Air conditioning system with defrost circuit

Abstract

The application relates to the technical field of air conditioning systems, and discloses an air conditioning system with a defrosting circuit, which comprises a compressor, a first heat exchanger, a second heat exchanger, a hot water supply unit and a cooling and heating supply unit. The compressor comprises an exhaust port and a suction port. The first heat exchanger comprises a first fluorine channel and an air channel capable of exchanging heat with each other. The second heat exchanger comprises a second fluorine channel and a water channel capable of exchanging heat with each other. The hot water supply unit comprises a first water tank and a first water circulation circuit communicated with the water channel, and the first water circulation circuit is used for adjusting the temperature of the first water tank. The cooling and heating supply unit comprises a cooling and heating terminal and a second water circulation circuit communicated with the water channel, and the second water circulation circuit is used for adjusting the temperature of the cooling and heating terminal. The defrosting unit is provided with the defrosting circuit, the defrosting circuit comprises a first pipe section and a second pipe section, the first pipe section is arranged in the first water tank, and the second pipe section is arranged close to the first fluorine channel, so that the heat of the first water tank can be used to defrost the first fluorine channel.

Description

Technical Field

[0001] This application relates to the field of air conditioning system technology, for example to an air conditioning system with a defrosting circuit. Background Technology

[0002] With the improvement of living standards, people's demand for air conditioning (cooling and heating) and domestic hot water is constantly increasing, which has promoted the development of tri-generation air conditioning systems. Related technology discloses a tri-generation air conditioning system, including a heat pump unit, a hot water side, and an air conditioning side. When performing air conditioning cooling, air conditioning cooling and hot water production, underfloor heating, underfloor heating and hot water production, and hot water production, corresponding controls are applied to the cooling expansion valve, heating expansion valve, water flow switch, enthalpy injection solenoid valve, air conditioning circulating water pump, air conditioning cooling solenoid valve, hot water circulating water pump, heat recovery expansion valve, and underfloor heating solenoid valve.

[0003] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0004] Tri-generation air conditioning systems are difficult to defrost effectively.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides an air conditioning system with a defrosting circuit, which solves the problem of ineffective defrosting.

[0008] In some embodiments, the air conditioning system having a defrosting circuit includes:

[0009] The compressor includes an exhaust port and an intake port;

[0010] The first heat exchanger includes a first fluorine passage and an air passage that are capable of exchanging heat with each other;

[0011] The second heat exchanger includes a second refrigerant channel and a water channel that can exchange heat with each other; wherein, the compressor's exhaust port, first refrigerant channel, second refrigerant channel and suction port are connected to form a refrigerant circulation loop;

[0012] A hot water supply unit includes a first water tank and a first water circulation loop connected to a water channel, wherein the first water circulation loop is used to regulate the temperature of the first water tank;

[0013] The heating and cooling unit includes a heating and cooling terminal and a second water circulation loop connected to a water channel. The second water circulation loop is used to regulate the temperature of the heating and cooling terminal.

[0014] The defrosting unit includes a defrosting circuit, which includes a first pipe section and a second pipe section that are interconnected. The first pipe section is located inside a first water tank, and the second pipe section is located near a first refrigerant channel, so that the heat from the first water tank can be used to defrost the first refrigerant channel.

[0015] The air conditioning system with a defrosting circuit provided in this embodiment can achieve the following technical effects:

[0016] The air conditioning system includes two heat exchangers. The first heat exchanger, which can be called an air-refrigerant dual-medium heat exchanger, uses a fan to guide airflow along the air channel, and the heat generated in the first refrigerant channel can be transferred to the air channel. The second heat exchanger, which can be called a water-refrigerant dual-medium heat exchanger, allows heat exchange between the second refrigerant channel and the water channel. Since both the first and second water circulation loops are connected to the water channel, heat can be transferred through the water channel to both the first and second water circulation loops when the second refrigerant channel exchanges heat with the water channel. The first water circulation loop then regulates the temperature of the first water tank, and the second water circulation loop regulates the temperature of the cooling and heating terminals. Furthermore, the heat from the first water tank can be transferred through the first pipe section to the defrost circuit, and then to the second pipe section. Because the second pipe section is located close to the first refrigerant channel, heat can continue to be transferred to the first refrigerant channel, thus defrosting it. In this way, the air conditioning system has a simple and ingenious layout, achieving cooling, heating, and hot water supply functions, also known as a tri-generation system. Moreover, the defrost unit utilizes the heat from the first water tank to defrost the first refrigerant channel.

