Fresh air conditioning system

Abstract

The utility model relates to a fresh air conditioning system. The fresh air conditioning system has a high-temperature and high-humidity treatment mode, and comprises a fresh air handling unit, a fresh air conditioning system and a fresh air conditioning system, the heat pump unit comprises a heat pump condenser; the pretreatment pipeline assembly comprises a pretreatment water supply pipe, and the pretreatment water supply pipe is communicated between the hot water outlet end of the heat pump condenser and the hot water inlet end of the pretreatment heat exchange plate; the reheating pipeline assembly comprises a reheating water return pipe, and the reheating water return pipe is communicated between the hot water outlet end of the reheating heat exchange plate and the hot water inlet end of the heat pump condenser; and the heat recovery pipeline assembly comprises a heat recovery pipe, and the heat recovery pipe communicates between the reheating water return pipe and the pretreatment water supply pipe and is configured to guide return water in the reheating water return pipe to flow to the pretreatment water supply pipe in the high-temperature and high-humidity treatment mode. According to the fresh air conditioning system, the electricity utilization cost and the 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] In the prior art, a fresh air conditioning system is usually used to process air, so that the temperature and humidity of the air meet the target requirements before being introduced into a workshop environment that needs to be temperature and humidity controlled, so that the temperature and humidity of the workshop environment meet the production requirements.

[0003] In summer, the temperature and humidity of the air are both relatively high, and the load of air cooling and dehumidification is also increased, resulting in high electricity cost and large energy consumption of the fresh air conditioning system. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a fresh air conditioning system capable of reducing electricity cost and energy consumption in view of the above problems.

[0005] A fresh air conditioning system has a high-temperature and high-humidity processing mode, and the fresh air conditioning system comprises:

[0006] a fresh air handling unit, comprising a pre-processing heat exchange plate and a reheating heat exchange plate;

[0007] a heat pump unit, comprising a heat pump condenser;

[0008] a pre-processing pipeline assembly, comprising a pre-processing water supply pipe, which is connected between a hot water outlet end of the heat pump condenser and a hot water inlet end of the pre-processing heat exchange plate;

[0009] a reheating pipeline assembly, comprising a reheating return water pipe, which is connected between a hot water outlet end of the reheating heat exchange plate and a hot water inlet end of the heat pump condenser; and

[0010] a heat recovery pipeline assembly, comprising a heat recovery pipe, which is connected between the reheating return water pipe and the pre-processing water supply pipe and is configured to guide return water in the reheating return water pipe to the pre-processing water supply pipe in the high-temperature and high-humidity processing mode.

[0011] In some embodiments, the heat recovery pipeline assembly further comprises a heat recovery valve, which is arranged on the heat recovery pipe and is configured to be opened in the high-temperature and high-humidity processing mode.

[0012] In some embodiments, the pre-processing pipeline assembly further comprises a pre-processing water supply valve, which is arranged on the pre-processing water supply pipe and is located upstream of the intersection point of the heat recovery pipe and the pre-processing water supply pipe, and the pre-processing water supply valve is configured to be closed in the high-temperature and high-humidity processing mode.

[0013] In some embodiments, the pre-cooling pipeline assembly further comprises a pre-cooling water supply pipe and a pre-cooling water supply valve, the pre-cooling water supply pipe being connected between the cold water outlet end of the pre-cooling evaporator and the cold water inlet end of the pre-cooling heat exchanger plate, the pre-cooling water supply valve being arranged on the pre-cooling water supply pipe and configured to be opened in the high-temperature and high-humidity treatment mode.

[0014] In some embodiments, the re-heating pipeline assembly further comprises a re-heating water return valve, the re-heating water return valve being arranged on the re-heating water return pipe and located downstream of the intersection point of the heat recovery pipe and the re-heating water return pipe, the re-heating water return valve being configured to be closed in the high-temperature and high-humidity treatment mode.

[0015] In some embodiments, the re-heating pipeline assembly further comprises a re-heating water supply pipe and a re-heating water supply valve, the re-heating water supply pipe being connected between the hot water outlet end of the heat pump condenser and the hot water inlet end of the re-heating heat exchanger plate, the re-heating water supply valve being arranged on the re-heating water supply pipe and configured to be opened in the high-temperature and high-humidity treatment mode.

[0016] In some embodiments, the fresh air unit further comprises a pre-cooling heat exchanger plate;

[0017] The fresh air air conditioning system further comprises a pre-cooling water chiller and a pre-cooling pipeline assembly, the pre-cooling water chiller comprising a pre-cooling evaporator, the pre-cooling pipeline assembly comprising a pre-cooling water supply pipe and a pre-cooling water return pipe, the pre-cooling water supply pipe being connected between the cold water outlet end of the pre-cooling evaporator and the cold water inlet end of the pre-cooling heat exchanger plate, the pre-cooling water return pipe being connected between the cold water outlet end of the pre-cooling heat exchanger plate and the cold water inlet end of the pre-cooling evaporator.

[0018] In some embodiments, the pre-cooling pipeline assembly further comprises a pre-cooling water supply valve and a pre-cooling water return valve, the pre-cooling water supply valve being arranged on the pre-cooling water supply pipe, the pre-cooling water return valve being arranged on the pre-cooling water return pipe, the pre-cooling water supply valve and the pre-cooling water return valve being configured to be opened in the high-temperature and high-humidity treatment mode.

