Indoor unit of air conditioner

Abstract

The utility model discloses an air conditioner indoor unit which comprises a machine shell, a heat exchanger and a wind wheel assembly. The heat exchanger and the wind wheel assembly are arranged in the machine shell. A first indoor unit ventilation opening is formed in the top of the machine shell, a second indoor unit ventilation opening is formed in one side of the machine shell, and a third indoor unit ventilation opening is formed in the other side of the machine shell. When the wind wheel assembly is started, outdoor fresh air is sucked into the machine shell through the first indoor unit ventilation opening, and indoor return air is sucked into the machine shell through the second indoor unit ventilation opening, sequentially flows through the heat exchanger and the wind wheel assembly and then is blown out through the third indoor unit ventilation opening. The second indoor unit ventilation opening is provided with a ventilation structure which can be rotatably opened and closed to adjust the opening degree of the second indoor unit ventilation opening. Fresh air is introduced, the proportion of the fresh air and return air is adjusted, air return and air outlet are conducted on the side of the machine shell, indoor air circulation is effectively promoted, and the comfort experience of a user is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of air conditioning, and in particular to an indoor unit of an air conditioner. Background Technology

[0002] The indoor unit of an air conditioner is a type of split-system air conditioner. It is installed indoors to exchange heat with the indoor air, thereby regulating the indoor temperature. Indoor units include wall-mounted and floor-standing types. Wall-mounted air conditioner indoor units are installed on the wall and are popular among many users because they do not occupy floor space. Existing wall-mounted air conditioner indoor units deliver air from top to bottom, that is, air is drawn in from the vents at the top of the unit and blown out from the vents at the bottom of the unit to circulate and cool the indoor air. Since doors and windows are closed during cooling, the indoor space is in a closed state, and fresh outdoor air cannot be introduced. The air circulates repeatedly indoors, resulting in a decrease in oxygen content and an increase in carbon dioxide content. Users are prone to drowsiness. Moreover, the airflow is affected by the indoor ceiling height, which affects air circulation and reduces the user's comfort experience. Utility Model Content

[0003] The purpose of this invention is to provide an indoor air conditioning unit that can introduce fresh air and adjust the ratio of fresh air to return air, thereby improving the user's comfort experience.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An indoor unit for air conditioning includes a casing, and a heat exchanger and a fan assembly disposed within the casing. The casing has a first indoor unit vent at the top, a second indoor unit vent on one side, and a third indoor unit vent on the other side. When the fan assembly is activated, outdoor fresh air is drawn into the casing through the first indoor unit vent and indoor return air is drawn into the casing through the second indoor unit vent. After flowing sequentially through the heat exchanger and the fan assembly, the air is blown out through the third indoor unit vent. A ventilation structure is provided at the second indoor unit vent for rotating and opening to adjust the opening degree of the second indoor unit vent.

[0006] Based on the above technical solution, the present invention can be improved as follows:

[0007] Furthermore, the ventilation structure includes a fixed plate fixedly installed at the second indoor unit ventilation opening, the fixed plate having an opening formed therein; a rotatable rotating plate is provided on the fixed plate, the rotating plate having a ventilation groove formed therein; when the rotating plate is rotated, the opening and the ventilation groove can be made to be opposite or misaligned.

[0008] Furthermore, an electric drive unit is provided on the fixed plate, and the electric drive unit is driven to the rotating plate to drive the rotating plate to rotate relative to the fixed plate.

[0009] Furthermore, a circular drive gear is connected to the output end of the electric drive unit, and the circular drive gear has active meshing teeth on its outer circumferential surface; an annular driven gear is fixedly arranged in the middle of the inner side of the rotating plate, and the annular driven gear has driven meshing teeth on its inner circumferential surface; when the electric drive unit is started, the circular drive gear and the annular driven gear mesh with each other to drive the rotating plate to rotate relative to the fixed plate.

