Air conditioner indoor unit, air conditioner, and control method of air conditioner indoor unit

Abstract

The present invention discloses an air conditioner indoor unit, an air conditioner and a control method for the air conditioner indoor unit. The air conditioner indoor unit comprises: a housing, a fan, a first heat exchanger, a second heat exchanger, a connecting port and a wind shield. The housing has an air inlet and an air outlet; the fan, the first heat exchanger and the second heat exchanger are all arranged in the housing; the fan has an air suction port and an air blowing port, the air suction port is connected with the air inlet, and the air blowing port is connected with the air outlet; the first heat exchanger is located between the air blowing port and the air outlet; the second heat exchanger is located between the first heat exchanger and the air outlet, the second heat exchanger is arranged at intervals from the first heat exchanger, and a gas flow channel is defined between the first heat exchanger and the second heat exchanger; the connecting port connects the air outlet and the gas flow channel; the wind shield is switchably arranged at the connecting port between an open state and a closed state. The air conditioner indoor unit, the air conditioner and the control method for the air conditioner indoor unit disclosed in the present invention can avoid the air outlet temperature of the air outlet being too low in the dehumidification mode.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration and heating equipment, and in particular to an air-conditioning indoor unit, an air conditioner and a control method for the air-conditioning indoor unit. Background Art

[0002] The indoor unit of the air conditioner is the heat exchange equipment of the air conditioner in the room. The indoor unit of the air conditioner includes a shell with an air inlet and an air outlet defined by a box body. A fan and a heat exchanger are arranged in the shell. The fan inhales indoor air through the air inlet and blows air to the heat exchanger. After the air is heat-exchanged in the heat exchanger, it is discharged from the air outlet. The heat exchangers in the existing indoor units of the air conditioner are mostly laminated structures. When the existing indoor units of the air conditioner are dehumidified, the air outlet temperature is too low. When the indoor environment is in a high humidity and low temperature environment, the dehumidification mode of the air conditioner will cause the indoor temperature to drop rapidly.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide an air conditioner indoor unit, an air conditioner and a control method for the air conditioner indoor unit, aiming to solve the technical problem of too low air outlet temperature during dehumidification in the prior art.

[0005] To achieve the above-mentioned purpose, the present invention proposes an air conditioner indoor unit, which includes: a shell, a fan, a first heat exchanger, a second heat exchanger, a connecting port and a wind shield. The shell has an air inlet and an air outlet; the fan has an air suction port and an air blowing port, which are arranged in the shell, and the air suction port is connected with the air inlet, and the air blowing port is connected with the air outlet; the first heat exchanger is arranged in the shell, located between the air blowing port and the air outlet; the second heat exchanger is arranged in the shell, located between the first heat exchanger and the air outlet, and the second heat exchanger is arranged at intervals from the first heat exchanger, and a gas flow channel is defined between the first heat exchanger and the second heat exchanger; the connecting port connects the air outlet and the gas flow channel; the wind shield is switchably arranged at the connecting port between an open state and a closed state, and in the open state, the connecting port is opened, and in the closed state, the connecting port is closed.

[0006] Optionally, there is a gap between the second heat exchanger and the shell, and the communication port is formed by the gap between the second heat exchanger and the shell.

[0007] Optionally, the fan is a centrifugal fan, the air outlet is close to the top wall of the shell, there is a gap between the top side of the second heat exchanger and the top wall of the shell, and the connecting port is formed by the gap between the top side of the second heat exchanger and the top wall of the shell.

[0008] Optionally, the height of the first heat exchanger is greater than the height of the second heat exchanger, and the bottom side of the first heat exchanger is flush with the bottom side of the second heat exchanger.

[0009] Optionally, the first heat exchanger and the second heat exchanger are arranged in parallel.

[0010] Optionally, the first heat exchanger and the second heat exchanger are both arranged at an angle, and the top side of the first heat exchanger and the top side of the second heat exchanger are both inclined in a direction away from the air outlet.

[0011] Optionally, the wind resistance per unit area on the first heat exchanger is greater than or equal to the wind resistance per unit area on the second heat exchanger.

[0012] Optionally, the air conditioner indoor unit further comprises: a water receiving pan. The water receiving pan is arranged in the shell and is located below the first heat exchanger and the second heat exchanger.

[0013] Optionally, the open state includes a plurality of different open states, and the wind shield makes the opened connecting port at different opening degrees in each different open state, and the wind shield is switchably arranged at the connecting port between each different open state and closed state.

[0014] Optionally, the air conditioner indoor unit further includes: a driving mechanism, which is disposed in the shell and is used to drive the wind shield to switch between an open state and a closed state.

[0015] Optionally, a heat insulation structure is provided at the air outlet.

[0016] Optionally, the communication port passes through the second heat exchanger.

[0017] Optionally, when the indoor unit of the air conditioner is in cooling mode or heating mode, the wind shield is in a closed state so that all the gas in the gas flow channel flows through the second heat exchanger to the air outlet;

[0018] When the indoor unit of the air conditioner is in the dehumidification mode, the wind shield is in an open state, so that part of the gas in the gas flow channel flows to the air outlet through the connecting port.

