Air conditioning system and air conditioner

Abstract

The utility model relates to the technical field of air conditioners and discloses an air conditioning system and an air conditioner. The air conditioning system comprises a compressor, a first reversing valve, an outdoor heat exchanger, a first indoor heat exchanger and a second indoor heat exchanger, a fourth connecting port of the first reversing valve is connected with the first indoor heat exchanger through a first pipeline and connected with the second indoor heat exchanger through a second pipeline, and the first indoor heat exchanger is arranged on the first pipeline. The second indoor heat exchanger is arranged on a second pipeline, the first pipeline comprises a first sub-pipeline, and the second pipeline comprises a second sub-pipeline; the first branch is connected between a third interface of the second reversing valve and the first indoor heat exchanger; the second branch is connected between the third interface and the second indoor heat exchanger; the first switch assembly is used for controlling one of the first sub-pipeline and the first branch to be conducted; and the second switch assembly is used for controlling one of the second sub-pipeline and the second branch to be conducted, so that the refrigerating and heating efficiency of the air conditioner is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air conditioning system and an air conditioner. Background Art

[0002] At present, the operating modes of air conditioners generally include cooling mode, heating mode, dehumidification mode, etc. However, as people's living standards improve, users have more and more functional requirements for air conditioners. For example, in a one-to-many air conditioner (one outdoor unit with multiple indoor units), one room is required to run cooling and another room to run heating.

[0003] In the related art, the air conditioning system includes multiple heat exchange units, each heat exchange unit includes two indoor heat exchangers, one heat exchange unit is located in one room, and different heat exchange units are located in different rooms. One of the same heat exchange units is connected to a three-way valve, and the other is connected to a four-way valve. The three-way valve and the four-way valve control the flow direction of the refrigerant in the indoor heat exchanger connected thereto to achieve different functions.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The indoor heat exchangers connected to the three-way valve in different heat exchange units need to perform the same function, such as cooling, and the indoor heat exchangers connected to the four-way valve need to perform the same function, such as heating. Therefore, when one room needs cooling and the other room needs heating, the refrigerant can only flow through the indoor heat exchanger connected to the three-way valve in the cooling room, and the refrigerant cannot flow through the indoor heat exchanger connected to the four-way valve. In the room that needs heating, the refrigerant can only flow through the indoor heat exchanger connected to the four-way valve, and the refrigerant cannot flow through the indoor heat exchanger connected to the three-way valve. This results in the indoor heat exchanger not being fully utilized, and the efficiency of cooling and heating is reduced.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide an air conditioning system and an air conditioner to solve the problem of reduced cooling and heating efficiency when cooling and heating are running simultaneously.

[0009] According to a first aspect of an embodiment of the utility model, an air-conditioning system is provided, comprising: a compressor, a first reversing valve, an outdoor heat exchanger, and an indoor heat exchanger, wherein the indoor heat exchanger comprises a first indoor heat exchanger and a second indoor heat exchanger, wherein the first reversing valve comprises first to fourth connecting ports, the first connecting port is connected to the exhaust port of the compressor, the second connecting port is connected to the outdoor heat exchanger, the third connecting port is connected to the return air port of the compressor, the fourth connecting port is connected to the first indoor heat exchanger through a first pipeline and is connected to the second indoor heat exchanger through a second pipeline, the first pipeline and the second pipeline are connected in parallel, the first indoor heat exchanger is arranged in the first pipeline, the second indoor heat exchanger is arranged in the second pipeline, the first pipeline comprises a first sub-pipeline, the first The sub-pipeline is connected between the first indoor heat exchanger and the fourth connection port, the second pipeline includes a second sub-pipeline, and the second sub-pipeline is connected between the second indoor heat exchanger and the fourth connection port; the second reversing valve includes first to third interfaces, the first interface is connected to the exhaust port of the compressor, and the second interface is connected to the return air port of the compressor; the first branch is connected between the third interface and the first indoor heat exchanger, and the second branch is connected between the third interface and the second indoor heat exchanger; the first switch component is arranged in the first sub-pipeline and / or the first branch, and is used to control the conduction between the first sub-pipeline and one of the first branches; the second switch component is arranged in the second sub-pipeline and / or the second branch, and is used to control the conduction between the second sub-pipeline and one of the second branch.

[0010] Optionally, the first switch assembly includes: a first switch, arranged in the first sub-pipeline, for controlling the on-off of the first sub-pipeline; and a second switch, arranged in the first branch, for controlling the on-off of the first branch.

[0011] Optionally, the first switch and / or the second switch is a solenoid valve, and is configured so that one of the first switch and the second switch is selectively opened.

[0012] Optionally, the second switch assembly includes: a third switch, arranged in the second sub-pipeline, for controlling the on-off of the second sub-pipeline; and a fourth switch, arranged in the second branch, for controlling the on-off of the second branch.

[0013] Optionally, the third switch and / or the fourth switch is a solenoid valve, and is configured so that one of the third switch and the fourth switch is selectively opened.

[0014] Optionally, the first pipeline also includes: a first conducting pipe, one end of which is connected to both the first sub-pipeline and the second sub-pipeline, and the other end is connected to the fourth connecting port; the air-conditioning system also includes: a first control switch, which is arranged on the first conducting pipe and is used to control the on-off of the first conducting pipe; a second conducting pipe, one end of which is connected to both the first branch and the second branch, and the other end is connected to the third interface; a second control switch, which is arranged on the second conducting pipe and is used to control the on-off of the second conducting pipe.

[0015] Optionally, the air-conditioning system also includes: a first throttle valve, arranged in the first pipeline, and the first throttle valve, the first indoor heat exchanger and the first switch assembly are arranged in sequence; a second throttle valve, arranged in the second pipeline, and the second throttle valve, the second indoor heat exchanger and the second switch assembly are arranged in sequence.

