High-position negative pressure air inlet and low-position positive pressure multi-point high-speed air exhaust dehumidifier

Abstract

The application relates to a high-position negative-pressure air inlet, low-position positive-pressure multi-point high-speed air outlet dehumidifier, which comprises an indoor unit, the indoor unit adopts a ceiling type installation structure, comprises a machine shell, a plurality of air inlets are arranged on the upper end circumferential surface of the machine shell, a plurality of air outlets are arranged on the lower end circumferential surface of the machine shell, a fan module and an evaporator module are arranged in the machine shell, when running, indoor humid air enters the machine shell from the air inlets, becomes low-humidity air after being cooled and dehumidified by the evaporator module, the low-humidity air is sucked by the fan module and is discharged, the discharged positive-pressure low-humidity air is discharged at high speed through the air outlets, the high-density low-humidity air after being discharged dives outward at high speed, extrudes indoor humid air to gather in the middle and pass upward from the gap of the high-speed low-humidity air jet, and then enters the machine shell from the air inlets to carry out the next dehumidification cycle.

Description

Technical Field

[0001] This invention relates to the field of dehumidifier technology, and in particular to a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier. Background Technology

[0002] Spaces for many electrical equipment, such as underground or semi-underground transformer rooms and electrical switchgear rooms, are prone to temperature increases due to Joule heating of copper and aluminum wiring and circuit components like knife contactors, as well as increased humidity due to water seepage from the floor and walls. Condensation on the terminals, contactors, coils, copper busbars, thyristors, and other components of electrical equipment can cause arcing and short circuits. The water vapor in the humid air also reduces the insulation level of the air and insulating media, endangering the reliability and safety of industrial, commercial, and civil electrical systems.

[0003] In recent years, advancements in materials technology and high-voltage cable manufacturing processes, coupled with urban planning requirements for undergrounding high-voltage overhead power lines and the gradual development of urban underground utility tunnels, have collectively promoted the trend of burying power transmission and distribution networks underground. Currently, there are increasingly more underground and semi-underground transformer rooms and electrical switchgear rooms in cities. How to reduce the temperature and humidity in these enclosed underground electrical spaces, lower the partial pressure of water vapor in the air to restore the insulation performance of air and insulating media, and improve the operational safety of transformers, switchgear, and other electrical equipment has become a crucial technical task for power supply systems and electrical equipment users.

[0004] Addressing the common issues in underground and semi-underground electrical rooms, such as multiple rows of cabinet-type enclosures, poor air circulation, numerous Joule heat sources from copper-aluminum wiring and circuit components like knife-face contactors, and high moisture evaporation from floors and walls, which threaten the reliability and safety of electrical systems, if split-type wall-mounted or cabinet-type air conditioners are used in electrical room 1, please refer to [reference needed]. Figure 1 Because the cabinet 3 inside the electrical room 1 obstructs the air outlet of the air conditioner, there is a large ventilation blind spot in the electrical room, resulting in poor air circulation and failing to solve the fundamental problem.

[0005] If the electrical room uses ceiling-mounted fan coil units as the fourth terminal of the central air conditioning system, please refer to the following for the airflow organization method of the fan coil unit: "outer ring sinks, inner ring rises and recirculates". Figure 2 This results in a small coverage area and service range for a single fan coil unit, which also fails to solve the fundamental problem. However, using multiple units in a distributed configuration leads to excessively high equipment purchase and maintenance costs. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier, including an indoor unit. The indoor unit adopts a ceiling-mounted installation structure and includes a casing. The upper circumferential surface of the casing is provided with several air intakes, and the lower circumferential surface is provided with several air exhausts. The casing contains a fan module and an evaporator module. During operation, indoor humid air enters the casing through the air intakes, and after being cooled and dehumidified by the evaporator module, it becomes low-humidity air. The low-humidity air is then drawn in by the fan module and discharged. The discharged positive-pressure low-humidity air is ejected at high speed through the several air exhausts. The ejected high-density low-humidity air rushes outward at high speed, compressing the indoor humid air to converge towards the center and passing upward through the gaps in the high-speed low-humidity air jet. It then enters the casing through the several air intakes for the next dehumidification cycle.

[0007] Preferably, the evaporator module includes at least one evaporator, and the fan module includes at least one fan;

[0008] The dehumidifier also includes at least one compressor, at least one condenser, and at least one throttling device, wherein the compressor and condenser are respectively located indoors or outdoors.

[0009] Preferably, the housing is divided horizontally into a plurality of air chambers and a central partition cavity by at least one first partition, the central partition cavity being located between the plurality of air chambers, and a compressor is disposed in the central partition cavity;

[0010] The housing is divided into an upper air bag and a lower air bag by a second partition. The first partition is provided with a number of ventilation holes. The upper air bag and the lower air bag of each air bag are connected through a ventilation hole. The upper air bag is provided with the air intake and the lower air bag is provided with the air exhaust.

