A multi-mode air conditioner

Abstract

The application discloses a multi-mode air conditioner, which comprises an outdoor unit, an indoor unit, a floor heating module and a heat exchange module, wherein the heat exchange module is connected with the floor heating module, and the heat exchange module comprises a heat exchanger and a second four-way valve, and the heat exchanger is internally provided with a refrigerant heat exchange cavity; the air conditioner is provided with the outdoor unit and the indoor unit, utilizes a compressor, a condenser and a first four-way valve in the air conditioner, cooperates with an evaporator and a throttle valve arranged in the indoor unit, and realizes the conventional refrigeration and heating functions of the air conditioner through the reversing of the first four-way valve; then, the floor heating module and the heat exchange module are arranged, the heat exchanger and the second four-way valve of the heat exchange module are utilized, a part of the refrigerant transported back and forth between the outdoor unit and the indoor unit is converted, the converted refrigerant is transported into the heat exchanger, the water in the heat exchange pipe is heat-exchanged, the heat-exchanged water is transported to the floor heating module for heating, the floor heating mode is switched to, and the switching of the multi-mode is realized, so that the structure of the outdoor unit and the indoor unit does not need to be changed.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a multi-mode air conditioner. Background Technology

[0002] As people's living standards improve, their demands for the comfort of their living environment are increasing. Especially in winter, traditional air conditioner indoor units blow out hot air with low density, which is difficult to sink, resulting in a hot top and cold bottom, making users feel uncomfortable. However, the Tianfu-water air conditioning system adds a floor heating hydraulic module. In winter, the air conditioner indoor unit is not needed. Only the floor heating hydraulic module is turned on. The hydraulic module heats the water in the floor heating coils. The heat radiated by the hot water under the floor can achieve "warm feet and cool ceiling" from bottom to top, improving user comfort.

[0003] A hydraulic module, including a heat exchanger, is part of an air conditioning system and is a device for heat exchange between water (the refrigerant) and the refrigerant. A hydraulic module mainly includes components such as a heat exchanger, water pump, expansion tank, temperature controller, safety valve, automatic water supply valve, and electrical control box. These components are installed inside the hydraulic module housing and connected via piping. A traditional hydraulic module is equivalent to an indoor unit of an air conditioner; its cooling and heating modes are typically controlled by the outdoor unit, which switches the refrigerant flow direction.

[0004] When using underfloor heating in winter, with the indoor unit of the air conditioner off, the high-temperature, high-pressure refrigerant gas inside the indoor unit easily condenses into liquid refrigerant. Excessive accumulation of liquid refrigerant in these indoor units can cause insufficient refrigerant circulation in the air conditioning system. To address this issue, the electronic expansion valve of the indoor unit is usually opened, allowing the liquid refrigerant to return to the outdoor unit. This can easily create a hissing sound from the liquid refrigerant flowing, causing inconvenience and even complaints from users.

[0005] Another issue is that in air conditioning systems equipped with hydraulic modules, the indoor temperature rises too slowly when the underfloor heating mode is activated in winter. Typically, the air conditioning needs to be turned on for heating first, and then gradually switched to underfloor heating mode. This involves the multi-mode operation switching control problem of the existing refrigerant-based water-based air conditioning system. Existing hydraulic modules usually lack the ability to control the direction of refrigerant flow, making it difficult for existing refrigerant-based water-based air conditioning systems to achieve multi-mode switching control. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a highly adaptable multi-mode air conditioner.

[0007] To achieve the above objectives, the present invention provides the following solution: a multi-mode air conditioner, comprising an outdoor unit, an indoor unit, a floor heating module, and a heat exchange module, wherein the heat exchange module is connected to the floor heating module, the heat exchange module includes a heat exchanger and a second four-way valve, the heat exchanger is provided with a refrigerant heat exchange chamber, the refrigerant heat exchange chamber is connected to the second four-way valve, the refrigerant heat exchange chamber is provided with a heat exchange pipe, the heat exchange pipe is connected to the floor heating module, and the heat exchange pipe is used to supply heat to the floor heating module; The outdoor unit includes a compressor, a condenser, and a first four-way valve. The first four-way valve is connected to the condenser, a second four-way valve, and the compressor. The condenser is connected to the refrigerant heat exchange chamber and the indoor unit.

