Constant temperature and humidity cabinet

Abstract

The embodiment of the utility model provides a constant temperature and humidity cabinet which comprises a cabinet body, a cabinet door is installed on the cabinet body, a dehumidification and refrigeration module, a humidification module and a heating module are installed in an inner cavity of the cabinet body, and a temperature and humidity sensor is installed in the inner cavity of the cabinet body. The dehumidification and refrigeration module, the humidification module and the heating module start or stop working according to information detected by the temperature and humidity sensor. The dehumidification and refrigeration module comprises a dehumidification mechanism and a refrigeration mechanism, and the dehumidification mechanism and the refrigeration mechanism are matched with each other. The dehumidification and refrigeration module, the humidification module and the heating module are arranged, so that long-term temperature and humidity stability can be guaranteed, dehumidification or humidification work can be rapidly carried out when the humidity fluctuates greatly (for example, food is just put in or a door is opened), the temperature and humidity in the cabinet reach target values as soon as possible, and then the cabinet is in a constant-temperature and constant-humidity working state.

Description

Technical Field

[0001] The utility model belongs to the technical field of constant temperature and humidity, and in particular relates to a constant temperature and humidity cabinet. Background Art

[0002] Constant temperature and humidity cabinets are devices that automatically adjust the ambient temperature and humidity. They are widely used in libraries, museums, precision electronics, precision instruments, aerospace, power generation, electronic devices, medical equipment, automobile manufacturing, audio equipment storage, the pharmaceutical industry, and scientific research sites. They are particularly suitable for storing high-value, perishable, and easily oxidized items such as medicines, vaccines, and blood products.

[0003] Constant temperature and humidity cabinets have become indispensable equipment in many industries due to their temperature and humidity control, wide range of applications, high safety and environmental protection features.

[0004] Existing constant temperature and humidity cabinets maintain their internal temperature directly through the evaporator. During cooling, the evaporator's metal surface temperature is generally below 0°C, which is also below the cabinet's dew point. Therefore, while maintaining the cabinet's temperature, the humidity continuously decreases. Once the target temperature is reached, the compressor shuts down, causing the evaporator's metal surface temperature to rise rapidly again, leading to a rise in the humidity inside the cabinet. This cycle results in significant fluctuations in both humidity and temperature inside the cabinet.

[0005] The existing patent (CN216003768U) uses water to maintain the temperature of the chamber, with heat exchange occurring through a temperature control device connected to a water box via a water pipe. The evaporator is embedded in the water box. This system uses a temperature control device to exchange heat with the chamber temperature, but the temperature control device and the water box are connected via a water pipe, and the water temperature in the water box is controlled by the evaporator. This water box has a wide temperature control range, controlling both the chamber temperature and the dew point temperature to control the chamber humidity. The chamber temperature and dew point are different, making temperature and humidity control more difficult and unstable. Furthermore, the constant temperature change of the water box is detrimental to energy conservation. Utility Model Content

[0006] In view of the above problems existing in the prior art, an object of the embodiments of the present invention is to provide a constant temperature and humidity cabinet.

[0007] The technical solution adopted in the embodiment of the utility model is a constant temperature and humidity cabinet, comprising a cabinet body, a cabinet door installed on the cabinet body, a dehumidification and cooling module, a humidification module and a heating module installed in the inner cavity of the cabinet body, and a temperature and humidity sensor installed in the inner cavity of the cabinet body, wherein the dehumidification and cooling module, the humidification module and the heating module are respectively started or stopped according to the information detected by the temperature and humidity sensor;

[0008] The dehumidification and cooling module includes a dehumidification mechanism and a cooling mechanism, which work in conjunction with each other. The dehumidification and cooling module, humidification module, and heating module not only ensure long-term temperature and humidity stability, but also enable rapid dehumidification or humidification when humidity fluctuates significantly (such as when food is added or the door is opened), allowing the cabinet's temperature and humidity to quickly reach target values ​​before transitioning to a constant temperature and humidity state.