[0011] The evaporator module includes a plurality of evaporators, the fan module includes a plurality of fans, each upper air package contains at least one evaporator, and each upper air package and / or lower air package contains at least one fan, with the air intake or exhaust port of the fan facing the ventilation hole.

[0012] Preferably, a condenser is disposed within the partition cavity. The condenser is a shell-and-tube heat exchanger, and the refrigerant inlet of the shell-and-tube heat exchanger is connected to the refrigerant outlet of the compressor. The refrigerant outlet of the shell-and-tube heat exchanger is connected to the refrigerant inlets of several evaporators via a throttling device, or the refrigerant outlet of the shell-and-tube heat exchanger is connected to the refrigerant inlets of several evaporators via several throttling devices. The refrigerant outlets of several evaporators are all connected to the refrigerant inlet of the compressor.

[0013] The water channel of the shell-and-tube heat exchanger is connected to the cooling tower.

[0014] Preferably, the refrigerant outlet of the shell-and-tube heat exchanger is connected to the refrigerant inlet of the evaporator via a number of throttling devices. A subcooling heat exchanger is also provided between the refrigerant outlet of the shell-and-tube heat exchanger and the inlet of the throttling devices. Both the subcooling heat exchanger and the evaporator are finned tube heat exchangers. The subcooling heat exchanger is located inside the upper air chamber and is arranged side by side at the air outlet of the evaporator.

[0015] Preferably, a fan is horizontally arranged inside the upper air chamber, with the fan's air intake facing the evaporator's air outlet and the fan's air exhaust facing the ventilation hole, and communicating with the lower air chamber through the ventilation hole; or,

[0016] A fan is horizontally installed inside the lower air chamber, with the fan's air intake facing the ventilation hole and communicating with the upper air chamber through the ventilation hole; or,

[0017] A fan is vertically installed inside the upper air chamber. The air intake of the fan faces the air outlet of the evaporator, and the air exhaust of the fan faces the ventilation hole and is connected to the lower air chamber through the ventilation hole.

[0018] Preferably, each of the upper air chambers is provided with at least one condenser, and both the condenser and the evaporator are finned tube heat exchangers. The condensers are arranged side by side at the air outlet of the evaporator. The refrigerant outlet of the compressor is connected to the refrigerant inlet of a plurality of the condensers respectively. The refrigerant outlet of each condenser is connected to the refrigerant inlet of the compressor through a throttling device and a corresponding evaporator in sequence.

[0019] Preferably, the condenser and evaporator are integrated into one unit.

[0020] Preferably, an air bag is provided on each side of the partition cavity, and two evaporators and a fan are symmetrically arranged in the two air bags, and the two evaporators in the upper air bag are symmetrically arranged.

[0021] Preferably, the housing is divided into an upper air chamber and a lower air chamber by a second partition. A plurality of air intakes are provided on the circumferential surface of the upper air chamber, and a plurality of air exhausts are provided on the circumferential surface of the lower air chamber. The second partition is provided with ventilation holes that connect the upper air chamber and the lower air chamber, and the air intake or exhaust port of the fan is positioned facing the ventilation holes.

[0022] At least one enclosed evaporator is provided inside the upper air bag;

[0023] The dehumidifier also includes an outdoor unit installed outdoors, which includes a compressor and a condenser.

[0024] Preferably, the upper air chamber is provided with two enclosed evaporators, which form an open-ended annular structure. The refrigerant inlet of the condenser is connected to the refrigerant outlet of the compressor. The refrigerant outlet of the condenser is connected to the refrigerant inlets of the two enclosed evaporators via a throttling device. The refrigerant outlets of the two enclosed evaporators are both connected to the refrigerant inlet of the compressor.

[0025] Preferably, an enclosed evaporator is provided inside the upper air chamber. The enclosed evaporator has an open-end, non-closed annular structure. The refrigerant inlet of the condenser is connected to the refrigerant outlet of the compressor. The refrigerant outlet of the condenser is connected to the refrigerant inlet of the enclosed evaporator via a throttling device. The refrigerant outlet of the enclosed evaporator is connected to the refrigerant inlet of the compressor.

[0026] Preferably, a fan is horizontally arranged inside the upper air chamber, with the fan's intake port facing the exhaust port of the enclosed evaporator through the ventilation hole, and the fan's exhaust port facing the lower air chamber through the ventilation hole; or,

[0027] A fan is horizontally installed inside the lower air chamber, and the air intake of the fan faces the air outlet of the enclosed evaporator through the ventilation hole.

[0028] Compared with the prior art, the present invention has the following technical advantages:

[0029] 1. Improve the operating environment of electrical equipment

[0030] This invention reduces the temperature and humidity of the electrical room by cooling and dehumidifying, lowers the partial pressure of water vapor in the air, restores the insulation performance of the air and insulating medium in the electrical room, improves the cleanliness, dryness and insulation of the air, improves the operating environment of electrical equipment, and effectively prevents condensation on components such as terminals, contactors, coils, copper busbars, and thyristors of electrical equipment from causing arcing and short circuits, thereby improving the operational safety of electrical equipment such as transformers and switchgear.

