Air handling unit

Abstract

The utility model discloses an air handling unit, which relates to the technical field of air conditioning equipment, and comprises a box body, a fan, a heat exchanger, a front panel and a refrigerant sensor, the fan is arranged in the box body, the heat exchanger is arranged in the box body and is positioned below the fan, and the front panel is detachably connected with the peripheral wall of the box body and covers the mounting port of the peripheral wall. The refrigerant sensor is installed in the box body and can be exposed out of the installation opening after the front panel is detached. When the refrigerant of the heat exchanger leaks, the refrigerant can be diffused to other positions of the box body after being accumulated to a certain concentration, and the refrigerant sensor can detect leakage of the refrigerant and give an alarm due to the fact that the refrigerant sensor is located in the box body. Due to the fact that the refrigerant sensor can be exposed out of the installation opening after the front panel is detached, the refrigerant sensor can be conveniently detached, and maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning equipment, in particular to an air handling unit. Background Art

[0002] In the prior art, the refrigerant used in air conditioners is flammable, necessitating the installation of a refrigerant detection sensor within the heat exchanger, where leakage may occur. In some wall-mounted air handling units, since the heat exchanger is located at the bottom and the density of the refrigerant is greater than that of air, the refrigerant sensor is typically located at the bottom of the air conditioner, near the bottom of the heat exchanger. However, placing the refrigerant sensor at the bottom of the air conditioner makes it difficult to inspect and repair the sensor. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides an air handling unit that can facilitate the disassembly and assembly of a refrigerant sensor, thereby improving maintenance efficiency.

[0004] According to an embodiment of the first aspect of the present invention, an air handling unit includes: a box body including a peripheral wall, wherein the peripheral wall is provided with a mounting opening;

[0005] A fan is installed in the box;

[0006] a heat exchanger, installed in the box and located below the fan;

[0007] a front panel, detachably connected to the peripheral wall and covering the installation opening;

[0008] The refrigerant sensor is installed in the box and is configured to be exposed at the installation opening when the front panel is removed.

[0009] The air handling unit according to the embodiment of the present invention has at least the following beneficial effects:

[0010] The fan is installed in the box, and the heat exchanger is installed in the box and located below the fan. The front panel and the surrounding wall of the box are detachably connected, covering the installation opening of the surrounding wall. The refrigerant sensor is installed in the box and can be exposed at the installation opening when the front panel is removed. When the refrigerant in the heat exchanger leaks, the refrigerant accumulates to a certain concentration and diffuses to other locations in the box. Since the refrigerant sensor is located in the box, it can detect the refrigerant leakage and alarm. Since the refrigerant sensor is exposed at the installation opening after the front panel is removed, it can be easily removed and installed, improving maintenance efficiency.

[0011] According to some embodiments of the present invention, the box body further includes a crossbeam fixedly connected to the middle portion of the box body.

[0012] According to some embodiments of the present invention, the peripheral wall is further provided with an air inlet, which is located below the mounting opening, and the crossbeam is fixedly connected to the front end of the peripheral wall and is located between the air inlet and the mounting opening.

[0013] According to some embodiments of the present invention, the box body also includes a bottom wall connected to the peripheral wall, one end of the heat exchanger is connected to the cross beam, and the other end of the heat exchanger is connected to the bottom wall; along the up and down directions, the refrigerant sensor is located on the side of the heat exchanger close to the installation port.

[0014] According to some embodiments of the present invention, the heat exchanger is configured to be tilted downward in a direction from front to rear, and the refrigerant sensor is located on an extension line of the upper end surface of the heat exchanger.

[0015] According to some embodiments of the present invention, a side plate of the heat exchanger close to a side of the crossbeam is sealed to the crossbeam to isolate the installation port and the air inlet.

[0016] According to some embodiments of the present invention, the crossbeam is connected to one side wall of the peripheral wall.

