Environment optimization system

Abstract

The present application relates to an environment optimization system. The environment optimization system comprises a fresh air device (200) and a refrigeration-heating device (400). The fresh air device (200) and the refrigeration-heating device (400) are combined with each other, so that a part of the refrigeration-heating working fluid circuit (CL) participates in the temperature and humidity adjustment of the fresh air device (200) on fresh air, and / or so that a part of the fresh air working fluid circuit (FL) participates in the cooling and / or heating of the predetermined space by the refrigeration-heating device (400). The fresh air working fluid circuit (FL) and the refrigeration-heating working fluid circuit (CL) are independent of each other and not connected to each other. According to the present application, the two circuits are combined with each other and independent of each other and not connected to each other, which effectively improves the working performance, equipment cost and overall energy consumption of the environment optimization system.

Description

Technical Field

[0001] This invention relates to the field of air conditioning and heating, and more specifically, to an environmental optimization system that improves temperature and humidity control in a predetermined space. Background Technology

[0002] Currently, there are environmental optimization systems for regulating the temperature, humidity, and cleanliness of air in a predetermined space (e.g., an indoor space). Environmental optimization systems include, for example, air conditioning systems for cooling and / or heating, fresh air systems for providing fresh air, or combinations thereof.

[0003] Firstly, current environmental optimization systems often only have air conditioning (cooling / heating) systems and lack fresh air systems. This results in a focus on temperature control rather than independent control of temperature and humidity, leading to poor humidity regulation (insufficient or excessive dehumidification). Furthermore, using the air conditioning system itself for dehumidification causes a drop in indoor temperature, creating a cold and uncomfortable feeling for users. Additionally, the condensate from the dehumidifier terminals can easily breed bacteria. Moreover, the lack of a fresh air system leads to poor indoor air quality and reduced oxygen levels.

[0004] Secondly, current environmental optimization systems have proposed incorporating fresh air systems in addition to air conditioning systems. However, the air conditioning and fresh air systems are completely independent of each other, making it impossible for them to coordinate and assist each other to achieve unified and effective temperature and humidity control, resulting in higher overall energy consumption and equipment costs. Furthermore, the dehumidification capacity and efficiency of the adopted fresh air systems are weak, making it difficult to remove all indoor moisture loads through fresh air dehumidification, thus hindering the construction of an independent temperature and humidity control system. The concept of independent temperature and humidity control is to use a fresh air system for deep dehumidification to handle all moisture loads from both fresh air and the indoor environment, and then use the indoor terminals of the air conditioning system to remove sensible heat loads. In the case of a water-cooled system, for example, since the fresh air system handles all moisture loads through deep dehumidification, the indoor sensible heat load can be handled by higher-temperature chilled water (e.g., high-temperature chilled water above the dew point of 18 degrees Celsius), thereby improving the overall energy efficiency of the system and enhancing indoor comfort.

[0005] In summary, in this field, there is room and need for improvement in the control of the degree of organic integration and relative independence between air conditioning systems (cooling-heating systems) and fresh air systems, and consequently in the control of the performance and energy efficiency of environmental optimization systems.

[0006] The content in this section only provides background information related to this invention and may not constitute prior art. Summary of the Invention

[0007] This section provides a general summary of the invention, rather than a full disclosure of the entire scope or all features of the invention.

[0008] One object of the present invention is to provide an environmental optimization system that improves temperature and humidity control by combining and coordinating two loops together.

[0009] Another objective of this invention is to provide an environmental optimization system that reduces overall energy consumption and equipment costs by enabling the two circuits to coordinate and assist each other through mutual integration.

[0010] Another object of the present invention is to provide an environmental optimization system that enables independent and efficient adjustment of the operating state and parameters of each loop by making the two loops independent of each other and not connected to each other.

[0011] Another objective of this invention is to provide an environmental optimization system that simplifies the system and improves its reliability through the ingenious design of component installation positions and combinations.

[0012] Another object of the present invention is to provide an environment-optimized system that allows each circuit to have different working fluid return pressures by having different compression mechanism inlets in the dual circuits, and avoids additional power consumption caused by pressure reduction.

[0013] To achieve one or more of the above objectives, according to the present invention, an environmental optimization system is provided. The environmental optimization system includes: a fresh air device for providing fresh air to a predetermined space and including a fresh air working fluid circuit, the fresh air device being adapted to regulate the humidity and / or temperature of the fresh air through the fresh air working fluid circuit; and a cooling-heating device, the cooling-heating device including a cooling-heating working fluid circuit adapted to cool and / or heat the predetermined space through the cooling-heating working fluid circuit. The fresh air device and the cooling-heating device are coupled such that a portion of the cooling-heating working fluid circuit participates in the temperature and humidity regulation of the fresh air by the fresh air device, and / or such that a portion of the fresh air working fluid circuit participates in the cooling and / or heating of the predetermined space by the cooling-heating device. The fresh air working fluid circuit and the cooling-heating working fluid circuit are independent of each other and not connected to each other, or the fresh air working fluid circuit and the cooling-heating working fluid circuit share a single compressor and are connected to each other, and the compression mechanism of the single compressor is provided with a first suction port for the fresh air working fluid circuit and a second suction port for the cooling-heating working fluid circuit.

