Air conditioner indoor unit and control method thereof

Abstract

The invention provides an air conditioner indoor unit and a control method of the air conditioner indoor unit. The air conditioner indoor unit comprises an indoor unit refrigerant flow path with a liquid collecting opening and an air collecting opening. The indoor unit refrigerant flow path comprises a first evaporator connected between the liquid collecting opening and the gas collecting opening through a refrigerant pipeline. The second evaporator is connected between the liquid collecting port and the gas collecting port through a refrigerant pipeline; the first electromagnetic valve is connected between the first evaporator and the gas collecting port through a refrigerant pipeline; the second electromagnetic valve is connected between the second evaporator and the liquid collecting opening through a refrigerant pipeline; a first port of the throttling device communicates between the first electromagnetic valve and the first evaporator, a second port of the throttling device communicates between the second electromagnetic valve and the second evaporator, the air conditioner indoor unit comprises a dehumidification mode and a non-dehumidification mode, in the dehumidification mode, the first electromagnetic valve and the second electromagnetic valve are closed, and the throttling device is opened; and in the non-dehumidification mode, the first electromagnetic valve and the second electromagnetic valve are opened, and the throttling device is closed. The air conditioner indoor unit has the constant-temperature dehumidification function.

Description

Technical Field

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

[0002] With the significant improvement of people's living standards, residents have increasing requirements for the comfort of their living environment. As an indispensable electrical appliance in modern home life, the performance requirements of household air conditioners are also showing a trend of diversification and refinement.

[0003] The main function of air conditioners is usually cooling or heating, aiming to meet basic seasonal temperature regulation needs. However, during the rainy season or in areas with high humidity, air conditioning systems need to have a dehumidification function to prevent clothes, furniture, etc. from getting moldy due to moisture, while also maintaining indoor temperature. Summary of the invention

[0004] The purpose of the present disclosure is to provide an air conditioner indoor unit and a control method for the air conditioner indoor unit, aiming to solve the problem that the air conditioner does not have a constant temperature dehumidification function.

[0005] The present disclosure provides an indoor unit of an air conditioner according to a first aspect, comprising an indoor unit refrigerant flow path having a liquid collecting port and an air collecting port, wherein the indoor unit refrigerant flow path comprises: a first evaporator connected between the liquid collecting port and the air collecting port through a refrigerant pipeline; a second evaporator connected between the liquid collecting port and the air collecting port through the refrigerant pipeline; a first solenoid valve connected between the first evaporator and the air collecting port through the refrigerant pipeline; a second solenoid valve connected between the second evaporator and the liquid collecting port through the refrigerant pipeline; and a throttling device comprising a first port and a second port, wherein the first port is communicated with the refrigerant pipeline between the first solenoid valve and the first evaporator, and the second port is communicated with the refrigerant pipeline between the second solenoid valve and the second evaporator;

[0006] Wherein, the air conditioner indoor unit includes a dehumidification mode and a non-dehumidification mode. In the dehumidification mode, the first solenoid valve and the second solenoid valve are closed and the throttling device is opened. In the non-dehumidification mode, the first solenoid valve and the second solenoid valve are opened and the throttling device is closed.

[0007] In some embodiments of the air conditioner indoor unit, the refrigerant pipeline includes a refrigerant branch pipe connected in parallel on the refrigerant flow path of the indoor unit, wherein:

[0008] The first evaporator is connected to the liquid collecting port and the first solenoid valve through a set of parallel refrigerant branch pipes; and / or

[0009] The second evaporator is connected to the second solenoid valve and the gas collecting port through a group of parallel refrigerant branch pipes.

[0010] In some embodiments of the air conditioner indoor unit, the refrigerant branch pipe includes a capillary tube section.

[0011] In some embodiments of the air conditioner indoor unit,

[0012] The air conditioner indoor unit comprises a chassis, the indoor unit refrigerant flow path is located in the chassis, and along a first horizontal direction of the chassis, the throttling device is located between the first solenoid valve and the second solenoid valve;

[0013] Along a second horizontal direction of the chassis that is perpendicular to the first direction, the throttling device, the first solenoid valve, and the second solenoid valve are staggeredly arranged.

[0014] In some embodiments of an air-conditioning indoor unit, the air-conditioning indoor unit includes a water receiving tray, which is configured to hold liquid, and the refrigerant pipe includes two longitudinal first solenoid valve connecting pipes, which are respectively connected to the first solenoid valve and the second solenoid valve and are located below the connected first solenoid valve or the second solenoid valve, and one end of the first solenoid valve connecting pipe away from the connected first solenoid valve or the second solenoid valve is higher than the upper edge of the water receiving tray.

[0015] In some embodiments of the air conditioner indoor unit, the height of the throttling device is lower than the first solenoid valve and the second solenoid valve, and the distance between the throttling device and the first solenoid valve and the second solenoid valve is greater than or equal to a preset distance.

[0016] In some embodiments of an air-conditioning indoor unit, the air-conditioning indoor unit includes a chassis, the indoor unit refrigerant flow path is located in the chassis, the chassis includes a chassis opening and a side cover plate, the side cover plate is configured to open or close the chassis opening, and at least one of the first solenoid valve, the second solenoid valve and the throttling device is configured to be exposed to the chassis opening.

[0017] In some embodiments of the air-conditioning indoor unit, the refrigerant pipe includes two second solenoid valve connecting pipes, which are radially connected to the first solenoid valve and the second solenoid valve, respectively, and one end of each second solenoid valve connecting pipe away from the first solenoid valve or the second solenoid valve to which it is connected faces in a direction away from the side cover plate.

[0018] In some embodiments of the air conditioner indoor unit, the side cover plate is split.

