Multi-connected air conditioning equipment

Abstract

The utility model discloses multi-connected air conditioning equipment which comprises a compression mechanism, a first four-way valve, a second four-way valve, a first heat exchanger, a third heat exchanger, a second throttling mechanism, a third throttling mechanism, a first one-way valve, a second one-way valve and at least two groups of indoor tail ends, the indoor tail end is composed of a second heat exchanger, a hot water reheater and a first throttling mechanism. In the flowing direction of the treated air at the indoor tail end, the second heat exchanger is located on the upwind side of the treated air, and the hot water reheater is located on the downwind side of the treated air; the inlet end of the hot water reheater is connected with the water side outlet end of the third heat exchanger through a high-temperature water supply pipe, and the outlet end of the hot water reheater is connected with the water side inlet end of the third heat exchanger through a high-temperature water return pipe. The system is characterized in that independent temperature and humidity control of each air-conditioned room can be realized in summer, and isothermal dehumidification of each air-conditioned room can be realized in spring and autumn; and each air-conditioned room can freely select a refrigerating function or a heating function according to the requirements of a user.

Description

Technical Field

[0001] The utility model relates to a multi-connected air conditioning device, belonging to the technical field of refrigeration. Background Art

[0002] With the development of economy and the improvement of people's living standards, at present, multi-connected air conditioning devices have been widely used in residential and public buildings. However, the current conventional multi-connected air conditioning devices (as shown in Figure 6) can only achieve the functions of cooling in summer and heating in winter. In the actual use process, the conventional multi-connected air conditioning devices have the following defects: 1) When cooling each air-conditioned room in summer, the heat recovery of the cooling condensation heat cannot be achieved; 2) When cooling in summer, only the control of the dry bulb temperature of the indoor air can be achieved, and the separate independent control of the temperature and humidity of the air-conditioned room cannot be achieved; when dehumidifying each air-conditioned room in spring and autumn, isothermal dehumidification cannot be achieved; 3) All air-conditioned rooms can only use the cooling function or the heating function simultaneously, and cannot freely select the cooling function or the heating function according to the needs of the user, that is, some air-conditioned rooms are cooled while some other air-conditioned rooms are heated at the same time.

[0003] In order to overcome the defects of the conventional multi-connected air conditioning devices and enable the multi-connected air conditioning device to achieve the functions of cooling in summer and heating in winter during the whole-year operation, and also to achieve the function of providing domestic hot water throughout the year; the applicant of the present invention submitted a patent for invention on October 31, 2011 and obtained authorization on December 10, 2014. The patent number is 201110355046.1. This patent for invention can constitute a multi-connected air conditioning device that can provide domestic hot water throughout the year (as shown in Figure 5); that is, during the whole-year operation, it can achieve the functions of cooling in summer and heating in winter, and can also achieve the function of providing domestic hot water throughout the year.

[0004] However, the defects of this solution are still: 1) When cooling in summer, the independent control of the temperature and humidity of the air-conditioned room cannot be achieved; when dehumidifying in spring and autumn, isothermal dehumidification cannot be achieved. 2) All air-conditioned rooms can only use the cooling function or the heating function simultaneously, and cannot freely select the cooling function or the heating function according to the needs of the user, that is, some air-conditioned rooms are cooled while some other air-conditioned rooms are heated at the same time. Summary of the Invention

[0005] The purpose of the utility model is to provide a multi-connected air conditioning device, which can achieve the independent control of the temperature and humidity of each air-conditioned room when cooling in summer, can achieve the isothermal dehumidification of each air-conditioned room when dehumidifying in spring and autumn; and each air-conditioned room can freely select the cooling function or the heating function according to the needs of the user; and further can provide domestic hot water heating throughout the year.

[0006] In order to overcome the problems existing in the above technologies, the technical solution for the utility model to solve the technical problems is:

[0007] 1. A multi-connected air conditioning device, comprising a compression mechanism (1), a first four-way valve (70), a second four-way valve (80), a first heat exchanger (3), a third heat exchanger (8), a second throttling mechanism (5), a third throttling mechanism (7), a first check valve (21) and a second check valve (22), characterized in that: the multi-connected air conditioning device further comprises at least two groups of indoor terminals (20); the indoor terminal (20) is composed of a second heat exchanger (6), a hot water reheater (2) and a first throttling mechanism (4); along the flow direction of the air processed by the indoor terminal (20), the second heat exchanger (6) is on the upstream side of the processed air, and the hot water reheater (2) is on the downstream side of the processed air;

[0008] The inlet end of the hot water reheater (2) is connected to the water side outlet end of the third heat exchanger (8) through a high-temperature water supply pipe (23), and the outlet end of the hot water reheater (2) is connected to the water side inlet end of the third heat exchanger (8) through a high-temperature water return pipe (24);

[0009] One end of the second heat exchanger (6) is connected to the second commutation node (73) of the two commutation nodes of the first four-way valve (70) through a sixty-fourth pipe (64), and the other end of the second heat exchanger (6) passes through the first throttling mechanism (4), a fifty-seventh pipe (57), the second throttling mechanism (5), the first heat exchanger (3), and a sixty-seventh pipe (67) in sequence and is connected to the fourth commutation node (83) of the two commutation nodes of the second four-way valve (80);

[0010] The third commutation node (81) of the second four-way valve (80) is connected to the first commutation node (71) of the first four-way valve (70) through the inlet end of the second check valve (22), the outlet end of the second check valve (22), the outlet end of the first check valve (21), and the inlet end of the first check valve (21) in sequence;

[0011] The refrigerant side inlet end of the third heat exchanger (8) is connected to the pipe between the outlet end of the second check valve (22) and the outlet end of the first check valve (21), and the refrigerant side outlet end of the third heat exchanger (8) is connected to the fifty-seventh pipe (57) through the third throttling mechanism (7) and a fifty-third pipe (53) in sequence;

[0012] The low-pressure node (72) of the first four-way valve (70) is connected to the low-pressure node (82) of the second four-way valve (80) through the sixty-fifth pipeline (65). The high-pressure node (74) of the first four-way valve (70) is successively connected to the sixty-fifth pipeline (65) between the low-pressure node (72) of the first four-way valve (70) and the low-pressure node (82) of the second four-way valve (80) through the sixtieth pipeline (60), the outlet end of the compression mechanism (1), the inlet end of the compression mechanism (1), and the sixty-third pipeline (63). The high-pressure node (84) of the second four-way valve (80) is connected to the sixtieth pipeline (60) between the outlet end of the compression mechanism (1) and the high-pressure node (74) of the first four-way valve (70) through the fifty-ninth pipeline (59).

[0013] 2. A multi-connected air conditioning device, comprising a compression mechanism (1), a first four-way valve (70), a second four-way valve (80), a first heat exchanger (3), a third heat exchanger (8), a second throttling mechanism (5), a third throttling mechanism (7), a first check valve (21), and a second check valve (22), characterized in that: the multi-connected air conditioning device further comprises an air conditioning water separator (40) and at least two groups of indoor terminals (20); the indoor terminal (20) is composed of a second heat exchanger (6), a hot water reheater (2), and a first throttling mechanism (4); along the flow direction of the air processed by the indoor terminal (20), the second heat exchanger (6) is on the upwind side of the processed air, and the hot water reheater (2) is on the downwind side of the processed air;

[0014] The inlet end of the hot water reheater (2) is connected to the branch outlet end of the water distribution main pipe (34) of the air conditioning water separator (40), and the outlet end of the hot water reheater (2) is connected to the branch inlet end of the water collection main pipe (35) of the air conditioning water separator (40);

[0015] The inlet end of the water distribution main pipe (34) of the air conditioning water separator (40) is successively connected to the outlet end of the high-temperature water supply pipe (23), the inlet end of the high-temperature water supply pipe (23), and the water side outlet end of the third heat exchanger (8). The outlet end of the water collection main pipe (35) of the air conditioning water separator (40) is successively connected to the inlet end of the high-temperature return water pipe (24), the outlet end of the high-temperature return water pipe (24), and the water side inlet end of the third heat exchanger (8);

[0016] One end of the second heat exchanger (6) is connected to the second commutation node (73) of the two commutation nodes of the first four-way valve (70) through the sixty-fourth pipeline (64). The other end of the second heat exchanger (6) is successively connected to the fourth commutation node (83) of the two commutation nodes of the second four-way valve (80) through the first throttling mechanism (4), the fifty-seventh pipeline (57), the second throttling mechanism (5), the first heat exchanger (3), and the sixty-seventh pipeline (67);

[0017] The third commutation node (81) of the second four-way valve (80) is connected to the first commutation node (71) of the first four-way valve (70) in sequence through the inlet end of the second check valve (22), the outlet end of the second check valve (22), the outlet end of the first check valve (21), and the inlet end of the first check valve (21).

[0018] The refrigerant-side inlet end of the third heat exchanger (8) is connected to the pipeline between the outlet end of the second check valve (22) and the outlet end of the first check valve (21). The refrigerant-side outlet end of the third heat exchanger (8) is connected to the fifty-seventh pipeline (57) through the third throttling mechanism (7) and the fifty-third pipeline (53) in sequence.

[0019] The low-pressure node (72) of the first four-way valve (70) is connected to the low-pressure node (82) of the second four-way valve (80) through the sixty-fifth pipeline (65). The high-pressure node (74) of the first four-way valve (70) is connected to the sixty-fifth pipeline (65) between the low-pressure node (72) of the first four-way valve (70) and the low-pressure node (82) of the second four-way valve (80) through the sixtieth pipeline (60), the outlet end of the compression mechanism (1), the inlet end of the compression mechanism (1), and the sixty-third pipeline (63) in sequence. The high-pressure node (84) of the second four-way valve (80) is connected to the sixtieth pipeline (60) between the outlet end of the compression mechanism (1) and the high-pressure node (74) of the first four-way valve (70) through the fifty-ninth pipeline (59).

[0020] 3. A multi-connected air-conditioning device, comprising a compression mechanism (1), a first four-way valve (70), a second four-way valve (80), a first heat exchanger (3), a third heat exchanger (8), a second throttling mechanism (5), a third throttling mechanism (7), a first check valve (21), and a second check valve (22), characterized in that: the multi-connected air-conditioning device further comprises a hot water tank (30) and at least two groups of indoor terminals (20); the indoor terminal (20) is composed of a second heat exchanger (6), a hot water reheater (2), and a first throttling mechanism (4); along the flow direction of the air processed by the indoor terminal (20), the second heat exchanger (6) is on the upstream side of the processed air, and the hot water reheater (2) is on the downstream side of the processed air.

[0021] The inlet end of the hot water reheater (2) is connected to the hot water tank (30) through a low-temperature water supply pipe (25), and the outlet end of the hot water reheater (2) is also connected to the hot water tank (30) through a low-temperature water return pipe (26).

[0022] The water-side inlet end of the third heat exchanger (8) is connected to the hot water tank (30) through the outlet end of the high-temperature return water pipe (24) and the inlet end of the high-temperature return water pipe (24) in sequence; the water-side outlet end of the third heat exchanger (8) is connected to the hot water tank (30) through the inlet end of the high-temperature water supply pipe (23) and the outlet end of the high-temperature water supply pipe (23) in sequence;

[0023] One end of the second heat exchanger (6) is connected to the second commutation node (73) of the two commutation nodes of the first four-way valve (70) through the sixty-fourth pipeline (64), and the other end of the second heat exchanger (6) passes through the first throttling mechanism (4), the fifty-seventh pipeline (57), the second throttling mechanism (5), the first heat exchanger (3), and the sixty-seventh pipeline (67) in sequence and is connected to the fourth commutation node (83) of the two commutation nodes of the second four-way valve (80);

[0024] The third commutation node (81) of the second four-way valve (80) is connected to the first commutation node (71) of the first four-way valve (70) through the inlet end of the second check valve (22), the outlet end of the second check valve (22), the outlet end of the first check valve (21), and the inlet end of the first check valve (21) in sequence;

[0025] The refrigerant-side inlet end of the third heat exchanger (8) is connected to the pipeline between the outlet end of the second check valve (22) and the outlet end of the first check valve (21), and the refrigerant-side outlet end of the third heat exchanger (8) is connected to the fifty-seventh pipeline (57) through the third throttling mechanism (7) and the fifty-third pipeline (53) in sequence;

[0026] The low-pressure node (72) of the first four-way valve (70) is connected to the low-pressure node (82) of the second four-way valve (80) through the sixty-fifth pipeline (65), and the high-pressure node (74) of the first four-way valve (70) passes through the sixtieth pipeline (60), the outlet end of the compression mechanism (1), the inlet end of the compression mechanism (1), and the sixty-third pipeline (63) in sequence and is connected to the sixty-fifth pipeline (65) between the low-pressure node (72) of the first four-way valve (70) and the low-pressure node (82) of the second four-way valve (80), and the high-pressure node (84) of the second four-way valve (80) is connected to the sixtieth pipeline (60) between the outlet end of the compression mechanism (1) and the high-pressure node (74) of the first four-way valve (70) through the fifty-ninth pipeline (59).