[0014] According to the above technical solution, a dual refrigerant loop cold source is adopted (i.e., a fresh air working fluid loop and a cooling-heating working fluid loop), and these two loops are not completely independent but interconnected. For example, a portion of the cooling-heating working fluid loop participates in the temperature and humidity regulation of the fresh air by the fresh air unit. Therefore, efficient and deep dehumidification of the fresh air is achieved, and dehumidification of the indoor space can be achieved solely through the dehumidification of the fresh air, thus realizing the concept of independent temperature and humidity control. In addition, the coordinated and auxiliary control of temperature and humidity by the two loops can also reduce overall energy consumption and equipment costs. Furthermore, according to the above technical solution, the fresh air working fluid loop and the cooling-heating working fluid loop are independent and not interconnected, and each loop has its own compressor. Therefore, compared with related technical solutions where the two loops are interconnected (e.g., sharing a single compressor), the operating state and parameters of each loop can be independently adjusted according to actual needs, such as independently and effectively adjusting the working fluid pressure of each loop. This ensures that the environmental optimization system can appropriately control the temperature and humidity of the indoor space according to actual needs.

[0015] In the environmental optimization system according to the present invention, the fresh air device is provided with a dehumidification section suitable for low-temperature dehumidification of fresh air, and the fresh air working fluid circuit includes a fresh air condenser and a fresh air evaporator located downstream of the fresh air condenser, the fresh air evaporator serving as the dehumidification section. In this way, by setting up a dedicated fresh air working fluid circuit and using the fresh air evaporator in the fresh air working fluid circuit as the dehumidification section, deep dehumidification of fresh air can be effectively achieved.

[0016] In the environmental optimization system according to the present invention, the fresh air device is further provided with a reheat section suitable for heating the fresh air, and the fresh air working fluid circuit further includes a secondary fresh air condenser located downstream of the fresh air condenser and upstream of the fresh air evaporator, the secondary fresh air condenser serving as the reheat section. In this way, by providing a secondary fresh air condenser located downstream of the fresh air condenser to reheat the fresh air, it is possible to prevent excessively cold fresh air from entering the indoor space and causing discomfort to users. Simultaneously, since the reheat section utilizes condensation waste heat, it saves reheat energy waste and increases the system subcooling, thus achieving efficient operation of the dehumidification system.

[0017] In the environmental optimization system according to the present invention, an upstream pipeline connected to the auxiliary fresh air condenser and the fresh air evaporator, thereby bypassing the auxiliary fresh air condenser, is provided, and a throttling valve is provided in the bypass pipeline. In this way, by providing the bypass pipeline and its throttling valve, the degree of reheating of the fresh air in the reheat section can be appropriately adjusted by regulating the opening or closing or the opening degree of the throttling valve.

[0018] In the environmental optimization system according to the present invention, the fresh air device includes a fresh air device body, and the fresh air working fluid circuit further includes a fresh air compressor. The fresh air working fluid circuit, including the fresh air compressor, the fresh air condenser, the auxiliary fresh air condenser, and the fresh air evaporator, is integrally arranged within the fresh air device body. In this way, by arranging the fresh air working fluid circuit integrally within the fresh air device body, the structure of the combined water chiller outdoor unit is simplified, and the piping of the fresh air working fluid circuit becomes simpler and more reliable.

[0019] In the environmental optimization system according to the present invention, the fresh air unit includes an air supply passage and an air exhaust passage disposed within the unit body. The auxiliary fresh air condenser and the fresh air evaporator are arranged in the air supply passage, and the fresh air compressor and the fresh air condenser are arranged in the exhaust passage. In this manner, the internal components of the fresh air unit are rationally arranged, and the fresh air can be effectively dehumidified and reheated.

[0020] In the environmental optimization system according to the present invention, the cooling-heating working fluid circuit includes a cooling-heating evaporator, a first circuit, and a second circuit. The first circuit includes a cooling-heating compressor. The second circuit is capable of exchanging heat with the first circuit via the cooling-heating evaporator to cool a predetermined space. The cooling-heating working fluid circuit also includes a third circuit connected in parallel with the second circuit. The third circuit is guided to the fresh air condenser arranged in the fresh air unit body for heat exchange at the fresh air condenser. In this way, by using high-temperature chilled water for heat exchange at the fresh air condenser, the cooling condition of the fresh air condenser in the fresh air working fluid circuit is improved, thereby improving the circulation conditions of the fresh air working fluid circuit.

[0021] In the environmental optimization system according to the present invention, the fresh air device is provided with a pre-cooling section suitable for pre-cooling fresh air. The refrigeration-heating working fluid circuit includes a refrigeration-heating evaporator and a first circuit and a second circuit. The first circuit includes a refrigeration-heating compressor. The second circuit is capable of exchanging heat with the first circuit via the refrigeration-heating evaporator to cool a predetermined space. The first circuit also includes a secondary refrigeration-heating evaporator connected in series with and downstream of the refrigeration-heating evaporator, which serves as the pre-cooling section. Alternatively, the refrigeration-heating working fluid circuit also includes a fresh air pre-cooling circuit connected in parallel with the second circuit, which includes a fresh air pre-cooler serving as the pre-cooling section. In this way, by providing a pre-cooling section and employing a secondary refrigeration-heating evaporator and / or a fresh air pre-cooler, fresh air can be pre-cooled flexibly and effectively, thereby ensuring deep dehumidification of the fresh air. In particular, using a secondary refrigeration-heating evaporator to pre-cool the fresh air can pre-cool the fresh air more thoroughly, while using a fresh air pre-cooler can simplify the configuration of the refrigerant circuit (first circuit).

