Fresh air conditioning system

Abstract

The utility model relates to a fresh air conditioning system. The fresh air conditioning system comprises a water chilling unit and a fresh air conditioning unit, the fresh air handling unit comprises a hot plate; the first condenser communicates with the hot plate to form a first heat supply circulation path. According to the fresh air conditioning system, heat generated in the working process of the water chilling unit can be recycled, and energy consumption can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to a fresh air conditioning system. BACKGROUND

[0002] The existing fresh air conditioning system usually comprises a fresh air unit and a cold water unit, the cold water unit is mainly used for cooling the cold plate of the fresh air unit, and the heat generated during the operation of the cold water unit cannot be recycled, resulting in waste of heat and high energy consumption of the fresh air conditioning system. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide a fresh air conditioning system capable of recycling the heat generated during the operation of the cold water unit and reducing energy consumption.

[0004] A fresh air conditioning system, comprising:

[0005] a cold water unit comprising a first condenser;

[0006] a fresh air unit comprising a hot plate;

[0007] The first condenser and the hot plate are in communication to form a first heat supply circulation path.

[0008] In some embodiments, the fresh air conditioning system further comprises a heat pump unit, the heat pump unit comprising a second condenser, the second condenser being in communication with the hot plate to form a second heat supply circulation path.

[0009] In some embodiments, the fresh air conditioning system further comprises a return water pipeline assembly, the return water pipeline assembly comprising a return water main pipe, a first return water branch pipe and a second return water branch pipe, the return water main pipe being located on the first heat supply circulation path and the second heat supply circulation path and being in communication with the outlet of the hot plate, the first return water branch pipe being located on the first heat supply circulation path and being in communication between the return water main pipe and the inlet of the first condenser, the second return water branch pipe being located on the second heat supply circulation path and being in communication between the return water main pipe and the inlet of the second condenser.

[0010] The fresh air conditioning system further comprises a water supply pipeline assembly, the water supply pipeline assembly comprising a water supply main pipe, a first water supply branch pipe and a second water supply branch pipe, the first water supply branch pipe being located on the first heat supply circulation path and being in communication between the outlet of the first condenser and the water supply main pipe, the second water supply branch pipe being located on the second heat supply circulation path and being in communication between the outlet of the second condenser and the water supply main pipe, the water supply main pipe being located on the first heat supply circulation path and the second heat supply circulation path and being in communication with the inlet of the hot plate.

[0011] In some embodiments, the return water pipe assembly further comprises a first return water valve and a second return water valve, the first return water valve is connected to the first return water branch pipe and is used to open and close the first return water branch pipe, the second return water valve is connected to the second return water branch pipe and is used to open and close the second return water branch pipe.

[0012] The water supply pipe assembly further comprises a first water supply valve and a second water supply valve, the first water supply valve is connected to the first water supply branch pipe and is used to open and close the first water supply branch pipe, the second water supply valve is connected to the second water supply branch pipe and is used to open and close the second water supply branch pipe.

[0013] In some embodiments, the fresh air air conditioning system further comprises a cooling tower, the first condenser and the cooling tower form a first refrigeration cycle path, and the second condenser and the cooling tower form a second refrigeration cycle path.

[0014] In some embodiments, the fresh air air conditioning system further comprises a water inlet pipe assembly, the water inlet pipe assembly comprises a water inlet main pipe, a first water inlet branch pipe and a second water inlet branch pipe, the water inlet main pipe is located on the first refrigeration cycle path and the second refrigeration cycle path and is connected to the outlet of the cooling tower, the first water inlet branch pipe is located on the first refrigeration cycle path and the first heat supply cycle path and is connected to the water inlet main pipe, the first return water branch pipe is connected to the inlet of the first condenser through the first water inlet branch pipe, and the second water inlet branch pipe is located on the second refrigeration cycle path and the second heat supply cycle path and is connected to the water inlet main pipe, and the second return water branch pipe is connected to the inlet of the second condenser through the second water inlet branch pipe.

[0015] The fresh air air conditioning system further comprises a water outlet pipe assembly, the water outlet pipe assembly comprises a water outlet main pipe, a first water outlet branch pipe and a second water outlet branch pipe, the first water outlet branch pipe is located on the first refrigeration cycle path and the first heat supply cycle path and is connected to the water outlet main pipe, the first water supply branch pipe is connected to the outlet of the first condenser through the first water outlet branch pipe, the second water outlet branch pipe is located on the second refrigeration cycle path and the second heat supply cycle path and is connected to the water outlet main pipe, and the second water supply branch pipe is connected to the outlet of the second condenser through the second water outlet branch pipe.

[0016] In some embodiments, the water inlet pipe assembly further comprises a first water inlet valve and a second water inlet valve, the first water inlet valve is located outside the water flow path of the first return water branch pipe, and the first water inlet valve is connected to the first water inlet branch pipe and is used to open and close the first water inlet branch pipe, the second water inlet valve is located outside the water flow path of the second return water branch pipe, and the second water inlet valve is connected to the second water inlet branch pipe and is used to open and close the second water inlet branch pipe.

[0017] The water outlet pipeline assembly further comprises a first water outlet valve and a second water outlet valve, the first water outlet valve is located outside the water flow path of the first water supply branch pipe, and the first water outlet valve is connected to the first water supply branch pipe and used for opening and closing the first water supply branch pipe, and the second water outlet valve is located outside the water flow path of the second water supply branch pipe, and the second water outlet valve is connected to the second water supply branch pipe and used for opening and closing the second water supply branch pipe.