[0016] Optionally, the compressor includes: a medium-pressure cylinder and a low-pressure cylinder; wherein, the first connecting port is connected to the exhaust ports of the medium-pressure cylinder and the low-pressure cylinder, the third connecting port is connected to the return air port of the medium-pressure cylinder, the first interface is connected to the exhaust ports of the medium-pressure cylinder and the low-pressure cylinder, and the second interface is connected to the return air port of the low-pressure cylinder.

[0017] Optionally, there are multiple indoor heat exchangers, and the multiple indoor heat exchangers are connected in parallel.

[0018] According to a second aspect of the embodiments of the utility model, an air conditioner is provided, comprising an air conditioning system as described in any one of the above embodiments.

[0019] The air conditioning system and air conditioning provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] The first sub-pipeline, the second sub-pipeline, the first branch and the second branch are arranged so that the first indoor heat exchanger and the second indoor heat exchanger are connected to both the fourth connection port of the first reversing valve and the third interface of the second reversing valve. The first switch assembly and the second switch assembly are arranged to respectively control the conduction between the first sub-pipeline and the first branch and the conduction between the second sub-pipeline and the second branch. In this way, the first indoor heat exchanger can be selectively connected to the fourth connection port or the third interface according to the requirements of cooling, heating, etc., and the second indoor heat exchanger can be connected to the fourth connection port or the third interface, so that the first indoor heat exchanger and the second indoor heat exchanger can both participate in the refrigerant circulation, thereby improving the efficiency of air conditioning cooling and heating.

[0021] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a structural schematic diagram of an air-conditioning system provided in Embodiment 1 of the present disclosure, wherein the air-conditioning system operates in full cooling mode, and the direction of the arrow indicates the flow direction of the refrigerant;

[0024] Figure 2is a structural schematic diagram of an air conditioning system provided in the first embodiment of the present disclosure, wherein the air conditioning system operates in a full heating mode, and the direction of the arrow indicates the flow direction of the refrigerant;

[0025] Figure 3 is a structural schematic diagram of an air conditioning system provided in the first embodiment of the present disclosure, wherein the air conditioning system operates in both cooling and heating modes, and the direction of the arrow indicates the flow direction of the refrigerant;

[0026] Figure 4 is a structural schematic diagram of an air-conditioning system provided in Embodiment 2 of the present disclosure, wherein the air-conditioning system operates in full cooling mode, and the direction of the arrow indicates the flow direction of the refrigerant;

[0027] Figure 5 is a structural schematic diagram of an air conditioning system provided in Embodiment 2 of the present disclosure, wherein the air conditioning system operates in full heating mode, and the direction of the arrow indicates the flow direction of the refrigerant;

[0028] Figure 6 It is a structural schematic diagram of an air-conditioning system provided in Embodiment 2 of the present disclosure, wherein the air-conditioning system operates in both cooling and heating modes, and the direction of the arrow indicates the flow direction of the refrigerant.

[0029] Reference numerals:

[0030] 10. compressor; 101. first compression cylinder; 102. second compression cylinder; 20. first reversing valve; 201. first connection port; 202. second connection port; 203. third connection port; 204. fourth connection port; 30. second reversing valve; 301. first interface; 302. second interface; 303. third interface; 40. outdoor heat exchanger; 401. first liquid inlet and outlet; 402. second liquid inlet and outlet; 50. subcooler; 501. air supply branch; 502. liquid storage tank; 60. indoor heat exchanger; 601. first indoor heat exchanger; 602. second indoor heat exchanger; 701. first switch; 702. The second switch; 703, the third switch; 704, the fourth switch; 705, the first throttle valve; 706, the second throttle valve; 707, the first control switch; 708, the second control switch; 709, the first pipeline; 7091, the first sub-pipeline; 7092, the first conducting pipe; 710, the second pipeline; 7101, the second sub-pipeline; 7102, the second conducting pipe; 711, the first branch; 712, the second branch; 801, the first connecting pipe; 802, the valve; 803, the second connecting pipe; 804, the one-way valve; 805, the first gas-liquid separator; 806, the second gas-liquid separator; 807, the first return air pipe. DETAILED DESCRIPTION

[0031] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0032] The terms "first", "second", etc. in the specification and claims of the disclosed embodiments and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate for the disclosed embodiments described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0034] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0035] Unless otherwise stated, the term "plurality" means two or more.

[0036] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B indicates: A or B.

[0037] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A, or B, or, A and B.

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0039] Combination Figure 1-6 As shown, an embodiment of the present disclosure provides an air conditioning system, including a compressor 10, a reversing valve assembly, an outdoor heat exchanger 40, and an indoor heat exchanger 60 connected in sequence.

[0040] The compressor 10 includes a first compression cylinder 101 and a second compression cylinder 102, and the indoor heat exchanger includes a first indoor heat exchanger 601 and a second indoor heat exchanger 602 connected in parallel. The indoor heat exchanger is connected to the return air port of the first compression cylinder 101 through a first return air pipe 807, and is connected to the return air port of the second compression cylinder 102 through a second return air pipe 808;

[0041] The air conditioning system further includes a connecting pipe and a control valve. The connecting pipe is connected between the first return air pipe 807 and the second return air pipe 808; the control valve is arranged on the connecting pipe to control the opening and closing of the connecting pipe.

[0042] Embodiment 1:

[0043] like Figures 1 to 3 As shown, the first compression cylinder 101 is a medium-pressure cylinder, the second compression cylinder 102 is a low-pressure cylinder, and the indoor heat exchanger includes a first indoor heat exchanger 601 and a second indoor heat exchanger 602 in parallel. The indoor heat exchanger is connected to the return air port of the medium-pressure cylinder through a first return air pipe 807 to return the refrigerant to the medium-pressure cylinder, and the indoor heat exchanger is connected to the return air port of the low-pressure cylinder through a second return air pipe 808 to return the refrigerant to the low-pressure cylinder.

