Dehumidification system

Abstract

The utility model discloses a dehumidification system, including compressor, refrigerant main circulation loop, including first condenser, second condenser, first throttling device, first evaporator, second throttling device, third condenser, fourth condenser, third throttling device and second evaporator that connect in proper order, air handling channel and condensate water treatment circuit Condensate water treatment circuit includes the water pan for collecting the condensate water of second evaporator, the water pump for conveying the condensate water and third condenser, third condenser is set up for the heat exchange between the refrigerant after discharging from first evaporator and throttling through second throttling device and the condensate water pumped from the water pan, to cool the refrigerant and heat the condensate water, fourth condenser is used for the condensation heat release of the refrigerant after flowing through third condenser.

Description

Technical Field

[0001] This utility model relates to the field of air humidity control equipment technology, and in particular to a dehumidification system. Background Technology

[0002] With increasing demands for comfort in living and working environments, and stringent requirements for humidity control in specific industrial production and warehousing environments, dehumidification equipment has become widely used. Traditional dehumidification systems typically employ a refrigeration cycle principle. Moist air flows over the surface of a low-temperature evaporator, where water vapor condenses into liquid water and is collected, thus reducing the absolute humidity of the air. To improve energy efficiency and enhance the comfort of the exhaust air, many dehumidification systems also include a condenser after the evaporator. This condenser utilizes the heat released during refrigerant condensation to reheat the dehumidified and cooled air, resulting in dry air with a suitable temperature and lower relative humidity.

[0003] In some existing technologies aimed at improving dehumidification performance, complex refrigeration cycle systems with multiple evaporators and condensers are designed. For example, auxiliary evaporators are used to pre-cool the air entering the main evaporator, and auxiliary condensers are used to pre-reheat the air dehumidified by the main evaporator. These designs improve dehumidification efficiency and energy recovery to some extent.

[0004] However, existing dehumidification systems still have room for improvement in practical applications. On the one hand, how to further optimize the energy flow within the refrigeration cycle to more efficiently improve the dehumidification performance of key components (such as the main evaporator) remains a direction for continuous exploration in the industry. On the other hand, traditional dehumidification systems have a relatively simple method for treating condensate generated by the evaporator, usually collecting and discharging it directly. If the low-temperature condensate is directly discharged into the dehumidifier's water tank, in a humid and hot environment, the temperature of the outer wall of the water tank may be lower than the dew point of the surrounding air, resulting in secondary condensation on the outer wall. This phenomenon not only affects the aesthetics and cleanliness of the equipment but may also have adverse effects on the equipment itself or the surrounding environment. How to more effectively treat condensate, make the most of its potential value, and avoid the negative problems it causes are technical pain points that have received little attention or have not been perfectly solved in existing technologies.

[0005] Therefore, developing a new type of dehumidification system that can effectively improve dehumidification performance, properly handle condensate, and avoid secondary condensation on the outer wall of the water storage tank is of great practical significance and application value. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dehumidification system that aims to effectively improve the dehumidification effect of the secondary evaporator by optimizing the refrigerant circulation path and innovatively treating the condensate produced by the evaporator. It also avoids the formation of condensate on the outer wall of the dehumidifier's water tank, thereby improving the user experience and the reliability of the equipment operation.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A dehumidification system, comprising: compressor; The refrigerant main circulation loop includes a first condenser, a second condenser, a first throttling device, a first evaporator, a second throttling device, a third condenser, a fourth condenser, a third throttling device, and a second evaporator connected in sequence. An air handling passage that passes sequentially through the first evaporator and the second evaporator; And the condensate treatment circuit; The second evaporator is used to cool and dehumidify the air flowing through the air handling passage and to produce condensate. The condensate treatment circuit includes a water receiving tray for collecting condensate generated by the second evaporator, a water pump for conveying the condensate, and the third condenser. The third condenser is configured to exchange heat between the refrigerant discharged from the first evaporator and throttled by the second throttling device and the condensate pumped from the drip tray, so as to cool the refrigerant and heat the condensate. The fourth condenser is used to condense and release heat from the refrigerant flowing through the third condenser. The third throttling device is located after the fourth condenser and before the second evaporator, and is used to throttle the refrigerant.

