Air conditioner

Abstract

The utility model relates to the field of refrigeration technology discloses an air conditioner. The air conditioner comprises an indoor unit and at least two outdoor units. The at least two outdoor units are connected, and the indoor unit is connected with each outdoor unit; wherein, when defrosting, at least another outdoor unit supplies heat to the indoor unit. In the utility model, multiple outdoor units operate cooperatively, when one enters a defrosting state, other outdoor units are still in a heating mode, and heat can be continuously provided to the indoor unit, so that the heat loss caused by defrosting is compensated or even completely offset, the indoor temperature is kept stable, and the problem that the indoor temperature drops or fluctuates during the defrosting process of the existing air conditioner without electric auxiliary heating is solved.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and in particular to an air conditioner. Background Technology

[0002] With economic development, large commercial buildings and other architectural spaces are increasingly common, and their internal air conditioning systems generally employ large multi-split central air conditioning systems. Currently, multi-split air conditioning systems based on variable capacity regulation (VRF) technology sold on the market experience frost buildup on the outdoor unit's heat exchanger during prolonged heating operation in winter, leading to a decrease in heat exchange capacity. In this case, the system needs to enter defrost mode to restore performance. During defrost, the indoor unit stops heating, the outdoor unit's four-way valve switches to cooling mode, and the compressor absorbs some heat from the indoor side to defrost the outdoor heat exchanger. Once the defrost time is reached and the outdoor heat exchanger temperature returns to the preset value, the four-way valve switches back, and the unit resumes heating operation.

[0003] During the entire defrosting process, the unit not only stops supplying heat, but also needs to absorb heat from the indoor side, causing the indoor temperature to drop and fluctuate, which seriously affects the comfort of people.

[0004] To address this issue, some air conditioning manufacturers currently activate the electric auxiliary heating function of the indoor unit during defrosting and run the indoor fan at low speed. The electric auxiliary heating compensates for heat loss during defrosting, thus slowing the drop in indoor temperature. However, this practice not only contradicts the trend towards green, energy-saving, and efficient air conditioning systems, leading to wasted electricity, but it also only applies to indoor units equipped with electric auxiliary heating. For large VRF multi-split air conditioning systems, the indoor units are mostly pure heat pump types and typically do not have electric auxiliary heating, limiting the applicability of this solution and highlighting its limitations in practical applications.

[0005] Therefore, for air conditioners like VRF multi-split air conditioning systems that are not equipped with electric auxiliary heating, how to solve the problem of indoor temperature drop during defrosting is still an urgent issue for the industry. Utility Model Content

[0006] This utility model provides an air conditioner to solve the problem that the indoor temperature drops during the defrosting process in existing air conditioners that are not equipped with electric auxiliary heating.

[0007] This utility model provides an air conditioner, comprising: Indoor unit; At least two outdoor units are connected together, and the indoor unit is connected to each of the outdoor units; wherein, when one of the outdoor units is defrosting, at least another outdoor unit supplies heat to the indoor unit.

[0008] The air conditioner provided by this utility model includes a first outdoor unit and a second outdoor unit; the refrigerant discharged from the first compressor of the first outdoor unit flows through the indoor unit to the first outdoor heat exchanger of the first outdoor unit; the refrigerant discharged from the second compressor of the second outdoor unit flows through the second outdoor heat exchanger of the second outdoor unit to the first outdoor heat exchanger; the refrigerant discharged from the first outdoor heat exchanger is divided into two paths, one of which flows back to the first compressor; the other of which flows back to the second compressor.

[0009] The air conditioner provided by this utility model also includes: The defrosting adjustment component has a conducting state and a cut-off state; in the conducting state, the suction port of the first compressor is connected to the suction port of the second compressor; in the cut-off state, the suction port of the first compressor is disconnected from the suction port of the second compressor.

[0010] According to the air conditioner provided by this utility model, the defrosting adjustment component includes: The defrosting pipeline connects the suction port of the first compressor to the suction port of the second compressor. A defrost control valve is installed in the defrost pipeline; the defrost control valve has an on state and an off state.

[0011] According to the air conditioner provided by this utility model, the defrosting adjustment component includes: A three-way control valve, wherein the inlet of the three-way control valve is connected to the first outdoor heat exchanger, the first outlet of the three-way control valve is connected to the suction port of the first compressor, and the second outlet of the three-way control valve is connected to the suction port of the second compressor.