[0044] The air conditioning system further includes a connecting pipe and a control valve. The connecting pipe is connected between the first return air pipe 807 and the second return air pipe 808; the control valve is arranged on the connecting pipe to control the opening and closing of the connecting pipe.

[0045] When there is no refrigerant in the first return air pipe 807 or not enough refrigerant flows to the return air port of the medium pressure cylinder, the control valve is opened, and the refrigerant in the second return air pipe 808 flows to the first return air pipe 807 through the connecting pipe, and this part of the refrigerant can be compressed in the medium pressure cylinder. In this way, the volume of the medium pressure cylinder is effectively utilized.

[0046] When there is no refrigerant in the second return air pipe 808 or not enough refrigerant flows to the return air port of the low-pressure cylinder, the control valve is opened, and the refrigerant in the first return air pipe 807 flows to the second return air pipe 808 through the connecting pipe, and this part of the refrigerant can be compressed in the low-pressure cylinder. In this way, the volume of the low-pressure cylinder is effectively utilized.

[0047] Optionally, the reversing valve assembly includes a first reversing valve 20 and a second reversing valve 30 .

[0048] The first reversing valve 20 includes first to fourth connection ports 204, the first connection port 201 is connected to the exhaust port of the compressor 10, the second connection port 202 is connected to the outdoor heat exchanger 40, the third connection port 203 is connected to the return air port of the medium pressure cylinder through the first return air pipe 807, and the fourth connection port 204 is connected to the first indoor heat exchanger 601 and / or to the second indoor heat exchanger 602.

[0049] The second reversing valve 30 includes first to third interfaces 303, the first interface 301 is connected to the exhaust ports of the medium-pressure cylinder and the low-pressure cylinder, the second interface 302 is connected to the return port of the low-pressure cylinder through the second return air pipe 808, and the third interface 303 is connected to the first indoor heat exchanger 601 and / or to the second indoor heat exchanger 602.

[0050] The compressor 10 includes a housing, and the intermediate pressure cylinder and the low pressure cylinder are both located in the housing. The exhaust port of the intermediate pressure cylinder and the exhaust port of the low pressure cylinder are both connected to the exhaust chamber, and the exhaust chamber is connected to one end of the exhaust pipe. The other end of the exhaust pipe is connected to the first interface 301 and the first connection port 201 at the same time.

[0051] One end of the connecting pipe is connected between the second interface 302 and the return air port of the low-pressure cylinder, and the other end of the connecting pipe is connected between the third connection port 203 and the return air port of the medium-pressure cylinder. In this way, the connecting pipe is arranged in the outdoor unit, and the control valve is also located in the outdoor unit, which is convenient for installation and maintenance of the connecting pipe and the control valve. The air conditioner includes an indoor unit and an outdoor unit, the indoor heat exchanger is located in the indoor unit, and the compressor 10 and the outdoor heat exchanger 40 are located in the outdoor unit.

[0052] The first reversing valve 20 is a four-way valve, and the second connection port 202 is connected to the outdoor heat exchanger 40. In this way, when the air conditioner is running for heating, the refrigerant first flows through the indoor heat exchanger and then flows through the outdoor heat exchanger 40. The refrigerant flowing out of the outdoor heat exchanger 40 flows back to the medium-pressure cylinder through the second connection port 202, the third connection port 203, and the first return air pipe 807. When the air conditioner is cooling, the refrigerant flowing out of the indoor heat exchanger flows back to the medium-pressure cylinder through the fourth connection port 204, the third connection port 203, and the first return air pipe 807.

[0053] The second reversing valve 30 is a three-way valve, and the three-way valve has no interface to connect with the outdoor heat exchanger 40. Therefore, when the air conditioner is running for heating, the refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger 40 will not pass through the second reversing valve 30 when flowing out of the outdoor heat exchanger 40, but will flow back to the medium-pressure cylinder through the second connection port 202, the third connection port 203, and the first return air pipe 807. In other words, at this time, there is no return air port for the refrigerant to flow to the low-pressure cylinder in the second return air pipe 808.

[0054] The second reversing valve 30 may also be a four-way valve. When in use, one interface of the four-way valve is blocked, and the remaining three interfaces are the first to third interfaces 303 .

[0055] Optionally, the connecting pipe includes a first connecting pipe 801, one end of the first connecting pipe 801 is connected between the second interface 302 and the air return port of the second compression cylinder 102, and the other end of the first connecting pipe 801 is connected between the third connecting port 203 and the air return port of the first compression cylinder 101, and the control valve includes a valve 802, and the valve 802 is provided on the first connecting pipe 801;

[0056] The air conditioning system further includes a controller, which is connected to the valve 802 and is configured to:

[0057] When the refrigerant flows through the indoor heat exchanger via the third interface 303, the refrigerant flows to the outdoor heat exchanger 40 via the indoor heat exchanger. At this time, no refrigerant will flow back to the return air port of the low-pressure cylinder via the second interface 302. At this time, the valve 802 is opened, the first connecting pipe 801 is connected, part of the refrigerant in the first return air pipe 807 flows back to the return air port of the medium-pressure cylinder, and the other part of the refrigerant flows into the second return air pipe 808 via the first connecting pipe 801, and flows into the return air port of the low-pressure cylinder; when the refrigerant flows to the third interface 303 via the indoor heat exchanger, the refrigerant flowing to the third interface 303 flows into the return air pipe of the low-pressure cylinder via the second interface 302 and the second return air pipe 808 in turn, and there is refrigerant in the return air pipe of the low-pressure cylinder flowing back to the return air port of the low-pressure cylinder. At this time, there is no need for refrigerant to flow from the return air port of the medium-pressure cylinder into the return air pipe of the low-pressure cylinder. The valve 802 is closed and the first connecting pipe 801 is disconnected.