[0017] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0019] Figure 1 This is a schematic diagram of the structure of an air conditioning system provided in an embodiment of this disclosure;

[0020] Figure 2 This is a schematic diagram of the refrigerant flow direction under the cooling mode provided in the embodiments of this disclosure;

[0021] Figure 3 This is a schematic diagram of the refrigerant flow direction under the heating mode provided in the embodiments of this disclosure;

[0022] Figure 4 This is a schematic diagram of the refrigerant flow direction in heating and hot water modes provided in the embodiments of this disclosure;

[0023] Figure 5 This is a schematic diagram of the refrigerant flow direction in the hot water mode provided in this embodiment of the disclosure;

[0024] Figure 6 This is a schematic diagram of the refrigerant flow direction in the first defrosting mode provided in this embodiment of the present disclosure;

[0025] Figure 7 This is a schematic diagram of the refrigerant flow direction in the second defrosting mode provided in this embodiment of the present disclosure;

[0026] Figure 8 This is a schematic diagram of the refrigerant flow direction in the third defrosting mode provided in the embodiments of this disclosure.

[0027] Figure label:

[0028] 1. Compressor; 11. Discharge port; 12. Inlet port; 13. Four-way reversing valve; 14. Throttling device;

[0029] 2. First heat exchanger; 21. First refrigerant channel;

[0030] 3. Second heat exchanger; 31. Second refrigerant channel; 32. Water channel;

[0031] 4. Defrosting circuit; 41. First pipe section; 42. Second pipe section; 43. First open valve; 44. First water pump; 45. First water tank; 451. First water inlet; 452. Second water inlet; 453. Inlet pipe; 454. Outlet pipe;

[0032] 5. First water circulation loop; 51. First water path; 52. Second water path; 53. Third pipe section; 54. Second control valve; 55. Second water pump;

[0033] 6. Second water circulation loop; 61. Third water circuit; 62. Fourth water circuit; 63. Third control valve; 64. Heating and cooling terminal; 641. Underfloor heating coil; 642. Fan coil unit; 65. Second water tank. Detailed Implementation

[0034] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0035] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for describing embodiments of this disclosure herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0036] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0037] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" 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, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0038] Unless otherwise stated, the term "multiple" means two or more.

[0039] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0040] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0042] This disclosure provides an air conditioning system (hereinafter referred to as the air conditioning system) with a defrosting circuit 4, such as Figure 1As shown, the air conditioning system includes a compressor 1, a first heat exchanger 2, a second heat exchanger 3, a hot water supply unit, a cooling and heating unit, and a defrosting unit. The compressor 1 includes an exhaust port 11 and an intake port 12. The first heat exchanger 2 includes a first refrigerant channel 21 and an air channel capable of exchanging heat with each other. The second heat exchanger 3 includes a second refrigerant channel 31 and a water channel 32 capable of exchanging heat with each other. The exhaust port 11, the first refrigerant channel 21, the second refrigerant channel 31, and the intake port 12 of the compressor 1 are connected to form a refrigerant circulation loop. The hot water supply unit includes a first water tank 45 and a first water circulation loop 5 connected to the water channel 32. The first water circulation loop 5 is used to regulate the temperature of the first water tank 45. The cooling and heating unit includes a cooling / heating terminal 64 and a second water circulation loop 6 connected to the water channel 32. The second water circulation loop 6 is used to regulate the temperature of the cooling / heating terminal 64. The defrosting unit includes a defrosting circuit 4, which includes a first pipe section 41 and a second pipe section 42. The first pipe section 41 is located inside the first water tank 45, and the second pipe section 42 is located near the first refrigerant channel 21, so that the heat of the first water tank 45 can be used to defrost the first refrigerant channel 21.