[0018] In some embodiments, the fresh air air conditioning system further comprises an input pipeline assembly, an output pipeline assembly and a heat plate exchanger, the heat plate exchanger is located on the first heat supply circulation path and the second heat supply circulation path, and communicates the outlet of the heat plate and the return water main pipe;

[0019] The cooling tower, the water inlet main pipe, the second water inlet branch pipe, the input pipeline assembly, the heat plate exchanger, the output pipeline assembly and the water outlet main pipe are sequentially communicated to form a heat protection circulation path.

[0020] In some embodiments, the input pipeline assembly comprises an input main pipe, a first input branch pipe and a second input branch pipe, the first input branch pipe communicates with the second water inlet branch pipe, the input main pipe communicates the first input branch pipe and the second input branch pipe, and the second input branch pipe communicates with the inlet of the heat plate exchanger;

[0021] The output pipeline assembly comprises an output main pipe and an output branch pipe, the output branch pipe communicates with the outlet of the heat plate exchanger, and the output main pipe communicates the output branch pipe and the water outlet main pipe.

[0022] In some embodiments, the input pipeline assembly further comprises a first input valve and a second input valve, the first input valve is connected to the first input branch pipe and used for opening and closing the first input branch pipe, and the second input valve is connected to the second input branch pipe and used for opening and closing the second input branch pipe;

[0023] The output pipeline assembly further comprises an output valve, the output valve is connected to the output branch pipe and used for opening and closing the output branch pipe.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] The fresh air air conditioning system described above, by designing the first condenser to communicate with the heat plate to form the first heat supply circulation path, i.e. the first condenser water supply pipeline sequentially communicates with the heat plate to form the first heat supply circulation path, this design can recycle the heat released when the refrigerant flows through the first condenser, and is used for heating the heat plate, so that the water chiller can take into account its own and the function of the heat pump unit, this design reduces the waste of heat, and the energy consumption and manufacturing cost of the fresh air air conditioning system are reduced. Attached Figure Description

[0026] Figure 1 This is a schematic diagram illustrating the cooperation between a chiller unit and a fresh air handling unit in a fresh air conditioning system according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the cooperation between a heat pump unit and a fresh air handling unit in a fresh air air conditioning system according to an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of a fresh air conditioning system without a fresh air handling unit according to an embodiment of this application;

[0029] Figure 4 for Figure 3 An enlarged schematic diagram of a portion of structure A in the fresh air conditioning system shown;

[0030] Figure 5 for Figure 3 An enlarged schematic diagram of part structure B in the fresh air conditioning system shown;

[0031] Figure 6 for Figure 3 An enlarged schematic diagram of a local structure C in the fresh air conditioning system shown.

[0032] Icon labels:

[0033] 1. Fresh air conditioning system;

[0034] 10. Chiller unit; 20. Heat pump unit; 30. Fresh air handling unit; 40. Return water piping assembly; 50. Supply water piping assembly; 60. Inlet water piping assembly; 70. Outlet water piping assembly; 80. Input piping assembly; 90. Output piping assembly; 100. Plate heat exchanger; 110. First refrigerant circulation path; 120. First heating circulation path; 130. First cooling circulation path; 140. Second refrigerant circulation path; 150. Second heating circulation path; 160. Second cooling circulation path;

[0035] 11. First condenser; 12. First evaporator; 13. First compressor;

[0036] 21. Second condenser; 22. Second evaporator; 23. Second compressor;

[0037] 31. Hot plate; 32. Cold plate;

[0038] 41. Main return water pipe; 42. First return water branch pipe; 43. Second return water branch pipe; 44. First return water valve; 45. Second return water valve;

[0039] 51. Main water supply pipe; 52. First water supply branch pipe; 53. Second water supply branch pipe; 54. First water supply valve; 55. Second water supply valve;

[0040] 61, water inlet main pipe; 62, first water inlet branch pipe; 63, second water inlet branch pipe; 64, first water inlet valve; 65, second water inlet valve;

[0041] 71, water outlet main pipe; 72, first water outlet branch pipe; 73, second water outlet branch pipe; 74, first water outlet valve; 75, second water outlet valve;

[0042] 81, input main pipe; 82, first input branch pipe; 83, second input branch pipe; 84, first input valve; 85, second input valve;

[0043] 91, output main pipe; 92, output branch pipe; 93, output valve. DETAILED DESCRIPTION

[0044] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without using some or all of these specific details, and that the present application is not limited to the specific embodiments disclosed below.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In addition, the terms "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0047] In the present application, unless specifically defined otherwise, the terms "mount", "connected", "connecting", "fixed", and the like, should be construed broadly and can be either fixed or detachable connections, or integral; can be either mechanical or electrical connections; can be direct or indirect connections, or the internal communication or interaction between two elements, unless specifically defined otherwise. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0049] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a mediating element. When an element is referred to as "connected" to another element, it can be directly connected to the other element or there can be a mediating element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0050] Please refer to Figure 1 The present application provides a fresh air conditioning system 1 for improving indoor air quality, temperature and humidity.

[0051] The fresh air conditioning system 1 includes a fresh air unit 30, which includes a hot plate 31 (i.e. heat exchanger) and a cold plate 32 (i.e. cooling coil). When the fresh air conditioning system 1 is working, the cold plate 32 is used to supply cold air to the air and dehumidify and cool the air, and the hot plate 31 is used to heat the dehumidified and cooled air and heat the air to meet the user's demand for temperature. After the cold plate 32 supplies cold air, the temperature of the cold plate 32 rises, so it needs to be cooled, and after the hot plate 31 supplies heat to the air, the temperature of the hot plate 31 decreases, so it needs to be heated.

