A constant temperature and humidity test chamber

Abstract

The present invention discloses a constant temperature and humidity test chamber. The technical solution thereof mainly comprises a chamber body with a hot chamber and a cold chamber, wherein a storage box is slidably arranged between the hot chamber and the cold chamber. By changing the chamber in which the storage box is located, the ambient temperature of the material can be changed, thereby realizing a hot and cold shock test. At the same time, by changing the structure of the storage box and the setting of the program, a constant temperature and humidity test can also be realized. Thus, multiple functions can be integrated into one device, allowing a device to be used for multiple purposes, thereby increasing the scope of use of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental temperature test chambers, and in particular to a constant temperature and humidity test chamber. Background Art

[0002] Constant temperature and humidity test chambers, also known as constant temperature and humidity test machines, constant temperature and humidity test chambers, and programmable humidity and heat cycling test chambers, are primarily used to test the performance of materials in various environments and to test their resistance to heat, cold, dryness, and humidity. They are suitable for quality control of electronics, electrical appliances, mobile phones, communications, instrumentation, vehicles, plastics, metals, food, chemicals, building materials, medical, and aerospace products. A constant temperature and humidity test chamber consists of two components: temperature control (heating and cooling) and humidification. A rotating fan mounted on the top of the chamber circulates air and balances the temperature and humidity within the chamber. Data collected by the built-in temperature and humidity sensors is transmitted to the temperature and humidity controller (a microprocessor) for processing and editing, issuing temperature and humidity control commands. This is achieved through the combined efforts of the air heating unit, condenser, and heating and evaporation unit within the water tank.

[0003] The temperature rise and fall in the cavity of the existing constant temperature and humidity test chamber is generally linear, and the temperature rise and fall rate is slow. It can only be used for high-temperature tests, low-temperature tests, and humidity tests, and cannot achieve temperature shock tests that require a fast temperature rise and fall rate. As a result, when the factory needs to perform temperature shock tests on products, it is necessary to open an additional constant temperature and humidity test chamber to achieve a rapid transition between low and high temperature environments of the product; or to purchase an additional hot and cold shock test chamber to conduct separate tests, which increases the product testing cost and the space occupied by the equipment, making it inconvenient to use. In addition, the existing hot and cold shock test chambers have a very fast temperature change rate in the cavity, which is not a linear increase or decrease. Therefore, when moisture is introduced, the moisture will condense and frost or directly dry out during the temperature change process, resulting in the ambient humidity being unable to rise. Therefore, the hot and cold shock test chambers on the market cannot complete humidity tests.

[0004] Therefore, if the market needs to customize equipment that can complete the functions of a constant temperature and humidity test chamber and a cold and hot shock test chamber, it is necessary to install two sets of cooling and heating equipment on the equipment to independently achieve a constant temperature and humidity test environment or a cold and hot shock test environment, which greatly increases production costs. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a constant temperature and humidity test chamber, which can integrate the functions of a constant temperature and humidity test chamber and a cold and hot shock test chamber through a set of refrigeration and heating equipment, thereby realizing the multi-purpose use of one device.

[0006] To achieve the above-mentioned object, the present invention adopts a technical solution: a constant temperature and humidity test chamber, comprising a chamber body and a control assembly, characterized in that a baffle with a through groove is provided in the chamber body, the baffle body dividing the chamber body into a hot chamber and a cold chamber; a heating assembly is provided in the hot chamber, and a cooling assembly is provided in the cold chamber;

[0007] The box body is also slidably connected to a sealable storage box, which can move back and forth between the cold chamber and the hot chamber; it also includes a temperature-regulating box connected to the cold chamber and the hot chamber. When the storage box is located in the middle of the box body and is sealed, the temperature-regulating box and the storage box are connected to each other via a connecting pipe; the temperature-regulating box is also connected to a humidifying component; it also includes temperature sensors respectively arranged in the cold chamber, the hot chamber, and the storage box and connected to the control component; the storage box is also provided with a humidity sensor; it also includes an exhaust pipe connecting the box body with the outside world and the storage box with the outside world.

