Dehumidification device

Abstract

The invention provides a dehumidification device which comprises a first evaporator and a second evaporator, and pre-cooled air sequentially flows through the first evaporator and the second evaporator to be cooled and dehumidified. The gas-liquid separation part is used for separating out a gaseous refrigerant and a liquid refrigerant, and the gas-liquid separation part is provided with a first outlet from which the gaseous refrigerant flows out and a second outlet from which the liquid refrigerant flows out; a heat exchange runner inlet of the first evaporator communicates with the first outlet and communicates with a heat exchange runner outlet of the second evaporator, and a heat exchange runner inlet of the second evaporator communicates with the second outlet. The refrigeration dehumidification system solves the problem that in the deep dehumidification process of a refrigeration dehumidification system in the prior art, the simple structure and frostless operation cannot be achieved at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and in particular, to a dehumidification device. BACKGROUND

[0002] The common dehumidification technology forms in the air conditioning field mainly include a refrigeration dehumidification system, a solution dehumidification system and a rotary dehumidification system. When deeply dehumidifying air, the solution dehumidification system and the rotary dehumidification system can be used alone, but the solution dehumidification system has a relatively complex structure, and the rotary dehumidification system has a relatively high energy consumption. Although the refrigeration dehumidification system is simple, the outlet air temperature is usually above 8℃, otherwise the evaporator is prone to frosting. In order to realize frostless operation of the refrigeration dehumidification system, the refrigeration dehumidification system usually needs to be combined with a low-temperature antifreeze liquid, but the addition of the low-temperature antifreeze liquid circulation system makes the structure of the refrigeration dehumidification system become complex, and the operation energy efficiency is low. SUMMARY

[0003] The main purpose of the present application is to provide a dehumidification device to solve the problem that the refrigeration dehumidification system in the prior art cannot simultaneously consider simple structure and frostless operation in the deep dehumidification process.

[0004] In order to achieve the above-mentioned purpose, the present application provides a dehumidification device, comprising: a first evaporator and a second evaporator, pre-cooled air flows through the first evaporator and the second evaporator in sequence to be cooled and dehumidified; a gas-liquid separation member for separating gaseous refrigerant and liquid refrigerant, the gas-liquid separation member has a first outlet for flowing out gaseous refrigerant and a second outlet for flowing out liquid refrigerant; the heat exchange flow channel inlet of the first evaporator is in communication with the first outlet, and the heat exchange flow channel outlet of the second evaporator is in communication with the heat exchange flow channel inlet of the first evaporator, and the heat exchange flow channel inlet of the second evaporator is in communication with the second outlet.

[0005] Further, the dehumidification device further comprises a first pipeline and a pressure adjusting member, the inflow end and the outflow end of the first pipeline are in communication with the first outlet and the heat exchange flow channel inlet of the first evaporator respectively, and the pressure adjusting member is arranged on the first pipeline and is used for adjusting the real-time pressure of the gaseous refrigerant in the first pipeline.

[0006] Further, the dehumidification device further comprises a first condenser, the air flow passage inlet of the first condenser is in communication with the air flow passage outlet of the second evaporator, so that the air flowing out of the second evaporator enters the first condenser to be heated; the heat exchange flow channel outlet of the first condenser is in communication with the inlet of the gas-liquid separation member, so as to introduce the refrigerant into the gas-liquid separation member; and the heat exchange flow channel inlet of the first condenser is in communication with the heat exchange flow channel outlet of the first evaporator.

[0007] Further, the dehumidifying device further comprises a second pipeline and a third pipeline, the inflow end and the outflow end of the second pipeline are respectively connected with the heat exchange flow passage outlet of the first condenser and the inlet of the gas-liquid separation member, a first pressure reducing member is arranged on the second pipeline to reduce the pressure of the refrigerant in the second pipeline; the inflow end and the outflow end of the third pipeline are respectively connected with the heat exchange flow passage outlet of the first evaporator and the heat exchange flow passage inlet of the first condenser, a first pressure increasing member is arranged on the third pipeline to increase the pressure of the refrigerant in the third pipeline.

[0008] Further, the dehumidifying device further comprises a fourth pipeline and a fifth pipeline, the inflow end and the outflow end of the fourth pipeline are respectively connected with the second outlet and the heat exchange flow passage inlet of the second evaporator, the inflow end and the outflow end of the fifth pipeline are respectively connected with the heat exchange flow passage outlet of the second evaporator and the heat exchange flow passage inlet of the first evaporator, the outflow end of the first pipeline is connected with the fifth pipeline.