[0010] Furthermore, the heat exchanger divides the internal space of the casing into a first air cavity and a second air cavity. The first indoor unit vent and the second indoor unit vent are connected to the first air cavity, and the third indoor unit vent is connected to the second air cavity. The impeller assembly and the air guide assembly are located in the second air cavity.

[0011] Furthermore, a water collection tray is provided at the bottom of the heat exchanger, and an overflow box and an overflow port connected to the overflow box are provided on one side of the water collection tray. The overflow port is located at the top of the side wall of the water collection tray. When the condensate in the water collection tray exceeds the preset water level, the condensate can flow from the water collection tray into the overflow box through the overflow port.

[0012] Furthermore, an atomizing nozzle is provided at the third internal vent, and a liquid supply pump is connected between the atomizing nozzle and the overflow box via a liquid supply pipe.

[0013] Furthermore, a liquid level sensor is installed inside the overflow box. The liquid level sensor is connected to the air conditioning control box built into the housing via wired or wireless means. The liquid level sensor is used to monitor the water level in the overflow box and send the water level value to the external control box.

[0014] Furthermore, an air guide assembly is also provided inside the casing, the air guide assembly forms an air guide channel, the inlet end of the air guide channel is opposite to the heat exchanger, and the outlet end of the air guide channel is connected to the third indoor unit vent.

[0015] Furthermore, the air guide assembly includes a volute and a volute tongue disposed on one side of the volute, the volute and the volute tongue extending toward one side wall of the housing respectively, and the air guide channel is formed between the volute and the volute.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] This invention features a first indoor unit vent at the top of the casing to draw in fresh outdoor air, a second indoor unit vent on one side of the casing to draw in indoor return air, and a third indoor unit vent on the other side of the casing to blow air into the room. The second indoor unit vent has a ventilation structure; by rotating the ventilation structure, the opening of the second indoor unit vent can be adjusted to regulate the return air flow and correspondingly adjust the ratio of fresh air to return air, thereby improving user comfort. Furthermore, since both return and exhaust air occur on the side of the casing, airflow is not affected by the indoor ceiling height, effectively promoting indoor air circulation and further enhancing user comfort. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the front structure of the indoor unit of the air conditioner in Example 1;

[0020] Figure 2 This is a schematic diagram of the rear structure of the indoor unit of the air conditioner in Example 1;

[0021] Figure 3 This is a schematic diagram of the internal structure of the indoor unit of the air conditioner in Example 1;

[0022] Figure 4 This is a schematic diagram of the ventilation structure in Example 1;

[0023] Figure 5 This is a schematic diagram of the structure of the fixing plate in Embodiment 1;

[0024] Figure 6 This is a schematic diagram of the transfer plate in Example 1;

[0025] Figure 7 This is a schematic diagram of the heat exchanger connection to the water collection tray in Example 1;

[0026] Figure 8 This is a schematic diagram of the overflow box connected to the atomizing nozzle in Example 1;

[0027] Figure 9 This is a schematic diagram of the dual cross-flow impeller in Example 1;

[0028] Figure 10 This is a schematic diagram of the single cross-flow wind turbine in Example 1;

[0029] Figure 11 This is a schematic diagram of the external structure of the indoor unit of the air conditioner in Example 2;

[0030] Figure 12 This is a schematic diagram of the internal structure of the indoor unit of the air conditioner in Example 3.

[0031] The markings on the attached diagram are as follows: 1-Casing, 1a-Top wall, 1b-Bottom wall, 1c-Left side wall, 1d-Right side wall, 1e-Front side wall, 1f-Rear side wall, 101-First indoor unit vent, 102-Second indoor unit vent, 103-Third indoor unit vent, 2-Heat exchanger, 3-Refrigerant connector, 4-Fixing plate, 5-Rotating plate, 6-Rotating motor, 7-Circular drive gear, 8-Annular driven gear, 9-Air conditioning control box, 10-Water collection tray, 11-Overflow box, 12-Liquid level sensor, 13-Liquid supply pump, 14-Cross-flow fan, 15-Dual-head motor, 16-Single-head motor, 17-Vortex housing, 18-Vortex tongue, 19-Atomizing nozzle. Detailed Implementation

