Air-side heating device suitable for top condensation prevention of high and low temperature damp and hot box

Abstract

The utility model relates to the technical field of high and low temperature damp and hot boxes, in particular to a top condensation prevention beside-air heating device suitable for a high and low temperature damp and hot box, and adopts the technical scheme that the top condensation prevention beside-air heating device comprises an experiment box body, a refrigerant heating coil is fixedly mounted at the top of the experiment box body, and a dehumidification evaporator is mounted at the top of the front surface of the experiment box body in an embedded manner; a groove is formed in the air inlet end of the refrigerant heating coil pipe, a first short pipe is vertically installed at the air inlet end of the refrigerant heating coil pipe in a communicating mode, the first short pipe is installed with an air outlet valve of the dehumidification evaporator in a communicating mode, and a first one-way valve is installed at the air inlet end of the refrigerant heating coil pipe in a communicating mode. The air outlet end of the refrigerant heating coil communicates with a second short pipe through a second one-way valve. The air inlet end and the air outlet end of the refrigerant heating coil are communicated with the air outlet end and the air inlet end of the refrigeration assembly respectively, and the refrigeration assembly is fixedly installed on the front face of the experiment box body below the dehumidification evaporator. The utility model has the advantages of preventing the top from condensing and dripping water and reducing the cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to high and low temperature damp heat chamber technical field, concretely to a kind of gas by-pass heating device suitable for high and low temperature damp heat chamber prevents top condensation. BACKGROUND

[0002] In the field of environmental test chamber, condensation phenomenon is a common and thorny problem. When the environmental test chamber is operating, due to the existence of thermal inertia, condensation may occur. When the test chamber is heated, the surface temperature of the working chamber is lower than the ambient temperature, and the humid air meets the working chamber surface below the dew point, and the water vapor will condense on the product surface to form dew drops. During the cooling process, the temperature of the working chamber inner wall cools faster than the air temperature in the working chamber, and the humid air will form dew drops on the inner wall of the shell. The generation of condensation phenomenon is related to many factors such as the material of the sample, the size of the cavity, the heating and cooling rate, the relative humidity, the air pressure and air flow rate in the test chamber.

[0003] In the environmental stress screening test chamber, condensation water will combine with other factors to produce physical / chemical action, which will seriously affect the safety and quality of the product, such as causing metal oxidation / electrochemical corrosion, chemical or electrochemical damage to organic and inorganic surface coating, changing the friction coefficient to cause adhesion or adhesion, material expansion due to absorption effect, physical strength reduction and electrical short circuit.

[0004] At present, the conventional anti-condensation measures have many shortcomings. The top of the working chamber of the damp heat test chamber condenses during the test, and if no measures are taken, the water droplets falling on the user's test product will affect the test results. Set a rain shield on the top of the working chamber, the larger the working chamber of the test chamber, the more difficult to make and install the rain shield, and the unreasonable production of part of the rain shield fixing strip will easily cause injury to the installer, and the rain shield will also increase the load, affecting the heating and cooling rate of the test chamber. Although the dry air system can replace the humid air in the chamber with dry air, the cost of the drying machine is high, which increases the use cost. Therefore, a gas by-pass heating device suitable for high and low temperature damp heat chamber to prevent top condensation is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of gas by-pass heating device suitable for high and low temperature damp heat chamber to prevent top condensation, with the advantages of preventing top condensation and water droplets, avoiding the drawbacks of rain shield, and reducing cost. The problems of top condensation affecting the test product during damp heat test, inconvenient installation and production of rain shield with safety hazards, and high cost of conventional anti-condensation measures are solved.

[0006] To achieve the above object, the utility model provides the following technical scheme: A kind of gas bypass heating device suitable for high-low temperature humidity chamber prevents top condensation, including experimental cabinet, the top of the experimental cabinet is fixedly installed with refrigerant heating coil, installation groove is opened in the top of the front of the experimental cabinet, dehumidification evaporator is embeddedly installed in the installation groove, first short pipe is vertically communicated and installed in the slot on the air inlet end of refrigerant heating coil, the air outlet valve of dehumidification evaporator is communicated and installed with the first short pipe, first check valve is communicated and installed on the air inlet end of refrigerant heating coil, second short pipe is communicated and installed with the air outlet end of refrigerant heating coil by second check valve.