[0043] In this embodiment, the air conditioning system includes two heat exchangers. The first heat exchanger 2 can be referred to as an air-fluorine dual-medium heat exchanger, which uses a fan to guide airflow along the air channel, and the heat generated by the first fluorine channel 21 can be transferred to the air channel. The second heat exchanger 3 can be referred to as a water-fluorine dual-medium heat exchanger, and the second fluorine channel 31 can exchange heat with the water channel 32. Since both the first water circulation loop 5 and the second water circulation loop 6 are connected to the water channel 32, when the second fluorine channel 31 exchanges heat with the water channel 32, heat can be transferred through the water channel 32 to the first water circulation loop 5 and the second water circulation loop 6. The first water circulation loop 5 is used to regulate the temperature of the first water tank 45, and the second water circulation loop 6 is used to regulate the temperature of the heating / cooling terminal 64. Furthermore, the heat from the first water tank 45 can be transferred through the first pipe section 41 to the defrosting circuit 4, and then to the second pipe section 42. Since the second pipe section 42 is located close to the first fluorine channel 21, heat can continue to be transferred to the first fluorine channel 21, thereby defrosting the first fluorine channel 21. In this way, the air conditioning system has a simple and ingenious layout, which can realize the functions of cooling, heating and hot water supply, also known as tri-generation. Furthermore, under the action of the defrosting unit, the heat of the first water tank 45 can be used to defrost the first refrigerant channel 21.

[0044] Optionally, the second pipe section 42 is constructed as a serpentine or spiral pipe. In this embodiment, the design of the second pipe section 42 helps to increase its heat transfer area and improve the defrosting effect. For example, when the second pipe section 42 is constructed as a spiral pipe, the first fluorine channel 21 is arranged along the spiral axis of the second pipe section 42.

[0045] Optionally, the second pipe segment 42 is installed on the outer surface of the first fluorine channel 21 via a bracket structure or a snap-fit ​​structure, and there is a gap between the second pipe segment 42 and the first fluorine channel 21. In this embodiment, after installation, the second pipe segment 42 does not directly contact the first fluorine channel 21, but maintains a certain heat transfer distance from the first fluorine channel 21.

[0046] Optionally, such as Figure 1 As shown, the defrosting circuit 4 is equipped with a first open valve 43 and a first water pump 44. When the first water pump 44 is turned on and the first open valve 43 is turned on, the defrosting circuit 4 is open.

[0047] Optionally, such as Figure 1 As shown, the first water circulation loop 5 includes a first water path 51 and a second water path 52. The first end of the first water path 51 is connected to the first end of the water channel 32, and the second end of the first water path 51 is connected to the first water outlet 451 of the first water tank 45. A second guide valve 54 is provided on the first water path 51. The first end of the second water path 52 is connected to the second end of the water channel 32, and the second end of the second water path 52 is connected to the second water outlet 452 of the first water tank 45. A second water pump 55 is provided on the second water path 52.

[0048] In this embodiment, when the second water pump 55 is turned on and the second conduction valve 54 is turned on, the first water circulation loop 5 is circulated. When the water channel 32 exchanges heat with the second refrigerant channel 31, heat is transferred through the water channel 32 to the first water circulation loop 5, and then to the first water tank 45, thereby heating the first water tank 45.

[0049] Optionally, the water inside the first water tank 45 can flow directly into the first water circulation loop 5 from the first water outlet 451.

[0050] Optionally, such as Figure 1 As shown, the first water circulation loop 5 also includes a third pipe section 53. The third pipe section 53 is disposed inside the first water tank 45, with its first end connected to the inner side of the first water inlet 451 and its second end connected to the inner side of the second water inlet 452. Furthermore, the second end of the first water passage 51 is connected to the outer side of the first water inlet 451, and the second end of the second water passage 52 is connected to the outer side of the second water inlet 452. In this embodiment, the water inside the first water tank 45 does not participate in the flow of the first water circulation loop 5, and antifreeze can be filled into the first water circulation loop 5.