[0019] The air conditioner proposed by the present invention includes the above-mentioned air conditioner indoor unit.

[0020] The control method of the air conditioner indoor unit proposed by the present invention is used for the above-mentioned air conditioner indoor unit, and the method comprises the steps of:

[0021] When the indoor unit of the air conditioner is in cooling mode or heating mode, the wind shield is controlled to be in a closed state so that all the gas in the gas flow channel flows through the second heat exchanger to the air outlet;

[0022] When the indoor unit of the air conditioner is in a dehumidification mode, the wind shield is controlled to be in an open state so that part of the gas in the gas flow channel flows to the air outlet through the connecting port.

[0023] In the technical solution of the present invention, the first heat exchanger and the second heat exchanger cool or heat synchronously, and the fan sucks indoor air from the air inlet through the air suction port and blows air toward the first heat exchanger. In dehumidification mode, the wind shield is controlled to be in an open state, so that the connecting port is connected to the air outlet, and the first heat exchanger and the second heat exchanger are both cooling. The gas blown out by the fan passes through the first heat exchanger and then enters the gas flow channel to mix. Since the wind resistance at the connecting port is small, most of the gas in the gas flow channel will flow to the air outlet through the connecting port, and only a small part of the gas in the gas flow channel will pass through the second heat exchanger for heat exchange, which can reduce the temperature difference between the outlet air temperature and the indoor temperature, slow down the speed of indoor temperature reduction, and increase the comfort of indoor air. In cooling mode or heating mode, the wind shield is controlled to be in a closed state to seal the connecting port. The first heat exchanger and the second heat exchanger both cool or heat. The gas blown out by the fan passes through the first heat exchanger and enters the gas flow channel for mixing. Since the connecting port is closed by the wind shield, the wind resistance at the connecting port is large. All the gas in the gas flow channel will pass through the second heat exchanger for heat exchange, so that the gas is fully cooled or heated, ensuring that low-temperature gas is blown out from the air outlet in cooling mode, and fully heated gas is blown out from the air outlet 120 in heating mode. In this solution, when in cooling mode or heating, the gas passes through the first heat exchanger and the second heat exchanger for heat exchange, which can ensure the cooling or heating effect; in dehumidification mode, most of the gas only passes through the first heat exchanger for heat exchange, which can avoid the outlet air temperature being too low; in addition, whether in cooling mode, heating mode or dehumidification mode, the gas after passing through the first heat exchanger is mixed in the gas flow channel. After mixing, the temperature and flow rate of the gas are more uniform, and the temperature and flow rate of the gas flowing to the air outlet are also more uniform, and there is no surge in the wind field passing through the second heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of an embodiment of an air conditioner indoor unit provided by the present invention when the wind shield is in a closed state;

[0026] Figure 2 A schematic diagram of an embodiment of an air conditioner indoor unit provided by the present invention when the wind shield is in an open state;

[0027] Figure 3 A schematic diagram of a first heat exchanger, a second heat exchanger and a wind shield when the wind shield of an embodiment of an air conditioner indoor unit provided by the present invention is in an open state;

[0028] Figure 4 A schematic diagram of a first heat exchanger, a second heat exchanger and a wind shield when the wind shield of an embodiment of an air conditioner indoor unit provided by the present invention is in a closed state;

[0029] Description of Figure Numbers:

[0030] Label name Label name 100 case 110 Air Inlet 120 Air outlet 130 Lower area 140 Upper area 200 Fan 210 Air intake 220 Air outlet 300 First heat exchanger 400 Second heat exchanger 500 Gas flow channel 600 Connecting port 700 Wind deflector 710 Shaft 800 Water tray 900 Insulation structure

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] If there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] In the prior art, the heat exchanger in the indoor unit of the air conditioner is a fitted stacked structure. No matter in heating mode, cooling mode or dehumidification mode, the wind blown by the fan must pass through all layers of the heat exchanger in sequence for heat exchange. In the dehumidification mode, since the wind needs to pass through all layers of the heat exchanger, the heat exchange path and time are long, and the temperature of the gas after passing through the heat exchanger is low, resulting in a very low temperature of the air outlet, which will cause the indoor temperature to drop rapidly. When the indoor environment is in a high humidity and low heat environment, if the dehumidification mode is used for dehumidification, the room will produce an obvious cold feeling, causing discomfort to the people indoors.

[0036] The air conditioner indoor unit and air conditioner proposed in the present invention can ensure the cooling effect in the cooling mode while preventing the air outlet temperature of the air outlet 120 from being too low in the dehumidification mode, and the temperature and flow rate of the air outlet 120 are uniform.