[0008] The beneficial effects of this invention are as follows: It enables multi-mode switching. The air conditioner, by setting up an outdoor unit and an indoor unit, utilizes the compressor, condenser, and first four-way valve within them, along with the evaporator and throttling valve in the indoor unit. The switching of the first four-way valve enables the air conditioner to perform conventional cooling and heating functions. Then, by setting up a floor heating module and a heat exchange module, through the heat exchanger and second four-way valve in the heat exchange module, a portion of the refrigerant transported between the outdoor and indoor units is converted and transported to the heat exchanger to exchange heat with the water in the heat exchange tubes. The heat-exchanged water is then transported to the floor heating module for heating, thus achieving the switching to floor heating mode. This enables multi-module switching without modifying the structure of the outdoor and indoor units. The air conditioner has better adaptability and versatility, and refrigerant accumulation will not occur in various operating modes.

[0009] Furthermore, the indoor unit includes at least one evaporator, at least one second throttle valve, one second throttle valve connected in series with one evaporator, a second four-way valve connected to the evaporator, a second refrigerant pipe connected to the condenser, a second refrigerant pipe connected to multiple second throttle valves, and a refrigerant heat exchange chamber connected to the second refrigerant pipe.

[0010] Furthermore, the refrigerant heat exchange chamber is connected to a first refrigerant pipe, the first refrigerant pipe is connected to the middle of a second refrigerant pipe, and a third throttle valve is provided on the first refrigerant pipe.

[0011] Furthermore, the first four-way valve is provided with a C1 interface, a D1 interface, an E1 interface, and an S1 interface. The D1 interface and the S1 interface are respectively connected to the compressor, the C1 interface is connected to the condenser, and the E1 interface is connected to the second four-way valve.

[0012] Furthermore, a first throttle valve is connected between the condenser and the liquid valve.

[0013] Furthermore, the E1 interface is connected to a gas valve, the gas valve is connected to a second four-way valve, the condenser is connected to a liquid valve, and the liquid valve is connected to a second refrigerant pipe.

[0014] Furthermore, the second four-way valve is provided with a C2 interface, a D2 interface, an E2 interface, and an S2 interface. The C2 interface is connected to the refrigerant heat exchange chamber, the S2 interface is connected to a second one-way valve, the second one-way valve is connected to the first refrigerant pipe, the E2 interface is connected to the evaporator, the E2 interface is connected to a first one-way valve, and the first one-way valve and the D2 interface are respectively connected to a gas valve.

[0015] Furthermore, the S2 interface is connected to a capillary tube, and the first one-way valve, the capillary tube, and the D2 interface are respectively connected to an air valve.

[0016] Furthermore, the underfloor heating module includes a manifold and a collector. One end of the heat exchange pipe is connected to a first water supply pipe, and the other end of the heat exchange pipe is connected to a water pump. The water pump is connected to a second water supply pipe, which is connected to the collector. The first water supply pipe is connected to the manifold. A differential pressure valve is connected between the first and second water supply pipes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the connection structure according to Embodiment 1 of the present invention.

[0018] Figure 2 This is a schematic diagram of the connection structure in Embodiment 2 of the present invention. Figure 1 .

[0019] Figure 3 This is a schematic diagram of the connection structure in Embodiment 2 of the present invention. Figure 2 (Cooling mode).

[0020] Figure 4 This is a schematic diagram of the connection structure in Embodiment 2 of the present invention. Figure 3 (Heating mode).

[0021] Figure 5 This is a schematic diagram of the connection structure in Embodiment 2 of the present invention. Figure 4 (Underfloor heating mode).

[0022] In this system, 1 is the outdoor unit, 11 is the compressor, 12 is the condenser, 13 is the first four-way valve, 14 is the gas valve, 15 is the liquid valve, 16 is the first throttle valve, 2 is the indoor unit, 21 is the evaporator, 22 is the second throttle valve, 3 is the underfloor heating module, 31 is the water distributor, 32 is the water collector, 33 is the first water supply pipe, 34 is the second water supply pipe, 35 is the water pump, 36 is the differential pressure valve, 4 is the heat exchange module, 41 is the heat exchanger, 411 is the refrigerant heat exchange chamber, 412 is the heat exchange tube, 42 is the second four-way valve, 43 is the first refrigerant pipe, 44 is the second refrigerant pipe, 45 is the third throttle valve, 46 is the first one-way valve, 47 is the second one-way valve, and 48 is the capillary tube. Detailed Implementation