[0051] Optionally, the first water tank 45 is provided with an inlet pipe 453 and an outlet pipe 454. The inlet pipe 453 is used to replenish water into the first water tank 45, and the outlet pipe 454 is connected to a water-using device. When the water level in the first water tank 45 is insufficient, room temperature water is added to the first water tank 45 through the inlet pipe 453. The heated hot water in the first water tank 45 flows to the water-using device through the outlet pipe 454. A mixing valve is provided on the outlet pipe 454, and the inlet pipe 453 is connected to the mixing valve through a mixing branch. When the mixing valve is closed, room temperature water flows in the inlet pipe 453, and hot water flows in the outlet pipe 454. When the mixing valve is open, the room temperature water in the inlet pipe 453 flows to the outlet pipe 454 through the mixing branch, and the room temperature water and hot water mix before flowing to the water-using device.

[0052] Optionally, such as Figure 1 As shown, the second water circulation loop 6 includes a third water path 61 and a fourth water path 62. The first end of the third water path 61 is connected to the first water path 51 and is located between the first end of the water channel 32 and the second control valve 54. The second end of the third water path 61 is connected to the first end of the heating / cooling terminal 64 via the third control valve 63. The first end of the fourth water path 62 is connected to the second water path 52 and is located between the second water pump 55 and the second water inlet 452. The second end of the fourth water path 62 is connected to the second end of the heating / cooling terminal 64.

[0053] In this embodiment, with the second water pump 55 turned on and the third control valve 63 turned on, the second water circulation loop 6 is in operation. When the water channel 32 exchanges heat with the second refrigerant channel 31, heat is transferred through the water channel 32 to the second water circulation loop 6, and then to the heating / cooling terminal 64, thereby regulating the temperature of the heating / cooling terminal 64.

[0054] Optionally, the heating and cooling terminal 64 includes a floor heating coil 641 and a fan coil unit 642. The third control valve 63 is a three-way valve with a first valve port, a second valve port, and a third valve port. The first valve port is connected to the first end of the water channel 32, the first end of the fan coil unit 642 is connected to the second valve port, and the first end of the floor heating coil 641 is connected to the third valve port. The second ends of the fan coil unit 642 and the second ends of the floor heating coil 641 meet and are connected to the second end of the water channel 32. In this way, the floor heating coil 641 and the fan coil unit 642 are arranged in parallel on the second water circulation loop 6. The floor heating coil 641 transfers heat to the room through floor radiation. A fan is provided on one side of the fan coil unit 642, and the airflow of the fan transfers the heat or cold energy of the fan coil unit 642 to the room.

[0055] Optionally, a second water tank 65 is provided on the second water circulation loop, and the second water tank 65 is located between the first end of the water channel 32 and the third guide valve 63. The second water tank 65 serves as a buffer tank, which regulates the water volume and stabilizes the pressure.

[0056] Optionally, the discharge port 11 of the compressor 1 is connected to a four-way reversing valve 13. The four-way reversing valve 13 includes valve port C, valve port D, valve port E, and valve port S. Valve port D is connected to the discharge port 11, valve port S is connected to the suction port 12, valve port E is connected to the first end of the first refrigerant passage 21, and valve port C is connected to the first end of the second refrigerant passage 31. When valve port D and valve port E are connected, the refrigerant flows from the first refrigerant passage 21 to the second refrigerant passage 31. When valve port D and valve port C are connected, the refrigerant flows from the second refrigerant passage 31 to the first refrigerant passage 21. Furthermore, a throttling device 14 is provided between the second end of the first refrigerant passage 21 and the second end of the second refrigerant passage 31. When refrigerant is flowing in the refrigerant circulation loop, the throttling device 14 throttles and reduces the pressure of the flowing refrigerant.

[0057] Optionally, the air conditioning system includes a cooling mode. The cooling mode corresponds to: refrigerant flowing from the first refrigerant passage 21 to the second refrigerant passage 31, the first water pump 44 being turned off and the second water pump 55 being turned on, the second open valve 54 being turned off and the third open valve 63 being turned on.