[0027] 4. A multi-connected air conditioning device, comprising a compression mechanism (1), a first four-way valve (70), a second four-way valve (80), a first heat exchanger (3), a third heat exchanger (8), a second throttling mechanism (5), a third throttling mechanism (7), a first check valve (21) and a second check valve (22), characterized in that: the multi-connected air conditioning device further comprises a hot water tank (30), an air conditioning manifold (40), and at least two groups of indoor terminals (20); the indoor terminal (20) consists of a second heat exchanger (6), a hot water reheater (2), and a first throttling mechanism (4); along the flow direction of the air processed by the indoor terminal (20), the second heat exchanger (6) is on the upstream side of the processed air, and the hot water reheater (2) is on the downstream side of the processed air;

[0028] The inlet end of the hot water reheater (2) is connected to the branch outlet end of the water distribution main pipe (34) of the air conditioning manifold (40), and the outlet end of the hot water reheater (2) is connected to the branch inlet end of the water collection main pipe (35) of the air conditioning manifold (40); the inlet end of the water distribution main pipe (34) of the air conditioning manifold (40) is connected to the hot water tank (30) through the outlet end and the inlet end of the low-temperature water supply pipe (25) in sequence, and the outlet end of the water collection main pipe (35) of the air conditioning manifold (40) is also connected to the hot water tank (30) through the inlet end and the outlet end of the low-temperature water return pipe (26) in sequence;

[0029] The water-side inlet end of the third heat exchanger (8) is connected to the hot water tank (30) through the outlet end and the inlet end of the high-temperature water return pipe (24) in sequence; the water-side outlet end of the third heat exchanger (8) is connected to the hot water tank (30) through the inlet end and the outlet end of the high-temperature water supply pipe (23) in sequence;

[0030] One end of the second heat exchanger (6) is connected to the second commutation node (73) of the two commutation nodes of the first four-way valve (70) through the sixty-fourth pipeline (64), and the other end of the second heat exchanger (6) is connected to the fourth commutation node (83) of the two commutation nodes of the second four-way valve (80) through the first throttling mechanism (4), the fifty-seventh pipeline (57), the second throttling mechanism (5), the first heat exchanger (3), and the sixty-seventh pipeline (67) in sequence;

[0031] The third commutation node (81) of the second four-way valve (80) is connected to the first commutation node (71) of the first four-way valve (70) through the inlet end, the outlet end of the second check valve (22), the outlet end, and the inlet end of the first check valve (21) in sequence;

[0032] The inlet end of the refrigerant side of the third heat exchanger (8) is connected to the pipeline between the outlet end of the second one-way valve (22) and the outlet end of the first one-way valve (21). The outlet end of the refrigerant side of the third heat exchanger (8) is successively connected to the fifty-seventh pipeline (57) through the third throttling mechanism (7) and the fifty-third pipeline (53);

[0033] The low-pressure node (72) of the first four-way valve (70) is connected to the low-pressure node (82) of the second four-way valve (80) through the sixty-fifth pipeline (65). The high-pressure node (74) of the first four-way valve (70) is successively connected to the sixty-fifth pipeline (65) between the low-pressure node (72) of the first four-way valve (70) and the low-pressure node (82) of the second four-way valve (80) through the sixtieth pipeline (60), the outlet end of the compression mechanism (1), the inlet end of the compression mechanism (1), and the sixty-third pipeline (63). The high-pressure node (84) of the second four-way valve (80) is connected to the sixtieth pipeline (60) between the outlet end of the compression mechanism (1) and the high-pressure node (74) of the first four-way valve (70) through the fifty-ninth pipeline (59).

[0034] 5. A multi-connected air-conditioning device, comprising a compression mechanism (1), a first four-way valve (70), a second four-way valve (80), a first heat exchanger (3), a third heat exchanger (8), a second throttling mechanism (5), a third throttling mechanism (7), a first one-way valve (21), and a second one-way valve (22), characterized in that: the multi-connected air-conditioning device further comprises a hot water tank (30), a confluence three-way regulating valve (32), and at least two groups of indoor terminals (20); the indoor terminal (20) is composed of a second heat exchanger (6), a hot water reheater (2), and a first throttling mechanism (4); along the flow direction of the air processed by the indoor terminal (20), the second heat exchanger (6) is on the upwind side of the processed air, and the hot water reheater (2) is on the downwind side of the processed air;

[0035] One end of the second heat exchanger (6) is connected to the second commutation node (73) of the two commutation nodes of the first four-way valve (70) through the sixty-fourth pipeline (64). The other end of the second heat exchanger (6) is successively connected to the fourth commutation node (83) of the two commutation nodes of the second four-way valve (80) through the first throttling mechanism (4), the fifty-seventh pipeline (57), the second throttling mechanism (5), the first heat exchanger (3), and the sixty-seventh pipeline (67);

[0036] The third commutation node (81) of the second four-way valve (80) is successively connected to the first commutation node (71) of the first four-way valve (70) through the inlet end of the second one-way valve (22), the outlet end of the second one-way valve (22), the outlet end of the first one-way valve (21), and the inlet end of the first one-way valve (21);

[0037] The inlet end of the refrigerant side of the third heat exchanger (8) is connected to the pipeline between the outlet end of the second one-way valve (22) and the outlet end of the first one-way valve (21). The outlet end of the refrigerant side of the third heat exchanger (8) is successively connected to the fifty-seventh pipeline (57) through the third throttling mechanism (7) and the fifty-third pipeline (53);

[0038] The low-pressure node (72) of the first four-way valve (70) is connected to the low-pressure node (82) of the second four-way valve (80) through the sixty-fifth pipeline (65). The high-pressure node (74) of the first four-way valve (70) is successively connected to the sixty-fifth pipeline (65) between the low-pressure node (72) of the first four-way valve (70) and the low-pressure node (82) of the second four-way valve (80) through the sixtieth pipeline (60), the outlet end of the compression mechanism (1), the inlet end of the compression mechanism (1), and the sixty-third pipeline (63). The high-pressure node (84) of the second four-way valve (80) is connected to the sixtieth pipeline (60) between the outlet end of the compression mechanism (1) and the high-pressure node (74) of the first four-way valve (70) through the fifty-ninth pipeline (59);

[0039] The outlet end of the water side of the third heat exchanger (8) is successively connected to the hot water tank (30) through the inlet end of the high-temperature water supply pipe (23) and the outlet end of the high-temperature water supply pipe (23);

[0040] The inlet end of the water side of the third heat exchanger (8) is successively connected to the hot water tank (30) through the outlet end of the high-temperature return water pipe (24), the inlet end of the high-temperature return water pipe (24), the outlet of the combined three-way regulating valve (32), and the direct current inlet (16) of the combined three-way regulating valve (32). The bypass inlet (15) of the combined three-way regulating valve (32) is connected to the high-temperature water supply pipe (23);

[0041] The inlet end of the hot water reheater (2) is connected to the hot water tank (30) through a low-temperature water supply pipe (25). The outlet end of the hot water reheater (2) is connected to the high-temperature return water pipe (24) between the inlet end of the water side of the third heat exchanger (8) and the outlet of the combined three-way regulating valve (32) through a low-temperature return water pipe (26).

[0042] 6. A multi-connected air conditioning device, comprising a compression mechanism (1), a first four-way valve (70), a second four-way valve (80), a first heat exchanger (3), a third heat exchanger (8), a second throttling mechanism (5), a third throttling mechanism (7), a first check valve (21) and a second check valve (22), characterized in that: the multi-connected air conditioning device further comprises a hot water tank (30), a combined flow three-way regulating valve (32), an air conditioning manifold (40), and at least two groups of indoor terminals (20); the indoor terminal (20) is composed of a second heat exchanger (6), a hot water reheater (2), and a first throttling mechanism (4); along the flow direction of the air processed by the indoor terminal (20), the second heat exchanger (6) is on the upwind side of the processed air, and the hot water reheater (2) is on the downwind side of the processed air;

[0043] One end of the second heat exchanger (6) is connected to the second commutation node (73) of the two commutation nodes of the first four-way valve (70) through a sixty-fourth pipeline (64), and the other end of the second heat exchanger (6) is sequentially connected to the fourth commutation node (83) of the two commutation nodes of the second four-way valve (80) through a first throttling mechanism (4), a fifty-seventh pipeline (57), a second throttling mechanism (5), a first heat exchanger (3), and a sixty-seventh pipeline (67);

[0044] The third commutation node (81) of the second four-way valve (80) is sequentially connected to the first commutation node (71) of the first four-way valve (70) through the inlet end of the second check valve (22), the outlet end of the second check valve (22), the outlet end of the first check valve (21), and the inlet end of the first check valve (21);

[0045] The refrigerant side inlet end of the third heat exchanger (8) is connected to the pipeline between the outlet end of the second check valve (22) and the outlet end of the first check valve (21), and the refrigerant side outlet end of the third heat exchanger (8) is sequentially connected to the fifth-seventh pipeline (57) through a third throttling mechanism (7) and a fifty-third pipeline (53);

[0046] The low-pressure node (72) of the first four-way valve (70) is connected to the low-pressure node (82) of the second four-way valve (80) through a sixty-fifth pipeline (65), the high-pressure node (74) of the first four-way valve (70) is sequentially connected to the sixty-fifth pipeline (65) between the low-pressure node (72) of the first four-way valve (70) and the low-pressure node (82) of the second four-way valve (80) through a sixtieth pipeline (60), the outlet end of the compression mechanism (1), the inlet end of the compression mechanism (1), and a sixty-third pipeline (63), and the high-pressure node (84) of the second four-way valve (80) is connected to the sixtieth pipeline (60) between the outlet end of the compression mechanism (1) and the high-pressure node (74) of the first four-way valve (70) through a fifty-ninth pipeline (59);

[0047] The outlet end of the water side of the third heat exchanger (8) is connected to the hot water tank (30) in sequence through the inlet end of the high-temperature water supply pipe (23) and the outlet end of the high-temperature water supply pipe (23).

[0048] The inlet end of the water side of the third heat exchanger (8) is connected to the hot water tank (30) in sequence through the outlet end of the high-temperature return water pipe (24), the inlet end of the high-temperature return water pipe (24), the outlet of the combined three-way regulating valve (32), and the direct current inlet (16) of the combined three-way regulating valve (32). The bypass inlet (15) of the combined three-way regulating valve (32) is connected to the high-temperature water supply pipe (23).

[0049] The inlet end of the hot water reheater (2) is connected to the branch outlet end of the water distribution main pipe (34) of the air-conditioning water collector and distributor (40), and the outlet end of the hot water reheater (2) is connected to the branch inlet end of the water collection main pipe (35) of the air-conditioning water collector and distributor (40).

[0050] The inlet end of the water distribution main pipe (34) of the air-conditioning water collector and distributor (40) is connected to the hot water tank (30) in sequence through the outlet end of the low-temperature water supply pipe (25) and the inlet end of the low-temperature water supply pipe (25). The outlet end of the water collection main pipe (35) of the air-conditioning water collector and distributor (40) is connected to the high-temperature return water pipe (24) between the inlet end of the water side of the third heat exchanger (8) and the outlet of the combined three-way regulating valve (32) in sequence through the inlet end of the low-temperature return water pipe (26) and the outlet end of the low-temperature return water pipe (26).

[0051] In the above-mentioned solutions from 1 to 6, a hot water regulating valve (12) can be added to the pipeline at the inlet end or the outlet end of the hot water reheater (2) to make further improvements to them respectively.

[0052] In the above-mentioned solutions from 1 to 2, a heating water collector and distributor can be added respectively to make further improvements to them. The connection method of the heating water collector and distributor in the system is: the inlet end of the water distribution main pipe of the heating water collector and distributor is connected to the high-temperature water supply pipe (23), and the outlet end of the water collection main pipe of the heating water collector and distributor is connected to the high-temperature return water pipe (24).

[0053] In the above-mentioned solutions of 2, 4, and 6, a heating water collector and distributor can be added respectively to make further improvements to them. The connection method of the heating water collector and distributor in the system is: the inlet end of the water distribution main pipe of the heating water collector and distributor is connected to the inlet end of the water distribution main pipe (34) of the air-conditioning water collector and distributor (40) through the outlet end of the water distribution main pipe (34) of the air-conditioning water collector and distributor (40); the outlet end of the water collection main pipe of the heating water collector and distributor is connected to the outlet end of the water collection main pipe (35) of the air-conditioning water collector and distributor (40) through the inlet end of the water collection main pipe (35) of the air-conditioning water collector and distributor (40).

[0054] In the solutions described in Items 3 to 6 above, a heating manifold can be added respectively to further improve them. The connection mode of the heating manifold in the system is: the inlet end of the water distribution main pipe of the heating manifold is connected to the low-temperature water supply pipe (25), and the outlet end of the water collection main pipe of the heating manifold is connected to the low-temperature water return pipe (26).

[0055] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0056] 1. During summer cooling, independent temperature and humidity control of each air-conditioned room can be achieved; during dehumidification in spring and autumn, isothermal dehumidification of each air-conditioned room can be achieved;

[0057] 2. Each air-conditioned room can freely select the cooling or heating function according to the needs of users;

[0058] 3. Year-round domestic hot water heating can be achieved;

[0059] 4. The present utility model is applicable to multi-split air-conditioning equipment for industrial and civil use, and is particularly applicable to occasions with requirements for independent temperature and humidity control. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 is a schematic structural diagram of Embodiment 1 of the present utility model;

[0061] Figure 2 is a schematic structural diagram of Embodiment 2 of the present utility model;

[0062] Figure 3 is a schematic structural diagram of Embodiment 3 of the present utility model;

[0063] Figure 4 is a schematic structural diagram of Embodiment 4 of the present utility model;

[0064] Figure 5 is a schematic structural diagram of the prior art;

[0065] Figure 6 is a schematic structural diagram of the prior art. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0066] The content of the present utility model will be further described in detail below with reference to the drawings.

[0067] Embodiment 1

[0068] As Figure 1As shown in the figure, this embodiment is a multi-connected air conditioning device that can meet the requirements of independent temperature and humidity control and is used in occasions with independent temperature and humidity control requirements. The entire device includes the following components: a compression mechanism 1, a first four-way valve 70, a second four-way valve 80, a second throttling mechanism 5, a third throttling mechanism 7, a first heat exchanger 3, a third heat exchanger 8, a first check valve 21, a second check valve 22, a hot water pump 9, a circulating water pump 10, a hot water tank 30, and at least two groups of indoor terminals 20.

[0069] The indoor terminal 20 is composed of a group of second heat exchangers 6, a group of hot water reheaters 2, a first throttling mechanism 4, and a hot water regulating valve 12. Along the flow direction of the air processed by the indoor terminal 20, the second heat exchanger 6 is on the upstream side of the processed air, while the hot water reheater 2 is on the downstream side of the processed air.

[0070] The first throttling mechanism 4, the second throttling mechanism 5, and the third throttling mechanism 7 are all electronic expansion valves. The hot water regulating valve 12 is an electric two-way regulating valve, which is used to regulate the dry bulb temperature of the processed air according to the needs of users.