[0023] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Example 1:

[0025] See appendix Figure 1 As shown, a multi-mode air conditioner includes an outdoor unit 1, an indoor unit 2, a floor heating module 3, and a heat exchange module 4. The heat exchange module 4 is connected to the floor heating module 3. The heat exchange module 4 includes a heat exchanger 41 and a second four-way valve 42. The heat exchanger 41 is provided with a refrigerant heat exchange chamber 411, which is connected to the second four-way valve 42. The refrigerant heat exchange chamber 411 is provided with a heat exchange pipe 412, which is connected to the floor heating module 3 and is used to supply heat to the floor heating module 3.

[0026] The outdoor unit 1 includes a compressor 11, a condenser 12, and a first four-way valve 13. The first four-way valve 13 is connected to the condenser 12, a second four-way valve 42, and the compressor 11. The condenser 12 is connected to the refrigerant heat exchange chamber 411 and the indoor unit 2.

[0027] In this embodiment, the underfloor heating module 3 includes a water distributor 31 and a water collector 32. One end of the heat exchange pipe 412 is connected to a first water supply pipe 33, and the other end of the heat exchange pipe 412 is connected to a water pump 35. The water pump 35 is connected to a second water supply pipe 34, and the second water supply pipe 34 is connected to the water collector 32. The first water supply pipe 33 is connected to the water distributor 31. A differential pressure valve 36 is connected between the first water supply pipe 33 and the second water supply pipe 34.

[0028] In this embodiment, the indoor unit 2 includes at least one evaporator 21 and at least one second throttle valve 22. An evaporator 21 is connected in series with a second throttle valve 22. A second four-way valve 42 is connected to the evaporator 21. A condenser 12 is connected to a second refrigerant pipe 44. The second refrigerant pipe 44 is connected to multiple second throttle valves 22. A refrigerant heat exchange chamber 411 is connected to the second refrigerant pipe 44. A first refrigerant pipe 43 is connected to the refrigerant heat exchange chamber 411. The first refrigerant pipe 43 is connected to the middle part of the second refrigerant pipe 44. A third throttle valve 45 is provided on the first refrigerant pipe 43.

[0029] In this embodiment, the first four-way valve 13 is provided with a C1 interface, a D1 interface, an E1 interface, and an S1 interface. The D1 interface and the S1 interface are respectively connected to the compressor 11, the C1 interface is connected to the condenser 12, and the E1 interface is connected to the second four-way valve 42. A first throttle valve 16 is connected between the condenser 12 and the liquid valve 15.

[0030] In this embodiment, the E1 interface is connected to a gas valve 14, the gas valve 14 is connected to a second four-way valve 42, the condenser 12 is connected to a liquid valve 15, and the liquid valve 15 is connected to a second refrigerant pipe 44.

[0031] In this embodiment, the second four-way valve 42 is provided with a C2 interface, a D2 interface, an E2 interface, and an S2 interface. The C2 interface is connected to the refrigerant heat exchange chamber 411, the S2 interface is connected to the second one-way valve 47, the second one-way valve 47 is connected to the first refrigerant pipe 43, the E2 interface is connected to the evaporator 21, the E2 interface is connected to the first one-way valve 46, and the first one-way valve 46 and the D2 interface are respectively connected to the gas valve 14.

[0032] The heat exchanger 41, the second four-way valve 42, the first one-way valve 46, the second one-way valve 47, and the third throttle valve 45 form a refrigerant flow path switching structure. This allows for a change in the refrigerant flow direction within the heat exchange module 4, enabling switching between heating mode and floor heating mode. In heating mode, the refrigerant enters the indoor unit 3, and the high-temperature, high-pressure refrigerant gas does not enter the heat exchanger 41 of the heat exchange module 4 to naturally condense and liquefy. The small amount of low-pressure refrigerant flowing within the heat exchanger 41 can be drawn back to the outdoor unit 1. In floor heating mode, the refrigerant enters the heat exchanger 41 of the heat exchange module 4, and the high-temperature, high-pressure refrigerant gas does not enter the idle indoor unit 3 to naturally condense and liquefy. The small amount of low-pressure refrigerant flowing through the indoor unit 3 can be drawn back to the outdoor unit 1. Example 2:

