Outdoor unit and multifunctional water source multi-split air conditioning system

Abstract

The invention discloses an outdoor unit (1) and a multifunctional water source multi-split air conditioning system. The outdoor unit (1) comprises a compressor (10), a first plate heat exchanger (80), a second plate heat exchanger (90), a first four-way valve (20) and a second four-way valve (30). The first plate heat exchanger (80) comprises a first refrigerant flow channel (81) and a first water flow channel (82). The second plate heat exchanger (90) comprises a second refrigerant flow channel (91) and a second water flow channel (92), one of the second water flow channel (92) and the first water flow channel (82) is configured to be connected with the water system terminal equipment (2), and the other one of the second water flow channel (92) and the first water flow channel (82) is configured to be connected with a water source. The first four-way valve (20) is connected with a third air side stop valve (50), an air outlet (11) of the compressor (10), an air inlet (12) of the compressor (10) and one end of a second refrigerant flow channel (91), and the other end of the second refrigerant flow channel (91) is connected with a liquid side stop valve (60). The second four-way valve (30) is connected with an air outlet (11) of the compressor (10), an air inlet (12) of the compressor (10) and one end of the first refrigerant flow channel (81), and the other end of the first refrigerant flow channel (81) is connected with the liquid side stop valve (60).

Description

Outdoor unit and multi-function water source multi-split system

[0001] This application claims priority to Chinese patent application No. 202211254786.0 filed on October 13, 2022, and priority to Chinese patent application No. 202211253954.4 filed on October 13, 2022, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of air conditioning technology, and in particular to an outdoor unit and a multi-functional water source multi-split system. Background Art

[0003] The water source multi-split system (water source machine) combines water source heat pump technology with air source multi-split system. The cold and hot source side is the same as the water source heat pump system, using water as the energy transport medium, and the indoor side is the same as the multi-split system, using refrigerant as the energy transport medium.

[0004] Summary of the Invention

[0005] In one aspect, an outdoor unit is provided, comprising: a compressor, a first plate heat exchanger, a second plate heat exchanger, a first four-way valve, and a second four-way valve. The first plate heat exchanger includes a first refrigerant flow channel and a first water flow channel. The second plate heat exchanger includes a second refrigerant flow channel and a second water flow channel, one of the second water flow channel and the first water flow channel being configured to connect to a water system terminal device, and the other being configured to connect to a water source. The first four-way valve has a first port connected to a third gas-side shut-off valve, a second port connected to the compressor's air outlet, a third port connected to the compressor's air inlet, and a fourth port connected to one end of the second refrigerant flow channel. The other end of the second refrigerant flow channel is connected to the liquid-side shut-off valve via a second electronic expansion valve. The second four-way valve has a second port connected to the compressor's air outlet, a third port connected to the compressor's air inlet, and a fourth port connected to one end of the first refrigerant flow channel. The other end of the first refrigerant flow channel is connected to the liquid-side shut-off valve via the first electronic expansion valve.

[0006] On the other hand, a multifunctional water source multi-split system is provided, comprising a water system terminal device and an outdoor unit as described in any of the above embodiments, wherein the water system terminal device is connected to one of the first water flow channel and the second water flow channel of the outdoor unit.

[0007] On the other hand, an outdoor unit is provided, comprising: a compressor, a first plate heat exchanger, a second plate heat exchanger, a first four-way valve, a second four-way valve, and a third four-way valve. The first plate heat exchanger comprises a first refrigerant flow channel and a first water flow channel. The second plate heat exchanger comprises a second refrigerant flow channel and a second water flow channel, wherein one of the second water flow channel and the first water flow channel is configured to be connected to a water system terminal device, and the other is configured to be connected to a water source. The first four-way valve has a first port connected to the first gas-side shut-off valve, a second port connected to the air outlet of the compressor, and a third port connected to the air inlet of the compressor and connected to the second gas-side shut-off valve. The second four-way valve has a second port connected to the air outlet of the compressor, a third port connected to the air inlet of the compressor and connected to the second gas-side shut-off valve, and a fourth port connected to one end of the second refrigerant flow channel, the other end of which is connected to the liquid-side shut-off valve via a second expansion valve. A third four-way valve, whose second port is connected to the air outlet of the compressor, whose third port is connected to the air inlet of the compressor and connected to the second gas-side stop valve, whose fourth port is connected to one end of the first refrigerant flow channel, and the other end of the first refrigerant flow channel is connected to the liquid-side stop valve through the first expansion valve.

[0008] On the other hand, a multifunctional water source machine is provided, including a water system terminal device and an outdoor unit as described in any of the above embodiments, wherein the water system terminal device is connected to one of the first water flow channel and the second water flow channel of the outdoor unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG1 shows a schematic diagram of the structure of an outdoor unit of a related art multifunctional water source multi-split system;

[0010] FIG2 shows a schematic diagram of the structure of a multifunctional water source multi-connected system in related art;

[0011] FIG3 shows a schematic diagram of the structure of an outdoor unit of a water source multi-split system in some embodiments;

[0012] FIG4 shows a schematic structural diagram of a multi-connected water source system in some embodiments;

[0013] FIG5 is a schematic diagram showing the operating principle of a multi-split water source system in some embodiments when producing hot water independently;

[0014] FIG6 is a schematic diagram showing the operating principle of a water source multi-split system in some embodiments when the water is cooled alone;

[0015] FIG7 shows a schematic structural diagram of a water source multi-connected system in some other embodiments;

[0016] FIG8 is a schematic diagram showing the operating principle of a water source multi-connected system for producing hot water alone according to some other embodiments;

[0017] FIG9 shows a schematic diagram of the operating principle of a water source multi-split system in another embodiment when the water is cooled alone;

[0018] FIG10 is a schematic diagram showing the operating principle of a multi-split water system for cooling, heating, recycling and producing hot water in some other embodiments;

[0019] FIG11 shows a schematic diagram of the structure of an outdoor unit of a water source multi-split system in some other embodiments;

[0020] FIG12 shows a schematic diagram of the structure of a multi-connected water source system in some other embodiments;

[0021] FIG13 is a schematic diagram showing the operating principle of a water source multi-split system for producing hot water alone according to some other embodiments;

[0022] FIG14 shows a schematic diagram of the operating principle of a water source multi-split system in another embodiment when the water is cooled alone;

[0023] FIG15 shows a schematic diagram of the structure of a multi-connected water source system in some other embodiments;

[0024] FIG16 is a schematic diagram showing the operating principle of a water source multi-connected system for producing hot water alone according to some other embodiments;

[0025] FIG17 is a schematic diagram showing the operating principle of a water source multi-split system in another embodiment when the water is cooled alone;

[0026] FIG18 is a schematic diagram showing the operating principle of a multi-split water system for cooling and heat recovery hot water production in some other embodiments;

[0027] FIG19 is a schematic diagram showing another operating mode of a multi-split water source system for cooling and hot water production with heat recovery in some other embodiments;

[0028] FIG20 shows a schematic diagram of the operating principle of a water source multi-split system for heating and heat recovery hot water production in some other embodiments;

[0029] FIG21 is a schematic diagram showing the operating principle of a water source multi-split system for heating and heat recovery cooling water in some other embodiments;

[0030] FIG22 shows a schematic diagram showing another operating mode of a water source multi-split system for heating + heat recovery chilled water in some other embodiments. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, rather than all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0032] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0033] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0034] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0035] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0036] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0037] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0038] The air conditioner of the present application performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation to cool or heat the indoor space.