[0071] During operation, the second heat exchanger 6 is the user-side heat exchanger, acting as an evaporator in summer to cool the users, and as a condenser in winter to heat the users; the first heat exchanger 3 is the heat source-side heat exchanger, which can act as a condenser to dissipate the condensation heat generated by refrigeration to the environment (outdoor air, or cooling water, or soil, etc.), or as an evaporator to absorb heat from the environment to heat the users or produce hot water; the third heat exchanger 8 is a hot water heater, which is used to produce hot water throughout the year; the produced hot water is supplied to the hot water reheater 2 for heating or reheating the air of the indoor terminal 20 to control the indoor dry bulb temperature.

[0072] This multi-connected air conditioning device can achieve multiple functions, and the working processes under each function are described as follows.

[0073] (1) Refrigeration function

[0074] Under this function, all the condensation heat generated by refrigeration is discharged into the environment (outdoor air, or cooling water, or soil, etc.) through the first heat exchanger 3. The second heat exchanger 6 cools the users, and the third heat exchanger 8 and the hot water reheater 2 do not work. During operation, the second throttling mechanism 5 is fully open, the first throttling mechanism 4 works normally for refrigerant throttling; the third throttling mechanism 7 and the hot water regulating valve 12 are closed; the hot water pump 9 and the circulating water pump 10 also do not work.

[0075] Its working process is as follows: After the refrigerant is discharged from the outlet end of the compression mechanism 1, it successively passes through the 60th pipeline 60, the 59th pipeline 59, the high-pressure node 84 of the second four-way valve 80, the fourth commutation node 83 of the second four-way valve 80, the 67th pipeline 67, the first heat exchanger 3, the second throttling mechanism 5, the 57th pipeline 57, the first throttling mechanism 4, the second heat exchanger 6, the 64th pipeline 64, the second commutation node 73 of the first four-way valve 70, the low-pressure node 72 of the first four-way valve 70, the 65th pipeline 65, and the 63rd pipeline 63, and returns to the inlet end of the compression mechanism 1 and enters the compression mechanism 1 to be compressed, completing one cycle.

[0076] (2) Refrigeration and total heat recovery for hot water production function

[0077] In this function, the third heat exchanger 8 uses all the condensation heat generated by refrigeration to produce hot water; the second heat exchanger 6 in the indoor terminal 20 is used for air cooling and dehumidification to control the indoor wet bulb temperature; the hot water reheater 2 in the indoor terminal 20 is used for reheating the cooled and dehumidified air to control the indoor air dry bulb temperature. The first heat exchanger 3 does not work.

[0078] During operation, the second throttling mechanism 5 is closed, the first throttling mechanism 4 works normally for refrigerant throttling; the third throttling mechanism 7 is fully open. The hot water pump 9 and the circulating water pump 10 also work normally; the hot water regulating valve 12 also works normally to regulate the hot water flow through the hot water reheater 2, thereby realizing the control of the indoor dry bulb temperature.

[0079] Its refrigerant working process is as follows: After the refrigerant is discharged from the outlet end of the compression mechanism 1, it enters the 60th pipeline 60 and is divided into two paths; the first path successively passes through the high-pressure node 74 of the first four-way valve 70, the first commutation node 71 of the first four-way valve 70, the inlet end of the first check valve 21, and the outlet end of the first check valve 21, and enters the pipeline at the refrigerant side inlet end of the third heat exchanger 8; the other path successively passes through the 59th pipeline 59, the high-pressure node 84 of the second four-way valve 80, the third commutation node 81 of the second four-way valve 80, the inlet end of the second check valve 22, and the outlet end of the second check valve 22, and also enters the pipeline at the refrigerant side inlet end of the third heat exchanger 8; after the two paths of refrigerant are mixed in the pipeline at the refrigerant side inlet end of the third heat exchanger 8, they successively pass through the third heat exchanger 8, the third throttling mechanism 7, the 53rd pipeline 53, the 57th pipeline 57, the first throttling mechanism 4, the second heat exchanger 6, the 64th pipeline 64, the second commutation node 73 of the first four-way valve 70, the low-pressure node 72 of the first four-way valve 70, the 65th pipeline 65, and the 63rd pipeline 63, and returns to the inlet end of the compression mechanism 1 and enters the compression mechanism 1 to be compressed, completing one cycle.

[0080] The hot water working process under this function is divided into two parts: the high-temperature side hot water working process and the low-temperature side hot water working process, which are described separately as follows.

[0081] (1) High-temperature side hot water working process:

[0082] The hot water coming out of the hot water tank 30 sequentially passes through the inlet end of the high-temperature return pipe 24, the outlet end of the high-temperature return pipe 24, the suction end of the hot water pump 9, the discharge end of the hot water pump 9, and the water-side inlet end of the third heat exchanger 8, enters the third heat exchanger 8 for heat exchange with the refrigerant, absorbs heat and the temperature rises, and then sequentially passes through the water-side outlet end of the third heat exchanger 8, the inlet end of the high-temperature supply pipe 23, the outlet end of the high-temperature supply pipe 23, and returns to the hot water tank 30.

[0083] (2) Low-temperature side hot water working process:

[0084] For the indoor terminal 20 at the end of the most unfavorable loop of the hot water system: The hot water coming out of the hot water tank 30 sequentially passes through the suction end of the circulation pump 10, the discharge end of the circulation pump 10, the inlet end of the low-temperature supply pipe 25, the outlet end of the low-temperature supply pipe 25, and the inlet end of the hot water reheater 2, enters the hot water reheater 2 for heat exchange with the air cooled and dehumidified by the second heat exchanger 6, reheats the air, the hot water releases heat and the temperature decreases, and then sequentially passes through the outlet end of the hot water reheater 2, the inlet end of the hot water regulating valve 12, the outlet end of the hot water regulating valve 12, the inlet end of the low-temperature return pipe 26, the outlet end of the low-temperature return pipe 26, and returns to the hot water tank 30.

[0085] For the connection mode of the hot water reheater 2 of other indoor terminals 20: The inlet end of the hot water reheater 2 is connected to the low-temperature supply pipe 25, and the outlet end of the hot water reheater 2 sequentially passes through the inlet end of the hot water regulating valve 12 and the outlet end of the hot water regulating valve 12 and is connected to the low-temperature return pipe 26. During operation, the hot water also flows into these indoor terminals 20 under the drive of the circulation pump 10.

[0086] (3) Refrigeration and partial heat recovery for hot water production function

[0087] In this function, the third heat exchanger 8 uses part of the condensation heat generated by refrigeration to produce hot water; the second heat exchanger 6 in the indoor terminal 20 is used for air cooling and dehumidification to control the indoor wet bulb temperature; the hot water reheater 2 in the indoor terminal 20 is used for reheating the air after cooling and dehumidification to control the indoor air dry bulb temperature. The first heat exchanger 3 is a condenser, which dissipates the remaining condensation heat to the outdoor air.

[0088] During operation, the second throttling mechanism 5 and the third throttling mechanism 7 both work normally, respectively used to regulate the hot water outlet water temperature of the third heat exchanger 8; the first throttling mechanism 4 works normally, used for refrigerant throttling. The hot water pump 9 and the circulation pump 10 both work normally; the hot water regulating valve 12 also works normally, used to adjust the hot water flow rate through the hot water reheater 2, so as to realize the control of the indoor dry bulb temperature.

[0089] Its refrigerant working process is as follows: After the refrigerant is discharged from the outlet end of the compression mechanism 1, it enters the 60th pipeline 60 and is divided into two paths; the first path sequentially passes through the high-pressure node 74 of the first four-way valve 70, the first commutation node 71 of the first four-way valve 70, the inlet end of the first check valve 21, the outlet end of the first check valve 21, the refrigerant-side inlet end of the third heat exchanger 8, the refrigerant-side outlet end of the third heat exchanger 8, the third throttling mechanism 7, and the 53rd pipeline 53 to enter the 57th pipeline 57; the other path sequentially passes through the 59th pipeline 59, the high-pressure node 84 of the second four-way valve 80, the fourth commutation node 83 of the second four-way valve 80, the 67th pipeline 67, the first heat exchanger 3, and the second throttling mechanism 5, and also enters the 57th pipeline 57; after the two paths of refrigerant are mixed in the 57th pipeline 57, they sequentially pass through the first throttling mechanism 4, the second heat exchanger 6, the 64th pipeline 64, the second commutation node 73 of the first four-way valve 70, the low-pressure node 72 of the first four-way valve 70, the 65th pipeline 65, and the 63rd pipeline 63, return to the inlet end of the compression mechanism 1, enter the compression mechanism 1 and are compressed, completing one cycle.

[0090] The hot water working process under this function is the same as the refrigeration and total heat recovery for hot water production function of this embodiment.

[0091] (4) Function of simultaneous refrigeration and hot water production according to user needs

[0092] This function is applicable to spring and autumn. Under this function, the refrigeration capacity and hot water volume can be independently adjusted simultaneously according to user needs. At this time, the first heat exchanger 3 absorbs heat from the environment; the second heat exchanger 6 in the indoor terminal 20 is used for air cooling and dehumidification to control the indoor wet-bulb temperature; the condensation heat generated by cooling and dehumidification and the heat absorbed from the environment are both used for hot water production in the third heat exchanger 8. During operation, the first throttling mechanism 4 and the second throttling mechanism 5 both work normally, respectively used to adjust the refrigerant flow rates through the second heat exchanger 6 and the first heat exchanger 3; the third throttling mechanism 7 is fully open.

[0093] Under this function, the hot water reheater 2 in the indoor terminal 20 is used to reheat the air after cooling and dehumidification to control the indoor air dry-bulb temperature. During operation, the hot water pump 9 and the circulation pump 10 both work normally; the hot water regulating valve 12 also works normally, used to adjust the hot water flow rate through the hot water reheater 2, thereby realizing the control of the indoor dry-bulb temperature.

[0094] Its refrigerant working process is as follows: After the refrigerant is discharged from the outlet end of the compression mechanism 1, it enters the 60th pipeline 60 and is divided into two paths; the first path successively passes through the high-pressure node 74 of the first four-way valve 70, the first commutation node 71 of the first four-way valve 70, the inlet end of the first check valve 21, the outlet end of the first check valve 21, and enters the pipeline at the refrigerant-side inlet end of the third heat exchanger 8; the other path successively passes through the 59th pipeline 59, the high-pressure node 84 of the second four-way valve 80, the third commutation node 81 of the second four-way valve 80, the inlet end of the second check valve 22, the outlet end of the second check valve 22, and also enters the pipeline at the refrigerant-side inlet end of the third heat exchanger 8; after the two paths of refrigerant are mixed in the pipeline at the refrigerant-side inlet end of the third heat exchanger 8, they successively pass through the third heat exchanger 8, the third throttling mechanism 7, and the 53rd pipeline 53 to enter the 57th pipeline 57 and are divided into two paths again; the first path successively passes through the second throttling mechanism 5, the first heat exchanger 3, the 67th pipeline 67, the fourth commutation node 83 of the second four-way valve 80, and the low-pressure node 82 of the second four-way valve 80 to enter the 65th pipeline 65; the other path successively passes through the 57th pipeline 57, the first throttling mechanism 4, the second heat exchanger 6, the 64th pipeline 64, the second commutation node 73 of the first four-way valve 70, and the low-pressure node 72 of the first four-way valve 70, and also enters the 65th pipeline 65; after the two paths are mixed in the 65th pipeline 65, they pass through the 63rd pipeline 63, return to the inlet end of the compression mechanism 1, enter the compression mechanism 1 and are compressed, completing one cycle.

[0095] The hot water working process under this function is the same as that of the refrigeration and total heat recovery for hot water production function in this embodiment.

[0096] During the working processes of the above-mentioned refrigeration and total heat recovery for hot water production function, refrigeration and partial heat recovery for hot water production function, and simultaneously refrigerating and producing hot water according to user needs, when there is an air-conditioned room that needs heating, the first throttling mechanism 4 in the indoor terminal 20 is closed, the second heat exchanger 6 does not work, and the hot water reheater 2 in the indoor terminal 20 is used to heat the air-conditioned room, and the hot water regulating valve 12 in the indoor terminal 20 is used to control the dry bulb temperature of the indoor air. The above working method is applicable to the solutions described in all embodiments of the present invention.

[0097] (5) Heating function

[0098] In this function, the first heat exchanger 3 is an evaporator, which absorbs heat from the environment and uses the absorbed heat to produce hot water in the third heat exchanger 8; the second heat exchanger 6 does not work but is under evaporation pressure. During operation, the first throttling mechanism 4 is closed; the second throttling mechanism 5 works normally for refrigerant throttling; the third throttling mechanism 7 is fully open.

[0099] Under this function, the hot water reheater 2 in the indoor terminal 20 is used to heat the indoor air to supply heat to the air-conditioned room, and the hot water reheater 2 is used to control the dry-bulb temperature of the indoor air. During operation, the hot water pump 9 and the circulating water pump 10 are both operating normally; the hot water regulating valve 12 is also operating normally, which is used to adjust the hot water flow rate through the hot water reheater 2, so as to achieve the control of the indoor dry-bulb temperature.

[0100] Its refrigerant working process is as follows: After the refrigerant is discharged from the outlet end of the compression mechanism 1, it enters the sixtieth pipeline 60 and is divided into two paths; the first path sequentially passes through the high-pressure node 74 of the first four-way valve 70, the first commutation node 71 of the first four-way valve 70, the inlet end of the first check valve 21, the outlet end of the first check valve 21, and enters the refrigerant-side inlet pipeline of the third heat exchanger 8; the other path sequentially passes through the fifty-ninth pipeline 59, the high-pressure node 84 of the second four-way valve 80, the third commutation node 81 of the second four-way valve 80, the inlet end of the second check valve 22, the outlet end of the second check valve 22, and also enters the refrigerant-side inlet pipeline of the third heat exchanger 8; after the two paths of refrigerant are mixed in the refrigerant-side inlet pipeline of the third heat exchanger 8, they sequentially pass through the third heat exchanger 8, the third throttling mechanism 7, the fifty-third pipeline 53, the fifty-seventh pipeline 57, the second throttling mechanism 5, the first heat exchanger 3, the sixty-seventh pipeline 67, the fourth commutation node 83 of the second four-way valve 80, the low-pressure node 82 of the second four-way valve 80, the sixty-fifth pipeline 65, the sixty-third pipeline 63, return to the inlet end of the compression mechanism 1, enter the compression mechanism 1 and are compressed, completing one cycle.