[0037] like Figure 1 , Figure 2 As shown, in the embodiment of the air-conditioning indoor unit proposed by the present invention, the air-conditioning indoor unit includes: a housing 100, a fan 200, a first heat exchanger 300, a second heat exchanger 400, a connecting port 600 and a wind shield 700. The housing 100 has an air inlet 110 and an air outlet 120; the fan 200 has an air suction port 210 and an air blowing port 220, and is arranged in the housing 100, and the air suction port 210 is connected with the air inlet 110, and the air blowing port 220 is connected with the air outlet 120; the first heat exchanger 300 is arranged in the housing 100, and is located between the air blowing port 220 and the air outlet 120; the second heat exchanger 400 is arranged in the housing 100, and is located between the first heat exchanger 300 and the air outlet 120. Between the air outlet 120, the second heat exchanger 400 and the first heat exchanger 300 are arranged at intervals, and a gas flow channel 500 is defined between the first heat exchanger 300 and the second heat exchanger 400; the connecting port 600 connects the air outlet 120 and the gas flow channel 500; the wind shield plate 700 is switchably arranged at the connecting port 600 between an open state and a closed state, and in the open state, the connecting port 600 is opened, and in the closed state, the connecting port 600 is closed.

[0038] The shell 100 can be a chassis of an air-conditioning indoor unit. The fan 200, the first heat exchanger 300 and the second heat exchanger 400 are arranged in sequence from the air inlet 110 to the air outlet 120 in the shell 100. The first heat exchanger 300 and the second heat exchanger 400 can be fin-type heat exchangers. The wind shield 700 can be rotatably connected or slidably connected at the connecting port 600. The wind shield 700 changes its position by rotating or sliding to open or close the connecting port 600.

[0039] The shape of the first heat exchanger 300 and the shape of the second heat exchanger 400 are determined according to the cross-section of the shell 100, and can be determined according to the radial cross-section, vertical cross-section or oblique cross-section of the shell 100. The first heat exchanger 300 partitions the shell 100, and the second heat exchanger 400 cooperates with the closed wind shield 700 to partition the shell 100.

[0040] The cross section of the housing 100 may be rectangular, circular, triangular or various irregular shapes.

[0041] When the cross section of the shell 100 is rectangular, the first heat exchanger 300 and the second heat exchanger 400 can be rectangular plate-shaped heat exchangers. Of course, the first heat exchanger 300 and the second heat exchanger 400 can also be heat exchangers of other shapes according to the cross section of the shell 100. For example, when the cross section of the shell 100 is circular or elliptical, the first heat exchanger 300 and the second heat exchanger 400 can be circular or elliptical. The cross section of the shell 100 can be a radial cross section, a vertical cross section or an oblique cross section.

[0042] The wind shielding plate 700 can be rotatably connected at the communication port 600 via a rotating shaft 710 parallel to the air outlet surface of the second heat exchanger 400 .

[0043] The connecting port 600 can be arranged at various positions on the surface where the second heat exchanger 400 is located, and can be arranged in the middle of the second heat exchanger 400, or on the side of the second heat exchanger 400, or on the left side, right side, top side or bottom side.

[0044] The refrigerant channel of the first heat exchanger 300 and the refrigerant channel of the second heat exchanger 400 may be communicated with the same position of the refrigerant circulation pipeline of the air conditioner.

[0045] The side edges of the first heat exchanger 300 and the second heat exchanger 400 can be connected and fixed by corresponding side plates. The first heat exchanger 300 and the second heat exchanger 400 are connected and fixed to the inner wall of the shell 100 through the side plates. At this time, a gas flow channel 500 can be defined by the first heat exchanger 300, the second heat exchanger 400 and the side plates connected thereto. The first heat exchanger 300 and the second heat exchanger 400 can also be directly connected and fixed to the inner wall of the shell 100. At this time, the first heat exchanger 300, the second heat exchanger 400 and the inner wall of the shell 100 define a gas flow channel 500.

[0046] In the above embodiment, the first heat exchanger 300 and the second heat exchanger 400 cool or heat synchronously, the fan 200 sucks indoor air from the air inlet 110 through the air suction port 210, and blows air out from the air blowing port 220, and the blown air flows toward the first heat exchanger 300.

[0047] In the dehumidification mode, the wind shield 700 is controlled to be in an open state so that the connecting port 600 is connected to the air outlet 120, and the first heat exchanger 300 and the second heat exchanger 400 are both refrigerated. The gas blown out by the fan 200 passes through the first heat exchanger 300 and then enters the gas flow channel 500 for mixing. Since the wind resistance at the connecting port 600 is small, most of the gas in the gas flow channel 500 will flow to the air outlet 120 through the connecting port 600, and only a small part of the gas in the gas flow channel 500 will pass through the second heat exchanger 400 for heat exchange, which can reduce the temperature difference between the outlet temperature of the air at the air outlet 120 and the indoor temperature, slow down the speed of indoor temperature reduction, and increase the comfort of indoor air.

[0048] In cooling mode or heating mode, the wind shield 700 is controlled to be in a closed state, the connecting port 600 is blocked by the wind shield 700, the first heat exchanger 300 and the second heat exchanger 400 are both cooling or heating, and the gas blown out by the fan 200 passes through the first heat exchanger 300 and enters the gas flow channel 500 for mixing. Since the connecting port 600 is closed by the wind shield 700, the wind resistance at the connecting port 600 is large, and all the gas in the gas flow channel 500 will pass through the second heat exchanger 400 for heat exchange, so that the gas temperature is fully reduced or increased, which can ensure that low-temperature gas is blown out from the air outlet 120 in cooling mode, and fully heated gas is blown out from the air outlet 120 in heating mode.