[0019] In some embodiments of the air conditioner indoor unit,

[0020] The refrigerant pipeline includes a weld, and at least one of the first solenoid valve, the second solenoid valve and the throttling device is configured to be detachably connected to the remaining pipe sections of the refrigerant pipeline together with the connected pipe section of the refrigerant pipeline through the weld;

[0021] The air conditioner indoor unit comprises a chassis, the indoor unit refrigerant flow path is located in the chassis, the chassis comprises a chassis opening and a side cover plate, the side cover plate is configured to open or close the chassis opening, and the weld is exposed to the chassis opening.

[0022] A second aspect of the present disclosure provides a control method for the air conditioner indoor unit according to the first aspect of the present disclosure, comprising:

[0023] Closing the first solenoid valve and the second solenoid valve and opening the throttling device to put the air conditioner indoor unit in the dehumidification mode;

[0024] The first solenoid valve and the second solenoid valve are opened and the throttling device is closed, so that the air conditioner indoor unit is in the non-dehumidification mode.

[0025] In the control method of some embodiments, the non-dehumidification mode includes a cooling mode and a heating mode, and the control method further includes:

[0026] In the cooling mode, liquid refrigerant is introduced from the liquid collecting port;

[0027] In the heating mode, gaseous refrigerant is introduced from the gas collecting port.

[0028] Based on the air-conditioning indoor unit provided by the present invention, the air-conditioning indoor unit includes an indoor unit refrigerant flow path, and the indoor unit refrigerant flow path includes a first evaporator, a second evaporator, a first solenoid valve, a second solenoid valve and a throttling device. The first evaporator and the second evaporator are respectively connected between a liquid collecting port and an air collecting port of the air-conditioning indoor unit, the first solenoid valve is connected between the first evaporator and the air collecting port, and the second solenoid valve is connected between the second evaporator and the liquid collecting port. The throttling device includes a first port and a second port. The first port is connected to the refrigerant pipeline between the first solenoid valve and the first evaporator, and the second port is connected to the refrigerant pipeline between the second solenoid valve and the second evaporator. The air-conditioning indoor unit includes a dehumidification mode and a non-dehumidification mode. In the dehumidification mode, the first solenoid valve and the second solenoid valve are closed and the throttling device is opened. In the non-dehumidification mode, the first solenoid valve and the second solenoid valve are opened and the throttling device is closed. The air-conditioning indoor unit is conducive to switching between dehumidification mode and non-dehumidification mode through the opening and closing of the first solenoid valve, the second solenoid valve and the throttling device. In the dehumidification mode, the refrigerant first flows through the first evaporator in the refrigerant flow path of the indoor unit to release heat and heat up, and then flows through the throttling device and the second evaporator to absorb heat and cool down to condense the water vapor in the air and realize heat exchange offset, which is conducive to achieving the purpose of constant temperature dehumidification.

[0029] The control method disclosed in the present invention is based on the air-conditioning indoor unit disclosed in the present invention, and thus has the advantages of the air-conditioning indoor unit disclosed in the present invention.

[0030] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0032] Figure 1 It is a refrigerant flow diagram of an indoor unit of an air conditioner indoor unit according to an embodiment of the present disclosure;

[0033] Figure 2 A refrigerant flow diagram of an indoor unit according to another embodiment of the present disclosure;

[0034] Figure 3 This is a structural schematic diagram of an air-conditioning indoor unit according to an embodiment of the present disclosure;

[0035] Figure 4 for Figure 3 A schematic diagram of the structure of the indoor unit of the air conditioner from a top view is shown;

[0036] Figure 5 for Figure 3 A side structural diagram of an air conditioner indoor unit is shown;

[0037] Figure 6 for Figure 3 The schematic diagram of the structure of the indoor refrigerant flow path of the indoor unit of the air conditioner is shown.

[0038] Figure 1-6 In the figure, each reference numeral represents:

[0039] 1. chassis, 1a. chassis opening, 11. side cover, 11A. first cover, 11B. second cover, A. first direction, B. second direction;

[0040] 5. Water tray;

[0041] 6. Liquid collecting joint;

[0042] 7. Gas collecting joint;

[0043] 100, refrigerant pipeline, 100a, liquid collecting port, 100b, gas collecting port, 101, weld, 110, refrigerant branch pipe, 1101, capillary section, 111, first solenoid valve connecting pipe, 112, second solenoid valve connecting pipe, 113, first expansion valve connecting pipe, 114, second expansion valve connecting pipe, 201, first evaporator, 202, second evaporator, 301, first solenoid valve, 302, second solenoid valve, 400, throttling device, 400a, first port, 400b, second port. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0045] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0046] In the description of the present disclosure, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present disclosure.

[0047] In the description of the present disclosure, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, upright, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present disclosure; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0048] In the following description, the first direction A corresponds to Figure 4 and Figure 5 The direction represented by the arrow A corresponds to the width direction of the chassis; the second direction B corresponds to Figure 4 The direction represented by the arrow B corresponds to the length direction of the chassis.

[0049] like Figure 1As shown, an embodiment of the present disclosure provides an indoor unit of an air conditioner. The indoor unit of the air conditioner includes an indoor unit refrigerant flow path having a liquid collecting port 100a and an air collecting port 100b. The indoor unit refrigerant flow path includes a first evaporator 201, a second evaporator 202, a first solenoid valve 301, a second solenoid valve 302 and a throttling device 400. The first evaporator 201 is connected between the liquid collecting port 100a and the air collecting port 100b through a refrigerant pipe 100. The second evaporator 202 is connected between the liquid collecting port 100a and the air collecting port 100b through a refrigerant pipe 100. The first solenoid valve 301 is connected between the first evaporator 201 and the air collecting port 100b through a refrigerant pipe 100. The second solenoid valve 302 is connected between the second evaporator 202 and the liquid collecting port 100a through a refrigerant pipe 100. The throttling device 400 includes a first port 400a and a second port 400b, the first port 400a is connected to the refrigerant pipe 100 between the first solenoid valve 301 and the first evaporator 201, and the second port 400b is connected to the refrigerant pipe 100 between the second solenoid valve 302 and the second evaporator 202. The air conditioner indoor unit includes a dehumidification mode and a non-dehumidification mode. In the dehumidification mode, the first solenoid valve 301 and the second solenoid valve 302 are closed and the throttling device 400 is opened, and in the non-dehumidification mode, the first solenoid valve 301 and the second solenoid valve 302 are opened and the throttling device 400 is closed.