[0033] See appendix Figure 2 To be continued Figure 5As shown, a multi-mode air conditioner includes an outdoor unit 1, an indoor unit 2, a floor heating module 3, and a heat exchange module 4. The heat exchange module 4 is connected to the floor heating module 3. The heat exchange module 4 includes a heat exchanger 41 and a second four-way valve 42. The heat exchanger 41 is provided with a refrigerant heat exchange chamber 411, which is connected to the second four-way valve 42. The refrigerant heat exchange chamber 411 is provided with a heat exchange pipe 412, which is connected to the floor heating module 3 and is used to supply heat to the floor heating module 3.

[0034] The outdoor unit 1 includes a compressor 11, a condenser 12, and a first four-way valve 13. The first four-way valve 13 is connected to the condenser 12, a second four-way valve 42, and the compressor 11. The condenser 12 is connected to the refrigerant heat exchange chamber 411 and the indoor unit 2.

[0035] In this embodiment, the underfloor heating module 3 includes a water distributor 31 and a water collector 32. One end of the heat exchange pipe 412 is connected to a first water supply pipe 33, and the other end of the heat exchange pipe 412 is connected to a water pump 35. The water pump 35 is connected to a second water supply pipe 34, and the second water supply pipe 34 is connected to the water collector 32. The first water supply pipe 33 is connected to the water distributor 31. A differential pressure valve 36 is connected between the first water supply pipe 33 and the second water supply pipe 34.

[0036] In this embodiment, the indoor unit 2 includes at least one evaporator 21 and at least one second throttle valve 22. An evaporator 21 is connected in series with a second throttle valve 22. A second four-way valve 42 is connected to the evaporator 21. A condenser 12 is connected to a second refrigerant pipe 44. The second refrigerant pipe 44 is connected to multiple second throttle valves 22. A refrigerant heat exchange chamber 411 is connected to the second refrigerant pipe 44. A first refrigerant pipe 43 is connected to the refrigerant heat exchange chamber 411. The first refrigerant pipe 43 is connected to the middle part of the second refrigerant pipe 44. A third throttle valve 45 is provided on the first refrigerant pipe 43.

[0037] In this embodiment, the first four-way valve 13 is provided with a C1 interface, a D1 interface, an E1 interface, and an S1 interface. The D1 interface and the S1 interface are respectively connected to the compressor 11, the C1 interface is connected to the condenser 12, and the E1 interface is connected to the second four-way valve 42. A first throttle valve 16 is connected between the condenser 12 and the liquid valve 15.

[0038] In this embodiment, the E1 interface is connected to a gas valve 14, the gas valve 14 is connected to a second four-way valve 42, the condenser 12 is connected to a liquid valve 15, and the liquid valve 15 is connected to a second refrigerant pipe 44.

[0039] In this embodiment, the second four-way valve 42 is provided with a C2 interface, a D2 interface, an E2 interface, and an S2 interface. The C2 interface is connected to the refrigerant heat exchange chamber 411, the S2 interface is connected to the second one-way valve 47, the second one-way valve 47 is connected to the first refrigerant pipe 43, the E2 interface is connected to the evaporator 21, the E2 interface is connected to the first one-way valve 46, the S2 interface is connected to the capillary tube 48, and the first one-way valve 46, the capillary tube 48, and the D2 interface are connected to the gas valve 14.

[0040] Cooling mode: such as Figure 3 As shown, at this time, neither the first four-way valve 13 nor the second four-way valve 42 is energized, so that the C1 port of the first four-way valve 13 is connected to the D1 port and the E1 port is connected to the S1 port. The second four-way valve 42 is not working, so that the C2 port of the second four-way valve 42 is connected to the D2 port and the E2 port is connected to the S2 port. The third throttle valve 45 is in a closed and non-flowing state. At this time, the refrigerant flow direction is mainly: compressor 11 → D1 port of the first four-way valve 13 → C1 port → condenser 12 → first throttle valve 16 → liquid valve 15 → second throttle valve 22 → evaporator 21 → first one-way valve 46 of heat exchange module 4 → gas valve 14 → E1 port of the first four-way valve 13 → S1 port → compressor 11; wherein, the heat exchanger 41 is in a low-pressure state, and the refrigerant in the refrigerant heat exchange chamber 411 absorbs heat from the water in the heat exchange tube 412 and slowly vaporizes and is drawn to the outdoor unit 1, thereby preventing refrigerant from accumulating in the refrigerant heat exchange chamber 411. Figure 3 The straight-line tail arrow indicates the main refrigerant flow direction, while the wavy-tail arrow indicates the flow of a small amount of gaseous or liquid refrigerant, used to solve the refrigerant accumulation problem. Low-pressure gaseous refrigerant is used to ensure the operational reliability of the second four-way valve 42.

