Dehumidification device

Abstract

Disclosed is a dehumidification device, comprising: a processing fan configured to convey an airflow to be processed, such that the airflow to be processed enters a processing area of the dehumidification device in a first direction; the rotating wheel assembly is configured to adsorb water vapor in to-be-treated airflow so as to dehumidify the to-be-treated airflow; the motor is configured to rotate the rotating wheel assembly at a uniform speed; the regeneration fan is configured to convey airflow used for regeneration, so that the airflow used for regeneration enters a regeneration area of the dehumidification device in a second direction opposite to the first direction, and the airflow used for regeneration is used for drying the rotating wheel assembly; the heater is arranged between the regeneration fan and the rotating wheel assembly, and the heater is configured to heat airflow used for regeneration; and the pressure difference switch is arranged between the outlet of the regeneration fan and the heater.

Description

Technical Field

[0001] The present disclosure relates to a dehumidification device, and more particularly, to a dehumidification device capable of preventing a heater therein from overheating. Background Art

[0002] Rotary dehumidifiers utilize rotary dehumidification technology and are widely used in fields and industries with strict humidity requirements, such as military, pharmaceutical, archive management, electronics, shipbuilding, chemical fiber, and food production. The key component of a rotary dehumidifier is the dehumidification rotor, which consists of numerous tiny air passages and is made of a composite material that includes a desiccant. As the dehumidified air passes through the dehumidification zone, the moisture in the air is absorbed by the desiccant on the dehumidification rotor.

[0003] Next, the regeneration fan transports the airflow for regeneration into the regeneration area of the dehumidification device. The airflow for regeneration is heated by the heater to high-temperature regeneration air and passes through the rotor, so that the moisture in the desiccant on the dehumidification rotor is desorbed, the desiccant on the dehumidification rotor is regenerated, and the dehumidification rotor regains the ability to absorb moisture, thereby continuously providing dry air to users.

[0004] The air intake of a rotary dehumidifier is delivered by a fan. The fan's motor rotates the impeller, converting mechanical energy into airflow. When the fan is running, the high-speed airflow passes through the impeller, generating dynamic pressure. Dynamic pressure is the pressure energy converted from the kinetic energy of the airflow. It gives the airflow a certain pressure, which can propel the airflow through the pipe or equipment.

[0005] Currently, the fan's air volume is usually adjusted by changing the impeller angle. However, when the internal space of the equipment is limited, it is difficult to use different impellers. A frequency converter is required to control the motor speed. In order to prevent the frequency converter from malfunctioning and causing the heater to overheat, the power supply to the heater in the dehumidification device needs to be cut off in time.

[0006] Therefore, it is desirable to provide a dehumidification device capable of preventing a heater therein from overheating. Summary of the Invention

[0007] A brief overview of the present disclosure is provided below to provide a basic understanding of certain aspects of the present disclosure. It should be understood that this overview is not an exhaustive overview of the present disclosure. It is not intended to identify key or important aspects of the present disclosure, nor is it intended to limit the scope of the present disclosure. Its purpose is simply to present certain concepts in a simplified form as a prelude to the more detailed description discussed later.

[0008] In view of the above problems, an object of the present disclosure is to provide a dehumidification device capable of preventing a heater therein from being overheated.

[0009] According to one aspect of the present disclosure, a dehumidification device is provided, which includes: a processing fan, which is configured to convey an airflow to be treated so that the airflow to be treated enters a processing area of the dehumidification device in a first direction; a rotor assembly, which is configured to adsorb water vapor in the airflow to be treated to dehumidify the airflow to be treated; a motor, which is configured to rotate the rotor assembly at a constant speed; a regeneration fan, which is configured to convey an airflow for regeneration so that the airflow for regeneration enters a regeneration area of the dehumidification device in a second direction opposite to the first direction, and the airflow for regeneration is used to dry the rotor assembly; a heater, which is arranged between the regeneration fan and the rotor assembly, and the heater is configured to heat the airflow for regeneration; and a pressure difference switch, which is arranged between the outlet of the regeneration fan and the heater.

[0010] According to an embodiment of the present disclosure, the pressure differential switch is configured to: sense the pressure of the airflow used for regeneration; determine whether the difference between the sensed pressure and the full pressure of the regeneration blower exceeds a predetermined pressure differential threshold; and disconnect the power supply to the heater when the sensed pressure is lower than the full pressure of the regeneration blower and equal to or exceeds the predetermined pressure differential threshold.