[0101] The hot water working process under this function is the same as that of the refrigeration and full heat recovery for hot water production function of this embodiment. The difference is that under this function, the hot water reheater 2 in the indoor terminal 20 is used to heat the indoor air, not the reheating after cooling and dehumidification.

[0102] (6) Quick heating function

[0103] When the multi-connected air-conditioning equipment of the present utility model starts heating, since the room temperature of the air-conditioned room is relatively low, in order to improve the thermal comfort of the user, it is necessary to quickly raise the indoor air temperature to the required temperature. Therefore, under this function, the second heat exchanger 6 in the indoor terminal 20 is used to directly supply heat to the indoor, which is equivalent to a traditional multi-connected unit; but on the other hand, the third heat exchanger 8 is used to produce hot water. When the hot water in the hot water tank 30 reaches the heating requirement of the air-conditioned room, it is then switched to the heating function of this embodiment, and the hot water reheater 2 in the indoor terminal 20 is used to supply heat to the air-conditioned room.

[0104] Under this function, the first heat exchanger 3 is an evaporator that absorbs heat from the environment. Part of the absorbed heat is used to quickly heat the user through the second heat exchanger 6, and the other part is used to heat the hot water in the hot water tank 30 through the third heat exchanger 8. When working, the first throttling mechanism 4, the second throttling mechanism 5, and the third throttling mechanism 7 all work normally; the first throttling mechanism 4 and the third throttling mechanism 7 are respectively used to regulate the refrigerant flow rate through the second heat exchanger 6 and the third heat exchanger 8, and the second throttling mechanism 5 is used for refrigerant throttling. The hot water pump 9 works normally, and the circulating water pump 10 does not work; the hot water regulating valve 12 is closed, and the hot water reheater 2 in the indoor terminal 20 does not work.

[0105] The refrigerant working process under this function is as follows: After the refrigerant is discharged from the outlet end of the compression mechanism 1, it enters the sixtieth pipeline 60 and is divided into two paths; the first path successively passes through the fifty-ninth pipeline 59, the high-pressure node 84 of the second four-way valve 80, the third commutation node 81 of the second four-way valve 80, the inlet end of the second one-way valve 22, the outlet end of the second one-way valve 22, the refrigerant-side inlet end of the third heat exchanger 8, the refrigerant-side outlet end of the third heat exchanger 8, the third throttling mechanism 7, and the fifty-third pipeline 53, and enters the fifty-seventh pipeline 57; the other path successively passes through the high-pressure node 74 of the first four-way valve 70, the second commutation node 73 of the first four-way valve 70, the sixty-fourth pipeline 64, the second heat exchanger 6, and the first throttling mechanism 4, and also enters the fifty-seventh pipeline 57; after the two paths of refrigerant are mixed in the fifty-seventh pipeline 57, they successively pass through the second throttling mechanism 5, the first heat exchanger 3, the sixty-seventh pipeline 67, the fourth commutation node 83 of the second four-way valve 80, the low-pressure node 82 of the second four-way valve 80, the sixty-fifth pipeline 65, and the sixty-third pipeline 63, and return to the inlet end of the compression mechanism 1 and enter the compression mechanism 1 to be compressed, completing one cycle.

[0106] The hot water working process under this function is as follows: The hot water coming out of the hot water tank 30 successively passes through the inlet end of the high-temperature return water pipe 24, the outlet end of the high-temperature return water pipe 24, the suction end of the hot water pump 9, the discharge end of the hot water pump 9, and the water-side inlet end of the third heat exchanger 8, enters the third heat exchanger 8 to exchange heat with the refrigerant, absorbs heat and the temperature rises, and then successively passes through the water-side outlet end of the third heat exchanger 8, the inlet end of the high-temperature water supply pipe 23, and the outlet end of the high-temperature water supply pipe 23, and returns to the hot water tank 30 again.

[0107] (7) Winter defrosting function

[0108] When reverse cycle hot gas defrosting is adopted, that is, the second heat exchanger 6 is used to absorb heat from the room for defrosting the first heat exchanger 3. When working under this function, the first heat exchanger 3 is a condenser, and the heat absorbed from the room by the second heat exchanger 6 is used for defrosting. During operation, the third throttling mechanism 7 is closed and the third heat exchanger 8 does not work; the first throttling mechanism 4 works normally for refrigerant throttling; the second throttling mechanism 5 is fully open. To avoid the start and stop of the water pump during defrosting, the hot water pump 9 and the circulating water pump 10 both continue to work during defrosting, and the hot water regulating valve 12 also works normally to regulate the hot water flow through the hot water reheater 2, but the fan in the indoor terminal 20 stops running.

[0109] The refrigerant working process under this function is the same as the refrigeration function of this embodiment.

[0110] The hot water working process under this function is the same as the refrigeration and full heat recovery for hot water production function of this embodiment; the difference is that under this function, the hot water only passes through the hot water reheater 2 in the indoor terminal 20, and there is only a small amount of natural convection heat dissipation.

[0111] Under the heating function of this embodiment, the indoor terminal 20 heats the indoor air through the hot water reheater 2 therein to heat the air-conditioned room, which belongs to hot air heating; as is well known, the thermal comfort of hot air heating is not as good as that of hot water radiant heating; therefore, to improve the thermal comfort of winter heating users, floor radiant coils or capillary low-temperature hot water heating can be adopted. At this time, a heating manifold should be added to the system of this embodiment, and its connection method in the system is: the inlet end of the water distribution main pipe of the heating manifold is connected to the low-temperature supply pipe 25, and the outlet end of the water collection main pipe of the heating manifold is connected to the low-temperature return pipe 26; an electromagnetic valve is provided on the pipe connecting the inlet end of the water distribution main pipe of the heating manifold to the low-temperature supply pipe 25 or on the pipe connecting the outlet end of the water collection main pipe of the heating manifold to the low-temperature return pipe 26. This electromagnetic valve is closed under the refrigeration function, refrigeration and full heat recovery for hot water production function, refrigeration and partial heat recovery for hot water production function, and the function of simultaneously refrigerating and producing hot water according to user needs of this embodiment, and is opened under the heating function, rapid heating function, and winter defrosting function. At this time, under the heating function of this embodiment, the hot water reheater 2 and the second heat exchanger 6 in the indoor terminal 20 do not work, the hot water regulating valve 12 is closed, and the air-conditioned room is heated by floor radiant coils or capillary low-temperature hot water.

[0112] The above setting scheme and usage method of the heating manifold in the system are applicable to all the schemes described in Embodiments 1 to 4 of the present utility model.

[0113] Embodiment 2

[0114] As Figure 2As shown, this embodiment is also a multi-connected air conditioning device that can meet the requirements of independent temperature and humidity control; it is used in occasions with requirements for independent temperature and humidity control and domestic hot water. Compared with the solution shown in Embodiment 1 Figure 1 in the shown solution, a combined three-way regulating valve 32 is added to the entire device, and a domestic hot water heating coil 31 is added to the hot water tank 30.

[0115] The connection method of the combined three-way regulating valve 32 in the system is: the outlet of the combined three-way regulating valve 32 is connected to the inlet end of the high-temperature return water pipe 24, the direct current inlet 16 of the combined three-way regulating valve 32 is connected to the hot water tank 30, and the bypass inlet 15 of the combined three-way regulating valve 32 is connected to the high-temperature supply water pipe 23.

[0116] The inlet end 33 of the domestic hot water heating coil 31 is connected to the tap water pipe, and the outlet end 37 of the domestic hot water heating coil 31 is connected to an auxiliary heat source such as a wall-mounted gas furnace or a hot water electric heater; when the hot water temperature at the outlet of the domestic hot water heating coil 31 does not reach the usage requirement, the auxiliary heat source is used to continue heating.

[0117] This embodiment Figure 2 in the shown solution, the refrigerant working processes under the refrigeration function, the refrigeration and full heat recovery for domestic hot water production function, the refrigeration and partial heat recovery for domestic hot water production function, the function of simultaneously refrigerating and producing domestic hot water according to user needs, the heating function, the rapid heating function, and the winter defrosting function are the same as those in the solution shown in Embodiment 1 Figure 1 The hot water working process under its refrigeration and full heat recovery for domestic hot water production function is as follows.

[0118] (1) Under normal circumstances where the hot water temperature in the hot water tank 30 is not very low, the bypass inlet 15 of the combined three-way regulating valve 32 is closed, and the direct current inlet 16 of the combined three-way regulating valve 32 is fully opened.

[0119] At this time, the working process of the hot water on the high-temperature side is: the hot water coming out of the hot water tank 30 passes through the direct current inlet 16 of the combined three-way regulating valve 32, the outlet of the combined three-way regulating valve 32, and the inlet end of the high-temperature return water pipe 24 in sequence, enters the high-temperature return water pipe 24, mixes with the hot water that also enters the high-temperature return water pipe 24 from the outlet end of the low-temperature return water pipe 26, and then passes through the outlet end of the high-temperature return water pipe 24, the suction end of the hot water pump 9, the discharge end of the hot water pump 9, and the water side inlet end of the third heat exchanger 8 in sequence, enters the third heat exchanger 8 to exchange heat with the refrigerant, absorbs heat and the temperature rises, and then passes through the water side outlet end of the third heat exchanger 8, the inlet end of the high-temperature supply water pipe 23, and the outlet end of the high-temperature supply water pipe 23 in sequence, and returns to the hot water tank 30 again.

[0120] The working process of the hot water on the low-temperature side is divided into two parts. 1) For the indoor terminal 20 at the end of the most unfavorable loop of the system: The hot water coming out of the hot water tank 30 sequentially passes through the suction end of the circulation pump 10, the discharge end of the circulation pump 10, the inlet end of the low-temperature supply pipe 25, the outlet end of the low-temperature supply pipe 25, and the inlet end of the hot water reheater 2, and enters the hot water reheater 2 to exchange heat with the air cooled and dehumidified by the second heat exchanger 6, reheating the air. After the hot water releases heat and its temperature drops, it then sequentially passes through the outlet end of the hot water reheater 2, the inlet end of the hot water regulating valve 12, the outlet end of the hot water regulating valve 12, the inlet end of the low-temperature return pipe 26, and the outlet end of the low-temperature return pipe 26, and enters the high-temperature return pipe 24.

[0121] 2) For the hot water reheater 2 of other indoor terminals 20: The inlet end of the hot water reheater 2 is connected to the low-temperature supply pipe 25, and the outlet end of the hot water reheater 2 is sequentially connected to the inlet end of the hot water regulating valve 12 and the outlet end of the hot water regulating valve 12, and then connected to the low-temperature return pipe 26. During operation, driven by the circulation pump 10, the hot water also flows into these indoor terminals 20.

[0122] (2) When the temperature of the hot water in the hot water tank 30 is relatively low, since the third heat exchanger 8 cannot heat the hot water to the required temperature in one go at this time, the bypass inlet 15 of the confluence three-way regulating valve 32 is opened, and a part of the hot water in the high-temperature supply pipe 23 bypasses. After being mixed with another part of the hot water from the hot water tank 30 in the confluence three-way regulating valve 32, it is then sent into the third heat exchanger 8 for heating.

[0123] At this time, the working process of the hot water on the high-temperature side is as follows: A part of the hot water coming out of the hot water tank 30 enters the confluence three-way regulating valve 32 through the direct-current inlet 16 of the confluence three-way regulating valve 32; another part of the hot water from the high-temperature supply pipe 23 also enters the confluence three-way regulating valve 32 through the bypass inlet 15 of the confluence three-way regulating valve 32; after the two parts of hot water are mixed in the confluence three-way regulating valve 32, they then sequentially pass through the outlet of the confluence three-way regulating valve 32 and the inlet end of the high-temperature return pipe 24, enter the high-temperature return pipe 24, and after being mixed with the hot water from the outlet end of the low-temperature return pipe 26 that also enters the high-temperature return pipe 24, they then sequentially pass through the outlet end of the high-temperature return pipe 24, the suction end of the hot water pump 9, the discharge end of the hot water pump 9, and the water-side inlet end of the third heat exchanger 8, enter the third heat exchanger 8 to exchange heat with the refrigerant, absorb heat and the temperature rises, and then sequentially pass through the water-side outlet end of the third heat exchanger 8 and the inlet end of the high-temperature supply pipe 23, and enter the high-temperature supply pipe 23 and are divided into two parts; one part enters the bypass inlet 15 of the confluence three-way regulating valve 32, and the other part passes through the outlet end of the high-temperature supply pipe 23 and returns to the hot water tank 30.

[0124] The working process of the hot water on the low-temperature side is divided into two parts. 1) For the indoor terminal 20 at the end of the most unfavorable loop of the system: The hot water coming out of the hot water tank 30 sequentially passes through the suction end of the circulation pump 10, the discharge end of the circulation pump 10, the inlet end of the low-temperature supply pipe 25, the outlet end of the low-temperature supply pipe 25, and the inlet end of the hot water reheater 2, and enters the hot water reheater 2 to exchange heat with the air cooled and dehumidified by the second heat exchanger 6, reheating the air. After the hot water releases heat and its temperature drops, it then sequentially passes through the outlet end of the hot water reheater 2, the inlet end of the hot water regulating valve 12, the outlet end of the hot water regulating valve 12, the inlet end of the low-temperature return pipe 26, and the outlet end of the low-temperature return pipe 26, and enters the high-temperature return pipe 24.