[0031] 2. Eliminate blind spots in ventilation and dehumidification.

[0032] This invention utilizes a novel figure-eight airflow organization method, employing only a small number of evaporators, or even just one evaporator. The positive pressure airflow from the evaporator is ejected at high speed from multiple points along its 360° outer perimeter, plunging in multiple directions into the humid and stuffy spaces containing rows of cabinets. The air travels close to the ground between the cabinets, compressing the hot, humid air towards the center of the electrical room. It then rises through the gaps in the multiple high-speed airflow jets from the evaporator module to near the ceiling, before flowing back 360° to the dual evaporators. This novel airflow organization method fundamentally solves the common problems in electrical rooms, such as multiple rows of cabinets, poor air circulation, ventilation blind spots, and localized high temperature and humidity affecting the safety of electrical equipment.

[0033] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0035] Figure 1 Schematic diagram illustrating how airflow from a regular air conditioner is blocked in the electrical cabinet of the electrical room;

[0036] Figure 2 A schematic diagram showing the airflow for cooling and dehumidification only below the fan coil unit in a central air conditioning system.

[0037] Figure 3 This is a schematic diagram of the external structure of a high-position negative pressure air inlet and low-position positive pressure multi-point high-speed exhaust dehumidifier provided in preferred embodiment 1 of the present invention;

[0038] Figure 4 This is a schematic diagram of the internal structure of a high-position negative pressure air inlet and low-position positive pressure multi-point high-speed exhaust dehumidifier provided in preferred embodiment 1 of the present invention;

[0039] Figure 5 A top view of the internal structure of a high-position negative pressure air inlet and low-position positive pressure multi-point high-speed exhaust dehumidifier provided in preferred embodiment 1 of the present invention;

[0040] Figure 6 A schematic diagram of a refrigeration system for a high-position negative pressure air inlet and low-position positive pressure multi-point high-speed exhaust dehumidifier provided in preferred embodiment 1 of the present invention;

[0041] Figure 7A vertical cross-sectional view of the airflow path inside the casing of a high-position negative pressure air inlet and low-position positive pressure multi-point high-speed exhaust dehumidifier provided in preferred embodiment 1 of the present invention (fan placed horizontally);

[0042] Figure 8 A top view of the internal airflow path of a high-position negative pressure air inlet and low-position positive pressure multi-point high-speed exhaust dehumidifier provided in preferred embodiment 1 of the present invention;

[0043] Figure 9 A figure-eight closed loop diagram of the airflow path inside the casing and the electrical room space path of a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier provided in preferred embodiment 1 of the present invention;

[0044] Figure 10 A vertical cross-sectional view of the airflow path inside the casing of a high-position negative pressure air inlet and low-position positive pressure multi-point high-speed exhaust dehumidifier provided in preferred embodiment 1 of the present invention (fan placed vertically);

[0045] Figure 11 A top view of the internal airflow path of a high-position negative pressure air inlet and low-position positive pressure multi-point high-speed exhaust dehumidifier provided in preferred embodiment 2 of the present invention;

[0046] Figure 12 A schematic diagram of the refrigerant circulation inside the casing of a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier provided for preferred embodiment 2 of the present invention;

[0047] Figure 13 A schematic diagram of the refrigerant circulation of a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier (two enclosed evaporators) is provided for a preferred embodiment 3 of the present invention;

[0048] Figure 14 A schematic diagram of the airflow circulation of the indoor unit of a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier (two enclosed evaporators) is provided for a preferred embodiment 3 of the present invention.

[0049] Figure 15 A schematic diagram of the refrigerant circulation of a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier (with an enclosed evaporator) is provided for a preferred embodiment 3 of the present invention.

[0050] Figure 16 A schematic diagram of the airflow circulation of the indoor unit of a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier provided for preferred embodiment 3 of the present invention (an enclosed evaporator). Detailed Implementation

[0051] A high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier includes an indoor unit, which is ceiling-mounted and includes a casing. The upper circumference of the casing has several air intakes, and the lower circumference has several air exhausts. The casing contains a fan module and an evaporator module. During operation, humid air in the room enters the casing through the air intakes, is dehumidified by the evaporator module, and becomes low-temperature, low-humidity air. The low-humidity air is then drawn in by the fan module and discharged. The discharged positive-pressure low-humidity air is ejected at high speed through the several air exhausts. The ejected high-density, low-humidity air rushes outward at high speed, compressing the humid air in the room to converge towards the center and pass upward through the gaps in the high-speed low-humidity air jet. Then, it enters the casing through the several air intakes for the next dehumidification cycle.