[0058] Optionally, the valve 802 is a solenoid valve.

[0059] Optionally, the air conditioning system further includes a first gas-liquid separator, which is disposed on the first return air pipe 807 , and the first connecting pipe 801 is disposed upstream of the first gas-liquid separator.

[0060] The first connecting pipe 801 is arranged upstream of the first gas-liquid separator, so that part of the refrigerant is diverted into the second return air pipe 808 before the refrigerant passes through the first gas-liquid separator, thereby preventing excessive refrigerant from flowing into the first gas-liquid separator, which would cause the gas-liquid separation effect of the first gas-liquid separator to deteriorate.

[0061] Optionally, the air conditioning system further includes a second gas-liquid separator, which is disposed on the second air return pipe 808, and the first connecting pipe 801 is disposed upstream of the second gas-liquid separator.

[0062] The first connecting pipe 801 is arranged upstream of the second gas-liquid separator, so that the refrigerant entering the second return air pipe 808 through the first connecting pipe 801 flows into the return air port of the low-pressure cylinder after passing through the second gas-liquid separator, thereby preventing the refrigerant from causing liquid hammer to the low-pressure cylinder.

[0063] Optionally, the connecting pipe includes a second connecting pipe 803, which is connected between the first return air pipe 807 and the second return air pipe 808, and the control valve includes a one-way valve 804, which is arranged on the second connecting pipe 803, and the conducting direction of the one-way valve 804 is from the second return air pipe 808 to the first return air pipe 807.

[0064] When the pressure of the medium-pressure cylinder is relatively small and the pressure of the medium-pressure cylinder is lower than the pressure of the low-pressure cylinder by a preset threshold, the one-way valve 804 automatically opens and connects the second connecting pipe 803. At this time, part of the refrigerant in the low-pressure cylinder flows to the medium-pressure cylinder through the connecting pipe, and then this part of the refrigerant can be compressed in the medium-pressure cylinder. In this way, the volume of the medium-pressure cylinder is effectively utilized.

[0065] The second connecting pipe 803 is disposed in the shell.

[0066] Optionally, the air conditioning system further includes a second gas-liquid separator 806 , which is disposed in the second return air pipe 808 , and the second connecting pipe 803 is disposed downstream of the second gas-liquid separator 806 to prevent the liquid in the refrigerant from flowing into the medium-pressure cylinder through the second connecting pipe 803 .

[0067] Optionally, the air conditioning system further includes a first gas-liquid separator 805 , which is disposed on the first air return pipe 807 , and the second connecting pipe 803 is disposed downstream of the first gas-liquid separator 805 .

[0068] The refrigerant flowing into the second connecting pipe 803 passes through the second gas-liquid separator 806 , and therefore does not need to pass through the first gas-liquid separator 805 .

[0069] In one embodiment, the fourth connection port 204 is connected to the first indoor heat exchanger 601, and the third connection port 303 is connected to the second indoor heat exchanger 602, so that the first indoor heat exchanger 601 can operate cooling and the second indoor heat exchanger 602 can operate heating.

[0070] The first pipeline 709 further includes a first conducting pipe 7092 , one end of which is connected to both the first sub-pipeline 7091 and the second sub-pipeline 7101 , and the other end of which is connected to the fourth connecting port 204 .

[0071] The first conducting pipe 7092 realizes the connection between the first sub-pipeline 7091 and the fourth connecting port 204 , and the connection between the second sub-pipeline 7101 and the fourth connecting port 204 .

[0072] The air conditioning system further includes a first control switch 707 , a second conducting tube 7102 and a second control switch 708 .

[0073] The first control switch 707 is provided on the first conduction tube 7092 for controlling the on-off of the first conduction tube 7092 ; one end of the second conduction tube 7102 is connected to both the first branch 711 and the second branch 712 , and the other end is connected to the third interface 303 .

[0074] The second conducting tube 7102 realizes the connection between the first branch 711 and the third interface 303 , and the connection between the second branch 712 and the third interface 303 .

[0075] The second control switch 708 is disposed on the second conduction tube 7102 and is used to control the on and off of the second conduction tube 7102 .

[0076] A first control switch 707 and a second control switch 708 are respectively provided on the first conduction tube 7092 and the second conduction tube 7102 to control the on and off of the first conduction tube 7092 and the second conduction tube 7102 respectively.

[0077] Both the first control switch 707 and the second control switch 708 can be solenoid valves.

[0078] Optionally, there are multiple indoor heat exchangers, and the multiple indoor heat exchangers are connected in parallel.

[0079] like Figure 2 As shown, there are two indoor heat exchangers, and each indoor heat exchanger includes a first indoor heat exchanger 601 and a second indoor heat exchanger 602 .

[0080] In the same indoor heat exchanger, the first indoor heat exchanger 601 and the second indoor heat exchanger 602 can cool or heat at the same time, or one cools and the other heats. In multiple indoor heat exchangers, cooling or heating can be performed at the same time, or at least one indoor heat exchanger cools and at least one indoor heat exchanger heats. In this way, a variety of heat exchange scenarios can be formed.

[0081] Optionally, one indoor heat exchanger is located in one room, and different indoor heat exchangers are located in different rooms, so that different heat exchange scenarios can be achieved in different rooms.

