Water-cooled deep dehumidification unit and water-cooled dehumidification and fresh air preheating integrated unit

Abstract

The utility model discloses a water-cooled deep dehumidification unit and a water-cooled dehumidification and fresh air preheating integrated unit, and belongs to the technical field of dehumidification and preheating of air conditioners. Comprising a pre-surface cooling coil connected with a fresh air filtering part; the evaporator is connected with the pre-surface cooling coil pipe; the gas-liquid separator is connected with the output end of the evaporator; the compressor is connected with the gas-liquid separator; the second refrigerant inlet and outlet is connected with the output end of the compressor; the first filter is connected with the first refrigerant inlet and outlet of the heat exchanger to form filtered first refrigerant liquid; the first expansion valve is connected between the first filter and the input end of the evaporator, and second refrigerant liquid is formed for cyclic dehumidification. The technical scheme has the beneficial effects that an air-cooled condenser is replaced by the water-cooled condenser, and an air-cooled outdoor unit is omitted, so that the material cost and the mounting cost are reduced; the condenser is adopted to replace an electric heater, equipment energy consumption is reduced, dehumidification equipment and preheating equipment are integrated, and installation space and workload are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of air - conditioning dehumidification and pre - heating, in particular to a water - cooled deep dehumidification unit and a water - cooled dehumidification and fresh - air pre - heating integrated unit. Background Technique

[0002] At present, the main functions of the fresh - air unit in a clean space are to deeply dehumidify the fresh air in summer and heat and humidify the fresh air in winter, so that the clean space remains in a constant temperature and humidity state throughout the year. At the same time, considering the anti - freezing requirements in winter, it is also necessary to pre - heat the fresh air. The deep dehumidification technology mainly adopts air - cooled evaporation condensation dehumidification and requires an independent outdoor unit. The pre - heating of the fresh air is carried out by electric heating. The two systems are used separately in summer and winter, and one of the systems will be in a non - working state. For such a configuration, the initial investment cost is relatively large, and the energy consumption of electric heating is relatively high. Content of the Utility Model

[0003] The purpose of the utility model is to provide a water - cooled deep dehumidification unit to solve the above - mentioned technical problems;

[0004] The purpose of the utility model is also to provide a water - cooled dehumidification and fresh - air pre - heating integrated unit to solve the above - mentioned technical problems;

[0005] A water - cooled deep dehumidification unit includes:

[0006] A pre - surface cooling coil, connected to the fresh - air filtering part;

[0007] An evaporator, connected to the pre - surface cooling coil;

[0008] A gas - liquid separator, connected to the output end of the evaporator;

[0009] A compressor, connected to the gas - liquid separator;

[0010] A heat exchanger, the second refrigerant inlet and outlet of the heat exchanger are connected to the output end of the compressor;

[0011] A first filter, connected to the first refrigerant inlet and outlet of the heat exchanger;

[0012] The first expansion valve is connected between the first filter and the input end of the evaporator.

[0013] Preferably, it further includes:

[0014] A first check valve, arranged on the pipeline between the output end of the evaporator and the gas - liquid separator;

[0015] A first solenoid valve, arranged on the pipeline between the compressor and the second refrigerant inlet and outlet of the heat exchanger;

[0016] A second check valve is provided between the first solenoid valve and the second refrigerant inlet and outlet.

[0017] A third check valve is provided between the first refrigerant inlet and outlet of the heat exchanger and the first filter.

[0018] A second solenoid valve is provided between the first filter and the first expansion valve.

[0019] Preferably, the pre-cooling coil performs the first cooling and dehumidification treatment on the filtered fresh air to form the first cold air, the evaporator performs the second cooling and dehumidification treatment on the first cold air to form the second cold air, the temperature of the second cold air is calculated according to the indoor humidity, and the temperature of the second cold air is less than 10°C.

[0020] Preferably, the fresh air filtering section includes

[0021] Primary and intermediate efficiency filters;

[0022] A fan is connected to the output ends of the primary and intermediate efficiency filters;

[0023] A sub-high efficiency filter is connected to the output end of the fan to perform secondary deep filtration on the drawn fresh air.

[0024] A water-cooled dehumidification and fresh air preheating integrated unit includes the water-cooled deep dehumidification unit, including

[0025] A condenser, the input end of the condenser is connected to the output end of the compressor;

[0026] A second filter is connected to the output end of the condenser;

[0027] A second expansion valve is connected between the second filter and the first refrigerant inlet and outlet of the heat exchanger;

[0028] The second refrigerant inlet and outlet of the heat exchanger is connected to the input end of the gas-liquid separator;

[0029] The gas-liquid separator is connected to the second refrigerant inlet and outlet of the heat exchanger;

[0030] The compressor is connected between the gas-liquid separator and the input end of the condenser.