[0008] The present invention is further configured such that the storage box includes a pair of insulation plates slidably connected to the box body and matched with the through slot, the pair of insulation plates are respectively located in the hot chamber and the cold chamber and a material rack is detachably connected between the two; the pair of insulation plates are connected to a power source and an insulation sleeve with a "C"-shaped cross-section is detachably connected between the insulation plates and the through slot; and further includes a sealing cover detachably arranged between the pair of insulation plates, the sealing cover and the insulation sleeve being magnetically connected for covering the opening of the storage box.

[0009] The present invention is further configured such that the temperature regulating box is provided with air inlet holes respectively connected to the cold chamber and the hot chamber and provided with air inlet fans, and a pair of the air inlet holes are provided with gas flow regulating valves.

[0010] The present invention is further configured such that a cabinet door is provided on the box body; an observation window is provided on the cabinet door; the control component includes a control panel provided on the box body, and the control panel is electrically connected to a heating component, a cooling component, a temperature sensor, a water pump, an intake fan and a gas flow regulating valve.

[0011] The present invention is further configured such that a guide rail is provided inside the box body, a guide block matching the guide rail is provided on one side of the insulation board, and the guide block is connected to a power source.

[0012] The present invention is further configured such that conical chamfers are provided on both sides of the through groove, a sealing surface matching the conical chamfer is provided on the edge of the insulation plate, and a sealing gasket is affixed to the sealing surface; the box body and the baffle are integrally arranged, and a vacuum cavity that is interconnected is provided between the two, and the vacuum cavity is connected to a vacuum pump.

[0013] The present invention is further configured such that a pair of the heat insulation plates are hollow and air pipes are provided on opposite sides, the baffle is provided with air holes that are plugged into the air pipes, and a one-way valve assembly is provided between the air holes and the air pipes.

[0014] The present invention is further configured such that the one-way valve assembly includes a mounting plate fixedly arranged in the trachea, a sealing ring elastically connected to the trachea is arranged on the edge of the mounting plate; it also includes a tubular pressure rod fixedly arranged in the air hole and abutting the sealing ring, a sealing plate elastically connected to the air hole is arranged in the middle of the pressure rod; and magnets that attract each other are arranged between the sealing plate and the mounting plate.

[0015] The present invention is further configured such that both the cold chamber and the hot chamber are connected to an air intake box connected to the outside world, and a drying component is provided in the air intake box. The drying component includes a drying box detachably arranged in the air intake box, and color-changing silica gel is provided in the drying box; and further includes a humidity sensor A arranged below the drying box, and the humidity sensor A is electrically connected to the control panel.

[0016] The present invention is further configured such that the thermal insulation sleeve includes a rubber sleeve, the rubber sleeve is provided with two sides and the space between the rubber sleeves is filled with thermal insulation material; a card strip is provided on one side surface of the thermal insulation board, and a card plate that can be engaged with the card strip is provided on the thermal insulation sleeve, and the thermal insulation sleeve also includes a pressure strip elastically provided on the thermal insulation board and pressed tightly against the edge of the thermal insulation sleeve.

[0017] In summary, the beneficial effects of the present invention are:

[0018] Compared with existing equipment, this application has achieved the integration of the functions of a constant temperature and humidity test chamber and a hot and cold shock test chamber through structural improvements, so that the equipment can realize temperature and humidity experiments, high and low temperature experiments, hot and cold shock tests, etc., which increases the scope of use of the equipment, enables the multi-purpose use of a device, and saves the space occupied by the equipment; and the hot and cold shock test and constant temperature and humidity test are realized by a set of refrigeration and heating equipment, which is convenient for users to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural diagram of this embodiment.

[0020] Figure 2 It is a cross-sectional schematic diagram of this embodiment.

[0021] Figure 3 yes Figure 2 Enlarged view of the one-way valve assembly.

[0022] Figure 4 It is a side sectional view of this embodiment.

[0023] Figure 5 It is a rear view of this embodiment.

[0024] Figure 6 This is a state diagram of the constant temperature and humidity test of this embodiment.