[0032] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. These descriptions are intended to aid in understanding the utility model but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0033] Example 1

[0034] See Figures 1 to 10 This embodiment relates to an indoor unit of an air conditioner, including a casing 1, a heat exchanger 2, a fan assembly, and an air guide assembly disposed within the casing 1; an air duct is formed inside the casing 1, a first indoor unit vent 101 is formed at the top of the casing 1, a second indoor unit vent 102 is formed on the left side of the casing 1, and a third indoor unit vent 103 is formed on the right side of the casing 1, so that air can enter the casing 1 through the first indoor unit vent 101 and the second indoor unit vent 102 respectively, flow sequentially along the air duct through the heat exchanger 2, the fan assembly, and the air guide assembly, and then be blown out of the casing 1 from the third indoor unit vent 103.

[0035] The casing 1 is equipped with a refrigerant connector 3, which is connected to a refrigerant pipe. The end of the refrigerant pipe extends through the wall and connects to the outdoor unit installed outdoors.

[0036] It should be noted that in this embodiment, the outdoor unit is a conventional split-type air conditioner outdoor unit in the prior art, used to circulate and cool the refrigerant and deliver it to the air conditioner indoor unit in this embodiment to cool the drawn-in air. Any type of split-type air conditioner outdoor unit can be used in the air conditioner indoor unit in this embodiment and can achieve the same cooling effect. Those skilled in the art can select according to actual cooling needs. The refrigerant pipe adopts copper pipe in the prior art, and the copper pipe is fitted with an insulation sleeve to reduce the absorption of external heat.

[0037] The casing 1 is provided with a rotatable and closable ventilation structure at the second indoor unit vent 102. By adjusting the opening degree of the ventilation structure, the indoor return air volume can be adjusted, thereby changing the ratio of fresh air to return air and improving the user's comfort experience.

[0038] Specifically, the housing 1 is a rectangular shell structure, including a top wall 1a, a bottom wall 1b, a left side wall 1c, a right side wall 1d, a front side wall 1e, and a rear side wall 1f that are spliced ​​together. The top wall 1a and the bottom wall 1b are vertically opposite each other, the left side wall 1c and the right side wall 1d are horizontally opposite each other, and the front side wall 1e and the rear side wall 1f are front-to-back opposite each other.

[0039] The first indoor unit vent 101 is located on the top wall 1a of the casing 1, the second indoor unit vent 102 is located on the left side wall 1c of the casing 1, and the third indoor unit vent 103 is located on the right side wall 1d. The positions of the second indoor unit vent 102 and the third indoor unit vent 103 can be set according to actual needs. For example, the second indoor unit vent 102 can be located on the left side wall 1c of the casing 1, and the third indoor unit vent 103 can be located on the front side wall 1e of the casing 1. Alternatively, the second indoor unit vent 102 can be located on the right side wall 1d of the casing 1, and the third indoor unit vent 103 can be located on the front side wall 1e of the casing 1.

[0040] The first indoor unit vent 101 is a circular vent structure used to connect to the fresh air duct and introduce outdoor fresh air; the second indoor unit vent 102 is a circular vent structure and two are arranged vertically on the left side wall 1c of the casing 1; the third indoor unit vent 103 is a rectangular vent structure; air circulates on the side of the casing 1 through the second indoor unit vent 102 and the third indoor unit vent 103 to avoid the influence of indoor floor height. Compared with the top-down air supply method in the prior art, it can improve the air flow range and avoid direct airflow to the user's head, thus improving the user's comfort experience.