[0049] In this embodiment, when the cooling mode or the heating mode is in progress, the gas passes through the first heat exchanger 300 and the second heat exchanger 400 for heat exchange, thereby ensuring the cooling and heating effects; in the dehumidification mode, most of the gas only passes through the first heat exchanger 300 for heat exchange, thereby preventing the air outlet temperature 120 from being too low; in addition, no matter in the cooling mode, the heating mode or the dehumidification mode, the gas after passing through the first heat exchanger 300 is mixed in the gas flow channel 500. After mixing, the temperature and flow rate of the gas are more uniform, and the temperature and flow rate of the gas flowing to the air outlet 120 are also more uniform, and there is no surge in the wind field passing through the second heat exchanger 400.

[0050] As a further solution of the above embodiment, there is a gap between the second heat exchanger 400 and the shell 100 , and the communication port 600 is formed by the gap between the second heat exchanger 400 and the shell 100 .

[0051] The second heat exchanger 400 may be spaced apart from any position of the top wall, the bottom wall or the side wall of the housing 100 .

[0052] At this time, the wind shield 700 is rotatably connected at the connecting port 600 through a rotating shaft 710 parallel to the air outlet surface of the second heat exchanger 400, and the rotating shaft is rotatably connected to the inner wall of the shell 100. One side of the wind shield 700 is connected and fixed to the rotating shaft 710 along the axial direction of the rotating shaft 710, and the other side of the wind shield 700 rotates with the rotating shaft 710. During the rotation of the wind shield 700, it will not block other positions of the second heat exchanger 400.

[0053] In a further solution of the above embodiment, the connecting port 600 can be defined by reducing the area of ​​the heat exchanger, which can further save costs; a wind shield 700 is arranged between the second heat exchanger 400 and the shell 100. The wind shield 700 is easy to arrange and will not affect the heat exchange part of the second heat exchanger 400. The influences here include: the flow direction of the gas passing through the second heat exchanger 400, the wind resistance of the second heat exchanger 400, etc.

[0054] As a further solution of the above embodiment, the fan 200 is a centrifugal fan 200, the air outlet 220 is close to the top wall of the shell 100, there is a gap between the top side of the second heat exchanger 400 and the top wall of the shell 100, and the connecting port 600 is formed by the gap between the top side of the second heat exchanger 400 and the top wall of the shell 100.

[0055] In this solution, when blowing, the air volume in the lower area 130 in the shell 100 is large, and the air volume in the upper area 140 is small. The second heat exchanger 400 is arranged behind the gas flow direction of the lower part of the first heat exchanger 300, and the wind shield 700 is arranged behind the gas flow direction of the upper part of the first heat exchanger 300.

[0056] In cooling or heating mode, the wind shield 700 is in a closed state. In the lower area 130 where the air volume is relatively large, the air blown by the centrifugal fan 200 enters the gas flow channel 500 after heat exchange through the first heat exchanger 300, and flows from bottom to top in the gas flow channel 500. In the upper area 140 where the air volume is small, the air blown by the centrifugal fan 200 enters the gas flow channel 500 after passing through the first heat exchanger 300, and moves from top to bottom in the gas flow channel 500. Since the gas flow rates in the upper and lower parts of the gas flow channel 500 are different, the gas in the gas flow channel 500 flows up and down under the obstruction of the wind shield 700, so that the gases in various parts of the gas flow channel 500 are fully mixed, and then the air is discharged after heat exchange through the second heat exchanger 400 in the lower area 130, which can ensure sufficient heat exchange and uniform air supply.

[0057] In the dehumidification mode, the wind shield 700 is opened, and the connecting port 600 is in a connected state. In the lower area 130 where the air volume is relatively large, the air blown out by the centrifugal fan 200 enters the gas flow channel 500 after heat exchange through the first heat exchanger 300. Most of the gas flows from bottom to top in the gas flow channel 500, and after mixing with the gas passing through the first heat exchanger 300 in the upper area 140 in the upper part of the gas flow channel 500, the air is discharged through the opened connecting port 600, which can ensure the mixing of the upper and lower gases in the gas flow channel 500. If the connecting port 600 is opened at other positions of the second heat exchanger 400, the gas flow after passing through the upper area 140 of the first heat exchanger 300 is less than the gas flow after passing through the lower area 130 of the first heat exchanger 300, and the gas in the upper part of the gas flow channel 500 is not easy to flow downward in the gas flow channel 500, which is not conducive to the mixing of the gas in the gas flow channel 500.

[0058] In a further solution of the above embodiment, the positions of the second heat exchanger 400 and the wind shield 700 are set according to the wind field of the centrifugal fan 200, which is conducive to the full mixing of the gas in the gas flow channel 500 regardless of the cooling mode, heating mode and dehumidification mode.

