Attic room air conditioner

Abstract

The utility model provides a kind of attic indoor unit and air conditioner, attic indoor unit includes shell, fan and heat exchanger, the lower end surface of shell is equipped with air inlet and multiple air outlets, multiple air outlets are evenly distributed around the outer periphery of air inlet, heat exchanger is open ring extension around the outer periphery of air inlet, heat exchanger includes the inner row ring device and outer row ring device independently arranged side by side in horizontal direction, outer row ring device is located in the side of inner row ring device away from air inlet, the inner inlet and inner row outlet of inner row ring device are located in the first end of inner row ring device in the circumferential direction of air inlet, the outer inlet and outer row outlet of outer row ring device are located in the second end of outer row ring device in the circumferential direction of air inlet.The utility model attic indoor unit can realize circumferential air outlet temperature uniformity without additional air supply structure, to improve heat exchange effect and heat exchange efficiency, to improve user comfort experience, and simplify structure, reduce production cost, and reduce operating energy consumption, to realize energy-saving purpose.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner technology, and in particular to a ceiling-mounted indoor unit and an air conditioner having the ceiling-mounted indoor unit. Background Technology

[0002] A ceiling-mounted indoor unit, also known as a ceiling-mounted or recessed air conditioning unit, is embedded or suspended in the ceiling, saving space. It is commonly found in commercial spaces such as offices, shopping malls, and restaurants, as well as large areas like family living rooms. The air inlet of the ceiling-mounted indoor unit is located in the center of the panel, surrounded by air outlets. The heat exchanger of the ceiling-mounted indoor unit is arranged in a ring or square around the air inlet. This allows the airflow entering the ceiling-mounted indoor unit from the center of the panel to undergo heat exchange, and the heated airflow is then delivered into the room through the surrounding air outlets to regulate indoor air quality.

[0003] However, in existing ceiling-style indoor units, the inlet and outlet of the heat exchanger are located on the same end of the heat exchanger in the circumferential direction of the air inlet. Because the overall size of the heat exchanger arranged around the outer periphery of the air inlet is relatively long, the refrigerant traveling within the heat exchanger has a longer path. As a result, the heat exchange effect is better in the area near the heat exchanger inlet, while the heat exchange effect is poor in the area far away from the heat exchanger inlet. As the refrigerant path gradually lengthens, the heat exchange effect gradually deteriorates, leading to uneven air outlet temperature around the air inlet. This results in uneven air outlet temperature around the ceiling-style indoor unit, affecting the uniformity of indoor air temperature, heat exchange effect, and heat exchange efficiency, and ultimately impacting user comfort.

[0004] To ensure uniform air temperature around the ceiling unit, current methods involve improving the air supply method to accelerate indoor air circulation and increase indoor space agitation for rapid heat exchange, thereby improving indoor air temperature uniformity. However, improving the air supply method of the ceiling unit requires additional air supply structures, such as air guide structures and air sweeping structures, which complicates the structure at the air outlet of the ceiling unit, increases production costs, and further increases the operating energy consumption of the ceiling unit. Utility Model Content

[0005] To achieve the primary objective of this utility model, it provides a ceiling-mounted indoor unit that can achieve uniform circumferential air outlet temperature without the need for additional air supply structures, thereby improving heat exchange effect and efficiency, enhancing user comfort, simplifying structure, reducing production costs, and lowering operating energy consumption, thus achieving energy saving.

[0006] To achieve the second objective of this utility model, this utility model provides an air conditioner having the above-mentioned ceiling indoor unit.

[0007] To achieve the first objective of this utility model, this utility model provides a ceiling-mounted indoor unit, including a casing, a fan, and a heat exchanger. An air inlet is provided in the center of the lower end face of the casing, and multiple air outlets are provided on the lower end face of the casing. The multiple air outlets are evenly distributed around the outer periphery of the air inlet. The fan is located inside the casing and is positioned corresponding to the air inlet. The heat exchanger is located inside the casing and between the air inlet and the air outlets, extending in an open ring around the outer periphery of the air inlet. The heat exchanger includes an inner exhaust ring and an outer exhaust ring arranged independently side-by-side in the horizontal direction. The outer exhaust ring is located on the side of the inner exhaust ring away from the air inlet. The inner inlet and inner outlet of the inner exhaust ring are located at the first end of the inner exhaust ring in the circumferential direction of the air inlet, and the outer inlet and outer outlet of the outer exhaust ring are located at the second end of the outer exhaust ring in the circumferential direction of the air inlet. The first end of the inner exhaust ring and the second end of the outer exhaust ring are respectively the two ends of the heat exchanger in the circumferential direction of the air inlet.