[0017] According to some embodiments of the present invention, the refrigerant sensor is installed on the beam.

[0018] According to some embodiments of the present invention, the air handling unit further includes a bracket, the refrigerant sensor is mounted on the crossbeam via the bracket, the bracket includes a shielding portion, and the shielding portion is located above the refrigerant sensor.

[0019] According to some embodiments of the present invention, the peripheral wall includes a left wall and a right wall arranged relatively to each other, the fan includes a volute, the air outlet of the volute is located on a side close to the right side wall, and along the left and right directions, the refrigerant sensor is located on a side close to the right side wall.

[0020] According to some embodiments of the present invention, on a projection plane from front to back, the orthographic projection of the fan and the orthographic projection of the refrigerant sensor are staggered.

[0021] According to some embodiments of the present invention, the peripheral wall is further provided with an air inlet, which is located below the installation port. The air handling unit further includes a filter assembly, which is installed on the side of the heat exchanger facing the air inlet.

[0022] According to some embodiments of the present invention, the filter assembly includes a high-efficiency filter detachably connected to the housing.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 This is a structural diagram of an air handling unit according to an embodiment of the present invention;

[0026] Figure 2 This is an explosion diagram of an air handling unit according to an embodiment of the present invention;

[0027] Figure 3 This is a front view of an air handling unit according to an embodiment of the utility model with the front panel hidden;

[0028] Figure 4 for Figure 3 Cross-sectional view at AA in the middle;

[0029] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0030] Figure 6 This is a structural diagram of an air handling unit after hiding the front panel and fan in another embodiment of the utility model;

[0031] Figure 7 for Figure 6 A front view of the air handling unit in FIG;

[0032] Figure 8 for Figure 4 Enlarged view of point C in the middle.

[0033] Figure Number:

[0034] Air handling unit 1000;

[0035] Box body 100; peripheral wall 110; installation opening 111; left side wall 112; right side wall 113; rear side wall 114; front panel 120; crossbeam 130; air inlet 140; bottom wall 150; disassembly opening 160;

[0036] Fan 200; volute 210; air outlet 220; air intake 230;

[0037] Heat exchanger 300; filter assembly 310; filter screen 311; side plate 320;

[0038] Refrigerant sensor 400; bracket 410; shielding portion 411; pipeline assembly 420;

[0039] Water receiving tray 500; water outlet connector 510; water receiving trough 520; baffle 530. DETAILED DESCRIPTION

[0040] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In the description of this utility model, "a plurality" means more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0043] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0044] Air handling units (AHUs), also known as American-style ducted units, are typically installed in attics or basements. They can be assembled from multiple modular boxes, for example, including a heat exchanger and fan box. Alternatively, they can be monolithic, with the heat exchanger and fan components housed within the same box. AHUs can be wall-mounted, with the rear wall of the AHU secured to the wall via a mounting bracket, preventing effective airflow from entering the rear of the AHU. Alternatively, AHUs can be vertical, fixed directly to the ground.

[0045] In order to clearly illustrate the technical solution of the embodiment of the present utility model, the following is an introduction based on a wall-mounted air handling unit. Figure 1 and Figure 2As shown, an air handling unit 1000 according to an embodiment of the present invention includes a housing 100, a fan 200, a heat exchanger 300, a front panel 120, and a refrigerant sensor 400. The housing 100 includes a peripheral wall 110, and the peripheral wall 110 is provided with a mounting opening 111. For example, the housing 100 is square, and the peripheral wall 110 includes a left side wall 112, a right side wall 113, and a rear side wall 114. The left side wall 112, the rear side wall 114, and the right side wall 113 are sequentially connected along the circumference of the housing 100, and the adjacent side walls are arranged at 90°, so that the mounting opening 111 can be formed on the front side of the peripheral wall 110. Alternatively, the peripheral wall 110 may also include a left side wall 112, a right side wall 113, a rear side wall 114, and a front side wall sequentially connected along the circumference of the housing 100, and the mounting opening 111 is provided on the front side wall. The mounting opening 111 is square, which can maximize the exposure of the internal structure of the box 100 and facilitate maintenance and cleaning. In another embodiment, the box 100 can also be cylindrical, elliptical, etc. For the sake of convenience, the following explanations are based on the example of the box 100 being square.