[0059] As a further solution of the above embodiment, the height of the first heat exchanger 300 is greater than the height of the second heat exchanger 400 , and the bottom side of the first heat exchanger 300 is flush with the bottom side of the second heat exchanger 400 .

[0060] When the first heat exchanger 300 and the second heat exchanger 400 are both rectangular plate-shaped heat exchangers, the widths of the first heat exchanger 300 and the second heat exchanger 400 can be made the same, the left side of the first heat exchanger 300 is flush with the left side of the second heat exchanger 400, and the right side of the first heat exchanger 300 is flush with the right side of the second heat exchanger 400, which is beneficial to the flow of gas in the gas flow channel 500 and to the uniform passage of the fully mixed gas in the gas flow channel 500 through the second heat exchanger 400 in the cooling mode or the heating mode.

[0061] In a further solution of the above embodiment, the area of ​​the second heat exchanger 400 can be reduced, thereby further saving costs.

[0062] As a further solution of the above embodiment, the first heat exchanger 300 and the second heat exchanger 400 are arranged in parallel.

[0063] In a further solution of the above embodiment, the gas flow and mixing in the gas flow channel 500 are facilitated, and the gas distribution in various places in the gas flow channel 500 is uniform.

[0064] Of course, the first heat exchanger 300 and the second heat exchanger 400 may also be arranged to be inclined relative to each other, as long as a gas flow channel 500 is ensured to be spaced apart between the first heat exchanger 300 and the second heat exchanger 400 .

[0065] As a further solution of the above embodiment, the first heat exchanger 300 and the second heat exchanger 400 are both tilted, and the top side of the first heat exchanger 300 and the top side of the second heat exchanger 400 are both tilted away from the blowing port 220 .

[0066] In a further solution of the above embodiment, the wind receiving areas of the first heat exchanger 300 and the second heat exchanger 400 can be increased, so as to improve the heat exchange efficiency of the gas and facilitate sufficient heat exchange.

[0067] As a further solution of the above embodiment, the wind resistance per unit area of ​​the first heat exchanger 300 is greater than or equal to the wind resistance per unit area of ​​the second heat exchanger 400 .

[0068] The wind resistance per unit area of ​​the first heat exchanger 300 may be greater than the wind resistance per unit area of ​​the second heat exchanger 400 .

[0069] The wind resistance per unit area on the first heat exchanger 300 and the second heat exchanger 400 can be changed by adjusting the fin spacing, changing the diameter of the heat exchange tube, or changing the fin opening pattern. When the first heat exchanger 300 having a wind resistance per unit area greater than the wind resistance per unit area on the second heat exchanger 400 is selected, a heat exchanger with a smaller fin spacing or a larger heat exchange tube diameter or a smaller fin opening diameter and a lower density can be selected.

[0070] In a further scheme of the above embodiment, the wind blown by the fan 200 first passes through the first heat exchanger 300. At this time, the wind speed is faster and the air volume is larger. Through the above configuration, it is beneficial for the wind to fully exchange heat in the first heat exchanger 300. After heat exchange in the first heat exchanger 300, the wind speed is reduced, and the wind slowly passes through the second heat exchanger 400 for heat exchange, which can ensure the heat exchange effect.

[0071] As a further solution of the above embodiment, the air conditioner indoor unit further includes a water receiving tray 800. The water receiving tray 800 is disposed in the housing 100 and is located below the first heat exchanger 300 and the second heat exchanger 400.

[0072] In a further solution of the above embodiment, the water receiving tray 800 is used to receive the condensed water generated by the first heat exchanger 300 and the second heat exchanger 400, so as to prevent the condensed water from flowing freely and affecting the equipment.

[0073] As a further solution of the above embodiment, the open state includes multiple different open states. The wind shield 700 makes the opened connecting port 600 at different opening degrees in each different open state. The wind shield 700 is switchably arranged at the connecting port 600 between each different open state and closed state.

[0074] In a further solution of the above embodiment, in the dehumidification mode, by controlling the wind shield 700 to make the connecting port 600 at different openings, the ratio of the gas passing through the second heat exchanger 400 and the connecting port 600 can be adjusted, so that more or less gas in the gas flow channel 500 passes through the second heat exchanger 400 for heat exchange, so as to adjust the temperature of the air outlet from the outlet 120 in the dehumidification mode.

[0075] As a further solution of the above embodiment, the air conditioner indoor unit further includes: a driving mechanism. The driving mechanism is arranged in the housing 100, and its output end is transmission-connected with the wind deflector 700. The driving mechanism is used to drive the wind deflector 700 to switch between an open state and a closed state.

[0076] The driving mechanism is a driving motor, which can be an electric motor or a hydraulic motor.

[0077] When the wind shield plate 700 is rotationally connected at the connecting port 600 , the driving mechanism may be a rotating motor; when the wind shield plate 700 is slidingly connected at the connecting port 600 , the driving mechanism may be a linear motor.

[0078] When the first heat exchanger 300 and the second heat exchanger 400 are connected and fixed to the shell 100 through the side plate, the driving mechanism can be connected and fixed to the side plate, and the driving mechanism is connected and fixed to the shell 100 through the side plate.