[0008] During the heat exchange operation of this utility model's ceiling-mounted indoor unit, under the action of the fan, indoor airflow enters the unit casing from the air inlet, undergoes heat exchange through the heat exchanger, and the heat-exchanged airflow is then sent into the room through multiple circumferentially evenly distributed air outlets to regulate the indoor air heat. This utility model's heat exchanger includes an inner exhaust ring and an outer exhaust ring arranged side-by-side independently in the horizontal direction. The outer exhaust ring is located on the side of the inner exhaust ring away from the air inlet. The inner inlet and inner outlet of the inner exhaust ring are located at the first end of the inner exhaust ring in the circumferential direction of the air inlet, and the outer inlet and outer outlet of the outer exhaust ring are located at the second end of the outer exhaust ring in the circumferential direction of the air inlet. The first end of the inner exhaust ring and... The second ends of the external exhaust ring are the two ends of the heat exchanger in the circumferential direction of the air inlet, so that the refrigerant flow direction of the external exhaust ring and the internal exhaust ring is opposite. Since the area near the inner inlet of the internal exhaust ring corresponds to the area far away from the outer inlet of the external exhaust ring, and the area far away from the inner inlet of the internal exhaust ring corresponds to the area near the outer inlet of the external exhaust ring, the internal exhaust ring and the external exhaust ring achieve uniform heat exchange and complementarity in the circumferential direction of the air inlet. This makes the outlet air temperature in the circumferential direction of the air inlet more consistent, so as to avoid the uneven phenomenon of different outlet air temperatures caused by different distances from the refrigerant inlet in the circumferential direction of the heat exchanger in the circumferential direction of the air inlet.

[0009] Compared to existing methods that require additional air supply structures to accelerate indoor air circulation, this new type of patio indoor unit simply separates the existing integrated heat exchanger into two independently arranged inner and outer exhaust rings horizontally. The inner inlet of the inner exhaust ring and the outer inlet of the outer exhaust ring are respectively located at opposite ends of the heat exchanger's air inlet circumferentially. Therefore, circumferential air outlet temperature uniformity can be achieved without adding an additional air supply structure, improving indoor air temperature uniformity, heat exchange effect, and efficiency, thereby enhancing user comfort. Furthermore, the simple structure of this new patio indoor unit reduces production costs and eliminates the need for additional air supply structures, thus reducing the unit's operating energy consumption and achieving energy savings.

[0010] Therefore, the indoor unit of this utility model can achieve uniform circumferential air temperature without the need for additional air supply structure, thereby improving heat exchange effect and efficiency, thus enhancing user comfort experience. It also simplifies the structure, reduces production costs, and lowers operating energy consumption, thereby achieving energy saving.

[0011] A further embodiment is that the inner drain ring device includes at least two sets of first single-row copper tubes, and multiple sets of first single-row copper tubes are arranged side by side in the vertical direction, each set of first single-row copper tubes having an inner inlet and an inner outlet; and / or, the outer drain ring device includes at least two sets of second single-row copper tubes, and multiple sets of second single-row copper tubes are arranged side by side in the vertical direction, each set of second single-row copper tubes having an outer inlet and an outer outlet.

[0012] A further proposed solution is that the indoor unit of the ceiling includes a splitter, an inlet main pipe, and an outlet main pipe. An internal inlet is connected to an outlet of the splitter, and an external inlet is connected to an outlet of the splitter. The inlet of the splitter is connected to the first end of the inlet main pipe, and the second end of the inlet main pipe extends out of the casing. The internal outlet and the external outlet are respectively connected to the first end of the outlet main pipe, and the second end of the outlet main pipe extends out of the casing.

[0013] A further embodiment is that the ceiling indoor unit also includes a first insulation sleeve, which is fitted onto the outer periphery of the main inlet pipe and passes through the peripheral wall of the casing; and / or, the ceiling indoor unit also includes a second insulation sleeve, which is fitted onto the outer periphery of the exhaust main pipe and passes through the peripheral wall of the casing.