[0050] Based on the air-conditioning indoor unit provided by the present disclosure, the air-conditioning indoor unit includes an indoor unit refrigerant flow path, and the indoor unit refrigerant flow path includes a first evaporator 201, a second evaporator 202, a first solenoid valve 301, a second solenoid valve 302 and a throttling device 400, the first evaporator 201 and the second evaporator 202 are respectively connected between the liquid collecting port 100a and the gas collecting port 100b of the air-conditioning indoor unit, the first solenoid valve 301 is connected between the first evaporator 201 and the gas collecting port 100b, the second solenoid valve 302 is connected between the second evaporator 202 and the liquid collecting port 100a, and the throttling device The device 400 includes a first port 400a and a second port 400b, the first port 400a is connected to the refrigerant pipeline between the first solenoid valve 301 and the first evaporator 201, the second port 400b is connected to the refrigerant pipeline 100 between the second solenoid valve 302 and the second evaporator 202, and the air conditioner indoor unit includes a dehumidification mode and a non-dehumidification mode. In the dehumidification mode, the first solenoid valve 301 and the second solenoid valve 302 are closed and the throttling device 400 is opened. In the non-dehumidification mode, the first solenoid valve 301 and the second solenoid valve 302 are opened and the throttling device 400 is closed. The air-conditioning indoor unit is facilitated to switch between dehumidification mode and non-dehumidification mode by opening and closing the first solenoid valve 301, the second solenoid valve 302 and the throttling device 400. In the dehumidification mode, the refrigerant first flows through the first evaporator 201 in the refrigerant flow path of the indoor unit to release heat and heat up, and then flows through the throttling device 400 and the second evaporator 202 to absorb heat and cool down so that the water vapor in the air condenses and realizes heat exchange offset, which is conducive to achieving the purpose of constant temperature dehumidification.

[0051] In some embodiments, the air-conditioning indoor unit may include a control device, which is signal-connected to the throttling device 400, the first solenoid valve 301 and the second solenoid valve 302, and is configured to control the opening and closing of the throttling device 400, the first solenoid valve 301 and the second solenoid valve 302 so that the air-conditioning indoor unit can switch between a dehumidification mode and a non-dehumidification mode.

[0052] The control device can be implemented as a general processor, a programmable logic controller (PLC), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any appropriate combination thereof for performing the functions described in the present disclosure.

[0053] like Figure 2 and Figure 6 As shown, in some embodiments, the refrigerant pipeline 100 includes a refrigerant branch pipe 110 connected in parallel on the refrigerant flow path of the indoor unit. The first evaporator 201 is connected to the liquid collecting port 100a and the first solenoid valve 301 through a group of parallel refrigerant branch pipes 110. The second evaporator 202 is connected to the second solenoid valve 302 and the gas collecting port 100b through a group of parallel refrigerant branch pipes 110.

[0054] The parallel refrigerant branch pipes 110 are provided to facilitate the diversion of the refrigerant in the refrigerant flow path of the indoor unit, facilitate the flow and heat exchange of the refrigerant in the diverted flow path in the first evaporator 201 or the second evaporator 202, and facilitate the improvement of the efficiency of the refrigerant's evaporation heat absorption or condensation heat release, thereby facilitating the improvement of the working efficiency of the air-conditioning indoor unit.

[0055] like Figure 2 and Figure 6 As shown, in some embodiments, the refrigerant branch pipe 110 includes a capillary tube section 1101 .

[0056] The capillary section 1101 is conducive to reducing the pressure and temperature of the liquid refrigerant and regulating the flow of the refrigerant flowing through the capillary section 1101. If the pressure difference at both ends of the capillary section 1101 changes due to the change of the heat load, when the pressure difference increases, the refrigerant flow rate will increase, but because the flow resistance also increases at the same time, the amount of flash gas in the capillary section 1101 increases, thereby suppressing the excessive increase of the flow rate. On the contrary, when the pressure difference decreases, the capillary section 1101 is conducive to suppressing the excessive reduction of the flow rate. This suppression ability of the capillary section 1101 can prevent the excessive increase of the refrigerant flow rate when the condensation pressure increases due to the increase of the ambient temperature, or when the evaporation temperature decreases due to the decrease of the load. On the contrary, the capillary section 1101 can also prevent the excessive reduction of the refrigerant flow rate due to the decrease of the condensation pressure or the increase of the evaporation temperature, thereby helping to improve the effect of the constant temperature dehumidification of the air conditioner indoor unit.

[0057] like Figure 2 and Figure 6 As shown, the first evaporator 201 is connected to the liquid collecting port 100a through a set of parallel refrigerant branch pipes 110 including capillary sections 1101.

[0058] The first evaporator 201 is connected to the liquid collecting port 100a through the capillary section 1101, which is beneficial to the diversion or confluence of the refrigerant in the refrigerant pipe 100 between the liquid collecting port 100a and the first evaporator 201 in the non-dehumidification mode. It is also beneficial to control the refrigerant flow rate through the throttling effect of the capillary section 1101, which is beneficial to adjust the heat exchange effects of different flow paths, and further beneficial to improve the heat exchange uniformity.