[0025] Figure 7 It is a partial cross-sectional view of the storage box of this embodiment.

[0026] Figure 8 It is a three-dimensional structural diagram of the thermal insulation board of this embodiment.

[0027] Figure 9 This is a connection block diagram of this embodiment.

[0028] Figure 1: 1-box; 2-hot chamber; 3-cold chamber; 4-heating assembly; 5-refrigeration assembly; 6-baffle; 7-through slot; 8-temperature control box; 81-fan; 82-air inlet; 83-gas flow control valve; 91-insulation board; 92-material rack; 93-power source; 94-insulation sleeve; 941-rubber sleeve; 942-insulation material; 96-sealing cover; 10-connecting pipe; 11-water tank; 111-water pump; 112-humidifier; 12-temperature sensor Device; 101-cabinet door; 102-control panel; 13-guide rail; 14-guide block; 15-vacuum chamber; 16-vacuum pump; 17-conical chamfer; 18-sealing surface; 19-trachea; 20-air hole; 21-one-way valve assembly; 211-mounting plate; 212-sealing ring; 213-pressure rod; 214-sealing plate; 22-card strip; 23-card plate; 24-air inlet box; 25-drying assembly; 26-drying box; 27-humidity sensor; 28-pressing strip. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1-9 As shown, this embodiment discloses a constant temperature and humidity test chamber, comprising a double-layered chamber 1, wherein the chamber 1 is formed with a hot chamber 2 and a cold chamber 3 through a baffle 6. Figure 5 As shown, a heating assembly 4 corresponding to the hot cavity 2 is provided at the back of the box 1. The heating assembly 4 includes a heater and a fan (both of which are prior art and not shown in the figure). The heater can heat the air in the hot cavity to reach the temperature set by the control panel. A refrigeration assembly 5 is also provided at the back of the box 1. The refrigeration assembly 5 has the same structural principle as that disclosed in patent application number (CN102974406A), including an evaporator, a compressor, an expansion valve and a condenser (not shown in the figure). The refrigeration assembly can make the cold cavity reach the set temperature.

[0031] like Figure 2 、 6As shown, a through slot 7 is provided between the baffles 6, and a through slot 7 is provided on the box body 1, which can slide between the two cavities. The storage box includes insulation plates 91 respectively arranged in the cold chamber 3 and the hot chamber 2. The insulation plates 91 can slide through a power source. The power source 93 is a servo motor. The output shaft of the servo motor is fixedly connected to a screw threadedly connected to the guide block 14. The positions of the two insulation plates 91 can be independently controlled by rotating the screw; a slide groove is provided on the opposite side of the two insulation plates 91, and the material rack 92 is arranged between the two insulation plates 91 through the slide groove.

[0032] When the staff needs to conduct a hot and cold impact test, the user operates the heating component 4 and the cooling component 5 through the control panel to adjust the temperature in the two cavities, wherein the control panel is a PLC controller that can control the equipment; a temperature sensor 12 is provided in the two cavities, and the temperature in the two cavities can be fed back to the control panel in real time through the temperature sensor 12, so that the control panel 102 can detect and adjust the temperature of the two cavities in real time, so that the two cavities can reach the preset temperature; in this process, the user can control the two insulation plates to move to the right or left, so that one of the insulation plates is in close contact with the baffle, thereby achieving The closure of the through slot ensures the independence of the two cavities and prevents the air in the two cavities from circulating together. After that, the user can place the product to be tested on the rack 92. There can be multiple racks 92, so that multiple materials can be placed. At this time, the rack 92 is located in one of the cavities. At this time, after the staff closes the cabinet door, the materials will be in a cold or high temperature environment. After a period of time, the control component drives the two power sources to start, driving the two insulation plates 91 to move to the other cavity, and the materials on the rack 92 will also move to the other cavity with the two insulation plates 91, realizing an instantaneous transition from high temperature to low temperature or low temperature to high temperature environment, completing the hot and cold hedge test.