[0012] According to the air conditioner provided by this utility model, the first outdoor unit further includes a first four-way valve; the d-pipe of the first four-way valve is connected to the exhaust port of the first compressor, the e-pipe of the first four-way valve is connected to the first outdoor heat exchanger, the c-pipe of the first four-way valve is connected to the indoor unit, the s-pipe of the first four-way valve is connected to the suction port of the first compressor, and the s-pipe of the first four-way valve is also connected to the suction port of the second compressor through the defrosting adjustment component.

[0013] According to the air conditioner provided by this utility model, the first outdoor unit further includes: The first control valve is located between the c-pipe of the first four-way valve and the indoor unit.

[0014] According to the air conditioner provided by this utility model, the first outdoor unit further includes: The first one-way valve is located between the first compressor and the d-tube of the first four-way valve.

[0015] According to the air conditioner provided by this utility model, the first outdoor unit further includes: The first gas-liquid separator is located at the suction port of the first compressor.

[0016] The air conditioner provided according to this utility model includes at least two indoor units.

[0017] The air conditioner provided by this utility model employs multiple outdoor units operating in coordination. When one unit enters defrost mode, the others remain in heating mode, continuing to provide heat to the room. This compensates for or even completely negates the heat loss caused by defrosting, maintaining a stable indoor temperature. This utility model achieves uninterrupted heating through alternating defrosting of multiple outdoor units, eliminating the need for electric auxiliary heating devices. This avoids energy waste caused by directly converting electrical energy into heat and is also applicable to pure heat pump indoor units without electric auxiliary heating (common in large VRF systems), expanding the applicability of the solution. By setting up multiple outdoor units, this utility model solves the problem of indoor temperature drop or fluctuation during defrosting in existing air conditioners without electric auxiliary heating. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is one of the structural schematic diagrams of the air conditioner provided by this utility model.

[0020] Figure 2 This is the second structural schematic diagram of the air conditioner provided by this utility model.

[0021] Figure 3 This is a schematic diagram of the air conditioner provided by this utility model in cooling mode. The arrows in the diagram represent the flow direction of the refrigerant.

[0022] Figure 4 This is a schematic diagram of the air conditioner provided by this utility model in heating mode. The arrows in the diagram represent the flow direction of the refrigerant.

[0023] Figure 5 This is a schematic diagram of the air conditioner provided by this utility model in defrost mode. The arrows in the diagram represent the flow direction of the refrigerant.

[0024] Figure label: 100. Indoor unit; 110. Indoor heat exchanger; 120. Indoor electronic expansion valve; 200, First outdoor unit; 210, First compressor; 220, First outdoor heat exchanger; 230, First four-way valve; 240, First control valve; 250, First check valve; 260, First gas-liquid separator; 270, First electronic expansion valve; 280, First fan; 300, Second outdoor unit; 310, Second compressor; 320, Second outdoor heat exchanger; 330, Second four-way valve; 340, Second control valve; 350, Second check valve; 360, Second gas-liquid separator; 370, Second electronic expansion valve; 380, Second fan; 400. Defrosting adjustment component; 410. Defrosting pipeline; 420. Defrosting control valve; 430. Three-way control valve. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this specification, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing this specification. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this specification. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this specification, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0028] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this specification. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] In the embodiments of this specification, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0031] The following is combined Figures 1 to 5 The air conditioner of this utility model will be described.

[0032] A specific embodiment of the first aspect of this utility model provides an air conditioner. The air conditioner includes an indoor unit 100 and at least two outdoor units. The at least two outdoor units are connected, and the indoor unit 100 is connected to each outdoor unit; wherein, when one outdoor unit is defrosting, at least another outdoor unit supplies heat to the indoor unit 100.

[0033] In traditional single-outdoor-unit systems, defrosting requires the system to switch entirely to cooling mode and absorb heat from the indoor environment, inevitably causing a drop in room temperature. This embodiment, however, uses multiple outdoor units operating collaboratively. When one unit enters defrosting mode, the others remain in heating mode, continuing to provide heat to the room. This compensates for or even completely negates the heat loss caused by defrosting, maintaining a stable indoor temperature. This embodiment achieves uninterrupted heating through alternating defrosting by multiple outdoor units, eliminating the need for electric auxiliary heating devices. This avoids energy waste from directly converting electricity into heat and is also applicable to pure heat pump indoor units 100 without electric auxiliary heating (common in large VRF systems), expanding the solution's applicability. In this embodiment, by using multiple outdoor units, the problem of indoor temperature drop or fluctuation during defrosting in existing air conditioners without electric auxiliary heating can be solved.