[0052] The fresh air conditioning system 1 further comprises a water chiller 10, which can supply cold to the cold plate 32 and heat to the hot plate 31, so as to cool the cold plate 32 and heat the hot plate 31. The water chiller 10 comprises a first compressor 13, a first condenser 11 and a first evaporator 12, which are sequentially connected and communicated to form a first refrigerant circulation path 110. The first condenser 11 is communicated with the hot plate 31 to form a first heat supply circulation path 120. The first evaporator 12 is communicated with the cold plate 32 to form a first cold supply circulation path 130.

[0053] Specifically, the first condenser 11 is a double-pipe condenser, which has a first condensing refrigerant pipe and a first condensing water supply pipe. The first evaporator 12 is a double-pipe evaporator, which has a first evaporating refrigerant pipe and a first evaporating water supply pipe. The first compressor 13, the first condensing refrigerant pipe and the first evaporating refrigerant pipe are sequentially communicated to form the first refrigerant circulation path 110 for circulating the refrigerant. The first condensing water supply pipe is sequentially communicated with the hot plate 31 to form the first heat supply circulation path 120. The first evaporating water supply pipe is sequentially communicated with the cold plate 32 to form the first cold supply circulation path 130.

[0054] When the first heat supply circulation path 120 and the first refrigerant circulation path 110 are both working, the refrigerant flows through the first condensing refrigerant pipe, the cold water flows through the first condensing water supply pipe, the refrigerant and the cold water exchange heat, the refrigerant releases heat, the cold water absorbs heat and the temperature of the cold water rises to form hot water. Then, the hot water flows to the hot plate 31 and supplies heat to the hot plate 31.

[0055] When the first cold supply circulation path 130 and the first refrigerant circulation path 110 are both working, the refrigerant flows through the first evaporating refrigerant pipe, and the hot water flows through the first evaporating water supply pipe. The refrigerant and the hot water exchange heat, the refrigerant absorbs heat, the temperature of the hot water decreases to form cold water, and then the cold water flows to the cold plate 32 and supplies cold to the cold plate 32.

[0056] In the prior art, in some embodiments, the first condenser 11 is a single-pipe condenser, which only has the first condensing refrigerant pipe. When the refrigerant flows through the first condensing refrigerant pipe, the heat released by the refrigerant is diffused to the atmosphere. In other embodiments, the first condenser 11 is a double-pipe condenser. The first condensing water supply pipe is sequentially communicated with a cooling tower to form a first refrigeration circulation path. When the warm water flows through the first condensing water supply pipe, the warm water absorbs the heat released by the refrigerant to form hot water, which then flows into the cooling tower and is cooled and refrigerated in the cooling tower.

[0057] As can be seen from the above, in the two ways of the prior art, the first condenser 11 cannot recycle and utilize the heat released by the refrigerant, resulting in waste of heat and high energy consumption of the fresh air conditioning system 1.

[0058] In the present application, the first condenser 11 is designed to communicate with the hot plate 31 to form a first heat supply circulation path 120, i.e., the first condensing water supply pipeline and the hot plate 31 are sequentially communicated to form the first heat supply circulation path 120. This design can recycle the heat released by the refrigerant flowing through the first condenser 11 and use it to heat the hot plate 31, so that the water chiller 10 can take into account its own and the function of the heat pump unit 20. This design reduces heat waste, and the energy consumption and manufacturing cost of the fresh air conditioning system 1 are reduced.

[0059] Please refer to Figure 1 and 2 In some embodiments, the fresh air conditioning system 1 further comprises a heat pump unit 20, which comprises a second compressor 23, a second condenser 21 and a second evaporator 22. The second compressor 23, the second condenser 21 and the second evaporator 22 are sequentially connected and communicated to form a second refrigerant circulation path 140. The second condenser 21 communicates with the hot plate 31 to form a second heat supply circulation path 150. The second evaporator 22 communicates with the cold plate 32 to form a second cooling circulation path 160.

[0060] Specifically, the second condenser 21 is also a double-pipeline condenser, which has a second condensing refrigerant pipeline and a second condensing water supply pipeline. The second evaporator 22 is also a double-pipeline evaporator, which has a second evaporating refrigerant pipeline and a second evaporating water supply pipeline. The second compressor 23, the second condensing refrigerant pipeline and the second evaporating refrigerant pipeline, and the second compressor 23 are sequentially communicated and form a second refrigerant circulation path 140 for circulating refrigerant flow. The second condensing water supply pipeline and the hot plate 31 are sequentially communicated to form a second heat supply circulation path 150. The second evaporating water supply pipeline and the cold plate 32 are sequentially communicated to form a second cooling circulation path 160.

[0061] The second heat supply circulation path 150 is used to supply heat to the hot plate 31, and the second cooling circulation path 160 is used to supply cooling to the cold plate 32. The heat supply principles of the first heat supply circulation path 120 and the second heat supply circulation path are the same, and the cooling principles of the first cooling circulation path 130 and the second cooling circulation path 160 are the same, so they are not repeated here.

[0062] In the present application, according to actual situation needs, the water chiller 10 and the heat pump unit 20 can be selectively started to selectively work the first heat supply circulation path 120 and the second heat supply circulation path 150. When the first heat supply circulation path 120 works, the first cooling circulation path 130 and the first refrigerant circulation path 110 also work. When the second heat supply circulation path 150 works, the second cooling circulation path 160 and the second refrigerant circulation path 140 also work.

[0063] When the heat required by the hot plate 31 is less, for example in spring and autumn, only the water chiller 10 can be started, and the first heating cycle path 120, the first cooling cycle path 130 and the first refrigerant cycle path 110 work. When the heat required by the hot plate 31 is more, for example in winter, the water chiller 10 and the heat pump unit 20 can be started at the same time, and the first heating cycle path 120, the first cooling cycle path 130, the first refrigerant cycle path 110, the second heating cycle path 150, the second cooling cycle path 160 and the second refrigerant cycle path 140 are all started.