[0022] In the environmental optimization system according to the invention, the working fluid in the second loop is water, the second loop includes a terminal cooler suitable for cooling a predetermined space, and the cooling-heating working fluid loop further includes a space heating loop connected in parallel with the second loop, the space heating loop including a terminal heater suitable for heating the predetermined space. In this way, a so-called two-in-one water system is realized, thereby enabling the environmental optimization system to have both cooling and heating functions for indoor spaces.

[0023] In the environmental optimization system according to the invention, when the fresh air working fluid circuit and the cooling-heating working fluid circuit are independent and not interconnected, the fresh air working fluid circuit and the cooling-heating working fluid circuit each include: a fresh air compressor and a cooling-heating compressor, respectively; sharing a single compressor, and this single compressor includes two independent and unconnected compression mechanisms for the fresh air working fluid circuit and the cooling-heating working fluid circuit, respectively; or, sharing a single compression mechanism of a single compressor, and this single compression mechanism includes two independent and unconnected compression units for the fresh air working fluid circuit and the cooling-heating working fluid circuit, respectively. In this way, a suitable compression device to ensure the independence of the two circuits can be flexibly selected according to specific circumstances. In particular, for the latter two, the independence of the two circuits can be easily achieved using a single compressor.

[0024] In the environmental optimization system according to the present invention, the fresh air compressor and fresh air condenser included in the fresh air working fluid circuit, and the refrigeration-heating compressor and refrigeration-heating condenser included in the refrigeration-heating working fluid circuit, are combined in a single outdoor unit. In this way, a single outdoor unit design combining the main parts of two circuits is achieved, and the fresh air unit only has the fresh air evaporator and auxiliary fresh air condenser (reheat coil) of the fresh air working fluid circuit, thus making the system compact, efficient, and space-saving.

[0025] In the environmental optimization system according to the invention, the fresh air condenser included in the fresh air working fluid loop and the refrigeration-heating condenser included in the refrigeration-heating working fluid loop are combined together as a single heat exchanger. In this way, a dual-condenser combination in a dual-loop system is achieved, which further ensures a compact, efficient, and space-saving system, and simplifies the structure by requiring only a single condenser fan.

[0026] In the environmental optimization system according to the present invention, an air supply passage is provided in the body of the fresh air device, and a pre-cooling section, a dehumidification section, and a reheating section of the fresh air device are sequentially arranged from upstream to downstream in the air supply passage. In this way, by setting up three sections of fresh air treatment, the temperature and humidity of the fresh air are optimally regulated.

[0027] In the environmental optimization system according to the present invention, an exhaust air passage is further provided in the body of the fresh air device, and the fresh air device is further provided with a filter arranged in the supply air passage and a heat recovery unit extending from the supply air passage to the exhaust air passage, so that fresh air can flow sequentially through the filter, the heat recovery unit, the pre-cooling section, the dehumidification section and the reheating section in the supply air passage. In this way, optimal treatment of the fresh air is ensured, thereby ensuring that the fresh air supplied to the indoor space has optimal temperature, humidity and cleanliness. Attached Figure Description

[0028] The features and advantages of one or more embodiments of the present invention will become more readily understood from the following description with reference to the accompanying drawings, in which:

[0029] Figure 1 An environmental optimization system according to a first exemplary embodiment of the present invention is shown;

[0030] Figure 2 An environmental optimization system according to a second exemplary embodiment of the present invention is shown;

[0031] Figure 3 An environmental optimization system according to a third exemplary embodiment of the present invention is shown;

[0032] Figure 4An environmental optimization system according to a fourth exemplary embodiment of the present invention is shown. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments. This detailed description is for illustrative purposes only and is not intended to limit the invention or its applications or uses.

[0034] First, refer to Figure 1 Describing an environmental optimization system 100A according to a first exemplary embodiment of the present invention ( Figure 1 An environmental optimization system according to a first exemplary embodiment of the present invention is shown.

[0035] The environmental optimization system 100A may include a fresh air unit 200 and a cooling-heating unit 400.

[0036] Fresh air unit 200 is used to supply fresh air to a predetermined space (e.g., an indoor space). Fresh air unit 200 may include a fresh air working fluid loop FL, which is adapted to regulate the humidity, temperature, and / or cleanliness of the fresh air to be supplied to the predetermined space.

[0037] The fresh air unit 200 can include, along the fresh air working fluid circuit FL: a fresh air compressor 210, a fresh air four-way reversing valve 215, a fresh air condenser 220, a secondary fresh air condenser (reheat coil) 230, a one-way valve 233, a throttling valve (expansion valve) 235, a fresh air evaporator 240, and a fresh air receiver 250.

[0038] It should be noted here that the naming of some of the components is based on their actual function in the dehumidification and cooling mode of the fresh air working fluid circuit FL, which is used for low-temperature dehumidification and reheating of fresh air. For example, regarding the heat exchanger 220, it functions as a condenser in dehumidification mode, while in the opposite heating mode, it functions as an evaporator. Furthermore, it should be noted that although a series of components of the fresh air unit 200 are listed here as an example, it should be understood that some components can be omitted, and other suitable components are not excluded. For example, the auxiliary fresh air condenser 230 can be omitted if only low-temperature dehumidification of fresh air is required and reheating of fresh air is not necessary.

[0039] The fresh air unit 200 may include a fresh air unit body (fresh air handling unit body). An air supply passage FP and an exhaust passage BP may be provided within the fresh air unit body. In the illustrated example, an air supply fan F2 may be provided in the air supply passage FP. When the air supply fan F2 is activated, air can be drawn from the air supply passage FP... Figure 1The air is drawn from the left to the right to provide fresh air. In the example shown, an exhaust fan F3 can be installed in the exhaust passage BP. When the exhaust fan F3 is activated, air is drawn from the left side of the exhaust passage BP to the right side to provide fresh air. Figure 1 The air is drawn from the right side to the left to facilitate exhaust.