[0046] The fan 200 is installed in the housing 100. The fan 200 can be a centrifugal fan 200 and is fixedly connected to the housing 100. The heat exchanger 300 is installed in the housing 100 and is located below the fan 200. The heat exchanger 300 can be an evaporator or a condenser. For example, when the air handling unit 1000 is cooling, the heat exchanger 300 is used as an evaporator. When the air handling unit 1000 is heating, the heat exchanger 300 is used as a condenser. The front panel 120 is detachably connected to the peripheral wall 110 and covers the mounting port 111. The detachable connection method can be a fastener connection such as screws and bolts, or a snap connection, such as providing a snap buckle on the front panel 120 and providing a slot that cooperates with the snap buckle on the peripheral wall 110. The refrigerant sensor 400 is installed in the housing 100 and is configured so that when the front panel 120 is removed, the refrigerant sensor 400 can be exposed at the mounting port 111. It should be noted that, referring to Figure 3 As shown, the refrigerant sensor 400 can be exposed at the installation opening 111 , which means that after the front panel 120 is opened, at least a portion of the structure of the refrigerant sensor 400 is exposed at the installation opening 111 on a projection surface from front to back.

[0047] It is understandable that, referring to Figure 4As shown, by adopting the above solution, when the fan 200 is in operation, it drives the airflow through the heat exchanger 300, and finally enters the fan 200 and is blown out. When the refrigerant in the heat exchanger 300 leaks, the refrigerant accumulates to a certain concentration and diffuses to other locations in the cabinet 100. Since the refrigerant sensor 400 is located in the cabinet 100, the refrigerant sensor 400 can detect the refrigerant leakage and issue an alarm. Since the refrigerant sensor 400 is exposed at the installation opening 111 after the front panel 120 is removed, the refrigerant sensor 400 can be easily removed and installed, improving maintenance efficiency.

[0048] Reference Figure 2 As shown, in an embodiment of the present invention, the housing 100 further includes a crossbeam 130, which is in the shape of a long strip. The crossbeam 130 is fixedly connected to the middle of the housing 100, and the fixed connection method can be welding, bolts, screws, or other fastener connections, or clamping methods. The crossbeam 130 can increase the overall structural stability of the housing 100, and the refrigerant sensor 400 can also be installed on the crossbeam 130, which is convenient for maintenance personnel to repair or replace. Since the crossbeam 130 is located in the middle of the housing 100 and the electronic control component of the air handling unit 1000 is located in the upper part of the housing 100, the wiring distance between the refrigerant sensor 400 and the electronic control component is shorter, which can save costs.

[0049] It should be noted that the crossbeam 130 being fixedly connected to the middle portion of the box body 100 should be understood as follows: along the height direction of the box body 100, the space from the upper end surface to the lower end surface of the box body 100 is divided into three equal parts, and the space in the middle portion of the box body 100 is the middle portion of the box body 100. The crossbeam 130 only needs to have at least a portion of its structure connected to the middle portion of the box body 100, that is, the crossbeam 130 can have a portion of its structure connected to the middle portion of the box body 100 and another portion of its structure connected to the lower portion of the box body 100; or a portion of its structure connected to the middle portion of the box body 100 and another portion of its structure connected to the upper portion of the box body 100; or the crossbeam 130 can be connected only to the middle portion of the box body 100 and have no connection to the upper or lower portion of the box body 100.

[0050] As an alternative embodiment, the refrigerant sensor 400 may be connected to the inner wall of the box body 100 instead of the crossbeam 130. For example, the refrigerant sensor 400 may be directly connected to the left side wall 112 or the right side wall 113 of the box body 100. The appropriate solution is selected according to the actual situation.