[0064] Of course, the working mode of the fresh air conditioning system 1 in the present application is not limited to the above two, in some other embodiments, only the heat pump unit 20 can be started, and only the second heating cycle path 150, the second cooling cycle path 160 and the second refrigerant cycle path 140 work.

[0065] As an example, the water chiller 10 and the heat pump unit 20 can be one or more groups, for the convenience of description, the following embodiments are described by taking the water chiller 10 as two groups and the heat pump unit 20 as four groups. The structure and working principle of the two groups of water chillers 10 are the same, and the structure and working principle of the four groups of heat pump units 20 are the same, so they are not described here.

[0066] The first condenser 11 of each group of water chillers 10 forms a first heating cycle path 120 with the hot plate 31, the first evaporator 12 of each group of water chillers 10 forms a first cooling cycle path 130 with the cold plate 32, the second condenser 21 of each group of heat pump units 20 forms a second heating cycle path 150 with the hot plate 31, and the second evaporator 22 of each group of heat pump units 20 forms a second cooling cycle path 160 with the cold plate 32.

[0067] By designing the heat pump unit 20, the heat pump unit 20 combined with the water chiller can be suitable for different working conditions and meet different working condition requirements.

[0068] Please refer to Figures 1 to 6In some embodiments, the fresh air conditioning system 1 further comprises a return water pipe assembly 40, which comprises a return water main pipe 41, a first return water branch pipe 42 and a second return water branch pipe 43. The return water main pipe 41 is located on the first heating supply circulation path 120 and the second heating supply circulation path 150, and is connected to the outlet of the heat plate 31. The first return water branch pipe 42 is located on the first heating supply circulation path 120, and is connected between the return water main pipe 41 and the inlet of the first condenser 11. The second return water branch pipe 43 is located on the second heating supply circulation path 150, and is connected between the return water main pipe 41 and the inlet of the second condenser 21. The fresh air conditioning system 1 further comprises a water supply pipe assembly 50, which comprises a water supply main pipe 51, a first water supply branch pipe 52 and a second water supply branch pipe 53. The first water supply branch pipe 52 is located on the first heating supply circulation path 120, and is connected between the outlet of the first condenser 11 and the water supply main pipe 51. The second water supply branch pipe 53 is located on the second heating supply circulation path 150, and is connected between the outlet of the second condenser 21 and the water supply main pipe 51. The water supply main pipe 51 is located on the first heating supply circulation path 120 and the second heating supply circulation path 150, and is connected to the inlet of the heat plate 31.

[0069] The first return water branch pipe 42 and the first water supply branch pipe 52 are in one-to-one correspondence with the first heating supply circulation path 120. The first return water branch pipe 42 and the first water supply branch pipe 52 are located on the corresponding first heating supply circulation path 120. The first return water branch pipe 42 is connected to the inlet of the first condenser 11 of the first heating supply circulation path 120. The first water supply branch pipe 52 is connected to the outlet of the first condenser 11 of the first heating supply circulation path 120.

[0070] The second return water branch pipe 43 and the second water supply branch pipe 53 are in one-to-one correspondence with the second heating supply circulation path 150. The second return water branch pipe 43 and the second water supply branch pipe 53 are located on the corresponding second heating supply circulation path 150. The second return water branch pipe 43 is connected to the inlet of the second condenser 21 of the second heating supply circulation path 150. The second water supply branch pipe 53 is connected to the outlet of the second condenser 21 of the second heating supply circulation path 150.

[0071] When the two sets of water chillers 10 are started and the two first heating supply circulation paths 120 are working, the cold water formed after heat exchange with the heat plate 31 is divided into two first return water branch pipes 42 at the return water main pipe 41 (the flow direction of the cold water in the return water main pipe 41 is indicated by arrow a in FIG. 6), flows through the two first condensers 11 to form hot water, and then converges into the water supply main pipe 51 through the two first water supply branch pipes 52 (the flow direction of the hot water in the water supply main pipe 51 is indicated by arrow b in FIG. 6). Finally, the hot water returns to the heat plate 31 and provides heat for the heat plate 31 again. Figure 6 Figure 6

[0072] ​​When the four heat pump units 20 are started and the four second heat supply circulation paths 150 are working, the cold water formed after heat exchange with the heat plates 31 is divided into four second return water branch pipes 43 at the return water main pipe 41, flows through the four second condensers 21 to form hot water, and then is collected into the water supply main pipe 51 through the four second water supply branch pipes 53, and finally flows back to the heat plates 31 to supply heat to the heat plates 31 again.

[0073] In the embodiment, by designing the return water pipe assembly 40 to have the return water main pipe 41, the first return water branch pipe 42 and the second return water branch pipe 43, and designing the water supply pipe assembly 50 to have the water supply main pipe 51, the first water supply branch pipe 52 and the second water supply branch pipe 53, the first heat supply circulation path 120 and / or the second heat supply circulation path 150 can be selectively used according to different working conditions, and the application range is wide.

[0074] Further, in some embodiments, the return water pipe assembly 40 further includes a first return water valve 44 and a second return water valve 45, the first return water valve 44 is connected to the first return water branch pipe 42 and is used to open and close the first return water branch pipe 42, and the second return water valve 45 is connected to the second return water branch pipe 43 and is used to open and close the second return water branch pipe 43. The water supply pipe assembly 50 further includes a first water supply valve 54 and a second water supply valve 55, the first water supply valve 54 is connected to the first water supply branch pipe 52 and is used to open and close the first water supply branch pipe 52, and the second water supply valve 55 is connected to the second water supply branch pipe 53 and is used to open and close the second water supply branch pipe 53.