[0014] A further embodiment includes a protective bottom ring located at the lower end of the heat exchanger. The upper middle part of the protective bottom ring has a first protruding ring protruding upwards, and the inner side of the protective bottom ring near the air inlet has a first limiting plate protruding upwards. The outer side of the protective bottom ring away from the air inlet has a second limiting plate protruding upwards. The first protruding ring is inserted into the gap between the inner and outer exhaust rings. The lower end of the inner exhaust ring is located in the first limiting groove formed between the first protruding ring and the first limiting plate, and the lower end of the outer exhaust ring is located in the second limiting groove formed between the first protruding ring and the second limiting plate.

[0015] A further design includes a protective top ring in the ceiling-mounted indoor unit. The protective top ring is located at the upper end of the heat exchanger. A second protruding ring is provided at the lower middle of the protective top ring, and a third limiting plate is provided at the inner side of the protective top ring near the air inlet, while a fourth limiting plate is provided at the outer side of the protective top ring away from the air inlet. The second protruding ring is inserted into the gap. The upper end of the inner exhaust ring is located in the third limiting groove formed between the second protruding ring and the third limiting plate, and the upper end of the outer exhaust ring is located in the fourth limiting groove formed between the second protruding ring and the fourth limiting plate.

[0016] A further option is that the ceiling indoor unit also includes a mounting bracket, with the lower end of the bracket connected to a protective bottom ring and the upper end of the bracket connected to the upper surface of the unit casing.

[0017] A further option is that the lower end of the mounting bracket is provided with a slot, and the protective bottom ring is engaged in the slot; and / or, the mounting bracket is provided with a through hole, which is corresponding to the heat exchanger.

[0018] A further option is that the ceiling indoor unit also includes a baffle plate, which is connected between the two ends of the heat exchanger in the circumferential direction of the air inlet and is located close to the air inlet; and / or, the two ends of the heat exchanger in the circumferential direction of the air inlet are located between two adjacent air outlets.

[0019] A further design includes a baffle ring in the ceiling-mounted indoor unit. The baffle ring is located inside the housing and between the air inlet and the fan. The baffle ring includes an inclined ring section, an arc-shaped ring section and a straight ring section connected in sequence. The inclined ring section is located close to the air inlet and is inclined inward from the air inlet toward the fan. The straight ring section extends axially from the air inlet.

[0020] A further option is to include a drip tray in the ceiling-mounted indoor unit, which is located inside the casing and below the heat exchanger.

[0021] A further design includes an insulation ring in the ceiling-mounted indoor unit. The insulation ring is located inside the casing and extends adjacent to the peripheral wall of the casing, surrounding the outer perimeter of multiple air outlets.

[0022] To achieve the second objective of this utility model, this utility model provides an air conditioner, including a ceiling indoor unit, wherein the ceiling indoor unit is the aforementioned ceiling indoor unit. Attached Figure Description

[0023] Figure 1 This is a first-view structural diagram of an embodiment of the ceiling indoor unit of this utility model.

[0024] Figure 2 This is a second-view structural diagram of an embodiment of the ceiling indoor unit of this utility model.

[0025] Figure 3 This is a partial structural diagram of an embodiment of the ceiling-mounted indoor unit of this utility model.

[0026] Figure 4 This is an exploded view of an embodiment of the ceiling-mounted indoor unit of this utility model.

[0027] Figure 5 This is a bottom view of an embodiment of the ceiling indoor unit of this utility model.

[0028] Figure 6 yes Figure 5 Sectional view at AA.

[0029] Figure 7 yes Figure 6 Enlarged view at point B.

[0030] Figure 8 yes Figure 6 Enlarged view at point C.

[0031] Figure 9 This is a structural diagram showing the assembly of the heat exchanger, protective bottom ring, and protective top ring in an embodiment of the ceiling-mounted indoor unit of this utility model.

[0032] Figure 10 This is an exploded view showing the assembly of the heat exchanger, protective bottom ring, protective top ring, fixing bracket, and wind deflector in an embodiment of the ceiling-mounted indoor unit of this utility model.

[0033] Figure 11 This is a structural diagram showing the combination of the heat exchanger, the first insulation sleeve, and the second insulation sleeve in an embodiment of the ceiling indoor unit of this utility model.

[0034] Figure 12 yes Figure 11 Sectional view at DD.

[0035] Figure 13 yes Figure 11 Sectional view at EE.

[0036] Figure 14 This is a structural diagram of the heat exchanger in an embodiment of the ceiling-mounted indoor unit of this utility model.

[0037] Figure 15 This is a structural diagram of the protective bottom ring and fixing frame in an embodiment of the ceiling indoor unit of this utility model.