[0033] like Figure 4-6 As shown, a thermostat 8 is further provided at the rear of the box 1 and located between the two cavities. The thermostat 8 is provided with air inlet holes 82 respectively located in the two cavities. The air inlet holes 82 are provided with a fan 81 that guides the cavity temperature to the thermostat. A gas flow regulating valve 83 is also provided in the air inlet hole 82. The gas flow regulating valve is an electric flow regulating valve that can be connected to the control panel to regulate and control the gas flow from the cavity into the thermostat. The hot and cold air entering the thermostat 8 through the air inlet holes 82 can be mixed in the thermostat 8, thereby achieving a stable output temperature. The air in the thermostat 8 is then sent to the storage box through a connecting pipe to change the temperature in the storage box.

[0034] At the same time, the storage box is located between the two cavities, and the two insulation plates 91 are sealed and covered on the top, bottom and back by an insulation sleeve 94; at the same time, a sealing cover 96 is provided in the direction of the opening formed by the insulation sleeve and the insulation plate 91, and the sealing cover 96 is plug-fitted to the insulation plate 91 on both sides, and the insulation sleeve 94 is provided with a soft magnet facing the opening direction, which can attract the sealing cover 96 to ensure the sealing effect; thereby achieving the mutual independence between the interior of the storage box and the two cavities.

[0035] When a constant temperature and humidity test is required, the user first controls the two insulation plates 91 to move away from the baffle 6 via a servo motor. The user then connects an insulation sleeve 94, one end of which is fixedly connected to the inner side of the baffle, to the insulation plate. The insulation sleeve 94 comprises two layers of rubber sleeves 941 made of silicone fluororubber capable of withstanding temperatures ranging from -50°C to 200°C. Between the two layers of rubber sleeves 941 lies insulation material 942, made of aerogel felt. Both materials are flexible and can fold and deform. After the insulation sleeve 94 is connected to the insulation plate 91, the user controls the storage box to move toward a cavity, exposing the opening to the outside world. The user then places items in the storage box and seals the opening with a sealing cover 96. The storage box is then controlled to move toward the center of the box. During this process, the baffle presses the sealing cover 96 inward, improving the sealing effect. The sealing cover 96 is also provided with a transparent viewing window through which the user can observe the items inside.

[0036] Then the heating component and the refrigeration component are started at the same time to realize the temperature control of the two cavities; then the control component controls the fans on the two thermostatic boxes 8 to rotate, thereby guiding the air in the two cavities into the thermostatic boxes for mixing, and then the mixed air will enter the storage box along the connecting pipe to realize the temperature regulation of the air in the storage box; and a temperature sensor is provided in the storage box, and the temperature sensor will send the air temperature in the storage box to the control component. After receiving the temperature, the control component can control the gas flow control valves 83 at the two air inlet holes, thereby controlling the ratio of cold air and hot air entering the thermostatic box, realizing the regulation of the output air temperature, ensuring the constant temperature in the storage box, and realizing the constant temperature of the storage box;

[0037] The thermostat box 8 is also connected to a humidifying assembly, which includes a water tank 11 located in the box body 1, a water pump 111 is provided in the water tank 11, and a humidifier 112 is connected between the thermostat box 8; when it is necessary to control the humidity in the storage box, the control assembly controls the water pump and the humidifier 112 to start, so that the water in the water tank humidifies the air in the thermostat box 8 through the humidifier, thereby controlling the humidity in the storage box; a humidity sensor is provided in the storage box, and the humidity in the storage box can be detected by the humidity sensor, so that the control assembly can better control and adjust the humidity to achieve the simulation of a constant humidity environment.

[0038] When the user needs high and low temperature environment tests, the user can disassemble the material plate and control the two insulation plates to fit tightly against the through slots to achieve relative independence of the two cavities. The user can then adjust the temperature of the two cavities separately, so that high temperature and low temperature environment tests can be carried out simultaneously, improving the efficiency of the test.

[0039] By combining the air in the hot and cold chambers, the temperature of the air in the storage box can be quickly increased or decreased by increasing the amount of hot or cold air entering during the temperature and humidity cycle test, making the temperature adjustment rate faster. At the same time, the user can also adjust the gas flow control valve 93 through the control component to control the temperature rise and fall rate in the storage box, making the use range wider.