[0075] The first return water valve 44 and the first water supply valve 54 correspond to the first heat supply circulation path 120 one by one, the first return water valve 44 is arranged on the first return water branch pipe 42 of the first heat supply circulation path 120 where it is arranged, and the first water supply valve 54 is arranged on the first water supply branch pipe 52 of the first heat supply circulation path 120 where it is arranged. The second return water valve 45 and the second water supply valve 55 correspond to the second heat supply circulation path 150 one by one, the second return water valve 45 is arranged on the second return water branch pipe 43 of the second heat supply circulation path 150 where it is arranged, and the second water supply valve 55 is arranged on the second water supply branch pipe 53 of the second heat supply circulation path 150 where it is arranged.

[0076] When the first return valve 44 and the first supply valve 54 are open, the first heating circulation path 120 containing the first return valve 44 and the first supply valve 54 operates. When the second return valve 45 and the second supply valve 55 are open, the second heating circulation path 150 containing the second return valve 45 and the second supply valve 55 operates. By designing the first return valve 44, the first supply valve 54, the second return valve 45, and the second supply valve 55, there is no interference between different first heating circulation paths 120, between different second heating circulation paths 150, and between the first heating circulation path 120 and the second heating circulation path 150, thus improving the reliability of the fresh air conditioning system 1. Furthermore, according to actual operating conditions, the number of first heating circulation paths 120 and / or second heating circulation paths 150 operating can be controlled, which can reduce energy consumption while adapting to different operating conditions.

[0077] In some embodiments, the fresh air conditioning system 1 further includes a cooling tower, with the first condenser 11 forming a first refrigeration cycle path with the cooling tower, and the second condenser 21 forming a second refrigeration cycle path with the cooling tower.

[0078] Specifically, the first condensate water supply pipeline is connected to the cooling tower in sequence to form the first refrigeration cycle path, and the second condensate water supply pipeline is connected to the cooling tower in sequence to form the second refrigeration cycle path.

[0079] When both chiller units 10 are started and the two first refrigeration cycle paths are working, the chilled water in the cooling tower flows into the first condensate water supply pipeline of the two chiller units 10, and absorbs the heat released by the refrigerant in the two first condensers 11 to form hot water. Then, the hot water flows into the cooling tower and is cooled by the cooling tower to form chilled water. In this embodiment, the first condenser 11 does not supply heat to the hot plate 31.

[0080] When all four chiller units 10 are started and the four second refrigeration cycle paths are working, the chilled water in the cooling tower flows into the second condensate supply pipelines of the two chiller units 10, and absorbs the heat released by the refrigerant in the two second condensers 21 to form hot water. Then, the hot water flows into the cooling tower and is cooled by the cooling tower to form chilled water. In this embodiment, the second condenser 21 does not supply heat to the hot plate 31.

[0081] When the heat required for heating the air by the hot plate 31 is less, the first refrigeration cycle path or the second refrigeration cycle path works to reduce the heat provided by the chiller unit 10 or the heat pump unit 20 to the hot plate 31, so that the air temperature after being processed by the fresh air conditioning system 1 meets the user's needs.

[0082] In this embodiment, by setting a first cooling cycle path and a second cooling cycle path, the first cooling cycle path or the second cooling cycle path can be selected according to different operating conditions, thereby making the application range of the fresh air conditioning system 1 wider.

[0083] Furthermore, in some embodiments, the fresh air conditioning system 1 further includes a water inlet pipe assembly 60, which includes a main water inlet pipe 61, a first water inlet branch pipe 62, and a second water inlet branch pipe 63. The main water inlet pipe 61 is located on the first refrigeration cycle path and the second refrigeration cycle path and is connected to the outlet of the cooling tower. The first water inlet branch pipe 62 is located on the first refrigeration cycle path and the first heating cycle path 120 and is connected to the main water inlet pipe 61. The first return water branch pipe 42 is connected to the inlet of the first condenser 11 through the first water inlet branch pipe 62. The second water inlet branch pipe 63 is located on the second refrigeration cycle path and the second heating cycle path 150 and is connected to the main water inlet pipe 61. The second return water branch pipe 43 is connected to the inlet of the second condenser 21 through the second water inlet branch pipe 63. The fresh air conditioning system 1 also includes a water outlet pipe assembly 70, which includes a main water outlet pipe 71, a first water outlet branch pipe 72, and a second water outlet branch pipe 73. The first water outlet branch pipe 72 is located on the first refrigeration cycle path and the first heating cycle path 120 and is connected to the main water outlet pipe 71. The first water supply branch pipe 52 is connected to the outlet of the first condenser 11 through the first water outlet branch pipe 72. The second water outlet branch pipe 73 is located on the second refrigeration cycle path and the second heating cycle path 150 and is connected to the main water outlet pipe 71. The second water supply branch pipe 53 is connected to the outlet of the second condenser 21 through the second water outlet branch pipe 73.

[0084] When the two sets of chiller units 10 are started and the two first refrigeration cycle paths are working, the chilled water in the cooling tower is split at the inlet main pipe 61 to the two first inlet branch pipes 62, and flows through the first condenser 11 of the two sets of chiller units 10 to form hot water. Then, it flows through the two first outlet branch pipes 72 to the outlet main pipe 71, and finally flows back to the cooling tower for cooling.

[0085] When the four chiller units 10 are started and the four first refrigeration cycle paths are working, the chilled water in the cooling tower is diverted at the main inlet pipe 61 to two second inlet branch pipes 63, and flows through the second condenser 21 of the four chiller units 10 to form hot water. Then, it flows through the four second outlet branch pipes 73 to the main outlet pipe 71, and finally flows back to the cooling tower for cooling.