[0038] Figure 16 This is a structural diagram of the fixing frame in an embodiment of the ceiling indoor unit of this utility model.

[0039] Figure 17 This is a structural diagram of the protective top ring in an embodiment of the ceiling indoor unit of this utility model.

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0041] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present invention or its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0042] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not exist between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may not be directly connected to the other devices but may have an intermediary device.

[0044] All terms used in this invention (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0045] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0046] See Figures 1 to 17 In this embodiment, the ceiling indoor unit 100 includes a housing 11, a fan 14, and a heat exchanger 19. An air inlet 111 is provided in the middle of the lower end face of the housing 11, and multiple air outlets 112 are provided in the lower end face of the housing 11. The multiple air outlets 112 are evenly distributed around the outer periphery of the air inlet 111. The fan 14 is located inside the housing 11 and is arranged corresponding to the air inlet 111. The heat exchanger 19 is located inside the housing 11 and is located between the air inlet 111 and the air outlets 112. The heat exchanger 19 extends in an open ring around the outer periphery of the air inlet 111.

[0047] Furthermore, in this embodiment, the heat exchanger 19 includes an inner exhaust ring 191 and an outer exhaust ring 192 arranged side by side independently in the horizontal direction. The outer exhaust ring 192 is located on the side of the inner exhaust ring 191 away from the air inlet 111. The inner inlet 1912 and the inner outlet 1913 of the inner exhaust ring 191 are located at the first end of the inner exhaust ring 191 in the circumferential direction of the air inlet 111. The outer inlet 1922 and the outer outlet 1923 of the outer exhaust ring 192 are located at the second end of the outer exhaust ring 192 in the circumferential direction of the air inlet 111. The first end of the inner exhaust ring 191 and the second end of the outer exhaust ring 192 are the two ends of the heat exchanger 19 in the circumferential direction of the air inlet 111, respectively.

[0048] Therefore, in this embodiment, during the heat exchange operation of the ceiling indoor unit 100, under the action of the fan 14, the indoor airflow enters the casing 11 from the air inlet 111 and undergoes heat exchange through the heat exchanger 19. The heat-exchanged airflow is then sent into the room through multiple circumferentially distributed air outlets 112 to regulate the indoor air heat exchange. In this embodiment, the heat exchanger 19 includes an inner exhaust ring 191 and an outer exhaust ring 192 arranged side-by-side independently in the horizontal direction. The outer exhaust ring 192 is located on the side of the inner exhaust ring 191 away from the air inlet 111. The inner inlet 1912 and inner outlet 1913 of the inner exhaust ring 191 are located at the first end of the inner exhaust ring 191 in the circumferential direction of the air inlet 111. The outer inlet 1922 and outer outlet 1923 of the outer exhaust ring 192 are located at the second end of the outer exhaust ring 192 in the circumferential direction of the air inlet 111. The first end of 1 and the second end of the external exhaust ring 192 are the two ends of the heat exchanger 19 in the circumferential direction of the air inlet 111, so that the refrigerant flow direction of the external exhaust ring 192 and the internal exhaust ring 191 is opposite. Since the area near the inner inlet 1912 of the internal exhaust ring 191 corresponds to the area far away from the outer inlet 1922 of the external exhaust ring 192, and the area far away from the inner inlet 1912 of the internal exhaust ring 191 corresponds to the area near the outer inlet 1922 of the external exhaust ring 192, the internal exhaust ring 191 and the external exhaust ring 192 achieve uniform heat exchange and complementarity in the circumferential direction of the air inlet 111, so that the outlet air temperature in the circumferential direction of the air inlet 111 tends to be consistent, so as to avoid the uneven phenomenon of different outlet air temperature in the circumferential direction of the heat exchanger 19 due to different distances from the refrigerant inlet in the circumferential direction of the air inlet 111.

[0049] Compared to existing methods that require additional air supply structures to accelerate indoor air circulation, the ceiling-mounted indoor unit 100 in this embodiment only needs to split the existing integrated heat exchanger 19 into an inner exhaust ring 191 and an outer exhaust ring 192, which are independently arranged side by side in the horizontal direction. The inner inlet 1912 of the inner exhaust ring 191 and the outer inlet 1922 of the outer exhaust ring 192 are respectively located at opposite ends of the heat exchanger 19 around the air inlet 111. Therefore, circumferential air outlet temperature uniformity can be achieved without adding an additional air supply structure, thereby improving the uniformity of indoor air temperature, enhancing heat exchange effect and efficiency, and ultimately improving user comfort. Furthermore, the ceiling-mounted indoor unit 100 in this embodiment has a simple structure, reducing production costs and eliminating the need for additional air supply structures, thus reducing the operating energy consumption of the ceiling-mounted indoor unit 100 and achieving energy saving.