[0040] In the illustrated example, the fresh air unit 200 may also include a filter 262 arranged in the supply air passage FP and a heat recovery unit 264 extending from the supply air passage FP to the exhaust air passage BP. The filter 262 may be located upstream and is adapted to filter outdoor air to improve air cleanliness. In summer cooling mode, the heat recovery unit 264 is used to initially cool the filtered, high-temperature outdoor air; that is, the heat recovery unit 264 enables heat exchange between the high-temperature air in the outdoor supply air passage FP and the low-temperature air in the indoor exhaust air passage BP.

[0041] On the other hand, the cooling-heating device 400 may include a cooling-heating working fluid circuit CL, thereby being adapted to cool and / or heat a predetermined space via the cooling-heating working fluid circuit CL.

[0042] In a first embodiment, the cooling-heating working fluid circuit CL may include a first circuit CLa, a second circuit CLb, and a space heating circuit Cle. The space heating circuit Cle may be drawn out in parallel with the second circuit CLb.

[0043] The refrigeration-heating device 400 may include, along the first circuit CLa: a refrigeration-heating compressor 410, a refrigeration-heating four-way reversing valve 415, a refrigeration-heating condenser 420, a throttle valve (expansion valve) 425, a refrigeration-heating evaporator 430, a secondary refrigeration-heating evaporator 440, and a refrigeration-heating receiver 450.

[0044] Similarly, it should be noted that the naming of some of the components mentioned above is based on their actual function in the first loop CLa during cooling mode. For example, the cooling-heating evaporator 430 functions as an evaporator in cooling mode and as a condenser in the opposite heating mode. Furthermore, it should be noted that although a series of components of the cooling-heating device 400 are listed here as an example, it should be understood that some components can be omitted, and other suitable components are not excluded. For example, the auxiliary cooling-heating evaporator 440 can be omitted if pre-cooling of fresh air is not required.

[0045] The cooling-heating device 400 may include, along the second circuit CLb, a pump 460, a three-way reversing valve 465, and a terminal cooler 480. Furthermore, the cooling-heating device 400 may include a terminal heater 490 along the space heating circuit Cle.

[0046] The second loop CLb can exchange heat with the first loop CLA via a cooling-heating evaporator 430. In cooling mode, the cooling-heating evaporator 430 acts as an evaporator, allowing the second loop CLb to obtain cooling energy from the evaporator 430 to cool a predetermined space via a terminal cooler 480. In heating mode, the cooling-heating evaporator 430 acts as a condenser, allowing the second loop CLb to obtain heat from the evaporator 430 to heat a predetermined space via a terminal heater 490. In some examples, the terminal cooler 480 may be a capillary radiant cooling terminal, and the terminal heater 490 may be a floor heating coil. However, it should be understood that other suitable indoor terminals are also feasible.

[0047] The working fluid in the first loop CLa can be a suitable refrigerant, while the working fluid in the second loop CLb can be water. By switching the three-way reversing valve 465, the terminal cooler 480 and the terminal heater 490 can be selectively activated. Thus, the refrigeration-heating unit 400 is implemented as a so-called two-in-one water chiller.

[0048] According to the first embodiment, the fresh air unit 200 may be provided with: a precooling section (which may be formed by the auxiliary refrigeration-heating evaporator 440) suitable for precooling fresh air, a dehumidification section (which may be formed by the fresh air evaporator 240) suitable for low-temperature dehumidification of fresh air, and a reheating section (which may be formed by the auxiliary fresh air condenser 230) suitable for heating fresh air. Thus, the precooling section, dehumidification section, and reheating section of the fresh air unit 200 are sequentially arranged from upstream to downstream in the air supply path FP, allowing fresh air to flow sequentially through the filter 262, heat recovery unit 264, precooling section, dehumidification section, and reheating section in the air supply path FP. In the precooling section, the fresh air is precooled to prepare for deep dehumidification. In the dehumidification section, the fresh air is deeply dehumidified. In the reheating section, the fresh air, whose temperature may be too low after dehumidification, is reheated to appropriately raise its temperature to a suitable level. In this way, the fresh air is properly treated to achieve the appropriate cleanliness, humidity, and temperature before being supplied to the indoor space.

[0049] Therefore, according to the first embodiment, the auxiliary refrigeration-heating evaporator 440 of the refrigeration-heating working fluid loop CL participates in the temperature and humidity regulation of the fresh air by the fresh air device 200 (specifically, pre-cooling the fresh air to prepare for deep dehumidification), that is, a portion of the refrigeration-heating working fluid loop CL participates in the temperature and humidity regulation of the fresh air by the fresh air device 200. In this way, the fresh air device 200 and the refrigeration-heating device 400 are combined.

[0050] Furthermore, according to the first embodiment, the fresh air working fluid circuit FL and the cooling-heating working fluid circuit CL are independent of each other and are not connected. Specifically, the fresh air working fluid circuit FL and the cooling-heating working fluid circuit CL each include a fresh air compressor 210 and a cooling-heating compressor 410.