[0086] In this embodiment, the water inlet pipe assembly 60 includes a main water inlet pipe 61, a first water inlet branch pipe 62, and a second water inlet branch pipe 63, and the water outlet pipe assembly 70 includes a main water outlet pipe 71, a first water outlet branch pipe 72, and a second water outlet branch pipe 73. Therefore, depending on different working conditions, either the first refrigeration cycle path or the second refrigeration cycle path can be selectively used, making it widely applicable.

[0087] It is worth mentioning that, in this application, when the first heating circulation path 120 is working, the cold water that is diverted from the return water main pipe 41 to the first return water branch pipe 42 enters the first condenser 11 through the first inlet water branch pipe 62 to absorb heat and form hot water. Then, the hot water flows through the first outlet water branch pipe 72 and the first supply water branch pipe 52 to the supply water main pipe 51. When the second heating circulation path 150 is working, the cold water that is diverted from the return water main pipe 41 to the second return water branch pipe 43 enters the second condenser 21 through the second inlet water branch pipe 63 to absorb heat and form hot water. Then, the hot water flows through the second outlet water branch pipe 73 and the second supply water branch pipe 53 to the supply water main pipe 51.

[0088] Furthermore, in some embodiments, the water inlet pipe assembly 60 further includes a first water inlet valve 64 and a second water inlet valve 65. The first water inlet valve 64 is located outside the water flow path of the first return water branch pipe 42 and is connected to the first water inlet branch pipe 62 for opening and closing the first water inlet branch pipe 62. The second water inlet valve 65 is located outside the water flow path of the second return water branch pipe 43 and is connected to the second water inlet branch pipe 63 for opening and closing the second water inlet branch pipe 63. The water outlet pipe assembly 70 also includes a first water outlet valve 74 and a second water outlet valve 75. The first water outlet valve 74 is located outside the water flow path of the first water supply branch pipe 52 and is connected to the first water outlet branch pipe 72 for opening and closing the first water outlet branch pipe 72. The second water outlet valve 75 is located outside the water flow path of the second water supply branch pipe 53 and is connected to the second water outlet branch pipe 73 for opening and closing the second water outlet branch pipe 73.

[0089] The first inlet valve 64 and the first outlet valve 74 correspond one-to-one with the first refrigeration cycle path. The first inlet valve 64 is installed on the first inlet branch pipe 62 of the first refrigeration cycle path, and the first outlet valve 74 is installed on the first outlet branch pipe 72 of the first refrigeration cycle path. The second inlet valve 65 and the second outlet valve 75 correspond one-to-one with the second refrigeration cycle path. The second inlet valve 65 is installed on the second inlet branch pipe 63 of the second refrigeration cycle path, and the second outlet valve 75 is installed on the second outlet branch pipe 73 of the second refrigeration cycle path.

[0090] When the first inlet valve 64 and the first outlet valve 74 are opened, the first refrigeration cycle path containing the first inlet valve 64 and the first outlet valve 74 is in operation. When the second inlet valve 65 and the second outlet valve 75 are opened, the second refrigeration cycle path containing the second inlet valve 65 and the second outlet valve 75 is in operation.

[0091] By designing the first inlet valve 64, the first outlet valve 74, the second inlet valve 65, and the second outlet valve 75, different first refrigeration cycle paths, different second refrigeration cycle paths, and the first and second refrigeration cycle paths do not interfere with each other, thus improving the reliability of the fresh air conditioning system 1. Furthermore, based on actual operating conditions, the number of first or second refrigeration cycle paths operating can be controlled, reducing energy consumption while adapting to different operating conditions.

[0092] Please see Figures 1 to 6 In some embodiments, the fresh air conditioning system 1 further includes an input pipe assembly 80, an output pipe assembly 90, and a heat exchanger 100. The heat exchanger 100 is located on the first heating circulation path 120 and the second heating circulation path 150, and is connected to the outlet of the heat plate 31 and the return water main 41. The cooling tower, the inlet water main 61, the second inlet water branch pipe 63, the input pipe assembly 80, the heat exchanger 100 (i.e., the plate heat exchanger), the output pipe assembly 90, and the outlet water main 71 are sequentially connected to form a thermal protection circulation path.

[0093] Specifically, both the chiller unit 10 and the heat pump unit 20 have overheat protection functions. When water with excessively high temperature flows into the chiller unit 10 and the heat pump unit 20, the chiller unit 10 will automatically shut off the first compressor 13 and stop working due to the overheat protection function, and the heat pump unit 20 will automatically shut off the second compressor 23 and stop working due to the overheat protection function.

[0094] In this configuration, a thermal protection circulation path is implemented. The heat exchanger 100 has a first pipe and a second pipe. The working principle of the thermal protection circulation path is as follows: the chilled water formed after heating the heat plate 31 first flows through the first pipe of the heat exchanger 100 and then flows into the return water main pipe 41 for branching. A temperature sensor is installed in the fresh air conditioning system 1. During the flow of chilled water through the first pipe, the temperature sensor detects the temperature of the chilled water. If the temperature of the chilled water exceeds the set temperature value (e.g., 37 degrees Celsius), it indicates that the temperature of the chilled water is too high. Chilled water of this temperature flowing back into the chiller unit 10 and the heat pump unit 20 can easily cause the chiller unit 10 and the heat pump unit 20 to overheat and trigger their protection. In this case, the thermal protection circulation path operates, allowing the chilled water formed after cooling in the cooling tower to sequentially pass through the inlet main pipe 61, the second inlet branch pipe 63, and the input pipe assembly 80 into the second pipe of the heat exchanger 100. Because the temperature of the chilled water in the second pipe is lower than that in the first pipe, heat exchange occurs between them. This causes the temperature in the first pipe to drop below the set temperature value before being diverted to the chiller unit 10 and heat pump unit 20 via the return water main 41. This prevents overheating protection of the chiller unit 10 and heat pump unit 20, ensuring the normal operation of the fresh air conditioning system 1. The chilled water in the second pipe absorbs heat from the chilled water in the first pipe, causing its temperature to rise. It then flows back to the cooling tower via the outlet water main 71 for further cooling.