[0059] like Figure 4 and Figure 5As shown, in some embodiments, the indoor unit of the air conditioner includes a chassis 1, and the indoor unit refrigerant flow path is located in the chassis 1. Along the horizontal first direction A of the chassis 1, the throttling device 400 is located between the first solenoid valve 301 and the second solenoid valve 302.

[0060] On the one hand, considering the space limitation in the chassis 1, since the first port 400a of the throttling device 400 is connected to the refrigerant pipe 100 between the first solenoid valve 301 and the first evaporator 201, and the second port 400b is connected to the refrigerant pipe 100 between the second solenoid valve 302 and the second evaporator 202, the arrangement of arranging the throttling device 400 between the first solenoid valve 301 and the second solenoid valve 302 along the first direction A is conducive to shortening the length of the refrigerant pipe 100, avoiding the refrigerant pipe 100 from being arranged far away, thereby facilitating a compact structural space. On the other hand, considering the welding position of the refrigerant pipe 100, such an arrangement is conducive to providing an operating space for welding, avoiding the occurrence of reverse welding and over-welding, thereby facilitating extending the service life of the indoor unit of the air conditioner.

[0061] like Figure 4 As shown, in some embodiments, along a horizontal second direction B perpendicular to the first direction A of the chassis 1 , the throttling device 400 , the first solenoid valve 301 , and the second solenoid valve 302 are staggeredly arranged.

[0062] This arrangement is conducive to providing sufficient installation space for the throttling device 400, the first solenoid valve 301 and the second solenoid valve 302, and is conducive to improving assembly reliability.

[0063] like Figure 4 As shown, along the second direction B, the first solenoid valve 301 is closer to the side cover plate 11 of the chassis 1 than the second solenoid valve 302 and the throttling device 400. In other embodiments (not shown), the second solenoid valve 302 may also be closer to the side cover plate 11 of the chassis 1 than the first solenoid valve 301 and the throttling device 400, or the throttling device 400 may also be closer to the side cover plate 11 of the chassis 1 than the first solenoid valve 301 and the second solenoid valve 302, as long as the three are arranged in a staggered manner along the second direction B.

[0064] like Figure 5 As shown, in some embodiments, the indoor unit of the air conditioner includes a water receiving tray 5. The water receiving tray 5 is configured to contain liquid. The refrigerant pipeline 100 includes two longitudinal first solenoid valve connecting pipes 111. The two first solenoid valve connecting pipes 111 are respectively connected to the first solenoid valve 301 and the second solenoid valve 302 and are located below the connected first solenoid valve 301 or the second solenoid valve 302. One end of the first solenoid valve connecting pipe 111 away from the connected first solenoid valve 301 or the second solenoid valve 302 is higher than the upper edge of the water receiving tray 5.

[0065] This arrangement helps to avoid rust caused by the end of the first solenoid valve connecting pipe 111 away from the connected first solenoid valve 301 or second solenoid valve 302 being immersed in the liquid in the water receiving tray 5, thereby helping to extend the service life of the refrigerant pipe 100 and maintain the working efficiency of the air-conditioning indoor unit.

[0066] In some embodiments, the end of the first solenoid valve connecting pipe 111 away from the connected first solenoid valve 301 or the second solenoid valve 302 is located at a position greater than or equal to 15 mm above the upper edge of the water receiving tray 5 .

[0067] like Figure 4 and Figure 5 As shown, the height of the throttling device 400 is lower than that of the first solenoid valve 301 and the second solenoid valve 302, and the distance between the throttling device 400 and the first solenoid valve 301 and the second solenoid valve 302 is greater than or equal to a preset distance.

[0068] Since the throttling device 400, the first solenoid valve 301 and the second solenoid valve 302 all include cylindrical coils, and the radial dimensions of the coils are relatively large, setting the preset distance between the throttling device 400 and the first solenoid valve 301 and the second solenoid valve 302 to be greater than or equal to the preset distance is conducive to avoiding interference between the coils of the throttling device 400, the first solenoid valve 301 and the second solenoid valve 302. On the other hand, setting the height of the throttling device 400 lower than the first solenoid valve 301 and the second solenoid valve 302 is conducive to reducing the height of the coil of the throttling device 400, thereby providing sufficient installation space for the shock-absorbing damping block (set outside the valve body of the throttling device 400) to reduce the sound of the liquid flow through the refrigerant flow path of the indoor unit, reduce the noise value, and improve the comfort of the indoor unit of the air conditioner.

[0069] In some embodiments, the preset distance may be, for example, 10 mm.

[0070] like Figure 3 As shown, in some embodiments, the indoor unit of the air conditioner includes a chassis 1. The indoor unit refrigerant flow path is located in the chassis 1. The chassis 1 includes a chassis opening 1a and a side cover plate 11. The side cover plate 11 is configured to open or close the chassis opening 1a. At least one of the first solenoid valve 301, the second solenoid valve 302 and the throttling device 400 is configured to be exposed to the chassis opening 1a.

[0071] Providing at least one of the first solenoid valve 301, the second solenoid valve 302 and the throttling device 400 to be exposed to the chassis opening 1a is conducive to facilitating the installation, disassembly, maintenance and inspection of the first solenoid valve 301, the second solenoid valve 302 and the throttling device 400 exposed to the chassis opening 1a, and is conducive to preventing the refrigerant pipe 100 from being blocked between the chassis opening 1a and the first solenoid valve 301, the second solenoid valve 302 and the throttling device 400, so as to facilitate the detection of whether the first solenoid valve 301, the second solenoid valve 302 and the throttling device 400 are working normally by using a detection tool (for example: an electromagnetic pen).