[0007] The air inlet end and the air outlet end of the refrigerant heating coil are communicated and installed with the air outlet end and the air inlet end of the refrigerating assembly, and the refrigerating assembly is fixedly installed on the front of the experimental cabinet below the dehumidification evaporator.

[0008] Preferably, the back of the experimental cabinet is designed as an open structure and is rotatably installed with a cabinet door by a hinge, a reserved groove is arranged on the top of the experimental cabinet in an S-shaped manner and matches the size of the refrigerant heating coil, a mounting rack is fixedly installed on the top of the front of the experimental cabinet for fixing the refrigerating assembly, and the experimental cabinet and the cabinet door are sealed by a sealing rubber strip.

[0009] In the design, the back of the experimental cabinet is designed as an open structure and the cabinet door is rotatably installed by a hinge, so that the experimental personnel can conveniently take and place experimental articles; the reserved groove is arranged on the top of the experimental cabinet in an S-shaped manner and matches the size of the refrigerant heating coil, so that the refrigerant heating coil can be conveniently installed and fixed, and the top of the cabinet can be better heated to prevent condensation; the mounting rack is arranged on the top of the front of the experimental cabinet for fixing the refrigerating assembly, so that the stability of the refrigerating assembly can be ensured; and the experimental cabinet and the cabinet door are sealed by a sealing rubber strip, so that the heat loss in the cabinet and the entry of external moisture can be effectively prevented, and the stability of the temperature and humidity environment in the cabinet can be ensured.

[0010] Preferably, the back of the experimental cabinet is designed as an open structure and is rotatably installed with a cabinet door by a hinge, a reserved groove is arranged on the top of the experimental cabinet in an S-shaped manner and matches the size of the refrigerant heating coil, a mounting rack is fixedly installed on the top of the front of the experimental cabinet for fixing the refrigerating assembly, and the experimental cabinet and the cabinet door are sealed by a sealing rubber strip.

[0011] In the design, the fan is installed in the evaporator body of the dehumidification evaporator, air flow is accelerated, air and the evaporator body are fully heat exchanged, and dehumidification efficiency is improved; the drainage device is arranged on one side of the evaporator body and is communicated with the first short pipe, condensed water generated in the dehumidification process is discharged in time, and the normal operation of the device is not affected by accumulated water; the air inlet valve of the evaporator body is communicated with the second short pipe and is designed in a fin type structure, the heat exchange area is increased, and the dehumidification capacity of the dehumidification evaporator is improved.

[0012] Preferably, the refrigeration assembly comprises a compressor set and a liquid accumulator, the compressor set is installed in communication with the liquid accumulator through an air outlet pipe, the compressor set and the liquid accumulator are fixedly connected with the experimental box body through mounting frames respectively, the refrigerating capacity of the compressor set is selected according to the volume of the experimental box body and the required temperature and humidity control range, and the volume of the liquid accumulator is designed according to the circulating amount of the refrigerant and the stability of system operation.

[0013] In the design, the compressor set is installed in communication with the liquid accumulator through the air outlet pipe, the normal circulation of the refrigerant in the system is ensured; the compressor set and the liquid accumulator are fixedly connected with the experimental box body through mounting frames respectively, the firmness of the overall installation of the refrigeration assembly is ensured; the refrigerating capacity of the compressor set is selected according to the volume of the experimental box body and the required temperature and humidity control range, and the temperature and humidity control requirements of different specifications of experimental box bodies are met; the volume of the liquid accumulator is designed according to the circulating amount of the refrigerant and the stability of system operation, and the stability of the refrigeration system operation is ensured.

[0014] Preferably, the compressor set is provided with an air inlet pipe at the top, and the top of the air inlet pipe is installed in communication with a second check valve.

[0015] In the design, the air inlet pipe is arranged at the top of the compressor set, and the top of the air inlet pipe is installed in communication with the second check valve, so that the refrigerant after heat exchange in the dehumidification evaporator can smoothly enter the compressor set, and the smoothness of the circulation of the refrigerant in the whole system is ensured.