[0034] Optionally, the air conditioner may include two outdoor units, three outdoor units, or four outdoor units.

[0035] In some embodiments of this utility model, the air conditioner includes a first outdoor unit 200 and a second outdoor unit 300. In other words, the air conditioner includes two outdoor units, which are referred to as the first outdoor unit 200 and the second outdoor unit 300 for ease of description. In defrost mode, the refrigerant discharged from the first compressor 210 of the first outdoor unit 200 flows through the indoor unit 100 to the first outdoor heat exchanger 220 of the first outdoor unit 200; the refrigerant discharged from the second compressor 310 of the second outdoor unit 300 flows through the second outdoor heat exchanger 320 of the second outdoor unit 300 to the first outdoor heat exchanger 220; the refrigerant discharged from the first outdoor heat exchanger 220 is divided into two paths, one of which flows back to the first compressor 210; the other of which flows back to the second compressor 310.

[0036] In this embodiment, during the defrosting process of the second outdoor unit 300, the first outdoor unit 200 continuously supplies heat to the room, ensuring continuous indoor heating and avoiding the room temperature drop problem caused by defrosting in traditional systems. The refrigerant discharged from the first outdoor heat exchanger 220 is divided into two paths: one returns to the first compressor 210; the other returns to the second compressor 310. This refrigerant split-path return design can reasonably allocate the return gas volume and load of the two compressors, avoiding excessive return flow or liquid slugging risk in a single unit, which is beneficial to the stable operation of the system under complex operating conditions. By setting two outdoor units, continuous indoor heating can be ensured without excessively increasing the cost of the air conditioner.

[0037] Optionally, after the second outdoor unit 300 finishes defrosting, the refrigerant discharged from the second compressor 310 of the second outdoor unit 300 can be reversed to flow through the indoor unit 100 to the second outdoor heat exchanger 320 of the second outdoor unit 300; the refrigerant discharged from the first compressor 210 of the first outdoor unit 200 can flow through the first outdoor heat exchanger 220 of the first outdoor unit 200 to the second outdoor heat exchanger 320; the refrigerant discharged from the second outdoor heat exchanger 320 is divided into two paths, one returning to the first compressor 210; the other returning to the second compressor 310. This achieves defrosting of the first outdoor heat exchanger 220 and continuous heating of the indoor units.

[0038] It should be noted that the structure of the first outdoor unit 200 and the first indoor unit 100 can be the same.

[0039] In some embodiments of this utility model, the air conditioner includes a defrost regulating member 400; it has a conducting state and a cut-off state; in the conducting state, the suction port of the first compressor 210 is connected to the suction port of the second compressor 310; in the cut-off state, the suction port of the first compressor 210 is disconnected from the suction port of the second compressor 310.

[0040] In this embodiment, in the on state, the suction port of the first compressor 210 is connected to the suction port of the second compressor 310. At this time, the refrigerant discharged from the first outdoor heat exchanger 220 can flow back not only to the first compressor 210 but also to the second compressor 310. In the off state, the suction ports of the first compressor 210 and the second compressor 310 are disconnected. At this time, the refrigerant discharged from the first outdoor heat exchanger 220 can only flow back to the first compressor 210 and cannot flow back to the second compressor 310. In other words, in defrost mode, the defrost regulating element 400 is in the on state. In non-defrost mode, such as in cooling or heating mode, the defrost regulating element 400 is in the off state.

[0041] like Figure 1 As shown, optionally, the defrosting regulating component 400 includes a defrosting pipeline 410 and a defrosting control valve 420. The suction port of the first compressor 210 is connected to the suction port of the second compressor 310 through the defrosting pipeline 410. The defrosting control valve 420 is disposed in the defrosting pipeline 410; the defrosting control valve 420 has an on state and an off state.