[0031] Preferably, it further includes

[0032] A third solenoid valve is provided on the pipeline between the output end of the compressor and the input end of the condenser;

[0033] A fourth check valve is provided between the third solenoid valve and the input end of the condenser;

[0034] The fifth check valve is arranged on the pipeline between the second expansion valve and the first refrigerant inlet / outlet of the heat exchanger;

[0035] The sixth check valve is arranged on the pipeline between the second refrigerant inlet / outlet of the heat exchanger and the gas-liquid separator;

[0036] The fourth solenoid valve is arranged on the pipeline between the sixth check valve and the gas-liquid separator.

[0037] Preferably, it further includes

[0038] the fresh air filtration part;

[0039] the condenser, which is connected to the fresh air filtration part;

[0040] the pre-cooling coil, which is connected to the fresh air filtration part;

[0041] the evaporator, which is connected to the pre-cooling coil;

[0042] The hot water heating coil is connected to the condenser and the evaporator.

[0043] Preferably, it further includes a fresh air inlet located at the front end of the fresh air filtration part and an air outlet located at the rear end of the hot water heating coil, and the air temperature after being processed by the pre-cooling coil is 12°C to 14°C.

[0044] Preferably, it further includes a controller connected to the evaporator and the condenser, which is used to automatically select the operating mode according to the change of the outdoor air temperature.

[0045] Preferably, the heat exchanger is also provided with a chilled water inlet and a chilled water outlet, the water temperature at the chilled water inlet is 5°C to 9°C, and the water temperature at the chilled water outlet is 10°C to 14°C.

[0046] The beneficial effects of the present utility model are as follows: The water-cooled deep dehumidification unit uses a water-cooled condenser to replace the air-cooled condenser, cancels the air-cooled outdoor unit, improves the condensation efficiency and stability at the same time, and reduces the material cost and installation cost; The integrated unit uses a condenser to replace the electric heater, reduces the equipment energy consumption, integrates the dehumidification equipment and the preheating equipment, and saves the installation space and workload. Description of the Drawings

[0047] Figure 1 is a schematic diagram of an air-cooled deep dehumidification unit in the prior art;

[0048] Figure 2 is a schematic diagram of the water-cooled deep dehumidification unit of the present utility model;

[0049] Figure 3It is the system diagram of the water-cooled deep dehumidification unit of the present utility model;

[0050] Figure 4 It is the schematic diagram of the integrated unit of water-cooled dehumidification and fresh air preheating of the present utility model;

[0051] Figure 5 It is the overall system diagram of the integrated unit of water-cooled dehumidification and fresh air preheating of the present utility model;

[0052] Figure 6 It is the refrigeration and dehumidification system diagram of the integrated unit of water-cooled dehumidification and fresh air preheating of the present utility model;

[0053] Figure 7 It is the heating system diagram of the integrated unit of water-cooled dehumidification and fresh air preheating of the present utility model.

[0054] In the attached drawings: 1. Evaporator; 2. Gas-liquid separator; 3. Compressor; 4. Heat exchanger; 5. First filter; 6. First expansion valve; 7. First check valve; 8. First solenoid valve; 9. Second check valve; 10. Third check valve; 11. Second solenoid valve; 12. Fresh air filtration section; 121. Primary and medium efficiency filters; 122. Fan; 123. Sub-high efficiency filter; 13. Condenser; 14. Second filter; 15. Second expansion valve; 16. Third solenoid valve; 17. Fourth check valve; 18. Fifth check valve; 19. Fourth solenoid valve; 20. Pre-cooling coil; 21. Hot water heating coil; 22. Fresh air inlet; 23. Air outlet; 24. Outdoor unit; 25. Sixth check valve; 26. Evaporative coil. Specific embodiments

[0055] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0056] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0057] Next, the present utility model will be further described in conjunction with the accompanying drawings and specific embodiments, but it is not a limitation of the present utility model.

[0058] A water-cooled deep dehumidification unit, as Figure 2 、 Figure 3 shown, includes,

[0059] The pre-cooling coil 20 is connected to the fresh air filtering part 12 and is used for performing the first cooling and dehumidifying treatment on the filtered fresh air to form the first cold air;

[0060] The evaporator 1 is connected to the pre-cooling coil 20 and is used for performing the second cooling and dehumidifying treatment on the first cold air to form the second cold air. The evaporator 1 is also connected to the output end of the first expansion valve 6 and is used for heating the heat of the second refrigerant liquid output by the first expansion valve 6 to form the first refrigerant gas;

[0061] The gas-liquid separator 2 is connected to the output end of the evaporator 1 and is used for separating the liquid refrigerant in the first refrigerant gas to obtain the second refrigerant gas;

[0062] The compressor 3 is connected to the gas-liquid separator 2 and is used for compressing the second refrigerant gas to form the third refrigerant gas;

[0063] The heat exchanger 4, the second refrigerant inlet and outlet b of the heat exchanger 4 is connected to the output end of the compressor 3 and is used for releasing the heat of the third refrigerant gas to form the first refrigerant liquid;

[0064] The first filter 5 is connected to the first refrigerant inlet and outlet a of the heat exchanger 4 and filters the first refrigerant liquid to form the filtered first refrigerant liquid;

[0065] The first expansion valve 6 is connected between the first filter 5 and the input end of the evaporator 1 and is used for controlling the flow rate and pressure of the filtered first refrigerant liquid to form the second refrigerant liquid for circulating dehumidification.