[0082] The following takes the case where there are two indoor heat exchangers as an example to explain various operation modes of the air conditioning system. The air conditioning system further includes a first throttle valve 705 and a second throttle valve 706. The first throttle valve 705 is provided in a first pipeline 709 and is located between the first indoor heat exchanger 601 and the outdoor heat exchanger 40. The second throttle valve 706 is provided in a second pipeline 710 and is located between the second indoor heat exchanger 602 and the outdoor heat exchanger 40.

[0083] Exemplarily, the air conditioning system includes a full cooling mode, that is, both indoor heat exchangers are cooling. At this time, the first connection port 201 and the second connection port 202 are connected, the third connection port 203 is connected to the fourth connection port 204, and the second interface 302 is connected to the third interface 303. The compressor 10 only exhausts to the outdoor heat exchanger 40 through the four-way valve, and the refrigerant discharged from the exhaust ports of the medium-pressure cylinder and the low-pressure cylinder enters the first inlet and outlet 401 of the outdoor heat exchanger 40 through the first connection port 201 and the second connection port 202, and after flowing out from the second inlet and outlet 402, it is divided into the first pipeline 709 and the second pipeline 710, as shown in FIG. Figure 1 As shown. And by adjusting the opening of the first throttle valve 705 and the second throttle valve 706, the evaporation temperature of the first indoor heat exchanger 601 is greater than the evaporation temperature of the second indoor heat exchanger 602. The refrigerant flowing out of the first indoor heat exchanger 601 flows back to the return port of the medium-pressure cylinder through the fourth connection port 204 and the third connection port 203, and the refrigerant flowing out of the second indoor heat exchanger 602 flows back to the return port of the low-pressure cylinder through the third interface 303 and the second interface 302. The valve 802 is closed and the first connecting pipe 801 is blocked. And when the pressure difference between the medium-pressure cylinder and the low-pressure cylinder is less than the preset threshold, the one-way valve 804 automatically opens and makes the second connecting pipe 803 conductive. At this time, part of the refrigerant in the low-pressure cylinder flows to the medium-pressure cylinder through the second connecting pipe 803, and then this part of the refrigerant can be compressed in the medium-pressure cylinder. In this way, the volume of the medium-pressure cylinder is effectively utilized, and the energy efficiency of the air-conditioning system in the full heating mode is effectively improved.

[0084] Exemplarily, the air conditioning system includes a full heating mode, that is, the first indoor heat exchanger 601 and the second indoor heat exchanger 602 of the same indoor heat exchanger are both heating, at this time, the first connection port 201 and the fourth connection port 204 are connected, the third connection port 203 and the second connection port 202 are connected, the first interface 301 and the third interface 303 are connected, the medium pressure cylinder and the low pressure cylinder are exhausted to the first indoor heat exchanger 601 through the first connection port 201 and the fourth connection port 204, and are exhausted to the second indoor heat exchanger 602 through the first interface 301 and the third interface 303, as shown in FIG. Figure 2 As shown. The refrigerant flowing through the first indoor heat exchanger 601 and the second indoor heat exchanger 602 converges to the second inlet and outlet 402 of the outdoor heat exchanger 40, and flows out from the first inlet and outlet 401. At this time, the refrigerant flowing out of the outdoor heat exchanger 40 flows to the first return air pipe 807 through the second connecting port 202 and the third connecting port 203, and the amount of refrigerant in the second return air pipe 808 is reduced. At this time, the valve 802 is opened, the first connecting pipe 801 is connected, part of the refrigerant in the first return air pipe 807 flows into the second return air pipe 808, the medium-pressure cylinder is compressed normally, the refrigerant flow in the medium-pressure cylinder is normal and greater than the refrigerant flow of the low-pressure cylinder, the one-way valve 804 is closed, and the second connecting pipe 803 is blocked.

[0085] Exemplarily, the air conditioning system includes a reheat dehumidification mode, that is, the first indoor heat exchanger 601 is used for cooling and dehumidification, and the second indoor heat exchanger 602 is used for heating in the same indoor heat exchanger. At this time, the compressor 10 exhausts air to the outdoor heat exchanger 40 through the four-way valve, and exhausts air to the second indoor heat exchanger 602 through the three-way valve. At this time, the refrigerant of the first indoor heat exchanger 601 flows to the medium-pressure cylinder, and the refrigerant flow of the low-pressure cylinder is reduced. Valve 802 is opened and the one-way valve 804 is closed.

[0086] Exemplarily, the air conditioning system includes a simultaneous cooling and heating mode, that is, one of the first indoor heat exchanger 601 of one indoor heat exchanger and the second indoor heat exchanger 602 of another indoor heat exchanger cools and the other heats. Figure 3 As shown, taking the first indoor heat exchanger 601 in the right indoor heat exchanger for cooling and the second indoor heat exchanger 602 in the left indoor heat exchanger for heating as an example, at this time, the compressor 10 exhausts to the outdoor heat exchanger 40 through the four-way valve and exhausts to the second indoor heat exchanger 602 through the three-way valve. At this time, the refrigerant flowing out of the outdoor heat exchanger 40 and the refrigerant flowing out of the second indoor heat exchanger 602 will merge and flow into the first indoor heat exchanger 601 for cooling, and flow to the medium-pressure cylinder through the four-way valve, and the refrigerant flow rate of the low-pressure cylinder is reduced. Valve 802 is opened and the one-way valve 804 is closed.

[0087] Optionally, the refrigerant circulation loop is provided with an air supply branch 501, and the air supply branch 501 is used to supply air to the medium-pressure cylinder.

[0088] The air conditioning system further includes a converging pipeline, one end of which is connected to the second liquid inlet and outlet 402, and the other end is connected to both the first pipeline 709 and the second pipeline 710. A subcooler 50 and a third throttle valve are arranged on the converging pipeline, and outdoor personnel replacement, the third throttle valve and the subcooler are arranged in sequence. One end of the air supply branch 501 is connected between the subcooler 50 and the third throttle valve, and the other end is connected to the inlet of the first gas-liquid separator.