[0072] like Figure 4 As shown, in some embodiments, the refrigerant pipeline 100 includes two second solenoid valve connecting pipes 112. The two second solenoid valve connecting pipes 112 are radially connected to the first solenoid valve 301 and the second solenoid valve 302 respectively. One end of each second solenoid valve connecting pipe 112 away from the first solenoid valve 301 or the second solenoid valve 302 connected thereto faces away from the side cover plate 11.

[0073] Arranging one end of the second solenoid valve connecting pipe 112 away from the first solenoid valve 301 or the second solenoid valve 302 to which it is connected to face in a direction away from the side cover plate 11 is beneficial to extending the second solenoid valve connecting pipe 112 in a direction away from the side cover plate 11, and is beneficial to shortening the distance between the first solenoid valve 301 and the second solenoid valve 302 and the side cover plate 11, thereby helping to avoid operational difficulties when repairing and disassembling the coil and improving maintenance efficiency.

[0074] like Figure 4 As shown, in some embodiments, the side cover plate 11 is split.

[0075] Setting the side cover plate 11 to be split is conducive to inspecting part of the indoor unit refrigerant flow path by removing part of the side cover plate 11, which is conducive to reducing the time spent on installing and removing the side cover plate 11, thereby improving the efficiency of inspection.

[0076] like Figure 5 and Figure 6 As shown, in some embodiments, the refrigerant pipe 100 includes a weld 101. At least one of the first solenoid valve 301, the second solenoid valve 302, and the throttling device 400 is configured to be detachably connected to the remaining pipe sections of the refrigerant pipe 100 together with the connected part of the refrigerant pipe 100 through the weld 101. The weld 101 is exposed to the chassis opening 1a.

[0077] The weld 101 of the refrigerant pipe 100 is exposed at the opening 1a, which is beneficial for the welding gun to directly extend into the weld 101 for convenient disassembly or maintenance without bypassing the refrigerant pipe 100 after removing the side cover plate 11, thereby improving operability.

[0078] Another aspect of the disclosed embodiment provides a control method for an air conditioner indoor unit, the control method comprising closing the first solenoid valve 301 and the second solenoid valve 302 and opening the throttling device 400, so that the air conditioner indoor unit is in a dehumidification mode. Alternatively, the first solenoid valve 301 and the second solenoid valve 302 are opened and the throttling device 400 is closed, so that the air conditioner indoor unit is in a non-dehumidification mode.

[0079] The control method of the embodiment of the present disclosure has the advantages of the air conditioner indoor unit of the embodiment of the present disclosure.

[0080] In some embodiments, the non-dehumidification mode includes a cooling mode and a heating mode. The control method further includes introducing liquid refrigerant from the liquid collecting port 100a in the cooling mode, and introducing gaseous refrigerant from the gas collecting port 100b in the heating mode.

[0081] This control method makes it possible to switch between cooling mode and heating mode without switching the opening and closing states of the first solenoid valve 301, the second solenoid valve 302 and the throttling device 400, thereby improving the working efficiency of the air-conditioning indoor unit in non-dehumidification mode.

[0082] The following combination Figures 2 to 6 The air conditioner indoor unit and control method of the embodiment of the present disclosure are described in detail. To simplify the description, the "left" and "right" directions referred to below correspond to Figure 4 The up and down directions and Figure 5 The left and right directions in the following are referred to as the "front" and "rear" directions corresponding to Figure 4 The left and right direction in .

[0083] like Figure 2 As shown, the indoor unit of the air conditioner includes a chassis 1, a water receiving pan 5, and a refrigerant flow path of the indoor unit. The refrigerant flow path of the indoor unit is located in the chassis 1. The water receiving pan 5 is located in the chassis 1 and is configured to contain liquid to contain water droplets liquefied due to refrigeration. The water receiving pan 5 and the refrigerant flow path of the indoor unit are both located in the chassis 1, and the space structure is compact, which is conducive to reducing the size of the indoor unit of the air conditioner, thereby facilitating the installation flexibility of the indoor unit of the air conditioner.

[0084] The refrigerant flow path of the indoor unit includes a liquid collecting port 100a, an air collecting port 100b, a refrigerant pipe 100, a first evaporator 201, a second evaporator 202, a first solenoid valve 301, a second solenoid valve 302 and a throttling device 400. The throttling device 400 is an electronic expansion valve. The first evaporator 201 is connected between the liquid collecting port 100a and the air collecting port 100b through the refrigerant pipe 100. The second evaporator 202 is connected between the liquid collecting port 100a and the air collecting port 100b through the refrigerant pipe 100. The first solenoid valve 301 is connected between the first evaporator 201 and the air collecting port 100b through the refrigerant pipe 100. The second solenoid valve 302 is connected between the second evaporator 202 and the liquid collecting port 100a through the refrigerant pipe 100. The throttling device 400 includes a first port 400a and a second port 400b, the first port 400a is connected to the refrigerant pipe 100 between the first solenoid valve 301 and the first evaporator 201, and the second port 400b is connected to the refrigerant pipe 100 between the second solenoid valve 302 and the second evaporator 202. The air conditioner indoor unit includes a dehumidification mode and a non-dehumidification mode. In the dehumidification mode, the first solenoid valve 301 and the second solenoid valve 302 are closed and the throttling device 400 is opened, and in the non-dehumidification mode, the first solenoid valve 301 and the second solenoid valve 302 are opened and the throttling device 400 is closed.

[0085] The air-conditioning indoor unit is facilitated to switch between dehumidification mode and non-dehumidification mode by opening and closing the first solenoid valve 301, the second solenoid valve 302 and the throttling device 400. In the dehumidification mode, the refrigerant first flows through the first evaporator 201 in the refrigerant flow path of the indoor unit to condense and release heat, and then flows through the throttling device 400 and the second evaporator 202 to evaporate and absorb heat to achieve heat exchange offset, thereby facilitating the purpose of constant temperature dehumidification.