[0009] Furthermore, the dehumidification mechanism includes a first water box, an evaporator, and a first fan. The evaporator is placed in the first water box, and the top of the evaporator extends above the first water box. A first heater is provided on one side of the evaporator, and the first heater is located above the first water box. The first fan drives the air in the cabinet cavity to pass through the evaporator and the first heater in sequence. The evaporator is connected to an external refrigeration system to cool the evaporator. The bottom of the evaporator can be directly immersed in the first water box. The hot and humid air passes through the low-temperature evaporator and the water vapor in the air is liquefied to achieve the dehumidification function. The first heater heats the air cooled by the evaporator and sends it into the cabinet cavity for circulation to avoid affecting the overall temperature of the cabinet cavity. Most of the evaporator is in contact with the air, so that the evaporator directly participates in the dehumidification work, which helps to improve the dehumidification efficiency.

[0010] Furthermore, the refrigeration mechanism includes a second water box and a cold water drain. A first water circulation pipeline is constructed between the second water box and the cold water drain. A first water pump is installed in the first water circulation pipeline. A second fan is installed on one side of the cold water drain. The second fan drives air in the cabinet cavity through the cold water drain. The cold water drain is the cold water source in the cabinet cavity. The water stored in the second water box circulates through the cold water drain, which can maintain the temperature of the cold water drain at a stable temperature equal to the temperature of the water stored in the second water box, ensuring long-term temperature stability.

[0011] Furthermore, the heating module includes a second heater positioned below the cold water drain. The second fan drives air within the cabinet cavity through the cold water drain and then through the second heater. When the cabinet cavity temperature falls below a set value, the second heater directly heats the cabinet cavity air, achieving more efficient temperature control.

[0012] Furthermore, a second water circulation pipeline is constructed between the first and second water boxes, and a second water pump is installed in the second water circulation pipeline. Specifically, the water temperature in the first water box is lower than the water temperature in the second water box, and the water temperature in the second water box is lower than the air temperature in the cabinet cavity. Heat exchange occurs between the first and second water boxes, and the second water box exchanges heat with the cold water drain. This allows the air temperature in the cabinet cavity to be controlled through the cold water drain to approximate the water temperature in the second water box, ensuring long-term temperature stability.

[0013] Furthermore, the humidification module includes a water storage box, above which a third fan is installed. The third fan draws air above the water storage box into the cabinet's inner cavity. The water stored in the water storage box evaporates directly, and the third fan draws the relatively moist air above the water storage box into the cabinet's inner cavity, thereby achieving humidification. If humidification is not required, stopping the third fan reduces humidification efficiency and reduces the amount of moist air entering the cabinet's inner cavity.

[0014] Furthermore, a spray mechanism is installed in the water storage box, and the spray mechanism includes a water suction pump, and the water outlet end of the water suction pump is connected to a pipe to spray water above the liquid level of the water storage box. When the humidification amount is large, the spray mechanism can be turned on to speed up the humidification efficiency.

[0015] Furthermore, the humidification module further comprises a humidification box, which is arranged above the water storage box. When the humidification amount is small, the humidification work can be completed by the water storage box, the humidification box assembly and the third fan.

[0016] Furthermore, the dehumidification mechanism is installed at the top of the inner cavity of the cabinet, and the bottom of the first water box is fixedly connected with thermal insulation foam. The thermal insulation foam can reduce the influence of the temperature of the first water box on the air temperature in the inner cavity of the cabinet.

[0017] Furthermore, an air flow channel is provided on the thermal insulation foam, and the air flow channel guides the air below the thermal insulation foam to above the thermal insulation foam.

[0018] Compared with the existing technology, the constant temperature and humidity cabinet proposed by the present invention can not only ensure long-term temperature and humidity stability, but also quickly perform dehumidification or humidification when there is a large fluctuation in humidity (such as when food is just put in or the door is opened), so that the temperature and humidity in the cabinet can reach the target value as soon as possible, and then switch to a constant temperature and humidity working state.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention.

[0020] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and claims, serve to illustrate the embodiments of the utility model. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0023] Figure 2 This is a schematic diagram of the dehumidification and refrigeration module components of an embodiment of the present utility model.

[0024] Figure 3 It is an enlarged view of the upper part of an embodiment of the present utility model.