[0019] In some embodiments, the fresh air unit further comprises a re-cooling heat exchanger plate;

[0020] The fresh air air conditioning system further comprises a re-cooling water chiller and a re-cooling pipeline assembly, the re-cooling water chiller comprising a re-cooling evaporator, the re-cooling pipeline assembly comprising a re-cooling water supply pipe and a re-cooling water return pipe, the re-cooling water supply pipe being connected between the cold water outlet end of the re-cooling evaporator and the cold water inlet end of the re-cooling heat exchanger plate, the re-cooling water return pipe being connected between the cold water outlet end of the re-cooling heat exchanger plate and the cold water inlet end of the re-cooling evaporator.

[0021] In some embodiments, the recooling pipe assembly further comprises a recooling water supply valve and a recooling water return valve, the recooling water supply valve is arranged on the recooling water supply pipe, the recooling water return valve is arranged on the recooling water return pipe, and the recooling water supply valve and the recooling water return valve are configured to be opened in the high-temperature and high-humidity processing mode.

[0022] Compared with the prior art, the application has the following beneficial effects:

[0023] The new air conditioning system can use the hot water in the reheat water return pipe as a cold source to supply cold to the pre-processing heat exchange plate, so that in the high-temperature and high-humidity mode, the new air conditioning system can also use the hot water with a relatively low temperature in the reheat water return pipe to precool the air before precooling the air, so as to reduce the cooling load of the subsequent precooling chiller and recooling chiller, and thus the power consumption and energy consumption of the new air conditioning system are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 is a layout diagram of a new air conditioning system according to an embodiment of the application;

[0025] Figure 2 FIG. 2 is a layout diagram of a new air conditioning system according to another embodiment of the application; Figure 1 FIG. 3 is a layout diagram of a new air conditioning system according to another embodiment of the application;

[0026] Figure 3 FIG. 4 is a layout diagram of a new air conditioning system according to another embodiment of the application; Figure 1 FIG. 5 is a layout diagram of a new air conditioning system according to another embodiment of the application.

[0027] REFERENCE SIGNS

[0028] 100, new air conditioning system;

[0029] 10, new air conditioning unit; 20, pre-processing pipe assembly; 30, precooling pipe assembly; 40, recooling pipe assembly; 50, reheat pipe assembly; 60, heat recovery pipe assembly;

[0030] 11, pre-processing heat exchange plate; 12, precooling heat exchange plate; 13, recooling heat exchange plate; 14, reheat heat exchange plate;

[0031] 21, pre-processing water supply pipe; 22, pre-processing water supply valve; 23, pre-processing water return pipe; 24, pre-processing water return valve; 25, pre-processing bypass pipe; 26, pre-processing bypass valve;

[0032] 31, precooling water supply pipe; 32, precooling water supply valve; 33, precooling water return pipe; 34, precooling water return valve; 35, precooling bypass pipe; 36, precooling bypass valve;

[0033] 41, recooling water supply pipe; 42, recooling water supply valve; 43, recooling water return pipe; 44, recooling water return valve; 45, recooling bypass pipe; 46, recooling bypass valve;

[0034] 51, reheating water supply pipe; 52, reheating water supply valve; 53, reheating water return pipe; 54, reheating water return valve; 55, reheating bypass pipe; 56, reheating bypass valve;

[0035] 61, heat recovery pipe; 62, heat recovery valve. DETAILED DESCRIPTION

[0036] In order to make the above objectives, features and advantages of the present application more clear and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "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 therefore cannot be understood as indicating or implying that the devices or elements 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.

[0038] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the 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.

[0039] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless specifically stated and limited otherwise, a first feature is "on" or "under" a second feature can mean 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 "over", "above" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature "under", "below" and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0041] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on the other element or there can be an intermediate 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 an intermediate element. The terms "vertical", "horizontal", "up", "down", "left", "right" and the like used herein are for illustrative purposes only and are not the only implementation.

[0042] In the prior art, a fresh air conditioning system is usually used to process air, so that the temperature and humidity of the air meet the target requirements, and then the air is introduced into a workshop environment that needs to be temperature and humidity controlled, so that the temperature and humidity of the workshop environment meet the production requirements.

[0043] In summer, the temperature and humidity of the air are both high, and the cooling load and dehumidification load of the air are also increased, resulting in high electricity cost and large energy consumption of the fresh air conditioning system.

[0044] Please refer to Figures 1 to 3 , in order to alleviate the above problems, the applicant has designed a fresh air conditioning system 100 after in-depth research. The fresh air conditioning system 100 includes a fresh air unit 10, a heat pump unit, a pretreatment pipeline assembly 20, a reheating pipeline assembly 50, a heat recovery pipeline assembly 60, a precooling chilled water unit, a precooling pipeline assembly 30, a recooling chilled water unit and a recooling pipeline assembly 40.

[0045] The fresh air unit 10 includes a pretreatment heat exchange plate 11, a reheating heat exchange plate 14 (hot plate), a precooling heat exchange plate 12 (cold plate) and a recooling heat exchange plate 13 (cold plate). The hot plate is used to supply heat to the air to increase the temperature of the air, and the cold plate is used to supply cold to the air to reduce the temperature of the air.

