve work efficiency.

[0086] Please refer to Figure 2 , Figure 5 as well as Figure 8 In some embodiments, the water pump box 71 is located on one side of the drainage portion 3213 along the front-to-back direction YY, and is arranged away from the air outlet 15. Optionally, the water pump box 71 is fixedly connected to the side panel 40 and the lower shell 31 of the diffuser chamber. The interior of the water pump box 71 is hollow to form the above-mentioned water pumping chamber 71a. The water pump 73 is arranged in the water pumping chamber 71a, and extracts water in the water pumping chamber 71a through the water pumping port 731. The water pump box 71 is provided with the above-mentioned second joint 713 on the side facing the water receiving tray 32, and is provided with a drain pipe 714. The drain pipe 714 defines a drainage channel, and the water pump 73 is provided with a water outlet 733 connected to the drainage channel, so that the water extracted by the water pump 73 is discharged through the drainage channel.

[0087] Optionally, the water pump box 71 includes a first box body 711 and a second box body 712, the first box body 711 and the second box body 712 are arranged along the up-down direction ZZ, and the two are connected to define a water pumping chamber 71a, wherein the bottom wall of the second box body 712 is configured as the bottom wall of the water pumping chamber 71a, and the water pump 73 is fixedly connected to at least one of the first box body 711 and the second box body 712, or the water pump 73 is relatively fixed to the water pump box 71 through the cooperation of the first box body 711 and the second box body 712. The first box body 711 and the second box body 712 arranged separately are more conducive to production and disassembly, easy to repair, and can improve work efficiency.

[0088] The first joint 325 is arranged on the outside of the second box body 712, and the drain pipe 714 is arranged on the top of the first box body 711, and is partially located in the water pumping cavity 71a, so as to be connected with the water pump 73. It can be understood that the first joint 325 and the second box body 712, the drain pipe 714 and the first box body 711 can be separately arranged, or the first joint 325 and the second box body 712, the drain pipe 714 and the first box body 711 can also be integrally formed, and the integral forming is conducive to improving the production efficiency and assembly efficiency, and the structural integrity is better.

[0089] Please refer to Fig. 9 The water pumping port 731 is located at the bottom of the water pump 73, and the water pumping port 731 is spaced apart from the bottom wall of the water pumping chamber 71a, and when the water level in the water pumping chamber 71a is not lower than the water pumping port 731, the water pump 73 can pump water through the water pumping port 731. It can be understood that the water pumping chamber 71a can also play the role of temporarily storing condensed water, thereby improving the ability of the indoor unit 100 to temporarily store condensed water.

[0090] In one embodiment, a water storage tank 71b is provided on the bottom wall of the water pumping chamber 71a. The embodiment of the present application does not limit the shape of the water storage tank 71b, which can be round, square, etc. The bottom wall of the water storage tank 71b is lower than the bottom wall of the water pumping chamber 71a, so that the condensed water flowing into the water pumping chamber 71a will be gathered in the water storage tank 71b, further increasing the volume of the water pumping chamber 71a. The projection of the water pumping port 731 on the bottom wall of the water pumping chamber 71a is located in the water storage tank 71b, or in other words, the water pumping port 731 is arranged opposite to the notch of the water storage tank 71b, so as to facilitate the water pumping operation of the water pump 73.

[0091] Furthermore, the bottom of the water pump 73 extends into the water tank 71b so that the water suction port 731 is located in the water tank 71b. Since water is more easily stored in the water tank 71b, it is more conducive to the sensitive start or stop of the water pump 73, thereby achieving timely water pumping, a more thorough suction effect, and a more compact structure of the water pump assembly 70.

[0092] like Figure 8 and Fig. 9 As shown, in one embodiment, the indoor unit 100 is provided with a water level switch 74, which can be arranged in the drainage portion 3213 or in the pumping chamber 71a, so as to be able to sense the change in water level and send a signal to the controller of the indoor unit 100, so as to facilitate the control of the operation of the water pump 73. For example, the water level switch 74 is arranged in the pumping chamber 71a, so as to be able to sensitively reflect the change in water level in the pumping chamber 71a, so as to facilitate the start and stop control of the water pump 73. Optionally, the water level switch 74 is a float switch, including a float that can float and change with the height of the water surface. Exemplarily, when the water level is low, the float is at a low position, and the water level switch 74 continuously feeds back a low level to the controller, and when the water level reaches a set height, the float is at a high position, and the water level switch 74 feeds back a high level to the controller, and at this time the controller controls the operation of the water pump 73.