[0009] Further, the gas-liquid separation member comprises a shell, the shell surrounds a cavity for accommodating the refrigerant to be separated, the bottom of the shell is provided with a second outlet, the top of the shell is provided with a first outlet and an inlet, the first outlet, the second outlet and the inlet are all connected with the cavity; the dehumidifying device further comprises a U-shaped communication pipe, one end of the U-shaped communication pipe is connected with the top of the cavity, the other end of the U-shaped communication pipe is connected with the inflow end of the first pipeline.

[0010] Further, the dehumidifying device further comprises a pre-cooling member, the heat exchange flow passage of the pre-cooling member is used for passing in a cooling liquid, the air flow passage inlet of the pre-cooling member is used for passing in air, the air flow passage outlet of the pre-cooling member is connected with the air flow passage inlet of the first evaporator, so that the pre-cooling member pre-cools and dehumidifies the air.

[0011] Further, the dehumidifying device further comprises a third evaporator and a second condenser, the two ends of the air flow passage of the third evaporator are respectively connected with the air flow passage outlet of the first evaporator and the air flow passage inlet of the second evaporator, the air flow passage inlet of the second condenser is connected with the air flow passage outlet of the first condenser, the refrigerants in the third evaporator and the second condenser are arranged exchangeably.

[0012] Further, the dehumidifying device further comprises a sixth pipeline, the inflow end and the outflow end of the sixth pipeline are respectively connected with the heat exchange flow passage outlet of the third evaporator and the heat exchange flow passage inlet of the second condenser, a second pressure increasing member and an air-cooled heat dissipation component are arranged on the sixth pipeline in sequence, the second pressure increasing member is used for increasing the pressure of the refrigerant flowing therethrough, the air-cooled heat dissipation component is used for dissipating heat of the refrigerant in the sixth pipeline to adjust the temperature of the refrigerant flowing into the second condenser.

[0013] Further, the air-cooled heat dissipation component includes a heat dissipation fan and a finned surface air cooler, the finned surface air cooler is internally provided with a heat exchange flow channel, and is externally provided with heat dissipation fins; the heat dissipation fan is arranged on one side or both sides of the finned surface air cooler; the refrigerant in the sixth pipeline flows through the heat exchange flow channel in the finned surface air cooler into the second condenser; and the operating frequency of the heat dissipation fan is adjustably set; and / or the dehumidification device further includes a seventh pipeline, the inflow end and the outflow end of the seventh pipeline are respectively connected with the heat exchange flow channel outlet of the second condenser and the heat exchange flow channel inlet of the third evaporator, and the seventh pipeline is provided with a second pressure reducing component for reducing the pressure of the refrigerant in the seventh pipeline.

[0014] By applying the technical scheme of the present application, the dehumidification device includes a first evaporator, a second evaporator and a gas-liquid separation component, the air is pre-cooled to reduce its initial humidity, the pre-cooled air is first subjected to preliminary temperature reduction and dehumidification by the first evaporator, and then subjected to further deep dehumidification by the second evaporator; the average temperature of the refrigerant in the second evaporator is lower than that in the first evaporator, and the heat exchange efficiency of the second evaporator is higher; therefore, the first evaporator is used for dehumidification and temperature reduction of air at a higher temperature, and the second evaporator is used for dehumidification and temperature reduction of air at a lower temperature, so that the air can be continuously processed by multiple evaporators, the dehumidification efficiency of the dehumidification device is improved by the method of staged deep dehumidification, low-temperature and low-humidity air can be output, and all the evaporators in the dehumidification device are in frost-free operation. Specifically, the refrigerant at the heat exchange flow channel outlet of the second evaporator mixes with the gaseous refrigerant in the gas-liquid separation component to flow into the first evaporator, so that the refrigerant at the heat exchange flow channel inlet of the first evaporator is in a saturated state, and the refrigerant at the heat exchange flow channel outlet of the first evaporator is in a superheated state, avoiding liquid impact and damage of the first pressure increasing component due to suction of liquid refrigerant, and the air temperature at the outlet of the first evaporator is relatively high (generally not lower than 10℃), so that there is no risk of frosting; the liquid refrigerant in the gas-liquid separation component provides the cold energy required for deep dehumidification in the second evaporator, so that the refrigerant in the second evaporator is basically in a saturated state, fully ensuring the heat exchange efficiency of the second evaporator, reducing the temperature difference between the refrigerant in the second evaporator and the air flowing therethrough, and in addition, the average temperature of the refrigerant in the second evaporator is higher than 0℃, avoiding the problem of frosting caused by the surface temperature of the second evaporator being too low. Therefore, the dehumidification device of the present application solves the problem in the prior art that the refrigeration dehumidification system cannot simultaneously have a simple structure and frost-free operation in the process of deep dehumidification. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which form a part of the present application, are used to provide further understanding of the present application, and serve as an explanation of the illustrative embodiments of the present application, and do not constitute improper limitations to the present application. In the drawings:

[0016] Figure 1 A schematic view of an embodiment of the dehumidification device according to the present application is shown.