[0089] For example, in the reheat dehumidification mode of the air conditioning system, the compressor 10 exhausts air to the outdoor heat exchanger 40 through the four-way valve and exhausts air to the second indoor heat exchanger 602 through the three-way valve. At this time, the refrigerant in the first indoor heat exchanger 601 flows to the medium-pressure cylinder, while the refrigerant flow rate of the low-pressure cylinder is reduced, and the valve 802 is opened.

[0090] Embodiment 2:

[0091] like Figures 4 to 6As shown, the difference from the first embodiment is that the second connection port 202 is connected to the first liquid inlet and outlet 401 of the outdoor heat exchanger 40, the fourth connection port 204 is connected to the second liquid inlet and outlet 402 of the outdoor heat exchanger 40 through the first pipeline 709 and the second pipeline 710, the first pipeline 709 and the second pipeline 710 are connected in parallel, the first indoor heat exchanger 601 is arranged in the first pipeline 709, and the second indoor heat exchanger 602 is arranged in the second pipeline 710. Among them, the first liquid inlet and outlet 401 and the second liquid inlet and outlet 402 are connected, and the refrigerant flows into the outdoor heat exchanger 40 from the first liquid inlet and outlet 401 and flows out from the second liquid inlet and outlet 402, or the refrigerant flows into the outdoor heat exchanger 40 from the second liquid inlet and outlet 402 and flows out from the first liquid inlet and outlet 401.

[0092] The first pipeline 709 includes a first sub-pipeline 7091 connected between the first indoor heat exchanger 601 and the fourth connection port 204. The second pipeline 710 includes a second sub-pipeline 7101 connected between the second indoor heat exchanger 602 and the fourth connection port 204.

[0093] The air conditioning system further includes a first branch 711, a second branch 712, a first switch 701 component and a second switch 702 component. The first branch 711 is connected between the third interface 303 and the first indoor heat exchanger 601; the second branch 712 is connected between the third interface 303 and the second indoor heat exchanger 602; the first switch 701 component is provided in the first sub-pipeline 7091 and / or the first branch 711, and is used to control one of the first sub-pipeline 7091 and the first branch 711 to be connected; the second switch 702 component is provided in the second sub-pipeline 7101 and / or the second branch 712, and is used to control one of the second sub-pipeline 7101 and the second branch 712 to be connected.

[0094] The first sub-pipeline 7091, the second sub-pipeline 7101, the first branch 711 and the second branch 712 are arranged so that the first indoor heat exchanger 601 and the second indoor heat exchanger 602 are connected to both the fourth connection port 204 of the first reversing valve 20 and the third interface 303 of the second reversing valve 30. The first switch 701 component and the second switch 702 component are arranged to respectively control the connection between the first sub-pipeline 7091 and the first branch 711, and the connection between the second sub-pipeline 7101 and the second branch 712. In this way, the first indoor heat exchanger 601 can be selectively connected to the fourth connection port 204 or the third interface 303 according to the requirements of cooling, heating, etc., and the second indoor heat exchanger 602 can be connected to the fourth connection port 204 or the third interface 303, so that the first indoor heat exchanger 601 and the second indoor heat exchanger 602 can both participate in the refrigerant circulation, thereby improving the efficiency of air conditioning cooling and heating.

[0095] The first switch 701 assembly includes a first switch 701 provided in the first sub-pipeline 7091 and a second switch 702 provided in the first branch 711, and the second switch 702 assembly includes a third switch 703 provided in the second sub-pipeline 7101 and a fourth switch 704 provided in the third branch. At least one of the first switch 701, the second switch 702, the third switch 703 and the fourth switch 704 is a solenoid valve. It can be understood that the first switch 701 assembly can also be other switches that can realize one of the first sub-pipeline 7091 and the first branch 711 to be connected and the other to be disconnected; the second switch 702 assembly can also be other switches that can realize one of the second sub-pipeline 7101 and the second branch 712 to be connected and the other to be disconnected. For example, both the first switch 701 assembly and the second switch 702 assembly are three-way valves.

[0096] When the first switch assembly is a three-way valve, one port of the three-way valve is connected to the first indoor heat exchanger, and the other two ports are connected to the first sub-pipeline and the first branch respectively.

[0097] When the second switch assembly is a three-way valve, one port of the three-way valve is connected to the second indoor heat exchanger, and the other two ports are connected to the second sub-pipeline and the second branch respectively.

[0098] The first throttle valve 705 is disposed in the first pipeline 709, and the first throttle valve 705, the first indoor heat exchanger 601 and the first switch 701 components are disposed in sequence.

[0099] The second throttle valve 706 is disposed in the second pipeline 710, and the second throttle valve 706, the second indoor heat exchanger 602 and the second switch 702 components are disposed in sequence.

[0100] The compressor 10 includes a medium-pressure cylinder and a low-pressure cylinder; wherein the first connecting port 201 is connected to the exhaust ports of the medium-pressure cylinder and the low-pressure cylinder, the third connecting port 203 is connected to the return air port of the medium-pressure cylinder, the first interface 301 is connected to the exhaust ports of the medium-pressure cylinder and the low-pressure cylinder, and the second interface 302 is connected to the return air port of the low-pressure cylinder.

[0101] Optionally, there are multiple indoor heat exchangers, and the multiple indoor heat exchangers are connected in parallel.

[0102] like Figure 4 As shown, there are two indoor heat exchangers, and each indoor heat exchanger includes a first indoor heat exchanger 601 and a second indoor heat exchanger 602 .