[0046] The heat pump unit includes a heat pump compressor, a heat pump condenser and a heat pump evaporator. The heat pump condenser is a double-pipe condenser and has a heat pump refrigerant circulation pipe and a heat pump water circulation pipe. The heat pump compressor, the heat pump refrigerant circulation pipe and the heat pump evaporator are sequentially communicated and form a heat pump refrigerant circulation path for circulating the refrigerant.

[0047] The pretreatment piping assembly 20 includes a pretreatment water supply pipe 21 and a pretreatment water return pipe 23. The pretreatment water supply pipe 21 is connected between the hot water outlet of the heat pump condenser and the hot water inlet of the pretreatment heat exchange plate 11. The pretreatment water return pipe 23 is connected between the hot water outlet of the pretreatment heat exchange plate 11 and the hot water inlet of the heat pump condenser.

[0048] Specifically, the hot water outlet of the heat pump condenser is the same as the hot water outlet of the heat pump water circulation pipe, and the hot water inlet of the heat pump condenser is the same as the hot water inlet of the heat pump water circulation pipe. Therefore, the hot water outlet of the heat pump water circulation pipe, the pretreatment water supply pipe 21, the pretreatment heat exchange plate 11, the pretreatment return water pipe 23, and the hot water inlet of the heat pump water circulation pipe are connected in sequence to form a preheated hot water circulation path for hot water circulation.

[0049] During preheating, the hot water output from the hot water outlet of the heat pump water circulation pipe (the direction of hot water flow is as follows) Figure 2 (Indicated by the middle arrow a) The water flows through the pretreatment supply pipe 21 to the pretreatment heat exchange plate 11, heating the pretreatment heat exchange plate 11 and raising its temperature, thus preheating the air. After heating, the hot water temperature decreases and, under the action of the pretreatment return water pipe 23, flows back from the hot water inlet of the heat pump water circulation pipe to the heat pump condenser (the direction of hot water return is as follows). Figure 2 (As indicated by the middle arrow b), and after exchanging heat with the refrigerant in the heat pump refrigerant circulation pipe, the temperature rises, forming hot water at a higher temperature, which is then output and circulated again.

[0050] The reheat piping assembly 50 includes a reheat water supply pipe 51 and a reheat water return pipe 53. The reheat water supply pipe 51 is connected between the hot water outlet of the heat pump condenser and the hot water inlet of the reheat heat exchange plate 14. The reheat water return pipe 53 is connected between the hot water outlet of the reheat heat exchange plate 14 and the hot water inlet of the heat pump condenser, so that the hot water outlet of the heat pump water circulation pipe, the reheat water supply pipe 51, the reheat heat exchange plate 14, the reheat water return pipe 53 and the hot water inlet of the heat pump water circulation pipe are sequentially connected to form a reheat water circulation path for hot water circulation.

[0051] It is worth mentioning that in this application, the hot water outlet of the heat pump water circulation pipe is connected to the pretreatment water supply pipe 21 and the reheat water supply pipe 51 through a main outlet pipe, and the hot water inlet of the heat pump water circulation pipe is connected to the pretreatment return water pipe 23 and the reheat return water pipe 53 through a main inlet pipe.

[0052] When reheating, the hot water output from the hot water outlet of the heat pump water circulation pipe (the direction of hot water flow is as follows) Figure 2The hot water flows to the reheating heat exchange plate 14 through the reheating water supply pipe 51 (the direction of the flow of the hot water is indicated by the arrow c), supplies heat to the reheating heat exchange plate 14, and makes the temperature of the reheating heat exchange plate 14 rise, so that the reheating heat exchange plate 14 can reheat the air. The temperature of the hot water after the supply of heat decreases, and the hot water flows back to the heat pump condenser from the hot water inlet end of the heat pump water circulation pipe under the action of the reheating water return pipe 53 (the direction of the flow of the hot water is indicated by the arrow d). Figure 2 The hot water flows to the reheating heat exchange plate 14 through the reheating water supply pipe 51 (the direction of the flow of the hot water is indicated by the arrow c), supplies heat to the reheating heat exchange plate 14, and makes the temperature of the reheating heat exchange plate 14 rise, so that the reheating heat exchange plate 14 can reheat the air. The temperature of the hot water after the supply of heat decreases, and the hot water flows back to the heat pump condenser from the hot water inlet end of the heat pump water circulation pipe under the action of the reheating water return pipe 53 (the direction of the flow of the hot water is indicated by the arrow d).

[0053] The heat recovery pipe assembly 60 comprises a heat recovery pipe 61 which is connected between the reheating water return pipe 53 and the precooling water supply pipe 21.

[0054] The precooling water machine is a medium-temperature water machine, and comprises a precooling compressor, a precooling condenser, and a precooling evaporator. The precooling evaporator is a double-pipe evaporator, and has a precooling refrigerant circulation pipe and a precooling water circulation pipe. The precooling compressor, the precooling condenser, and the precooling refrigerant circulation pipe are sequentially connected and form a precooling refrigerant circulation path for the circulation of the refrigerant.

[0055] The precooling pipe assembly 30 comprises a precooling water supply pipe 31 and a precooling water return pipe 33. The precooling water supply pipe 31 is connected between the cold water outlet end of the precooling evaporator and the cold water inlet end of the precooling heat exchange plate 12. The precooling water return pipe 33 is connected between the cold water outlet end of the precooling heat exchange plate 12 and the cold water inlet end of the precooling evaporator.