[0066] In the prior art, the clean space has higher and higher requirements for the low humidity of air, and the relative humidity is generally required to be lower than 50%. The traditional air conditioning system uses chilled water for dehumidification. In theory, the humidity requirements of the specification can be met, but in fact, often due to the too high water temperature at the end of the chilled water system, the relative humidity in the clean space is greater than 70%. As Figure 1 shown, the current main method adopted by the purification air conditioning system is to add a direct evaporation coil after the chilled water coil to perform deep dehumidification on the fresh air. The cooling system uses an air-cooled type, and it is necessary to configure an outdoor unit 24. The indoor unit evaporation coil 26 and the outdoor unit 24 are connected by copper pipes. The outdoor unit 24 needs to be independently laid with power supply, which not only occupies a large space, but also the installation work is cumbersome. Especially, the outdoor units are basically concentrated on the roof, and the heat dissipation conditions are relatively poor. It is particularly affected by the outdoor ambient temperature. Especially in the high-temperature season in summer, the refrigeration efficiency of the equipment is reduced very significantly.

[0067] Specifically, the present invention provides a water-cooled deep dehumidification unit. The dehumidification equipment is integrated and completely installed inside the air conditioning unit, and there is no need to configure an air-cooled outdoor unit, which not only saves space, but also reduces the installation workload and reduces the investment cost.

[0068] Further specifically, in accordance with Figure 3 the direction of the black arrow in

[0069] flows out of the evaporator 1 as a low-temperature and low-pressure gas, which is compressed by the gas-liquid separator 2 and the compressor 3 to become a high-temperature and high-pressure gas, condensed by the heat exchanger 4 to become a medium-temperature and high-pressure liquid, and then throttled by the first filter 5 and the first expansion valve 6 to become a low-temperature and low-pressure liquid, and becomes a low-temperature and low-pressure gas by passing through the evaporator 1 (absorbing the heat of the air), and circulates in this way. Figure 5 , further includes

[0070] The first check valve 7 is arranged on the pipeline between the output end of the evaporator 1 and the gas-liquid separator 2;

[0071] The first solenoid valve 8 is arranged on the pipeline between the compressor 3 and the second refrigerant inlet / outlet b of the heat exchanger 4;

[0072] The second check valve 9 is arranged between the first solenoid valve 8 and the second refrigerant inlet / outlet b;

[0073] The third check valve 10 is arranged between the first refrigerant inlet / outlet a of the heat exchanger 4 and the first filter 5;

[0074] The second solenoid valve 11 is arranged between the first filter 5 and the first expansion valve 6.

[0075] Specifically, the first check valve 7 can prevent the refrigerant from returning from the heat exchanger 4 to the evaporator 1 during winter heating, ensure the correct flow direction of the refrigerant in the system, and avoid unnecessary problems during system operation, such as pressure fluctuations or temperature instability. The first solenoid valve 8 is used to control the flow of the refrigerant gas and effectively manage the operation of the heating cycle. The second check valve 9 is mainly used to prevent the refrigerant from flowing backward when the system is closed or the compressor stops, ensuring the stability and safety of the system. The third check valve 10 is used to prevent the refrigerant from flowing backward during the cooling process, avoid equipment damage or abnormal operation caused by backward flow, and ensure the correct flow direction of the refrigerant. The second solenoid valve 11 controls the flow direction and flow rate of the refrigerant, and is usually used to adjust the pressure and temperature in the refrigeration system, ensure the normal operation of the system and improve energy efficiency.

[0076] In a preferred embodiment, the temperature of the second cold air is calculated according to the indoor humidity, and the temperature of the second cold air is less than 10°C.

[0077] Specifically, the lower air temperature can more efficiently remove the water content in the air, ensuring that the indoor relative humidity in the clean space is stably controlled within the allowable range of the specification. By effectively controlling the temperature of the refrigerant, the air conditioning system can operate more efficiently. This not only helps to reduce energy consumption and save energy, but also is beneficial to extending the service life of the equipment.

[0078] In a preferred embodiment, with reference toFigure 4 , the fresh air filter section 12 includes

[0079] primary and intermediate filters 121 for removing pollutants in the external fresh air;

[0080] a blower 122 connected to the output end of the primary and intermediate filters 121 for sucking in the preliminarily filtered fresh air;

[0081] a sub-high efficiency filter 123 connected to the output end of the blower 122 for performing secondary deep filtration on the sucked-in fresh air.