[0051] Reference Figure 2As shown, in the embodiment of the present invention, the peripheral wall 110 is further provided with an air inlet 140, and the air inlet 140 is located below the mounting opening 111. Since the air handling unit is a wall-mounted structure, the air inlet 140 is located at the front side of the box body 100. The crossbeam 130 is fixedly connected to the front end of the peripheral wall 110, and the crossbeam 130 is located between the air inlet 140 and the mounting opening 111, so the refrigerant sensor 400 has little effect on the air intake of the fan 200. The air inlet 140 is located below the mounting opening 111, refer to Figure 4 As shown, under the action of the fan 200, the air flow will enter from the air inlet 140, pass through the heat exchanger 300, and finally enter the interior of the fan 200 through the air suction port 230 of the fan 200, and then be blown out of the box 100. The fan 200 can be a double-suction structure, that is, the air suction port 230 is provided on the front and rear sides of the fan 200. The air suction port 230 on the front side of the fan 200 is set towards the front panel 120, and the air suction port 230 on the rear side is set towards the rear side wall 114. Therefore, the air flow can enter the interior of the fan 200 from the front and rear sides of the fan 200. At the same time, since the refrigerant sensor 400 is located relatively close to the installation port 111, after the front panel 120 is removed, the refrigerant sensor 400 can be disassembled and installed more conveniently, thereby improving maintenance efficiency.

[0052] Reference Figure 3 and Figure 4 As shown, in an embodiment of the present invention, the housing 100 further includes a bottom wall 150, which is fixedly connected to the lower end of the peripheral wall 110. One end of the heat exchanger 300 is connected to the crossbeam 130, and the other end of the heat exchanger 300 is connected to the bottom wall 150, so as to limit the relative position of the heat exchanger 300 and the housing 100 and prevent the heat exchanger 300 from shaking, tilting, and other adverse effects. In the up and down directions, the refrigerant sensor 400 is located on the side of the heat exchanger 300 close to the mounting port 111. Therefore, when the refrigerant in the heat exchanger 300 leaks, it can be detected more quickly by the refrigerant sensor 400, thereby quickly sounding an alarm, thereby improving the safety of the air handling unit 1000.

[0053] Reference Figure 4 As shown, in an embodiment of the present invention, the heat exchanger 300 is configured to be tilted downward in the direction from front to back. For example, one end of the heat exchanger 300 is connected to the crossbeam 130 located at the front end of the peripheral wall 110, and the other end of the heat exchanger 300 is connected to the rear end of the bottom wall 150, so that the heat exchanger 300 is tilted, which can increase the area of the heat exchanger 300 and improve the heat exchange efficiency. The refrigerant sensor 400 is located on the extension line S of the upper end surface of the heat exchanger 300, that is, the extension line S of the upper end surface of the heat exchanger 300 will pass through the refrigerant sensor 400. For example Figure 4The dotted line in the figure is the extension line S. It will be appreciated that the heat exchanger 300 is inclined, so the heat exchanger 300 itself can also play a certain role in guiding the refrigerant, allowing the refrigerant to flow along the upper end surface of the heat exchanger 300 to the refrigerant sensor 400. Furthermore, the refrigerant sensor 400 is located on the extension line S of the upper end surface of the heat exchanger 300, which can more effectively detect refrigerant leaks from the heat exchanger 300, further improving detection efficiency.

[0054] Reference Figure 4 As shown, in an embodiment of the present invention, the air handling unit 1000 further includes a filter assembly 310, which is mounted on the side of the heat exchanger 300 facing the air inlet 140, that is, the filter assembly 310 is located at the lower end of the heat exchanger 300. The filter assembly 310 can block foreign matter and purify the air. The filter assembly 310 can effectively block foreign matter such as dust, hair, and insects in the air from entering the interior of the fan 200, and prevent dust and hair from accumulating on the surface of the heat exchanger 300, causing a decrease in heat exchange efficiency. At the same time, it can also reduce the pollution and wear of the dust fan 200, thereby extending the service life of the air handling unit 1000. At the same time, the air filtered by the filter assembly 310 is cleaner, can reduce bacterial growth, and is beneficial to the physical and mental health of the user.