[0051] The above description indicates that the environmental optimization system 100A may include a fresh air unit 200 and a cooling-heating unit 400. However, from another perspective (installation location and component combination), the environmental optimization system 100A may include four parts: an indoor terminal, a fresh air handling unit, a combined water chiller indoor unit, and a combined water chiller outdoor unit. The indoor terminal mainly includes a terminal cooler 480 and a terminal heater 490. The fresh air handling unit mainly includes the fresh air unit body and the pre-cooling section, dehumidification section, and reheating section of the fresh air unit 200. The combined water chiller indoor unit mainly includes a cooling-heating evaporator 430. The combined water chiller outdoor unit mainly includes the fresh air compressor 210 and fresh air condenser 220 included in the fresh air working fluid circuit FL, and the cooling-heating compressor 410 and cooling-heating condenser 420 included in the cooling-heating working fluid circuit CL. It should be noted that the combined water chiller indoor unit and the combined water chiller outdoor unit can also be designed as an integrated unit.

[0052] That is, in the first embodiment, the fresh air compressor 210 and fresh air condenser 220 included in the fresh air working fluid loop FL, and the cooling-heating compressor 410 and cooling-heating condenser 420 included in the cooling-heating working fluid loop CL, can be combined in a single outdoor unit. Specifically, the fresh air condenser 220 included in the fresh air working fluid loop FL and the cooling-heating condenser 420 included in the cooling-heating working fluid loop CL are combined together in the form of a single heat exchanger. This single heat exchanger can, for example, be a dual-loop design heat exchanger with shared aluminum fins. Additionally, as... Figure 1 As shown, a single condenser fan F1 can be installed. It should be noted that, instead of a single heat exchanger combining two condensers, two separate air-cooled heat exchangers can also be used.

[0053] In addition, in the first embodiment, an upstream pipe connected to the auxiliary fresh air condenser 230 and the fresh air evaporator 240 may be provided to bypass the auxiliary fresh air condenser 230, and a throttling valve (expansion valve) 225 may be provided in the bypass pipe.

[0054] The exemplary operation of the environmental optimization system 100A is briefly described below.

[0055] The operation of the environmental optimization system 100A is described with the fresh air unit 20 in dehumidification mode and the cooling-heating unit 400 in cooling mode.

[0056] In the first loop CLa of the refrigeration-heating working fluid loop CL, the working fluid (refrigerant) flows sequentially along the following path: refrigeration-heating compressor 410, refrigeration-heating four-way reversing valve 415, refrigeration-heating condenser 420, expansion valve 425, refrigeration-heating evaporator 430, auxiliary refrigeration-heating evaporator 440, refrigeration-heating four-way reversing valve 415, refrigeration-heating receiver 450, and refrigeration-heating compressor 410. At the refrigeration-heating evaporator 430, the working fluid absorbs heat to cool the working fluid (e.g., water) in the second loop CLb. In some examples, the evaporation temperature of the refrigeration-heating evaporator 430 is controlled to be 15 degrees Celsius, correspondingly causing the water temperature in the second loop CLb to reach 18 degrees Celsius. At the auxiliary refrigeration-heating evaporator 440, for example, a small portion of the working fluid that does not evaporate at the refrigeration-heating evaporator 430 flows to the auxiliary refrigeration-heating evaporator 440 and evaporates there, thereby absorbing heat from the fresh air and pre-cooling it. The gaseous working fluid flowing out of the auxiliary refrigeration-heating evaporator 440 returns to the refrigeration-heating compressor 410 for compression via the refrigeration-heating four-way reversing valve 415 and the refrigeration-heating receiver 450.

[0057] Meanwhile, in the second loop CLb of the cooling-heating working fluid loop CL, the working fluid (water) flows sequentially along the following path: pump 460, three-way reversing valve 465, terminal cooler 480, cooling-heating evaporator 430, pump 460. The three-way reversing valve 465 is switched so that the working fluid flows only in the second loop CLb and not in the space heating loop CLe. The working fluid is cooled at the cooling-heating evaporator 430 and then releases its cooling capacity into the indoor space at the terminal cooler 480 while being heated itself.

[0058] Meanwhile, in the fresh air working fluid circuit FL, the working fluid (refrigerant) flows sequentially along the following path: fresh air compressor 210, fresh air four-way reversing valve 215, fresh air condenser 220, auxiliary fresh air condenser 230, one-way valve 233, throttling valve (expansion valve) 235, fresh air evaporator 240, fresh air four-way reversing valve 215, fresh air receiver 250, and fresh air compressor 210. At the fresh air condenser 220, the gaseous working fluid releases heat and is condensed. At the auxiliary fresh air condenser 230, for example, by control, a small portion of the working fluid that has not condensed at the fresh air condenser 220 flows to the auxiliary fresh air condenser 230 and condenses there, thereby releasing heat to reheat the dehumidified fresh air, which may be too cold. At the fresh air evaporator 240, the liquid low-temperature working fluid evaporates and absorbs heat to cool and deeply dehumidify the fresh air. The gaseous working fluid flowing out of the fresh air evaporator 240 returns to the fresh air compressor 210 for compression via the fresh air four-way reversing valve 215 and the fresh air liquid receiver 250.

[0059] In addition, in the fresh air working fluid circuit FL, the degree of reheating of fresh air by the auxiliary fresh air condenser 230 (reheat section) can be appropriately adjusted by regulating the opening or closing of the throttle valve 225. For example, when the throttle valve 225 is closed, the auxiliary fresh air condenser 230 no longer performs the function of reheating because the working fluid no longer flows through it.