[0079] In a further solution of the above embodiment, it is helpful to control the wind shield 700 to switch between different states to control the connecting port 600 to be at different openings. Furthermore, the ratio of the gas passing through the second heat exchanger 400 and the connecting port 600 in the dehumidification mode can be adjusted to adjust the temperature of the air outlet 120 in the dehumidification mode.

[0080] The first heat exchanger 300 and the second heat exchanger 400 are both rectangular plate structures with the same width. The height of the second heat exchanger 400 is less than that of the second heat exchanger 400. The left side, right side and bottom side of the first heat exchanger 300 and the second heat exchanger 400 are flush. The left side, right side and bottom side of the first heat exchanger 300 and the second heat exchanger 400 are sealed and connected by the left side plate, the right side plate and the bottom plate respectively to form a cubic structure with an inclined setting and an opening on the top of the second heat exchanger 400. The communication port 600 is formed by the opening. The wind shield The width of 700 is greater than or equal to the width of the second heat exchanger 400. The wind shield 700 is rotatably connected to the top of the cubic structure through a rotating shaft 710 parallel to the first heat exchanger 300. The driving mechanism is a rotating motor. The output end of the rotating motor is transmission-connected to the rotating shaft 710 to drive the rotating shaft 710 to drive the wind shield 700 to rotate, and the wind shield 700 can be controlled to remain fixed at a certain angle. The driving mechanism can keep the wind shield 700 fixed at multiple different angles so that the opened connecting port 600 is at different openings.

[0081] As a further solution of the above embodiment, a heat preservation structure 900 is provided at the air outlet 120 .

[0082] The heat-insulating structure 900 may be a heat-insulating layer surrounding the air outlet 120 , and may be disposed on the inner wall of the housing 100 . The heat-insulating layer may be a heat-insulating sponge.

[0083] In a further scheme of the above embodiment, in cooling mode or dehumidification mode, the air outlet temperature of the air outlet is lower than the indoor temperature. The temperature difference between the air outlet temperature and the indoor gas can easily cause condensation water to form at the air outlet 120. The condensation water flows freely at the air outlet 120 or is blown into the room with the outlet air, which will affect the air outlet effect and the use of the equipment. The insulation structure 900 can avoid the generation of condensation water.

[0084] As a further solution of the above embodiment, the communication port 600 passes through the second heat exchanger 400 .

[0085] The communication port 600 may be a strip-shaped port, with two ends extending to opposite sides of the second heat exchanger 400 respectively, penetrating the second heat exchanger 400 .

[0086] As a further solution of the above embodiment, the communication port 600 has a large ventilation area, so that more gas in the gas flow channel 500 can flow out through the communication port 600 during dehumidification.

[0087] As a further solution of the above embodiment, when the air conditioner indoor unit is in cooling mode or heating mode, the wind shield 700 is in a closed state, so that all the gas in the gas flow channel 500 flows to the air outlet 120 through the second heat exchanger 400;

[0088] When the indoor unit of the air conditioner is in the dehumidification mode, the wind shield 700 is in an open state, so that part of the gas in the gas flow channel 500 flows to the air outlet 120 through the communication port 400 .

[0089] In a further solution of the above embodiment, while ensuring the heat exchange effect of the air in the heating mode and the cooling mode, it is possible to avoid the air outlet temperature of the air outlet 120 being too low in the dehumidification mode.

[0090] It is understandable that the air conditioner indoor unit also includes a processor (such as a central processing unit, CPU), a communication bus, a user interface, a network interface, a memory and other systems for control and communication. Among them, the communication bus is used to realize the connection and communication between these components; the user interface may include a display screen (Display), an input unit such as a key (Keyboard); the network interface may optionally include a standard wired interface, a wireless interface (such as a wireless fidelity WIreless-FIdelity, WI-FI interface); the memory may be a high-speed random access memory (random access memory, RAM), or a stable memory (non-volatile memory), and the memory may optionally be a storage device independent of the aforementioned processor.

[0091] The air conditioner proposed by the present invention includes the above-mentioned air conditioner indoor unit.

[0092] The air conditioning system also includes a compressor, an air conditioning outdoor unit, a four-way valve, a throttling device, etc. The compressor, the four-way valve, the air conditioning outdoor unit, the throttling device and the air conditioning indoor unit are connected through a refrigerant circulation pipeline.

[0093] In cooling mode and dehumidification mode, the refrigerant compressed by the compressor is output through heat exchange in the air-conditioning outdoor unit and throttled by the throttling device, and then enters the first heat exchanger 300 and the second heat exchanger 400 of the air-conditioning indoor unit for heat exchange, and finally returns to the compressor.

[0094] In the heating mode, the refrigerant compressed by the compressor directly enters the first heat exchanger 300 and the second heat exchanger 400 of the air conditioner indoor unit for heat exchange, then enters the throttling device and the air conditioner outdoor unit, and finally returns to the compressor.