[0086] like Figure 2 and Figure 6 As shown, the refrigerant pipeline 100 includes a refrigerant branch pipe 110 connected in parallel on the refrigerant flow path of the indoor unit. The first evaporator 201 is connected to the liquid collecting port 100a and the first solenoid valve 301 through a group of parallel refrigerant branch pipes 110, and the refrigerant branch pipe 110 between the first evaporator 201 and the liquid collecting port 100a is a capillary section 1101. The second evaporator 202 is connected to the second solenoid valve 302 and the gas collecting port 100b through a group of parallel refrigerant branch pipes 110.

[0087] Considering the size of the internal space of the chassis 1, the size of the indoor unit refrigerant flow path along the first direction A does not exceed 190 mm, the size of the indoor unit refrigerant flow path along the second direction B does not exceed 250 mm, and the height size of the indoor unit refrigerant flow path does not exceed 160 mm.

[0088] like Figure 4 and Figure 5As shown, along the width direction of the chassis 1, the throttling device 400 is located between the first solenoid valve 301 and the second solenoid valve 302. Taking the outer wall of the chassis 1 close to the first solenoid valve 301 along the width direction as the first reference surface, the interval range of the distance (dimension C) between the center of the valve body of the first solenoid valve 301 and the first reference surface is (30, 70) mm. The interval range of the distance (dimension E) between the center of the valve body of the second solenoid valve 302 and the first reference surface is (150, 200) mm. The interval range of the distance (dimension D) between the center of the valve body of the throttling device 400 and the first reference surface is (80, 140) mm.

[0089] like Figure 3 As shown, the chassis 1 includes a chassis opening 1a and a side cover 11. The side cover 11 is configured to open or close the chassis opening 1a. The first solenoid valve 301, the second solenoid valve 302 and the throttling device 400 are exposed to the chassis opening 1a.

[0090] like Figure 5 and Figure 6 As shown, the refrigerant pipeline 100 includes two first solenoid valve connecting pipes 111, two second solenoid valve connecting pipes 112, a first expansion valve connecting pipe 113 and a second expansion valve connecting pipe 114. The axes of the valve bodies of the throttling device 400, the first solenoid valve 301 and the second solenoid valve 302 all extend in the vertical direction. The first solenoid valve 301 and the second solenoid valve 302 are connected to the refrigerant pipeline 100 through a first solenoid valve connecting pipe 111 and a second solenoid valve connecting pipe 112, respectively. The throttling device 400 is connected to the refrigerant pipeline 100 through the first expansion valve connecting pipe 113 and the second expansion valve connecting pipe 114. The refrigerant pipeline 100 also includes a weld 101. The weld 101 is respectively provided at one end of the first solenoid valve connecting pipe 111 away from the first solenoid valve 301 or the second solenoid valve 302 connected to the first solenoid valve connecting pipe 111, one end of the second solenoid valve connecting pipe 112 away from the first solenoid valve 301 or the second solenoid valve 302 connected to the second solenoid valve connecting pipe 112, and one end of the first expansion valve connecting pipe 113 and the second expansion valve connecting pipe 114 away from the throttling device 400. The first solenoid valve 301, the second solenoid valve 302 and the throttling device 400 are configured to be detachably connected to the remaining pipe sections of the refrigerant pipe 100 together with the connected part of the refrigerant pipe 100 (the first solenoid valve connecting pipe 111, the second solenoid valve connecting pipe 112, the first expansion valve connecting pipe 113 and the second expansion valve connecting pipe 114) through the weld 101. The welds 101 of the refrigerant pipe 100 are all exposed to the chassis opening 1a.

[0091] like Figure 5As shown, when the indoor air is cooled by the first evaporator 201 or the second evaporator 202, the indoor air liquefies to form small water droplets due to the cooling of the air and drips into the water receiving tray 5. The two first solenoid valve connecting pipes 111 are respectively connected to the bottom of the first solenoid valve 301 and the second solenoid valve 302, and the first solenoid valve connecting pipe 111 extends longitudinally. The water receiving tray 5 is located at the bottom of the chassis 1 and is configured in a bowl shape. The lower pipe opening of the first solenoid valve connecting pipe 111 is located above the upper edge of the water receiving tray 5 to prevent the first solenoid valve connecting pipe 111 from being soaked and rusted in the liquid in the water receiving tray 5. Taking the bottom surface of the chassis 1 as the second reference surface, the interval range of the distance (dimension A) from the vertex of the first solenoid valve 301 or the second solenoid valve 302 to the second reference surface is (140, 160) mm.

[0092] like Figure 5 As shown, the throttling device 400 includes a coil located at the top of the throttling device 400, and the first solenoid valve 301 and the second solenoid valve 302 respectively include coils located at the top thereof. The height of the throttling device 400 is lower than the first solenoid valve 301 and the second solenoid valve 302, and the preset distance between the throttling device 400 and the first solenoid valve 301 and the second solenoid valve 302 is greater than or equal to 10 mm. The preset distance is the minimum distance between the coils. The interval range of the distance (dimension B) from the vertex of the throttling device 400 to the second reference surface is (110, 130) mm.

[0093] like Figures 4 to 6 As shown, the two second solenoid valve connecting pipes 112 are radially connected to the first solenoid valve 301 and the second solenoid valve 302 respectively. The second solenoid valve connecting pipe 112 connected to the first solenoid valve 301 extends from the valve body of the first solenoid valve 301 to the right rear direction. The second solenoid valve connecting pipe 112 connected to the second solenoid valve 302 extends from the valve body of the second solenoid valve 302 to the left rear direction. The arrangement of the two second solenoid valve connecting pipes 112 is conducive to making full use of the space in the chassis 1, and is conducive to making the first solenoid valve 301 and the second solenoid valve 302 close to the side cover plate 11 and exposed to the chassis opening 1a. Taking the surface of the side cover plate 11 away from the refrigerant flow path of the indoor unit as the third reference surface, the interval range of the distance (dimension F) from the valve body center of the first solenoid valve 301 and the second solenoid valve 302 to the third reference surface is (30, 80) mm.