[0011] According to an embodiment of the present disclosure, the differential pressure switch is configured to control contactor contacts via a contactor coil to disconnect power supply to the heater.

[0012] According to an embodiment of the present disclosure, the dehumidification device further includes a first temperature control switch, which is disposed between the heater and the wheel assembly and at a position close to the heater.

[0013] According to an embodiment of the present disclosure, the first temperature control switch is configured to: sense the temperature of the heater; determine whether the sensed temperature exceeds a predetermined temperature threshold; and disconnect the power supply to the heater when the sensed temperature exceeds the predetermined temperature threshold.

[0014] According to an embodiment of the present disclosure, the first temperature control switch controls the contactor contacts via the contactor coil to disconnect the power supply to the heater.

[0015] According to an embodiment of the present disclosure, the dehumidification device further includes a frequency converter, which is used to control the rotation speed of the regeneration fan.

[0016] According to an embodiment of the present disclosure, the predetermined pressure difference threshold is 5% of the full pressure of the regenerative blower.

[0017] According to an embodiment of the present disclosure, the operating frequency of the dehumidification device is 50 Hz.

[0018] According to an embodiment of the present disclosure, the dehumidification device further includes a second temperature control switch, and either the first temperature control switch or the second temperature control switch controls the circuit breaker via a circuit breaker release to disconnect the power supply to the heater.

[0019] Other aspects of the embodiments of the present disclosure are given in the following description, wherein the detailed description is used to fully disclose the preferred embodiments of the embodiments of the present disclosure without imposing limitations thereon. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to further illustrate the above and other advantages and features of the present disclosure, the following is a further detailed description of specific embodiments of the present disclosure in conjunction with the accompanying drawings. The drawings, together with the detailed description below, are included in this specification and form a part of this specification. Elements with the same function and structure are represented by the same reference numerals. It should be understood that these drawings only depict typical examples of the present disclosure and should not be regarded as limiting the scope of the present disclosure. In the drawings:

[0021] Figure 1 Schematically illustrates a functional configuration example of a dehumidification device according to an embodiment of the present disclosure;

[0022] Figure 2 Schematically illustrates a portion of a circuit of a dehumidification device according to an embodiment of the present disclosure;

[0023] Figure 3 schematically illustrates a portion of a circuit of a dehumidification device according to an embodiment of the present disclosure; and

[0024] Figure 4 A partial circuit of a dehumidification device according to an embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0025] Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings. For the sake of clarity and conciseness, not all features of an actual implementation are described in this specification. However, it should be understood that in the process of developing any such actual implementation, many implementation-specific decisions may be made to achieve the developer's specific goals, and these decisions may vary from implementation to implementation.

[0026] It should also be noted here that in order to avoid obscuring the present disclosure due to unnecessary details, only the device structure closely related to the solution according to the present disclosure is shown in the drawings, while other details that are not closely related to the present disclosure are omitted.

[0027] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0028] The following combination Figure 1 A dehumidification device according to an embodiment of the present disclosure will be described. Figure 1 A functional configuration example of the dehumidification device 100 according to an embodiment of the present disclosure is schematically shown.

[0029] like Figure 1 As shown, the dehumidification device 100 according to an embodiment of the present disclosure may include a process fan 102 , a wheel assembly 104 , a motor 106 , a regeneration fan 108 , a heater 110 , and a differential pressure switch 112 .

[0030] The process fan 102 may be configured to convey the airflow to be processed so that the airflow to be processed enters the process area of the dehumidification device 100 in a first direction.

[0031] The wheel assembly 104 may be configured to absorb water vapor in the airflow to be processed to dehumidify the airflow to be processed.

[0032] The motor 106 may be configured to rotate the wheel assembly 104 at a constant speed.

[0033] The regeneration fan 108 may be configured to deliver airflow for regeneration such that the airflow for regeneration enters the regeneration zone of the dehumidification device 100 in a second direction opposite to the first direction, and the airflow for regeneration is used to dry the wheel assembly 104 .

[0034] The heater 110 may be disposed between the regeneration blower 108 and the rotor assembly 104 . The heater 110 may be configured to heat the airflow for regeneration.

[0035] The pressure differential switch 112 is disposed between the regeneration blower 108 and the heater 110, near the outlet of the regeneration blower 108. The pressure differential switch 112 may be configured to: sense the pressure of the airflow for regeneration; determine whether the difference between the sensed pressure and the full pressure of the regeneration blower 108 exceeds a predetermined pressure differential threshold; and disconnect the power supply to the heater 110 when the sensed pressure is lower than the full pressure of the regeneration blower 108 by an amount equal to or exceeding the predetermined pressure differential threshold.