[0082] Specifically, the pollutants include dust and solid impurities, etc. The functions of the primary and intermediate filters 121 and the sub-high efficiency filter 123 are to gradually remove pollutants such as dust and solid impurities of different sizes in the external fresh air. The primary filter can effectively filter and remove dust particles ≥ 5μm, such as dust and pollen, etc. The intermediate filter further removes dust particles ≥ 1.0μm, while the sub-high efficiency filter 123 can filter dust particles ≥ 0.5μm and bacteria, etc. Through the layer-by-layer filtration of these filters, the suspended particles in the air are greatly reduced, improving the cleanliness level and quality of the indoor air.

[0083] Further specifically, the setting of the filtration section effectively prevents dust, solid impurities, and fine dust particles from entering the clean air conditioning system and the indoor air of the clean space. It not only helps to protect the air conditioning equipment from the damage of dust particles, extends its service life, meets the environmental requirements of different grades of clean spaces, but also ensures the needs of production and manufacturing, and can provide a healthier indoor environment, reducing the transmission risk of allergens and pathogenic microorganisms in the indoor air, which is beneficial to maintaining the health of the staff.

[0084] Even more specifically, the filtration section completely reduces the quantity of dust, solid impurities, and fine dust particles entering the air conditioning system, reducing the wear of the air conditioning equipment during operation. It also reduces the energy consumption of the air conditioning system, improves the energy efficiency performance of the system, thereby saving energy and reducing energy costs.

[0085] A water-cooled dehumidification and fresh air preheating integrated unit, referring to Figure 4 , Figure 5 , includes a water-cooled deep dehumidification unit, including

[0086] a condenser 13, the input end of the condenser 13 is connected to the output end of the compressor 3, for absorbing the heat of the fourth refrigerant gas output by the compressor 3 to form a third refrigerant liquid;

[0087] a second filter 14, connected to the output end of the condenser 13;

[0088] The second expansion valve 15 is connected between the second filter 14 and the first refrigerant inlet / outlet a of the heat exchanger 4, and is used to control the flow rate and pressure of the filtered third refrigerant liquid to form a fourth refrigerant liquid;

[0089] The second refrigerant inlet / outlet b of the heat exchanger 4 is connected to the input end of the gas-liquid separator 2, and is used to heat the fourth refrigerant liquid to form a fifth refrigerant gas;

[0090] The gas-liquid separator 2 is connected to the second refrigerant inlet / outlet b of the heat exchanger 4, and is used to separate the liquid refrigerant in the fifth refrigerant gas to obtain a sixth refrigerant gas;

[0091] The compressor 3 is connected between the gas-liquid separator 2 and the input end of the condenser 13, and is used to receive the sixth refrigerant gas and compress it to form a fourth refrigerant gas for cycle heating.

[0092] Specifically, since the clean space can provide stable chilled water (supply water temperature 7°C, return water temperature 12°C) throughout the year, the chilled water is used as the cooling medium of the dehumidifier in summer and as the heat source of the condenser in winter. Compared with a water-cooled deep dehumidification unit, the system only adds a set of condenser 13 and accessories, completely replaces the electric heater, reduces the equipment energy consumption, and saves the operation and maintenance cost.

[0093] In a preferred embodiment, it further includes

[0094] The third solenoid valve 16 is arranged on the pipeline between the output end of the compressor 3 and the input end of the condenser 13;

[0095] The fourth check valve 17 is arranged between the third solenoid valve 16 and the input end of the condenser 13;

[0096] The fifth check valve 18 is arranged on the pipeline between the second expansion valve 15 and the first refrigerant inlet / outlet a of the heat exchanger 4;

[0097] The sixth check valve 25 is arranged on the pipeline between the second refrigerant inlet / outlet b of the heat exchanger 4 and the gas-liquid separator 2;

[0098] The fourth solenoid valve 19 is arranged on the pipeline between the sixth check valve 25 and the gas-liquid separator 2.

[0099] Specifically, the function of the third solenoid valve 16 is to control the flow direction of the refrigerant gas output by the compressor 3, ensuring that the refrigerant smoothly flows from the compressor 3 to the condenser 13, thereby enabling the condenser 13 to effectively dissipate heat and cool the refrigerant. The fourth check valve 17 can prevent the refrigerant from flowing backward when the system is shut down or stopped, ensuring that the refrigerant flows from the third solenoid valve 16 to the condenser 13 when needed, and avoiding out-of-control system pressure and reduced cooling efficiency. The fifth check valve 18 is used to prevent the refrigerant from flowing backward during the summer refrigeration cycle operation of the system, ensuring the normal flow of the refrigerant between the second expansion valve 15 and the heat exchanger 4, and maintaining the stability and performance of the system. The sixth check valve 25 can ensure the flow of the refrigerant between the gas-liquid separator 2 and the heat exchanger 4, ensuring the normal and smooth flow of the refrigerant during system operation, and avoiding the risk of abnormal system operation or equipment damage. The fourth solenoid valve 19 controls the flow of the refrigerant in the system, ensuring the normal flow of the refrigerant and regulating or controlling the flow rate and pressure of the refrigerant to optimize the efficiency and performance of the refrigeration cycle.