[0039] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into high-temperature, high-pressure refrigerant gas and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, releasing heat into the surrounding environment through the condensation process.

[0040] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser to a lower-pressure liquid. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves cooling by utilizing the latent heat of evaporation to exchange heat with the material being cooled. Throughout this cycle, the air conditioner regulates the temperature of the indoor space.

[0041] The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

[0042] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0043] A water-source VRF system (water-source unit) combines water-source heat pump technology with an air-source VRF system. Similar to water-source heat pump systems, the cooling and heating sources use water as the energy transport medium. Similar to VRF systems, the indoor cooling and heating sources use refrigerant as the energy transport medium. Water-source VRF systems typically use groundwater, surface water, or other sources.

[0044] FIG1 shows a schematic diagram of the structure of an outdoor unit of a related art multifunctional water source multi-split system; FIG2 shows a schematic diagram of the structure of a related art multifunctional water source multi-split system.

[0045] In the related art, the outdoor unit of a water source unit, as shown in FIG1 , is typically equipped with only an outdoor plate heat exchanger 1A, which serves as a water source side heat exchanger. One of the flow channels of the outdoor plate heat exchanger 1A is a refrigerant flow channel, and the other is a water flow channel. Heat exchange between the refrigerant and water is achieved in the outdoor plate heat exchanger 1A, thereby achieving the cooling / heating function of the air conditioner. The arrow in FIG1 indicates the direction of water flow. Referring to FIG2 , if the related art water source unit is to achieve other functions, such as producing cold / hot water, a separate indoor unit 2A is required. The indoor unit is equipped with an indoor plate heat exchanger 3A configured to exchange heat with the refrigerant to produce cold / hot water, and output the cold / hot water to the user. As shown in FIG1 , if the related art water source unit is to produce cold / hot water, the indoor unit 2A must be turned on, which requires that the user side must be equipped with the indoor unit 2A. This has high limitations in use and is not applicable to disclosures that do not include an indoor unit. The cost is high, and it cannot achieve heat recovery to produce hot water.

[0046] Based on this, the present application provides an outdoor unit and a water source multi-split system, which can solve the above-mentioned problems existing in the related art. The specific structure and working principle of the outdoor unit and the water source multi-split system of the present application are described in detail with specific embodiments below.

[0047] FIG3 shows a schematic diagram showing the structure of an outdoor unit of a water source multi-split system in some embodiments.

[0048] In some embodiments, as shown in FIG3 , the outdoor unit 1 includes a compressor 10 , a first plate heat exchanger 80 , a second plate heat exchanger 90 , a first four-way valve 20 , and a second four-way valve 30 , which are connected in a refrigerant flow order to form a circuit. The compressor 10 is provided with a compressor outlet 11 (also known as an exhaust port) and a compressor inlet 12 (also known as an intake port).

[0049] The first plate heat exchanger 80 includes a first refrigerant flow channel 81 and a first water flow channel 82 . The first refrigerant flow channel 81 is for the refrigerant to flow through, and the first water flow channel 82 is for the water to flow through.

[0050] The second plate heat exchanger 90 includes a second refrigerant flow channel 91 and a second water flow channel 92. The second refrigerant flow channel 91 is for the flow of refrigerant, and the second water flow channel 92 is for the flow of water. One of the second water flow channel 92 and the first water flow channel 82 is configured to connect to a water system terminal device 2, such as a water tank, floor heating water pipe, etc., and the other is configured to connect to a water source. In some embodiments, the first plate heat exchanger 80 is connected to the user side, that is, the first water flow channel 82 is connected to the water system terminal device 2, the water outlet of the first water flow channel 82 is connected to the water inlet of the water system terminal device 2, the water inlet of the first water flow channel 82 is connected to the water outlet of the water system terminal device 2, and the water inlet of the second water flow channel 92 is connected to the water outlet of the water source.

[0051] The first port 21 of the first four-way valve is connected to a third gas-side shut-off valve 50, the second port 22 of the first four-way valve is connected to the compressor air outlet 11, the third port 23 of the first four-way valve is connected to the compressor air inlet 12, the fourth port 24 of the first four-way valve is connected to one end of the second refrigerant flow channel 91, and the other end of the second refrigerant flow channel 91 is connected to a liquid-side shut-off valve 60 through the second expansion valve 70.

[0052] The second port 32 of the second four-way valve is connected to the compressor outlet 11, the third port 33 of the second four-way valve is connected to the compressor inlet 12, the fourth port 34 of the second four-way valve is connected to one end of the first refrigerant flow channel 81, and the other end of the first refrigerant flow channel 81 is also connected to the above-mentioned liquid side stop valve 60 through the first expansion valve 40.

[0053] By arranging the first plate heat exchanger 80 and the second plate heat exchanger 90, the first four-way valve 20 and the second four-way valve 30, the third gas-side stop valve 50 and the liquid-side stop valve 60 in the outdoor unit 1, it is possible to achieve independent hot water production and independent cooling water when the outdoor unit 1 is operating alone, without the need for the indoor unit to be operated or without the need to configure an indoor unit, thereby reducing the cost of independent cold water / hot water production; when the indoor unit is operating, air conditioning cooling and heating recovery to produce hot water can also be achieved, further enriching the functions of the multi-functional water source multi-split system, reducing system energy consumption, and improving ease of use.

[0054] In some embodiments, a first water pump 100 is provided on the first water flow channel 82 to provide driving force for the flow of water in the first water flow channel 82; a second water pump 110 is provided on the second water flow channel 92 to provide driving force for the flow of water in the second water flow channel 92. Specifically, the first water pump 100 is provided at the water inlet end of the first water flow channel 82, and the second water pump 110 is provided at the water inlet end of the second water flow channel 92.

[0055] In some embodiments, a first pipe 120 is connected between the first port 21 of the first four-way valve and the third port 23 of the first four-way valve, and a first capillary tube 130 is provided on the first pipe 120, that is, a section of the first capillary tube 130 is connected to the first pipe 120, so that when the indoor unit is not included and the third gas-side stop valve 50 and the liquid-side stop valve 60 are closed, the refrigerant in the first four-way valve 20 can always be in a flowing state, thereby preventing the liquid hammer phenomenon from occurring at the moment of reversing the first four-way valve 20, thereby The first four-way valve 20 can be protected; the first port 31 of the second four-way valve can be closed, or as shown in Figure 3, the first port 31 of the second four-way valve is connected to the third port 33 of the second four-way valve through a second pipeline 140, and a second capillary tube 150 is provided on the second pipeline 140, that is, a section of the second capillary tube 150 is connected to the second pipeline 140, so that the refrigerant in the second four-way valve 30 is always in a flowing state, preventing liquid hammer from occurring at the moment of reversing the second four-way valve 30, thereby protecting the second four-way valve 30.