[0125] For the hot water reheater 2 of other indoor terminals 20: The inlet end of the hot water reheater 2 is connected to the low-temperature supply pipe 25, and the outlet end of the hot water reheater 2 is sequentially connected to the inlet end of the hot water regulating valve 12 and the outlet end of the hot water regulating valve 12, and then connected to the low-temperature return pipe 26. During operation, driven by the circulation pump 10, the hot water also flows into these indoor terminals 20.

[0126] (3) When the system is just started and the temperature of the hot water in the hot water tank 30 is very low, in order to quickly make the temperature of the hot water sent to the hot water reheater 2 reach the use requirement and avoid prolonging the preheating time for the hot water to reach the use requirement due to the existence of the hot water tank 30, at this time, the bypass inlet 15 of the combined three-way regulating valve 32 is fully open, and the direct-flow inlet 16 of the combined three-way regulating valve 32 is closed.

[0127] At this time, the working process of the hot water on the high-temperature side is as follows: A part of the hot water in the high-temperature supply pipe 23 sequentially passes through the bypass inlet 15 of the combined three-way regulating valve 32, the outlet of the combined three-way regulating valve 32, and the inlet end of the high-temperature return pipe 24, and enters the high-temperature return pipe 24. After being mixed with the hot water that also enters the high-temperature return pipe 24 from the outlet end of the low-temperature return pipe 26, it then sequentially passes through the outlet end of the high-temperature return pipe 24, the suction end of the hot water pump 9, the discharge end of the hot water pump 9, and the water-side inlet end of the third heat exchanger 8, and enters the third heat exchanger 8 to exchange heat with the refrigerant. After absorbing heat and its temperature rises, it then sequentially passes through the water-side outlet end of the third heat exchanger 8 and the inlet end of the high-temperature supply pipe 23; it enters the high-temperature supply pipe 23 and is divided into two parts, one part enters the bypass inlet 15 of the combined three-way regulating valve 32, and the other part passes through the outlet end of the high-temperature supply pipe 23 and returns to the hot water tank 30.

[0128] The working process of the hot water on the low - temperature side is divided into two parts. 1) For the indoor terminal 20 at the end: The hot water coming out of the hot water tank 30 successively passes through the suction end of the circulation pump 10, the discharge end of the circulation pump 10, the inlet end of the low - temperature water supply pipe 25, the outlet end of the low - temperature water supply pipe 25, the inlet end of the hot water reheater 2, enters the hot water reheater 2 and exchanges heat with the air cooled and dehumidified by the second heat exchanger 6 to re - heat the air. After the hot water releases heat and its temperature drops, it then successively passes through the outlet end of the hot water reheater 2, the inlet end of the hot water regulating valve 12, the outlet end of the hot water regulating valve 12, the inlet end of the low - temperature return pipe 26, the outlet end of the low - temperature return pipe 26, and enters the high - temperature return pipe 24.

[0129] 2) For the hot water reheater 2 of other indoor terminals 20: The inlet end of the hot water reheater 2 is connected to the low - temperature water supply pipe 25, and the outlet end of the hot water reheater 2 is successively connected to the inlet end of the hot water regulating valve 12, the outlet end of the hot water regulating valve 12, and then to the low - temperature return pipe 26. During operation, driven by the circulation pump 10, the hot water also flows into these indoor terminals 20.

[0130] Under the functions of refrigeration and partial heat recovery for hot water production, and the function of refrigeration and hot water production simultaneously according to user needs in this embodiment, the hot water working process is the same as the hot water working process under the function of refrigeration and total heat recovery for hot water production in the above - described embodiment.

[0131] Under the heating function in this embodiment, the hot water working process is the same as the hot water working process under the function of refrigeration and total heat recovery for hot water production in this embodiment. The difference is that under the heating function, the hot water reheater 2 in the indoor terminal 20 is used to heat the indoor air, not for re - heating after cooling and dehumidification.

[0132] Under the winter defrosting function in this embodiment, the hot water working process is the same as the hot water working process under the function of refrigeration and total heat recovery for hot water production in this embodiment; the difference is that under the winter defrosting function, the hot water only passes through the hot water reheater 2 in the indoor terminal 20, and there is only a small amount of natural convection heat dissipation.

[0133] In this embodiment Figure 2 In the fast heating function of the scheme shown, the bypass inlet 15 of the confluence three - way regulating valve 32 is closed, while the direct - flow inlet 16 of the confluence three - way regulating valve 32 is fully open. Its hot water working process is: The hot water coming out of the hot water tank 30 successively passes through the direct - flow inlet 16 of the confluence three - way regulating valve 32, the outlet of the confluence three - way regulating valve 32, the inlet end of the high - temperature return pipe 24, the outlet end of the high - temperature return pipe 24, the suction end of the hot water pump 9, the discharge end of the hot water pump 9, the water - side inlet end of the third heat exchanger 8, enters the third heat exchanger 8 to exchange heat with the refrigerant, and after absorbing heat and its temperature rises, it then successively passes through the water - side outlet end of the third heat exchanger 8, the inlet end of the high - temperature water supply pipe 23, the outlet end of the high - temperature water supply pipe 23, and returns to the hot water tank 30.

[0134] In actual application, when the user has no need for domestic hot water heating, in this embodiment Figure 2 in the hot water tank 30 of the solution shown, the domestic hot water heating coil 31 may not be provided; this measure is also applicable to the solution shown in Embodiment 4 Figure 4 of the solution shown.

[0135] Embodiment 3

[0136] As Figure 3 shown, this embodiment is also a multi-connected air conditioning device that can meet the requirements of independent temperature and humidity control; it is used in occasions with independent temperature and humidity control requirements and domestic hot water. Compared with the solution shown in Embodiment 1 Figure 1 of the solution shown, an additional air conditioning manifold 40 is added to the entire device. The connection method of the air conditioning manifold 40 in the system is as follows: the inlet end of the water distribution main pipe 34 of the air conditioning manifold 40 is connected to the outlet end of the low-temperature water supply pipe 25, and the outlet end of the water collection main pipe 35 of the air conditioning manifold 40 is connected to the inlet end of the low-temperature return pipe 26; the branch outlet end of the water distribution main pipe 34 of the air conditioning manifold 40 is connected to the inlet end of the hot water reheater 2; the branch inlet end of the water collection main pipe 35 of the air conditioning manifold 40 is connected to the outlet end of the hot water reheater 2 through the hot water regulating valve 12.

[0137] In the actual application process, when the hot water regulating valve 12 is set at the inlet end of the hot water reheater 2, the connection method of the water distribution main pipe 34 and the water collection main pipe 35 of the air conditioning manifold 40 to the hot water reheater 2 is as follows: the branch outlet end of the water distribution main pipe 34 of the air conditioning manifold 40 is connected to the inlet end of the hot water reheater 2 through the hot water regulating valve 12; the branch inlet end of the water collection main pipe 35 of the air conditioning manifold 40 is connected to the outlet end of the hot water reheater 2.

[0138] The above connection method of the water distribution main pipe 34 and the water collection main pipe 35 of the air conditioning manifold 40 to the hot water reheater 2 is also applicable to the solutions described in Embodiments 4 and 6 of the present invention.

[0139] In engineering, the pipes connecting the water distribution main pipe 34 and the water collection main pipe 35 of the air conditioning manifold 40 to the hot water reheater 2 respectively can be buried in the floor cushion of the floor where they are located and in the side wall of the air-conditioned room.

[0140] This embodiment Figure 3 of the solution shown has the same refrigerant working process as the solution shown in Embodiment 1 under the refrigeration function, the refrigeration and full heat recovery for domestic hot water production function, the refrigeration and partial heat recovery for domestic hot water production function, the function of simultaneously refrigerating and producing domestic hot water according to user needs, the heating function, the rapid heating function, and the winter defrosting function. Its high-temperature side hot water working process under the above functions is also the same as the high-temperature side hot water working process of the corresponding functions of the solution shown in Embodiment 1 Figure 1 of the solution shown. Figure 1 of the solution shown.

[0141] This embodiment Figure 3 The low-temperature side hot water working process of the solution shown under the function of refrigeration and full heat recovery for hot water production is as follows: The hot water coming out of the hot water tank 30 passes through the suction end of the circulation water pump 10, the discharge end of the circulation water pump 10, the inlet end of the low-temperature water supply pipe 25, the outlet end of the low-temperature water supply pipe 25, and the inlet end of the water distribution main pipe 34 of the air-conditioning water collector and distributor 40 in sequence, and enters the water distribution main pipe 34 of the air-conditioning water collector and distributor 40 and is divided into multiple paths; the branch outlet end of the water distribution main pipe 34 of each path of the air-conditioning water collector and distributor 40 then passes through the inlet end of the hot water reheater 2, the outlet end of the hot water reheater 2, the inlet end of the hot water regulating valve 12, the outlet end of the hot water regulating valve 12, and the branch inlet end of the water collection main pipe 35 of the air-conditioning water collector and distributor 40 in sequence, enters the water collection main pipe 35 of the air-conditioning water collector and distributor 40, mixes with the hot water entering the water collection main pipe 35 from other branches, and then passes through the outlet end of the water collection main pipe 35 of the air-conditioning water collector and distributor 40, the inlet end of the low-temperature return pipe 26, and the outlet end of the low-temperature return pipe 26 in sequence, and returns to the hot water tank 30 again.

[0142] The above-mentioned this embodiment Figure 3 The low-temperature side hot water working process of the solution shown under the function of refrigeration and full heat recovery for hot water production is also applicable to this embodiment Figure 3 The low-temperature side hot water working process of the solution shown under the function of refrigeration and partial heat recovery for hot water production and the function of simultaneously refrigerating and producing hot water according to user needs.

[0143] The above-mentioned this embodiment Figure 3 The low-temperature side hot water working process of the solution shown under the function of refrigeration and full heat recovery for hot water production is also applicable to this embodiment Figure 3 The low-temperature side hot water working process of the solution shown under the heating function; the difference is that under the heating function of this embodiment, the hot water reheater 2 in the indoor terminal 20 is used to heat the indoor air, not the reheating after cooling and dehumidification.

[0144] The above-mentioned this embodiment Figure 3 The low-temperature side hot water working process of the solution shown under the function of refrigeration and full heat recovery for hot water production is also applicable to this embodiment Figure 3 The low-temperature side hot water working process of the solution shown under the winter defrosting function; the difference is that under the winter defrosting function of this embodiment, the hot water only passes through the hot water reheater 2 in the indoor terminal 20, and there is only a small amount of natural convection heat dissipation.

[0145] Similarly, under the heating function of this embodiment, the indoor terminal 20 heats the indoor air through the hot water reheater 2 therein to supply heat to the air-conditioned room, which belongs to hot air heating; as is well known, the thermal comfort of hot air heating is not as good as that of hot water radiant heating; therefore, in order to improve the thermal comfort of winter heating users, floor radiant coils or capillary low-temperature hot water heating can be adopted. At this time, in this embodiment Figure 3A heating manifold should be added to the system of the shown solution. In addition to the solution described in Embodiment 1, there are the following solutions for its connection method in the system:

[0146] 1) In this solution, at both ends of the water distribution main pipe 34 of the air-conditioning manifold 40, one end is the inlet end of the water distribution main pipe 34, and the other end is the outlet end of the water distribution main pipe 34; on the water distribution main pipe between the inlet end and the outlet end of the water distribution main pipe 34, a plurality of branch outlet ends are arranged; at both ends of the water collection main pipe 35 of the air-conditioning manifold 40, one end is the outlet end of the water collection main pipe 35, and the other end is the inlet end of the water collection main pipe 35; on the water collection main pipe between the outlet end and the inlet end of the water collection main pipe 35, a plurality of branch inlet ends are arranged. 2) The connection method of the heating manifold in the system is: the inlet end of the water distribution main pipe of the heating manifold is connected to the outlet end of the water distribution main pipe 34 of the air-conditioning manifold 40; the outlet end of the water collection main pipe of the heating manifold is connected to the inlet end of the water collection main pipe 35 of the air-conditioning manifold 40; the branch outlet end of the water distribution main pipe of the heating manifold is connected to the inlet end of the low-temperature hot water radiant coil, and the outlet end of the low-temperature hot water radiant coil is connected to the branch inlet end of the water collection main pipe of the heating manifold; a solenoid valve is provided on the pipe between the inlet end of the water distribution main pipe of the heating manifold and the outlet end of the water distribution main pipe 34 of the air-conditioning manifold 40, or on the pipe between the outlet end of the water collection main pipe of the heating manifold and the inlet end of the water collection main pipe 35 of the air-conditioning manifold 40; the solenoid valve is opened under the heating function, fast heating function, and winter defrosting function, and closed under other functions. 3) The inlet end of the water distribution main pipe 34 of the air-conditioning manifold 40 is connected to the outlet end of the low-temperature water supply pipe 25; the outlet end of the water collection main pipe 35 of the air-conditioning manifold 40 is connected to the inlet end of the low-temperature return pipe 26; when the hot water regulating valve 12 is set at the inlet end of the hot water reheater 2, the branch outlet end of the water distribution main pipe 34 of the air-conditioning manifold 40 is connected to the inlet end of the hot water reheater 2 through the hot water regulating valve 12; the branch inlet end of the water collection main pipe 35 of the air-conditioning manifold 40 is connected to the outlet end of the hot water reheater 2; when the hot water regulating valve 12 is set at the outlet end of the hot water reheater 2, the branch outlet end of the water distribution main pipe 34 of the air-conditioning manifold 40 is connected to the inlet end of the hot water reheater 2; the branch inlet end of the water collection main pipe 35 of the air-conditioning manifold 40 is connected to the outlet end of the hot water reheater 2 through the hot water regulating valve 12. Under the above connection method of the heating manifold in the system, a differential pressure controller and an electric two-way regulating valve should be provided between the inlet end of the water distribution main pipe 34 of the air-conditioning manifold 40 and the outlet end of the water collection main pipe 35 of the air-conditioning manifold 40.

[0147] The connection method of the differential pressure controller in the system is as follows: one end of the differential pressure controller is connected to the low-temperature supply water pipe 25 at the inlet end of the water distribution main pipe 34 of the air-conditioning water collector and distributor 40, and the other end of the differential pressure controller is connected to the low-temperature return water pipe 26 at the outlet end of the water collection main pipe 35 of the air-conditioning water collector and distributor 40.