[0094] like Figure 4 As shown, along the length direction of the chassis 1, the first solenoid valve 301, the second solenoid valve 302 and the throttling device 400 are sequentially arranged away from the side cover plate 11 in a staggered manner. The distance (dimension G) from the valve body center of the throttling device 400 to the third reference surface is in the range of (70, 100) mm.

[0095] like Figure 3 and Figure 4 As shown, the air conditioner indoor unit also includes a liquid collecting joint 6 and an air collecting joint 7. The liquid collecting joint 6 is connected to the liquid collecting port 100a and passes through the side cover plate 11 along the second direction B. The air collecting joint 7 is connected to the air collecting port 100b and passes through the side cover plate 11 along the second direction B. The side cover plate 11 is a split type, including a first cover plate 11A and a second cover plate 11B. The first cover plate 11A and the second cover plate 11B are detachably connected to the chassis 1. When the first cover plate 11A is removed, the second solenoid valve 302 is in a visible state. When the second cover plate 11B is removed, the first solenoid valve 301 and the throttling device 400 are in a visible state. The side cover plate 11 includes two mounting holes, and the two mounting holes are configured to install the liquid collecting joint 6 and the air collecting joint 7. The edges of the first cover plate 11A and the second cover plate 11B respectively include a portion of the edges of the mounting holes, so that when the first cover plate 11A and the second cover plate 11B are assembled into the side cover plate 11, the edges of the first cover plate 11A and the second cover plate 11B can simultaneously assemble two mounting holes. This arrangement is conducive to positioning the installation positions of the first cover plate 11A and the second cover plate 11B through the assembled mounting holes.

[0096] The air-conditioning indoor unit and the air-conditioning outdoor unit of the embodiment of the present application are used together to form an air-conditioning unit. The air-conditioning outdoor unit includes a compressor, a condenser and a unit throttling device connected by a refrigerant pipeline. For an air-conditioning unit that can achieve both cooling and heating, it also includes a four-way valve for switching the flow direction of the refrigerant. The unit throttling device can be opened to a larger degree in the dehumidification mode so that the condenser and the first evaporator 201 both release heat, while the second evaporator 202 absorbs heat. In the non-dehumidification mode, the first evaporator 201 and the second evaporator 202 of the unit throttling device are connected in parallel, and can absorb heat at the same time in the cooling mode, or release heat at the same time in the heating mode.

[0097] The control method of the indoor unit of the air conditioner according to this embodiment is described in detail below.

[0098] The first solenoid valve 301 and the second solenoid valve 302 are closed and the throttling device 400 is opened, so that the indoor unit of the air conditioner is in the dehumidification mode.

[0099] The first solenoid valve 301 and the second solenoid valve 302 are opened and the throttling device 400 is closed, and liquid refrigerant is introduced from the liquid collecting port 100a to put the indoor unit of the air conditioner in a cooling mode other than a dehumidification mode.

[0100] The first solenoid valve 301 and the second solenoid valve 302 are opened and the throttling device 400 is closed, and the gaseous refrigerant is introduced from the air collecting port 100b to put the indoor unit of the air conditioner in a cooling mode other than a dehumidification mode.

[0101] The principles of using the air conditioner indoor unit to achieve cooling, heating and dehumidification are as follows:

[0102] like Figure 2As shown, in the cooling mode: liquid refrigerant enters from the liquid collecting port 100a, a part of the liquid refrigerant enters the first evaporator 201 through the refrigerant branch pipe 110 including the capillary section 1101, and another part of the liquid refrigerant enters the second evaporator 202 through the refrigerant branch pipe 110 not including the capillary section 1101. The liquid refrigerant is converted into gaseous refrigerant in the first evaporator 201 and the second evaporator 202 and absorbs heat, and finally the gaseous refrigerant flows out of the air conditioner indoor unit from the first evaporator 201 and the second evaporator 202 to the gas collecting port 100b respectively.

[0103] like Figure 2 As shown, in the heating mode: the gaseous refrigerant enters from the gas collecting port 100b, a part of the gaseous refrigerant enters the first evaporator 201 and flows to the liquid collecting port 100a through the refrigerant branch pipe 110 including the capillary section 1101, and another part of the gaseous refrigerant enters the second evaporator 202 and flows to the gas collecting port 100b through the refrigerant branch pipe 110 not including the capillary section 1101. The gaseous refrigerant is converted into liquid refrigerant in the first evaporator 201 and the second evaporator 202 and releases heat, and finally the liquid refrigerant flows out of the air conditioner indoor unit from the liquid collecting port 100a respectively.

[0104] like Figure 2 As shown, in the dehumidification mode: the liquid refrigerant enters the refrigerant flow path of the indoor unit from the liquid collecting port 100a, enters the first evaporator 201 through the refrigerant branch pipe 110 including the capillary section 1101, and realizes heat release and temperature rise. Subsequently, the refrigerant flows from the first evaporator 201 to the throttling device 400 for throttling, and then enters the second evaporator 202 through the refrigerant branch pipe 110 not including the capillary section 1101, and realizes heat absorption and temperature reduction. Due to the temperature reduction, water vapor is liquefied on the second evaporator 202, thereby reducing the air humidity, and the second evaporator 202 and the first evaporator 201 realize heat exchange offset, thereby realizing the constant temperature dehumidification function.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution for protection requested by the present disclosure.