[0052] This invention addresses the common problems in underground and semi-underground transformer rooms, electrical switchgear rooms, and other electrical rooms, such as multiple rows of cabinet-type structures, poor air circulation, numerous Joule heat sources for copper and aluminum wiring and circuit components like knife contactors, and high moisture evaporation from the floor and walls. It provides a dehumidifier with high-level negative pressure air intake and low-level positive pressure multi-point high-speed exhaust. The indoor unit of this dehumidifier adopts a ceiling-mounted design, installed in the center of the room or attached to the wall. During operation, driven by the fan module, the evaporator module receives air at high-level negative pressure, cools and dehumidifies, and then exhausts air at low-level positive pressure multi-point high-speed.

[0053] In this invention, the compressor, condenser, and throttling device of the dehumidifier are not limited to being installed indoors or outdoors. The following detailed description, using several specific embodiments, illustrates a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier. These embodiments are implemented based on the technical solution of this invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of this invention is not limited to the following embodiments. Those skilled in the art can modify and refine the invention without altering its spirit and content.

[0054] Example 1

[0055] Please refer to Figures 3 to 10 This embodiment provides a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier, which only includes an indoor unit 5 installed in the electrical room and has no outdoor unit. The indoor unit 5 includes a casing 51, and the casing 51 is divided horizontally into a plurality of air bags 511 and a middle partition cavity 512 by at least one first partition 513. The middle partition cavity 512 is located between the plurality of air bags 511, and a compressor 57 is installed in the middle partition cavity 512.

[0056] The housing 51 is divided into upper air bags 511 and lower air bags 5112 by a second partition 514. The first partition 513 has several ventilation holes, and the upper and lower air bags 5112 of each air bag 511 are connected by one of these ventilation holes. The upper air bag 5111 has an air intake 52, and the lower air bag 5112 has an exhaust vent 53. In this embodiment, the sidewall of the upper air bag 5111 exposed in the electrical room is made of a perforated plate, and the perforations on this plate serve as the air intake vents 52, facilitating the intake of large quantities of humid air. Each sidewall of the lower air bag 5112 exposed in the electrical room has a row of vents 53, facilitating the concentrated, high-speed ejection of low-humidity air.

[0057] The evaporator module includes a plurality of evaporators 54, and the fan module includes a plurality of fans 58. At least one evaporator 54 is provided in each upper air package 5111, and at least one fan 58 is provided in the upper air package 5111 or / and the lower air package 5112. The air intake or exhaust port of the fan 58 is arranged facing the corresponding ventilation hole, and the upper air package and the lower air package are connected through the fan 58.

[0058] In this embodiment, a condenser 56 is provided in the partition cavity 512. The condenser 56 is a shell-and-tube heat exchanger. The refrigerant inlet of the shell-and-tube heat exchanger is connected to the refrigerant outlet of the compressor 57. The refrigerant outlet of the shell-and-tube heat exchanger is connected to the refrigerant inlets of several evaporators 54 via a throttling device, or the refrigerant outlet of the shell-and-tube heat exchanger is connected to the refrigerant inlets of several evaporators 54 via several throttling devices 59. The refrigerant outlets of several evaporators 54 are all connected to the refrigerant inlet of the compressor 57. This embodiment does not limit the number of throttling devices 59. Several evaporators 54 are connected in parallel between the refrigerant inlet of the compressor 57 and the refrigerant outlet of the shell-and-tube heat exchanger. One throttling device 59 can be used between the refrigerant outlet of the shell-and-tube heat exchanger and the refrigerant inlets of the several evaporators 54; alternatively, multiple throttling devices 59 can be used, meaning the refrigerant outlet of the shell-and-tube heat exchanger is connected to the refrigerant inlets of the several evaporators 54 respectively through several throttling devices 59. The interfaces of the above devices are connected by pipelines.

[0059] Taking the example of a shell-and-tube heat exchanger whose refrigerant outlet is connected to the refrigerant inlets of several evaporators 54 via several throttling devices 59, a subcooling heat exchanger 55 may be provided between the refrigerant outlet of the shell-and-tube heat exchanger and the inlets of the several throttling devices 59. Both the subcooling heat exchanger 55 and the evaporator 54 are finned tube heat exchangers. The subcooling heat exchanger 55 is located within the upper air reservoir 5111 and is arranged side-by-side at the air outlet end of the evaporator 54. Furthermore, since both the condenser 56 and the evaporator 54 are finned tube heat exchangers, to simplify the manufacturing process, the subcooling heat exchanger 55 and the evaporator 54 are manufactured side-by-side and integrally, with the subcooling heat exchanger 55 located at the air outlet end of the evaporator 54. In this embodiment, the subcooling heat exchanger 55 is optional and can be set according to actual usage requirements. When a subcooling heat exchanger 55 is installed on the evaporator 54, the airflow paths of the subcooling heat exchanger 55 and the evaporator 54 are connected. During operation, driven by a fan, indoor humid air enters the evaporator under high negative pressure. After being cooled and dehumidified by the evaporator, the low-humidity air exits the evaporator and enters the subcooling heat exchanger 55. The subcooling heat exchanger 55 releases heat to subcool the low-humidity air, aiming to further increase the dehumidification effect. Please refer to [reference needed]. Figure 8 .