[0060] Thus, in the fresh air unit 200, fresh air from the outside at, for example, 35 degrees Celsius (or mixed with a portion of cooler return air), flows sequentially through the supply air passage FP through the filter 262, heat recovery unit 264, pre-cooling section, dehumidification section, and reheat section. Therefore, before entering the indoor space, the fresh air is conditioned to have suitable temperature, humidity, and cleanliness, thereby thoroughly and appropriately dehumidifying the indoor space. Therefore, the dehumidification of the indoor space does not depend on, for example, the terminal cooler 480.

[0061] According to a first embodiment of the present invention, a dual-refrigerant-loop cold source (i.e., a fresh air working fluid loop and a cooling-heating working fluid loop) is employed, and these two loops are not completely independent but are interconnected. For example, a portion of the cooling-heating working fluid loop participates in the temperature and humidity regulation of the fresh air by the fresh air unit. Therefore, efficient and deep dehumidification of the fresh air is achieved, and dehumidification of the indoor space can be achieved solely through the dehumidification of the fresh air, thereby realizing the concept of independent temperature and humidity control. In addition, the coordinated and auxiliary control of temperature and humidity by the two loops can also reduce overall energy consumption and equipment costs.

[0062] Furthermore, according to the first embodiment of the present invention, the fresh air working fluid circuit and the cooling-heating working fluid circuit are independent of each other and are not interconnected, and each of the fresh air working fluid circuit and the cooling-heating working fluid circuit has its own compressor. Therefore, compared with related technical solutions where the two circuits are interconnected (e.g., sharing a single compressor), the operating state and parameters of each circuit can be adjusted independently according to actual needs, such as independently and effectively adjusting the working fluid pressure of each circuit. This ensures that the environmental optimization system can appropriately control the temperature and humidity of the indoor space according to actual needs.

[0063] The following reference Figure 2 Describing an environmental optimization system 100B according to a second exemplary embodiment of the present invention ( Figure 2 An environmental optimization system according to a second exemplary embodiment of the present invention is shown. The environmental optimization system 100B is substantially the same as the environmental optimization system 100A, and the similarities will not be described again.

[0064] The main difference between environmental optimization system 100B and environmental optimization system 100A lies in the pre-cooling section of the fresh air unit 200. In the second embodiment, the cooling-heating working fluid circuit CL includes a fresh air pre-cooling circuit CLd. The fresh air pre-cooling circuit CLd can be drawn out in parallel with the second circuit CLb and thus connected in parallel with the second circuit CLb. The fresh air pre-cooling circuit CLd may include a fresh air pre-cooler 470 used as a pre-cooling section. The fresh air pre-cooler 470 is arranged in the air supply passage FP. A regulating valve 467 may also be provided in the fresh air pre-cooling circuit CLd.

[0065] The environmental optimization system 100B according to the second embodiment can achieve essentially the same technical effects as the environmental optimization system 100A according to the first embodiment. Furthermore, by using a fresh air pre-cooling circuit derived from the second circuit with water as the working fluid as the pre-cooling section, the configuration of the refrigerant circuit (first circuit) can be simplified, thereby improving the reliability of system operation.

[0066] The following reference Figure 3 Describing an environmental optimization system 100C according to a third exemplary embodiment of the present invention ( Figure 3 An environmental optimization system according to a third exemplary embodiment of the present invention is shown. The environmental optimization system 100C is substantially the same as the environmental optimization systems 100A and 100B (especially the environmental optimization system 100B), and the similarities will not be described again.

[0067] The main difference between the environmental optimization system 100C and the environmental optimization system 100B is that the fresh air working fluid circuit FL, which includes the fresh air compressor 210, fresh air condenser 220, auxiliary fresh air condenser 230, and fresh air evaporator 240, is integrally arranged within the fresh air unit body. Specifically, the auxiliary fresh air condenser 230 and the fresh air evaporator 240 can be arranged in the supply air passage FP, while the fresh air compressor 210 and the fresh air condenser 220 can be arranged in the exhaust air passage BP.

[0068] Furthermore, in the environmental optimization system 100C, the cooling-heating working fluid circuit CL includes a third circuit CLc. The third circuit CLc can be drawn out in parallel from the fresh air pre-cooling circuit CLd, thus being connected in parallel with the fresh air pre-cooling circuit CLd and, in effect, also in parallel with the second circuit CLb.

[0069] The environmental optimization system 100C according to the third embodiment achieves essentially the same technical effects as the environmental optimization system 100B according to the second embodiment. Furthermore, by using water for both pre-cooling and heat exchange at the fresh air condenser, the cooling condition of the fresh air condenser in the fresh air working fluid loop is improved, thereby improving the circulation conditions of the fresh air working fluid loop. Additionally, the environmental optimization system 100C simplifies the structure of the combined water chiller outdoor unit and makes the piping of the fresh air working fluid loop simpler and more reliable.

[0070] The following reference Figure 4 Describing an environmental optimization system 100D according to a fourth exemplary embodiment of the present invention ( Figure 4 An environmental optimization system according to a fourth exemplary embodiment of the present invention is shown. The environmental optimization system 100D is substantially the same as the environmental optimization systems 100A, 100B, and 100C (especially the environmental optimization system 100B), and the similarities will not be described again here.