[0058] In this embodiment, the refrigerant circulation path in the cooling mode is as follows: Figure 2 As shown. Valve port D is connected to valve port E, and valve port C is connected to valve port S, allowing refrigerant to flow from the first refrigerant channel 21 to the second refrigerant channel 31. At this time, the first refrigerant channel 21 generates heat, and the second refrigerant channel 31 generates cooling. With the second open valve 54 closed, there is no water flowing in the first water circulation loop 5. With the second water pump 55 open and the third open valve 63 open, the second water circulation loop 6 is open. At this time, water channel 32 exchanges heat with the second refrigerant channel 31, and the cooling is transferred to the cooling / heating terminal 64 through the second water circulation loop 6. Thus, cooling is achieved using the cooling / heating terminal 64.

[0059] Optionally, the air conditioning system includes a heating mode. The heating mode corresponds to: refrigerant flowing from the second refrigerant passage 31 to the first refrigerant passage 21, the first water pump 44 being turned off and the second water pump 55 being turned on, the second open valve 54 being turned off and the third open valve 63 being turned on.

[0060] In this embodiment, the refrigerant circulation path in the heating mode is as follows: Figure 3 As shown. Valve port D is connected to valve port C and valve port E is connected to valve port S, allowing refrigerant to flow from the second refrigerant channel 31 to the first refrigerant channel 21. At this time, the first refrigerant channel 21 generates cooling and the second refrigerant channel 31 generates heat. When the second open valve 54 is closed, there is no water flowing in the first water circulation loop 5. When the second water pump 55 is on and the third open valve 63 is on, the second water circulation loop 6 is open. At this time, water channel 32 exchanges heat with the second refrigerant channel 31, and transfers the heat to the heating / cooling terminal 64 through the second water circulation loop 6. Thus, heating is generated using the heating / cooling terminal 64.

[0061] Optionally, the air conditioning system includes heating and hot water modes. The heating and hot water modes correspond to: refrigerant flowing from the second refrigerant passage 31 to the first refrigerant passage 21, the first water pump 44 being turned off and the second water pump 55 being turned on, and both the second open valve 54 and the third open valve 63 being turned on.

[0062] In this embodiment, the refrigerant circulation path for heating and hot water modes is as follows: Figure 4 As shown. Valve port D is connected to valve port C, and valve port E is connected to valve port S, allowing refrigerant to flow from the second refrigerant channel 31 to the first refrigerant channel 21. At this time, the first refrigerant channel 21 generates cooling, and the second refrigerant channel 31 generates heat. With the second water pump 55 and the third open valve 63 open, the second water circulation loop 6 is open, and water channel 32 exchanges heat with the second refrigerant channel 31. The hot water in water channel 32 can flow through the third water path 61 to the heating / cooling terminal 64, and after heating the heating / cooling terminal 64, it flows back to water channel 32 through the fourth water path 62. With the second open valve 54 open, the first water circulation loop 5 is open, and the hot water in water channel 32 can flow through the first water path 51 to the first water tank 45, and after heating the first water tank 45, it flows back to water channel 32 through the second water path 52. Thus, heating is generated using the heating / cooling terminal 64, and hot water is supplied using the first water tank 45.

[0063] Optionally, the air conditioning system includes a hot water mode. The hot water mode corresponds to: refrigerant flowing from the second refrigerant passage 31 to the first refrigerant passage 21, the first water pump 44 being turned off and the second water pump 55 being turned on, the second open valve 54 being turned on and the third open valve 63 being turned off.

[0064] In this embodiment, the refrigerant circulation path in hot water mode is as follows: Figure 5 As shown. Valve port D is connected to valve port C and valve port E is connected to valve port S, allowing refrigerant to flow from the second refrigerant channel 31 to the first refrigerant channel 21. At this time, the first refrigerant channel 21 generates cooling and the second refrigerant channel 31 generates heat. With the second water pump 55 on and the third control valve 63 closed, there is no water flow to the heating / cooling terminal 64. With the second control valve 54 open, the first water circulation loop 5 is open, and water channel 32 exchanges heat with the second refrigerant channel 31. Hot water in water channel 32 can flow to the first water tank 45 through the first water path 51, and after heating the first water tank 45, it flows back to water channel 32 through the second water path 52. In this way, hot water is supplied using the first water tank 45.

[0065] Optionally, the air conditioning system includes a first defrost mode. The first defrost mode corresponds to: compressor 1 stopping, first water pump 44 starting, and first open valve 43 opening.