[0008] As a preferred technical solution, the first condenser and the second condenser are connected in series after the compressor and before the first throttling device, for condensing and subcooling the refrigerant from the compressor.

[0009] As another preferred technical solution, the third throttling device includes a refrigerant distributor, which is used to evenly distribute the throttled refrigerant to multiple parallel evaporation pipes of the second evaporator.

[0010] As another preferred technical solution, after the air handling channel flows through the second evaporator, it also passes through the fourth condenser, the second condenser and the first condenser in sequence, so as to use the heat discharged by the fourth condenser, the second condenser and the first condenser to reheat the air that has been dehumidified by the second evaporator.

[0011] As another preferred technical solution, the condensate treatment circuit also includes a drain pipe for discharging the condensate heated by the third condenser.

[0012] As a more preferred technical solution, the dehumidification system further includes a fan for driving airflow through the air handling channel.

[0013] As a further preferred technical solution, the dehumidification system is installed in a portable dehumidifier, and the water receiving tray of the condensate treatment circuit is connected to the water storage tank of the dehumidifier for introducing the condensate heated by the third condenser into the water storage tank of the dehumidifier.

[0014] Compared with the prior art, this utility model has the following advantages: This invention optimizes the internal energy flow of the system and innovates the condensate treatment method by cleverly designing a third condenser and constructing a unique heat exchange path between condensate and refrigerant. First, the refrigerant discharged from the first evaporator exchanges heat with the low-temperature condensate from the second evaporator in the third condenser before entering the fourth condenser. During this process, the refrigerant is pre-cooled, which helps improve the condition of the refrigerant subsequently. Then, the refrigerant, after being condensed in the fourth condenser and throttled by the third throttling device, has its condition further optimized. In particular, when the third throttling device includes a refrigerant distributor, the throttled low-temperature, low-pressure refrigerant can be more evenly distributed into the parallel evaporation lines of the second evaporator. This precise pre-cooling process, combined with uniform flow distribution, enables the second evaporator, as the core dehumidification component, to achieve a more consistent and efficient evaporation process across its entire heat exchange surface. This avoids uneven heat exchange that may result from insufficient or excessive refrigerant flow in localized areas, thereby significantly improving the overall technical effect of the second evaporator in cooling and dehumidifying the air. This allows the air to be dried more thoroughly and enhances the operational stability of the system.

[0015] Secondly, another significant advantage of this invention lies in its effective management of condensate temperature. The condensate produced by the second evaporator during deep dehumidification is typically at a low temperature. If directly discharged into the dehumidifier's storage tank, it can easily lead to an overall low temperature in the tank. In high-humidity environments, the surface temperature of the tank's outer wall may fall below the dew point of the surrounding air, inevitably causing condensation and secondary condensation. This not only affects the cleanliness of the equipment's appearance but may also lead to hygiene problems due to dampness or potential damage to the equipment itself and the surrounding environment. This invention utilizes a third condenser to heat this low-temperature condensate using the heat of the refrigerant, significantly increasing the temperature of the condensate entering the storage tank. This maintains the tank's temperature at a relatively high level, effectively preventing the outer wall temperature from falling below the ambient air dew point, thus completely eliminating the problem of secondary condensation, improving the user experience, and enhancing the equipment's adaptability and reliability in various environments. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the dehumidification system of this utility model. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0018] Example 1 like Figure 1 The diagram shown is a structural schematic of a dehumidification system according to this invention. This dehumidification system, through specific refrigerant circulation paths, condensate treatment methods, and airflow path designs, aims to effectively regulate air humidity.