[0095] In some embodiments, the input piping assembly 80 includes an input main pipe 81, a first input branch pipe 82, and a second input branch pipe 83. The first input branch pipe 82 is connected to a second inlet branch pipe 63. The input main pipe 81 is connected to the first input branch pipe 82 and the second input branch pipe 83. The second input branch pipe 83 is connected to the inlet of the heat exchanger 100. The output piping assembly 90 includes an output main pipe 91 and an output branch pipe 92. The output branch pipe 92 is connected to the outlet of the heat exchanger 100. The output main pipe 91 is connected to the output branch pipe 92 and the outlet main pipe 71.

[0096] The first input branch pipe 82 corresponds one-to-one with the second inlet branch pipe 63, and the first input branch pipe 82 connects to the main input pipe 81 and the corresponding second inlet branch pipe 63. The second input branch pipe 83 is paired with the output branch pipe 92. Depending on actual needs, both the second input branch pipe 83 and the output branch pipe 92 can be configured as single or multiple pipes. Preferably, both the second input branch pipe 83 and the output branch pipe 92 can be configured as multiple pipes, forming multiple pairs. For example, both the second input branch pipe 83 and the output branch pipe 92 can be configured as three pipes, forming three pairs. Figure 6 For example, the second input tube and the output branch tube 92 arranged adjacent to each other in the vertical direction are the second input tube and the output branch tube 92 used in pairs.

[0097] The cold water flowing out of the cooling tower enters the heat exchanger 100 in sequence through the inlet main pipe 61, the second inlet branch pipe 63, the first input branch pipe 82, the input main pipe 81 and the second input branch pipe 83. After heat exchange in the heat exchanger 100, it returns to the cooling tower in sequence through the output branch pipe 92 paired with the second input branch pipe 83, the output main pipe 91 and the outlet water main pipe 71.

[0098] In this embodiment, the cooling tower, the main inlet pipe 61, any second inlet branch pipe 63, any first input branch pipe 82, the main input pipe 81, any second input branch pipe 83, the heat exchanger 100, any output branch pipe 92, the main output pipe 91, and the main outlet pipe 71 are sequentially connected to form a thermal protection circulation path (cold water flows along the path as follows). Figure 6 (The values ​​indicated by arrows d, e, and f). When the temperature of the chilled water flowing from the hot plate 31 into the heat exchanger 100 is too high, the cooling tower can input chilled water into the heat exchanger 100 through multiple thermal protection circulation paths, and rapidly cool the chilled water flowing from the hot plate 31 into the heat exchanger 100, further improving the reliability of the fresh air conditioning system 1.

[0099] In some embodiments, the input piping assembly 80 further includes a first input valve 84 and a second input valve 85. The first input valve 84 is coupled to a first input branch pipe 82 and is used to open and close the first input branch pipe 82. The second input valve 85 is coupled to a second input branch pipe 83 and is used to open and close the second input branch pipe 83. The output piping assembly 90 further includes an output valve 93, which is coupled to an output branch pipe 92 and is used to open and close the output branch pipe 92.

[0100] The first input valve 84 corresponds one-to-one with the first input branch pipe 82. The first input valve 84 is connected to the corresponding first input branch pipe 82 and is used to open and close the corresponding first input branch pipe 82. The second input valve 85 corresponds one-to-one with the second input branch pipe 83. The second input valve 85 is connected to the corresponding second input branch pipe 83 and is used to open and close the corresponding second input branch pipe 83. The output valve 93 corresponds one-to-one with the output branch pipe 92. The output valve 93 is connected to the corresponding output branch pipe 92 and is used to open and close the corresponding output branch pipe 92.

[0101] When the first input valve 84, the second input valve 85, and the output valve 93 are open, the thermal protection cycle path containing these three valves operates. Through the design of the first input valve 84, the second input valve 85, and the output valve 93, different thermal protection cycle paths do not interfere with each other. The number of thermal protection cycle paths operating can be controlled according to actual operating conditions, reducing energy consumption while adapting to different conditions.

[0102] The aforementioned fresh air conditioning system 1, by designing the first condenser 11 and the hot plate 31 to form a first heating circulation path 120, that is, the first condensate water supply pipe and the hot plate 31 are sequentially connected to form the first heating circulation path 120. This design can recover and utilize the heat released when the refrigerant flows through the first condenser 11 and use it to heat the hot plate 31, so that the chiller unit 10 can take into account its own function and the function of the heat pump unit 20. This design reduces heat waste, and the energy consumption and manufacturing cost of the fresh air conditioning system 1 are reduced.