[0056] In some embodiments, the compressor outlet 11 is connected to a third pipeline 160, and the third pipeline 160 is connected to the first four-way valve second port 22 and the second four-way valve second port 32 through a three-way piece, so that the first four-way valve second port 22 and the second four-way valve second port 32 are connected to the compressor outlet 11 at the same time.

[0057] FIG4 shows a schematic diagram of the structure of a water source multi-split system in some embodiments. As shown in FIG4 , in some embodiments, a multifunctional water source multi-split system is further provided, comprising a water system terminal device 2, which may be a water tank, a floor heating water pipe, etc., and an outdoor unit 1 as described in some embodiments. The water system terminal device 2 is connected to one of the first water flow channel 82 and the second water flow channel 92 of the outdoor unit 1, and the other of the first water flow channel 82 and the second water flow channel 92 is connected to a water source. In some embodiments, the first plate heat exchanger 80 is connected to the user side, i.e., the first water flow channel 82 is connected to the water system terminal device 2, the water outlet of the first water flow channel 82 is connected to the water inlet of the water system terminal device 2, the water inlet of the first water flow channel 82 is connected to the water outlet of the water system terminal device 2, and the water inlet of the second water flow channel 92 is connected to the water outlet of the water source.

[0058] In some embodiments, the multifunctional water source multi-split system includes the following operating modes: a separate hot water mode and a separate cooling water mode.

[0059] FIG5 shows a schematic diagram of the operating principle of a water source multi-split system when hot water is produced independently in some embodiments. As shown in FIG5 , the water source multi-split system does not include an indoor unit, and the specific operation of the independent hot water production mode is as follows: the third gas side stop valve 50 and the liquid side stop valve 60 are both closed. Although there is refrigerant in the pipeline where they are located, the refrigerant does not flow. The first expansion valve 40 is fully opened, the second expansion valve 70 is throttled, the first plate heat exchanger 80 acts as a condenser, and the second plate heat exchanger 90 acts as an evaporator; the third port 23 of the first four-way valve is connected to the fourth port 24 of the first four-way valve, and the first port 21 of the first four-way valve is connected. It is connected to the second port 22 of the first four-way valve, the second port 32 of the second four-way valve and the fourth port 34 of the second four-way valve, and the first port 31 of the second four-way valve and the third port 33 of the second four-way valve. The high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11 and flows through the second four-way valve 30 and the first plate heat exchanger 80 in sequence to become a high-pressure medium-temperature liquid refrigerant, and then passes through the first expansion valve 40, the second expansion valve 70 and the second plate heat exchanger 90 to become a low-pressure and low-temperature gaseous refrigerant, and finally flows through the first four-way valve 20 and flows back to the compressor 10 through the compressor inlet 12.

[0060] FIG6 shows a schematic diagram of the operating principle of the water source multi-split system when the water is cooled alone in some embodiments. As shown in FIG6 , at this time, the water source multi-split system does not include the indoor unit, and the specific operation of the single cooling water mode is as follows: the third gas side stop valve 50 and the liquid side stop valve 60 are both closed, and even if there is refrigerant in the pipeline where they are located, the refrigerant does not flow, the first expansion valve 40 is throttled, the second expansion valve 70 is fully opened, the first plate heat exchanger 80 acts as an evaporator, and the second plate heat exchanger 90 acts as a condenser; the second port 22 of the first four-way valve and the fourth port of the first four-way valve are connected. The first port 24 of the first four-way valve is connected, the first port 21 of the first four-way valve is connected to the third port 23 of the first four-way valve, the third port 33 of the second four-way valve is connected to the fourth port 34 of the second four-way valve, and the first port 31 of the second four-way valve is connected to the second port 32 of the second four-way valve. The high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11 and flows through the first four-way valve 20, the second plate heat exchanger 90, the second expansion valve 70, the first expansion valve 40, the first plate heat exchanger 80, and the second four-way valve 30 in sequence, and then flows back to the compressor 10 through the compressor inlet 12. In some embodiments, the outdoor unit and water source multi-split system can realize independent cooling water and independent hot water production functions.

[0061] In some embodiments, the first water flow channel 82 is still connected to the water system terminal device 2, and the second water flow channel 92 is still connected to the water source.

[0062] Figure 7 shows a structural schematic diagram of a water source multi-split system in some other embodiments. As shown in Figure 7, in some embodiments, the multifunctional water source multi-split system further includes an indoor unit 3, specifically two indoor units 3, each indoor unit 3 is provided with an indoor heat exchanger 3-1, one port of the indoor heat exchanger 3-1 is connected to the third gas side stop valve 50 of the outdoor unit 1, and the other port of the indoor heat exchanger 3-1 is connected to the liquid side stop valve 60 of the outdoor unit 1 through a throttling device 3-2 (specifically also an electronic expansion valve).

[0063] FIG8 shows a schematic diagram of the operating principle of a water source multi-split system in another embodiment when hot water is produced independently. As shown in FIG8 , the indoor unit 3 is not started, the third gas-side stop valve 50 and the liquid-side stop valve 60 can be kept open. Since the indoor unit 3 is not started, the refrigerant does not flow in the indoor heat exchanger 3-1 or flows very slowly; the first expansion valve 40 is fully opened, the second expansion valve 70 is throttled, the first plate heat exchanger 80 acts as a condenser, and the second plate heat exchanger 90 acts as an evaporator; the third port 23 of the first four-way valve is connected to the fourth port 24 of the first four-way valve, and the first port 21 of the first four-way valve is connected to the fourth port 25 of the first four-way valve. The second port 22 of the first four-way valve is connected, the second port 32 of the second four-way valve is connected to the fourth port 34 of the second four-way valve, and the first port 31 of the second four-way valve is connected to the third port 33 of the second four-way valve. The high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11 and flows through the second four-way valve 30 and the first plate heat exchanger 80 in sequence to become a high-pressure medium-temperature liquid refrigerant. It is then throttled by the first expansion valve 40 and the second expansion valve 70 and flows through the second plate heat exchanger 90 to become a low-pressure and low-temperature gaseous refrigerant. Finally, it flows through the first four-way valve 20 and flows back to the compressor 10 through the compressor inlet 12.