[0055] Reference Figure 3 and Figure 4 As shown, in an embodiment of the present invention, the filter assembly 310 includes a filter screen 311 that is detachably connected to the housing 100. The detachable connection can be a pull-out design. By providing a disassembly and assembly port 160 below the crossbeam 130, the filter screen 311 is inserted into the housing 100 through the disassembly and assembly port 160 and is tilted in the same direction as the heat exchanger 300. The lower end of the filter screen 311 is limited by the water receiving tray 500 on the bottom wall 150, and the upper end of the filter screen 311 can protrude from the disassembly and assembly port 160. When the filter screen needs to be replaced or cleaned, it can be directly pulled out, which is simple and convenient to operate.

[0056] In an embodiment of the present invention, the filter 311 can be a high-efficiency filter, which is made of high-quality filter materials such as ultra-fine glass fiber paper and has extremely high filtration efficiency. The high-efficiency filter can effectively capture tiny particles in the air, such as dust, pollen, bacteria, viruses, etc., and the filtration efficiency can reach more than 99.97% for particles of 0.3 microns and above. At the same time, the high-efficiency filter focuses on reducing airflow resistance during design to ensure that the airflow can pass smoothly, which not only improves the operating efficiency of the fan 200, but also reduces energy consumption. The filter material and sealing material of the high-efficiency filter have excellent chemical stability and corrosion resistance, so that the filter can maintain a stable working state in various harsh environments.

[0057] Reference Figure 5 As shown, in an embodiment of the present invention, the side plate 320 of the heat exchanger 300 near the crossbeam 130 is sealed to the crossbeam 130 to isolate the mounting opening 111 from the air inlet 140, thereby preventing airflow from directly passing through the space between the heat exchanger 300 and the crossbeam 130 and entering the fan 200. This ensures that airflow passes through the heat exchanger 300 to the maximum extent possible, thereby improving the heat exchange efficiency of the heat exchanger 300. The lower end of the heat exchanger 300 can be sealed to the bottom plate, and the left and right sides of the heat exchanger 300 are sealed to the left wall 112 and the right wall 113, respectively, further preventing airflow from entering the fan 200 without passing through the heat exchanger 300. At the same time, when the air handling unit 1000 is in standby or shutdown mode, that is, when the fan 200 is stopped, refrigerant leakage occurs. Since refrigerant is generally heavier than air, if the heat exchanger 300, the housing 100, and the crossbeam 130 are not sealed, the refrigerant can easily seep out from the gaps between the heat exchanger 300 and the housing 100, and the gaps between the heat exchanger 300 and the crossbeam 130, and cannot pass through the refrigerant sensor 400. As a result, the refrigerant sensor 400 cannot immediately detect the refrigerant leakage, which may lead to a dangerous situation. The high-efficiency filter can play a certain sealing role, which helps to prevent the leaked refrigerant from diffusing downward and flowing out of the air inlet 140.

[0058] Therefore, by providing a sealed connection between the heat exchanger 300, the housing 100, and the crossbeam 130, refrigerant can accumulate above the heat exchanger 300 even when the air handling unit 1000 is in standby or off mode. Once the concentration reaches a certain level, the refrigerant can be quickly detected by the refrigerant sensor 400 as it diffuses upward, improving the detection accuracy of the refrigerant sensor 400 and thus enhancing the safety of the air handling unit 1000.