[0036] It should be recognized that although Figure 1 Not shown in the figure, the dehumidification device 100 may further include a frequency converter, and the frequency converter is used to control the speed of the regeneration fan.

[0037] According to an embodiment of the present disclosure, the operating frequency of the dehumidification device may be 50 Hz. It should be appreciated that the operating frequency of the dehumidification device of the present disclosure is not limited thereto.

[0038] According to one embodiment of the present disclosure, a differential pressure switch in a dehumidification device may be used to prevent the heater from overheating. Figure 2Schematically shows a portion of the circuit of the dehumidification device 100 according to an embodiment of the present disclosure. It should be appreciated that for the sake of clarity, Figure 2 Some details are omitted and only the content related to using the differential pressure switch in the dehumidification device to prevent the heater from overheating is focused on.

[0039] like Figure 2 As shown, the contactor coil 206 controls the closing and opening of the contactor contact 208 through electromagnetic action, and the pressure difference switch 204 senses the pressure of the air flow for regeneration and determines whether the difference between the sensed pressure and the full pressure of the regeneration fan exceeds a predetermined pressure difference threshold.

[0040] When the pressure differential switch 204 determines that the difference between the sensed pressure and the full pressure of the regeneration fan is less than the predetermined pressure differential threshold, the reversing valve of the pressure differential switch remains in the P1 position, the contactor coil 206 is energized, and the contactor contact 208 is closed due to the electromagnetic action between the contactor coil 206 and the contactor contact 208 to further provide power to the heater 202.

[0041] When the pressure differential switch 204 determines that the difference between the sensed pressure and the full pressure of the regeneration fan is greater than or equal to the predetermined pressure differential threshold, the reversing valve of the pressure differential switch switches from the P1 position to the P2 position, thereby de-energizing the contactor coil 206, and the contactor contact 208 is disconnected due to the electromagnetic action between it and the contactor coil 206, thereby disconnecting the power supply to the heater 202.

[0042] According to an embodiment of the present disclosure, the predetermined pressure difference threshold is 5% of the full pressure of the regenerative blower. It should be appreciated that the predetermined pressure difference threshold of the present disclosure is not limited thereto.

[0043] According to another embodiment of the present disclosure, the dehumidifier may further include a temperature control switch to prevent the heater from overheating. According to this embodiment of the present disclosure, the temperature control switch is disposed between the dehumidifier's heater and the rotor assembly, near the heater. The first temperature control switch is configured to: sense the temperature of the dehumidifier's heater; determine whether the sensed temperature exceeds a predetermined temperature threshold; and, if the sensed temperature exceeds the predetermined temperature threshold, disconnect power to the dehumidifier's heater.

[0044] Figure 3 The figure schematically shows a part of the circuit of a dehumidification device according to another embodiment of the present disclosure.

[0045] like Figure 3 As shown, the dehumidification device also includes a temperature control switch 210, which is configured to sense the temperature of the heater 202 of the dehumidification device and determine whether the sensed temperature exceeds a predetermined temperature threshold (ie, determine whether it is higher than the predetermined temperature threshold).

[0046] The reversing valve of the first temperature control switch 210 is initially at the C1 position. When the first temperature control switch 210 determines that the sensed temperature is lower than or equal to the predetermined temperature threshold, the reversing valve of the first temperature control switch remains at the C1 position.

[0047] When the first temperature control switch 210 determines that the sensed temperature is higher than or equal to the predetermined temperature threshold, the reversing valve of the first temperature control switch 210 switches from position C1 to position C2, the relay 212 is de-energized, and the relay contact 214 is disconnected due to the electromagnetic action between the relay contact 214 and the relay 212, thereby de-energizing the contactor coil 206. Furthermore, the contactor contact 208 is disconnected due to the electromagnetic action between the contactor contact 208 and the contactor coil 206, thereby disconnecting the power supply to the heater 202.

[0048] It should be recognized that Figure 3 Operations and troubleshooting related to differential pressure switches, contactor coils, and contactor contacts in Figure 2 The same is true in , so I will not repeat them here.

[0049] According to another embodiment of the present disclosure, the dehumidification device may further include more than one temperature control switch to prevent the heater from overheating. Figure 4 The figure schematically shows a part of the circuit of a dehumidification device according to another embodiment of the present disclosure.