[0019] In one specific embodiment, the dehumidification system of this invention includes a compressor 9 and a refrigerant main circulation loop formed by refrigerant pipelines connected in sequence. This refrigerant main circulation loop includes at least a first condenser 1, a second condenser 2, a first throttling device 3, a first evaporator 4, a second throttling device 5, a third condenser 6, a fourth condenser 7, a third throttling device 8, and a second evaporator 11. The system also includes an air handling channel to guide the air to be treated through specific heat exchange components. Air handling and refrigerant circulation are two interrelated core processes that enable the dehumidification function of this system.

[0020] On the refrigerant circulation side, compressor 9 is responsible for compressing the low-temperature, low-pressure gaseous refrigerant, transforming it into a high-temperature, high-pressure gaseous refrigerant. This high-temperature, high-pressure refrigerant, after being discharged from compressor 9, first enters the first condenser 1 for condensation, releasing some heat. Subsequently, the refrigerant continues to flow into the second condenser 2, where it undergoes further cooling to achieve subcooling. Subcooling helps ensure that the refrigerant entering the subsequent first throttling device 3 is primarily liquid, or a gas-liquid two-phase flow with a high liquid content, which has a positive effect on the stability and efficiency of the throttling process.

[0021] The subcooled liquid refrigerant, after passing through the second condenser 2, will flow through the first throttling device 3. The first throttling device 3 can be a throttling element such as a thermostatic expansion valve or a capillary tube. Its function is to throttle and reduce the pressure of the refrigerant while simultaneously lowering its temperature, so that the refrigerant is transformed into a low-temperature, low-pressure gas-liquid two-phase mixture state, and then enters the first evaporator 4.

[0022] On the air handling side, humid air driven by a fan 10 first enters the air handling passage and flows through the first evaporator 4. In the first evaporator 4, low-temperature, low-pressure refrigerant from the first throttling device 3 absorbs the heat carried by the air and evaporates, thereby initially cooling the air and causing some of the water vapor in the air to condense.

[0023] The refrigerant exiting from the first evaporator 4 is in a low-temperature, low-pressure gaseous or gas-liquid mixed state. It will flow through the second throttling device 5 for further throttling, and its temperature and pressure will be further reduced before entering the third condenser 6.

[0024] The system also includes a condensate treatment loop. As air flows through the subsequent second evaporator 11, its temperature is deeply cooled below the air dew point temperature, causing a large amount of water vapor in the air to condense into liquid water. This condensate formed on the surface of the second evaporator 11 is collected by a drip tray 12 located below it. A water pump 13 is provided in the condensate treatment loop, which is responsible for transporting the low-temperature condensate collected in the drip tray 12 to the third condenser 6.

[0025] Inside the third condenser 6, the relatively warm refrigerant exiting the second throttling device 5 exchanges heat with the low-temperature condensate from the second evaporator 11, pumped by the water pump 13. During this process, the refrigerant releases heat to the condensate, thus lowering its own temperature—i.e., pre-cooling. Correspondingly, the condensate absorbs heat from the refrigerant, raising its own temperature. The condensate, heated by the third condenser 6, can be stored in the dehumidifier's water tank (not shown in the figure) through a specially designed drain pipe, or discharged directly to the outside of the system as needed.

[0026] The pre-cooled refrigerant exiting from the third condenser 6 will enter the fourth condenser 7. In the fourth condenser 7, the refrigerant will undergo a condensation process and release heat.

[0027] Subsequently, the refrigerant exiting the fourth condenser 7, typically in a liquid state or a high-liquid-content gas-liquid two-phase flow, will flow through the third throttling device 8. In a preferred embodiment, the third throttling device 8 may include a refrigerant distributor 14 to promote uniform distribution of the refrigerant. After being throttled, depressurized, and cooled by the third throttling device 8, the refrigerant is transformed into a low-temperature, low-pressure gas-liquid two-phase refrigerant and is then introduced into the multiple parallel evaporation lines of the second evaporator 11 via the refrigerant distributor 14.