[0056] Specifically, the cold water outlet end of the precooling evaporator is the cold water outlet end of the precooling water circulation pipe, and the cold water inlet end of the precooling evaporator is the cold water inlet end of the precooling water circulation pipe. Therefore, the cold water outlet end of the precooling water circulation pipe, the precooling water supply pipe 31, the precooling heat exchange plate 12, the precooling water return pipe 33, and the cold water inlet end of the precooling water circulation pipe are sequentially connected and form a precooling water circulation path for the circulation of the cold water.

[0057] During precooling, the cold water output from the cold water outlet end of the precooling water circulation pipe (the direction of the flow of the cold water is indicated by the arrow e) flows to the precooling heat exchange plate 12 through the precooling water supply pipe 31, supplies cold to the precooling heat exchange plate 12, and makes the temperature of the precooling heat exchange plate 12 decrease, so that the precooling heat exchange plate 12 can precool the air. The temperature of the cold water after the supply of cold increases, and the cold water flows back to the precooling evaporator from the cold water inlet end of the precooling water circulation pipe under the action of the precooling water return pipe 33 (the direction of the flow of the cold water is indicated by the arrow f). Figure 3 The hot water flows to the reheating heat exchange plate 14 through the reheating water supply pipe 51 (the direction of the flow of the hot water is indicated by the arrow c), supplies heat to the reheating heat exchange plate 14, and makes the temperature of the reheating heat exchange plate 14 rise, so that the reheating heat exchange plate 14 can reheat the air. The temperature of the hot water after the supply of heat decreases, and the hot water flows back to the heat pump condenser from the hot water inlet end of the heat pump water circulation pipe under the action of the reheating water return pipe 53 (the direction of the flow of the hot water is indicated by the arrow d). Figure 3 The hot water flows to the reheating heat exchange plate 14 through the reheating water supply pipe 51 (the direction of the flow of the hot water is indicated by the arrow c), supplies heat to the reheating heat exchange plate 14, and makes the temperature of the reheating heat exchange plate 14 rise, so that the reheating heat exchange plate 14 can reheat the air. The temperature of the hot water after the supply of heat decreases, and the hot water flows back to the heat pump condenser from the hot water inlet end of the heat pump water circulation pipe under the action of the reheating water return pipe 53 (the direction of the flow of the hot water is indicated by the arrow d).

[0058] The recooling chiller is a low-temperature chiller. The recooling chiller includes a recooling compressor, a recooling condenser, and a recooling evaporator. The recooling evaporator is a dual-tube evaporator and has a recooling refrigerant circulation pipe and a recooling water circulation pipe. The recooling compressor, recooling condenser, and recooling refrigerant circulation pipe are connected in sequence to form a recooling refrigerant circulation path for refrigerant circulation.

[0059] The recooling piping assembly 40 includes a recooling water supply pipe 41 and a recooling water return pipe 43. The recooling water supply pipe 41 is connected between the cold water outlet of the recooling evaporator and the cold water inlet of the recooling heat exchange plate 13. The recooling water return pipe 43 is connected between the cold water outlet of the recooling heat exchange plate 13 and the cold water inlet of the recooling evaporator.

[0060] Specifically, the cold water outlet of the recooling evaporator is the same as the cold water outlet of the recooling water circulation pipe, and the cold water inlet of the recooling evaporator is the same as the cold water inlet of the recooling water circulation pipe. Therefore, the cold water outlet of the recooling water circulation pipe, the recooling water supply pipe 41, the recooling heat exchange plate 13, the recooling return water pipe 43, and the cold water inlet of the recooling water circulation pipe are connected in sequence to form a recooling water circulation path for supplying cold water circulation.

[0061] When it cools down, the cold water output from the cold water outlet of the recooling water circulation pipe (the direction of cold water flow is as follows) Figure 3 (Indicated by the middle arrow g) The water flows through the recooling supply pipe 41 to the recooling heat exchange plate 13, cooling the recooling heat exchange plate 13 and lowering its temperature, thus recooling the air. After cooling, the water temperature rises and, under the action of the recooling return pipe 43, flows back from the cold water inlet of the recooling water circulation pipe to the recooling evaporator (the direction of the cold water return is as follows). Figure 3 (As indicated by the middle arrow h), and after exchanging heat with the refrigerant in the refrigerant circulation pipe, the temperature decreases, forming cold water at an even lower temperature, which is then output and circulated again.

[0062] The fresh air conditioning system 100 has a high temperature and high humidity treatment mode and a low temperature and low humidity treatment mode. The high temperature and high humidity treatment mode is mainly used to cool and dehumidify the air in summer, while the low humidity and low temperature treatment mode is mainly used to heat the air in winter.

[0063] In the existing technology, in the high temperature and high humidity treatment mode, the pretreatment heat exchange plate 11 and the pretreatment pipe assembly 20 of the fresh air air conditioning system 100 do not work, and the air completes the cooling and dehumidification in sequence according to the pre-cooling, re-cooling and reheating process.