[0059] In the embodiment of the present invention, the crossbeam 130 is connected to one side wall of the peripheral wall 110. Figure 6 As shown, the crossbeam 130 is connected to the rear side wall 114 of the peripheral wall 110, and the refrigerant sensor 400 is connected to the crossbeam 130. It is understandable that when the air intake 230 of the fan 200 is set toward the rear side wall 114, it is conducive to the air flow passing through the refrigerant sensor 400. When the refrigerant in the heat exchanger 300 leaks, it can also be detected by the refrigerant sensor 400 and an alarm is issued. At the same time, the refrigerant sensor 400 is set on the rear side wall 114, which can facilitate the disassembly and assembly of the fan 200 without removing the refrigerant sensor 400, thereby improving the disassembly and assembly efficiency of the fan 200. Among them, the crossbeam 130 can also be connected to the left side wall 112 or the right side wall 113 of the peripheral wall 110, and the appropriate solution can be selected according to the actual situation.

[0060] Reference Figure 2As shown, in the embodiment of the present invention, the air handling unit 1000 further includes a bracket 410, and the refrigerant sensor 400 is mounted on the crossbeam 130 through the bracket 410. The bracket 410 includes a shielding portion 411, and the shielding portion 411 is located above the refrigerant sensor 400. It is understandable that when the air handling unit 1000 is cooling, condensed water is easily generated inside. For example, referring to Figure 3 As shown, the air handling unit 1000 also includes a pipeline, which is connected to the heat exchanger 300. Among them, the heat exchanger 300 is an evaporator, and the evaporator is connected to the condenser located outdoors through a pipeline. Therefore, condensed water may be generated on the pipeline. When the condensed water drips from the pipeline, it may drip onto the refrigerant sensor 400, which may easily cause the refrigerant sensor 400 to malfunction or reduce the detection accuracy. Therefore, by arranging the shielding portion 411 of the bracket 410 above the refrigerant sensor 400, it is possible to reduce the situation where condensed water drips onto the refrigerant sensor 400, thereby improving the reliability of the refrigerant sensor 400.

[0061] Reference Figure 3 As shown, in the embodiment of the present invention, the peripheral wall 110 includes a left side wall 112 and a right side wall 113 arranged opposite to each other, and the fan 200 includes a volute 210. The air outlet 220 of the volute 210 is located on a side close to the right side wall 113. In the left-right direction, the refrigerant sensor 400 is located on a side close to the right side wall 113. It can be understood that due to the shape of the volute 210, the space on the right side of the volute 210 is larger than the space on the left side of the volute 210 in the housing 100. Therefore, by arranging the refrigerant sensor 400 on a side close to the right side wall 113, the fan 200 can be easily disassembled without disassembling the refrigerant sensor 400, reducing the parts that need to be disassembled, thereby improving the maintenance efficiency of the fan 200.

[0062] Reference Figure 3 As shown, in the embodiment of the present invention, when the refrigerant sensor 400 is located at the front side of the housing 100, the orthographic projection of the fan 200 and the orthographic projection of the refrigerant sensor 400 are staggered on the projection plane from front to back. The staggered arrangement means that the outline of the refrigerant sensor 400 is not within the outer outline of the fan 200. When the refrigerant sensor 400 is located at the rear side of the housing 100, refer to Figure 7 As shown, on the front-to-back projection plane, the orthographic projection of the fan 200 is also offset from the orthographic projection of the refrigerant sensor 400. It is understandable that the refrigerant sensor 400 is also exposed at the installation opening 111, making it easier for maintenance personnel to see the location of the refrigerant sensor 400, thereby facilitating the removal and installation of the refrigerant sensor 400 and improving the maintenance efficiency of the refrigerant sensor 400.