[0095] The air conditioner can be a single cabinet type, a wall mounted type, or a central air conditioner, etc. The air conditioner can be a split type or an integrated type.

[0096] Since the air conditioner proposed in the present invention adopts all the technical features of the above-mentioned embodiments of the air conditioner indoor unit, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments of the air conditioner indoor unit, which will not be repeated here.

[0097] The control method of the air conditioner indoor unit proposed by the present invention is used for the above-mentioned air conditioner indoor unit, and the method comprises the steps of:

[0098] When the air conditioner indoor unit is in cooling mode or heating mode, the wind shield 700 is controlled to be in a closed state so that all the gas in the gas flow channel 500 flows to the air outlet 120 through the second heat exchanger 400;

[0099] When the indoor unit of the air conditioner is in the dehumidification mode, the wind shield 700 is controlled to be in an open state, so that part of the gas in the gas flow channel 500 flows to the air outlet 120 through the communication port 600 .

[0100] The control method of the air-conditioning indoor unit proposed in the present invention is used to control each embodiment of the above-mentioned air-conditioning indoor unit, and has at least all the beneficial effects brought by the technical solutions of the embodiments of the above-mentioned air-conditioning indoor unit, which will not be repeated here.

[0101] The method further comprises the step of: when the indoor unit of the air conditioner is in a cooling mode or a dehumidification mode, adjusting the opening degree of the communication port 600 at a preset time interval.

[0102] The steps of adjusting the opening of the communication port 600 include:

[0103] Get the ambient humidity;

[0104] Get the set humidity;

[0105] Calculate the difference between ambient humidity and set humidity;

[0106] Determine the opening adjustment value according to the difference;

[0107] The windshield plate 700 is controlled to adjust the opening of the communication port 600 according to the opening adjustment value;

[0108] When the communication port 600 reaches the maximum opening, the wind shield 700 is no longer controlled to increase the opening of the communication port 600;

[0109] When the communication opening 600 is closed, the wind shield 700 is no longer controlled to reduce the opening of the communication opening 600 .

[0110] The opening adjustment value can be a positive value, a negative value and zero. When the opening adjustment value is a positive value, the wind shield 700 is controlled to increase the opening of the connecting port 600 corresponding to the value; when the opening adjustment value is a negative value, the wind shield 700 is controlled to reduce the opening of the connecting port 600 corresponding to the value; when the opening adjustment value is zero, the wind shield 700 is controlled to keep the opening of the connecting port 600 unchanged.

[0111] When the wind shield plate 700 is rotatably connected to the communication port 600 , the opening degree may correspond to the rotation angle of the wind shield plate 700 .

[0112] When the air-conditioning indoor unit is in cooling mode or dehumidification mode, the opening of the connecting port 600 is adjusted according to a preset time interval. The opening of the connecting port 600 and the amplitude of the opening change can be adjusted according to the indoor humidity and the set humidity. The ratio of the gas flowing to the air outlet 120 through the connecting port 600 and the gas retained in the air outlet 120 through the second heat exchanger 400 is adjusted to adjust the air outlet temperature of the air outlet 120, which can be suitable for different needs.

[0113] The operation mode of the air conditioner indoor unit also includes a heating mode. When the operation mode is the heating mode, the wind shield 700 is controlled to be in a closed state.

[0114] In the step of controlling the windshield plate 700 to adjust the opening of the connecting port 600 according to the opening adjustment value, when the difference is greater than the first preset value and less than or equal to the second preset value, the windshield plate 700 is controlled to increase the opening of the connecting port 600 by the first value; when the difference is greater than the second preset value, the windshield plate 700 is controlled to increase the opening of the connecting port 600 by the second value; when the difference is greater than the third preset value and less than or equal to the first preset value, the position of the windshield plate 700 is controlled to remain unchanged; when the difference is greater than the fourth preset value and less than or equal to the third preset value, the windshield plate 700 is controlled to reduce the opening of the connecting port 600 by the third value; when the difference is less than the fourth preset value, the windshield plate 700 is controlled to reduce the opening of the connecting port 600 by the fourth value; wherein the second value is greater than the first value, and the fourth value is greater than the third value. The first value and the third value may be the same or different, and the second value and the fourth value may be the same or different. Of course, more preset values ​​may also be set so that the difference falls into more spaces, corresponding to increasing or decreasing the opening of more values.

[0115] For example, the opening degree of the open connecting port 600 of the wind shield 700 is divided into N opening degrees, namely V1, V2...Vn, and the opening degree of the open connecting port 600 of the wind shield 700 gradually increases from V1 to Vn. Vn is the maximum opening degree when the connecting port 600 is opened, and V1 is the minimum opening degree when the connecting port 600 is opened. The user sets the humidity to S1, and the obtained ambient humidity is S2. The ambient humidity S2 is obtained once at an interval of T time, and the T time can be set to 1 minute, 3 minutes, 5 minutes or 10 minutes as needed.