[0050] like Figure 4 As shown, a temperature control switch 209 and a temperature control switch 211 may be provided between the heater of the dehumidification device and the wheel assembly, near the heater of the dehumidification device.

[0051] According to an embodiment of the present disclosure, the temperature threshold of the temperature control switch 211 can be set to be higher than the temperature threshold of the temperature control switch 209. In the initial case, the reversing valve of the temperature control switch 211 is in position C11, and the reversing valve of the temperature control switch 209 is in position C21. The temperature control switch 209 and the temperature control switch 211 respectively sense the temperature and determine whether the sensed temperature exceeds their respective temperature thresholds.

[0052] Since the temperature threshold of the temperature control switch 211 is set to be higher than the temperature threshold of the temperature control switch 209, when the temperature of the heater rises, the sensed temperature of the heater first exceeds the temperature threshold of the temperature control switch 209. At this time, the reversing valve of the temperature control switch 209 switches from position C21 to C22, thereby energizing the circuit breaker release 213. Furthermore, the circuit breaker contact 216 is opened due to the electromagnetic interaction between the circuit breaker contact 216 and the circuit breaker release 213, thereby disconnecting the power supply to the heater 202.

[0053] It should be appreciated that providing more than one temperature control switch can provide redundant protection. For example, temperature control switch 209 may malfunction and prevent the reversing valve from properly switching to position C22 when the heater's temperature exceeds its threshold. In this case, temperature control switch 211 can be controlled to properly disconnect the heater's power supply, thereby preventing the heater from overheating. This will be described in detail below.

[0054] In some cases, the temperature control switch 209 may malfunction, and the reversing valve of the temperature control switch 209 may not properly switch to position C22 when the temperature of the heater exceeds its temperature threshold. In this case, according to the redundant protection scheme of the present disclosure, when the temperature control switch 211 determines that the temperature it senses exceeds the temperature threshold of the temperature control switch 211, the reversing valve of the temperature control switch 211 switches from position C11 to position C12, thereby de-energizing the relay 212 and energizing the circuit breaker release 213. Furthermore, the de-energization of the relay 212 causes the relay contact 214 to open due to the electromagnetic interaction between the relay 214 and the relay 212, and the energization of the circuit breaker release 213 causes the circuit breaker contact 216 to open due to the electromagnetic interaction between the circuit breaker release 213 and the circuit breaker release 213, thereby disconnecting the power supply to the heater and preventing the heater from overheating.

[0055] Although the present disclosure has been disclosed above through the description of specific embodiments of the present disclosure, it should be understood that those skilled in the art may design various modifications (including, where feasible, the combination or replacement of features between the various embodiments), improvements, or equivalents of the present disclosure within the spirit and scope of the appended claims. Such modifications, improvements, or equivalents should also be considered to be included within the scope of protection of the present disclosure.

[0056] It should be emphasized that the term "include / comprises" when used herein refers to the existence of features, elements, steps or components, but does not exclude the existence or addition of one or more other features, elements, steps or components.

[0057] Through the above description, the embodiments of the present disclosure provide the following technical solutions, but are not limited thereto.

[0058] Solution 1. A dehumidification device comprising:

[0059] a process fan configured to convey the airflow to be processed so that the airflow to be processed enters the processing area of the dehumidification device in a first direction;

[0060] a rotor assembly configured to absorb water vapor in the air flow to be treated to dehumidify the air flow to be treated;

[0061] a motor configured to rotate the wheel assembly at a constant speed;

[0062] a regeneration fan configured to convey an airflow for regeneration so that the airflow for regeneration enters the regeneration zone of the dehumidification device in a second direction opposite to the first direction, and the airflow for regeneration is used to dry the rotor assembly;

[0063] a heater disposed between the regeneration blower and the rotor assembly, the heater being configured to heat an air flow for regeneration; and

[0064] A differential pressure switch is provided between the outlet of the regeneration blower and the heater.

[0065] Solution 2. The dehumidification device according to Solution 1, wherein the pressure differential switch is configured as:

[0066] sensing the pressure of the air flow for regeneration;

[0067] determining whether a difference between the sensed pressure and the total pressure of the regeneration blower exceeds a predetermined pressure difference threshold; and

[0068] When the sensed pressure is lower than the full pressure of the regeneration blower by an amount equal to or exceeding a predetermined pressure differential threshold, power supply to the heater is disconnected.