[0017] wherein the above figures include the following reference signs:

[0018] 10, first evaporator; 20, second evaporator; 30, gas-liquid separation member; 1, first pipeline; 40, pressure regulating member; 50, first condenser; 2, second pipeline; 3, third pipeline; 4, fourth pipeline; 33, housing; 60, pre-cooling member; 70, third evaporator; 80, second condenser; 5, sixth pipeline; 11, second pressure increasing member; 12, air-cooled heat dissipation member; 121, heat dissipation fan; 122, finned surface air cooler; 6, seventh pipeline; 13, second pressure reducing member; 14, first pressure increasing member; 15, first pressure reducing member; 37, U-shaped communication pipe; 7, fifth pipeline; 8, cold water; 9, cold water return. DETAILED DESCRIPTION

[0019] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments consistent with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0020] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application, unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the purpose of illustration and description only and not to limit the scope of the application. Techniques, methods, and apparatus known to those of ordinary skill can not be discussed in detail because such techniques, methods, and apparatus are considered to be part of the base art. In all examples shown and discussed herein, any specific value is to be interpreted as illustrative only and not as a limitation. Thus, other examples of example embodiments can have different values. It is noted that like reference numerals and letters refer to like items in the following drawings and, as a result, further discussion of such items is not necessary in the subsequent drawings.

[0021] In the description of the present application, it is to be understood that the orientation or positional relationship indicated by orientation words such as "front, back, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" and the like are generally based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, without the opposite indication, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of the parts themselves.

[0022] Reference is made to Figure 1 The application provides a dehumidifying device, comprising: a first evaporator 10 and a second evaporator 20, pre-cooled air flows through the first evaporator 10 and the second evaporator 20 in sequence to be cooled and dehumidified; a gas-liquid separation member 30 for separating gaseous refrigerant and liquid refrigerant, the gas-liquid separation member 30 has a first outlet for flowing out gaseous refrigerant and a second outlet for flowing out liquid refrigerant; a heat exchange flow channel inlet of the first evaporator 10 is connected with the first outlet, and a heat exchange flow channel outlet of the second evaporator 20 is connected with the second outlet.

[0023] The dehumidifying device of the application comprises a first evaporator 10, a second evaporator 20 and a gas-liquid separation member 30, the initial moisture content of air is reduced by pre-cooling, the pre-cooled air is firstly cooled and dehumidified by the first evaporator 10, and then further dehumidified by the second evaporator 20, the average temperature of refrigerant in the second evaporator 20 is lower than that in the first evaporator 10, and the heat exchange efficiency of the second evaporator 20 is higher, so that the first evaporator 10 is used for cooling and dehumidifying air with a higher temperature, and the second evaporator 20 is used for cooling and dehumidifying air with a lower temperature, so that the air can be continuously treated by multiple evaporators, the dehumidifying efficiency of the dehumidifying device is improved by the method of staged deep dehumidification, low-temperature (within 3℃) and low-humidity (moisture content within 5g / kg) air can be output, and all evaporators in the dehumidifying device are in frost-free operation. Specifically, the refrigerant at the heat exchange flow channel outlet of the second evaporator 20 and the gaseous refrigerant in the gas-liquid separation member 30 are mixed and then flow into the first evaporator 10, so that the refrigerant at the heat exchange flow channel inlet of the first evaporator 10 is in a saturated state, the refrigerant at the heat exchange flow channel outlet of the first evaporator 10 is in a superheated state, liquid impact caused by the suction of the first booster 14 is avoided, and the air temperature at the outlet of the first evaporator 10 is relatively high (generally not lower than 10℃), so that the risk of frosting is avoided; the liquid refrigerant in the gas-liquid separation member 30 provides the cold energy required for deep dehumidification in the second evaporator 20, so that the refrigerant in the second evaporator 20 is basically in a saturated state, the heat exchange efficiency of the second evaporator 20 is fully ensured, the temperature difference between the refrigerant in the second evaporator 20 and the air flowing therethrough is reduced, and in addition, the average temperature of the refrigerant in the second evaporator 20 is higher than 0℃, so that the frosting problem caused by the surface temperature of the second evaporator 20 being too low is avoided. Therefore, the dehumidifying device of the application solves the problem that the refrigeration dehumidifying system in the prior art cannot simultaneously consider simple structure and frost-free operation in the deep dehumidification process.