[0103] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0104] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fresh air conditioning system, characterized by, The fresh air conditioning system comprises: A water chiller unit comprising a first condenser; A fresh air unit comprising a hot plate; The first condenser and the hot plate are in communication to form a first heat supply circulation path; The fresh air conditioning system further comprises a heat pump unit, wherein the heat pump unit comprises a second condenser, and the second condenser is in communication with the hot plate to form a second heat supply circulation path; The fresh air conditioning system further comprises a return water pipeline assembly, wherein the return water pipeline assembly comprises a return water main pipe, a first return water branch pipe and a second return water branch pipe, the return water main pipe is located on the first heat supply circulation path and the second heat supply circulation path, and is in communication with an outlet of the hot plate, the first return water branch pipe is located on the first heat supply circulation path, and is in communication between the return water main pipe and an inlet of the first condenser, and the second return water branch pipe is located on the second heat supply circulation path, and is in communication between the return water main pipe and an inlet of the second condenser; The fresh air conditioning system further comprises a water supply pipeline assembly, wherein the water supply pipeline assembly comprises a water supply main pipe, a first water supply branch pipe and a second water supply branch pipe, the first water supply branch pipe is located on the first heat supply circulation path, and is in communication between an outlet of the first condenser and the water supply main pipe, the second water supply branch pipe is located on the second heat supply circulation path, and is in communication between an outlet of the second condenser and the water supply main pipe, and the water supply main pipe is located on the first heat supply circulation path and the second heat supply circulation path, and is in communication with an inlet of the hot plate.

2. The fresh air conditioning system of claim 1, wherein, The return water pipeline assembly further comprises a first return water valve and a second return water valve, the first return water valve is connected to the first return water branch pipe, and is used to open and close the first return water branch pipe, and the second return water valve is connected to the second return water branch pipe, and is used to open and close the second return water branch pipe; The water supply pipeline assembly further comprises a first water supply valve and a second water supply valve, the first water supply valve is connected to the first water supply branch pipe, and is used to open and close the first water supply branch pipe, and the second water supply valve is connected to the second water supply branch pipe, and is used to open and close the second water supply branch pipe.

3. The fresh air conditioning system of claim 1, wherein, The fresh air conditioning system further comprises a cooling tower, the first condenser and the cooling tower form a first refrigeration circulation path, and the second condenser and the cooling tower form a second refrigeration circulation path.

4. The fresh air conditioning system of claim 3, wherein, The fresh air conditioning system further comprises a water inlet pipeline assembly, wherein the water inlet pipeline assembly comprises a water inlet main pipe, a first water inlet branch pipe and a second water inlet branch pipe, the water inlet main pipe is located on the first refrigeration circulation path and the second refrigeration circulation path, and is in communication with an outlet of the cooling tower, the first water inlet branch pipe is located on the first refrigeration circulation path and the first heat supply circulation path, and is in communication with the water inlet main pipe, the first return water branch pipe is in communication with the inlet of the first condenser through the first water inlet branch pipe, the second water inlet branch pipe is located on the second refrigeration circulation path and the second heat supply circulation path, and is in communication with the water inlet main pipe, and the second return water branch pipe is in communication with the inlet of the second condenser through the second water inlet branch pipe; The fresh air air conditioning system further comprises a water outlet pipeline assembly, the water outlet pipeline assembly comprises a water outlet main pipe, a first water outlet branch pipe and a second water outlet branch pipe, the first water outlet branch pipe is located on the first refrigeration cycle path and the first heat supply cycle path, and is communicated with the water outlet main pipe, the first water supply branch pipe is communicated with the outlet of the first condenser through the first water outlet branch pipe, the second water outlet branch pipe is located on the second refrigeration cycle path and the second heat supply cycle path, and is communicated with the water outlet main pipe, and the second water supply branch pipe is communicated with the outlet of the second condenser through the second water outlet branch pipe.

5. The fresh air conditioning system of claim 4, wherein, The water inlet pipeline assembly further comprises a first water inlet valve and a second water inlet valve, the first water inlet valve is located outside the water flow path of the first water return branch pipe, and the first water inlet valve is matched with the first water inlet branch pipe and used for opening and closing the first water inlet branch pipe, the second water inlet valve is located outside the water flow path of the second water return branch pipe, and the second water inlet valve is matched with the second water inlet branch pipe and used for opening and closing the second water inlet branch pipe. The water outlet pipeline assembly further comprises a first water outlet valve and a second water outlet valve, the first water outlet valve is located outside the water flow path of the first water supply branch pipe, and the first water outlet valve is matched with the first water outlet branch pipe and used for opening and closing the first water outlet branch pipe, the second water outlet valve is located outside the water flow path of the second water supply branch pipe, and the second water outlet valve is matched with the second water outlet branch pipe and used for opening and closing the second water outlet branch pipe.

6. The fresh air conditioning system of claim 4, wherein, The fresh air air conditioning system further comprises an input pipeline assembly, an output pipeline assembly and a heat plate exchanger, the heat plate exchanger is located on the first heat supply cycle path and the second heat supply cycle path, and is communicated with the outlet of the heat plate and the water return main pipe; The cooling tower, the water inlet main pipe, the second water inlet branch pipe, the input pipeline assembly, the heat plate exchanger, the output pipeline assembly and the water outlet main pipe are sequentially communicated to form a heat protection cycle path.

7. The fresh air conditioning system of claim 6, wherein, The input pipeline assembly comprises an input main pipe, a first input branch pipe and a second input branch pipe, the first input branch pipe is communicated with the second water inlet branch pipe, the input main pipe is communicated with the first input branch pipe and the second input branch pipe, and the second input branch pipe is communicated with the inlet of the heat plate exchanger; The output pipeline assembly comprises an output main pipe and an output branch pipe, the output branch pipe is communicated with the outlet of the heat plate exchanger, and the output main pipe is communicated with the output branch pipe and the water outlet main pipe.

8. The fresh air conditioning system of claim 7, wherein, The input pipeline assembly further comprises a first input valve and a second input valve, the first input valve is matched with the first input branch pipe and used for opening and closing the first input branch pipe, and the second input valve is matched with the second input branch pipe and used for opening and closing the second input branch pipe; the output pipeline assembly further comprises an output valve, the output valve is matched with the output branch pipe and used for opening and closing the output branch pipe.

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