[0040] Through the setting of the above structure, one device can realize the functions of a constant temperature and humidity test chamber and a hot and cold shock test chamber, integrating multiple test functions into one, making the equipment more widely used and avoiding the space occupied by multiple devices.

[0041] At the same time, if Figure 2-3 As shown, the box body 1 and the baffle are provided with a vacuum chamber 15 that is interconnected, and a vacuum pump 16 is provided on the top. When the equipment is started, the air in the vacuum chamber can be extracted by the vacuum pump 16, thereby maintaining a relative vacuum in the vacuum box, so that the insulation effect is better; at the same time, a vacuum chamber is also provided on the insulation board 91, and an air pipe 19 is provided on the insulation board 91. An air hole 20 that is plugged into the air pipe 19 is provided on the baffle 6, and a one-way valve assembly is provided between the air pipe 19 and the air hole 20. When the insulation plate 91 is away from the baffle 6, the air hole and the air pipe are in a sealed state; when the insulation plate 91 is against the baffle 6, thereby blocking and sealing one side of the through groove, the air pipe 19 and the air hole 20 are connected to each other, so that the sealing ring 212 in the air pipe 19 will be opened under the action of the pressure rod 213, and the sealing plate 214 in the air hole will be opened under the adsorption of the magnet on the mounting plate 211, and then the vacuum chamber in the insulation plate 91 will be vacuumed under the action of the vacuum pump, so that the temperatures between the two chambers will not affect each other.

[0042] The conical chamfer 17 on the through groove 7 will fit with the sealing surface of the insulation plate, thereby improving the sealing effect and achieving the mutual independence of the two cavities.

[0043] like Figure 7-8 As shown, a vertical clamping strip 22 is provided on the opposite side of the insulation plate 91, and a clamping plate 23 is provided on the rear edge of the insulation sleeve 94 to be clamped with the clamping strip 22. The clamping strip and the clamping plate can ensure that the insulation sleeve 94 will not be separated from the insulation plate 91 when the insulation plate moves; and the upper and lower ends of the insulation plate 91 are also provided with elastically hinged pressure strips 28, and the insulation sleeve 94 is provided with an edge extending in the direction of the pressure strip, so that the pressure strip 28 can press the edge of the insulation sleeve 94 tightly against the insulation plate under the action of the coil spring to ensure the sealing effect.

[0044] At the same time, an air inlet box is provided at the bottom of the box, and a drying box is provided in the air inlet box, which can filter and dry the air entering the cavity, avoiding frost or drying after the moisture in the air enters the cavity when the humidity in the air is high; at the same time, it can ensure that the humidity of the air entering the cavity will not change too much during the constant humidity and constant temperature test, reducing the impact of moisture in the air on the humidity in the storage box; at the same time, it can also accelerate the rate of humidity reduction when the humidity needs to be lowered.

[0045] The magnets described in the above structure are all samarium cobalt magnets. The soft magnets are made of high-temperature resistant nitrile butadiene-styrene (NBR) magnetic strips.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present invention should be included in the scope of protection of the present invention.