[0060] The water passage of the shell-and-tube heat exchanger is connected to the cooling tower. The shell-and-tube heat exchanger includes an inner tube and an outer tube. As to whether the inner tube carries cooling water or refrigerant, this embodiment does not limit this. The illustration shows that the inner tube carries cooling water, but this embodiment is not limited to this.

[0061] As one embodiment, a fan is horizontally arranged inside the upper air chamber 5111. The fan is located at the bottom of the upper air chamber 5111 and below the evaporator 54. In this embodiment, the fan is fixedly installed on the upper surface of the second partition 514. The exhaust port of the fan faces the lower air chamber 5112 through the ventilation hole, and the air intake port of the fan 58 faces the exhaust port of the evaporator 54.

[0062] As another embodiment, please refer to Figure 7 A fan 58 is horizontally arranged inside the lower air bag 5112. The fan 58 is located above the lower air bag 5112. In this embodiment, the fan 58 is fixedly installed on the lower end face of the second partition 514. The air intake of the fan 58 is connected to the upper air bag 5111 through the ventilation hole.

[0063] As a third embodiment, please refer to Figure 10 A fan 58 is vertically installed inside the upper air chamber 5111, and the fan 58 is fixedly installed on the inner side wall of the upper air chamber 5111. The air intake of the fan 58 is connected to the air outlet of the evaporator 54, and the air exhaust port 53 of the fan 58 is connected to the lower air chamber 5112 through the ventilation hole.

[0064] In this embodiment, the upper wind package 5111 and the upper wind package 5111 are connected by the fan 58.

[0065] This embodiment does not limit the number of air jackets. Preferably, one air jacket is provided on each side of the partition cavity 512, and two evaporators 54 and one fan 58 are symmetrically arranged in the two air jackets. The two evaporators 54 in the upper air jacket 5111 are symmetrically arranged. These four evaporators 54 are arranged in parallel.

[0066] This embodiment provides a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier, such as... Figure 6 As shown, during operation, the refrigerant liquid in the evaporator 54 of the refrigeration system absorbs the heat released by the cooling and dehumidification of the air in the electrical room and evaporates into low-pressure refrigerant gas. It is then compressed and pressurized by the compressor 57 and input into the shell-and-tube heat exchanger for condensation, releasing heat to the cooling water and carrying it to the cooling tower for discharge into the atmosphere. The refrigerant liquid in the shell-and-tube heat exchanger is then sent to the subcooling heat exchanger 55, where it further releases heat to the low-temperature air coming out of the evaporator 54 for subcooling. After that, the refrigerant liquid is depressurized by the throttling device 59 (such as a capillary tube) and re-enters the evaporator 54 to start a new round of refrigeration cycle.

[0067] During operation of this embodiment, the airflow in the electrical room, driven by the low-level centrifugal fan 58, circulates in a figure-eight pattern in the vertical plane: humid and hot air is drawn in by the low-level centrifugal fan 58, cooled and dehumidified by the evaporator 54 in the upper air chamber 5111, and then enters the lower air chamber 5112. There, it is pressurized by the centrifugal fan 58 into positive pressure air and then ejected at high speed along the outer periphery of the lower air chamber 5112 at multiple points in a 360° arc. The ejected high-density, low-temperature, and low-humidity air then flows outwards at high speed in multiple directions within the electrical room. The air is propelled into the humid and stuffy space where the rows of cabinets are located. It then sinks and travels close to the ground between the rows of cabinets, becoming hot and humid air. It then gathers in the center of the electrical room and rises to the vicinity of the ceiling through the gaps between the multiple high-speed air jets of the evaporator module. It then flows back to the evaporator 54 from the outer periphery of the dehumidifier in a 360° loop, completing an "8"-shaped circulation. After being cooled and dehumidified by the evaporator 54, the hot and humid air is drawn in again by the dual centrifugal fans 58 and pressurized into low-level, multi-point, high-speed air to enter the next cycle.

[0068] In this embodiment, a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier has an internal airflow path of casing 51 that combines with the electrical room space path to form an "8"-shaped closed-loop circulation. Figure 7 , Figure 8 , Figure 9 As shown.

[0069] This embodiment provides a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier. The heat recovered by the evaporator module is channeled into the water-cooled cooling tower system through the refrigerant circuit (such as the fluorine circuit) and discharged into the environment. This reduces the humidity, dust content and temperature of the air in the electrical room, reduces the partial pressure of water vapor in the air, restores the insulation performance of the air and the insulating medium, improves the cleanliness, dryness and insulation of the air, and improves the safety of electrical equipment such as transformers and switchgear.