[0050] Therefore, the ceiling indoor unit 100 in this embodiment can achieve circumferential air outlet temperature uniformity without the need for additional air supply structure, thereby improving heat exchange effect and efficiency, enhancing user comfort experience, simplifying structure, reducing production costs, and reducing operating energy consumption, thus achieving energy saving.

[0051] Specifically, in this embodiment, the fan 14 is a centrifugal fan. Furthermore, the ceiling-mounted indoor unit 100 in this embodiment also includes a water collection tray 22, which is located inside the casing 11 and below the heat exchanger 19, for collecting the condensate generated by the heat exchanger 19 and discharging it to the outside of the ceiling-mounted indoor unit 100.

[0052] Combination Figures 8 to 14 In this embodiment, the internal exhaust ring device 191 includes at least two sets of first single-row copper tubes 1911, and multiple sets of first single-row copper tubes 1911 are arranged side by side in the vertical direction. Each set of first single-row copper tubes 1911 has an internal inlet 1912 and an internal outlet 1913, thereby giving the internal exhaust ring device 191 multiple heat exchange flow paths and improving the heat exchange capacity of the internal exhaust ring device 191. In addition, in this embodiment, the external exhaust ring device 192 includes at least two sets of second single-row copper tubes 1921, and multiple sets of second single-row copper tubes 1921 are arranged side by side in the vertical direction. Each set of second single-row copper tubes 1921 has an external inlet 1922 and an external outlet 1923, thereby giving the external exhaust ring device 192 multiple heat exchange flow paths and improving the heat exchange capacity of the external exhaust ring device 192, so as to improve the overall heat exchange capacity of the ceiling indoor unit 100.

[0053] Specifically, in this embodiment, the ceiling indoor unit 100 includes a distributor 122, an inlet main pipe 12, and an outlet main pipe 13. An internal inlet 1912 is connected to an outlet of the distributor 122, and an external inlet 1922 is connected to an outlet of the distributor 122. The inlet of the distributor 122 is connected to the first end of the inlet main pipe 12, and the second end of the inlet main pipe 12 extends out of the housing 11. The internal outlet 1913 and the external outlet 1923 are respectively connected to the first end of the outlet main pipe 13, and the second end of the outlet main pipe 13 extends out of the housing 11.

[0054] To achieve insulation and improve the heat exchange effect of the ceiling indoor unit 100, this embodiment of the ceiling indoor unit 100 further includes a first insulation sleeve 121. The first insulation sleeve 121 is fitted onto the outer periphery of the inlet main pipe 12 and passes through the peripheral wall of the casing 11 to prevent heat leakage from occurring through the gap between the inlet main pipe 12 and the peripheral wall of the casing 11. Furthermore, this embodiment of the ceiling indoor unit 100 also includes a second insulation sleeve 131. The second insulation sleeve 131 is fitted onto the outer periphery of the outlet main pipe 13 and passes through the peripheral wall of the casing 11 to prevent heat leakage from occurring through the gap between the outlet main pipe 13 and the peripheral wall of the casing 11. Specifically, in this embodiment, the first insulation sleeve 121 and the second insulation sleeve 131 are made of insulation cotton.

[0055] To further enhance the heat exchange effect of the ceiling indoor unit 100 and achieve better insulation, this embodiment of the ceiling indoor unit 100 also includes an insulation ring 15. The insulation ring 15 is located inside the casing 11 and extends adjacent to the peripheral wall of the casing 11, surrounding the outer periphery of the multiple air outlets 112 to prevent heat loss from occurring on the peripheral wall of the casing 11. Specifically, in this embodiment, the insulation ring 15 is made of insulating foam.

[0056] Combination Figures 15 to 17 In this embodiment, the ceiling indoor unit 100 also includes a protective bottom ring 17. The protective bottom ring 17 is located at the lower end of the heat exchanger 19. A first protruding ring 171 is provided at the upper middle part of the protective bottom ring 17, and a first limiting plate 172 is provided at the inner side of the protective bottom ring 17 near the air inlet 111. A second limiting plate 173 is provided at the outer side of the protective bottom ring 17 away from the air inlet 111. The first protruding ring 171 is inserted into the gap between the inner exhaust ring device 191 and the outer exhaust ring device 192. The lower end of the inner exhaust ring device 191 is located in the first limiting groove formed between the first protruding ring 171 and the first limiting plate 172. The lower end of the outer exhaust ring device 192 is located in the second limiting groove formed between the first protruding ring 171 and the second limiting plate 173.