[0100] In a preferred embodiment, it further includes

[0101] A fresh air filtering unit 12 for receiving external fresh air and filtering it;

[0102] A condenser 13 connected to the fresh air filtering unit 12 for heating the filtered fresh air in winter to form first hot air;

[0103] A pre-cooling coil 20 connected to the fresh air filtering unit 12 for cooling and dehumidifying the filtered fresh air for the first time to form first cold air;

[0104] An evaporator 1 connected to the pre-cooling coil 20 for cooling and dehumidifying the first cold air for the second time to form second cold air;

[0105] A hot water heating coil 21 connected to the condenser 13 for heating the first hot air to the supply air state temperature in winter and sending the second hot gas into the room;

[0106] The hot water heating coil 21 is connected to the evaporator 1 for heating the second cold air to the supply air state temperature in summer and sending the third hot air into the room.

[0107] Specifically, the condenser 13 is connected after the fresh air filtering unit 12 and is mainly used for processing the filtered fresh air in winter. The filtered fresh air is heated to 2°C - 5°C to ensure that the pre-cooling coil 20 is not at risk of freezing and cracking inside the coil due to extremely low outdoor air temperature, heating the air temperature, and effectively reducing the heating amount of the hot water heating coil 21.

[0108] More specifically, the pre-cooling coil 20 is connected after the fresh air filtering section 12 and is used to process the filtered fresh air in summer. It can effectively reduce the temperature and humidity of the fresh air, ensure that the temperature of the first cold air after processing is between 12°C and 14°C, and significantly reduce the dehumidification capacity of the evaporator 1.

[0109] Even more specifically, the evaporator 1 is connected after the pre-cooling coil 20 and is used to further cool and dehumidify the first cold air. The first cold air after processing is deeply dehumidified to form the second cold air, that is, the air is cooled to below 10°C to ensure that the water content in the air is extremely dry. The hot water heating coil 21 is connected after the condenser 13 and the evaporator 1 and is used to heat the first hot air and the second cold air to the temperature of the supply air state respectively. It adjusts the air temperature and humidity to ensure that the air sent into the room reaches the constant temperature and humidity state required by the clean space. Whether in winter or summer, it always ensures that the temperature and humidity in the clean space are maintained in a stable state and fluctuate within the allowable range.

[0110] In a preferred embodiment, it further includes a fresh air inlet 22 located at the front end of the fresh air filtering section 12 and an air outlet 23 located at the rear end of the hot water heating coil 21. The air temperature after being processed by the pre-cooling coil 20 is between 12°C and 14°C.

[0111] Specifically, the fresh air inlet 22 is located at the front end of the fresh air filtering section 12 and is used to introduce external fresh air. The air outlet 23 is located at the rear end of the hot water heating coil 21 and is used to send the processed air into the room. It ensures that the air sent into the room meets the requirements of the clean space. When the clean space operates continuously for 24 hours throughout the year, it ensures that the temperature and humidity in the clean space are always in a stable state and fluctuate within the allowable range.

[0112] More specifically, the air temperature after being processed by the pre-cooling coil 20 is between 12°C and 14°C, indicating that the fresh air after being processed by the pre-cooling coil 20 has undergone appropriate cooling and dehumidification treatment in summer. Cooling the fresh air to between 12°C and 14°C can effectively reduce the indoor temperature and humidity, and the clean space has a preliminary stable environmental temperature and humidity guarantee.

[0113] Even more specifically, through the cooling treatment of the pre-cooling coil 20 in summer, the system can reduce the energy consumption demand in subsequent processing steps (such as the evaporator 1) and improve the energy efficiency ratio of the air conditioning system.

[0114] More specifically, when the air temperature after being processed by the summer evaporator 1 ≤ 10°C, it indicates that the fresh air after being processed by the evaporator 1 has undergone thorough deep cooling and dehumidification treatment in summer. Cooling the fresh air to 10°C or a lower temperature can ensure the absolute dryness of the air sent into the room, enabling the clean space to always maintain an environment of constant temperature and humidity control, ensuring that the temperature and humidity in the clean space meet the requirements of production and experiments without being affected, and improving the product quality and the success rate of experiments.

[0115] In a preferred embodiment, it further includes a controller connected to the evaporator 1 and the condenser 13, which is used to automatically select an operating mode according to the change of the outdoor air temperature.

[0116] Specifically, the system is not affected by the outdoor environmental temperature. The environmental conditions for dehumidification in summer and heating in winter are exactly the same. The controller only needs to automatically select an operating mode according to the outdoor air temperature. The operating modes include a summer dehumidification mode and a winter heating mode.