[0093] Of course, the water level switch 74 may also be configured in other optional ways, as long as it can reflect the water level changes in the pumping chamber 71a or the drainage portion 3213, and the embodiment of the present application does not limit this.

[0094] When the water pump 73 is running, the water pumped by the water pump 73 enters the drainage channel from the water outlet 733. In order to facilitate the discharge of condensed water from the indoor unit 100, the drainage pipe 714 is located above the water pump box 71. If the water pump 73 stops running and there is a lot of water in the external pipeline, the water is easy to flow back into the water pumping chamber 71a and even the water receiving tank 321 through the drainage channel, thereby causing the indoor unit 100 to leak. Fig. 9 In the embodiment shown, the water pump assembly 70 is further provided with a check valve 75, which is arranged between the water outlet 733 and the drainage channel so that the water outlet 733 is unidirectionally connected to the drainage channel. In this way, the water flowing back from the drainage channel to the water outlet 733 can be controlled, and the backflow rate can be reduced or prevented, thereby reducing or avoiding the possibility of condensed water backflowing into the water pumping chamber 71a and the water receiving groove 321, avoiding water leakage or operation failure of the indoor unit 100, and improving safety.

[0095] Combined with reference Fig.10 In some embodiments, the indoor unit 100 further includes a water outlet pipe 103, one end of which is connected to the drain pipe 714, and the other end can be used to connect to a water collecting device or the outside world to discharge the condensed water. It is worth noting that the water outlet pipe 103 is extended from one end connected to the drain pipe 714 to the other end away from the drain pipe 714 from top to bottom. For example, in order to facilitate the structural arrangement and reduce the material stress, the water outlet pipe 103 can extend in an arc shape and pass through the housing 10 to be connected to the external pipeline. As a result, the part of the water outlet pipe 103 close to the drain pipe 714 is lower than the drain pipe 714. It can be understood that when the condensed water in the water receiving tray 32 is completely discharged or the water level of the condensed water in the water receiving tray 32 is reduced to a certain height, the water pump assembly 70 will stop working. Due to the height difference between the drain pipe 714 and the main part of the water outlet pipe 103, the condensed water in the water outlet pipe 103 can be effectively reduced or avoided to flow back, reducing the risk of leakage.

[0096] Since the temperature of the condensed water is relatively low, moisture in the external air may condense when the condensed water flows through the connecting pipe 80, the water pump box 71, etc. Figure 6 In one embodiment, the indoor unit 100 includes a first heat preservation member 90, which is wrapped around the outside of the connecting pipe 80 to reduce the heat exchange between the external air and the condensed water, thereby reducing or avoiding the condensation phenomenon. Figure 8 As shown, the indoor unit 100 further includes a second heat-insulating member 91, which is wrapped around the outside of the water pump box 71 and at least wraps the exposed bottom and surrounding side of the water pump box 71, thereby reducing heat exchange. The first heat-insulating member 90 and the second heat-insulating member 91 may be heat-insulating cotton, which is low in cost and easy to install.

[0097] Please refer again Figure 2In some structural forms, in order to avoid increasing the size of the indoor unit 100 in the up-down direction ZZ, a space that is recessed upward is provided at the bottom of the second shell 30, and the water pump box 71 is provided in this space, so that the water pump box 71 can be provided outside the water receiving tray 32 without changing the height of the indoor unit 100, thereby making the structure of the indoor unit 100 provided in this embodiment more compact.

[0098] Furthermore, the indoor unit 100 provided in the present application may be a duct unit, which has a duct inlet interface 101 and a duct outlet interface 102, the duct inlet interface 101 being limited between the rear side of the heat exchange chamber 13 and the rear side of the fan chamber 50, and the air inlet 14 falling within the width range of the duct inlet interface 101 along the front-to-back direction YY. The shape of the duct inlet interface 101 is not limited, and the air in the duct can flow to the air inlet 14 through the duct inlet interface 101. The water pump assembly 70 and the connecting pipe 80 are exposed at the duct inlet interface 101, which makes it easier to maintain and overhaul the water pump assembly 70 and the connecting pipe 80, effectively improving work efficiency.