[0064] In the present application, due to the arrangement of the heat recovery pipe assembly 60, in the high-temperature and high-humidity processing mode, the preconditioning heat exchange plate 11 and the preconditioning pipe assembly 20 are both working, and the air is sequentially cooled and dehumidified in the processes of pre-cooling, pre-cooling, re-cooling and reheating. In the present application, in the high-temperature and high-humidity processing mode, the preconditioning heat exchange plate 11 is used as a cold plate to pre-cool the air, the pre-cooling heat exchange plate 12 pre-cools the air, the re-cooling heat exchange plate 13 re-cools and dehumidifies the air, and the reheating heat exchange plate 14 warms up the air.

[0065] Specifically, the heat recovery pipe 61 is configured to guide the return water in the re-heating return water pipe 53 to the preconditioning water supply pipe 21 in the high-temperature and high-humidity processing mode. Since the return water in the re-heating return water pipe 53 is hot water after heating for the re-heating heat exchange plate 14, the temperature of the hot water decreases after heating, and is usually lower than the temperature of the air in the workshop environment. Therefore, the hot water can be used as cold water and supply cold to the air. In actual operation, the hot water in the re-heating return water pipe 53 flows to the preconditioning water supply pipe 21 through the heat recovery pipe 61, then flows into the preconditioning heat exchange plate 11 through the preconditioning water supply pipe 21, and supplies cold to the preconditioning heat exchange plate 11, so that the preconditioning heat exchange plate 11 can pre-cool the air. After that, the temperature of the hot water increases and returns to the heat pump condenser through the preconditioning return water pipe 23, and after continuous heating, it is sent into the re-heating heat exchange plate 14 through the re-heating water supply pipe 51, and supplies heat to the re-heating heat exchange plate 14, and so on.

[0066] As can be seen from the above, in the present application, by designing the heat recovery pipe 61, the hot water in the re-heating return water pipe 53 can be used as a cold source to supply cold to the preconditioning heat exchange plate 11. In this way, in the high-temperature and high-humidity mode, before pre-cooling the air, the new air conditioning system 100 can also use the hot water with lower temperature in the re-heating return water pipe 53 to pre-cool the air, so as to reduce the cooling load of the subsequent pre-cooling chiller and re-cooling chiller, thereby reducing the electricity cost and energy consumption of the new air conditioning system 100.

[0067] In the low-temperature and low-humidity processing mode, the pre-cooling heat exchange plate 12, the re-cooling heat exchange plate 13, the pre-cooling chiller, the pre-cooling pipe assembly 30, the re-cooling chiller, the re-cooling pipe assembly 40 and the heat recovery pipe 61 are all not working, and the air is sequentially warmed up in the processes of pre-heating and re-heating.

[0068] It is worth mentioning that, in the present application, the preconditioning heat exchange plate 11 is used as a hot plate in the low-temperature and low-humidity processing mode to pre-heat the air.

[0069] Please continue to refer to Figure 1 and Figure 2In some embodiments, the heat recovery pipeline assembly 60 further comprises a heat recovery valve 62, which is arranged on the heat recovery pipe 61 and configured to be opened in the high-temperature and high-humidity processing mode.

[0070] When the fresh air conditioning system 100 is in the high-temperature and high-humidity mode, the heat recovery valve 62 is opened, and the hot water in the reheating return water pipe 53 flows into the pre-treatment water supply pipe 21 through the heat recovery pipe 61 and the pre-treatment water supply pipe 21 in turn, and supplies cold to the pre-treatment heat exchange plate 11, so as to pre-cool the air before pre-cooling. When the fresh air conditioning system 100 is in the low-temperature and low-humidity mode, the heat recovery valve 62 is closed, and the hot water in the reheating return water pipe 53 is directly returned to the heat pump condenser for heating and output, and is only used to supply heat to the reheating heat exchange plate 14.

[0071] Therefore, the arrangement of the heat recovery valve 62 can ensure that the hot water in the reheating return water pipe 53 flows into the pre-treatment water supply pipe 21 through the heat recovery pipe 61 in the high-temperature and high-humidity mode, and can block the hot water in the reheating return water pipe 53 from flowing into the pre-treatment water supply pipe 21 through the heat recovery pipe 61 in the low-temperature and low-humidity mode, so that the mode switching of the fresh air conditioning system 100 is more reliable.

[0072] In some embodiments, the pre-treatment pipeline assembly 20 further comprises a pre-treatment water supply valve 22, which is arranged on the pre-treatment water supply pipe 21 and located upstream of the intersection of the heat recovery pipe 61 and the pre-treatment water supply pipe 21, and is configured to be closed in the high-temperature and high-humidity processing mode.

[0073] In the high-temperature and high-humidity mode, the pre-treatment water supply valve 22 is closed, so that the hot water with a higher temperature in the heat pump condenser does not flow along the pre-heating water circulation path, but flows along the heat recovery circulation path of the hot water outlet end of the heat pump water circulation pipe, the reheating water supply pipe 51, the reheating heat exchange plate 14, the reheating return water pipe 53, the heat recovery pipe 61, the pre-treatment water supply pipe 21, the pre-treatment heat exchange plate 11, the pre-treatment return water pipe 23, and the hot water inlet end of the heat pump water circulation pipe, so as to pre-cool the air before pre-cooling. In the low-temperature and low-humidity mode, the pre-treatment water supply valve 22 is opened, and the hot water with a higher temperature in the heat pump condenser flows along the pre-heating water circulation path and supplies heat to the pre-treatment heat exchange plate 11 to heat the pre-treatment heat exchange plate 11.