[0117] In a preferred embodiment, the heat exchanger 4 is also provided with a chilled water inlet c and a chilled water outlet d. The water temperature at the chilled water inlet c is 5°C - 9°C, and the water temperature at the chilled water outlet d is 10°C - 14°C.

[0118] Specifically, in summer, the temperature of the chilled water inlet c is 7°C, and the outlet temperature is 12°C, indicating that the temperature of the chilled water is relatively low when it enters the heat exchanger 4, and after passing through the heat exchanger 4, the water temperature rises to a relatively high temperature. By transferring the heat absorbed by the chilled water to other media that need to be cooled (such as air), the recycling of heat is realized. The chilled water is relatively cold before entering the heat exchanger 4 and the temperature rises after passing through the heat exchanger 4. The released heat can be used to provide warm water or heat other media, thereby improving the energy utilization efficiency.

[0119] In winter, the temperature of the chilled water inlet c is 7°C, and the outlet temperature is 4°C, indicating that the temperature of the chilled water is relatively high when it enters the heat exchanger 4, and after passing through the heat exchanger 4, the water temperature drops to a lower temperature. By transferring the cold quantity of the chilled water to other media that need to be cooled (such as air), the recycling of cold quantity is realized. The chilled water is relatively cold before entering the heat exchanger 4 and the temperature drops after passing through the heat exchanger 4. The released cold quantity can be used for systems with cold quantity requirements in winter, thereby improving the energy utilization efficiency.

[0120] Using the heat exchanger 4 for energy recovery can reduce the system's dependence on additional energy, reduce energy consumption, and save operating costs.

[0121] More specifically, by effectively utilizing the heat exchange capacity of chilled water, the system can regulate the temperature more effectively, improve the overall efficiency and performance of the air conditioning system, adapt to different environmental and seasonal requirements, provide the best cooling or heating effect in line with the actual situation, enhance the flexibility and adaptability of the system, and ensure the stability and long-term operation reliability of the system. In summer, the outdoor air with a relatively high temperature is cooled and dehumidified to 10°C or a lower temperature through the evaporator 1. The temperature of the outdoor air processed by the evaporator 1 indicates that the evaporator 1 effectively converts the cold quantity absorbed by the chilled water into the cold quantity of the air, and can provide a more effective cooling and dehumidifying effect. In winter, the outdoor air with a relatively low temperature is heated to a temperature of 2°C - 5°C through the condenser 13. The temperature of the outdoor air processed by the condenser 13 indicates that the condenser 13 effectively converts the heat absorbed from the chilled water into the heat of the air, and can provide a more effective heating effect.

[0122] In the first embodiment, referring to Figure 2 、 Figure 3 , the water-cooled deep dehumidifier includes supporting equipment such as an evaporator 1, a shell-and-tube condenser or a high-efficiency tank, a gas-liquid separator 2, a first expansion valve 6, a compressor 3, and a first filter 5.

[0123] The air treatment process is as follows:

[0124] The fresh air or mixed air is processed to 14°C through the pre-cooling water coil, then processed to below 10°C through the deep dehumidification evaporation coil (the outlet air temperature can be calculated and determined according to the indoor humidity requirements), and then heated through the hot water reheat coil to the supply air state point and sent into the room.

[0125] The refrigeration process of the evaporation coil is as follows;

[0126] Reverse Carnot cycle. After the refrigerant evaporates, its state is a low-temperature and low-pressure gas, which is compressed by the compressor 3 to become a high-temperature and high-pressure gas, condensed by the water-cooled condenser to become a medium-temperature and high-pressure liquid, throttled by the first expansion valve 6 to become a low-temperature and low-pressure liquid, and then becomes a low-temperature and low-pressure gas by absorbing the heat of the 14°C air through the evaporator 1, and this cycle continues.

[0127] Among them, the reverse Carnot cycle refers to isothermal compression: absorbing heat from the cold source and doing work at the same time, so that the system extracts heat from the low-temperature state. Adiabatic compression: the system is adiabatically compressed, and the heat absorbed from the cold source is converted into work. Isothermal expansion: releasing heat to the heat source and doing work at the same time, so that the system heats up. Adiabatic expansion: the system is adiabatically expanded, and the remaining heat is converted into work and continues to cool down. The key feature of the reverse Carnot cycle is that the direction of its heat flow is opposite to that of the Carnot cycle: absorbing heat from the low-temperature heat source and releasing heat to the high-temperature heat source.

[0128] Specifically, based on the fact that the clean space can provide stable chilled water throughout the year, and the chilled water is used as the cooling medium of the dehumidifier, the water-cooled deep dehumidification unit in the above embodiment can be unaffected by the outdoor ambient temperature, operate stably, and have a relatively large improvement in refrigeration efficiency compared to the air-cooled direct evaporation system.

[0129] More specifically, the dehumidification equipment is integrated with all system equipment and accessories, and is completely installed inside the air-conditioning unit, eliminating the need to configure an air-cooled outdoor unit. This not only saves space, reduces the installation workload, but also lowers the investment cost.