[0064] FIG9 shows a schematic diagram of the operating principle of the water source multi-split system in another embodiment when the water is cooled alone. As shown in FIG9 , the indoor unit 3 is not started, the third gas side stop valve 50 and the liquid side stop valve 60 can be kept open. Since the indoor unit 3 is not started, the refrigerant does not flow in the indoor heat exchanger 3-1 or the flow rate is very slow. The specific operation of the single cooling water mode is as follows: the first expansion valve 40 is throttled, the second expansion valve 70 is fully opened, the first plate heat exchanger 80 is used as an evaporator, and the second plate heat exchanger 90 is used as a condenser; the second port 22 of the first four-way valve and the first four-way valve are connected. The fourth port 24 of the four-way valve is connected, the first port 21 of the first four-way valve and the third port 23 of the first four-way valve are connected, the third port 33 of the second four-way valve and the fourth port 34 of the second four-way valve are connected, and the first port 31 of the second four-way valve and the second port 32 of the second four-way valve are connected. The high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11 and flows through the first four-way valve 20, the second plate heat exchanger 90, the second expansion valve 70, the first expansion valve 40, the first plate heat exchanger 80, and the second four-way valve 30 in sequence, and then flows back to the compressor 10 through the air inlet of the compressor 10.

[0065] In some embodiments, the water source multi-split system can also realize the cooling, heating, recovery and hot water making function. FIG10 shows a schematic diagram of the operating principle of the water source multi-split system in other embodiments when cooling, heating, recovery and hot water making. As shown in FIG10 , the cooling + hot water making mode specifically operates as follows: the indoor unit 3 is in cooling operation, the throttling device 3-2 is in the throttling state, the third gas side stop valve 50 and the liquid side stop valve 60 are open, the first expansion valve 40 is fully open, the second expansion valve 70 is fully open, the first plate heat exchanger 80 and the second plate heat exchanger 90 both act as condensers; the second port 22 of the first four-way valve is connected to the fourth port 24 of the first four-way valve, the first port 21 of the first four-way valve is connected to the third port 23 of the first four-way valve, the second port 32 of the second four-way valve is connected to the fourth port 34 of the second four-way valve, the first port 31 of the second four-way valve is connected to the third port 33 of the second four-way valve, and the high-temperature and high-pressure gaseous refrigerant is discharged from the pressure The output from the compressor outlet 11 is divided into two paths, flowing through the first four-way valve 20 and the second four-way valve 30, respectively. The refrigerant flowing through the first four-way valve 20 then flows through the second plate heat exchanger 90, the second expansion valve 70, the liquid-side stop valve 60, and the throttling device 3-2 of the indoor unit 3, entering the indoor heat exchanger 3-1, and then flows back to the compressor 10 through the third gas-side stop valve 50 and the first four-way valve 20. At the same time, the refrigerant flowing through the second four-way valve 30 then flows through the first plate heat exchanger 80, the first expansion valve 40, the liquid-side stop valve 60, and the throttling device 3-2 of the indoor unit 3, entering the indoor heat exchanger 3-1, and then flows back to the compressor 10 through the third gas-side stop valve 50 and the first four-way valve 20. In some embodiments, the outdoor unit and water source multi-split system can realize independent cooling water, independent hot water production functions, and cooling and heating recovery hot water production functions.

[0066] Figure 11 shows a schematic diagram of the structure of the outdoor unit of the water source multi-split system according to some other embodiments. As shown in Figure 11, the outdoor unit 1 includes a compressor 10, a first plate heat exchanger 80, a second plate heat exchanger 90, a first four-way valve 20, a second four-way valve 30, and a third four-way valve 170, which are connected in the order of refrigerant flow to form a loop.

[0067] The compressor 10 is provided with a compressor air outlet 11 (also called an exhaust port) and a compressor air inlet 12 (also called an air intake port).

[0068] The first plate heat exchanger 80 includes a first refrigerant flow channel 81 and a first water flow channel 82 . The first refrigerant flow channel 81 is for the refrigerant to flow through, and the first water flow channel 82 is for the water to flow through.

[0069] The second plate heat exchanger 90 includes a second refrigerant flow channel 91 and a second water flow channel 92. The second refrigerant flow channel 91 is used for refrigerant to flow through, and the second water flow channel 92 is used for water to flow through; one of the second water flow channel 92 and the first water flow channel 82 is used to connect to the water system terminal equipment 2, such as a water tank, floor heating water pipe, etc., and the other is configured to connect to the water source. In this embodiment, the first plate heat exchanger 80 is connected to the user side, that is, the first water flow channel 82 is connected to the water system terminal equipment 2, the water outlet end of the first water flow channel 82 is connected to the water inlet end of the water system terminal equipment 2, the water inlet end of the first water flow channel 82 is connected to the water outlet end of the water system terminal equipment 2, and the water inlet end of the second water flow channel 92 is connected to the water outlet end of the water source.

[0070] The first port 21 of the first four-way valve is connected to a first gas-side stop valve 51 , the second port 22 of the first four-way valve is connected to the compressor outlet 11 , and the third port 23 of the first four-way valve is connected to the compressor inlet 12 and the second gas-side stop valve 52 .

[0071] The second port 32 of the second four-way valve is connected to the compressor outlet 11, the third port 33 of the second four-way valve is connected to the compressor inlet 12 and connected to the second gas side stop valve 52, the fourth port 34 of the second four-way valve is connected to one end of the second refrigerant flow channel 91, and the other end of the second refrigerant flow channel 91 is also connected to the above-mentioned liquid side stop valve 60 through the second expansion valve 70.

[0072] The second port 172 of the third four-way valve is connected to the compressor outlet 11, the third port 173 of the third four-way valve is connected to the compressor inlet and connected to the second gas side stop valve 52, the fourth port 174 of the third four-way valve is connected to one end of the first refrigerant flow channel 81, and the other end of the first refrigerant flow channel 81 is connected to the liquid side stop valve 60 through the first expansion valve 40.

[0073] By arranging the first plate heat exchanger 80 and the second plate heat exchanger 90, the first four-way valve 20, the second four-way valve 30 and the third four-way valve 170, the first gas side stop valve 51 and the second gas side stop valve 52 and the liquid side stop valve 60 in the outdoor unit 1, it is possible to independently produce hot water and independently cool water when the outdoor unit 1 is running, without the need for the indoor unit to be running or without the need to configure the indoor unit, thereby reducing the cost of independently producing hot and cold water; when the indoor unit is running, air conditioning cooling + heat recovery hot water production, air conditioning heating + heat recovery hot water production, air conditioning heating + heat recovery cooling water can also be achieved, further enriching the functions of the multi-functional water source machine, reducing system energy consumption, and improving ease of use.

[0074] In some embodiments, a first water pump 100 is provided on the first water flow channel 82 to provide driving force for the flow of water in the first water flow channel 82; a second water pump 110 is provided on the second water flow channel 92 to provide driving force for the flow of water in the second water flow channel 92. Specifically, in this embodiment, the first water pump 100 is provided at the water inlet end of the first water flow channel 82, and the second water pump 110 is provided at the water inlet end of the second water flow channel 92.