[0057] In this embodiment, a gap is reserved between the inner exhaust ring 191 and the outer exhaust ring 192 of the heat exchanger 19. The gap is between 2 mm and 5 mm to prevent the fins of the inner exhaust ring 191 and the outer exhaust ring 192 from rubbing against each other and causing problems such as fin tipping due to the distance between them being too close during installation. At the same time, it also makes the installation of the inner exhaust ring 191 and the outer exhaust ring 192 easier. Furthermore, in this embodiment, the first protruding ring 171 of the protective bottom ring 17 is inserted into the gap between the inner ring drainer 191 and the outer ring drainer 192 to separate the lower ends of the inner ring drainer 191 and the outer ring drainer 192, and to control the stability of the gap between the inner ring drainer 191 and the outer ring drainer 192. Moreover, in this embodiment, the lower end of the inner ring drainer 191 is located in the first limiting groove formed between the first protruding ring 171 of the protective bottom ring 17 and the first limiting plate 172 of the protective bottom ring 17, and the lower end of the outer ring drainer 192 is located in the second limiting groove formed between the first protruding ring 171 of the protective bottom ring 17 and the second limiting plate 173 of the protective bottom ring 17, so as to position the lower ends of the inner ring drainer 191 and the outer ring drainer 192, and prevent relative displacement between the inner ring drainer 191 and the outer ring drainer 192 or collision during transportation. Specifically, in this embodiment, the first limiting groove and the second limiting groove are designed with a structure that is wider at the top and narrower at the bottom, so that the lower end of the inner ring drainer 191 can be inserted into the first limiting groove for limiting, and the lower end of the outer ring drainer 192 can be inserted into the second limiting groove for limiting, thereby improving the ease of installation.

[0058] To further improve the installation stability between the inner exhaust ring 191 and the outer exhaust ring 192, the ceiling indoor unit 100 in this embodiment also includes a protective top ring 16. The protective top ring 16 is located at the upper end of the heat exchanger 19. A second protruding ring 161 is provided with a downward protrusion at the middle of the lower end of the protective top ring 16. A third limiting plate 162 is provided with a downward protrusion on the inner side of the protective top ring 16 near the air inlet 111, and a fourth limiting plate 163 is provided with a downward protrusion on the outer side of the protective top ring 16 away from the air inlet 111. The second protruding ring 161 is inserted into the gap between the inner exhaust ring 191 and the outer exhaust ring 192 to separate them. The upper ends of the inner ring drainer 191 and the outer ring drainer 192 are positioned to control the stability of the gap between them. In this embodiment, the upper end of the inner ring drainer 191 is located in the third limiting groove formed between the second convex ring 161 and the third limiting plate 162, and the upper end of the outer ring drainer 192 is located in the fourth limiting groove formed between the second convex ring 161 and the fourth limiting plate 163. This positioning helps to prevent relative displacement between the inner and outer ring drainers 191 and 192 or collisions during transportation. Specifically, the third and fourth limiting grooves are designed with a wider bottom and narrower top structure, facilitating the insertion of the upper end of the inner ring drainer 191 into the third limiting groove for positioning and the insertion of the upper end of the outer ring drainer 192 into the fourth limiting groove for positioning, thus improving ease of installation.

[0059] To securely install the heat exchanger 19, the ceiling-mounted indoor unit 100 described in this embodiment also includes a mounting bracket 18. The lower end of the mounting bracket 18 is connected to a protective bottom ring 17, and the upper end of the mounting bracket 18 is connected to the upper surface of the casing 11. Specifically, the lower end of the mounting bracket 18 in this embodiment is provided with a slot 182, and the protective bottom ring 17 is engaged in the slot 182 to improve installation ease. Furthermore, the mounting bracket 18 in this embodiment has a through hole 181, which corresponds to the heat exchanger 19, avoiding large-area obstruction of the heat exchanger 19 and thus improving the heat exchange performance of the heat exchanger 19.