[0024] Specifically, the dehumidification device of the present application is provided with a first evaporator 10 and a second evaporator 20, which separates the air cooling and dehumidification process into two cooling and dehumidification stages, i.e., the inlet and outlet of the saturated refrigerant and the inlet of the saturated refrigerant and the outlet of the overheated refrigerant, and is provided with a gas-liquid separation member 30 to separate the gaseous refrigerant and the liquid refrigerant. The dehumidification device of the present application has a simple structure, convenient control, meets the requirement of deep dehumidification, and has no risk of frost formation.

[0025] In the present embodiment, the dehumidification device further comprises a first pipeline 1 and a pressure adjusting member 40. The inflow end and the outflow end of the first pipeline 1 are respectively connected to the first outlet and the heat exchange flow channel inlet of the first evaporator 10. The pressure adjusting member 40 is arranged on the first pipeline 1 and is used to adjust the real-time pressure of the gaseous refrigerant in the first pipeline 1, to adjust the evaporation temperature of the gaseous refrigerant flowing into the first evaporator 10, and to realize high-efficiency heat exchange of the first evaporator 10.

[0026] Specifically, the pressure adjusting member 40 is a pressure adjusting valve, which can also adjust the pressure difference between the two ends of the pressure adjusting member 40 to ensure the normal flow of the refrigerant.

[0027] In the present embodiment, the dehumidification device further comprises a first condenser 50. The air flow passage inlet of the first condenser 50 is connected to the air flow passage outlet of the second evaporator 20, so that the air flowing out of the second evaporator 20 enters the first condenser 50 to be heated. The heat exchange flow channel outlet of the first condenser 50 is connected to the inlet of the gas-liquid separation member 30 to introduce the refrigerant into the gas-liquid separation member 30. The heat exchange flow channel inlet of the first condenser 50 is connected to the heat exchange flow channel outlet of the first evaporator 10.

[0028] Specifically, the temperature of the air flowing out of the second evaporator 20 is low, and the humidity content is also low, which may not meet the requirement of the supply air temperature. The air enters the first condenser 50 to be heated. The design of the first condenser 50 realizes high-efficiency liquefaction of the refrigerant vapor, and at the same time, the heat released during the liquefaction of the refrigerant vapor is used to heat the air that has been deeply dehumidified, so that the originally wasted heat is converted into useful energy, improving the overall energy efficiency of the dehumidification device. The heat exchange flow channel outlet of the first condenser 50 is directly connected to the inlet of the gas-liquid separation member 30, so that the refrigerant flowing out of the first condenser 50 is introduced into the gas-liquid separation member 30. The heat exchange flow channel inlet of the first condenser 50 is connected to the heat exchange flow channel outlet of the first evaporator 10, so that the refrigerant vapor flowing out of the first evaporator 10 can enter the first condenser 50 to be liquefied. This process not only recovers the energy of the refrigerant, but also ensures the continuity of the refrigerant circulation and the long-term stable operation of the dehumidification device.

[0029] In the embodiment, the dehumidifying device further comprises a second pipeline 2 and a third pipeline 3, the inflow end and the outflow end of the second pipeline 2 are respectively connected with the heat exchange flow channel outlet of the first condenser 50 and the inlet of the gas-liquid separation member 30, the first pressure reducing member 15 is arranged on the second pipeline 2, and is used for reducing the pressure of the refrigerant in the second pipeline 2; the inflow end and the outflow end of the third pipeline 3 are respectively connected with the heat exchange flow channel outlet of the first evaporator 10 and the heat exchange flow channel inlet of the first condenser 50, and the first pressure increasing member 14 is arranged on the third pipeline 3, and is used for increasing the pressure of the refrigerant in the third pipeline 3.

[0030] Specifically, by arranging the first pressure reducing member 15 on the second pipeline 2, the refrigerant is reduced in pressure before entering the gas-liquid separation member 30, so that the refrigerant can evaporate at a lower temperature and absorb more humid heat, thereby improving the dehumidifying efficiency. At the same time, the first pressure increasing member 14 arranged on the third pipeline 3 increases the pressure of the refrigerant after leaving the first evaporator 10, so as to ensure that the refrigerant can be fully liquefied and release heat in the first condenser 50, improve the condensing efficiency, and reduce the energy consumption.

[0031] Optionally, the first pressure increasing member 14 is a compressor, and the first pressure reducing member 15 is an expansion valve.

[0032] In the embodiment, the dehumidifying device further comprises a fourth pipeline 4 and a fifth pipeline 7, the inflow end and the outflow end of the fourth pipeline 4 are respectively connected with the second outlet and the heat exchange flow channel inlet of the second evaporator 20, the inflow end and the outflow end of the fifth pipeline 7 are respectively connected with the heat exchange flow channel outlet of the second evaporator 20 and the heat exchange flow channel inlet of the first evaporator 10, and the outflow end of the first pipeline 1 is connected with the fifth pipeline 7.