[0075] The fourth port 24 of the first four-way valve can be closed, or as shown in Figure 2, in this embodiment, a first pipeline 120 is connected between the fourth port 24 of the first four-way valve and the third port 23 of the first four-way valve, and a first capillary tube 130 is provided on the first pipeline 120, that is, a section of the first capillary tube 130 is connected to the first pipeline 120, so that when the indoor unit is not included or the indoor unit is not started, or when the third gas side stop valve 50 and the liquid side stop valve 60 are closed, the refrigerant in the first four-way valve 20 can also be in a flowing state at all times, preventing liquid hammer from occurring at the moment of reversing the first four-way valve 20, thereby protecting the first four-way valve 20.

[0076] Similarly, the first port 31 of the second four-way valve can be closed, or as shown in Figure 11, the first port 31 of the second four-way valve is connected to the third port 33 of the second four-way valve through a second pipeline 140, and a second capillary tube 150 is provided on the second pipeline 140, that is, a section of the second capillary tube 150 is connected to the second pipeline 140, so that the refrigerant in the second four-way valve 30 is always in a flowing state, preventing liquid hammer from occurring at the moment of reversing the second four-way valve 30, thereby protecting the second four-way valve 30.

[0077] Similarly, the first port 171 of the third four-way valve can be closed, or as shown in Figure 12, a fifth pipeline 180 is connected between the first port 171 of the third four-way valve and the third port 173 of the third four-way valve, and a third capillary tube 190 is provided on the fifth pipeline 180, so that the refrigerant in the third four-way valve 170 is always in a flowing state, preventing liquid hammer from occurring at the moment of reversing the third four-way valve 170, thereby protecting the third four-way valve 170.

[0078] In some embodiments, the compressor outlet 11 is connected to a fourth pipeline 161 , and the first four-way valve second port 22 , the second four-way valve second port 32 and the third four-way valve second port 172 are connected in parallel to the fourth pipeline 161 , thereby simultaneously connecting the compressor outlet 11 .

[0079] Similarly, the compressor air inlet 12 is connected to the sixth pipeline 200 , and the first four-way valve third port 23 , the second four-way valve third port 33 and the third four-way valve third port 173 are connected in parallel to the sixth pipeline 200 .

[0080] Figure 12 shows a structural schematic diagram of a water source multi-split system in some other embodiments. As shown in Figure 12, some embodiments further provide a multifunctional water source machine, including a water system terminal device 2, which can be a water tank, a floor heating water pipe, etc., and also includes the outdoor unit 1 described in this embodiment. The water system terminal device 2 is connected to one of the first water flow channel 82 and the second water flow channel 92 of the outdoor unit 1, and the other of the first water flow channel 82 and the second water flow channel 92 is connected to the water source. In this embodiment, the first plate heat exchanger 80 is connected to the user side, that is, the first water flow channel 82 is connected to the water system terminal device 2, the water outlet end of the first water flow channel 82 is connected to the water inlet end of the water system terminal device 2, the water inlet end of the first water flow channel 82 is connected to the water outlet end of the water system terminal device 2, and the water inlet end of the second water flow channel 92 is connected to the water outlet end of the water source.

[0081] FIG13 shows a schematic diagram of the operating principle of the water source multi-split system when hot water is produced independently in some other embodiments. As shown in FIG13 , the water source multi-split system does not include the indoor unit at this time, and the specific operation of the independent hot water production mode is as follows: the first gas side stop valve 51, the second gas side stop valve 52 and the liquid side stop valve 60 are all closed. Although there is refrigerant in the pipeline where they are located, the refrigerant does not flow. The first expansion valve 40 is fully opened, the second expansion valve 70 is throttled, the first plate heat exchanger 80 acts as a condenser, and the second plate heat exchanger 90 acts as an evaporator; the first port 21 of the first four-way valve is connected to the third port 23 of the first four-way valve, and the second port 22 of the first four-way valve is connected to the first four-way valve. The fourth port 24 of the four-way valve is connected, the first port 31 of the second four-way valve and the second port 32 of the second four-way valve are connected, the third port 33 of the second four-way valve and the fourth port 34 of the second four-way valve are connected, the second port 172 of the third four-way valve and the fourth port 174 of the third four-way valve are connected, the first port 171 of the third four-way valve and the third port 173 of the third four-way valve are connected, and the high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11 and flows through the third four-way valve 170, the first plate heat exchanger 80, the first expansion valve 40, the second expansion valve 70, the second plate heat exchanger 90, and the second four-way valve 30, and then flows back to the compressor 10 through the compressor inlet 12.

[0082] FIG14 shows a schematic diagram of the operating principle of the water source multi-split system when chilling water alone in some other embodiments. As shown in FIG14 , at this time, the water source multi-split system does not include the indoor unit, and the specific operation of the single chilled water mode is as follows: the first gas side stop valve 51, the second gas side stop valve 52 and the liquid side stop valve 60 are all closed, and even if there is refrigerant in the pipeline where they are located, the refrigerant does not flow, the first expansion valve 40 is throttled, the second expansion valve 70 is fully opened, the first plate heat exchanger 80 serves as an evaporator, and the second plate heat exchanger 90 serves as a condenser; the first port 21 of the first four-way valve is connected to the third port 23 of the first four-way valve, and the second port 22 of the first four-way valve is connected to the first four-way valve. The fourth port 24 of the valve is connected, the first port 31 of the second four-way valve is connected to the third port 33 of the second four-way valve, the second port 32 of the second four-way valve is connected, the first port 171 of the third four-way valve is connected to the second port 172 of the third four-way valve, and the third port 173 of the third four-way valve is connected to the fourth port 174 of the third four-way valve. The high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11, flows through the second four-way valve 30, the second plate heat exchanger 90, the second expansion valve 70, the first expansion valve 40, the first plate heat exchanger 80, and the third four-way valve 170, and then flows back to the compressor 10 through the compressor inlet 12. In this embodiment, the outdoor unit and water source multi-split system can realize independent cooling water and independent hot water production functions.

[0083] Figure 15 shows a schematic diagram of the structure of a water source multi-split system in some other embodiments. As shown in Figure 5, in addition to the outdoor unit 1 and the water system terminal device 2 described in the first embodiment, the multifunctional water source machine in this embodiment also includes an indoor unit 3, specifically two indoor units 3, each indoor unit 3 is provided with an indoor heat exchanger 3-1, one port of the indoor heat exchanger 3-1 is connected to the first gas side stop valve 51 of the outdoor unit 1, and the other port of the indoor heat exchanger 3-1 is connected to the liquid side stop valve 60 of the outdoor unit 1 through the throttling device 3-2 (specifically also an expansion valve).