[0060] To prevent indoor airflow entering the casing 11 from the air inlet 111 from bypassing heat exchanger 19 and instead flowing directly out through the two circumferential ports of the heat exchanger 19 to the air outlet 112, thus reducing heat exchange efficiency, this embodiment of the ceiling-mounted indoor unit 100 also includes a baffle plate 20. The baffle plate 20 is connected between the two circumferential ports of the heat exchanger 19 at the air inlet 111 and is positioned close to the air inlet 111, thereby blocking airflow from passing through the two circumferential ports of the heat exchanger 19 at the air inlet 111, thereby improving heat exchange performance. Specifically, in this embodiment, the two circumferential ports of the heat exchanger 19 at the air inlet 111 are located between two adjacent air outlets 112 to avoid affecting the uniformity of the outlet air temperature at the air outlet 112.

[0061] Both the protective bottom ring 17 and the protective top ring 16 are made of sheet metal. During installation, the lower ends of the inner exhaust ring 191 and the outer exhaust ring 192 of the heat exchanger 19 are first inserted into the protective bottom ring 17, and then the protective top ring 16 is installed on the upper ends of the inner exhaust ring 191 and the outer exhaust ring 192 of the heat exchanger 19. The baffle plate 20 is fixed at the two ends of the heat exchanger 19 in the circumferential direction of the air inlet 111, so that the relative positions of the inner exhaust ring 191 and the outer exhaust ring 192 of the heat exchanger 19 are fixed and there will be no relative displacement or shaking. Then the connecting pipes and other structures are welded. Since the inner exhaust ring 191 and the outer exhaust ring 192 are fixed at this time, they can be regarded as a whole heat exchanger 19, making welding easier and more convenient. The baffle plate 20 serves two purposes: firstly, it fixes the heat exchanger 19 at both ends of the air inlet 111 in the circumferential direction, and secondly, it blocks the airflow. Since the heat exchanger 19 needs to leave space for welding connecting pipes, the two ends of the heat exchanger 19 at the air inlet 111 in the circumferential direction cannot be made into a closed ring, leaving a gap. This gap cannot be used for heat exchange. The function of the baffle plate 20 is to prevent the airflow from directly reaching the air outlet 112 through this gap, which would lead to low heat exchange efficiency.

[0062] Combination Figure 6 and Figure 7 In this embodiment, the ceiling indoor unit 100 also includes a guide ring 21. The guide ring 21 is located inside the casing 11 and between the air inlet 111 and the fan 14. The guide ring 21 includes an inclined ring section 211, an arc-shaped ring section 212 and a straight ring section 213 connected in sequence. The inclined ring section 211 is set close to the air inlet 111 and is inclined inward from the air inlet 111 toward the fan 14. The straight ring section 213 extends axially in the air inlet 111, so that the airflow entering the casing 11 from the air inlet 111 can be uniformly and smoothly gathered and pressurized from the inclined ring section 211 of the guide ring 21 toward the straight ring section 213 of the guide ring 21, and quickly and smoothly sent out from the straight ring section 213 of the guide ring 21 to the air inlet of the fan 14. This can reduce wind resistance noise, thereby helping to reduce noise, and has a gathering and pressurizing effect, thereby improving heat exchange efficiency.

[0063] The above embodiments are merely preferred examples of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. A ceiling-mounted indoor unit, comprising a casing, a fan, and a heat exchanger, wherein an air inlet is provided at the center of the lower end face of the casing, and multiple air outlets are provided on the lower end face of the casing, the multiple air outlets being evenly distributed around the outer periphery of the air inlet; the fan is located inside the casing and correspondingly arranged to the air inlet; the heat exchanger is located inside the casing and between the air inlet and the air outlets, and the heat exchanger extends in an open ring around the outer periphery of the air inlet, characterized in that: The heat exchanger includes an inner exhaust ring and an outer exhaust ring arranged side by side independently in a horizontal direction. The outer exhaust ring is located on the side of the inner exhaust ring away from the air inlet. The inner inlet and inner outlet of the inner exhaust ring are located at the first end of the inner exhaust ring in the circumferential direction of the air inlet. The outer inlet and outer outlet of the outer exhaust ring are located at the second end of the outer exhaust ring in the circumferential direction of the air inlet. The first end of the inner exhaust ring and the second end of the outer exhaust ring are respectively the two ends of the heat exchanger in the circumferential direction of the air inlet.