[0070] Example 2

[0071] This embodiment shares the same dehumidification technology principle and technical approach as Embodiment 1. Both are designed to address the common characteristics of underground and semi-underground transformer rooms, electrical switchgear rooms, and other electrical rooms, such as multiple rows of cabinet-type structures, poor air circulation, numerous Joule heat sources from copper and aluminum wiring and circuit components like knife contactors, and high evaporation rates from the floor and walls. A ceiling-mounted design is employed, with the cabinet installed in the center of the electrical room or attached to the wall. During operation, driven by a centrifugal fan, the evaporator draws in air at a high negative pressure, cools, dehumidifies, and then reheats before exhausting air at a low positive pressure at multiple points at high speed. The multiple streams of low-humidity air ejected under positive pressure rush at high speed in multiple directions within the electrical room, entering the humid and stuffy spaces of the distant rows of cabinet-type structures. Traveling close to the ground between the rows of cabinets, the air becomes hot and humid before converging towards the center of the electrical room. It then rises through the gaps in the multiple high-speed air jets from the evaporator module to near the ceiling, before flowing back to the evaporator 54 from the periphery of the dehumidifier, completing an "8"-shaped circulation path.

[0072] The difference lies in the type and number of condensers. In this embodiment, please refer to... Figure 11 and Figure 12 Each of the upper air chambers 5111 is provided with at least one condenser 56'. Both the condenser 56' and the evaporator 54 are finned tube heat exchangers. In this embodiment, one condenser 56' is used in conjunction with one evaporator 54. The refrigerant outlet of the compressor 57 is connected to the refrigerant inlets of several condensers 56'. The refrigerant outlet of each condenser 56' is connected to the refrigerant inlet of the compressor 57 via a throttling device 59 and a corresponding evaporator 54. The condensers 56' and evaporators 54 are connected by airflow, and the condensers 56' are arranged side by side at the air outlet of the evaporator 54.

[0073] Since both the condenser 56' and the evaporator 54 are finned tube heat exchangers, in order to simplify the manufacturing process, the condenser 56' and the evaporator 54 are arranged side by side and as a single unit. The integrated design of the condenser 56' and the evaporator 54 provided in this embodiment has a simpler structure.

[0074] This embodiment provides a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier. During operation, the airflow in the electrical room, driven by the low-position centrifugal fan 58, circulates in an "8" shape in the vertical plane: humid and hot air is drawn in by the low-position centrifugal fan 58, cooled and dehumidified by the evaporator 54 in the high-position upper air chamber 5111, then flows through the condenser 56' and enters the low-position lower air chamber 5112. There, it is pressurized by the centrifugal fan 58 into positive pressure air and then ejected at high speed along the 360° outer periphery of the lower air chamber 5112. The ejected high-density air then flows through multiple points. Low-temperature, low-humidity air rushes outward at high speed in multiple directions within the electrical room, penetrating the humid and stuffy spaces of the rows of cabinets in the distance. It then sinks further between the rows of cabinets, traveling close to the ground, becoming hot and humid air before converging towards the center of the electrical room. From there, it rises to the vicinity of the ceiling through the gaps in the multiple high-speed air jets from the evaporator module, and then flows back 360° from the outer periphery of the dehumidifier to the evaporator 54, completing an "8"-shaped circulation path. After being cooled and dehumidified by the evaporator 54, the hot and humid air is drawn in again by the dual centrifugal fans 58 and pressurized, becoming low-level, multi-point, high-speed air outlets to enter the next cycle.

[0075] Example 3

[0076] This embodiment shares the same dehumidification technology principle and technical approach as Embodiment 1. Both are designed to address the common characteristics of underground and semi-underground transformer rooms, electrical switchgear rooms, and other electrical rooms, such as multiple rows of cabinet-type structures, poor air circulation, numerous Joule heat sources from copper and aluminum wiring and circuit components like knife contactors, and high evaporation rates from the floor and walls. A ceiling-mounted design is employed, with the cabinet installed in the center of the electrical room or attached to the wall. During operation, driven by a centrifugal fan, the evaporator draws in air at a high negative pressure, cools, dehumidifies, and then reheats before exhausting air at a low positive pressure at multiple points at high speed. The multiple streams of low-humidity air ejected under positive pressure then rapidly descend in multiple directions within the electrical room, penetrating the damp and stuffy spaces of the distant rows of cabinet-type structures. Traveling close to the ground between the cabinets, the air becomes hot and humid before converging towards the center of the electrical room. It then rises through the gaps in the multiple high-speed air jets from the evaporator module to near the ceiling, before flowing back to the evaporator from the periphery, completing an "8"-shaped circulation path.