[0069] Solution 3. The dehumidification device according to Solution 2, wherein the differential pressure switch is configured to control the contactor contacts via the contactor coil to disconnect the power supply to the heater.

[0070] Solution 4. The dehumidification device according to Solution 3, wherein the dehumidification device further comprises a first temperature control switch, and the first temperature control switch is arranged between the heater and the wheel assembly and at a position close to the heater.

[0071] Solution 5. The dehumidification device according to Solution 4, wherein the first temperature control switch is configured to:

[0072] sensing the temperature of the heater;

[0073] determining whether the sensed temperature exceeds a predetermined temperature threshold; and

[0074] When the sensed temperature exceeds a predetermined temperature threshold, power supply to the heater is disconnected.

[0075] Solution 6. The dehumidification device according to Solution 5, wherein the first temperature control switch controls the contactor contacts via the contactor coil to disconnect the power supply to the heater.

[0076] Solution 7. According to the dehumidification device described in Solution 1, the dehumidification device also includes a frequency converter, which is used to control the speed of the regeneration fan.

[0077] Solution 8. The dehumidification device according to Solution 1, wherein the predetermined pressure difference threshold is 5% of the full pressure of the regeneration fan.

[0078] Solution 9. The dehumidification device according to Solution 1, wherein the operating frequency of the dehumidification device is 50 Hz.

[0079] Solution 10. A dehumidification device according to any one of Solutions 4-5, wherein the dehumidification device further comprises a second temperature control switch, and either the first temperature control switch or the second temperature control switch controls the circuit breaker through a circuit breaker release to disconnect the power supply to the heater.

[0080] In addition, the methods of the various embodiments of the present disclosure are not limited to being executed in the chronological order described in the specification or shown in the drawings, and may also be executed in other chronological orders, in parallel, or independently. Therefore, the execution order of the methods described in this specification does not limit the technical scope of the present disclosure.

Claims

1. A dehumidification device, characterized in that: The dehumidification device comprises: a processing fan configured to convey an airflow to be processed so that the airflow to be processed enters a processing area of the dehumidification device in a first direction; a rotor assembly configured to adsorb water vapor in the airflow to be treated to dehumidify the airflow to be treated; a motor configured to rotate the wheel assembly at a constant speed; a regeneration fan configured to convey an airflow for regeneration so that the airflow for regeneration enters the regeneration zone of the dehumidification device in a second direction opposite to the first direction, and the airflow for regeneration is used to dry the rotor assembly; a heater disposed between the regeneration blower and the rotor assembly, the heater being configured to heat the airflow for regeneration; and A differential pressure switch is provided between the outlet of the regeneration blower and the heater.

2. The dehumidification device according to claim 1, characterized in that The differential pressure switch is configured as: sensing the pressure of the air flow for regeneration; determining whether a difference between the sensed pressure and the total pressure of the regeneration blower exceeds a predetermined pressure difference threshold; as well as When the sensed pressure is lower than the full pressure of the regeneration blower and is equal to or exceeds the predetermined pressure difference threshold, the power supply to the heater is disconnected.

3. The dehumidification device according to claim 2, characterized in that: The differential pressure switch is configured to control a contactor contact through a contactor coil to disconnect power supply to the heater.

4. The dehumidification device according to claim 3, characterized in that The dehumidification device further includes a first temperature control switch, which is disposed between the heater and the wheel assembly and close to the heater.

5. The dehumidification device according to claim 4, characterized in that: The first temperature control switch is configured as: sensing a temperature of the heater; determining whether the sensed temperature exceeds a predetermined temperature threshold; and When the sensed temperature exceeds the predetermined temperature threshold, power supply to the heater is disconnected.

6. The dehumidification device according to claim 5, characterized in that: The first temperature control switch controls the contactor contacts via the contactor coil to cut off power supply to the heater.

7. The dehumidification device according to claim 1, characterized in that The dehumidification device further includes a frequency converter, which is used to control the rotation speed of the regeneration fan.

8. The dehumidification device according to claim 2, characterized in that: The predetermined pressure difference threshold is 5% of the full pressure of the regeneration fan.

9. The dehumidification device according to claim 1, characterized in that: The operating frequency of the dehumidification device is 50 Hz.

10. The dehumidification device according to any one of claims 4 to 5, characterized in that: The dehumidification device further includes a second temperature control switch, and either the first temperature control switch or the second temperature control switch controls a circuit breaker via a circuit breaker release to disconnect power supply to the heater.

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