[0074] The design of the pre-treatment water supply valve 22 ensures that the pre-treatment pipeline assembly 20 can circulate hot water with different temperatures in different modes, and the mode switching of the fresh air conditioning system 100 is more reliable.

[0075] In some embodiments, the pre-treatment pipeline assembly 20 further comprises a pre-treatment return water valve 24, which is arranged on the pre-treatment return water pipe 23 and configured to be opened in the high-temperature and high-humidity processing mode.

[0076] In the high-temperature and high-humidity processing mode and the low-temperature and low-humidity processing mode, the pre-treatment return water valve 24 is opened, so that the hot water after heat exchange with the pre-treatment heat exchange plate 11 can flow back to the heat pump condenser for recirculation.

[0077] In some embodiments, the pre-treatment pipeline assembly 20 further comprises a pre-treatment bypass pipe 25 and a pre-treatment bypass valve 26. The opposite ends of the pre-treatment bypass pipe 25 intersect and communicate with the pre-treatment return water pipe 23. One end of the pre-treatment bypass pipe 25 intersects the pre-treatment return water pipe 23 upstream of the pre-treatment return water valve 24, and the other end of the pre-treatment bypass pipe 25 intersects the pre-treatment return water pipe 23 downstream of the pre-treatment return water valve 24. The pre-treatment bypass valve 26 is arranged on the pre-treatment bypass pipe 25.

[0078] No matter whether the fresh air conditioning system 100 is in the high-temperature and high-humidity mode or the low-temperature and low-humidity mode, when the pre-treatment return water valve 24 can be normally opened, the pre-treatment bypass valve 26 is closed, and the hot water flows back to the heat pump condenser through the pre-treatment return water pipe 23. When the pre-treatment return water valve 24 cannot be opened, the pre-treatment bypass valve 26 is opened, and the hot water flows back to the heat pump condenser through the pre-treatment bypass pipe 25.

[0079] The arrangement of the pre-treatment bypass pipe 25 and the pre-treatment bypass valve 26 increases the path of the hot water flowing back to the heat pump condenser. When the path of the pre-treatment return water pipe 23 fails, the hot water flows back through the path of the pre-treatment bypass pipe 25. This design improves the reliability of the fresh air conditioning system 100.

[0080] In some embodiments, the reheat pipeline assembly 50 further comprises a reheat return water valve 54. The reheat return water valve 54 is arranged on the reheat return water pipe 53 and located downstream of the intersection of the heat recovery pipe 61 and the reheat return water pipe 53. The reheat return water valve 54 is configured to be closed in the high-temperature and high-humidity processing mode.

[0081] In the high-temperature and high-humidity mode, the reheat return water valve 54 is closed. Therefore, the hot water that needs to exchange heat with the reheat heat exchange plate 14 does not flow along the reheat water circulation path, but flows along the heat recovery circulation path, so that the air before pre-cooling can be pre-cooled, and the air after re-cooling can be reheated. In the low-temperature and low-humidity mode, the reheat return water valve 54 is opened, and the hot water with a higher temperature in the heat pump condenser flows along the reheat water circulation path and supplies heat to the reheat heat exchange plate 14.

[0082] The design of the reheat return water valve 54 ensures that hot water with different temperatures can flow in the reheat return water pipe 53 in different modes, and the mode switching of the fresh air conditioning system 100 is more reliable.

[0083] In some embodiments, the pre-treatment pipeline assembly 20 further comprises a reheat bypass pipe 55 and a reheat bypass valve 56. The reheat bypass pipe 55 is intersected and communicated with the reheat return water pipe 53 at two opposite ends. The intersection point of one end of the reheat bypass pipe 55 with the reheat return water pipe 53 is located upstream of the reheat return water valve 54, and the intersection point of the other end of the reheat bypass pipe 55 with the reheat return water pipe 53 is located downstream of the reheat return water valve 54. The reheat bypass valve 56 is arranged on the reheat bypass pipe 55.

[0084] Regardless of whether the fresh air conditioning system 100 is in the high-temperature and high-humidity mode or the low-temperature and low-humidity mode, when the reheat return water valve 54 can be normally opened, the reheat bypass valve 56 is closed, and the hot water returns to the heat pump condenser through the reheat return water pipe 53. When the reheat return water valve 54 cannot be opened, the reheat bypass valve 56 is opened, and the hot water returns to the heat pump condenser through the reheat bypass pipe 55.

[0085] The arrangement of the reheat bypass pipe 55 and the reheat bypass valve 56 increases the path of the hot water returning to the heat pump condenser. When the path of the reheat return water pipe 53 fails, the hot water returns through the path of the reheat bypass pipe 55. This design improves the reliability of the fresh air conditioning system 100.

[0086] In some embodiments, the reheat pipeline assembly 50 further comprises a reheat water supply valve 52. The reheat water supply valve 52 is arranged on the reheat water supply pipe 51 and is configured to be opened in the high-temperature and high-humidity treatment mode.

[0087] In the high-temperature and high-humidity treatment mode and the low-temperature and low-humidity treatment mode, the reheat water supply valve 52 is opened, so that the hot water in the heat pump condenser can be input into the reheat heat exchange plate 14 through the reheat water supply pipe 51 to supply heat to the reheat heat exchange plate 14.