[0077] The difference lies in the fact that this embodiment provides a high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier, including an indoor unit installed in the electrical room and an outdoor unit installed outside the electrical room. The indoor unit is equipped with an evaporator module and a fan module, and the outdoor unit is equipped with a compressor 57 and a condenser 56.” Specifically:

[0078] The indoor unit includes a casing, and the casing is divided into an upper air chamber and a lower air chamber by a second partition. A plurality of air intakes are provided on the circumference of the upper air chamber, and a plurality of air exhausts are provided on the circumference of the lower air chamber. The second partition is provided with ventilation holes, and the upper air chamber and the lower air chamber are connected through the ventilation holes.

[0079] The upper air chamber is equipped with at least one enclosed evaporator, meaning that the fins of this evaporator are not straight but curved. This embodiment does not limit the number or specific shape of the enclosed evaporators and can be set according to actual usage requirements.

[0080] As one example, please refer to Figure 13 and Figure 14 The upper air chamber contains two enclosed evaporators 54', which form an open-ended annular structure. This open annular shape is a geometric shape, and this embodiment does not impose specific limitations on this geometric shape; it can be a regular shape such as a square or circle, or it can be an irregular shape. In this embodiment, the enclosed evaporator 54' is U-shaped. The refrigerant inlet of the condenser 56" is connected to the refrigerant outlet of the compressor 57. The refrigerant outlet of the condenser 56" is connected to the refrigerant inlets of the two enclosed evaporators 54' via a throttling device 59. The refrigerant outlets of both enclosed evaporators 54' are connected to the refrigerant inlets of the compressor 57.

[0081] As another embodiment, please refer to Figure 15 and Figure 16 An enclosed evaporator 54” is provided inside the upper air chamber. This enclosed evaporator 54” has an open-ended, non-closed annular structure. This non-closed annular shape is a ring-shaped geometric figure. This embodiment does not impose specific limitations on this geometric figure; it can be a regular shape such as a square or a circle, or it can be an irregular shape. In this embodiment, the enclosed evaporator 54” is a square ring with one open end as an example. The refrigerant inlet of the condenser 56” is connected to the refrigerant outlet of the compressor 57. The refrigerant outlet of the condenser 56” is connected to the refrigerant inlet of this enclosed evaporator 54” via a throttling device 59. The refrigerant outlet of this enclosed evaporator 54” is connected to the refrigerant inlet of the compressor 57.

[0082] A fan 58 is horizontally installed inside the upper air chamber, located at the bottom of the upper air chamber and below the enclosed evaporator '. In this embodiment, the fan 58 is fixedly installed on the upper surface of the second partition. The air intake of the fan 58 faces the air outlet 53 of the enclosed evaporator, and the air exhaust 53 of the fan 58 faces the lower air chamber through the ventilation hole. Alternatively, a fan 58 is horizontally installed inside the lower air chamber, located above the lower air chamber and fixedly installed on the lower surface of the second partition. The air intake of the fan 58 faces the air outlet 53 of the enclosed evaporator 54' through the ventilation hole. That is, in this embodiment, the upper and lower air chambers are connected by the fan 58.

[0083] In this embodiment, the heat absorbed by the evaporator during cooling and dehumidification in the electrical room is sent to the external condenser 56” through the refrigerant circuit (such as the fluorine circuit) and discharged to the outdoor atmospheric environment.

Claims

1. A high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier, characterized in that, The system includes an indoor unit, which is ceiling-mounted and includes a casing. The upper circumference of the casing has several air intakes, and the lower circumference has several air exhausts. Inside the casing are a fan module and an evaporator module. During operation, humid indoor air enters the casing through the air intakes, is cooled and dehumidified by the evaporator module, and becomes low-humidity air. This low-humidity air is then drawn in by the fan module and discharged. The discharged positive-pressure low-humidity air is ejected at high speed through the several air exhausts. The ejected high-density low-humidity air rushes outwards at high speed, compressing the indoor humid air to converge towards the center and passing upwards through the gaps in the high-speed low-humidity air jet. It then re-enters the casing through the air intakes for the next dehumidification cycle. The evaporator module includes at least one evaporator, and the fan module includes at least one fan; The dehumidifier also includes at least one compressor, at least one condenser, and at least one throttling device, wherein the compressor and condenser are respectively located indoors or outdoors; The housing is divided into several air chambers and a middle partition chamber in a horizontal direction by at least one first partition. The middle partition chamber is located between the several air chambers and a compressor is installed in the middle partition chamber. The housing is divided into an upper air bag and a lower air bag by a second partition. The first partition is provided with a number of ventilation holes. The upper air bag and the lower air bag of each air bag are connected through a ventilation hole. The upper air bag is provided with the air intake and the lower air bag is provided with the air exhaust. The evaporator module includes a plurality of evaporators, the fan module includes a plurality of fans, each upper air package contains at least one evaporator, and each upper air package and / or lower air package contains at least one fan, with the air intake or exhaust port of the fan facing the ventilation hole.