[0025] Figure 4 It is an enlarged view of the lower end portion of an embodiment of the present utility model. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0029] See Figures 1 to 4 The embodiment of the present utility model provides a constant temperature and humidity cabinet, comprising a cabinet body 1, a cabinet door being installed on the cabinet body 1, a dehumidification and cooling module, a humidification module and a heating module being installed in the inner cavity of the cabinet body 1, and a temperature and humidity sensor being installed in the inner cavity of the cabinet body 1, the dehumidification and cooling module, the humidification module and the heating module being started or stopped respectively according to information detected by the temperature and humidity sensor;

[0030] The dehumidification and cooling module includes a dehumidification mechanism and a cooling mechanism, which work in conjunction with each other. The dehumidification and cooling module, humidification module, and heating module not only ensure long-term temperature and humidity stability, but also enable rapid dehumidification or humidification when humidity fluctuates significantly (such as when food is added or the door is opened), allowing the cabinet's temperature and humidity to quickly reach target values ​​before transitioning to a constant temperature and humidity state.

[0031] The dehumidification mechanism includes a first water box 2, an evaporator 3, and a first fan 4. The evaporator 3 is placed within the first water box 2, with the top of the evaporator 3 extending above the first water box 2. A first heater 5 is provided on one side of the evaporator 3, located above the first water box 2. The first fan 4 drives air from the interior of the cabinet 1 through the evaporator 3 and the first heater 5 in sequence. The evaporator 3 is connected to an external refrigeration system to cool the evaporator 3. The bottom of the evaporator 3 is directly immersed in the first water box 2. The hot, humid air passes through the low-temperature evaporator 3, where the water vapor is liquefied, achieving the dehumidification function. The first water box 2 receives the liquefied water from the evaporator 3. The first heater 5 heats the air cooled by the evaporator 3 and circulates it into the interior of the cabinet 1, avoiding affecting the overall temperature of the cabinet 1. The evaporator 3 is mostly in contact with the air, allowing it to directly participate in the dehumidification process, which helps improve dehumidification efficiency.

[0032] The refrigeration mechanism includes a second water box 6 and a cold water drain 7. A first water circulation pipeline is constructed between the second water box 6 and the cold water drain 7. A first water pump 8 is installed on the first water circulation pipeline. A second fan 9 is installed on one side of the cold water drain 7. The second fan 9 drives the air in the interior of the cabinet 1 to pass through the cold water drain 7. The cold source of the interior of the cabinet 1 is the cold water drain 7. The water stored in the second water box 6 circulates through the cold water drain, which can maintain the temperature of the cold water drain at a stable temperature of the water stored in the second water box 6. Therefore, the air in the interior of the cabinet 1 is directly cooled without using the evaporator 3, avoiding sudden increases or decreases in the temperature of the air in the interior of the cabinet 1, thereby maintaining long-term temperature stability.

[0033] The heating module includes a second heater 10, which is located below the cold water drain 7. The second fan 9 drives the air in the cabinet 1 through the cold water drain 7 and then through the second heater 10. When the cabinet's internal temperature falls below a set value, the water circulation in the cold water drain 7 is shut down, and the second heater 10 directly heats the air in the cabinet 1, achieving faster temperature control efficiency.

[0034] A second water circulation pipeline is constructed between the first water box 2 and the second water box 6, and a second water pump 11 is installed in the second water circulation pipeline. During use, the water in the first water box 2 directly contacts the evaporator 3, resulting in the lowest temperature. Specifically, the water temperature in the first water box 2 is lower than the water temperature in the second water box 6, and the water temperature in the second water box 6 is lower than the air temperature within the cabinet 1. Heat exchange occurs between the first water box 2 and the second water box 6, and between the second water box 6 and the cold water drain 7. This allows the air temperature within the cabinet 1 to be controlled to approximate the temperature of the water in the second water box 6 through the cold water drain 7, avoiding sudden temperature fluctuations within the cabinet 1, thereby ensuring long-term temperature stability.

[0035] The humidification module includes a water storage box 12, above which a third fan 13 is disposed. This fan draws air above the water storage box 12 into the interior of the cabinet 1. The water stored in the water storage box 12 evaporates directly, and the third fan 13 draws the relatively moist air above the water storage box 12 into the interior of the cabinet 1, thereby achieving humidification. If humidification is not required, stopping the third fan 13 reduces humidification efficiency and reduces the amount of moist air entering the interior of the cabinet 1.