[0148] The connection method of the electric two-way regulating valve in the system is as follows: one end of the electric two-way regulating valve is connected to the low-temperature supply water pipe 25 at the inlet end of the water distribution main pipe 34 of the air-conditioning water collector and distributor 40, and the other end of the electric two-way regulating valve is connected to the low-temperature return water pipe 26 at the outlet end of the water collection main pipe 35 of the air-conditioning water collector and distributor 40.

[0149] During the working process, the differential pressure controller is used to detect the actual differential pressure between the inlet end of the water distribution main pipe 34 of the air-conditioning water collector and distributor 40 and the outlet end of the water collection main pipe 35 of the air-conditioning water collector and distributor 40, and send it to the controller of the multi-split air-conditioning equipment for comparison with the expected value. According to the deviation value, a control signal is sent to regulate the opening degree of the electric two-way regulating valve, so as to control the actual differential pressure between the inlet end of the water distribution main pipe 34 of the air-conditioning water collector and distributor 40 and the outlet end of the water collection main pipe 35 of the air-conditioning water collector and distributor 40 to be the expected value.

[0150] The above-mentioned heating water collector and distributor in this embodiment Figure 3 The connection method and control method in the shown scheme are also applicable to the scheme described in Embodiment 4.

[0151] Embodiment 4

[0152] As Figure 4 shown, this embodiment is also a multi-split air-conditioning equipment that can meet the requirements of independent temperature and humidity control; it is used in occasions with requirements for independent temperature and humidity control and domestic hot water. Compared with the scheme shown in Embodiment 2 Figure 2 shown, an additional air-conditioning water collector and distributor 40 is added to the whole equipment. The connection method of the air-conditioning water collector and distributor 40 in the system is as follows: the inlet end of the water distribution main pipe 34 of the air-conditioning water collector and distributor 40 is connected to the outlet end of the low-temperature supply water pipe 25, and the outlet end of the water collection main pipe 35 of the air-conditioning water collector and distributor 40 is connected to the inlet end of the low-temperature return water pipe 26; the branch outlet end of the water distribution main pipe 34 of the air-conditioning water collector and distributor 40 is connected to the inlet end of the hot water reheater 2; the branch inlet end of the water collection main pipe 35 of the air-conditioning water collector and distributor 40 is connected to the outlet end of the hot water reheater 2 through the hot water regulating valve 12.

[0153] In the actual application process, when the hot water regulating valve 12 is set at the inlet end of the hot water reheater 2, the connection method of the water distribution main pipe 34 and the water collection main pipe 35 of the air-conditioning water collector and distributor 40 with the hot water reheater 2 is as follows: the branch outlet end of the water distribution main pipe 34 of the air-conditioning water collector and distributor 40 is connected to the inlet end of the hot water reheater 2 through the hot water regulating valve 12; the branch inlet end of the water collection main pipe 35 of the air-conditioning water collector and distributor 40 is connected to the outlet end of the hot water reheater 2.

[0154] In the project, the pipes connecting the header pipe 34 for distributing water and the header pipe 35 for collecting water of the air-conditioning water separator 40 to the hot water reheater 2 respectively can be buried in the cushion layer of the floor of the floor where they are located and in the side wall of the air-conditioned room.

[0155] This embodiment Figure 4 The refrigerant working processes of the scheme shown in the refrigeration function, the refrigeration and full heat recovery for producing hot water function, the refrigeration and partial heat recovery for producing hot water function, the function of refrigerating and producing hot water simultaneously according to user needs, the heating function, the rapid heating function, and the winter defrosting function are the same as those of Embodiment 1 Figure 1 The scheme shown. Its high-temperature side hot water working process in the above functions is the same as that of Embodiment 2 Figure 2 The high-temperature side hot water working process of the corresponding function of the scheme shown.

[0156] This embodiment Figure 4 The low-temperature side hot water working process of the scheme shown in this embodiment under the refrigeration and full heat recovery for producing hot water function is as follows: The hot water coming out of the hot water tank 30 passes through the suction end of the circulation pump 10, the discharge end of the circulation pump 10, the inlet end of the low-temperature water supply pipe 25, the outlet end of the low-temperature water supply pipe 25, and the inlet end of the header pipe 34 of the air-conditioning water separator 40 in sequence, and enters the header pipe 34 of the air-conditioning water separator 40 and is divided into multiple paths; the branch outlet end of the header pipe 34 of each path of the air-conditioning water separator 40 passes through the inlet end of the hot water reheater 2, the outlet end of the hot water reheater 2, the inlet end of the hot water regulating valve 12, the outlet end of the hot water regulating valve 12, and the branch inlet end of the header pipe 35 of the air-conditioning water separator 40 in sequence, enters the header pipe 35 of the air-conditioning water separator 40, is mixed with the hot water entering the header pipe 35 from other branches, and then passes through the outlet end of the header pipe 35 of the air-conditioning water separator 40, the inlet end of the low-temperature return pipe 26, and the outlet end of the low-temperature return pipe 26 in sequence, and flows into the high-temperature return pipe 24.

[0157] The above-mentioned this embodiment Figure 4 The low-temperature side hot water working process of the scheme shown in this embodiment under the refrigeration and full heat recovery for producing hot water function is also applicable to the low-temperature side hot water working process of the scheme shown in this embodiment Figure 4 Under the refrigeration and partial heat recovery for producing hot water function and the function of refrigerating and producing hot water simultaneously according to user needs of the scheme shown.

[0158] The above-mentioned this embodiment Figure 4 The low-temperature side hot water working process of the scheme shown in this embodiment under the refrigeration and full heat recovery for producing hot water function is also applicable to the low-temperature side hot water working process of the scheme shown in this embodiment Figure 4 The low-temperature side hot water working process of the scheme shown in the heating function; the difference is that in the heating function of this embodiment, the hot water reheater 2 in the indoor terminal 20 is used to heat the indoor air, not the reheating after cooling and dehumidification.

[0159] The above-mentioned this embodimentFigure 4 The low-temperature side hot water working process of the shown solution under the functions of refrigeration and total heat recovery for producing hot water is also applicable to this embodiment. Figure 4 The low-temperature side hot water working process of the shown solution under the winter defrosting function; the difference is that under the winter defrosting function of this embodiment, the hot water only passes through the hot water reheater 2 in the indoor terminal 20, and there is only a small amount of natural convection heat dissipation.

[0160] Embodiment 5

[0161] In the above-described Embodiments 1 to 4 Figures 1 to 4 There are a hot water pump 9 and a circulating water pump 10 in the hot water system of the shown solution, and their hot water systems belong to a secondary pump system; for Embodiment 1 Figure 1 For the hot water system of the shown solution, when the hot water tank 30 and the circulating water pump 10 in its hot water system are cancelled, a primary pump hot water system can be formed; at this time, the refrigerant system of the multi-connected air-conditioning equipment in this embodiment is still the same as Figure 1 the shown solution, but the connection method of the primary pump hot water system matching with this refrigerant system is as follows:

[0162] 1) The water side outlet end of the third heat exchanger 8 is successively connected to the inlet end of the high-temperature water supply pipe 23, the outlet of the high-temperature water supply pipe 23, and the inlet end of the hot water reheater 2 of the indoor terminal 20 at the end of the most unfavorable loop of the hot water system; the outlet end of the hot water reheater 2 of the indoor terminal 20 at the end of the most unfavorable loop of the hot water system is successively connected to the inlet end of the hot water regulating valve 12, the outlet end of the hot water regulating valve 12, the inlet end of the high-temperature water return pipe 24, the outlet end of the high-temperature water return pipe 24, the suction end of the hot water pump 9, and the pressure end of the hot water pump 9 and then connected to the water side inlet end of the third heat exchanger 8. 2) The connection method of the hot water reheater 2 of other indoor terminals 20 in the hot water system is: the inlet end of the hot water reheater 2 is connected to the high-temperature water supply pipe 23, and the outlet end of the hot water reheater 2 is successively connected to the inlet end of the hot water regulating valve 12 and the outlet end of the hot water regulating valve 12 and then connected to the high-temperature water return pipe 24. When working, the hot water flows into these indoor terminals 20 under the drive of the hot water pump 9.

[0163] When the hot water pump 9 is a fixed-frequency pump, a differential pressure control valve should be installed between the high-temperature water supply pipe 23 and the high-temperature water return pipe 24; when the hot water pump 9 is working, if only the hot water reheater 2 of some indoor terminals 20 is performing reheating or heating work, the excess hot water bypasses through this differential pressure control valve and enters the suction end of the hot water pump 9 to ensure the constant flow operation of the hot water pump 9. When all the hot water reheaters 2 of the indoor terminals 20 are performing reheating or heating work, this differential pressure control valve is closed.

[0164] When the hot water pump 9 is a fixed-frequency pump, in order to ensure that hot water is always circulating in the high-temperature water supply pipe 23 and the high-temperature water return pipe 24 to provide better thermal comfort for users, in actual applications, the differential pressure control valve can also be set between the high-temperature water supply pipe 23 and the high-temperature water return pipe 24 of the hot water reheater 2 at the end of the most unfavorable loop of the hot water system, i.e., the indoor terminal 20. At this time, the connection method of the differential pressure control valve in the hot water system is: one end of the differential pressure control valve is connected to the high-temperature water supply pipe 23 at the outlet end of the high-temperature water supply pipe 23, and the other end of the differential pressure control valve is connected to the high-temperature water return pipe 24 at the inlet end of the high-temperature water return pipe 24.

[0165] In actual applications, the hot water regulating valve 12 can also be set at the inlet end of the hot water reheater 2. At this time, the connection method of the hot water system in this embodiment is as follows: 1) The water side outlet end of the third heat exchanger 8 is connected to the inlet end of the hot water reheater 2 at the indoor terminal 20 at the end of the most unfavorable loop of the hot water system through the inlet end of the high-temperature water supply pipe 23, the outlet of the high-temperature water supply pipe 23, the inlet end of the hot water regulating valve 12, and the outlet end of the hot water regulating valve 12 in sequence. The outlet end of the hot water reheater 2 at the indoor terminal 20 at the end of the most unfavorable loop of the hot water system is connected to the water side inlet end of the third heat exchanger 8 through the inlet end of the high-temperature water return pipe 24, the outlet end of the high-temperature water return pipe 24, the suction end of the hot water pump 9, and the discharge end of the hot water pump 9 in sequence. 2) The connection method of the hot water reheater 2 of other indoor terminals 20 in the hot water system is: the inlet end of the hot water reheater 2 is connected to the high-temperature water supply pipe 23 through the outlet end of the hot water regulating valve 12 and the inlet end of the hot water regulating valve 12 in sequence, and the outlet end of the hot water reheater 2 is connected to the high-temperature water return pipe 24. During operation, hot water also flows into these indoor terminals 20 under the drive of the hot water pump 9.

[0166] During the actual operation process of the above-mentioned multi-connected air-conditioning equipment, the refrigeration function, the refrigeration and full heat recovery for hot water production function, the refrigeration and partial heat recovery for hot water production function, the function of simultaneously refrigerating and producing hot water according to user needs, the heating function, the rapid heating function, and the winter defrosting function of the solution in Embodiment 1 can also be achieved. Figure 1 And the refrigerant working process under its corresponding functions is the same as that of the solution shown in Embodiment 1. Figure 1 shown in the solution.

[0167] Similarly, under the heating function of this embodiment, the indoor terminal 20 heats the indoor air through the hot water reheater 2 therein to supply heat to the air-conditioned room, which belongs to hot air heating. As is well known, the thermal comfort of hot air heating is not as good as that of hot water radiant heating. Therefore, in order to improve the thermal comfort of users in winter heating, floor radiant coils or capillary low-temperature hot water heating can be adopted. At this time, a heating manifold should be added to the system of this embodiment, and its connection method in the system is as follows: the inlet end of the water supply main pipe of the heating manifold is connected to the high-temperature water supply pipe 23, and the outlet end of the water collection main pipe of the heating manifold is connected to the high-temperature return water pipe 24. An electromagnetic valve is provided on the pipe connecting the inlet end of the water supply main pipe of the heating manifold to the high-temperature water supply pipe 23 or on the pipe connecting the outlet end of the water collection main pipe of the heating manifold to the high-temperature return water pipe 24. This electromagnetic valve is closed under the refrigeration function, the refrigeration and full heat recovery for hot water production function, the refrigeration and partial heat recovery for hot water production function, and the function of simultaneously refrigerating and producing hot water according to user needs, and is opened under the heating function, the rapid heating function, and the winter defrosting function. The above-mentioned setting scheme and usage method of the heating manifold in the system are also applicable to all the schemes described in Embodiment 6 of the present utility model.

[0168] Embodiment 6

[0169] In the above-mentioned Embodiments 1 to 4 Figures 1 to 4 There are a hot water pump 9 and a circulating water pump 10 in the hot water systems of the described schemes, and their hot water systems belong to a secondary pump system. For Embodiment 3 Figure 3 In the hot water system of the described scheme, when the hot water tank 30 and the circulating water pump 10 in its hot water system are cancelled, a primary pump hot water system can be formed. At this time, the refrigerant system of the multi-connected air-conditioning equipment of this embodiment is still the same as Figure 3 the described scheme, but the connection method of the primary pump hot water system matched with this refrigerant system is as follows:

[0170] 1) The outlet end of the water side of the third heat exchanger 8 is successively connected to the inlet end of the high-temperature water supply pipe 23 and the outlet of the high-temperature water supply pipe 23, and then to the inlet end of the main water distribution pipe 34 of the air-conditioning water collector and distributor 40; the outlet end of the main water collection pipe 35 of the air-conditioning water collector and distributor 40 is successively connected to the inlet end of the high-temperature water return pipe 24, the outlet end of the high-temperature water return pipe 24, the suction end of the hot water pump 9, and the discharge end of the hot water pump 9, and then to the inlet end of the water side of the third heat exchanger 8; 2) When the hot water regulating valve 12 is arranged at the inlet end of the hot water reheater 2, the branch outlet end of the main water distribution pipe 34 of the air-conditioning water collector and distributor 40 is connected to the inlet end of the hot water reheater 2 through the hot water regulating valve 12; the branch inlet end of the main water collection pipe 35 of the air-conditioning water collector and distributor 40 is connected to the outlet end of the hot water reheater 2. When the hot water regulating valve 12 is arranged at the outlet end of the hot water reheater 2, the branch outlet end of the main water distribution pipe 34 of the air-conditioning water collector and distributor 40 is connected to the inlet end of the hot water reheater 2; the branch inlet end of the main water collection pipe 35 of the air-conditioning water collector and distributor 40 is connected to the outlet end of the hot water reheater 2 through the hot water regulating valve 12.

