A constant temperature and humidity anti-condensation container type water treatment equipment box

Abstract

The application discloses a container type water treatment equipment box body with constant temperature and humidity and anti-condensation, a sandwich heat preservation structure with a broken bridge heat insulation keel arranged inside is adopted for the box wall and the box door, and heat insulation strips are embedded between the metal framework and the inner and outer panels; the inner surface of the inclined heat preservation top plate is arranged in an inclined mode, a horizontal water guide groove is arranged at the inclined lower end edge of the top plate, and the water guide groove is connected with downcomers leading to the outside of the box at both ends; the box body is divided into a water treatment equipment installation area and an electrical control isolation area by heat insulation sealing plates, a normally closed isolation sealing door is arranged between the two areas, self-limiting temperature electric heat tracing bands are pasted and arranged on exposed metal fastening surfaces of the broken bridge heat insulation keel, inner walls of corner columns and inner walls around door frames, heat conductive aluminum foil adhesive tapes are attached to surfaces of the self-limiting temperature electric heat tracing bands, and heat insulation anticorrosive layers are arranged on the heat conductive aluminum foil adhesive tapes. The broken bridge isolation and the cold bridge active heat tracing cooperation make the air dew point temperature in the box body continuously lower than the lowest temperature of the inner surface, condensed water is guided out of the box along the slope, and the electrical elements are prevented from being damp.

Description

Technical Field

[0001] This invention belongs to the field of integrated water treatment equipment structure and environmental control technology, specifically relating to a containerized water treatment equipment box structure with temperature and humidity control and internal anti-cold bridge condensation function. Background Technology

[0002] Containerized water treatment equipment uses standard or customized containers as carriers, integrating water tanks, filter membrane modules, dosing pumps, water supply pumps, and electrical automation control cabinets within the container. It features modularity, short construction cycles, and ease of relocation, and is widely used in projects such as emergency water supply in the field, decentralized rural sewage treatment, industrial wastewater reuse, and landfill leachate treatment. This type of equipment is typically placed outdoors year-round, with the container directly exposed to the variable atmospheric environment, facing a significant condensation problem. Condensation is caused not only by insufficient insulation of the container but also by the surface temperature of the inner wall of the container (especially at the cold bridge points of the metal frame) being lower than the dew point temperature of the air inside the container, causing water vapor to precipitate on the surface.

[0003] The humidity conditions of water treatment enclosures differ from those of general equipment enclosures: First, the enclosure contains an open or semi-open water surface, water flow disturbance, and micro-leakage from pipes, resulting in a consistently high relative humidity inside the enclosure. Second, the large temperature difference between the inside and outside of the enclosure during the cold season in the north or the humid rainy season in the south makes it easy for metal connectors such as the outer frame, side beams, columns, and fastening bolts to form cold bridges, causing the local temperature of the inner wall to be significantly lower than the dew point of the air inside the enclosure. Third, the hot and humid air accumulates below the top plate under the action of thermal convection, forming a high-humidity air pocket at the top. Once the condensate on the top of the enclosure drips onto the surface of electrical control cabinets, motors, or instrument components, it can easily induce leakage tripping, short circuits, or equipment corrosion. Fourth, when staff open the door for inspection, cold air from outside rushes in and violently convections with the hot and humid air inside the enclosure, exacerbating the instantaneous condensation at the entrance and near the electrical area.

[0004] Existing improvement measures are mostly single-item approaches: for example, thickening the insulation layer (rubber-plastic cotton, rock wool, polyurethane, etc.) only solves the heat transfer problem and is not targeted enough for cold bridge condensation under temperature and humidity coupling conditions; simply setting up dehumidifiers or exhaust fans lacks dew point boundary linkage, and exhaust ventilation in low-temperature seasons may introduce more moisture.