Claims

1. A constant temperature and humidity test chamber, comprising a chamber (1) and a control assembly, characterized in that: A baffle (6) with a through slot (7) is provided in the box body (1), and the baffle (6) divides the box body (1) into a hot chamber (2) and a cold chamber (3); a heating component (4) is provided in the hot chamber (2), and a cooling component (5) is provided in the cold chamber (3); The box body (1) is also slidably connected to a sealable storage box, and the storage box can reciprocate between the cold chamber (3) and the hot chamber (2); it also includes a temperature regulating box (8) connected to the cold chamber (3) and the hot chamber (2); when the storage box is in the middle of the box body (1) and is sealed, the temperature regulating box (8) and the storage box are connected to each other through a connecting pipe (10); the temperature regulating box (8) is also connected to a humidifying component; it also includes temperature sensors (12) respectively arranged in the cold and hot chambers (2) and the storage box and connected to the control component, and a humidity sensor (27) is also arranged in the storage box; it also includes an exhaust pipe connecting the box body (1) with the outside world and the storage box with the outside world; The storage box includes a pair of insulation plates (91) slidably connected to the box body (1) and matched with the through slot (7), the pair of insulation plates (91) are respectively located in the hot chamber (2) and the cold chamber (3), and a material rack (92) is detachably connected between the two; the pair of insulation plates (91) are connected to a power source (93), and an insulation sleeve (94) with a "C"-shaped cross section is detachably connected between the insulation plates (91) and the through slot (7); and further includes a sealing cover (96) detachably arranged between the pair of insulation plates (91), the sealing cover (96) and the insulation sleeve (94) being magnetically connected to each other and used for covering the opening of the storage box; The temperature regulating box (8) is provided with an air inlet hole (82) which is connected to the cold chamber (3) and the hot chamber (2) and has an air inlet fan (81), and a gas flow regulating valve (83) is provided in the air inlet hole (82).

2. A constant temperature and humidity test chamber according to claim 1, characterized in that: The box body (1) is provided with a cabinet door (101); the cabinet door (101) is provided with an observation window; the control component comprises a control panel (102) provided on the box body (1), and the control panel (102) is electrically connected to a heating component (4), a cooling component (5), a temperature sensor (12), a water pump (111), an air inlet fan (81), and a gas flow regulating valve (83).

3. A constant temperature and humidity test chamber according to claim 1, characterized in that: A guide rail (13) is provided inside the box body (1), and a guide block (14) matching the guide rail (13) is provided on one side of the thermal insulation plate (91), and the guide block (14) is connected to the power source (93).

4. A constant temperature and humidity test chamber according to claim 1, characterized in that: Conical chamfers (17) are provided on both sides of the through groove (7); a sealing surface (18) matching the conical chamfers (17) is provided on the edge of the thermal insulation plate (91); a sealing gasket is attached to the sealing surface (18); the box body (1) and the baffle (6) are integrally provided, and a vacuum chamber (15) communicating with each other is provided between the two, and the vacuum chamber (15) is connected to a vacuum pump (16).

5. A constant temperature and humidity test chamber according to claim 4, characterized in that: A pair of heat insulation plates are hollow and have air pipes (19) arranged on opposite sides. The baffle (6) is provided with air holes (20) that are plugged into and matched with the air pipes (19). A one-way valve assembly (21) is provided between the air holes (20) and the air pipes (19).

6. The constant temperature and humidity test chamber according to claim 5, characterized in that: The one-way valve assembly (21) includes a mounting plate (211) fixedly arranged in the air pipe (19), and a sealing ring (212) elastically connected to the air pipe (19) is arranged on the edge of the mounting plate (211); it also includes a tubular pressure rod (213) fixedly arranged in the air hole (20) and abutting against the sealing ring (212), and a sealing plate (214) elastically connected to the air hole (20) is arranged in the middle of the pressure rod (213); and mutually attracted magnets are arranged between the sealing plate (214) and the mounting plate (211).

7. The constant temperature and humidity test chamber according to claim 1, characterized in that: The cold chamber and the hot chamber are both connected to an air inlet box (24) communicating with the outside world. A drying component (25) is provided in the air inlet box (24). The drying component (25) includes a drying box (26) detachably provided in the air inlet box, and color-changing silica gel is provided in the drying box (26); and further includes a humidity sensor A provided below the drying box (26), and the humidity sensor A is electrically connected to the control panel (102).

8. The constant temperature and humidity test chamber according to claim 1, characterized in that: The thermal insulation sleeve (94) includes a rubber sleeve (941) provided with two sides and filled with thermal insulation material (942); a clamping strip (22) is provided on one side of the thermal insulation board (91); a clamping plate (23) capable of engaging with the clamping strip (22) is provided on the thermal insulation sleeve (94), and the thermal insulation sleeve (94) also includes a pressure strip (28) elastically provided on the thermal insulation board (91) and tightly pressed against the edge of the thermal insulation sleeve.

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