[0171] When the hot water pump 9 is a fixed-frequency pump, a differential pressure control valve should be installed between the high-temperature water supply pipe 23 at the inlet end of the main water distribution pipe 34 of the air-conditioning water collector and distributor 40 and the high-temperature water return pipe 24 at the outlet end of the main water collection pipe 35 of the air-conditioning water collector and distributor 40; when the hot water pump 9 is working, if only the hot water reheaters 2 of some indoor terminals 20 are performing reheating or heating operations, the excess hot water bypasses through this differential pressure control valve and enters the high-temperature water return pipe 24 to ensure the constant-flow operation of the hot water pump 9. When all the hot water reheaters 2 of the indoor terminals 20 are performing reheating or heating operations, this differential pressure control valve closes.

[0172] During the actual operation of the above-mentioned multi-split air-conditioning equipment, the implementation of Embodiment 3 can also be achieved. Figure 3 The refrigeration function, the refrigeration and full heat recovery for hot water production function, the refrigeration and partial heat recovery for hot water production function, the function of simultaneously refrigerating and producing hot water according to user needs, the heating function, the rapid heating function, and the winter defrosting function of the described solution; and the refrigerant working process under its corresponding functions is the same as that of the solution shown in Embodiment 3. Figure 3 shown in the solution.

[0173] Similarly, under the heating function of this embodiment, the indoor terminal 20 heats the indoor air through the hot water reheater 2 therein to heat the air-conditioning room, which belongs to hot air heating; as is well known, the thermal comfort of hot air heating is not as good as that of hot water radiant heating; therefore, to improve the thermal comfort of winter heating users, floor radiant coils or capillary low-temperature hot water heating can be adopted. At this time, a heating water collector and distributor should be added to the system of this embodiment. In addition to the solutions described in Embodiment 5 for its connection method in the system, there are also the following solutions:

[0174] 1) In this solution, at both ends of the water distribution main pipe 34 of the air conditioner water collector and distributor 40, one end is the inlet end of the water distribution main pipe 34, and the other end is the outlet end of the water distribution main pipe 34; on the water distribution main pipe between the inlet end of the water distribution main pipe 34 and the outlet end of the water distribution main pipe 34, a plurality of branch outlet ends are arranged; at both ends of the water collection main pipe 35 of the air conditioner water collector and distributor 40, one end is the outlet end of the water collection main pipe 35, and the other end is the inlet end of the water collection main pipe 35; on the water collection main pipe between the outlet end of the water collection main pipe 35 and the inlet end of the water collection main pipe 35, a plurality of branch inlet ends are arranged. 2) The connection method of the heating water collector and distributor in the system is: the inlet end of the water distribution main pipe of the heating water collector and distributor is connected to the outlet end of the water distribution main pipe 34 of the air conditioner water collector and distributor 40; the outlet end of the water collection main pipe of the heating water collector and distributor is connected to the inlet end of the water collection main pipe 35 of the air conditioner water collector and distributor 40; the branch outlet end of the water distribution main pipe of the heating water collector and distributor is connected to the inlet end of the low-temperature hot water radiant coil, and the outlet end of the low-temperature hot water radiant coil is connected to the branch inlet end of the water collection main pipe of the heating water collector and distributor; on the pipeline between the inlet end of the water distribution main pipe of the heating water collector and distributor and the outlet end of the water distribution main pipe 34 of the air conditioner water collector and distributor 40, or on the pipeline between the outlet end of the water collection main pipe of the heating water collector and distributor and the inlet end of the water collection main pipe 35 of the air conditioner water collector and distributor 40, a solenoid valve is provided; the solenoid valve is opened under the heating function, fast heating function, and winter defrosting function, and is closed under other functions. 3) The inlet end of the water distribution main pipe 34 of the air conditioner water collector and distributor 40 described above is connected to the outlet end of the high-temperature water supply pipe 23; the outlet end of the water collection main pipe 35 of the air conditioner water collector and distributor 40 is connected to the inlet end of the high-temperature return pipe 24. Under the above connection method of the heating water collector and distributor, a differential pressure controller and an electric two-way regulating valve should be provided between the inlet end of the water distribution main pipe 34 of the air conditioner water collector and distributor 40 and the outlet end of the water collection main pipe 35 of the air conditioner water collector and distributor 40.

[0175] The connection method of the differential pressure controller in the system is: one end of the differential pressure controller is connected to the high-temperature water supply pipe 23 at the inlet end of the water distribution main pipe 34 of the air conditioner water collector and distributor 40, and the other end of the differential pressure controller is connected to the high-temperature return pipe 24 at the outlet end of the water collection main pipe 35 of the air conditioner water collector and distributor 40.

[0176] The connection method of the electric two-way regulating valve in the system is: one end of the electric two-way regulating valve is connected to the high-temperature water supply pipe 23 at the inlet end of the water distribution main pipe 34 of the air conditioner water collector and distributor 40, and the other end of the electric two-way regulating valve is connected to the high-temperature return pipe 24 at the outlet end of the water collection main pipe 35 of the air conditioner water collector and distributor 40.

[0177] During the working process, a differential pressure controller is used to detect the actual differential pressure between the inlet end of the water distribution main pipe 34 of the air conditioner water collector 40 and the outlet end of the water collection main pipe 35 of the air conditioner water collector 40, and send it into the controller of the multi-connected air conditioner equipment for comparison with the expected value. According to the deviation value, a control signal is issued to regulate the opening degree of the electric two-way regulating valve, so as to control the actual differential pressure between the inlet end of the water distribution main pipe 34 of the air conditioner water collector 40 and the outlet end of the water collection main pipe 35 of the air conditioner water collector 40 to be the expected value.

[0178] In all the above embodiments of the present invention, the hot water regulating valve 12 can be arranged at the inlet end of the hot water reheater 2, or the hot water regulating valve 12 is arranged at the inlet end of the hot water reheater 2.

[0179] In all the above embodiments of the present invention, the hot water pump 9 can also be arranged at the water side outlet end of the third heat exchanger 8; at this time, the suction end of the hot water pump 9 is connected to the water side outlet end of the third heat exchanger 8, and the pressure outlet end of the hot water pump 9 is connected to the inlet end of the high-temperature water supply pipe 23.

[0180] In all the above embodiments of the present invention, the circulating water pump 10 can also be arranged at the outlet end of the low-temperature return water pipe 26; at this time, the suction end of the circulating water pump 10 is connected to the outlet end of the low-temperature return water pipe 26, and the pressure outlet end of the circulating water pump 10 is connected to the inlet end of the hot water tank 30.

Claims

1. A multi-connected air conditioning device, comprising a compression mechanism (1), a first four-way valve (70), a second four-way valve (80), a first heat exchanger (3), a third heat exchanger (8), a second throttling mechanism (5), a third throttling mechanism (7), a first check valve (21) and a second check valve (22), characterized in that: The multi-connected air conditioning equipment further includes at least two groups of indoor terminals (20); the indoor terminal (20) is composed of a second heat exchanger (6), a hot water reheater (2), and a first throttling mechanism (4); along the flow direction of the air processed by the indoor terminal (20), the second heat exchanger (6) is on the upstream side of the processed air, and the hot water reheater (2) is on the downstream side of the processed air; The inlet end of the hot water reheater (2) is connected to the water side outlet end of the third heat exchanger (8) through a high-temperature water supply pipe (23), and the outlet end of the hot water reheater (2) is connected to the water side inlet end of the third heat exchanger (8) through a high-temperature water return pipe (24); One end of the second heat exchanger (6) is connected to the second commutation node (73) of the two commutation nodes of the first four-way valve (70) through a sixty-fourth pipe (64), and the other end of the second heat exchanger (6) passes through the first throttling mechanism (4), a fifty-seventh pipe (57), a second throttling mechanism (5), a first heat exchanger (3), and a sixty-seventh pipe (67) in sequence and is connected to the fourth commutation node (83) of the two commutation nodes of the second four-way valve (80); The third commutation node (81) of the second four-way valve (80) is connected to the first commutation node (71) of the first four-way valve (70) through the inlet end of the second check valve (22), the outlet end of the second check valve (22), the outlet end of the first check valve (21), and the inlet end of the first check valve (21) in sequence; The refrigerant side inlet end of the third heat exchanger (8) is connected to the pipe between the outlet end of the second check valve (22) and the outlet end of the first check valve (21), and the refrigerant side outlet end of the third heat exchanger (8) is connected to the fifty-seventh pipe (57) through a third throttling mechanism (7) and a fifty-third pipe (53) in sequence; The low-pressure node (72) of the first four-way valve is connected to the low-pressure node (82) of the second four-way valve through a sixty-fifth pipe (65), the high-pressure node (74) of the first four-way valve passes through a sixtieth pipe (60), the outlet end of the compression mechanism (1), the inlet end of the compression mechanism (1), and a sixty-third pipe (63) in sequence and is connected to the sixty-fifth pipe (65) between the low-pressure node (72) of the first four-way valve and the low-pressure node (82) of the second four-way valve, and the high-pressure node (84) of the second four-way valve is connected to the sixtieth pipe (60) between the outlet end of the compression mechanism (1) and the high-pressure node (74) of the first four-way valve through a fifty-ninth pipe (59).

2. A multi-connected air conditioning device, comprising a compression mechanism (1), a first four-way valve (70), a second four-way valve (80), a first heat exchanger (3), a third heat exchanger (8), a second throttling mechanism (5), a third throttling mechanism (7), a first check valve (21) and a second check valve (22), characterized in that: The multi-connected air conditioning equipment further includes an air conditioning manifold (40) and at least two groups of indoor terminals (20); the indoor terminal (20) is composed of a second heat exchanger (6), a hot water reheater (2), and a first throttling mechanism (4); along the flow direction of the air processed by the indoor terminal (20), the second heat exchanger (6) is on the upstream side of the processed air, and the hot water reheater (2) is on the downstream side of the processed air; The inlet end of the hot water reheater (2) is connected to the branch outlet end of the water distribution main pipe (34) of the air conditioner manifold (40), and the outlet end of the hot water reheater (2) is connected to the branch inlet end of the water collection main pipe (35) of the air conditioner manifold (40); The inlet end of the water distribution main pipe (34) of the air conditioner manifold (40) is sequentially connected to the water side outlet end of the third heat exchanger (8) through the outlet end of the high-temperature water supply pipe (23) and the inlet end of the high-temperature water supply pipe (23), and the outlet end of the water collection main pipe (35) of the air conditioner manifold (40) is sequentially connected to the water side inlet end of the third heat exchanger (8) through the inlet end of the high-temperature return water pipe (24) and the outlet end of the high-temperature return water pipe (24); One end of the second heat exchanger (6) is connected to the second commutation node (73) of the two commutation nodes of the first four-way valve (70) through the sixty-fourth pipe (64), and the other end of the second heat exchanger (6) is sequentially connected to the fourth commutation node (83) of the two commutation nodes of the second four-way valve (80) through the first throttling mechanism (4), the fifty-seventh pipe (57), the second throttling mechanism (5), the first heat exchanger (3), and the sixty-seventh pipe (67); The third commutation node (81) of the second four-way valve (80) is sequentially connected to the first commutation node (71) of the first four-way valve (70) through the inlet end of the second check valve (22), the outlet end of the second check valve (22), the outlet end of the first check valve (21), and the inlet end of the first check valve (21); The refrigerant side inlet end of the third heat exchanger (8) is connected to the pipe between the outlet ends of the second check valve (22) and the first check valve (21), and the refrigerant side outlet end of the third heat exchanger (8) is sequentially connected to the fifty-seventh pipe (57) through the third throttling mechanism (7) and the fifty-third pipe (53); The low-pressure node (72) of the first four-way valve is connected to the low-pressure node (82) of the second four-way valve through the sixty-fifth pipe (65), the high-pressure node (74) of the first four-way valve is sequentially connected to the sixty-fifth pipe (65) between the low-pressure node (72) of the first four-way valve and the low-pressure node (82) of the second four-way valve through the sixtieth pipe (60), the outlet end of the compression mechanism (1), the inlet end of the compression mechanism (1), and the sixty-third pipe (63), and the high-pressure node (84) of the second four-way valve is connected to the sixtieth pipe (60) between the outlet end of the compression mechanism (1) and the high-pressure node (74) of the first four-way valve through the fifty-ninth pipe (59).

3. The multi-connected air conditioning apparatus according to any one of claims 1 to 2, characterized in that The inlet end of the water distribution main pipe of a heating manifold is connected to the high-temperature water supply pipe (23), and the outlet end of the water collection main pipe of the heating manifold is connected to the high-temperature return water pipe (24).