[0084] FIG16 shows a schematic diagram of the operating principle of the water source multi-split system when hot water is produced independently in some other embodiments. As shown in FIG16 , the indoor unit 3 is not started, the first gas side stop valve 51 and the liquid side stop valve 60 can be kept open, and the second gas side stop valve 52 is closed. Since the indoor unit 3 is not started, the refrigerant does not flow in the indoor heat exchanger 3-1 or the flow rate is very slow; the specific operation of the independent hot water production mode is as follows: the first expansion valve 40 is fully opened, the second expansion valve 70 is throttled, the first plate heat exchanger 80 acts as a condenser, and the second plate heat exchanger 90 acts as an evaporator; the first port 21 of the first four-way valve is connected to the third port 23 of the first four-way valve, and the second port 23 of the first four-way valve is connected. 22 is connected to the fourth port 24 of the first four-way valve, the first port 31 of the second four-way valve is connected to the second port 32 of the second four-way valve, the third port 33 of the second four-way valve is connected to the fourth port 34 of the second four-way valve, the second port 172 of the third four-way valve is connected to the fourth port 174 of the third four-way valve, the first port 171 of the third four-way valve is connected to the third port 173 of the third four-way valve, and the high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11 and flows through the third four-way valve 170, the first plate heat exchanger 80, the first expansion valve 40, the second expansion valve 70, the second plate heat exchanger 90, and the second four-way valve 30, and then flows back to the compressor 10 through the compressor inlet 12.

[0085] FIG17 shows a schematic diagram of the operating principle of the water source multi-split system in another embodiment when the water is cooled alone. As shown in FIG17 , the indoor unit 3 is not started, the first gas side stop valve 51 and the liquid side stop valve 60 can be kept open, and the second gas side stop valve 52 is closed. Since the indoor unit 3 is not started, the refrigerant does not flow in the indoor heat exchanger 3-1 or the flow rate is very slow; the specific operation of the single cooling water mode is as follows: the first expansion valve 40 is throttled, the second expansion valve 70 is fully opened, the first plate heat exchanger 80 serves as an evaporator, and the second plate heat exchanger 90 serves as a condenser; the first port 21 of the first four-way valve is connected to the third port 23 of the first four-way valve, and the second port 23 of the first four-way valve is connected. 22 is connected to the fourth port 24 of the first four-way valve, the first port 31 of the second four-way valve is connected to the third port 33 of the second four-way valve, the second port 32 of the second four-way valve is connected to the fourth port 34 of the second four-way valve, the first port 171 of the third four-way valve is connected to the second port 172 of the third four-way valve, the third port 173 of the third four-way valve is connected to the fourth port 174 of the third four-way valve, and the high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11 and flows through the second four-way valve 30, the second plate heat exchanger 90, the second expansion valve 70, the first expansion valve 40, the first plate heat exchanger 80, and the third four-way valve 170, and then flows back to the compressor 10 through the compressor inlet 12.

[0086] Different from the first embodiment, the water source multi-split system in this embodiment can also realize the functions of cooling + heat recovery hot water making, heating + heat recovery hot water making, and heating + heat recovery chilled water, that is, it also includes the working modes of cooling + heat recovery hot water making mode, heating + heat recovery hot water making mode, and heating + heat recovery chilled water mode.

[0087] FIG18 shows a schematic diagram of the operating principle of the water source multi-split system in other embodiments when cooling + heat recovery is used for hot water production. As shown in FIG18 , at this time, the indoor heat load is small and the user side water consumption is large. The specific operation of the cooling + hot water production mode is as follows: the indoor unit 3 is in cooling operation, the first gas side stop valve 51 and the liquid side stop valve 60 are opened, the second gas side stop valve 52 is closed, the first expansion valve 40 is fully opened, the second expansion valve 70 is throttled, the first plate heat exchanger 80 acts as a condenser, and the second plate heat exchanger 90 acts as an evaporator; the first port 21 of the first four-way valve is connected to the third port 23 of the first four-way valve, the second port 22 of the first four-way valve is connected to the fourth port 24 of the first four-way valve, the first port 31 of the second four-way valve is connected to the second port 32 of the second four-way valve, and the third port 33 of the second four-way valve and the fourth port 34 of the second four-way valve are connected. The third four-way valve is connected to the indoor heat exchanger 3-1 through the second port 172 and the fourth port 174, and the third four-way valve is connected to the first port 171 and the third four-way valve. The high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11, passes through the third four-way valve 170, the first plate heat exchanger 80, the first expansion valve 40, the second expansion valve 70, the second plate heat exchanger 90, and the second four-way valve 30, and then flows back to the compressor 10 through the compressor inlet 12; at the same time, the refrigerant after flowing through the first expansion valve 40 also enters the indoor heat exchanger 3-1 through the liquid side stop valve 60 and the throttling device 3-2, and then flows back to the compressor 10 through the first gas side stop valve 51 and the first four-way valve 20.

[0088] FIG19 shows a schematic diagram of another operating mode of a water source multi-split system for cooling + heat recovery hot water production in some other embodiments. As shown in FIG19 , at this time, the indoor heat load is equivalent to the user-side water consumption, and the cooling + hot water production mode specifically operates as follows: the indoor unit 3 operates in cooling mode, the first gas-side stop valve 51 and the liquid-side stop valve 60 are open, the second gas-side stop valve 52 is closed, the first expansion valve 40 is fully open, the second expansion valve 70 is closed, the first port 21 of the first four-way valve is connected to the third port 23 of the first four-way valve, the second port 22 of the first four-way valve is connected to the fourth port 24 of the first four-way valve, the first port 31 of the second four-way valve is connected to the third port 33 of the second four-way valve, and the second port 32 of the second four-way valve is connected to the fourth port 24 of the first four-way valve. The second port 32 of the four-way valve is connected to the fourth port 34 of the second four-way valve, the second port 172 of the third four-way valve is connected to the fourth port 174 of the third four-way valve, and the first port 171 of the third four-way valve is connected to the third port 173 of the third four-way valve. The high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11 through the third four-way valve 170, the first plate heat exchanger 80, the first expansion valve 40, the liquid side stop valve 60, and the throttling device 3-2 into the indoor heat exchanger 3-1, and then flows back to the compressor 10 through the first gas side stop valve 51 and the first four-way valve 20.

[0089] FIG20 shows a schematic diagram of the operating principle of a water source multi-split system in heating and hot water production in some other embodiments. As shown in FIG20 , the specific operation of heating and hot water production is as follows: the indoor unit 3 is in heating operation, the throttling device 3-2 is fully open, the first gas side stop valve 51 and the liquid side stop valve 60 are open, the second gas side stop valve 52 is closed, the first expansion valve 40 is fully open, the second expansion valve 70 is throttled, the first plate heat exchanger 80 acts as a condenser, and the second plate heat exchanger 90 acts as an evaporator; the first port 21 of the first four-way valve is connected to the second port 22 of the first four-way valve, the third port 23 of the first four-way valve is connected to the fourth port 24 of the first four-way valve, the first port 31 of the second four-way valve is connected to the second port 32 of the second four-way valve, the third port 33 of the second four-way valve is connected to the fourth port 34 of the second four-way valve, and the first port 171 of the third four-way valve is connected to the third port 172 of the third four-way valve. 173 is connected, the second port 172 of the third four-way valve is connected to the fourth port 174 of the third four-way valve, and the high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11, passes through the third four-way valve 170, the first plate heat exchanger 80, the first expansion valve 40, the second expansion valve 70, the second plate heat exchanger 90, and the second four-way valve 30, and then flows back to the compressor 10 through the compressor inlet 12; at the same time, the high-temperature and high-pressure gaseous refrigerant output from the compressor outlet 11 also flows through the first four-way valve 20 and the first gas side stop valve 51 into the indoor heat exchanger 3-1, and then passes through the throttling device 3-2, the liquid side stop valve 60, the second expansion valve 70, the second plate heat exchanger 90, and the second four-way valve 30 in sequence, and then flows back to the compressor 10 through the compressor inlet 12.