[0088] In some embodiments, the pre-cooling pipeline assembly 30 further comprises a pre-cooling water supply valve 32 and a pre-cooling water return valve 34. The pre-cooling water supply valve 32 is arranged on the pre-cooling water supply pipe 31, and the pre-cooling water return valve 34 is arranged on the pre-cooling water return pipe 33. The pre-cooling water supply valve 32 and the pre-cooling water return valve 34 are both configured to be opened in the high-temperature and high-humidity treatment mode.

[0089] In the high-temperature and high-humidity mode, the pre-cooling water supply valve 32 and the pre-cooling water return valve 34 are both opened, so that the cold water can flow in the pre-cooling water circulation path to supply cold to the pre-cooling heat exchange plate 12, thereby achieving pre-cooling of the air. In the low-temperature and low-humidity mode, the pre-cooling water supply valve 32 and the pre-cooling water return valve 34 are both closed, and the pre-cooling heat exchange plate 12 stops supplying cold.

[0090] By arranging the pre-cooling water supply valve 32 and the pre-cooling water return valve 34, the fresh air conditioning system 100 can be switched in different modes, and the switching is reliable.

[0091] Please refer to Figure 1 and Figure 3In some embodiments, the precooling pipeline assembly 30 further comprises a precooling bypass pipe 35 and a precooling bypass valve 36. The precooling bypass pipe 35 is intersected and communicated with the precooling return water pipe 33 at two opposite ends. The intersection point of one end of the precooling bypass pipe 35 with the precooling return water pipe 33 is located upstream of the precooling return water valve 34, and the intersection point of the other end of the precooling bypass pipe 35 with the precooling return water pipe 33 is located downstream of the precooling return water valve 34. The precooling bypass valve 36 is arranged on the precooling bypass pipe 35.

[0092] When the precooling return water valve 34 can be normally opened, the precooling bypass valve 36 is closed, and the chilled water returns to the precooling evaporator through the precooling return water pipe 33 when the precooling return water valve 34 cannot be opened. The precooling bypass valve 36 is opened, and the chilled water returns to the precooling evaporator through the precooling bypass pipe 35 when the precooling return water valve 34 cannot be opened.

[0093] The precooling bypass pipe 35 and the precooling bypass valve 36 increase the path of the chilled water returning to the precooling evaporator. When the path of the precooling return water pipe 33 fails, the chilled water returns through the path of the precooling bypass pipe 35. This design improves the reliability of the operation of the fresh air conditioning system 100.

[0094] In some embodiments, the recooling pipeline assembly 40 further comprises a recooling water supply valve 42 and a recooling return water valve 44. The recooling water supply valve 42 is arranged on the recooling water supply pipe 41, and the recooling return water valve 44 is arranged on the recooling return water pipe 43. The recooling water supply valve 42 and the recooling return water valve 44 are configured to be opened in the high-temperature and high-humidity treatment mode.

[0095] In the high-temperature and high-humidity mode, the recooling water supply valve 42 and the recooling return water valve 44 are opened, so that the chilled water can flow in the recooling water circulation path to supply cold to the recooling heat exchange plate 13, thereby achieving air recooling. In the low-temperature and low-humidity mode, the recooling water supply valve 42 and the recooling return water valve 44 are closed, and the recooling heat exchange plate 13 stops supplying cold.

[0096] By arranging the recooling water supply valve 42 and the recooling return water valve 44, the fresh air conditioning system 100 can be switched in different modes, and the switching is reliable.

[0097] In some embodiments, the recooling pipeline assembly 40 further comprises a recooling bypass pipe 45 and a recooling bypass valve 46. The recooling bypass pipe 45 is intersected and communicated with the recooling return water pipe 43 at two opposite ends. The intersection point of one end of the recooling bypass pipe 45 with the recooling return water pipe 43 is located upstream of the recooling return water valve 44, and the intersection point of the other end of the recooling bypass pipe 45 with the recooling return water pipe 43 is located downstream of the recooling return water valve 44. The recooling bypass valve 46 is arranged on the recooling bypass pipe 45.

[0098] When the fresh air conditioning system 100 is in the high temperature and high humidity mode, the recooling return water valve 44 can be normally opened, and the recooling bypass valve 46 is closed, so that the cold water returns to the recooling evaporator through the recooling return water pipe 43, and when the recooling return water valve 44 cannot be opened, the recooling bypass valve 46 is opened, so that the cold water returns to the recooling evaporator through the recooling bypass pipe 45.

[0099] The recooling bypass pipe 45 and the recooling bypass valve 46 are arranged to increase the path of the cold water returning to the recooling evaporator, so that when the path of the recooling return water pipe 43 fails, the cold water returns through the path of the recooling bypass pipe 45, and the design improves the reliability of the fresh air conditioning system 100.

[0100] The fresh air conditioning system 100 described above can use the hot water in the reheat return water pipe 53 as a cold source to cool the pre-processing heat exchange plate 11 through the design of the heat recovery pipe 61, so that in the high temperature and high humidity mode, the fresh air conditioning system 100 can also use the hot water with lower temperature in the reheat return water pipe 53 to precool the air before precooling the air, so as to reduce the cooling load of the subsequent precooling chiller and the recooling chiller, thereby reducing the power consumption and energy consumption of the fresh air conditioning system 100.