4. A multi-connected air conditioning device, comprising a compression mechanism (1), a first four-way valve (70), a second four-way valve (80), a first heat exchanger (3), a third heat exchanger (8), a second throttling mechanism (5), a third throttling mechanism (7), a first check valve (21) and a second check valve (22), characterized in that: The multi-connected air conditioning equipment further includes a hot water tank (30) and at least two groups of indoor terminals (20); the indoor terminal (20) is composed of a second heat exchanger (6), a hot water reheater (2), and a first throttling mechanism (4); along the flow direction of the air processed by the indoor terminal (20), the second heat exchanger (6) is on the upwind side of the processed air, and the hot water reheater (2) is on the downwind side of the processed air; The inlet end of the hot water reheater (2) is connected to the hot water tank (30) through a low-temperature water supply pipe (25), and the outlet end of the hot water reheater (2) is also connected to the hot water tank (30) through a low-temperature water return pipe (26); The water-side inlet end of the third heat exchanger (8) is connected to the hot water tank (30) through the outlet end of the high-temperature water return pipe (24) and the inlet end of the high-temperature water return pipe (24) in sequence; The water-side outlet end of the third heat exchanger (8) is connected to the hot water tank (30) through the inlet end of the high-temperature water supply pipe (23) and the outlet end of the high-temperature water supply pipe (23) in sequence; One end of the second heat exchanger (6) is connected to the second commutation node (73) of the two commutation nodes of the first four-way valve (70) through the sixty-fourth pipeline (64), and the other end of the second heat exchanger (6) passes through the first throttling mechanism (4), the fifty-seventh pipeline (57), the second throttling mechanism (5), the first heat exchanger (3), and the sixty-seventh pipeline (67) to the fourth commutation node (83) of the two commutation nodes of the second four-way valve (80) in sequence; The third commutation node (81) of the second four-way valve (80) is connected to the first commutation node (71) of the first four-way valve (70) through the inlet end of the second check valve (22), the outlet end of the second check valve (22), the outlet end of the first check valve (21), and the inlet end of the first check valve (21) in sequence; The refrigerant-side inlet end of the third heat exchanger (8) is connected to the pipeline between the outlet end of the second check valve (22) and the outlet end of the first check valve (21), and the refrigerant-side outlet end of the third heat exchanger (8) is connected to the fifty-seventh pipeline (57) through the third throttling mechanism (7) and the fifty-third pipeline (53) in sequence; The low-pressure node (72) of the first four-way valve is connected to the low-pressure node (82) of the second four-way valve through the sixty-fifth pipeline (65), and the high-pressure node (74) of the first four-way valve passes through the sixtieth pipeline (60), the outlet end of the compression mechanism (1), the inlet end of the compression mechanism (1), and the sixty-third pipeline (63) to the sixty-fifth pipeline (65) between the low-pressure node (72) of the first four-way valve and the low-pressure node (82) of the second four-way valve, and the high-pressure node (84) of the second four-way valve is connected to the sixtieth pipeline (60) between the outlet end of the compression mechanism (1) and the high-pressure node (74) of the first four-way valve through the fifty-ninth pipeline (59).

5. A multi-connected air conditioning device, comprising a compression mechanism (1), a first four-way valve (70), a second four-way valve (80), a first heat exchanger (3), a third heat exchanger (8), a second throttling mechanism (5), a third throttling mechanism (7), a first check valve (21) and a second check valve (22), characterized in that: The multi-connected air conditioning equipment further includes a hot water tank (30), an air conditioning header (40), and at least two groups of indoor terminals (20); the indoor terminal (20) is composed of a second heat exchanger (6), a hot water reheater (2), and a first throttling mechanism (4); along the flow direction of the air processed by the indoor terminal (20), the second heat exchanger (6) is on the upstream side of the air to be processed, and the hot water reheater (2) is on the downstream side of the air to be processed; The inlet end of the hot water reheater (2) is connected to the branch outlet end of the water distribution main pipe (34) of the air conditioning header (40), and the outlet end of the hot water reheater (2) is connected to the branch inlet end of the water collection main pipe (35) of the air conditioning header (40); The inlet end of the water distribution main pipe (34) of the air conditioning header (40) is connected to the hot water tank (30) through the outlet end and the inlet end of the low-temperature water supply pipe (25) in sequence, and the outlet end of the water collection main pipe (35) of the air conditioning header (40) is also connected to the hot water tank (30) through the inlet end and the outlet end of the low-temperature water return pipe (26) in sequence; The water-side inlet end of the third heat exchanger (8) is connected to the hot water tank (30) through the outlet end and the inlet end of the high-temperature water return pipe (24) in sequence; The water-side outlet end of the third heat exchanger (8) is connected to the hot water tank (30) through the inlet end and the outlet end of the high-temperature water supply pipe (23) in sequence; One end of the second heat exchanger (6) is connected to the second commutation node (73) of the two commutation nodes of the first four-way valve (70) through the sixty-fourth pipeline (64), and the other end of the second heat exchanger (6) is connected to the fourth commutation node (83) of the two commutation nodes of the second four-way valve (80) through the first throttling mechanism (4), the fifty-seventh pipeline (57), the second throttling mechanism (5), the first heat exchanger (3), and the sixty-seventh pipeline (67) in sequence; The third commutation node (81) of the second four-way valve (80) is connected to the first commutation node (71) of the first four-way valve (70) through the inlet end and the outlet end of the second check valve (22), the outlet end and the inlet end of the first check valve (21) in sequence; The refrigerant-side inlet end of the third heat exchanger (8) is connected to the pipeline between the outlet ends of the second check valve (22) and the first check valve (21), and the refrigerant-side outlet end of the third heat exchanger (8) is connected to the fifty-seventh pipeline (57) through the third throttling mechanism (7) and the fifty-third pipeline (53) in sequence; The low-pressure node (72) of the first four-way valve is connected to the low-pressure node (82) of the second four-way valve through the sixty-fifth pipeline (65). The high-pressure node (74) of the first four-way valve is successively connected to the sixty-fifth pipeline (65) between the low-pressure node (72) of the first four-way valve and the low-pressure node (82) of the second four-way valve through the sixtieth pipeline (60), the outlet end of the compression mechanism (1), the inlet end of the compression mechanism (1), and the sixty-third pipeline (63). The high-pressure node (84) of the second four-way valve is connected to the sixtieth pipeline (60) between the outlet end of the compression mechanism (1) and the high-pressure node (74) of the first four-way valve through the fifty-ninth pipeline (59).

6. A multi-connected air conditioning device, comprising a compression mechanism (1), a first four-way valve (70), a second four-way valve (80), a first heat exchanger (3), a third heat exchanger (8), a second throttling mechanism (5), a third throttling mechanism (7), a first check valve (21) and a second check valve (22), characterized in that: The multi-connected air-conditioning equipment further includes a hot water tank (30), a confluence three-way regulating valve (32), and at least two groups of indoor terminals (20); the indoor terminal (20) is composed of a second heat exchanger (6), a hot water reheater (2), and a first throttling mechanism (4); along the flow direction of the air processed by the indoor terminal (20), the second heat exchanger (6) is on the upwind side of the processed air, and the hot water reheater (2) is on the downwind side of the processed air; One end of the second heat exchanger (6) is connected to the second commutation node (73) of the two commutation nodes of the first four-way valve (70) through the sixty-fourth pipeline (64). The other end of the second heat exchanger (6) is successively connected to the fourth commutation node (83) of the two commutation nodes of the second four-way valve (80) through the first throttling mechanism (4), the fifty-seventh pipeline (57), the second throttling mechanism (5), the first heat exchanger (3), and the sixty-seventh pipeline (67); The third commutation node (81) of the second four-way valve (80) is successively connected to the first commutation node (71) of the first four-way valve (70) through the inlet end of the second check valve (22), the outlet end of the second check valve (22), the outlet end of the first check valve (21), and the inlet end of the first check valve (21); The refrigerant-side inlet end of the third heat exchanger (8) is connected to the pipeline between the outlet end of the second check valve (22) and the outlet end of the first check valve (21). The refrigerant-side outlet end of the third heat exchanger (8) is successively connected to the fifty-seventh pipeline (57) through the third throttling mechanism (7) and the fifty-third pipeline (53); The low-pressure node (72) of the first four-way valve is connected to the low-pressure node (82) of the second four-way valve through the sixty-fifth pipeline (65). The high-pressure node (74) of the first four-way valve is successively connected to the sixty-fifth pipeline (65) between the low-pressure node (72) of the first four-way valve and the low-pressure node (82) of the second four-way valve through the sixtieth pipeline (60), the outlet end of the compression mechanism (1), the inlet end of the compression mechanism (1), and the sixty-third pipeline (63). The high-pressure node (84) of the second four-way valve is connected to the sixtieth pipeline (60) between the outlet end of the compression mechanism (1) and the high-pressure node (74) of the first four-way valve through the fifty-ninth pipeline (59); The water-side outlet end of the third heat exchanger (8) is connected to the hot water tank (30) successively through the inlet end of the high-temperature water supply pipe (23) and the outlet end of the high-temperature water supply pipe (23). The water-side inlet end of the third heat exchanger (8) is connected to the hot water tank (30) successively through the outlet end of the high-temperature return water pipe (24), the inlet end of the high-temperature return water pipe (24), the outlet of the combined three-way regulating valve (32), and the direct-current inlet (16) of the combined three-way regulating valve (32). The bypass inlet (15) of the combined three-way regulating valve (32) is connected to the high-temperature water supply pipe (23). The inlet end of the hot water reheater (2) is connected to the hot water tank (30) through a low-temperature water supply pipe (25). The outlet end of the hot water reheater (2) is connected to the high-temperature return water pipe (24) between the water-side inlet end of the third heat exchanger (8) and the outlet of the combined three-way regulating valve (32) through a low-temperature return water pipe (26).

7. A multi-connected air conditioning device, comprising a compression mechanism (1), a first four-way valve (70), a second four-way valve (80), a first heat exchanger (3), a third heat exchanger (8), a second throttling mechanism (5), a third throttling mechanism (7), a first check valve (21) and a second check valve (22), characterized in that: The multi-connected air-conditioning equipment further includes a hot water tank (30), a combined three-way regulating valve (32), an air-conditioning water collector and distributor (40), and at least two groups of indoor terminals (20). The indoor terminal (20) is composed of a second heat exchanger (6), a hot water reheater (2), and a first throttling mechanism (4). Along the flowing direction of the air processed by the indoor terminal (20), the second heat exchanger (6) is on the upwind side of the processed air, and the hot water reheater (2) is on the downwind side of the processed air. One end of the second heat exchanger (6) is connected to the second commutation node (73) of the two commutation nodes of the first four-way valve (70) through a sixty-fourth pipeline (64). The other end of the second heat exchanger (6) is successively connected to the fourth commutation node (83) of the two commutation nodes of the second four-way valve (80) through the first throttling mechanism (4), a fifty-seventh pipeline (57), a second throttling mechanism (5), a first heat exchanger (3), and a sixty-seventh pipeline (67). The third commutation node (81) of the second four-way valve (80) is successively connected to the first commutation node (71) of the first four-way valve (70) through the inlet end of the second check valve (22), the outlet end of the second check valve (22), the outlet end of the first check valve (21), and the inlet end of the first check valve (21). The refrigerant-side inlet end of the third heat exchanger (8) is connected to the pipeline between the outlet end of the second check valve (22) and the outlet end of the first check valve (21). The refrigerant-side outlet end of the third heat exchanger (8) is successively connected to the fifty-third pipeline (53) through the third throttling mechanism (7) and is connected to the fifty-seventh pipeline (57). The low-pressure node (72) of the first four-way valve is connected to the low-pressure node (82) of the second four-way valve through the sixty-fifth pipeline (65). The high-pressure node (74) of the first four-way valve is successively connected to the sixty-fifth pipeline (65) between the low-pressure node (72) of the first four-way valve and the low-pressure node (82) of the second four-way valve through the sixtieth pipeline (60), the outlet end of the compression mechanism (1), the inlet end of the compression mechanism (1), and the sixty-third pipeline (63). The high-pressure node (84) of the second four-way valve is connected to the sixtieth pipeline (60) between the outlet end of the compression mechanism (1) and the high-pressure node (74) of the first four-way valve through the fifty-ninth pipeline (59). The water-side outlet end of the third heat exchanger (8) is successively connected to the hot water tank (30) through the inlet end of the high-temperature water supply pipe (23) and the outlet end of the high-temperature water supply pipe (23). The water-side inlet end of the third heat exchanger (8) is successively connected to the hot water tank (30) through the outlet end of the high-temperature return water pipe (24), the inlet end of the high-temperature return water pipe (24), the outlet of the combined three-way regulating valve (32), and the direct-current inlet (16) of the combined three-way regulating valve (32). The bypass inlet (15) of the combined three-way regulating valve (32) is connected to the high-temperature water supply pipe (23). The inlet end of the hot water reheater (2) is connected to the branch outlet end of the water distribution main pipe (34) of the air-conditioning header (40), and the outlet end of the hot water reheater (2) is connected to the branch inlet end of the water collection main pipe (35) of the air-conditioning header (40). The inlet end of the water distribution main pipe (34) of the air-conditioning header (40) is successively connected to the hot water tank (30) through the outlet end of the low-temperature water supply pipe (25) and the inlet end of the low-temperature water supply pipe (25). The outlet end of the water collection main pipe (35) of the air-conditioning header (40) is successively connected to the high-temperature return water pipe (24) between the water-side inlet end of the third heat exchanger (8) and the outlet of the combined three-way regulating valve (32) through the inlet end of the low-temperature return water pipe (26) and the outlet end of the low-temperature return water pipe (26).

8. The multi-connected air conditioning equipment according to any one of claims 1 to 2, 4 to 7, characterized in that A hot water regulating valve (12) is provided on the pipeline at the inlet end or the outlet end of the hot water reheater (2).

9. The multi-connected air conditioning equipment according to any one of claims 2, 5, and 7, characterized in that The inlet end of the water distribution main pipe of a heating header is connected to the inlet end of the water distribution main pipe (34) of the air-conditioning header (40) through the outlet end of the water distribution main pipe (34) of the air-conditioning header (40). The outlet end of the water collection main pipe of the heating header is connected to the outlet end of the water collection main pipe (35) of the air-conditioning header (40) through the inlet end of the water collection main pipe (35) of the air-conditioning header (40).

10. The multi-connected air conditioning equipment according to any one of claims 4 to 7, characterized in that The inlet end of the water distribution main pipe of a heating header is connected to the low-temperature water supply pipe (25), and the outlet end of the water collection main pipe of the heating header is connected to the low-temperature return water pipe (26).

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