[0033] Specifically, by directly conveying the liquid refrigerant to the heat exchange flow channel inlet of the second evaporator 20 through the fourth pipeline 4, it can be ensured that the refrigerant is in the best heat exchange state in the second evaporator 20, so that the liquid refrigerant can absorb a large amount of latent heat in the evaporation process, and it can be ensured that the air can be deeply cooled when passing through the second evaporator 20, thereby further reducing the humidity of the air. The fifth pipeline 7 is arranged, so that the refrigerant at the heat exchange flow channel outlet of the second evaporator 20 and the gaseous refrigerant in the gas-liquid separation member 30 are fully mixed and then flow into the first evaporator 10.

[0034] In the embodiment, the gas-liquid separation member 30 comprises a shell 33, the shell 33 surrounds a cavity for accommodating the refrigerant to be separated, the bottom of the shell 33 is provided with a second outlet, the top of the shell 33 is provided with a first outlet and an inlet, and the first outlet, the second outlet and the inlet are all connected with the cavity; the dehumidifying device further comprises a U-shaped communication pipe 37, one end of the U-shaped communication pipe 37 is connected with the top of the cavity, and the other end of the U-shaped communication pipe is connected with the inflow end of the first pipeline 1.

[0035] Specifically, the shell 33 encloses a cavity for containing the refrigerant to be separated (two-phase refrigerant containing a small part of flash gas flowing out of the first pressure reducing device 15), and the gas-liquid separation device 30 separates the refrigerant to be separated into two parts of gas and liquid, which avoids the problem of low heat exchange efficiency caused by unstable state of the refrigerant in the traditional system. The gaseous refrigerant plays a role in improving the heat exchange efficiency in the first evaporator 10, and the liquid refrigerant provides the cold energy required for deep dehumidification in the second evaporator 20, which has clear division of labor and improves the energy efficiency and stability of the entire system. At the same time, the U-shaped communication pipe 37 serves as a bridge connecting the gas-liquid separation device 30 and the first pipeline 1, ensuring smooth flow of gaseous refrigerant and avoiding flow interruption or blockage, which is crucial for maintaining continuous operation of the entire dehumidification device.

[0036] In the embodiment, the dehumidification device further comprises a pre-cooling device 60, the heat exchange flow passage of the pre-cooling device 60 is used for passing in a cooling liquid, the air flow passage inlet of the pre-cooling device 60 is used for passing in air, and the air flow passage outlet of the pre-cooling device 60 is connected with the air flow passage inlet of the first evaporator 10, so that the pre-cooling device 60 pre-cools and dehumidifies the air.

[0037] Specifically, the heat exchange flow passage of the pre-cooling device 60 is used for passing in a cooling liquid, the cooling liquid flows in the heat exchange flow passage of the pre-cooling device 60, exchanges heat with the air, and absorbs heat in the air, so that the pre-cooling device 60 first pre-cools the air, reduces the temperature of the air, and further reduces the humidity content in the air. The temperature of the air is reduced, and its capacity to contain water vapor is also reduced, thereby causing part of the water in the air to condense into water droplets, preliminarily achieving dehumidification. This process not only reduces the burden of the subsequent evaporator, but also improves the dehumidification efficiency of the entire dehumidification device.

[0038] Specifically, the heat exchange flow passage of the pre-cooling device 60 is used for passing in a cooling liquid (cooling water 8), and the cooling water 9 is formed after the air is cooled and dehumidified.

[0039] In the embodiment, the dehumidification device further comprises a third evaporator 70 and a second condenser 80, the air flow passage of the third evaporator 70 is connected with the air flow passage outlet of the first evaporator 10 and the air flow passage inlet of the second evaporator 20 at two ends respectively, the air flow passage inlet of the second condenser 80 is connected with the air flow passage outlet of the first condenser 50, and the refrigerants in the third evaporator 70 and the second condenser 80 are exchangeable.

[0040] Specifically, with the addition of the third evaporator 70, the air is cooled again before entering the second evaporator 20, which strengthens the dehumidification process. Since the third evaporator 70 is located between the first two evaporators, it can serve as an intermediate reinforcement link for deep dehumidification, ensuring that the air has been sufficiently pre-cooled when entering the second evaporator 20, reducing the moisture content, and thus more effectively achieving the standard of deep dehumidification. The presence of the second condenser 80 allows the deeply dehumidified air to be heated again to adjust the supply air temperature. The flexible exchange of refrigerant between the third evaporator 70 and the second condenser 80 can adjust the refrigerant state of each component according to actual needs, ensuring full utilization of refrigerant during dehumidification and reheating, avoiding energy waste, and improving the thermal efficiency and operating economy of the entire dehumidification device. Through the cooperation of the third evaporator 70 and the second condenser 80, the temperature gradient in the air handling process can be better managed, avoiding excessively low surface temperature of the third evaporator 70, thus effectively avoiding the problem of frosting.