[0066] In this embodiment, the refrigerant circulation path of the first defrosting mode is as follows: Figure 6As shown. When compressor 1 is off, the refrigerant circulation loop is not flowing. When the first water pump 44 is on and the first open valve 43 is open, the defrost loop 4 is flowing. At this time, the heat from the first water tank 45 can be transferred to the defrost loop 4 through the first pipe section 41, and then to the second pipe section 42. Since the second pipe section 42 is located close to the first refrigerant passage 21, the heat can continue to be transferred to the first refrigerant passage 21, thereby defrosting the first refrigerant passage 21. In this way, the heat from the first water tank 45 is used to defrost the first refrigerant passage 21.

[0067] Optionally, the air conditioning system includes a second defrost mode. The second defrost mode corresponds to: compressor 1 stopping, first water pump 44 shutting down and second water pump 55 turning on, second open valve 54 opening and third open valve 63 closing.

[0068] In this embodiment, the refrigerant circulation path of the second defrosting mode is as follows: Figure 7 As shown. When compressor 1 is off, the refrigerant circulation loop is not flowing. When the second water pump 55 is on and the second open valve 54 is open, the first water circulation loop 5 is flowing. At this time, the heat from the first water tank 45 can be transferred to the first water circulation loop 5 through the third pipe section 53, and then to the water channel 32. Heat exchange occurs between the water channel 32 and the second refrigerant channel 31, thereby defrosting the second refrigerant channel 31. In this way, the heat from the first water tank 45 is used to defrost the second refrigerant channel 31.

[0069] Optionally, the air conditioning system includes a third defrost mode. The third defrost mode corresponds to: refrigerant flowing from the second refrigerant passage 31 to the first refrigerant passage 21, the first water pump 44 being turned on and the second water pump 55 being turned on, the first open valve 43 being turned on and the third open valve 63 being turned on.

[0070] In this embodiment, the refrigerant circulation path of the third defrosting mode is as follows: Figure 8 As shown. Valve port D is connected to valve port C and valve port E is connected to valve port S, allowing refrigerant to flow from the second refrigerant channel 31 to the first refrigerant channel 21. At this time, the first refrigerant channel 21 generates cooling and the second refrigerant channel 31 generates heat. The second open valve 54 can be opened or closed. When the second water pump 55 is on and the third open valve 63 is on, the second water circulation loop 6 is open. At this time, water channel 32 exchanges heat with the second refrigerant channel 31 and transfers the heat to the heating / cooling terminal 64 through the second water circulation loop 6. Simultaneously, when the first water pump 44 is on and the first open valve 43 is on, the defrosting loop 4 is open. At this time, the heat from the first water tank 45 can be transferred to the defrosting loop 4 through the first pipe section 41, and then to the second pipe section 42. Since the second pipe section 42 is located close to the first refrigerant channel 21, the heat can continue to be transferred to the first refrigerant channel 21, thereby defrosting the first refrigerant channel 21. In this way, the heating terminal 64 is used to generate heat, and the heat from the first water tank 45 is used to defrost the first fluorine channel 21.

[0071] The foregoing description and accompanying drawings fully illustrate 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. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. 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 its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An air conditioning system with a defrosting circuit, characterized in that, include: The compressor (1) includes an exhaust port (11) and an intake port (12); The first heat exchanger (2) includes a first fluorine passage (21) and an air passage capable of exchanging heat with each other; The second heat exchanger (3) includes a second fluorine channel (31) and a water channel (32) that can exchange heat with each other; wherein, the exhaust port (11), the first fluorine channel (21), the second fluorine channel (31) and the suction port (12) of the compressor (1) are connected to form a refrigerant circulation loop; The hot water supply unit includes a first water tank (45) and a first water circulation loop (5) connected to a water channel (32), the first water circulation loop (5) being used to regulate the temperature of the first water tank (45); The heating and cooling unit includes a heating and cooling terminal (64) and a second water circulation loop (6) connected to a water channel (32). The second water circulation loop (6) is used to regulate the temperature of the heating and cooling terminal (64). The defrosting unit includes a defrosting circuit (4), which includes a first pipe section (41) and a second pipe section (42) connected to each other. The first pipe section (41) is located in the first water tank (45), and the second pipe section (42) is located near the first refrigerant channel (21). The heat from the first water tank (45) can be used to defrost the first refrigerant channel (21).