[0005] Anti-condensation solutions already exist in the field of energy storage containers: CN120413863A discloses a method of installing a dehumidifier on the top of the energy storage container and a temperature control device on the outer wall, which prevents condensation on the inner wall by combining dehumidification and temperature control; CN119289584A discloses an anti-condensation control method for energy storage containers, which instructs the air conditioner to execute a preset operating mode based on the temperature and humidity data of the equipment compartment, and implements an anti-condensation strategy based on the opening and closing status of the doors, protecting the software control strategy rather than the container structure; CN220802155U discloses a post-processing structure for collecting and discharging condensate generated inside the energy storage container using a water collection tank, water pipes, and a water pump. All of the above solutions are designed for energy storage compartments with low moisture production, and dehumidification, temperature control, control strategies, and condensate collection are independent of each other, failing to provide structural countermeasures for cold bridging condensation, top condensate dripping, and cold air backflow problems in containers with high moisture production. Currently, there is no containerized water treatment equipment enclosure solution that integrates the anti-cold bridge structure of the enclosure, active heat tracing of cold bridges, hot air curtain isolation, dual humidity stratification monitoring and exhaust-humidification joint control into one unit. Summary of the Invention

[0006] The technical problem to be solved by this invention is: in containerized water treatment equipment under high humidity and large temperature difference environments, the inner surface temperature of the metal frame cold bridge part is lower than the dew point temperature of the air inside the box, and the condensation and dripping water on the cold bridge endangers electrical components; when the door is opened for inspection, the external cold and humid airflow flows back, and the inlet and outlet condenses instantly; the hot and humid air accumulates below the top plate, and the local hot and humid stagnation is out of control.

[0007] This invention provides a containerized water treatment equipment enclosure with constant temperature and humidity and anti-condensation properties. It is characterized by comprising an insulated base frame, external insulated side panels, an inclined insulated top panel, and an external insulated entrance / exit door. The external insulated side panels surround the insulated base frame, the inclined insulated top panel covers the top of the external insulated side panels, and the external insulated entrance / exit door is located on the external insulated side panels. The enclosure walls and doors all employ a sandwich insulation structure with internally installed thermally broken keel. Insulation strips are embedded between the metal frame of the thermally broken keel and the inner and outer panels. The inner surface of the inclined insulated top panel is inclined. A horizontally continuous water guide channel is fastened to the lower edge of the inclined end of the insulated top plate. Both ends of the water guide channel are connected to downpipes extending to the bottom of the insulated base frame and leading to the outside of the box. The box is divided into a water treatment equipment installation area and an electrical control isolation area by a heat-insulating sealing plate. A normally closed isolation sealing door is provided between the two areas. Self-regulating electric heating tape is adhered to the exposed metal fastening surface of the thermally broken heat-insulating keel, the inner wall of the corner columns of the box, and the inner wall around the frame of the external insulated entrance and exit door. The surface of the self-regulating electric heating tape is covered with thermally conductive aluminum foil tape, and the thermally conductive aluminum foil tape is covered with a heat-insulating and anti-corrosion layer.

[0008] Specifically, a down-blowing hot air curtain machine is installed above the door frame of the externally insulated entrance door, and a travel interlock switch is installed at the door frame of the externally insulated entrance door. The hot air curtain machine is electrically connected to the travel interlock switch via a contactor.

[0009] Specifically, the feature is that the box is equipped with an environmental monitoring sensor group, including a first top-layer humidity sensor located at the top of the water treatment equipment installation area and near the inclined insulated top plate, a second bottom-layer humidity sensor located on the side of the main moisture source in the water treatment equipment installation area, and a wall temperature sensor attached to the cold bridge part of the inner wall of the box; the wall temperature sensor is attached to the metal surface of the keel at the intersection of the corner column and the inclined insulated top plate.

[0010] Specifically, the top of the enclosure is equipped with an electric sealed exhaust fan on the leeward side, and the lower side of the enclosure is equipped with a one-way air intake vent with rainproof and air filtration functions. A humidification device is installed inside the enclosure.