[0042] In this embodiment, the defrost control valve 420 is in the open state in defrost mode. In non-defrost mode, the defrost control valve 420 is in the closed state. In defrost mode, the refrigerant discharged from the first outdoor heat exchanger 220 is divided into two paths: one path flows back to the first compressor 210, and the other path flows back to the second compressor 310 through the defrost control valve 420.

[0043] like Figure 2 As shown, optionally, the defrosting regulator 400 includes a three-way control valve 430. The inlet of the three-way control valve 430 is connected to the first outdoor heat exchanger 220, the first outlet of the three-way control valve 430 is connected to the suction port of the first compressor 210, and the second outlet of the three-way control valve 430 is connected to the suction port of the second compressor 310.

[0044] In this embodiment, in defrost mode, both the first and second outlets of the three-way control valve 430 are open; in non-defrost mode, the first outlet of the three-way control valve 430 is open and the second outlet is closed.

[0045] like Figure 1 As shown, in some embodiments of this utility model, the first outdoor unit 200 further includes a first four-way valve 230; the d-pipe of the first four-way valve 230 is connected to the exhaust port of the first compressor 210, the e-pipe of the first four-way valve 230 is connected to the first outdoor heat exchanger 220, the c-pipe of the first four-way valve 230 is connected to the indoor unit 100, the s-pipe of the first four-way valve 230 is connected to the suction port of the first compressor 210, and the s-pipe of the first four-way valve 230 is also connected to the suction port of the second compressor 310 through a defrost regulating component 400.

[0046] The second outdoor unit 300 includes a second four-way valve 330; the d-pipe of the second four-way valve 330 is connected to the exhaust port of the second compressor 310, the e-pipe of the second four-way valve 330 is connected to the second outdoor heat exchanger 320, the c-pipe of the second four-way valve 330 is connected to the indoor unit 100, the s-pipe of the second four-way valve 330 is connected to the suction port of the second compressor 310, and the s-pipe of the second four-way valve 330 is also connected to the suction port of the first compressor 210 through a defrost regulating element 400.

[0047] When defrosting the second outdoor heat exchanger 320 of the second outdoor unit 300, the refrigerant discharged from the first compressor 210 of the first outdoor unit 200 passes sequentially through the d and c pipes of the first four-way valve 230, the indoor unit 100, and the first outdoor heat exchanger 220. Simultaneously, the refrigerant discharged from the second compressor 310 of the second outdoor unit 300 passes sequentially through the d and e pipes of the second four-way valve 330, the second outdoor heat exchanger 320, and the first outdoor heat exchanger 220. The refrigerant discharged from the first outdoor heat exchanger 220 passes sequentially through the e and S pipes of the first four-way valve 230 and is then divided into two paths. One path returns to the first compressor 210, and the other path returns to the second compressor 310 through the defrost regulating element 400. This ensures that the second outdoor unit 300 has sufficient refrigerant flow for efficient defrosting while preventing the first compressor 210 from frequently starting and stopping or experiencing load fluctuations due to insufficient suction, achieving seamless defrosting and continuous heating.

[0048] In addition, by connecting the suction ports of the two compressors through the defrosting regulator 400, the two compressors can share suction pressure and liquid return resources when needed (such as during defrosting). This effectively prevents the risk of liquid slugging caused by a sudden increase in liquid return to a single compressor, protects compressor safety, and extends system life.

[0049] This design, through the switching of the four-way valve and the cooperation of the defrost regulator 400, fully utilizes the system's own heat pump cycle to solve the comfort problem during defrosting, eliminating the need for any electric auxiliary heating devices. This not only eliminates high-energy-consuming auxiliary heating, making the system more compliant with green energy-saving standards, but also makes this solution applicable to all pure heat pump multi-split systems, demonstrating its high versatility.

[0050] In some embodiments of this utility model, the first outdoor unit 200 further includes a first control valve 240; the first control valve 240 is disposed between the c-pipe of the first four-way valve 230 and the indoor unit 100. The second outdoor unit 300 further includes a second control valve 340; the second control valve 340 is disposed between the c-pipe of the second four-way valve 330 and the indoor unit 100. Both the first control valve 240 and the second control valve 340 have an open state and a closed state. In cooling mode and heating mode, both the first control valve 240 and the second control valve 340 are in the open state, and the defrost regulating element 400 is in the closed state. When defrosting the second outdoor unit 300, the second control valve 340 is in the closed state, the first control valve 240 is in the open state, and the defrost regulating element 400 is in the conductive state. When defrosting the first outdoor unit 200, the first control valve 240 is in the closed state, the second control valve 340 is in the open state, and the defrost regulating element 400 is in the conductive state. By setting the first control valve 240 and the second control valve 340, the low-temperature refrigerant from the outdoor unit in the refrigeration cycle can be completely prevented from flowing to the indoor unit 100, thus ensuring the indoor heating effect.