[0103] Exemplarily, the air conditioning system includes a full cooling mode, that is, both indoor heat exchangers are cooling. At this time, the first connection port 201 and the second connection port 202 are connected, the third connection port 203 is connected to the fourth connection port 204, and the second interface 302 is connected to the third interface 303. The compressor 10 only exhausts to the outdoor heat exchanger 40 through the four-way valve, and the refrigerant discharged from the exhaust ports of the medium-pressure cylinder and the low-pressure cylinder enters the first inlet and outlet 401 of the outdoor heat exchanger 40 through the first connection port 201 and the second connection port 202, and after flowing out from the second inlet and outlet 402, it is divided into the first pipeline 709 and the second pipeline 710, as shown in FIG. Figure 4 As shown. And by adjusting the opening of the first throttle valve 705 and the second throttle valve 706, the evaporation temperature of the first indoor heat exchanger 601 is greater than the evaporation temperature of the second indoor heat exchanger 602. The first switch 701 and the fourth switch 704 are turned on, and the second switch 702 and the third switch 703 are turned off. The refrigerant flowing out of the first indoor heat exchanger 601 flows back to the return port of the medium pressure cylinder through the first sub-pipeline 7091, the fourth connection port 204 and the third connection port 203, and the refrigerant flowing out of the second indoor heat exchanger 602 flows back to the return port of the low pressure cylinder through the second branch 712, the third interface 303 and the second interface 302. The valve 802 is closed and the first connecting pipe 801 is blocked. And when the pressure difference between the medium pressure cylinder and the low pressure cylinder is less than the preset threshold value, the one-way valve 804 automatically opens and makes the second connecting pipe 803 conductive. At this time, part of the refrigerant in the low-pressure cylinder flows to the medium-pressure cylinder through the second connecting pipe 803, and then this part of the refrigerant can be compressed in the medium-pressure cylinder. In this way, the volume of the medium-pressure cylinder is effectively utilized, and the energy efficiency of the air-conditioning system in the full heating mode is effectively improved.

[0104] Exemplarily, the air conditioning system includes a full heating mode, that is, the first indoor heat exchanger 601 and the second indoor heat exchanger 602 of the same indoor heat exchanger are both heating, at this time, the first connection port 201 and the fourth connection port 204 are connected, the third connection port 203 and the second connection port 202 are connected, the first interface 301 and the third interface 303 are connected, the second switch 702 and the third switch 703 are turned on, and the first switch 701 and the fourth switch 704 are turned off. The medium pressure cylinder and the low pressure cylinder exhaust to the first indoor heat exchanger 601 through the first connection port 201 and the fourth connection port 204, the first branch 711, and exhaust to the second indoor heat exchanger 602 through the first interface 301, the third interface 303 and the second sub-pipeline 7101, as shown in FIG. Figure 5As shown. The refrigerant flowing through the first indoor heat exchanger 601 and the second indoor heat exchanger 602 converges to the second inlet and outlet 402 of the outdoor heat exchanger 40, and flows out from the first inlet and outlet 401. At this time, the refrigerant flowing out of the outdoor heat exchanger 40 flows to the first return air pipe 807 through the second connecting port 202 and the third connecting port 203, and the amount of refrigerant in the second return air pipe 808 is reduced. At this time, the valve 802 is opened, the first connecting pipe 801 is connected, part of the refrigerant in the first return air pipe 807 flows into the second return air pipe 808, the medium-pressure cylinder is compressed normally, the refrigerant flow in the medium-pressure cylinder is normal and greater than the refrigerant flow of the low-pressure cylinder, the one-way valve 804 is closed, and the second connecting pipe 803 is blocked.

[0105] Exemplarily, the air conditioning system includes a reheat dehumidification mode, that is, the first indoor heat exchanger 601 is used for cooling and dehumidification, and the second indoor heat exchanger 602 is used for heating in the same indoor heat exchanger. At this time, the compressor 10 exhausts air to the outdoor heat exchanger 40 through the four-way valve, and exhausts air to the second indoor heat exchanger 602 through the three-way valve. At this time, the refrigerant of the first indoor heat exchanger 601 flows to the medium-pressure cylinder, and the refrigerant flow of the low-pressure cylinder is reduced. Valve 802 is opened and the one-way valve 804 is closed.

[0106] Exemplarily, the air conditioning system includes a simultaneous cooling and heating mode, that is, one indoor heat exchanger is cooling and the other is heating. For example, the right indoor heat exchanger is cooling and the left indoor heat exchanger is heating. Figure 6 As shown, at this time, the second switch 702 and the fourth switch 704 of the left indoor heat exchanger are turned on, the first switch 701 and the third switch 703 are turned off, the first switch 701 and the third switch 703 of the right indoor heat exchanger are turned on, the second switch 702 and the fourth switch 704 are turned off, and the compressor 10 exhausts air to the outdoor heat exchanger 40 through the four-way valve, and exhausts air to the first indoor heat exchanger 601 and the second indoor heat exchanger 602 of the left indoor heat exchanger through the three-way valve. At this time, the refrigerant flowing out of the outdoor heat exchanger 40 merges with the refrigerant flowing out of the left indoor heat exchanger and flows into the right indoor heat exchanger, and the refrigerant flows through the first indoor heat exchanger 601 and the second indoor heat exchanger 602 of the right indoor heat exchanger. The right indoor heat exchanger operates for cooling, and flows to the medium-pressure cylinder through the four-way valve, and the refrigerant flow rate of the low-pressure cylinder is reduced. Valve 802 is opened, and the one-way valve 804 is closed.

[0107] Optionally, the refrigerant circulation loop is provided with an air supply branch 501 , and the air supply branch 501 is used to supply air to the medium-pressure cylinder, and a liquid storage tank 502 is provided on the air supply branch 501 .