2. The high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier as described in claim 1, characterized in that, A condenser, which is a shell-and-tube heat exchanger, is installed inside the partition cavity. The refrigerant inlet of the shell-and-tube heat exchanger is connected to the refrigerant outlet of the compressor. The refrigerant outlet of the shell-and-tube heat exchanger is connected to the refrigerant inlets of several evaporators via a throttling device, or the refrigerant outlet of the shell-and-tube heat exchanger is connected to the refrigerant inlets of several evaporators via several throttling devices. The refrigerant outlets of several evaporators are all connected to the refrigerant inlet of the compressor. The water channel of the shell-and-tube heat exchanger is connected to the cooling tower.

3. A high-position negative pressure air inlet and low-position positive pressure multi-point high-speed exhaust dehumidifier as described in claim 2, characterized in that, The refrigerant outlet of the shell-and-tube heat exchanger is connected to the refrigerant inlet of the evaporator via several throttling devices. A subcooling heat exchanger is also provided between the refrigerant outlet of the shell-and-tube heat exchanger and the inlet of the several throttling devices. Both the subcooling heat exchanger and the evaporator are finned tube heat exchangers. The subcooling heat exchanger is located inside the upper air chamber and is arranged in parallel at the air outlet of the evaporator.

4. A high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier as described in claim 1, characterized in that, A fan is horizontally installed inside the upper air chamber, with the fan's air intake facing the evaporator's air outlet and the fan's air exhaust facing the ventilation hole, and communicating with the lower air chamber through the ventilation hole; or, A fan is horizontally installed inside the lower air chamber, with the fan's air intake facing the ventilation hole and communicating with the upper air chamber through the ventilation hole; or, A fan is vertically installed inside the upper air chamber. The air intake of the fan faces the air outlet of the evaporator, and the air exhaust of the fan faces the ventilation hole and is connected to the lower air chamber through the ventilation hole.

5. A high-position negative pressure air inlet and low-position positive pressure multi-point high-speed exhaust dehumidifier as described in claim 1, characterized in that, Each of the upper air chambers is provided with at least one condenser. Both the condenser and the evaporator are finned tube heat exchangers. The condensers are arranged side by side at the air outlet of the evaporator. The refrigerant outlet of the compressor is connected to the refrigerant inlet of several of the condensers. The refrigerant outlet of each condenser is connected to the refrigerant inlet of the compressor via a throttling device and a corresponding evaporator.

6. A high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier as described in claim 5, characterized in that, The condenser and evaporator are integrated into one unit.

7. A high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier as described in any one of claims 1 to 6, characterized in that, An air bag is provided on each side of the central partition cavity. Two evaporators and a fan are symmetrically arranged in the two air bags, and the two evaporators in the upper air bag are symmetrically arranged.

8. A high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier as described in claim 1, characterized in that, The housing is divided into an upper air chamber and a lower air chamber by a second partition. Several air intakes are provided on the circumference of the upper air chamber, and several air exhausts are provided on the circumference of the lower air chamber. The second partition is provided with ventilation holes that connect the upper air chamber and the lower air chamber. The air intake or exhaust of the fan is positioned facing the ventilation holes. At least one enclosed evaporator is provided inside the upper air bag; The dehumidifier also includes an outdoor unit installed outdoors, which includes a compressor and a condenser.

9. A high-position negative pressure air intake and low-position positive pressure multi-point high-speed exhaust dehumidifier as described in claim 8, characterized in that, The upper air chamber is equipped with two enclosed evaporators, which form an open-ended annular structure. The refrigerant inlet of the condenser is connected to the refrigerant outlet of the compressor. The refrigerant outlet of the condenser is connected to the refrigerant inlets of the two enclosed evaporators via a throttling device. The refrigerant outlets of the two enclosed evaporators are both connected to the refrigerant inlet of the compressor.

10. A high-position negative pressure air inlet and low-position positive pressure multi-point high-speed exhaust dehumidifier as described in claim 8, characterized in that, An enclosed evaporator is installed inside the upper air chamber. The enclosed evaporator has an open-ended, non-closed annular structure. The refrigerant inlet of the condenser is connected to the refrigerant outlet of the compressor. The refrigerant outlet of the condenser is connected to the refrigerant inlet of the enclosed evaporator via a throttling device. The refrigerant outlet of the enclosed evaporator is connected to the refrigerant inlet of the compressor.

11. A high-position negative pressure air inlet and low-position positive pressure multi-point high-speed exhaust dehumidifier as described in claim 8, characterized in that, A fan is horizontally arranged inside the upper air chamber, with the fan's air intake facing the air outlet of the enclosed evaporator through the ventilation hole, and the fan's air exhaust facing the lower air chamber through the ventilation hole; or, a fan is horizontally arranged inside the lower air chamber, with the fan's air intake facing the air outlet of the enclosed evaporator through the ventilation hole.

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