[0011] Specifically, the electrical control isolation zone is equipped with a controller, which is electrically connected to the first top-level humidity sensor, the second bottom-level humidity sensor, the wall temperature sensor, the self-regulating heating cable, the humidification device, and the electric sealed exhaust fan. The controller is configured to: receive humidity signals from the first top-level humidity sensor and the second bottom-level humidity sensor and obtain the vertical humidity gradient; receive temperature and humidity signals inside the chamber and obtain the current air dew point temperature; compare the difference between the cold bridge wall temperature collected by the wall temperature sensor and the dew point temperature with a preset safety threshold; when the difference is less than the preset safety threshold, output a trigger signal to connect the power supply circuit of the self-regulating heating cable; when the value of the first top-level humidity sensor exceeds the high limit or the vertical humidity gradient exceeds the balance threshold, output a trigger signal to start the electric sealed exhaust fan and introduce filtered dry fresh air through the one-way air supply port; and output a trigger signal to interlock and start the humidification device under dry conditions.

[0012] Specifically, the inclined insulated top plate has a unidirectional tilt angle of 3° to 5° relative to the horizontal plane.

[0013] Specifically, the first top-layer humidity sensor is located approximately 150mm directly below the inclined insulation top plate, and the second bottom-layer humidity sensor is located approximately 500mm above the main moisture source.

[0014] Specifically, the electric closed exhaust fan is an electric closed exhaust fan with self-closing sealing blades, the one-way air intake is equipped with a dust-blocking filter, and the humidification device is a high-frequency ultrasonic atomizing nozzle.

[0015] Specifically, the insulation strip embedded in the thermally broken keel is a polyamide insulation strip; the isolation and sealing door is an isolation and sealing door with a sealing ring.

[0016] Specifically, the water treatment equipment installation area is equipped with water treatment equipment, and the main source of moisture includes the water pump and / or water tank of the water treatment equipment.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) The thermal break insulation keel embeds insulation strips between the metal frame and the inner and outer panels, cuts off the continuous heat conduction path of the metal parts, and weakens the heat transfer of cold bridges; the self-limiting electric heating tape is precisely laid in the cold bridge area and automatically put into operation according to the difference between the wall temperature and the dew point, so that the lowest temperature of the inner wall is kept higher than the dew point of the air in the box, cutting off the conditions for water vapor to turn into condensation from the thermodynamic source; the inclined top plate, water guide groove and downpipe form a redundant defense line, so that even if there is abnormal condensation, it will not drip into the electrical area, avoiding equipment immersion and short circuit.

[0018] (2) The dual humidity sensors at the top and bottom are linked, which can detect the fluctuation of humidity production in the first time and accurately capture the moisture retention at the top, eliminating the blind spot of control caused by airflow stratification of a single sensor; the exhaust ventilation on demand reduces the heat and energy loss caused by excessive ventilation.

[0019] (3) The hot air curtain is interlocked with the door opening stroke, which effectively reduces the instantaneous large-area condensation caused by the cold air pouring out when the door is opened, and the temperature and humidity fluctuation inside the box is small under the inspection conditions.

[0020] (4) The water treatment area and electrical compartment are set up in combination with sealed isolation doors and sealing structures to prevent high humidity and corrosive gases from migrating to the electrical control unit, thereby improving the safety of all-weather outdoor operation.

[0021] (5) When the humidity inside the box is too low in winter or dry areas, the interlocking humidification device will be activated to avoid static electricity accumulation and cracking of the seals, and to achieve two-way control of temperature and humidity. Attached Figure Description

[0022] Figure 1 The three-dimensional structure of the containerized water treatment equipment housing for constant temperature and humidity and anti-condensation; Figure 2 A cross-sectional schematic diagram of the containerized water treatment equipment with constant temperature and humidity and anti-condensation properties; Figure 3This is a block diagram of the electrical control logic for dual humidity sensors and anti-condensation. Reference numerals: 1-Insulated base frame, 2-External insulation side panel, 3-Insulated inclined top panel, 4-External insulation entrance / exit door, 5-Broken bridge thermal insulation keel, 6-Water guide channel, 7-Downflow pipe, 8-Self-regulating electric heating tape, 9-Hot air curtain machine, 10-Limit interlock switch, 11-First top layer humidity sensor, 12-Second bottom layer humidity sensor, 13-Wall temperature sensor, 14-Water treatment equipment, 15-Electrically controlled isolation zone, 16-Isolation sealed door, 17-Electric sealed exhaust fan, 18-One-way air supply vent, 19-Hydraulic device, 20-Controller. Detailed Implementation

[0023] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0024] The following detailed description of the implementation method of the present invention is in conjunction with the accompanying drawings. The description is only a partial embodiment and not all embodiments. For clarity, representations and descriptions unrelated to the present invention are omitted in the drawings and description.