[0071] The main difference between the environmental optimization system 100D and the environmental optimization system 100B is that the fresh air working fluid circuit FL and the cooling-heating working fluid circuit CL share a single compressor 310 and are interconnected. The compression mechanism of this single compressor 310 is provided with a first intake port (not shown) for the fresh air working fluid circuit FL and a second intake port (not shown) for the cooling-heating working fluid circuit CL. The working fluid discharged from the compressor 310 can enter a shared condenser 320 (or enter individual condensers combined together). The working fluid discharged from the condenser 320 is divided into two paths. One path enters the auxiliary fresh air condenser 230, etc., and finally returns to the compressor 310 after passing through the fresh air receiver 250, thus forming the fresh air working fluid circuit FL. The other path enters the cooling-heating evaporator 430, etc., and finally returns to the compressor 310 after passing through the cooling-heating receiver 450, thus forming the first circuit CLa of the cooling-heating working fluid circuit CL. The return working fluid of the fresh air working fluid circuit FL and the return fluid of the first circuit CLa enter the interior of the compressor 310 through different intake pipes on the housing of the compressor 310. They then enter the compressor mechanism via different first and second intake ports within the compressor 310, where they can mix. For example, the compressor 310 may be a single-turn scroll compressor with a single compressor mechanism (scroll assembly) and a single compression unit (single set of compression chambers). In this case, the first and second intake ports may be different intake ports on the compressor mechanism communicating with different pressure chambers. For example, the first intake port may be a low-pressure intake port, and the second intake port may be a medium-pressure intake port (the medium-pressure intake port may be provided, for example, by an EVI port).

[0072] The environmental optimization system 100D according to the fourth embodiment can achieve substantially the same technical effects as the environmental optimization system 100B according to the second embodiment. Furthermore, the use of a single compressor simplifies the system structure. Although a single compressor is used and the two circuits are interconnected, the presence of two suction ports allows the circuit with lower pressure return working fluid to be connected to the low-pressure suction port, and the circuit with higher pressure return working fluid to be connected to the medium-pressure suction port. This allows for different working fluid pressures in the two circuits, satisfying the different actual requirements of each circuit for its operating state and parameters. Additionally, the use of different suction ports avoids the situation where the higher-pressure working fluid is forced to depressurize first, resulting in additional power consumption, which occurs when using a single suction port.

[0073] This invention allows for various feasible variations.

[0074] The preceding text describes a portion of the cooling-heating working fluid loop CL participating in the temperature and humidity regulation of fresh air by the fresh air unit 200. However, other combined approaches are conceivable and can be employed, such as having a portion of the fresh air working fluid loop FL participate in the cooling and / or heating of a predetermined space by the cooling-heating unit 400. In this case, for example, a loop can be drawn in parallel from the fresh air working fluid loop FL and directed to the heat exchanger corresponding to the cooling-heating evaporator 430.

[0075] The foregoing described a method in which the two circuits are independent and unconnected: the fresh air working fluid circuit FL and the cooling-heating working fluid circuit CL each include a fresh air compressor 210 and a cooling-heating compressor 410, respectively. However, it is conceivable that other suitable methods can be used to achieve the independence of the two circuits. For example, the fresh air working fluid circuit and the cooling-heating working fluid circuit share a single compressor, and this single compressor includes two independent and unconnected compression mechanisms for the fresh air working fluid circuit and the cooling-heating working fluid circuit, respectively. An example of such a compressor could be a twin-cylinder rotary compressor comprising two independent compression mechanisms (each consisting of its own cylinder and rotor). Another example is a single compression mechanism of a single compressor shared by the fresh air working fluid circuit and the cooling-heating working fluid circuit, and this single compression mechanism includes two independent and unconnected compression units for the fresh air working fluid circuit and the cooling-heating working fluid circuit, respectively. For this situation, an example of a compressor could be a dual-scroll compressor comprising two independent compression units (two sets of compression chambers, each set consisting of a fixed-moving scroll located at a single compression mechanism).

[0076] The above description indicates that the fresh air unit 200 includes a pre-cooling section, a dehumidification section, and a reheating section. However, it is conceivable that the heat exchange section used for temperature and humidity regulation of the fresh air in the fresh air unit 200 can be appropriately varied. For example, the pre-cooling section and / or the reheating section can be omitted. Alternatively, two pre-cooling sections can be provided simultaneously, such as a secondary cooling-heating evaporator 440 and a fresh air pre-cooler 470, which is advantageous in situations where increased fresh air pre-cooling is required to improve dehumidification, depending on the actual situation.

[0077] In addition, it should be noted that, unless they are technically incompatible, the technical features of the various implementation methods and their variations described above can be arbitrarily combined with each other.

[0078] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the specific embodiments described and shown herein, and various changes can be made to the exemplary embodiments by those skilled in the art without departing from the scope defined by the claims.