[0090] FIG21 shows a schematic diagram of the operating principle of a water-source multi-split system in heating and cooling water in some other embodiments. As shown in FIG21 , the specific operation of heating and cooling water is as follows: the indoor unit 3 is in heating operation, the first gas-side stop valve 51 and the liquid-side stop valve 60 are open, the second gas-side stop valve 52 is closed, the first expansion valve 40 is throttled, the second expansion valve 70 is throttled, the first plate heat exchanger 80 and the second plate heat exchanger 90 both serve as evaporators; the first port 21 of the first four-way valve is connected to the second port 22 of the first four-way valve, the third port 23 of the first four-way valve is connected to the fourth port 24 of the first four-way valve, the first port 31 of the second four-way valve is connected to the second port 32 of the second four-way valve, the third port 33 of the second four-way valve is connected to the fourth port 34 of the second four-way valve, and the first port 17 of the third four-way valve is connected to the fourth port 17 of the third four-way valve. 1 is connected to the second port 172 of the third four-way valve, and the third port 173 of the third four-way valve is connected to the fourth port 174 of the third four-way valve. The high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11, passes through the first four-way valve 20, the first gas-side stop valve 51, enters the indoor heat exchanger 3-1, and then flows back to the compressor 10 through the throttling device 3-2, the liquid-side stop valve 60, the first expansion valve 40, the first plate heat exchanger 80, the third four-way valve 170, and the compressor air inlet 12. At the same time, the refrigerant flowing out of the liquid-side stop valve 60 also flows through the second expansion valve 70, the second plate heat exchanger 90, the second four-way valve 30, and then flows back to the compressor 10 through the compressor air inlet 12.

[0091] FIG22 shows a schematic diagram of another operating mode of a water source multi-split system for heating + heat recovery cooling water in some other embodiments. As shown in FIG22 , the specific operation of heating + cooling water is as follows: the indoor unit 3 is in heating operation, the first gas side stop valve 51 and the liquid side stop valve 60 are open, the second gas side stop valve 52 is closed, the first expansion valve 40 is throttled, the second expansion valve 70 is closed, the first port 21 of the first four-way valve is connected to the second port 22 of the first four-way valve, the third port 23 of the first four-way valve is connected to the fourth port 24 of the first four-way valve, the first port 31 of the second four-way valve is connected to the second port 32 of the second four-way valve, and the third port 33 of the second four-way valve is connected to the fourth port 24 of the first four-way valve. The four ports 34 are connected, the first port 171 of the third four-way valve and the second port 172 of the third four-way valve are connected, the third port 173 of the third four-way valve and the fourth port 174 of the third four-way valve are connected, and the high-temperature and high-pressure gaseous refrigerant is output from the compressor outlet 11 through the first four-way valve 20, the first gas side stop valve 51, and enters the indoor heat exchanger 3-1, and then flows back to the compressor 10 through the throttling device 3-2, the liquid side stop valve 60, the first expansion valve 40, the first plate heat exchanger 80, the third four-way valve 170, and the compressor inlet 12.

[0092] In this embodiment, the outdoor unit and water source multi-split system can realize independent cooling water, independent hot water making function, cooling + heat recovery hot water making, heating + hot water making, and heating + cooling water functions.

[0093] Those skilled in the art will understand that the disclosure scope of this application is not limited to the above specific embodiments, and certain elements of the embodiments may be modified and replaced without departing from the spirit of this application. The scope of this application is limited by the appended claims.

Claims

1. An outdoor unit, comprising: compressor; a first plate heat exchanger comprising a first refrigerant flow channel and a first water flow channel; a second plate heat exchanger comprising a second refrigerant flow channel and a second water flow channel, wherein one of the second water flow channel and the first water flow channel is configured to be connected to a water system terminal device, and the other is configured to be connected to a water source; a first four-way valve, wherein a first port thereof is connected to the third gas-side stop valve, a second port thereof is connected to the gas outlet of the compressor, a third port thereof is connected to the gas inlet of the compressor, and a fourth port thereof is connected to one end of the second refrigerant flow channel, and the other end of the second refrigerant flow channel is connected to the liquid-side stop valve via a second electronic expansion valve; A second four-way valve, whose second port is connected to the air outlet of the compressor, whose third port is connected to the air inlet of the compressor, and whose fourth port is connected to one end of the first refrigerant flow channel, and the other end of the first refrigerant flow channel is connected to the liquid side stop valve through the first electronic expansion valve.

2. The outdoor unit according to claim 1, wherein: A first water pump is provided on the first water flow channel to provide driving force for the flow of water in the first water flow channel; A second water pump is provided on the second water flow channel to provide driving force for the flow of water in the second water flow channel.

3. The outdoor unit according to claim 1, wherein A first pipeline is connected between the first port and the third port of the first four-way valve, and a first capillary is provided on the first pipeline. The first port and the third port of the second four-way valve are connected through a second pipeline, and a second capillary is provided on the second pipeline.

4. The outdoor unit according to claim 1, wherein The air outlet of the compressor is connected to a third pipeline, and the third pipeline is connected to the second port of the first four-way valve and the second port of the second four-way valve respectively through a three-way piece.

5. A multifunctional water source multi-connection system, including water system terminal equipment, It also includes the outdoor unit according to any one of claims 1 to 4, wherein the water system terminal device is connected to one of the first water flow channel and the second water flow channel of the outdoor unit.

6. The multifunctional water source multi-connection system according to claim 5, It also includes an indoor unit, which is provided with an indoor heat exchanger. One port of the indoor heat exchanger is connected to the third gas side stop valve of the outdoor unit, and the other port of the indoor heat exchanger is connected to the liquid side stop valve of the outdoor unit through a throttling device.

7. The multifunctional water source multi-split system according to claim 5 includes the following working modes: a separate hot water mode and a separate cooling water mode.