[0116] When the air conditioner indoor unit is operating in cooling mode or dehumidification mode:

[0117] When 5%<S1-S2≤10%, the wind shield 700 is controlled to increase the opening of the communication port 600 by one degree, and the opening of the communication port 600 can be opened to Vn at most;

[0118] When 10%<S1-S2≤15%, the wind shield 700 is controlled to increase the opening of the communication port 600 by two openings, and the opening of the communication port 600 can be opened to Vn at most;

[0119] When S1-S2>15%, the wind shield 700 is controlled to increase the opening of the communication port 600 by three openings, and the opening of the communication port 600 can be opened to Vn at most;

[0120] When -5%≤S1-S2≤5%, the wind shield 700 is controlled to keep the current opening of the communication port 600 unchanged.

[0121] When -10%≤S1-S2<-5%, the wind shield 700 is controlled to reduce the opening of the communication port 600 by one opening, and the communication port 600 can be closed at most;

[0122] When -15%≤S1-S2<-10%, the wind shield 700 is controlled to reduce the opening of the communication port 600 by two openings, and the communication port 600 can be closed at most;

[0123] When S1-S2<-15%, the wind shield plate 700 is controlled to reduce the opening of the communication port 600 by three openings, and the communication port 600 can be closed at most.

[0124] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An air conditioner indoor unit, characterized in that: include: A housing having an air inlet and an air outlet; A fan, having an air suction port and an air blowing port, is disposed in the housing, wherein the air suction port is connected to the air inlet, and the air blowing port is connected to the air outlet; A first heat exchanger is disposed in the housing and located between the air outlet and the air outlet; A second heat exchanger is disposed in the housing and is located between the first heat exchanger and the air outlet. The second heat exchanger is spaced apart from the first heat exchanger, and a gas flow channel is defined between the first heat exchanger and the second heat exchanger. The first heat exchanger and the second heat exchanger perform cooling or heating synchronously. A connecting port connecting the air outlet and the gas flow channel; as well as a windshield plate, which is switchably arranged at the communication port between an open state and a closed state, and opens the communication port in the open state and closes the communication port in the closed state; When the air conditioner indoor unit is in cooling mode or heating mode, the wind shield is in the closed state, so that all the gas in the gas flow channel flows to the air outlet through the second heat exchanger; When the air conditioner indoor unit is in the dehumidification mode, the wind shield is in the open state, so that part of the gas in the gas flow channel flows to the air outlet through the connecting port.

2. The air conditioner indoor unit according to claim 1, characterized in that: There is a gap between the second heat exchanger and the housing, and the communication port is formed by the gap between the second heat exchanger and the housing.

3. The air conditioner indoor unit according to claim 2, characterized in that: The fan is a centrifugal fan, the air outlet is close to the top wall of the shell, there is a gap between the top side of the second heat exchanger and the top wall of the shell, and the connecting port is formed by the gap between the top side of the second heat exchanger and the top wall of the shell.

4. The air conditioner indoor unit according to claim 3, characterized in that: The height of the first heat exchanger is greater than that of the second heat exchanger, and the bottom side of the first heat exchanger is flush with the bottom side of the second heat exchanger.

5. The air conditioner indoor unit according to claim 1, characterized in that: The first heat exchanger and the second heat exchanger are arranged in parallel.

6. The air conditioner indoor unit according to claim 5, characterized in that: The first heat exchanger and the second heat exchanger are both arranged tilted, and the top side of the first heat exchanger and the top side of the second heat exchanger are both tilted in a direction away from the air outlet.

7. The air conditioner indoor unit according to claim 1, characterized in that: The wind resistance per unit area of ​​the first heat exchanger is greater than or equal to the wind resistance per unit area of ​​the second heat exchanger.

8. The air conditioner indoor unit according to claim 1, characterized in that: The air conditioner indoor unit also includes: The water receiving tray is arranged in the shell and is located below the first heat exchanger and the second heat exchanger.

9. The air conditioner indoor unit according to claim 1, characterized in that: The open state includes a plurality of different open states, and the wind shield makes the opened communication port at different opening degrees in each of the different open states, and the wind shield is switchably arranged at the communication port between each of the different open states and the closed state.

10. The air conditioner indoor unit according to claim 1, characterized in that: The air conditioner indoor unit also includes: The driving mechanism is arranged in the housing and is used for driving the wind shield to switch between an open state and a closed state.

11. The air conditioner indoor unit according to claim 1, characterized in that: A heat preservation structure is arranged at the air outlet.

12. The air conditioner indoor unit according to claim 1, characterized in that: The communication port penetrates the second heat exchanger.

13. An air conditioner, characterized in that: It comprises an air-conditioning indoor unit as described in any one of claims 1-12.

14. A control method for an air conditioner indoor unit, characterized in that: For use in an air conditioner indoor unit according to any one of claims 1 to 12, the method comprises the steps of: When the air conditioner indoor unit is in cooling mode or heating mode, controlling the wind shield to be in the closed state so that all the gas in the gas flow channel flows to the air outlet through the second heat exchanger; When the air conditioner indoor unit is in the dehumidification mode, the wind shield is controlled to be in the open state, so that part of the gas in the gas flow channel flows to the air outlet through the connecting port.

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