[0041] Heating mode: such as Figure 4 As shown, at this time, both the first four-way valve 13 and the second four-way valve 42 are energized and reversed, so that the E1 port of the first four-way valve 13 is connected to the D1 port and the C1 port is connected to the S1 port, the E2 port of the second four-way valve 42 is connected to the D2 port and the C2 port is connected to the S2 port, and the third throttle valve 45 is in the open flow state. At this time, the refrigerant flow direction is mainly: compressor 11 → D1 port of the first four-way valve 13 → E1 port → gas valve 14 → D2 port of the second four-way valve 42 of the heat exchange module 4 → E2 port → evaporator 21 → second throttle valve 22 → liquid valve 15 → first throttle valve 16 → condenser 12 → C1 port of the first four-way valve 13 → S1 port → compressor 11; wherein, when the third throttle valve 45 is open, part of the high-temperature and high-pressure refrigerant gas is throttled and depressurized at the capillary tube 48, part of which flows through the second one-way valve 47 to the second refrigerant pipe 44 between the outdoor unit 1 and the indoor unit 2, and the other part first flows from the channel formed by the C2 port and the S2 port of the second four-way valve 42 to the refrigerant heat exchange chamber 411 of the heat exchanger 41, and then flows from the third throttle valve 45 to the second refrigerant pipe 44 between the outdoor unit 1 and the indoor unit 2, so that refrigerant does not accumulate in the heat exchanger 41. Figure 4 The straight-line tail arrow indicates the main refrigerant flow direction, while the wavy-tail arrow indicates the flow of a small amount of gaseous or liquid refrigerant, used to solve the refrigerant accumulation problem. Low-pressure gaseous refrigerant is used to ensure the operational reliability of the second four-way valve 42.

[0042] Underfloor heating mode: such as Figure 5 As shown, at this time, the first four-way valve 13 is energized and reverses, so that the D1 port of the first four-way valve 13 is connected to the E1 port and the C1 port is connected to the S1 port; the second four-way valve 42 is not energized and remains connected to the C2 port and the E2 port is connected to the S2 port; the third throttle valve 45 automatically adjusts and controls. At this time, the refrigerant flow direction is mainly: compressor 11 → D1 port of the first four-way valve 13 → E1 port → gas valve 14 → D2 port of the second four-way valve 42 of the heat exchange module 4 → C2 port → refrigerant heat exchange chamber 411 of the heat exchanger 41 → third throttle valve 45 → liquid valve 15 → first throttle valve 16 → condenser 12 → C1 port of the first four-way valve 13 → S1 port → compressor 11; among which, part of the high-temperature and high-pressure refrigerant gas is throttled and depressurized at the capillary tube 48, and part of it flows through the second one-way valve 47 to the second refrigerant pipe 44 between the outdoor unit 1 and the indoor unit 2, and the rest... A portion of the refrigerant flows through the channel formed by S2 and E2 of the second four-way valve 42 to the evaporator 21 of the indoor unit 2, and then through the second throttle valve 22 to the second refrigerant pipe 44 between the outdoor unit 1 and the indoor unit 2. This prevents refrigerant from accumulating on the evaporator 21 of the indoor unit 2, because at this time, low-pressure gas flows on the evaporator 21 of the indoor unit 2, so no liquid flow noise is generated. At the same time, the water in the heat exchange pipe 412 absorbs heat in the refrigerant heat exchange chamber 411 and is then transported to the water distributor 31, allowing the water distributor 31 to supply heat to the room. The water that has released heat is collected by the water collector 32 and transported back to the heat exchange pipe 412. Figure 5The straight-line tail arrow indicates the main refrigerant flow direction, while the wavy-tail arrow indicates the flow of a small amount of gaseous or liquid refrigerant, used to solve the problem of refrigerant accumulation. Low-pressure gaseous refrigerant is used to ensure the operational reliability of the electromagnetic second four-way valve 42.