8. The multifunctional water source multi-connected system according to claim 7, wherein: The specific operation of the separate hot water production mode is as follows: the third gas-side stop valve and the liquid-side stop valve are both closed, the first water flow channel is connected to the water system terminal device, the second water flow channel is connected to the water source, the first electronic expansion valve is fully opened, and the second electronic expansion valve is throttled. The refrigerant is output from the air outlet of the compressor and flows through the second four-way valve, the first plate heat exchanger, the first electronic expansion valve, the second electronic expansion valve, the second plate heat exchanger, the first four-way valve, and then flows back to the compressor through the air inlet of the compressor; The specific operation of the separate cooling water mode is as follows: the third gas-side stop valve and the liquid-side stop valve are both closed, the first water flow channel is connected to the water system terminal equipment, the second water flow channel is connected to the water source, the first electronic expansion valve is throttled, and the second electronic expansion valve is fully opened. The refrigerant is output from the air outlet of the compressor and flows through the first four-way valve, the second plate heat exchanger, the second electronic expansion valve, the first electronic expansion valve, the first plate heat exchanger, the second four-way valve in sequence, and then flows back to the compressor through the air inlet of the compressor.

9. The multifunctional water source multi-split system according to claim 6 comprises the following working modes: cooling, heating, recycling and hot water making mode.

10. The multifunctional water source multi-connected system according to claim 9, wherein: The specific operation of the cooling + hot water mode is as follows: the indoor unit is in cooling operation, the third gas side stop valve and the liquid side stop valve are opened, the first water flow channel is connected to the water system terminal equipment, and the second water flow channel is connected to the water source. The first electronic expansion valve and the second electronic expansion valve are fully open, and the refrigerant is output from the air outlet of the compressor in two ways, flowing through the first four-way valve and the second four-way valve respectively. The refrigerant flowing through the first four-way valve then flows through the second plate heat exchanger, the second electronic expansion valve, the liquid side stop valve, and the throttling device to enter the indoor heat exchanger, and then flows back to the compressor through the third gas side stop valve and the first four-way valve. At the same time, the refrigerant flowing through the second four-way valve then flows through the first plate heat exchanger, the first electronic expansion valve, the liquid side stop valve, and the throttling device of the indoor unit to enter the indoor heat exchanger, and then flows back to the compressor through the third gas side stop valve and the first four-way valve.

11. An outdoor unit, comprising: compressor; a first plate heat exchanger comprising a first refrigerant flow channel and a first water flow channel; a second plate heat exchanger comprising a second refrigerant flow channel and a second water flow channel, wherein one of the second water flow channel and the first water flow channel is configured to be connected to a water system terminal device, and the other is configured to be connected to a water source; a first four-way valve, a first port of which is connected to the first gas-side stop valve, a second port of which is connected to the gas outlet of the compressor, and a third port of which is connected to the gas inlet of the compressor and connected to the second gas-side stop valve; a second four-way valve, wherein the second port thereof is connected to the air outlet of the compressor, the third port thereof is connected to the air inlet of the compressor and is connected to the second gas-side stop valve, and the fourth port thereof is connected to one end of the second refrigerant flow channel, the other end of which is connected to the liquid-side stop valve via a second expansion valve; A third four-way valve, whose second port is connected to the air outlet of the compressor, whose third port is connected to the air inlet of the compressor and connected to the second gas-side stop valve, whose fourth port is connected to one end of the first refrigerant flow channel, and the other end of the first refrigerant flow channel is connected to the liquid-side stop valve through the first expansion valve.

12. The outdoor unit according to claim 11, wherein A first water pump is provided on the first water flow channel to provide driving force for the flow of water in the first water flow channel; A second water pump is provided on the second water flow channel to provide driving force for the flow of water in the second water flow channel.

13. The outdoor unit according to claim 11, wherein A first pipeline is connected between the fourth port of the first four-way valve and its third port, and a first capillary is provided on the first pipeline. A second pipeline is connected between the first port and the third port of the second four-way valve, and a second capillary is provided on the second pipeline. A fifth pipeline is connected between the first port and the third port of the third four-way valve, and a third capillary is provided on the fifth pipeline.

14. The outdoor unit according to claim 11, wherein The air outlet of the compressor is connected to a fourth pipeline, and the second port of the first four-way valve, the second port of the second four-way valve, and the second port of the third four-way valve are connected in parallel to the fourth pipeline.

15. The outdoor unit according to claim 11, wherein The air inlet of the compressor is connected to a sixth pipeline, and the third port of the first four-way valve, the third port of the second four-way valve, and the third port of the third four-way valve are connected in parallel to the sixth pipeline.

16. A multifunctional water source machine, including water system terminal equipment, It also includes the outdoor unit according to any one of claims 11 to 15, wherein the water system terminal device is connected to one of the first water flow channel and the second water flow channel of the outdoor unit.

17. The multifunctional water source machine according to claim 16, It also includes an indoor unit, which is provided with an indoor heat exchanger. One port of the indoor heat exchanger is connected to the first gas side stop valve of the outdoor unit, and the other port of the indoor heat exchanger is connected to the liquid side stop valve of the outdoor unit through a throttling device.

18. The multifunctional water source machine according to claim 16, comprising the following operating modes: a separate hot water mode, a separate cooling water mode; The specific operation of the separate hot water mode is as follows: the first gas side stop valve, the second gas side stop valve and the liquid side stop valve are all closed, the first water flow channel is connected to the water system terminal equipment, the second water flow channel is connected to the water system terminal equipment, and the second water flow channel is connected to the water system terminal equipment. source, the first expansion valve is fully opened, the second expansion valve is throttled, and the refrigerant is output from the air outlet of the compressor and flows sequentially through the third four-way valve, the first plate heat exchanger, the first expansion valve, the second expansion valve, the second plate heat exchanger, the second four-way valve, and then flows back to the compressor through the air inlet of the compressor; The specific operation of the separate chilled water mode is as follows: the first gas side stop valve, the second gas side stop valve and the liquid side stop valve are all closed, the first water flow channel is connected to the water system terminal equipment, the second water flow channel is connected to the water source, the first expansion valve is throttled, and the second expansion valve is fully opened. The refrigerant is output from the air outlet of the compressor and flows through the second four-way valve, the second plate heat exchanger, the second expansion valve, the first expansion valve, the first plate heat exchanger, the third four-way valve in sequence, and then flows back to the compressor through the air inlet of the compressor.

19. The multifunctional water source machine according to claim 17, comprising the following working modes: cooling + heat recovery hot water making mode, heating + heat recovery hot water making mode, heating + heat recovery chilled water mode.

20. The multifunctional water source machine according to claim 19, wherein: The specific operation of the cooling + hot water mode is as follows: the indoor unit is in refrigeration operation, the first gas side stop valve and the liquid side stop valve are opened, the second gas side stop valve is closed, the first water flow channel is connected to the water system terminal equipment, the second water flow channel is connected to the water source, the first expansion valve is fully open, and the second expansion valve is throttled. The refrigerant is output from the air outlet of the compressor and passes through the third four-way valve, the first plate heat exchanger, the first expansion valve, the second expansion valve, the second plate heat exchanger, and the second four-way valve, and then flows back to the compressor through the air inlet of the compressor; at the same time, after flowing through the first expansion valve, the refrigerant also enters the indoor heat exchanger through the liquid side stop valve and the throttling device, and then flows back to the compressor through the first gas side stop valve and the first four-way valve.

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