[0051] In some embodiments of this utility model, the first outdoor unit 200 further includes a first one-way valve 250; the first one-way valve 250 is disposed between the first compressor 210 and the d-tube of the first four-way valve 230. The second outdoor unit 300 further includes a second one-way valve 350; the second one-way valve 350 is disposed between the second compressor 310 and the d-tube of the second four-way valve 330. By providing one-way valves at the discharge ports of the two compressors, refrigerant backflow can be prevented, improving the operational safety of the compressors.

[0052] In some embodiments of this utility model, the first outdoor unit 200 further includes a first gas-liquid separator 260; the first gas-liquid separator 260 is disposed at the air intake of the first compressor 210. The second outdoor unit 300 further includes a second gas-liquid separator 360; the second gas-liquid separator 360 is disposed at the air intake of the second compressor 310. By providing gas-liquid separators at the air intakes of the two compressors, liquid slugging can be avoided.

[0053] In some embodiments of this utility model, the first outdoor unit 200 further includes a first electronic expansion valve 270; the first electronic expansion valve 270 is disposed at one end of the first outdoor heat exchanger 220. The second outdoor unit 300 further includes a second electronic expansion valve 370; the second electronic expansion valve 370 is disposed at one end of the second outdoor heat exchanger 320. The two electronic expansion valves (i.e., the first electronic expansion valve 270 and the second electronic expansion valve 370) can throttle the flow of refrigerant.

[0054] In some embodiments of this utility model, the first outdoor unit 200 further includes a first fan 280; the first fan 280 is disposed on one side of the first outdoor heat exchanger 220. The second outdoor unit 300 further includes a second fan 380; the second fan 380 is disposed on one side of the second outdoor heat exchanger 320.

[0055] In some embodiments of this utility model, the air conditioner includes multiple indoor units 100. This expands the applicable scenarios for the air conditioner.

[0056] Optionally, multiple indoor units 100 can be arranged in parallel.

[0057] Optionally, the indoor unit 100 includes an indoor heat exchanger 110 and an indoor electronic expansion valve 120; the indoor heat exchanger 110 is provided with an indoor electronic expansion valve 120 at one end.

[0058] like Figure 3 As shown, in cooling mode, the defrost regulator 400 is in the off state; the refrigerant discharged from the first compressor 210 of the first outdoor unit 200 flows sequentially through the first one-way valve 250, the d and e pipes of the first four-way valve 230, the first outdoor heat exchanger 220, the first electronic expansion valve 270, the indoor electronic expansion valve 120, the indoor heat exchanger 110, the first control valve 240, the c and S pipes of the first four-way valve 230, and the first gas-liquid separator 260 before returning to the first compressor 210. The refrigerant discharged from the second compressor 310 of the second outdoor unit 300 flows sequentially through the second one-way valve 350, the d and e pipes of the second four-way valve 330, the second outdoor heat exchanger 320, the second electronic expansion valve 370, the indoor electronic expansion valve 120, the indoor heat exchanger 110, the second control valve 340, the c and S pipes of the second four-way valve 330, and the second gas-liquid separator 360 before returning to the second compressor 310.

[0059] like Figure 4As shown, in heating mode, the defrost regulator 400 is in the off state; the refrigerant discharged from the first compressor 210 of the first outdoor unit 200 flows back to the first compressor 210 after passing through the first one-way valve 250, the d and c pipes of the first four-way valve 230, the first control valve 240, the indoor heat exchanger 110, the indoor electronic expansion valve 120, the first electronic expansion valve 270, the first outdoor heat exchanger 220, the e and S pipes of the first four-way valve 230, and the first gas-liquid separator 260. The refrigerant discharged from the second compressor 310 of the second outdoor unit 300 flows back to the second compressor 310 after passing through the second one-way valve 350, the d and c pipes of the second four-way valve 330, the second control valve 340, the indoor heat exchanger 110, the indoor electronic expansion valve 120, the second electronic expansion valve 370, the second outdoor heat exchanger 320, the e and S pipes of the second four-way valve 330, and the second gas-liquid separator 360.