[0036] A spray mechanism 17 is installed in the water storage box 12. The spray mechanism 17 includes a water suction pump, and the water outlet of the water suction pump is connected to a pipe to spray water above the liquid level of the water storage box 12. When the humidification amount is large, the spray mechanism 17 can be turned on to speed up the humidification efficiency.

[0037] The humidification module also includes a humidification box 14, which is located above the water storage box 12. When the humidification amount is small, the humidification work can be completed by the water storage box 12, the humidification box assembly 14 and the third fan 13.

[0038] The dehumidification mechanism is mounted at the top of the cabinet 1. Insulating foam 15 is fixedly attached to the bottom of the first water box 2. Airflow channels 16 are defined in the insulating foam 15, directing air from below the insulating foam 15 to above it. The water in the first water box 2 has the lowest temperature when it directly contacts the evaporator 3. The insulating foam 15 reduces the impact of the first water box 2's temperature on the air temperature within the cabinet 1.

[0039] The above description is intended to be illustrative rather than restrictive, and those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure. Furthermore, the above examples (or one or more of them) may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. A constant temperature and humidity cabinet, comprising a cabinet body (1), wherein a cabinet door is installed on the cabinet body (1), characterized in that: The inner cavity of the cabinet (1) is equipped with a dehumidification and cooling module, a humidification module, and a heating module, and the inner cavity of the cabinet (1) is equipped with a temperature and humidity sensor, and the dehumidification and cooling module, the humidification module, and the heating module are respectively started or stopped according to information detected by the temperature and humidity sensor; The dehumidification and refrigeration module includes a dehumidification mechanism and a refrigeration mechanism, and the dehumidification mechanism and the refrigeration mechanism cooperate with each other.

2. A constant temperature and humidity cabinet according to claim 1, characterized in that: The dehumidification mechanism comprises a first water box (2), an evaporator (3) and a first fan (4); the evaporator (3) is placed in the first water box (2), and the top of the evaporator (3) extends above the first water box (2); a first heater (5) is provided on one side of the evaporator (3); the first heater (5) is located above the first water box (2); the first fan (4) drives the air in the inner cavity of the cabinet (1) to pass through the evaporator (3) and the first heater (5) in sequence; the evaporator (3) is connected to an external refrigeration system to cool the evaporator (3).

3. A constant temperature and humidity cabinet according to claim 2, characterized in that: The refrigeration mechanism comprises a second water box (6) and a cold water drain (7); a first water circulation pipeline is constructed between the second water box (6) and the cold water drain (7); a first water pump (8) is installed on the first water circulation pipeline; a second fan (9) is installed on one side of the cold water drain (7); the second fan (9) drives the air in the inner cavity of the cabinet (1) to pass through the cold water drain (7).

4. A constant temperature and humidity cabinet according to claim 3, characterized in that: The heating module includes a second heater (10), which is arranged below the cold water drain (7). The second fan (9) drives the air in the inner cavity of the cabinet (1) to pass through the cold water drain (7) and then pass through the second heater (10).

5. A constant temperature and humidity cabinet according to claim 3, characterized in that: A second water circulation pipeline is constructed between the first water box (2) and the second water box (6), and a second water pump (11) is installed on the second water circulation pipeline.

6. A constant temperature and humidity cabinet according to claim 1, characterized in that: The humidification module comprises a water storage box (12), and a third fan (13) is provided above the water storage box (12). The third fan (13) can draw air above the water storage box (12) into the inner cavity of the cabinet (1).

7. A constant temperature and humidity cabinet according to claim 6, characterized in that: A spray mechanism (17) is installed in the water storage box (12), and the spray mechanism (17) includes a water suction pump, and the water outlet end of the water suction pump is connected to a pipeline to spray water above the liquid level of the water storage box (12).

8. The constant temperature and humidity cabinet according to claim 6, characterized in that: The humidification module further comprises a humidification box (14), and the humidification box (14) is arranged above the water storage box (12).

9. The constant temperature and humidity cabinet according to claim 2, characterized in that: The dehumidification mechanism is installed on the top of the inner cavity of the cabinet (1), and the bottom of the first water box (2) is fixedly connected with thermal insulation foam (15).

10. The constant temperature and humidity cabinet according to claim 9, characterized in that: An air flow channel (16) is provided on the thermal insulation foam (15), and the air flow channel (16) guides the air below the thermal insulation foam (15) to the top of the thermal insulation foam (15).

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