2. The air conditioning system with a defrosting circuit according to claim 1, characterized in that, The second section (42) is constructed as a serpentine or spiral pipe.

3. The air conditioning system with a defrosting circuit according to claim 1, characterized in that, The second pipe section (42) is installed on the outer surface of the first fluorine channel (21) by means of a bracket structure or a snap-fit ​​structure, and there is a gap between the second pipe section (42) and the first fluorine channel (21).

4. The air conditioning system with a defrosting circuit according to any one of claims 1 to 3, characterized in that, The defrosting circuit (4) is equipped with a first conduction valve (43) and a first water pump (44).

5. The air conditioning system with a defrosting circuit according to any one of claims 1 to 3, characterized in that, The first water circulation loop (5) includes: The first waterway (51) has its first end connected to the first end of the water channel (32) and its second end connected to the first water outlet (451) of the first water tank (45). A second guide valve (54) is provided on the first waterway (51). The second waterway (52) has its first end connected to the second end of the water channel (32) and its second end connected to the second water outlet (452) of the first water tank (45). A second water pump (55) is provided on the second waterway (52).

6. The air conditioning system with a defrosting circuit according to claim 5, characterized in that, The first water circulation loop (5) also includes: The third pipe section (53) is installed inside the first water tank (45), with its first end connected to the inside of the first water outlet (451) and its second end connected to the inside of the second water outlet (452). Furthermore, the second end of the first waterway (51) is connected to the outside of the first water outlet (451), and the second end of the second waterway (52) is connected to the outside of the second water outlet (452).

7. The air conditioning system with a defrosting circuit according to claim 5, characterized in that, The second water circulation loop (6) includes: The third water passage (61) has its first end connected to the first water passage (51) and located between the first end of the water channel (32) and the second control valve (54), and its second end connected to the first end of the heating and cooling terminal (64) through the third control valve (63); The fourth waterway (62) has its first end connected to the second waterway (52) and located between the second water pump (55) and the second water outlet (452), and its second end connected to the second end of the heating and cooling terminal (64).

8. The air conditioning system with a defrosting circuit according to claim 7, characterized in that, The air conditioning system includes: The cooling mode corresponds to: refrigerant flowing from the first refrigerant channel (21) to the second refrigerant channel (31), the first water pump (44) being off and the second water pump (55) being on, the second open valve (54) being off and the third open valve (63) being on; and / or, The heating mode corresponds to: the refrigerant flows from the second refrigerant channel (31) to the first refrigerant channel (21), the first water pump (44) is closed and the second water pump (55) is open, the second control valve (54) is closed and the third control valve (63) is open.

9. The air conditioning system with a defrosting circuit according to claim 7, characterized in that, The air conditioning system includes: The heating and hot water modes correspond to: refrigerant flowing from the second refrigerant channel (31) to the first refrigerant channel (21), the first water pump (44) being off and the second water pump (55) being on, and both the second and third open valves (54 and 63) being on; and / or, Hot water mode corresponds to: refrigerant flowing from the second refrigerant channel (31) to the first refrigerant channel (21), the first water pump (44) being closed and the second water pump (55) being open, the second control valve (54) being open and the third control valve (63) being closed.

10. The air conditioning system with a defrosting circuit according to claim 3, characterized in that, The air conditioning system includes: The first defrosting mode corresponds to: compressor (1) stopping, first water pump (44) starting, first ignition valve (43) opening; and / or, The second defrosting mode corresponds to: compressor (1) stopping, first water pump (44) shutting down and second water pump (55) starting up, second open valve (54) opening and third open valve (63) closing; and / or, The third defrosting mode corresponds to: the refrigerant flows from the second refrigerant channel (31) to the first refrigerant channel (21), the first water pump (44) is turned on and the second water pump (55) is turned on, the first open valve (43) is turned on and the third open valve (63) is turned on.

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