[0041] In this embodiment, the dehumidification device further comprises a sixth pipeline 5, the inflow end and the outflow end of the sixth pipeline 5 are respectively connected to the heat exchange flow channel outlet of the third evaporator 70 and the heat exchange flow channel inlet of the second condenser 80, and the sixth pipeline 5 is sequentially provided with a second pressure booster 11 and an air-cooled heat dissipation component 12. The second pressure booster 11 is used to pressurize the refrigerant flowing therethrough, and the air-cooled heat dissipation component 12 is used to dissipate heat from the refrigerant in the sixth pipeline 5 to adjust the temperature of the refrigerant flowing into the second condenser 80.

[0042] Specifically, the sixth pipeline 5 ensures the continuity of the refrigerant circulation path, and the refrigerant vapor flowing out of the third evaporator 70 can enter the second condenser 80 for liquefaction, avoiding additional energy loss. The second pressure booster 11 increases the temperature and pressure of the refrigerant vapor in the second condenser 80 by pressurizing it. The air-cooled heat dissipation component 12 dissipates heat from the refrigerant after the second pressure booster 11, discharging excess heat from the refrigerant to the outside, ensuring that the refrigerant reaches the optimal liquefaction temperature before entering the second condenser 80. Excessively high refrigerant temperature increases the energy consumption of the second condenser 80, and through the adjustment of the air-cooled heat dissipation component 12, the efficiency of the refrigerant circulation can be maintained.

[0043] In the embodiment, the air-cooled heat dissipation component 12 comprises a heat dissipation fan 121 and a finned surface cooler 122, the finned surface cooler 122 is internally provided with a heat exchange flow channel and externally provided with heat dissipation fins, the heat dissipation fan 121 is arranged on one side or both sides of the finned surface cooler 122, the refrigerant in the sixth pipeline 5 flows through the heat exchange flow channel in the finned surface cooler 122 into the second condenser 80, and the operation frequency of the heat dissipation fan 121 is adjustably arranged; and / or, the dehumidification device further comprises a seventh pipeline 6, the inflow end and the outflow end of the seventh pipeline 6 are respectively connected with the heat exchange flow channel outlet of the second condenser 80 and the heat exchange flow channel inlet of the third evaporator 70, and the second pressure reducing component 13 is arranged on the seventh pipeline 6, for reducing the pressure of the refrigerant in the seventh pipeline 6.

[0044] Specifically, the heat dissipation fan 121 is arranged on one side or both sides of the finned surface cooler 122 to enhance the heat dissipation capacity thereof. The heat exchange flow channel inside the finned surface cooler 122 allows the refrigerant to pass through, and the heat dissipation fins arranged outside increase the contact area with the external air and improve the heat dissipation efficiency. The adjustability of the fan operation frequency means that the fan speed can be dynamically adjusted according to the actual heat load and operation condition. This not only helps to quickly dissipate heat under high heat load, but also reduces energy consumption under low heat load.

[0045] Specifically, by arranging the second pressure reducing component 13 on the seventh pipeline 6, the refrigerant is adjusted in flow by the second pressure reducing component 13 according to the load change before leaving the second condenser 80 and entering the third evaporator 70, so as to ensure that the refrigerant at the heat exchange flow channel outlet of the third evaporator 70 is in a superheated state, preventing the second pressure increasing component 11 from being damaged by liquid impact operation.

[0046] Specifically, optionally, the second pressure increasing component 11 is a compressor for providing refrigerant circulation power; and the second pressure reducing component 13 is an expansion valve for refrigerant throttling and pressure reduction.

[0047] In specific implementation, the air to be treated is sequentially cooled and dehumidified by the pre-cooling component 60, the first evaporator 10, the third evaporator 70 and the second evaporator 20, so as to reach the required low humidity state, and then the low-temperature and low-humidity air is heated and temperature-adjusted by the first condenser 50 and the second condenser 80 to reach the air supply temperature requirement. The excess heat in the refrigerant flowing out of the third evaporator 70 is discharged by the air-cooled heat dissipation component 12. The dehumidification device of the present application has simple structure and can achieve deep dehumidification requirement only by using a direct expansion system, has high thermal efficiency, no frosting problem and low operation energy consumption.

[0048] Specifically, the saturated wet air flowing out of the pre-cooling component 60 has a temperature of 12℃; the air flowing out of the third evaporator 70 has a temperature of 7℃, which can ensure that the third evaporator 70 is in a frost-free operating condition; and the air flowing out of the second evaporator 20 is low-temperature (within 3℃) and low-humidity (moisture content within 5g / kg) air.