[0130] The water-cooled deep dehumidification unit of the present utility model is completely installed inside the air-conditioning unit, eliminating the need to configure an air-cooled outdoor unit. This not only saves space, but also reduces the installation workload and lowers the investment cost.

[0131] In the second embodiment, referring to Figures 4 to 7 , the water-cooled dehumidification and fresh air preheating integrated unit includes supporting equipment such as an evaporator 1, a heat exchanger 4, a condenser 13, a gas-liquid separator 2, an expansion valve, a compressor 3, a check valve, a solenoid valve, and a filter.

[0132] The summer air treatment process is as follows:

[0133] Fresh air enters the air-conditioning unit through the fresh air inlet 22. After passing through the primary and medium efficiency filters 121 and the sub-high efficiency filter 123, it is processed to 14°C by the pre-cooling coil 20, then processed to below 10°C (the outlet air temperature can be calculated and determined according to the humidity requirements in the clean environment) by the evaporator 1, and then heated to the supply air state point by the hot water heating coil 21 and sent into the room through the outlet 23.

[0134] The winter air treatment process is as follows:

[0135] Fresh air enters the air-conditioning unit through the fresh air inlet 22. After passing through the primary and medium efficiency filters 121 and the sub-high efficiency filter 123, it is processed to 5°C by the condenser 13, and then processed to the supply air state point by the hot water heating coil 21 and sent into the room through the outlet 23.

[0136] Referring to Figure 6 , the summer refrigeration and dehumidification process of the integrated unit is as follows:

[0137] During operation, Figure 5 the third solenoid valve 16 and the fourth solenoid valve 19 in Figure 6The first solenoid valve 8 and the second solenoid valve 11 in it are opened. After the refrigerant evaporates through the evaporator 1 and becomes a low-temperature and low-pressure gas, it passes through the first check valve 7 in the direction of the blue arrow, enters the gas-liquid separator 2 for treatment, and then enters the compressor 3. The gas is compressed by the compressor 3 in the direction of the red arrow and becomes a high-temperature and high-pressure gas, enters the first solenoid valve 8, and passes through the first solenoid valve 8 and the second check valve 9 in the direction of the pink arrow, and enters the heat exchanger 4 from the second refrigerant inlet and outlet b. After the refrigerant condenses, it becomes a medium-temperature and high-pressure liquid, flows out from the first refrigerant liquid inlet a, and then passes through the third check valve 10, the first filter 5, the second solenoid valve 11, and the first expansion valve 6 in the direction of the yellow arrow and is throttled to become a low-temperature and low-pressure liquid, enters the evaporator 1. The refrigerant absorbs the heat of the 14°C air through the evaporator 1 and becomes a low-temperature and low-pressure gas (dehumidifying the air), and enters the next cycle.

[0138] Refer to Figure 7 , the winter heating process of the integrated machine is as follows:

[0139] During operation, Figure 5 the first solenoid valve 8 and the second solenoid valve 11 in it are closed, the third solenoid valve 16 and the fourth solenoid valve 19 are opened. The high-temperature and high-pressure gas comes out of the compressor 3 and passes through the third solenoid valve 16 and the fourth check valve 17 in the direction of the red arrow and enters the condenser 13 (heating the air). After the refrigerant condenses, it becomes a medium-temperature and high-pressure liquid, passes through the second filter 14 and the second expansion valve 15 in the direction of the red arrow and is throttled to become a low-temperature and low-pressure liquid, passes through the fifth check valve 18 in the direction of the purple arrow, enters the heat exchanger 4 from the first refrigerant inlet and outlet a, and after evaporating through the heat exchanger 4, the state becomes a low-temperature and low-pressure gas, flows out from the second refrigerant inlet and outlet b, passes through the sixth check valve 25 and the fourth solenoid valve 19 in the direction of the purple arrow, and after being processed by the gas-liquid separator 2 in the direction of the blue arrow, enters the compressor 3, is compressed and becomes a high-temperature and high-pressure gas and comes out to enter the next cycle.

[0140] Compared with the water-cooled deep dehumidification unit, the water-cooled dehumidification and fresh air preheating integrated unit of the present invention only adds a set of condenser 13 and accessories, completely replaces the electric heater, reduces the equipment energy consumption, and saves the operation and maintenance cost.

[0141] In summary, the present application provides a water-cooled deep dehumidification unit and a water-cooled dehumidification and fresh air preheating integrated unit. The water-cooled dehumidification and fresh air preheating integrated machine uses a condenser to replace the electric heater, reduces the equipment energy consumption, integrates the dehumidification equipment and the preheating equipment, and the design of the water-cooled dehumidification unit cancels the air-cooled outdoor unit, saving the installation space and workload.