2. The ceiling-mounted indoor unit according to claim 1, characterized in that: The inner drain ring device includes at least two sets of first single-row copper tubes, and multiple sets of first single-row copper tubes are arranged side by side in the vertical direction. Each set of first single-row copper tubes has the inner inlet and the inner drain outlet. And / or, the external drain ring includes at least two sets of second single-row copper tubes, multiple sets of second single-row copper tubes are arranged side by side in the vertical direction, and each set of second single-row copper tubes has the external inlet and the external outlet.

3. The ceiling-mounted indoor unit according to claim 2, characterized in that: The indoor unit of the ceiling includes a splitter, an inlet main pipe and an outlet main pipe. One of the internal inlets is connected to one outlet of the splitter, and one of the external inlets is connected to one outlet of the splitter. The inlet of the splitter is connected to the first end of the inlet main pipe, and the second end of the inlet main pipe extends out of the unit casing. The inner outlet and the outer outlet are respectively connected to the first end of the outer outlet main pipe, and the second end of the outer outlet main pipe extends out of the machine casing.

4. The atrium indoor unit according to claim 3, characterized in that: The indoor unit of the atrium also includes a first insulation sleeve, which is sleeved on the outer periphery of the main inlet pipe and passes through the peripheral wall of the unit casing; And / or, the indoor unit of the atrium also includes a second insulation sleeve, which is fitted onto the outer periphery of the main exhaust pipe and passes through the peripheral wall of the unit casing.

5. The ceiling-mounted indoor unit according to claim 1, characterized in that: The ceiling indoor unit also includes a protective bottom ring, which is located at the lower end of the heat exchanger. The upper middle part of the protective bottom ring has a first protruding ring protruding upward, and the inner side of the protective bottom ring near the air inlet has a first limiting plate protruding upward, and the outer side of the protective bottom ring away from the air inlet has a second limiting plate protruding upward. The first convex ring is inserted into the gap between the inner ring drainer and the outer ring drainer. The lower end of the inner ring drainer is located in the first limiting groove formed between the first convex ring and the first limiting plate, and the lower end of the outer ring drainer is located in the second limiting groove formed between the first convex ring and the second limiting plate.

6. The atrium indoor unit according to claim 5, characterized in that: The ceiling indoor unit also includes a protective top ring, which is located at the upper end of the heat exchanger. A second protruding ring is provided at the lower middle part of the protective top ring, and a third limiting plate is provided at the inner side of the protective top ring near the air inlet, and a fourth limiting plate is provided at the outer side of the protective top ring away from the air inlet. The second convex ring is inserted into the gap, the upper end of the inner ring discharger is located in the third limiting groove formed between the second convex ring and the third limiting plate, and the upper end of the outer ring discharger is located in the fourth limiting groove formed between the second convex ring and the fourth limiting plate.

7. The atrium indoor unit according to claim 5, characterized in that: The indoor unit of the ceiling also includes a mounting bracket, the lower end of which is connected to the protective bottom ring, and the upper end of which is connected to the upper surface of the housing.

8. The atrium indoor unit according to claim 7, characterized in that: The lower end of the fixing frame is provided with a slot, and the protective bottom ring is engaged in the slot; And / or, the fixing frame has a through hole, which is corresponding to the heat exchanger.

9. The ceiling-mounted indoor unit according to claim 1, characterized in that: The indoor unit of the atrium also includes a baffle plate, which is connected between the two ends of the heat exchanger in the circumferential direction of the air inlet and is located close to the air inlet. And / or, the heat exchanger is located at both ends of the air inlet in the circumferential direction between two adjacent air outlets.

10. The ceiling-mounted indoor unit according to claim 1, characterized in that: The indoor unit of the ceiling also includes a guide ring, which is located inside the housing and between the air inlet and the fan. The guide ring includes an inclined ring segment, an arc-shaped ring segment and a straight ring segment connected in sequence. The inclined ring segment is located close to the air inlet and is inclined inward from the air inlet toward the fan. The straight ring segment extends axially from the air inlet.

11. The ceiling-mounted indoor unit according to claim 1, characterized in that: The indoor unit of the ceiling also includes a water collection tray, which is located inside the casing and below the heat exchanger.

12. The atrium indoor unit according to any one of claims 1 to 11, characterized in that: The indoor unit of the ceiling also includes a heat preservation ring, which is located inside the housing and extends adjacent to the peripheral wall of the housing and surrounds the outer periphery of the plurality of air outlets.

13. An air conditioner, including a ceiling-mounted indoor unit, characterized in that: The patio indoor unit is the patio indoor unit as described in any one of claims 1 to 12.

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