[0028] After initial dehumidification in the first evaporator 4, the air continues to flow through the air handling passage and enters the second evaporator 11. In the second evaporator 11, the low-temperature, low-pressure refrigerant from the third throttling device 8 absorbs heat carried by the air and evaporates, thus deeply cooling and dehumidifying the air. The gaseous refrigerant exiting the second evaporator 11, now typically as low-temperature, low-pressure superheated vapor, returns to the suction port of the compressor 9, thereby completing a full refrigerant cycle.

[0029] The low-temperature air, after deep dehumidification by the second evaporator 11, undergoes reheating to improve the parameters of the final exhaust air and recover energy. In this embodiment, the dehumidified cold air flows sequentially through the fourth condenser 7, the second condenser 2, and the first condenser 1 within the air handling channel. In these three condensers, the air absorbs the heat released by the refrigerant during condensation, resulting in a significant temperature increase. This multi-stage reheat process not only regulates the temperature and relative humidity of the exhaust air but also constitutes a crucial link in the system's internal energy recovery, contributing to improved overall operating efficiency of the dehumidification system. Finally, the air is discharged from the dehumidification system in a relatively dry and appropriately warm state.

[0030] Through the aforementioned structural design, particularly the series connection and heat exchange function of the third condenser 6 in the refrigerant and condensate circuits, this invention adjusts the refrigerant state entering the second evaporator 11. Combined with the use of the refrigerant distributor 14, this helps improve the dehumidification performance of the second evaporator 11. Furthermore, it utilizes some of the heat from the refrigerant to heat the condensate produced by the second evaporator 11, increasing the condensate discharge temperature. When this dehumidification system is applied to a portable dehumidifier, and this heated condensate is introduced into its water tank, the possibility of secondary condensation on the outer wall of the water tank due to excessively low temperature can be reduced.

Claims

1. A dehumidification system, characterized in that, include: compressor; The refrigerant main circulation loop includes a first condenser, a second condenser, a first throttling device, a first evaporator, a second throttling device, a third condenser, a fourth condenser, a third throttling device, and a second evaporator connected in sequence. An air handling passage that passes sequentially through the first evaporator and the second evaporator; And the condensate treatment circuit; The second evaporator is used to cool and dehumidify the air flowing through the air handling passage and to produce condensate. The condensate treatment circuit includes a water receiving tray for collecting condensate generated by the second evaporator, a water pump for conveying the condensate, and the third condenser. The third condenser is configured to exchange heat between the refrigerant discharged from the first evaporator and throttled by the second throttling device and the condensate pumped from the drip tray, so as to cool the refrigerant and heat the condensate. The fourth condenser is used to condense and release heat from the refrigerant flowing through the third condenser. The third throttling device is located after the fourth condenser and before the second evaporator, and is used to throttle the refrigerant.

2. The dehumidification system according to claim 1, characterized in that, The first condenser and the second condenser are connected in series after the compressor and before the first throttling device, and are used to condense and subcool the refrigerant from the compressor.

3. The dehumidification system according to claim 1 or 2, characterized in that, The third throttling device includes a refrigerant distributor, which is used to evenly distribute the throttled refrigerant to multiple parallel evaporation lines of the second evaporator.

4. The dehumidification system according to claim 1, characterized in that, After passing through the second evaporator, the air handling channel also passes through the fourth condenser, the second condenser, and the first condenser in sequence, for reheating the air that has been dehumidified by the second evaporator using the heat discharged from the fourth condenser, the second condenser, and the first condenser.

5. The dehumidification system according to claim 1, characterized in that, The condensate treatment circuit also includes a drain pipe for discharging the condensate heated by the third condenser.

6. The dehumidification system according to claim 1, characterized in that, The dehumidification system also includes a fan, which drives airflow through the air handling channel.

7. The dehumidification system according to claim 1, characterized in that, The dehumidification system is installed in the portable dehumidifier. The water receiving tray of the condensate treatment circuit is connected to the water storage tank of the dehumidifier and is used to guide the condensate heated by the third condenser into the water storage tank of the dehumidifier.

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