[0016] Preferably, the liquid accumulator is provided with an air outlet pipe at the top, and the top of the air outlet pipe is installed in communication with a first check valve.

[0017] In the design, the air outlet pipe is arranged at the top of the liquid accumulator, and the top of the air outlet pipe is installed in communication with the first check valve, so that the compressed high-temperature and high-pressure refrigerant gas can smoothly flow out of the liquid accumulator and enter the refrigerant heating coil, and the normal circulation of the refrigerant between the refrigeration assembly and the refrigerant heating coil is ensured.

[0018] Compared with the prior art, the dehumidification evaporator has the advantages that:

[0019] The utility model discloses a refrigerant heating coil is set to the top of experiment box body, and its air inlet end and air outlet end are communicated with the air outlet end and air inlet end of refrigeration assembly respectively, utilize the heat generated when the refrigeration assembly works, make refrigerant circulate in heating coil, and the top of experiment box body is heated continuously.

[0020] The utility model discloses a refrigerant heating coil is set to the top of experiment box body, and its air inlet end and air outlet end are communicated with the air outlet end and air inlet end of refrigeration assembly respectively, utilize the heat generated when the refrigeration assembly works, make refrigerant circulate in heating coil, and the top of experiment box body is heated continuously.

[0021] The utility model discloses a refrigerant heating coil is set to the top of experiment box body, and its air inlet end and air outlet end are communicated with the air outlet end and air inlet end of refrigeration assembly respectively, utilize the heat generated when the refrigeration assembly works, make refrigerant circulate in heating coil, and the top of experiment box body is heated continuously. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the front view structure schematic drawing of the utility model;

[0023] Figure 2 It is the experiment box body structure schematic drawing of the utility model;

[0024] Figure 3 It is the refrigerant heating coil and dehumidification evaporator connection structure schematic drawing of the utility model;

[0025] Figure 4 It is the refrigeration assembly structure schematic drawing of the utility model.

[0026] In the drawing: 1, experiment box body;11, box door;12, hinge;13, reservation groove;14, installation groove;15, mounting frame;2, refrigerant heating coil;21, first short pipe;22, first check valve;23, second short pipe;24, second check valve;3, dehumidification evaporator;4, refrigeration assembly;41, compressor unit;411, air inlet pipe;412, air outlet pipe;42, liquid accumulator;421, exhaust pipe. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0028] Embodiment one

[0029] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the utility model provides an embodiment: a kind of gas bypass heating device suitable for high-low temperature humidity chamber prevents top condensation, including experimental box body 1, experimental box body 1 top fixed installation has refrigerant heating coil pipe 2, experimental box body 1 top front is provided with mounting groove 14, dehumidification evaporator 3 is embedded in mounting in mounting groove 14, the air inlet end of refrigerant heating coil pipe 2 is slotted and vertically communicated and is equipped with first short pipe 21, first short pipe 21 is communicated and installed with the air outlet valve of dehumidification evaporator 3, the air inlet end of refrigerant heating coil pipe 2 is communicated and installed with first check valve 22, the air outlet end of refrigerant heating coil pipe 2 is communicated and installed with second short pipe 23 by second check valve 24;

[0030] the air inlet end and the air outlet end of refrigerant heating coil pipe 2 are communicated and installed with the air outlet end and the air inlet end of refrigeration assembly 4 respectively, and refrigeration assembly 4 is fixedly installed on the front of experimental box body 1 below dehumidification evaporator 3.

[0031] Specifically, by setting refrigerant heating coil pipe 2 on the top of experimental box body 1, and the air inlet end and the air outlet end thereof are communicated with the air outlet end and the air inlet end of refrigeration assembly 4 respectively, the heat generated when refrigeration assembly 4 works is utilized to make the refrigerant circulate in the heating coil and continuously heat the top of experimental box body 1. This makes the temperature of the top of experimental box body 1 keep close to the air temperature in the box during the hygrothermal test, effectively avoids water vapor condensation caused by temperature difference, and achieves the effects of preventing condensation and dripping water on the top, and protecting test products from the influence of condensation water.