[0041] The ventilation structure includes a fixed plate 4 disposed at the second indoor unit vent 102, the fixed plate 4 having an opening for air circulation; a rotatable rotating plate 5 disposed on the fixed plate 4, the rotating plate 5 being rotatable relative to the fixed plate 4 around an axis, the rotating plate 5 having a ventilation groove; when the ventilation groove on the rotating plate 5 is aligned with the opening on the fixed plate 4, the second indoor unit vent 102 opens; when the ventilation groove on the rotating plate 5 is misaligned with the opening on the fixed plate 4, the rotating plate 5 closes the opening on the fixed plate 4, thereby closing the second indoor unit vent 102.

[0042] In this embodiment, the fixed plate 4 has at least two openings, which are equally spaced around the center of the fixed plate 4, and the openings are fan-shaped. Correspondingly, the rotating plate 5 has at least two ventilation slots, which are equally spaced around the center of the rotating plate 5, and the ventilation slots are V-shaped. When the rotating plate 5 is rotated, the ventilation slots on the rotating plate 5 and the openings on the fixed plate 4 can be aligned one-to-one to open the second indoor unit ventilation port 102. By rotating the rotating plate 5, the relative degree between the ventilation slots and the openings can be adjusted to adjust the opening degree of the second indoor unit ventilation port 102, thereby adjusting the return air volume and changing the ratio of fresh air to return air. When the second indoor unit ventilation port 102 is completely closed, indoor return air is stopped, and only outdoor fresh air is introduced.

[0043] An electric drive unit is installed on the inner side of the fixed plate 4. The electric drive unit is connected to the rotating plate 5 to drive the rotating plate 5 to rotate. The electric drive unit is a rotary motor 6. A circular drive gear 7 is connected to the output end of the rotary motor 6. The circular drive gear 7 has active meshing teeth on its outer circumferential surface. An annular driven gear 8 is fixedly installed in the middle of the inner side of the rotating plate 5. The inner circumferential surface of the annular driven gear 8 has driven meshing teeth. When the rotary motor 6 is started, the circular drive gear 7 and the annular driven gear 8 mesh with each other to drive the rotating plate 5 to rotate relative to the fixed plate 4. The rotary motor 6 is electrically connected to the air conditioning control box 9 built into the housing 1 through a cable.

[0044] The heat exchanger 2 is a flat plate tube-fin heat exchanger in the prior art. One end of the heat exchanger 2 is fixedly connected to the rear side wall 1f of the casing 1, and the other end of the heat exchanger 2 is fixedly connected to the front side wall 1e of the casing 1. The heat exchanger 2 after connection is inclined to the second indoor unit vent 102 to increase the contact area with air and improve the cooling effect of air. The heat exchanger 2 divides the internal space of the casing 1 into a first air cavity and a second air cavity. The first indoor unit vent 101 and the second indoor unit vent 102 are connected to the first air cavity, and the third indoor unit vent 103 is connected to the second air cavity. The impeller assembly and the air guide assembly are located in the second air cavity.

[0045] A water collection tray 10 is provided at the bottom of the heat exchanger 2. The water collection tray 10 is used to collect the condensate generated when the heat exchanger 2 exchanges heat with the air, so as to prevent the condensate from coming into contact with other electrical components and causing a short circuit. In this embodiment, there are two refrigerant connectors 3, which are provided on the rear side wall 1f of the casing 1. The two refrigerant connectors 3 are respectively connected to the refrigerant input end and the refrigerant output end of the heat exchanger 2.

[0046] The water collection tray 10 is fixedly installed on the bottom wall 1b of the housing 1. An overflow box 11 is provided on one side of the water collection tray 10, and an overflow port is connected to the overflow box 11. The overflow port is located at the top of the side wall of the water collection tray 10. When the condensate in the water collection tray 10 exceeds the preset water level, the condensate can flow from the water collection tray 10 into the overflow box 11 through the overflow port, thereby preventing the condensate from overflowing and short-circuiting with other electrical components.