[0108] The air conditioning system further includes a merging pipeline, one end of which is connected to the second liquid inlet and outlet 402, and the other end is connected to both the first pipeline 709 and the second pipeline 710. The merging pipeline is provided with a subcooler 50 and a third throttle valve. One end of the branch is connected between the subcooler 50 and the third throttle valve, and the other end is connected to the inlet of the first gas-liquid separator.

[0109] For example, in the reheat dehumidification mode of the air conditioning system, the compressor 10 exhausts air to the outdoor heat exchanger 40 through the four-way valve and exhausts air to the second indoor heat exchanger 602 through the three-way valve. At this time, the refrigerant in the first indoor heat exchanger 601 flows to the medium-pressure cylinder, while the refrigerant flow rate of the low-pressure cylinder is reduced, and the valve 802 is opened.

[0110] The present application also provides an air conditioner, comprising an air conditioning system as described in any one of the above embodiments.

[0111] The air conditioner provided in the present application includes the air conditioning system as described in any one of the above embodiments, and thus has all the beneficial effects of the air conditioning system as described in any one of the above embodiments, which will not be repeated here.

[0112] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An air conditioning system, characterized in that: include: A compressor (10), a first reversing valve (20), an outdoor heat exchanger (40), and an indoor heat exchanger (60), wherein the indoor heat exchanger comprises a first indoor heat exchanger (601) and a second indoor heat exchanger (602), wherein the first reversing valve (20) comprises first to fourth connecting ports (204), the first connecting port (201) being connected to the exhaust port of the compressor (10), the second connecting port (202) being connected to the outdoor heat exchanger (40), the third connecting port (203) being connected to the return air port of the compressor (10), and the fourth connecting port (204) being connected to the first indoor heat exchanger (601) through a first pipeline (709) and to the second indoor heat exchanger (602) through a second pipeline The first pipeline (709) and the second pipeline (710) are connected to the second indoor heat exchanger (602); the first pipeline (709) and the second pipeline (710) are connected in parallel; the first indoor heat exchanger (601) is arranged on the first pipeline (709); the second indoor heat exchanger (602) is arranged on the second pipeline (710); the first pipeline (709) includes a first sub-pipeline (7091); the first sub-pipeline (7091) is connected between the first indoor heat exchanger (601) and the fourth connecting port (204); the second pipeline (710) includes a second sub-pipeline (7101); the second sub-pipeline (7101) is connected between the second indoor heat exchanger (602) and the fourth connecting port (204); A second reversing valve (30) comprises first to third interfaces (303), the first interface (301) being connected to an exhaust port of the compressor (10), and the second interface (302) being connected to an air return port of the compressor (10); A first branch (711) is connected between the third interface (303) and the first indoor heat exchanger (601); The second branch (712) is connected between the third interface (303) and the second indoor heat exchanger (602); A first switch component, provided in the first sub-pipeline (7091) and / or the first branch (711), and used to control the conduction of one of the first sub-pipeline (7091) and the first branch (711); The second switch component is arranged in the second sub-pipeline (7101) and / or the second branch (712), and is used to control the conduction of one of the second sub-pipeline (7101) and the second branch (712).

2. The air conditioning system according to claim 1, characterized in that: The first switch assembly comprises: A first switch (701), provided in the first sub-pipeline (7091), for controlling the on-off of the first sub-pipeline (7091); The second switch (702) is provided on the first branch (711) and is used to control the on and off of the first branch (711).

3. The air conditioning system according to claim 2, characterized in that: The first switch (701) and / or the second switch (702) is a solenoid valve, and is configured so that one of the first switch (701) and the second switch (702) is selectively opened.

4. The air conditioning system according to claim 1, characterized in that: The second switch assembly comprises: A third switch (703), provided in the second sub-pipeline (7101), for controlling the on-off of the second sub-pipeline (7101); The fourth switch (704) is provided on the second branch (712) and is used to control the on and off of the second branch (712).

5. The air conditioning system according to claim 4, characterized in that: The third switch (703) and / or the fourth switch (704) is a solenoid valve, and is configured so that one of the third switch (703) and the fourth switch (704) is selectively opened.

6. The air conditioning system according to claim 1, characterized in that: The first switch assembly is a three-way valve, one port of the three-way valve is connected to the first indoor heat exchanger, and the other two ports are connected to the first sub-pipeline and the first branch respectively; and / or The second switch assembly is a three-way valve, one port of the three-way valve is connected to the second indoor heat exchanger, and the other two ports are connected to the second sub-pipeline and the second branch respectively.

7. The air conditioning system according to any one of claims 1 to 6, characterized in that: Also includes: A first throttle valve (705) is arranged on the first pipeline (709), and the first throttle valve (705), the first indoor heat exchanger (601) and the first switch (701) component are arranged in sequence; The second throttle valve (706) is arranged in the second pipeline (710), and the second throttle valve (706), the second indoor heat exchanger (602) and the second switch (702) component are arranged in sequence.

8. The air conditioning system according to any one of claims 1 to 6, characterized in that: The compressor (10) comprises: Medium pressure cylinder and low pressure cylinder; Among them, the first connecting port (201) is connected to the exhaust ports of the medium-pressure cylinder and the low-pressure cylinder, the third connecting port (203) is connected to the return port of the medium-pressure cylinder, the first interface (301) is connected to the exhaust ports of the medium-pressure cylinder and the low-pressure cylinder, and the second interface (302) is connected to the return port of the low-pressure cylinder.

9. The air conditioning system according to any one of claims 1 to 6, characterized in that: There are multiple indoor heat exchangers, and the multiple indoor heat exchangers are connected in parallel.

10. An air conditioner, characterized in that: An air conditioning system comprising the air conditioning system as claimed in any one of claims 1 to 9.

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