[0060] like Figure 5 As shown, in dehumidification mode, the defrost regulating component 400 is in the conductive state; the refrigerant discharged from the first compressor 210 of the first outdoor unit 200 passes sequentially through the first one-way valve 250, the d and c pipes of the first four-way valve 230, the first control valve 240, the indoor heat exchanger 110, the indoor electronic expansion valve 120, the first electronic expansion valve 270, the first outdoor heat exchanger 220, and the e and S pipes of the first four-way valve 230. The refrigerant discharged from the second compressor 310 of the second outdoor unit 300 passes sequentially through the second one-way valve 350, the d and e pipes of the second four-way valve 330, the second outdoor heat exchanger 320, the second electronic expansion valve 370, the first electronic expansion valve 270, the first outdoor heat exchanger 220, and the e and S pipes of the first four-way valve 230. The refrigerant discharged from the S-tube of the first four-way valve 230 is divided into two paths. One path flows back to the first compressor 210 through the first gas-liquid separator 260; the other path flows back to the second compressor 310 through the defrost regulating element 400 and the second gas-liquid separator 360 in sequence.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An air conditioner, characterized in that, include: Indoor unit (100); At least two outdoor units are connected together, and the indoor unit (100) is connected to each of the outdoor units; wherein, when one of the outdoor units is defrosting, at least another outdoor unit supplies heat to the indoor unit (100).

2. The air conditioner according to claim 1, characterized in that, It includes a first outdoor unit (200) and a second outdoor unit (300); the refrigerant discharged by the first compressor (210) of the first outdoor unit (200) flows through the indoor unit (100) to the first outdoor heat exchanger (220) of the first outdoor unit (200); the refrigerant discharged by the second compressor (310) of the second outdoor unit (300) flows through the second outdoor heat exchanger (320) of the second outdoor unit (300) to the first outdoor heat exchanger (220); the refrigerant discharged from the first outdoor heat exchanger (220) is divided into two paths, one of which flows back to the first compressor (210); the other of which flows back to the second compressor (310).

3. The air conditioner according to claim 2, characterized in that, Also includes: The defrosting adjustment element (400) has an on state and an off state; In the on state, the suction port of the first compressor (210) is connected to the suction port of the second compressor (310); in the off state, the suction port of the first compressor (210) is disconnected from the suction port of the second compressor (310).

4. The air conditioner according to claim 3, characterized in that, The defrosting adjustment element (400) includes: The defrosting line (410) connects the suction port of the first compressor (210) to the suction port of the second compressor (310) through the defrosting line (410); A defrost control valve (420) is provided in the defrost pipeline (410); the defrost control valve (420) has an on state and a off state.

5. The air conditioner according to claim 3, characterized in that, The defrosting adjustment element (400) includes: A three-way control valve (430) is connected at its inlet to the first outdoor heat exchanger (220), at its first outlet to the suction port of the first compressor (210), and at its second outlet to the suction port of the second compressor (310).

6. The air conditioner according to claim 3, characterized in that, The first outdoor unit (200) also includes: The first four-way valve (230) has its d-pipe connected to the exhaust port of the first compressor (210), its e-pipe connected to the first outdoor heat exchanger (220), its c-pipe connected to the indoor unit (100), its s-pipe connected to the suction port of the first compressor (210), and its s-pipe also connected to the suction port of the second compressor (310) via the defrost regulating element (400).

7. The air conditioner according to claim 6, characterized in that, The first outdoor unit (200) also includes: The first control valve (240) is located between the c-pipe of the first four-way valve (230) and the indoor unit (100).

8. The air conditioner according to claim 6, characterized in that, The first outdoor unit (200) also includes: The first one-way valve (250) is disposed between the first compressor (210) and the d-tube of the first four-way valve (230).

9. The air conditioner according to claim 6, characterized in that, The first outdoor unit (200) also includes: The first gas-liquid separator (260) is located at the suction port of the first compressor (210).

10. The air conditioner according to any one of claims 1 to 9, characterized in that, Includes at least two of the indoor units (100).

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