[0025] To provide a clearer understanding of the technical features, objectives, and beneficial effects of this invention, the following detailed description of the technical solution is provided. Obviously, the described embodiments are only a portion of the embodiments of this invention, not all of them, and should not be construed as limiting the scope of implementation of this invention. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the protection scope of this invention.

[0026] The following is a complete implementation method with reference to the accompanying drawings. The plate thickness, slope, sensor installation height, control threshold, etc., are all exemplary values ​​used to illustrate the implementation process. The specific design values ​​need to be verified according to the thermal calculations of the target application environment.

[0027] like Figure 1 and Figure 2 As shown, the container is assembled from an insulated base frame 1, external insulated side panels 2, a sloping insulated top panel 3, and an external insulated entrance / exit door 4. The internal support frame of each wall panel uses a thermally broken keel 5 with embedded polyamide insulation strips. The sloping insulated top panel 3 has a unidirectional tilt angle of 3° to 5° relative to the horizontal plane. A horizontally continuous water guide channel 6 is installed at the bottom end of the slope, close to the inner side wall of the container. The two ends of the water guide channel 6 are connected to the downpipe 7 that runs through the base frame, which guides the collected condensate to the ground outside the container.

[0028] The interior of the enclosure is divided into a water treatment equipment installation area and an electrical control isolation area 15 by vertically installed heat-insulating and sealing plates. Water treatment equipment 14 is arranged in the water treatment equipment installation area. An isolation and sealing door 16 with a sealing ring is installed between the two areas and is normally kept closed.

[0029] Self-regulating electric heating cables 8 are adhered to all exposed metal fastening surfaces of the thermally broken keel 5 inside the enclosure, the inner walls of the four corner columns of the enclosure, and around the perimeter of the four externally insulated entrance doors 4. Thermally conductive aluminum foil tape is attached to the surface of the heating cables 8, followed by an insulation and anti-corrosion layer to ensure effective heat transfer to the frame and prevent moisture absorption. A down-blowing hot air curtain 9 is suspended above the entrance doors 4. The hot air curtain 9 is electrically connected to a travel interlock switch 10 installed on the side edge of the door frame via a contactor.

[0030] Within the water treatment equipment installation area, a first top-level humidity sensor 11 is suspended approximately 150mm directly below the inclined insulated roof panel 3; a second bottom-level humidity sensor 12 is fixedly installed approximately 500mm above the main moisture sources, such as the main water pumps and water tanks of the water treatment equipment 14; a wall temperature sensor 13 is attached to the lowest wall temperature cold bridge extreme point determined by thermal calculations of the enclosure structure—that is, the metal surface of the keel at the intersection of the corner column and the roof panel (representative height approximately 1500mm from the insulation base). An electric sealed exhaust fan 17 with self-closing sealing blades is installed on the leeward side of the upper side wall of the enclosure, and a one-way air intake vent 18 with a dust filter is set at the lower side; a humidification device 19, such as a high-frequency ultrasonic atomizing nozzle, is also installed inside the enclosure. A PLC controller 20 is installed in the electrical control isolation area 15, and each sensor and actuator is connected to the control unit. The air supply vents in the electrical area independently organize micro-positive pressure air supply.

[0031] Dew point anti-condensation control during operation: The PLC calculates the dew point temperature Td in real time based on the dry-bulb temperature and relative humidity inside the chamber using the Magnus empirical formula, and reads the cold bridge wall temperature Tw measured by the wall temperature sensor 13. When Tw-Td≤2.0℃, the power supply circuit of the corresponding self-limiting heating cable 8 is automatically connected to raise the temperature; the circuit is disconnected after the wall temperature rises back to Tw-Td≥4.0℃, and hysteresis control avoids frequent start-stop.