[0063] Reference Figure 8As shown, in an embodiment of the present invention, the bottom wall 150 further includes a water receiving tray 500. The water receiving tray 500 is provided with baffles 530 on both sides along the front-to-back direction. The baffles 530 bend upward, thereby enclosing a water receiving trough 520. The lower end of the heat exchanger 300 is located within the water receiving trough 520. Since the heat exchanger 300 is tilted downward, when condensed water is generated by the heat exchanger 300, the condensed water flows along the heat exchanger 300 into the water receiving trough 520, thereby preventing the condensed water from overflowing and causing leakage in the air handling unit 1000. The lower end of the filter 311 can also be located within the water receiving trough 520, but there is a certain distance from the bottom wall 150 of the water receiving trough 520. Therefore, the baffles 530 of the water receiving trough 520 not only serve as a limit, but also prevent the condensed water from directly contacting the filter 311, thereby reducing the filtering effect.

[0064] To drain the condensed water from the water tray 500, as shown in Figure 7, the water tray 500 is provided with a water outlet connector 510. A drain pipe is connected to the water outlet connector 510, thereby draining the condensed water from the water trough 520 to a suitable location. To improve drainage efficiency, two water outlet connectors 510 can be provided. These two water outlet connectors 510 are arranged side by side, allowing for maximum drainage of the condensed water from the water trough 520. Furthermore, if one of the water outlet connectors 510 becomes clogged, the other water outlet connector 510 can still function as a drain, effectively preventing condensed water from overflowing the water tray 500 and improving the reliability of the air handling unit 1000.

[0065] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. Air handling unit, characterized in that, include: The box body includes a peripheral wall, wherein the peripheral wall is provided with a mounting opening; A fan is installed in the box; a heat exchanger, installed in the box and located below the fan; a front panel, detachably connected to the peripheral wall and covering the installation opening; The refrigerant sensor is installed in the box and is configured to be exposed at the installation opening when the front panel is removed.

2. The air handling unit according to claim 1, characterized in that: The box body further comprises a crossbeam fixedly connected to the middle portion of the box body.

3. The air handling unit according to claim 2, characterized in that: The peripheral wall is further provided with an air inlet, which is located below the mounting opening. The crossbeam is fixedly connected to the front end of the peripheral wall and is located between the air inlet and the mounting opening.

4. The air handling unit according to claim 3, characterized in that: The box body also includes a bottom wall connected to the peripheral wall, one end of the heat exchanger is connected to the crossbeam, and the other end of the heat exchanger is connected to the bottom wall; along the up and down directions, the refrigerant sensor is located on the side of the heat exchanger close to the installation port.

5. The air handling unit according to claim 4, characterized in that: The heat exchanger is configured to be tilted downward in a direction from front to rear, and the refrigerant sensor is located on an extension line of an upper end surface of the heat exchanger.

6. The air handling unit according to claim 4, characterized in that: The side plate of the heat exchanger close to the crossbeam is sealed and connected to the crossbeam to isolate the installation port and the air inlet.

7. The air handling unit according to claim 2, characterized in that: The crossbeam is connected to one side wall of the peripheral wall.

8. The air handling unit according to any one of claims 2 to 7, characterized in that: The refrigerant sensor is installed on the crossbeam.

9. The air handling unit according to claim 8, characterized in that: The air handling unit further includes a bracket, the refrigerant sensor is mounted on the crossbeam via the bracket, the bracket includes a shielding portion, and the shielding portion is located above the refrigerant sensor.

10. The air handling unit according to any one of claims 1 to 7, characterized in that: The peripheral wall includes a left wall and a right wall arranged opposite to each other, the fan includes a volute, the air outlet of the volute is located on a side close to the right wall, and the refrigerant sensor is located on a side close to the right wall along the left-right direction.

11. The air handling unit according to any one of claims 1 to 7, characterized in that: On the projection surface from front to back, the orthographic projection of the fan and the orthographic projection of the refrigerant sensor are staggered.

12. The air handling unit according to claim 1, characterized in that: The peripheral wall is further provided with an air inlet, which is located below the mounting opening. The air handling unit further comprises a filter assembly, which is mounted on a side of the heat exchanger facing the air inlet.

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