Claims

1. An environmental optimization system, the environmental optimization system comprising: A fresh air unit (200) is configured to supply fresh air to a predetermined space and includes a fresh air working fluid loop (FL), the fresh air unit (200) being adapted to regulate the humidity and / or temperature of the fresh air via the fresh air working fluid loop (FL); and A refrigeration-heating device (400) includes a refrigeration-heating working fluid circuit (CL) adapted to cool and / or heat a predetermined space via the refrigeration-heating working fluid circuit (CL). The fresh air unit (200) and the cooling-heating unit (400) are combined, such that a portion of the cooling-heating working fluid circuit (CL) participates in the temperature and humidity regulation of the fresh air by the fresh air unit (200), and The fresh air working fluid circuit (FL) and the cooling-heating working fluid circuit (CL) are independent of each other and not connected to each other; alternatively, the fresh air working fluid circuit (FL) and the cooling-heating working fluid circuit (CL) share a single compressor and are connected to each other, and the compression mechanism of the single compressor is provided with a first intake port for the fresh air working fluid circuit (FL) and a second intake port for the cooling-heating working fluid circuit (CL). in: The fresh air device (200) is equipped with a pre-cooling section suitable for pre-cooling fresh air. The cooling-heating working fluid circuit (CL) includes a cooling-heating evaporator (430), a first circuit (CLa), and a second circuit (CLb). The first circuit (CLa) includes a cooling-heating compressor. The second circuit (CLb) is capable of exchanging heat with the first circuit (CLa) via the cooling-heating evaporator (430) to cool a predetermined space. The first circuit (CLa) further includes a secondary cooling-heating evaporator (440) connected in series with the cooling-heating evaporator (430) and located downstream of the cooling-heating evaporator (430), the secondary cooling-heating evaporator (440) serving as the precooling section, and / or, the cooling-heating working fluid circuit (CL) further includes a fresh air precooling circuit (CLd) connected in parallel with the second circuit (CLb), the fresh air precooling circuit (CLd) including a fresh air precooler (470) serving as the precooling section. The fresh air working fluid circuit (FL) includes a fresh air evaporator (240) and a secondary fresh air condenser (230) located upstream of the fresh air evaporator (240). An upstream pipe is provided connecting the secondary fresh air condenser (230) and the fresh air evaporator (240) to bypass the secondary fresh air condenser (230). A throttling valve (225) is provided in the bypass pipe.

2. The environmental optimization system according to claim 1, wherein, The fresh air working fluid circuit (FL) also includes a fresh air condenser located upstream of the auxiliary fresh air condenser (230). The fresh air evaporator (240) serves as a dehumidification section of the fresh air device (200) suitable for low-temperature dehumidification of fresh air, and the auxiliary fresh air condenser (230) serves as a reheat section of the fresh air device (200) suitable for heating fresh air.

3. The environmental optimization system according to claim 2, wherein, The fresh air device (200) includes a fresh air device body, and the fresh air working fluid circuit (FL) further includes a fresh air compressor. The fresh air working fluid circuit (FL), which includes the fresh air compressor, the fresh air condenser, the auxiliary fresh air condenser (230) and the fresh air evaporator (240), is integrally arranged in the fresh air device body.

4. The environmental optimization system according to claim 3, wherein, The fresh air device (200) includes a supply air passage (FP) and an exhaust air passage (BP) disposed in the body of the fresh air device. The auxiliary fresh air condenser (230) and the fresh air evaporator (240) are arranged in the supply air passage (FP), and the fresh air compressor and the fresh air condenser are arranged in the exhaust air passage (BP).

5. The environmental optimization system according to claim 3, wherein, The cooling-heating working fluid circuit (CL) also includes a third circuit (CLc) connected in parallel with the second circuit (CLb), the third circuit (CLc) being guided to the fresh air condenser arranged in the fresh air unit body for heat exchange at the fresh air condenser.

6. The environmental optimization system according to claim 1, wherein, The working fluid in the second circuit (CLb) is water, and the second circuit (CLb) includes an end cooler (480) suitable for cooling a predetermined space. The cooling-heating working fluid circuit (CL) also includes a space heating circuit (CLe) connected in parallel with the second circuit (CLb), and the space heating circuit (CLe) includes an end heater (490) suitable for heating a predetermined space.

7. The environmental optimization system according to claim 1 or 2, wherein, When the fresh air working fluid circuit (FL) and the cooling-heating working fluid circuit (CL) are independent of each other and not connected, the fresh air working fluid circuit (FL) and the cooling-heating working fluid circuit (CL) respectively include a fresh air compressor and a cooling-heating compressor; They share a single compressor, which includes two independent and unconnected compression mechanisms for the fresh air working fluid circuit (FL) and the cooling-heating working fluid circuit (CL), respectively. Alternatively, a single compressor unit may be used, comprising two independent and unconnected compression units for the fresh air working fluid circuit (FL) and the cooling-heating working fluid circuit (CL), respectively.

8. The environmental optimization system according to claim 1 or 2, wherein, The fresh air compressor and fresh air condenser included in the fresh air working fluid circuit (FL) and the refrigeration-heating compressor and refrigeration-heating condenser (420) included in the refrigeration-heating working fluid circuit (CL) are combined in a single outdoor unit.

9. The environmental optimization system according to claim 8, wherein, The fresh air condenser included in the fresh air working fluid loop (FL) and the refrigeration-heating condenser (420) included in the refrigeration-heating working fluid loop (CL) are combined together as a single heat exchanger.

10. The environmental optimization system according to claim 1 or 2, wherein, An air supply passage (FP) is provided in the body of the fresh air device (200), and a pre-cooling section, a dehumidification section and a reheating section of the fresh air device (200) are arranged sequentially from upstream to downstream in the air supply passage (FP).

11. The environmental optimization system according to claim 10, wherein, The fresh air unit (200) is also provided with an exhaust air passage (BP) in its body, and the fresh air unit (200) is also provided with a filter (262) arranged in the supply air passage (FP) and a heat recovery unit (264) extending from the supply air passage (FP) to the exhaust air passage (BP), so that fresh air can flow sequentially through the filter (262), the heat recovery unit (264), the precooling section, the dehumidification section and the reheat section in the supply air passage (FP).

12. The environmental optimization system according to claim 1, wherein, The fresh air unit (200) is combined with the cooling-heating unit (400) and a portion of the fresh air working fluid circuit (FL) participates in the cooling and / or heating of the predetermined space by the cooling-heating unit (400).

Images