[0049] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0050] The dehumidification device of the present application comprises a first evaporator 10, a second evaporator 20 and a gas-liquid separation member 30, by pre-cooling the air, reducing its initial moisture content, the pre-cooled air is first cooled and dehumidified by the first evaporator 10, and then further dehumidified by the second evaporator 20, the average temperature of the refrigerant in the second evaporator 20 is lower than that in the first evaporator 10, and the heat exchange efficiency of the second evaporator 20 is higher, so the first evaporator 10 is used for cooling and dehumidifying the air with higher temperature, and the second evaporator 20 is used for cooling and dehumidifying the air with lower temperature, so that the air can be continuously processed by multiple evaporators, this staged deep dehumidification method improves the dehumidification efficiency of the dehumidification device, can output low-temperature (within 3℃) and low-humidity (moisture content within 5g / kg) air, and all evaporators in the dehumidification device are in frost-free operation state. Specifically, the refrigerant at the outlet of the heat exchange flow channel of the second evaporator 20 and the gaseous refrigerant in the gas-liquid separation member 30 are mixed and flow into the first evaporator 10, so that the refrigerant at the inlet of the heat exchange flow channel of the first evaporator 10 is in a saturated state, and the refrigerant at the outlet of the heat exchange flow channel of the first evaporator 10 is in a superheated state, avoiding liquid impact and damage caused by the first pressure booster 14 inhaling liquid refrigerant, and the outlet air temperature of the first evaporator 10 is relatively high (generally not lower than 10℃), which will not cause frosting risk; the liquid refrigerant in the gas-liquid separation member 30 provides the cold energy required for deep dehumidification in the second evaporator 20, so that the refrigerant in the second evaporator 20 is basically in a saturated state, fully ensuring the heat exchange efficiency of the second evaporator 20, reducing the temperature difference between the refrigerant in the second evaporator 20 and the air flowing therethrough, in addition, the average temperature of the refrigerant in the second evaporator 20 is higher than 0℃, avoiding the frosting problem caused by the surface temperature of the second evaporator 20 being too low. Therefore, the dehumidification device of the present application solves the problem that the refrigeration dehumidification system in the prior art cannot balance the simplicity of structure and frost-free operation during deep dehumidification.

[0051] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical" and "horizontal" as can be perceived herein relative to the accompanying drawings refer to the orientation of the components being described. However, it is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device described herein relative to the other device or structure is inverted, then a spatially relative term such as "above" can be interpreted as meaning "below" or "below" can be interpreted as meaning "above". The device can also be oriented in other ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0052] In addition, it should be pointed out that the use of "first", "second" and the like words to limit parts, only for the convenience of the corresponding parts for the distinction, such as no other declaration, the above words have no special meaning, therefore can not be understood as limiting the scope of the present application.

[0053] The preferred embodiments of the present application have been described above with the aid of drawing only and are not limited to those preferred embodiments, and as those skilled in the art will readily appreciate, changes and modification can be made thereto without departing from the spirit and scope of the present application. Any further modifications, changes, improvements, and the like that come within the spirit and scope of the present application should be secured to the application.

Claims

1. A dehumidifying apparatus characterized by comprising: The application relates to a dehumidifying device, which comprises: a first evaporator (10) and a second evaporator (20), through which pre-cooled air flows in sequence to be cooled and dehumidified; a gas-liquid separation member (30) for separating gaseous refrigerant and liquid refrigerant, the gas-liquid separation member (30) having a first outlet for gaseous refrigerant and a second outlet for liquid refrigerant; a heat exchange channel inlet of the first evaporator (10) is connected with the first outlet and connected with a heat exchange channel outlet of the second evaporator (20), and a heat exchange channel inlet of the second evaporator (20) is connected with the second outlet.

2. The dehumidification apparatus according to claim 1, wherein, The dehumidifying device further comprises a first pipeline (1) and a pressure adjusting member (40), an inflow end and an outflow end of the first pipeline (1) are connected with the first outlet and a heat exchange channel inlet of the first evaporator (10) respectively, and the pressure adjusting member (40) is arranged on the first pipeline (1) and used for adjusting real-time pressure of gaseous refrigerant in the first pipeline (1).

3. The dehumidification apparatus of claim 1, wherein, The dehumidifying device further comprises a first condenser (50), a gas flow channel inlet of the first condenser (50) is connected with a gas flow channel outlet of the second evaporator (20) to make the air flowing out of the second evaporator (20) enter the first condenser (50) to be heated, a heat exchange channel outlet of the first condenser (50) is connected with an inlet of the gas-liquid separation member (30) to make the first condenser (50) supply refrigerant to the gas-liquid separation member (30), and a heat exchange channel inlet of the first condenser (50) is connected with a heat exchange channel outlet of the first evaporator (10).