[0047] An atomizing nozzle 19 is provided at the third internal ventilation opening 103. A liquid supply pump 13 is connected between the atomizing nozzle 19 and the overflow box 11 through a liquid supply pipe. The liquid supply pump 13 is used to pressurize and deliver condensate through the atomizing nozzle. The condensate is atomized by the atomizing nozzle 19 and blown out with the cold air, which can not only increase the indoor humidity, but also make full use of the condensate. In this embodiment, the number of atomizing nozzles 19 can be increased or decreased according to actual needs.

[0048] An overflow box 11 is equipped with a liquid level sensor 12, which is connected to the air conditioning control box 9 built into the housing 1 via wired or wireless means. The liquid level sensor 12 is used to monitor the water level in the overflow box 11 and send the water level value to the air conditioning control box 9. The air conditioning control box 9 is existing technology and has a box body and a drive circuit module installed in the box body. When the water level value is lower than the set threshold, the air conditioning control box 9 sends a shut-off signal to the liquid supply pump 13. When the water level value is higher than the set threshold, the air conditioning control box 9 sends a start signal to the liquid supply pump 13 to resume supplying condensate to the atomizing nozzle 19 for atomization humidification.

[0049] The fan assembly includes a cross-flow fan 14 and a drive motor. The rotation axis of the cross-flow fan 14 is parallel to the vertical direction. The drive motor is fixed inside the housing 1 by a bracket. The output end of the drive motor is connected to the drive of the cross-flow fan 14. The drive motor is electrically connected to the air conditioning control box 9 by a cable. When the drive motor starts, it drives the cross-flow fan 14 to rotate around the axis, so that air flows from the first air chamber to the second air chamber and is blown out from the third indoor unit vent 103.

[0050] In this embodiment, two cross-flow fan wheels 14 are provided, and the drive motor is a dual-head motor 15 in the prior art. The two cross-flow fan wheels are respectively connected to the two output terminals of the dual-head motor 15 along the axial direction. When the dual-head motor 15 is started, it can drive the two cross-flow fan wheels 14 to rotate around the rotation axis at the same time. According to the actual situation, in this embodiment, one cross-flow fan wheel 14 can also be provided, and the drive motor is a single-head motor 16 in the prior art. The axial length of the cross-flow fan wheel 14 corresponds to the length of the third indoor unit ventilation port 103, and the cross-flow fan wheel 14 is connected to the output terminal of the single-head motor 16.

[0051] The air guiding assembly includes a volute portion 17 and a volute tongue 18 disposed on one side of the volute portion 17. The volute portion 17 and the volute tongue 18 extend toward the right side wall 1d of the casing 1, and an air guiding channel is formed between the volute portion 17 and the volute tongue 18. The volute portion 17 has an air guide port on the side opposite to the heat exchanger 2. The air guide port is connected to one end of the air guiding channel to facilitate the introduction of air, and the other end of the air guiding channel is connected to the third indoor unit vent 103 to facilitate the exhaust of air. The volute portion 17 and the volute tongue 18 form a volute-like structure, which is conducive to uniform air delivery and improves the user's comfort experience.

[0052] Example 2

[0053] See Figure 11 The difference between this embodiment and the technical solution of Embodiment 1 is that, in this embodiment, the first indoor unit vent 101 is located on the top wall 1a of the casing 1, the second indoor unit vent 102 is located on the left side wall 1c of the casing 1, and the third indoor unit vent 103 is located on the front side wall 1e of the casing 1; in this embodiment, the volute portion 17 and the volute tongue 18 extend toward the front side wall 1e of the casing 1 respectively, and an air guide channel is formed between the volute portion 17 and the volute tongue 18. The inlet end of the air guide channel is opposite to the heat exchanger 2, and the outlet end of the air guide channel is connected to the third indoor unit vent 103.

[0054] Example 3

[0055] See Figure 12 The difference between this embodiment and the technical solution of Embodiment 1 is that the heat exchanger 2 in this embodiment is a bent tube-fin heat exchanger, which can further increase the contact area with air and improve the heat exchange efficiency compared with the flat tube-fin heat exchanger used in Embodiment 1.