[0142] The above are only the preferred embodiments of the present utility model, and thus do not limit the implementation manners and protection scope of the present utility model. For those skilled in the art, it should be realized that all the solutions obtained by equivalent substitutions and obvious changes made by using the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water-cooled deep dehumidification unit, characterized in that: include, A pre-cooling coil (20) is connected to a fresh air filter (12); An evaporator (1) connected to the pre-cooling coil (20); A gas-liquid separator (2) connected to the output end of the evaporator (1); A compressor (3) connected to the gas-liquid separator (2); A heat exchanger (4), wherein a second refrigerant inlet and outlet (b) of the heat exchanger (4) is connected to an output end of the compressor (3); A first filter (5) connected to a first refrigerant inlet and outlet (a) of the heat exchanger (4); The first expansion valve (6) is connected between the first filter (5) and the input end of the evaporator (1).

2. The water-cooled deep dehumidification unit according to claim 1, characterized in that: Also includes, A first check valve (7) is provided on a pipeline between the output end of the evaporator (1) and the gas-liquid separator (2); a first solenoid valve (8) disposed on a pipeline between the compressor (3) and the second refrigerant inlet and outlet (b) of the heat exchanger (4); A second check valve (9) is provided between the first solenoid valve (8) and the second refrigerant inlet and outlet (b); a third check valve (10) disposed between the first refrigerant inlet and outlet (a) of the heat exchanger (4) and the first filter (5); The second solenoid valve (11) is arranged between the first filter (5) and the first expansion valve (6).

3. The water-cooled deep dehumidification unit according to claim 1, characterized in that: The pre-cooling coil (20) performs a first cooling and dehumidification process on the filtered fresh air to form a first cold air, and the evaporator (1) performs a second cooling and dehumidification process on the first cold air to form a second cold air. The temperature of the second cold air is calculated based on the indoor humidity, and the temperature of the second cold air is less than 10°C.

4. The water-cooled deep dehumidification unit according to claim 1, characterized in that: The fresh air filter unit (12) comprises: Primary and medium efficiency filters (121); A fan (122) connected to the output ends of the primary and medium efficiency filters (121); The sub-high efficiency filter (123) is connected to the output end of the fan (122) to perform secondary deep filtration on the fresh air drawn in.

5. A water-cooled dehumidification and fresh air preheating integrated unit, characterized in that: The water-cooled deep dehumidification unit according to any one of claims 1 to 4 comprises: A condenser (13), wherein an input end of the condenser (13) is connected to an output end of the compressor (3); a second filter (14), connected to the output end of the condenser (13); a second expansion valve (15) connected between the second filter (14) and the first refrigerant inlet and outlet (a) of the heat exchanger (4); The second refrigerant inlet and outlet (b) of the heat exchanger (4) is connected to the input end of the gas-liquid separator (2); The gas-liquid separator (2) is connected to the second refrigerant inlet and outlet (b) of the heat exchanger (4); The compressor (3) is connected between the gas-liquid separator (2) and the input end of the condenser (13).

6. The water-cooling dehumidification and fresh air preheating integrated unit according to claim 5, characterized in that: Also includes, a third solenoid valve (16) disposed on a pipeline between an output end of the compressor (3) and an input end of the condenser (13); a fourth check valve (17) disposed between the third solenoid valve (16) and an input end of the condenser (13); a fifth check valve (18) provided on a pipeline between the second expansion valve (15) and the first refrigerant inlet and outlet (a) of the heat exchanger (4); a sixth check valve (25) provided on the pipeline between the second refrigerant inlet and outlet (b) of the heat exchanger (4) and the gas-liquid separator (2); The fourth solenoid valve (19) is arranged on the pipeline between the sixth check valve (25) and the gas-liquid separator (2).

7. The water-cooling dehumidification and fresh air preheating integrated unit according to claim 5, characterized in that: Also includes, The fresh air filter (12); The condenser (13) is connected to the fresh air filter (12); The pre-cooling coil (20) is connected to the fresh air filter (12); The evaporator (1) is connected to the pre-cooling coil (20); The hot water heating coil (21) connects the condenser (13) and the evaporator (1).

8. The water-cooling dehumidification and fresh air preheating integrated unit according to claim 7, characterized in that: It also includes a fresh air inlet (22) located at the front end of the fresh air filter (12) and an air outlet (23) located at the rear end of the hot water heating coil (21); the temperature of the air treated by the pre-cooling coil (20) is 12°C to 14°C.

9. The water-cooling dehumidification and fresh air preheating integrated unit according to claim 5, characterized in that: It also includes a controller connected to the evaporator (1) and the condenser (13) for automatically selecting an operating mode according to changes in outdoor air temperature.

10. The water-cooling dehumidification and fresh air preheating integrated unit according to claim 5, characterized in that: The heat exchanger (4) is also provided with a chilled water inlet (c) and a chilled water outlet (d). The water temperature at the chilled water inlet (c) is 5°C to 9°C, and the water temperature at the chilled water outlet (d) is 10°C to 14°C.

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