[0032] Exhaust and dehumidification control during operation: When the reading of the first top-level humidity sensor 11 is higher than the high limit (e.g., 75%RH), or the difference between it and the second bottom-level humidity sensor 12 exceeds the balance threshold (e.g., 15%RH), the electric sealed exhaust fan 17 is turned on to extract the high-humidity air from the top, and the one-way air intake vent 18 passively draws in the outside air filtered by the filter under negative pressure; exhaust stops after the humidity drops back to the set range.

[0033] Humidification control during operation: In winter, when the temperature is low and the humidity inside the chamber is below the lower limit (e.g., 40%RH), the exhaust fan is turned off and the humidification device 19 is interlocked to start humidification and maintain the humidity inside the chamber below the lower limit.

[0034] Windproof barrier of the vestibule during operation control: When the inspection personnel push open the outer insulation door 4, the travel interlock switch 10 closes, and the power supply of the hot air curtain machine 9 is connected through the contactor, which sprays hot air downward to block the cold air in the doorway; the switch disconnects after a delay of about 30 seconds after the door is closed.

[0035] The operation control process includes zone isolation and micro-positive pressure: the isolation sealing door 16 between the two zones is normally closed and only opened during maintenance; the air conditioning supply of the electrical control isolation zone 15 is independently organized to maintain a relatively dry micro-positive pressure environment in the electrical compartment.

[0036] Alternative methods: The self-limiting electric heating cable can be replaced with a carbon fiber heating film pre-embedded at the connection between the side panel and the top panel, or a circulating hot water capillary heat exchanger. The thermally conductive aluminum foil tape on the outer surface of the heating cable can be selected according to the location. The unidirectional slope structure of the inclined insulated top panel can be replaced with a herringbone bidirectional slope structure, with two water guide channels symmetrically arranged on the inner edge of the two side panels. The hot air curtain can be replaced with an externally mounted double-door airlock buffer room, or an infrared-sensored automatic closing transparent double-layer insulated soft curtain. The dual humidity sensor configuration can be supplemented with a third median humidity sensor, or a wireless temperature and humidity sensor array can be used. The wall temperature sensor can be infrared temperature measurement. The ultrasonic atomizing humidification device can be replaced with a wet film humidifier or an electrode humidifier. The electric sealed exhaust fan can be replaced with a combination of electric air valve and variable speed fan. The filter level of the air supply port can be selected according to the dust conditions on site. The dew point temperature calculation in the controller can use an equivalent thermal algorithm other than the Magnus empirical formula (such as table lookup interpolation), which will not affect the control structure based on the wall temperature-dew point difference.

[0037] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A containerized water treatment equipment housing with constant temperature and humidity and anti-condensation, characterized in that, The enclosure includes an insulated base frame (1), an external insulated side panel (2), an inclined insulated top panel (3), and an external insulated entrance / exit door (4). The external insulated side panel (2) surrounds the insulated base frame (1), the inclined insulated top panel (3) covers the top of the external insulated side panel (2), and the external insulated entrance / exit door (4) is located on the external insulated side panel (2). The enclosure walls and doors are all made of a sandwich insulation structure with internally installed thermally broken keel (5). The metal frame of the thermally broken keel (5) is embedded with insulation strips between the inner and outer panels. The inner surface of the inclined insulated top panel (3) is inclined, and the lower edge of the inclined insulated top panel (3) is inclined. A horizontally penetrating water guide channel (6) is fastened at the bottom. Both ends of the water guide channel (6) are connected to downpipes (7) extending to the bottom of the insulation base (1) and leading to the outside of the box. The box is divided into a water treatment equipment installation area and an electrical control isolation area (15) by a heat insulation sealing plate. A normally closed isolation sealing door (16) is provided between the two areas. Self-regulating electric heating tape (8) is pasted on the exposed metal fastening surface of the thermal break insulation keel (5), the inner wall of the corner column of the box, and the inner wall around the door frame of the external insulation entrance (4). The surface of the self-regulating electric heating tape (8) is covered with thermally conductive aluminum foil tape, and the thermally conductive aluminum foil tape is covered with a heat insulation and anti-corrosion layer.