[0056] Specifically, the heat exchanger 2 includes a first bent section and a second bent section. The first bent section is inclinedly opposite to the second indoor unit vent 102, and the second bent section is opposite to the front side wall 1e of the casing 1. The first bent section and the second bent section transition with an arc at the bend. The end of the first bent section away from the bend is connected to the rear side wall 1f of the casing 1, and the end of the second bent section away from the bend is connected to the front side wall 1e of the casing 1. In this embodiment, the shape of the water collection tray 10 corresponds to the shape of the heat exchanger 2.

[0057] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. An indoor unit for an air conditioner, comprising a casing, and a heat exchanger and a fan assembly disposed within the casing; characterized in that, The casing has a first indoor unit vent on the top, a second indoor unit vent on one side, and a third indoor unit vent on the other side. When the fan assembly starts, outdoor fresh air is drawn into the casing through the first indoor unit vent and indoor return air is drawn in through the second indoor unit vent. After flowing through the heat exchanger and the fan assembly in sequence, the air is blown out through the third indoor unit vent. The second indoor unit vent is equipped with a ventilation structure that can be rotated and opened to adjust the opening degree of the second indoor unit vent. 2.The indoor unit of the air conditioner according to claim 1, characterized by, The ventilation structure includes a fixed plate fixedly installed at the second indoor unit vent, and an opening is formed on the fixed plate; a rotatable rotating plate is provided on the fixed plate, and a ventilation groove is formed on the rotating plate; when the rotating plate is rotated, the opening and the ventilation groove can be made to be opposite or misaligned. 3.The indoor unit of the air conditioner according to claim 2, characterized by, An electric drive unit is provided on the fixed plate, and the electric drive unit is driven to drive the rotating plate to rotate relative to the fixed plate. 4.The indoor unit of the air conditioner according to claim 3, characterized by, A circular drive gear is connected to the output end of the electric drive unit, and the circular drive gear has active meshing teeth on its outer circumferential surface; an annular driven gear is fixedly arranged in the middle of the inner side of the rotating plate, and the annular driven gear has driven meshing teeth on its inner circumferential surface; when the electric drive unit is started, the circular drive gear and the annular driven gear mesh with each other to drive the rotating plate to rotate relative to the fixed plate. 5.The indoor unit of the air conditioner according to claim 1, characterized by, The heat exchanger divides the internal space of the casing into a first air chamber and a second air chamber. The first indoor unit vent and the second indoor unit vent are connected to the first air chamber, and the third indoor unit vent is connected to the second air chamber. The impeller assembly and the air guide assembly are located in the second air chamber.

6. The indoor unit of the air conditioner according to claim 5, characterized in that, A water collection tray is provided at the bottom of the heat exchanger, and an overflow box and an overflow port connected to the overflow box are provided on one side of the water collection tray. The overflow port is located at the top of the side wall of the water collection tray. When the condensate in the water collection tray exceeds the preset water level, the condensate can flow from the water collection tray into the overflow box through the overflow port. 7.The indoor unit of the air conditioner according to claim 6, characterized in that, An atomizing nozzle is provided at the third indoor unit vent, and a liquid supply pump is connected between the atomizing nozzle and the overflow box via a liquid supply pipe. 8.The indoor unit of the air conditioner according to claim 7, characterized by, The overflow box is equipped with a liquid level sensor, which is connected to the air conditioning control box built into the housing via wired or wireless means. The liquid level sensor is used to monitor the water level in the overflow box and send the water level value to the external control box. 9.The indoor unit of the air conditioner of claim 8, characterized in that, The casing is also equipped with an air guide assembly, which forms an air guide channel. The inlet end of the air guide channel is opposite to the heat exchanger, and the outlet end of the air guide channel is connected to the third indoor unit vent. 10.The indoor unit of the air conditioner according to claim 9, characterized by, The air guide assembly includes a volute and a volute tongue disposed on one side of the volute. The volute and the volute tongue extend toward one side wall of the housing, and the air guide channel is formed between the volute and the volute.

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