[0099] The above is an explanation of the specific structure of the indoor unit 100 in the embodiment of the present application. It can be understood that since the HVAC system of the present application adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0100] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0101] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An indoor unit, characterized in that: include: A shell defines a heat exchange air duct therein, the shell includes a water receiving tray, at least a portion of the water receiving tray forms an inner wall surface of the heat exchange air duct, and the water receiving tray is provided with a water receiving groove; A water pump assembly is arranged beside the water receiving tray, comprising a water pump box and a water pump, wherein the water pump box is provided with a water pumping cavity, and the water pump is arranged in the water pumping cavity for extracting water in the water pumping cavity; and A connecting pipe has one end connected to the water receiving tray and the other end connected to the water pump box to connect the water receiving trough and the water pumping cavity.

2. The indoor unit according to claim 1, characterized in that: The water receiving tray is provided with a first joint connected to the water receiving tank, the water pump box is provided with a second joint connected to the water pumping chamber, one end of the connecting pipe is sleeved with the first joint, and the other end is sleeved with the second joint; Wherein, the first connector and the second connector are arranged opposite to each other.

3. The indoor unit according to claim 2, characterized in that: At least one of the first joint and the second joint is provided with a first limiting portion, and at least one end of the connecting pipe is provided with a second limiting portion, and the first limiting portion and the second limiting portion are connected in a limiting manner to resist displacement or deformation of the connecting pipe along its own axial direction.

4. The indoor unit according to claim 3, characterized in that: The first limiting part is a limiting column, the second limiting part is a limiting hook, and the limiting hook is hooked on the limiting column; and / or, The connecting pipe comprises a pipe body and a clamp, wherein the clamp is provided at at least one end of the pipe body, and at least one of the clamps is provided with the second limiting portion; and / or, The connecting pipe is a straight pipe.

5. The indoor unit according to claim 1 or 4, characterized in that: The water pump is provided with a water pumping port, and the water pumping port is spaced apart from the bottom wall of the water pumping chamber; Wherein, a water storage tank is provided on the bottom wall of the water pumping cavity, and the projection of the water pumping port on the bottom wall of the water pumping cavity is located in the water storage tank.

6. The indoor unit according to claim 1 or 4, characterized in that: The water pump box is provided with a drainage pipe, the drainage pipe defines a drainage channel, and the water pump has a water outlet, which is communicated with the drainage channel.

7. The indoor unit according to claim 6, characterized in that: It also includes a water outlet pipe, which is connected to the drain pipe and extends from one end connected to the drain pipe to the other end away from the drain pipe from top to bottom.

8. The indoor unit according to claim 6, characterized in that: The water pump box comprises: A first box body is provided with the drain pipe; and a second box body connected to the first box body and defining the water pumping cavity with the first box body, and the second box body is connected to the connecting pipe; The water pump is provided with a water pumping port, the bottom wall of the second box body is provided with a water storage tank, and the projection of the water pumping port on the bottom wall of the second box body is located in the water storage tank.

9. The indoor unit according to claim 7 or 8, characterized in that: The water pump assembly also includes: The check valve is arranged between the water outlet and the drainage channel to allow the water outlet to conduct one-way to the drainage channel.

10. The indoor unit according to any one of claims 1 to 4 or 7 or 8, characterized in that: It also includes a water level switch, which is arranged in the water receiving trough or the water pumping chamber. The water level switch includes a float that can float and change with the water surface height. The water level switch is used to generate a signal for the water pump to run by triggering the float when the water level reaches a preset water level.

11. The indoor unit according to any one of claims 1 to 4 or 7 or 8, characterized in that: The indoor unit further includes a first heat-insulating member, wherein the first heat-insulating member is wrapped around the outside of the connecting pipe; and / or, The indoor unit further comprises a second heat-insulating member, which at least wraps the bottom and / or the peripheral side of the water pump box.

12. The indoor unit according to any one of claims 1 to 4 or 7 or 8, characterized in that: The indoor unit further includes a heat exchanger, and the bottom of the water receiving tray defines the water receiving tank, and the water receiving tank includes: a water collecting portion defining at least a portion of the bottom wall of the heat exchange air duct, wherein the heat exchanger is disposed in the water collecting portion; and A drainage portion, located at one side of the water collecting portion and communicated with the water collecting portion, and a bottom wall of the drainage portion is lower than a bottom wall of the water collecting portion, so that water in the water collecting portion flows to the drainage portion; Wherein, the water pump box and the drainage part are arranged side by side, and the water pumping cavity is connected to the drainage part.

13. A HVAC system, characterized in that: include: Outdoor unit; and The indoor unit according to any one of claims 1 to 12, wherein the indoor unit is connected to the outdoor unit via a pipeline.

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