2. The containerized water treatment equipment housing with constant temperature and humidity and anti-condensation as described in claim 1, characterized in that, The externally insulated entrance door (4) is equipped with a down-blowing hot air curtain machine (9) above the door frame, and a travel interlock switch (10) is provided at the door frame of the externally insulated entrance door (4). The hot air curtain machine (9) is electrically connected to the travel interlock switch (10) via a contactor.

3. The containerized water treatment equipment housing with constant temperature and humidity and anti-condensation as described in claim 2, characterized in that, The box is equipped with an environmental monitoring sensor group, including a first top humidity sensor (11) located at the top of the water treatment equipment installation area and close to the inclined insulation top plate (3), a second bottom humidity sensor (12) located on the side of the main moisture source in the water treatment equipment installation area, and a wall temperature sensor (13) attached to the cold bridge part of the inner wall of the box; the wall temperature sensor (13) is attached to the metal surface of the keel at the intersection of the corner column and the inclined insulation top plate (3).

4. The containerized water treatment equipment housing with constant temperature and humidity and anti-condensation as described in claim 3, characterized in that, An electric sealed exhaust fan (17) is provided on the leeward side of the top of the box, and a one-way air supply port (18) with rainproof and air filtration functions is provided on the lower side of the box. A humidification device (19) is provided inside the box.

5. The containerized water treatment equipment housing with constant temperature and humidity and anti-condensation as described in claim 4, characterized in that, The electrical control isolation zone (15) is equipped with a controller (20), which is electrically connected to the first top-level humidity sensor (11), the second bottom-level humidity sensor (12), the wall temperature sensor (13), the self-regulating heating cable (8), the humidification device (19), and the electric sealed exhaust fan (17). The controller (20) is configured to: receive the humidity signals from the first top-level humidity sensor (11) and the second bottom-level humidity sensor (12) and obtain the vertical humidity gradient accordingly; receive the temperature and humidity signals inside the box and obtain the current humidity gradient accordingly. The air dew point temperature is compared with the difference between the cold bridge wall temperature collected by the wall temperature sensor (13) and the dew point temperature and a preset safety threshold. When the difference is less than the preset safety threshold, a trigger signal is output to connect the power supply circuit of the self-limiting electric heating tape (8). When the value of the first top humidity sensor (11) exceeds the high limit or the vertical humidity gradient exceeds the balance threshold, a trigger signal is output to start the electric sealed exhaust fan (17) and filter dry fresh air is supplied through the one-way air supply port (18). Under dry conditions, a trigger signal is output to interlock and start the humidification device (19).

6. The containerized water treatment equipment housing with constant temperature and humidity and anti-condensation as described in claim 1, characterized in that, The inclined insulated top plate (3) has a unidirectional tilt angle of 3° to 5° relative to the horizontal plane.

7. The containerized water treatment equipment housing with constant temperature and humidity and anti-condensation as described in claim 3, characterized in that, The first top-level humidity sensor (11) is located about 150 mm directly below the inclined heat-insulating top plate (3), and the second bottom-level humidity sensor (12) is located about 500 mm above the outside of the main moisture source.

8. The containerized water treatment equipment housing with constant temperature and humidity and anti-condensation as described in claim 4, characterized in that, The electric closed exhaust fan (17) is an electric closed exhaust fan with self-closing sealing blades. The one-way air supply port (18) is equipped with a dust-blocking filter screen. The humidification device (19) is a high-frequency ultrasonic atomizing nozzle.

9. The containerized water treatment equipment housing with constant temperature and humidity and anti-condensation as described in claim 1, characterized in that, The insulation strip embedded in the thermally broken keel (5) is a polyamide insulation strip; the isolation and sealing door (16) is an isolation and sealing door with a sealing ring.

10. The containerized water treatment equipment housing with constant temperature and humidity and anti-condensation as described in claim 7, characterized in that, The water treatment equipment installation area is equipped with water treatment equipment (14), and the main source of moisture includes the water pump and / or water tank of the water treatment equipment (14).

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