4. The dehumidification apparatus according to claim 3, wherein, The dehumidifying device further comprises a second pipeline (2) and a third pipeline (3), an inflow end and an outflow end of the second pipeline (2) are connected with the heat exchange channel outlet of the first condenser (50) and the inlet of the gas-liquid separation member (30) respectively, a first pressure reducing member (15) is arranged on the second pipeline (2) and used for reducing pressure of refrigerant in the second pipeline (2), an inflow end and an outflow end of the third pipeline (3) are connected with the heat exchange channel outlet of the first evaporator (10) and the heat exchange channel inlet of the first condenser (50) respectively, and a first pressure increasing member (14) is arranged on the third pipeline (3) and used for increasing pressure of refrigerant in the third pipeline (3).

5. The dehumidification apparatus of claim 2, wherein, The dehumidifying device further comprises a fourth pipeline (4) and a fifth pipeline (7), an inflow end and an outflow end of the fourth pipeline (4) are connected with the second outlet and a heat exchange channel inlet of the second evaporator (20) respectively, an inflow end and an outflow end of the fifth pipeline (7) are connected with the heat exchange channel outlet of the second evaporator (20) and the heat exchange channel inlet of the first evaporator (10) respectively, and the outflow end of the first pipeline (1) is connected with the fifth pipeline (7).

6. The dehumidification apparatus of claim 2, wherein, The gas-liquid separation member (30) comprises a shell (33) which encloses a cavity for containing the refrigerant to be separated, the bottom of the shell (33) is provided with the second outlet, the top of the shell (33) is provided with the first outlet and the inlet, the first outlet, the second outlet and the inlet all communicate with the cavity; the dehumidification device further comprises a U-shaped communication pipe (37), one end of the U-shaped communication pipe (37) communicates with the top of the cavity, the other end of the U-shaped communication pipe communicates with the inflow end of the first pipeline (1).

7. The dehumidification apparatus of claim 1, wherein, The dehumidification device further comprises a pre-cooling member (60), the heat exchange flow passage of the pre-cooling member (60) is used for passing in a cooling liquid, the air flow passage inlet of the pre-cooling member (60) is used for passing in air, and the air flow passage outlet of the pre-cooling member (60) communicates with the air flow passage inlet of the first evaporator (10) to pre-cool and dehumidify the air.

8. The dehumidification apparatus of claim 3, wherein, The dehumidification device further comprises a third evaporator (70) and a second condenser (80), the air flow passage of the third evaporator (70) has two ends respectively communicating with the air flow passage outlet of the first evaporator (10) and the air flow passage inlet of the second evaporator (20), the air flow passage inlet of the second condenser (80) communicates with the air flow passage outlet of the first condenser (50), and the refrigerants in the third evaporator (70) and the second condenser (80) are exchangeable.

9. The dehumidification apparatus of claim 8, wherein, The dehumidification device further comprises a sixth pipeline (5), the inflow end and the outflow end of the sixth pipeline (5) respectively communicate with the heat exchange flow passage outlet of the third evaporator (70) and the heat exchange flow passage inlet of the second condenser (80), and the sixth pipeline (5) is sequentially provided with a second pressure booster (11) and an air-cooled heat dissipation component (12), the second pressure booster (11) is used for boosting the pressure of the refrigerant flowing therethrough, and the air-cooled heat dissipation component (12) is used for dissipating heat of the refrigerant in the sixth pipeline (5) to adjust the temperature of the refrigerant flowing into the second condenser (80).

10. The dehumidification apparatus of claim 9, wherein, The air-cooled heat dissipation component (12) comprises a heat dissipation fan (121) and a finned surface air cooler (122), the finned surface air cooler (122) is internally provided with a heat exchange flow passage and externally arranged with heat dissipation fins, the heat dissipation fan (121) is arranged on one side or both sides of the finned surface air cooler (122), the refrigerant in the sixth pipeline (5) flows through the heat exchange flow passage in the finned surface air cooler (122) and enters the second condenser (80), and the operating frequency of the heat dissipation fan (121) is adjustably arranged; and / or, the dehumidification device further comprises a seventh pipeline (6), the inflow end and the outflow end of the seventh pipeline (6) respectively communicate with the heat exchange flow passage outlet of the second condenser (80) and the heat exchange flow passage inlet of the third evaporator (70), and the seventh pipeline (6) is provided with a second pressure reducer (13) for reducing the pressure of the refrigerant in the seventh pipeline (6).

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