[0101] The technical features of the above-described embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0102] The above-described embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A fresh air conditioning system, characterized in that, The fresh air conditioning system has a high temperature and high humidity treatment mode, and the fresh air conditioning system includes: The fresh air handling unit (10) includes a pretreatment heat exchange plate (11) and a reheat heat exchange plate (14); Heat pump units, including heat pump condensers; The pretreatment piping assembly (20) includes a pretreatment water supply pipe (21), which is connected between the hot water outlet of the heat pump condenser and the hot water inlet of the pretreatment heat exchange plate (11). A reheat piping assembly (50) includes a reheat return pipe (53) connected between the hot water outlet of the reheat heat exchange plate (14) and the hot water inlet of the heat pump condenser; and A heat recovery piping assembly (60) includes a heat recovery pipe (61) connected between the reheat return water pipe (53) and the pretreatment water supply pipe (21), and is configured to guide the return water in the reheat return water pipe (53) to the pretreatment water supply pipe (21) under the high temperature and high humidity treatment mode.

2. The fresh air conditioning system according to claim 1, characterized in that, The heat recovery pipeline assembly (60) further includes a heat recovery valve (62), which is disposed on the heat recovery pipe (61) and is configured to open in the high temperature and high humidity treatment mode.

3. The fresh air conditioning system according to claim 1, characterized in that, The pretreatment pipeline assembly (20) further includes a pretreatment water supply valve (22), which is disposed on the pretreatment water supply pipe (21) and located upstream of the junction of the heat recovery pipe (61) and the pretreatment water supply pipe (21). The pretreatment water supply valve (22) is configured to be closed in the high temperature and high humidity treatment mode.

4. The fresh air conditioning system according to claim 1, characterized in that, The pretreatment pipeline assembly (20) also includes a pretreatment return water pipe (23) and a pretreatment return water valve (24). The pretreatment return water pipe (23) is connected between the hot water outlet of the pretreatment heat exchange plate (11) and the hot water inlet of the heat pump condenser. The pretreatment return water valve (24) is installed on the pretreatment return water pipe (23) and is configured to open in the high temperature and high humidity treatment mode.

5. The fresh air conditioning system according to claim 1, characterized in that, The reheat pipe assembly (50) further includes a reheat return water valve (54), which is disposed on the reheat return water pipe (53) and located downstream of the junction of the heat recovery pipe (61) and the reheat return water pipe (53). The reheat return water valve (54) is configured to be closed in the high temperature and high humidity treatment mode.

6. The fresh air conditioning system according to claim 1, characterized in that, The reheat pipeline assembly (50) also includes a reheat water supply pipe (51) and a reheat water supply valve (52). The reheat water supply pipe (51) is connected between the hot water outlet of the heat pump condenser and the hot water inlet of the reheat heat exchange plate (14). The reheat water supply valve (52) is installed on the reheat water supply pipe (51) and is configured to open in the high temperature and high humidity treatment mode.

7. The fresh air conditioning system according to claim 1, characterized in that, The fresh air handling unit (10) also includes a pre-cooling heat exchange plate (12); The fresh air conditioning system also includes a pre-cooling chiller and a pre-cooling pipe assembly (30). The pre-cooling chiller includes a pre-cooling evaporator. The pre-cooling pipe assembly (30) includes a pre-cooling water supply pipe (31) and a pre-cooling water return pipe (33). The pre-cooling water supply pipe (31) is connected between the cold water outlet of the pre-cooling evaporator and the cold water inlet of the pre-cooling heat exchange plate (12). The pre-cooling water return pipe (33) is connected between the cold water outlet of the pre-cooling heat exchange plate (12) and the cold water inlet of the pre-cooling evaporator.

8. The fresh air conditioning system according to claim 7, characterized in that, The precooling pipeline assembly (30) also includes a precooling water supply valve (32) and a precooling water return valve (34). The precooling water supply valve (32) is disposed on the precooling water supply pipe (31), and the precooling water return valve (34) is disposed on the precooling water return pipe (33). Both the precooling water supply valve (32) and the precooling water return valve (34) are configured to open under the high temperature and high humidity treatment mode.

9. The fresh air conditioning system according to claim 1, characterized in that, The fresh air handling unit (10) also includes a recooling heat exchange plate (13); The fresh air conditioning system also includes a recooling chiller and a recooling pipe assembly (40). The recooling chiller includes a recooling evaporator. The recooling pipe assembly (40) includes a recooling water supply pipe (41) and a recooling water return pipe (43). The recooling water supply pipe (41) is connected between the cold water outlet of the recooling evaporator and the cold water inlet of the recooling heat exchange plate (13). The recooling water return pipe (43) is connected between the cold water outlet of the recooling heat exchange plate (13) and the cold water inlet of the recooling evaporator.

10. The fresh air conditioning system according to claim 9, characterized in that, The recooling pipeline assembly (40) further includes a recooling water supply valve (42) and a recooling water return valve (44). The recooling water supply valve (42) is disposed on the recooling water supply pipe (41), and the recooling water return valve (44) is disposed on the recooling water return pipe (43). Both the recooling water supply valve (42) and the recooling water return valve (44) are configured to open under the high temperature and high humidity treatment mode.

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