[0032] By setting refrigerant heating coil pipe 2 to prevent condensation, the traditional rain baffle design is abandoned. It is no longer necessary to make and install a rain baffle, which avoids the inconvenience of installation caused by the oversize of the rain baffle, eliminates the safety hazards of installation personnel caused by unreasonable manufacturing of the rain baffle fixing strip, avoids the influence of the increased load of the rain baffle on the temperature rising and falling rate of the test box, and achieves the effect of avoiding the related disadvantages of the rain baffle.

[0033] The anti-condensation function is realized by setting the dehumidification evaporator 3 and using the refrigeration assembly 4 to work with the refrigerant heating coil 2, replacing the traditional anti-condensation method of increasing the dry air system. Without using the high-cost drying machine, the equipment purchase cost and subsequent operation cost are reduced, achieving the effect of reducing cost.

[0034] Embodiment Two

[0035] In order to realize more convenient equipment operation, optimize the installation effect of the heating coil, ensure the stable operation of the refrigeration assembly, and maintain the stability of the temperature and humidity in the box, as shown in Figure 1 and Figure 2 In this embodiment, the back of the experimental box 1 is designed as an open structure and is rotatably installed with the box door 11 through the hinge 12, the top of the experimental box 1 is provided with a reserved groove 13 matching the size of the refrigerant heating coil 2 and arranged in an S shape, the top of the front of the experimental box 1 is fixedly installed with a mounting bracket 15 for fixed installation of the refrigeration assembly 4, and the experimental box 1 and the box door 11 are sealed by a sealing rubber strip.

[0036] In the design, the back of the experimental box 1 is designed as an open structure and the box door 11 is rotatably installed through the hinge 12, which realizes convenient taking and placing of experimental items by the experimental personnel; the top of the experimental box 1 is provided with a reserved groove 13 matching the size of the refrigerant heating coil 2 and arranged in an S shape, which realizes convenient installation and fixation of the refrigerant heating coil 2, so that it can better heat the top of the box to prevent condensation; the top of the front of the experimental box 1 is provided with a mounting bracket 15 for fixed installation of the refrigeration assembly 4, which realizes stable installation of the refrigeration assembly 4; the experimental box 1 and the box door 11 are sealed by a sealing rubber strip, which realizes effective prevention of heat loss in the box and entry of external moisture, and ensures the stability of the temperature and humidity environment in the experimental box.

[0037] Further, the back of the experimental box 1 is designed as an open structure and is rotatably installed with the box door 11 through the hinge 12, the top of the experimental box 1 is provided with a reserved groove 13 matching the size of the refrigerant heating coil 2 and arranged in an S shape, the top of the front of the experimental box 1 is fixedly installed with a mounting bracket 15 for fixed installation of the refrigeration assembly 4, and the experimental box 1 and the box door 11 are sealed by a sealing rubber strip.

[0038] Embodiment Three

[0039] In order to realize efficient dehumidification, optimize the refrigerant circulation path, and ensure the stable operation of the refrigeration system, as shown in Figure 3 and Figure 4As shown, in the embodiment, by installing a fan inside the evaporator body of the dehumidification evaporator 3, the air flow is accelerated, the air is fully heat exchanged with the evaporator body, the dehumidification efficiency is improved; by arranging the drainage device on one side of the evaporator body and communicating with the first short pipe 21, the condensed water generated during the dehumidification process is discharged in time, and the accumulation of water is avoided to affect the normal operation of the device; by communicating the air inlet valve of the evaporator body with the second short pipe 23 and adopting a fin type structure design, the heat exchange area is increased, and the dehumidification capacity of the dehumidification evaporator 3 is enhanced.

[0040] Further, the refrigeration assembly 4 includes a compressor set 41 and a liquid accumulator 42, the compressor set 41 is installed in communication with the liquid accumulator 42 through the air outlet pipe 412, the compressor set 41 and the liquid accumulator 42 are respectively fixedly connected with the experimental box body 1 through the mounting frame 15, the refrigerating capacity of the compressor set 41 is selected according to the volume of the experimental box body 1 and the required temperature and humidity control range, and the volume of the liquid accumulator 42 is designed according to the circulating amount of the refrigerant and the stability of the system operation.