[0043] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art can make more possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, all equivalent changes made based on the concept of the present invention without departing from the scope of the present invention should be covered within the protection scope of the present invention.

Claims

1. A multi-mode air conditioner, comprising an outdoor unit (1), an indoor unit (2), a floor heating module (3), and a heat exchange module (4), characterized in that: The heat exchange module (4) is connected to the floor heating module (3). The heat exchange module (4) includes a heat exchanger (41) and a second four-way valve (42). The heat exchanger (41) is provided with a refrigerant heat exchange chamber (411). The refrigerant heat exchange chamber (411) is connected to the second four-way valve (42). The refrigerant heat exchange chamber (411) is provided with a heat exchange tube (412). The heat exchange tube (412) is connected to the floor heating module (3). The heat exchange tube (412) is used to supply heat to the floor heating module (3). The outdoor unit (1) includes a compressor (11), a condenser (12), and a first four-way valve (13). The first four-way valve (13) is connected to the condenser (12), a second four-way valve (42), and the compressor (11). The condenser (12) is connected to the refrigerant heat exchange chamber (411) and the indoor unit (2).

2. A multi-mode air conditioner according to claim 1, characterized in that: The indoor unit (2) includes at least one evaporator (21) and at least one second throttle valve (22). One of the evaporators (21) is connected in series with one second throttle valve (22). The second four-way valve (42) is connected to the evaporator (21). The condenser (12) is connected to a second refrigerant pipe (44). The second refrigerant pipe (44) is connected to the second throttle valve (22). The refrigerant heat exchange chamber (411) is connected to the second refrigerant pipe (44).

3. A multi-mode air conditioner according to claim 2, characterized in that: The refrigerant heat exchange chamber (411) is connected to a first refrigerant pipe (43), the first refrigerant pipe (43) is connected to the middle of a second refrigerant pipe (44), and a third throttle valve (45) is provided on the first refrigerant pipe (43).

4. A multi-mode air conditioner according to claim 3, characterized in that: The first four-way valve (13) is provided with a C1 interface, a D1 interface, an E1 interface and an S1 interface. The D1 interface and the S1 interface are respectively connected to the compressor (11), the C1 interface is connected to the condenser (12), and the E1 interface is connected to the second four-way valve (42).

5. A multi-mode air conditioner according to claim 4, characterized in that: A first throttle valve (16) is connected between the condenser (12) and the liquid valve (15).

6. A multi-mode air conditioner according to claim 5, characterized in that: The E1 interface is connected to a gas valve (14), the gas valve (14) is connected to a second four-way valve (42), the condenser (12) is connected to a liquid valve (15), and the liquid valve (15) is connected to a second refrigerant pipe (44).

7. A multi-mode air conditioner according to claim 6, characterized in that: The second four-way valve (42) is provided with a C2 interface, a D2 interface, an E2 interface and an S2 interface. The C2 interface is connected to the refrigerant heat exchange chamber (411), the S2 interface is connected to a second one-way valve (47), the second one-way valve (47) is connected to the first refrigerant pipe (43), the E2 interface is connected to the evaporator (21), the E2 interface is connected to a first one-way valve (46), the first one-way valve (46) and the D2 interface are respectively connected to the gas valve (14).

8. A multi-mode air conditioner according to claim 7, characterized in that: The S2 interface is connected to a capillary tube (48), and the first one-way valve (46), the capillary tube (48), and the D2 interface are respectively connected to the air valve (14).

9. A multi-mode air conditioner according to claim 7 or 8, characterized in that: The floor heating module (3) includes a water distributor (31) and a water collector (32). One end of the heat exchange pipe (412) is connected to a first water supply pipe (33), and the other end of the heat exchange pipe (412) is connected to a water pump (35). The water pump (35) is connected to a second water supply pipe (34), and the second water supply pipe (34) is connected to the water collector (32). The first water supply pipe (33) is connected to the water distributor (31). A differential pressure valve (36) is connected between the first water supply pipe (33) and the second water supply pipe (34).

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