Claims

1. An indoor unit of an air conditioner, comprising an indoor unit refrigerant flow path having a liquid collecting port (100a) and an air collecting port (100b), characterized in that: The indoor unit refrigerant flow path includes: A first evaporator (201) is connected between the liquid collecting port (100a) and the gas collecting port (100b) via a refrigerant pipe (100); A second evaporator (202) connected between the liquid collecting port (100a) and the gas collecting port (100b) via the refrigerant pipe (100); A first solenoid valve (301) connected between the first evaporator (201) and the gas collecting port (100b) via the refrigerant pipeline (100); a second solenoid valve (302) connected between the second evaporator (202) and the liquid collecting port (100a) via the refrigerant pipe (100); and The throttling device (400) comprises a first port (400a) and a second port (400b), wherein the first port (400a) is connected to the refrigerant pipeline (100) between the first solenoid valve (301) and the first evaporator (201), and the second port (400b) is connected to the refrigerant pipeline (100) between the second solenoid valve (302) and the second evaporator (202); The air conditioner indoor unit includes a dehumidification mode and a non-dehumidification mode. In the dehumidification mode, the first solenoid valve (301) and the second solenoid valve (302) are closed and the throttling device (400) is opened. In the non-dehumidification mode, the first solenoid valve (301) and the second solenoid valve (302) are opened and the throttling device (400) is closed.

2. The air conditioner indoor unit according to claim 1, characterized in that: The refrigerant pipeline (100) includes a refrigerant branch pipe (110) connected in parallel on the refrigerant flow path of the indoor unit, wherein: The first evaporator (201) is connected to the liquid collecting port (100a) and the first solenoid valve (301) via a set of parallel refrigerant branch pipes (110); and / or The second evaporator (202) is connected to the second solenoid valve (302) and the gas collecting port (100b) via a set of parallel refrigerant branch pipes (110).

3. The air conditioner indoor unit according to claim 2, characterized in that: The refrigerant branch pipe (110) comprises a capillary tube section (1101).

4. The air conditioner indoor unit according to any one of claims 1 to 3, characterized in that: The air conditioner indoor unit comprises a chassis (1), the indoor unit refrigerant flow path is located in the chassis (1), and along a first horizontal direction (A) of the chassis (1), the throttling device (400) is located between the first solenoid valve (301) and the second solenoid valve (302); Along a horizontal second direction (B) of the chassis (1) that is perpendicular to the first direction (A), the throttling device (400), the first solenoid valve (301), and the second solenoid valve (302) are arranged in a staggered manner.

5. The air conditioner indoor unit according to any one of claims 1 to 3, characterized in that: The air conditioner indoor unit comprises a water receiving tray (5), wherein the water receiving tray (5) is configured to contain liquid, and the refrigerant pipe (100) comprises two longitudinal first solenoid valve connecting pipes (111), wherein the two first solenoid valve connecting pipes (111) are respectively connected to the first solenoid valve (301) and the second solenoid valve (302) and are located below the connected first solenoid valve (301) or the second solenoid valve (302), and an end of the first solenoid valve connecting pipe (111) away from the connected first solenoid valve (301) or the second solenoid valve (302) is higher than an upper edge of the water receiving tray (5).

6. The air conditioner indoor unit according to any one of claims 1 to 3, characterized in that: The height of the throttling device (400) is lower than that of the first solenoid valve (301) and the second solenoid valve (302), and the distance between the throttling device (400) and the first solenoid valve (301) and the second solenoid valve (302) is greater than or equal to a preset distance.

7. The air conditioner indoor unit according to any one of claims 1 to 3, characterized in that: The air conditioner indoor unit comprises a chassis (1), the indoor unit refrigerant flow path is located in the chassis (1), the chassis (1) comprises a chassis opening (1a) and a side cover plate (11), the side cover plate (11) is configured to open or close the chassis opening (1a), and at least one of the first solenoid valve (301), the second solenoid valve (302) and the throttling device (400) is configured to be exposed to the chassis opening (1a).

8. The air conditioner indoor unit according to claim 7, characterized in that: The refrigerant pipe (100) includes two second solenoid valve connecting pipes (112), and the two second solenoid valve connecting pipes (112) are radially connected to the first solenoid valve (301) and the second solenoid valve (302), respectively, and one end of each second solenoid valve connecting pipe (112) away from the first solenoid valve (301) or the second solenoid valve (302) connected thereto is oriented in a direction away from the side cover plate (11).

9. The air conditioner indoor unit according to claim 7, characterized in that: The side cover plate (11) is of a split type.

10. The air conditioner indoor unit according to any one of claims 1 to 3, characterized in that: The refrigerant pipeline (100) comprises a weld (101), and at least one of the first solenoid valve (301), the second solenoid valve (302) and the throttling device (400) is configured to be detachably connected to the remaining pipe sections of the refrigerant pipeline (100) through the weld (101) together with a portion of the pipe section of the refrigerant pipeline (100); The air conditioner indoor unit comprises a chassis (1), the indoor unit refrigerant flow path is located in the chassis (1), the chassis (1) comprises a chassis opening (1a) and a side cover plate (11), the side cover plate (11) is configured to open or close the chassis opening (1a), and the weld (101) is exposed at the chassis opening (1a).

11. A control method for an air-conditioning indoor unit according to any one of claims 1 to 10, characterized in that: include: Closing the first solenoid valve (301) and the second solenoid valve (302) and opening the throttling device (400) so that the air conditioner indoor unit is in the dehumidification mode; The first solenoid valve (301) and the second solenoid valve (302) are opened and the throttling device (400) is closed, so that the air conditioner indoor unit is in the non-dehumidification mode.

12. The control method according to claim 11, characterized in that: The non-dehumidification mode includes a cooling mode and a heating mode, and the control method further includes: In the refrigeration mode, liquid refrigerant is introduced from the liquid collecting port (100a); In the heating mode, gaseous refrigerant is introduced from the gas collecting port (100b).

Images