[0041] In the design, by installing the compressor set 41 in communication with the liquid accumulator 42 through the air outlet pipe 412, the normal circulation of the refrigerant in the system is ensured; by respectively fixing the compressor set 41 and the liquid accumulator 42 with the experimental box body 1 through the mounting frame 15, the firmness of the overall installation of the refrigeration assembly 4 is ensured; by selecting the refrigerating capacity of the compressor set 41 according to the volume of the experimental box body 1 and the required temperature and humidity control range, the temperature and humidity control requirements of different specifications of the experimental box body 1 are met; by designing the volume of the liquid accumulator 42 according to the circulating amount of the refrigerant and the stability of the system operation, the stability of the refrigeration system operation is ensured.

[0042] Further, the compressor set 41 is provided with an air inlet pipe 411 at the top, and the top of the air inlet pipe 411 is installed in communication with the second one-way valve 24.

[0043] In the design, by arranging the air inlet pipe 411 at the top of the compressor set 41 and installing the top of the air inlet pipe 411 in communication with the second one-way valve 24, the refrigerant after heat exchange in the dehumidification evaporator 3 can smoothly enter the compressor set 41, and the smoothness of the circulation of the refrigerant in the whole system is ensured.

[0044] Further, the liquid accumulator 42 is provided with an air outlet pipe 421 at the top, and the top of the air outlet pipe 421 is installed in communication with the first one-way valve 22.

[0045] In the design, by arranging the air outlet pipe 421 at the top of the liquid accumulator 42 and installing the top of the air outlet pipe 421 in communication with the first one-way valve 22, the compressed high-temperature and high-pressure refrigerant gas can be smoothly discharged from the liquid accumulator 42 and enter the refrigerant heating coil 2, and the normal circulation of the refrigerant between the refrigeration assembly 4 and the refrigerant heating coil 2 is ensured.

[0046] The compressor set 41 compresses refrigerant into high-temperature and high-pressure gas, the high-temperature and high-pressure refrigerant gas is discharged from the exhaust pipe 421 at the top of the liquid accumulator 42, enters the refrigerant heating coil 2 through the first one-way valve 22. Due to the action of the first one-way valve 22, the refrigerant can only flow in one direction, ensuring the normal circulation of the refrigerant in the coil.

[0047] The high-temperature refrigerant entering the refrigerant heating coil 2 heats the top of the experimental box 1, preventing condensation due to excessive temperature difference at the top. The heated refrigerant enters the evaporator body of the dehumidification evaporator 3 through the second one-way valve 24 and the second short pipe 23. In the evaporator body, the refrigerant absorbs the heat of the surrounding air and vaporizes, the fan accelerates the air flow, so that the air and the evaporator body are fully heat exchanged, the water vapor in the air condenses into water droplets, and is discharged through the drainage device.

[0048] The vaporized refrigerant returns to the air inlet end of the refrigerant heating coil 2 through the first short pipe 21, is compressed by the compressor set 41 of the refrigeration assembly 4, and starts a new cycle. During the whole process, the one-way valve ensures the one-way flow of the refrigerant, so that the system runs stably.

[0049] After the test is completed, the refrigeration assembly 4 is turned off, and the box door 11 is opened to take out the test product.

[0050] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A gas bypass heating device suitable for preventing top condensation in a high and low temperature humidity chamber, comprising an experimental chamber body (1), a refrigerant heating coil (2) is fixedly installed on the top of the experimental chamber body (1), an installation groove (14) is formed on the front top of the experimental chamber body (1), and a dehumidification evaporator (3) is embeddedly installed in the installation groove (14), characterized in that: a first short pipe (21) is vertically and communicatively installed on the slotted air inlet end of the refrigerant heating coil (2), the first short pipe (21) is communicatively installed with an air outlet valve of the dehumidification evaporator (3), a first check valve (22) is communicatively installed on the air inlet end of the refrigerant heating coil (2), and a second short pipe (23) is communicatively installed on the air outlet end of the refrigerant heating coil (2) through a second check valve (24). The air inlet end and the air outlet end of the refrigerant heating coil (2) are communicatively installed with the air outlet end and the air inlet end of a refrigeration assembly (4) respectively, and the refrigeration assembly (4) is fixedly installed on the front of the experimental chamber body (1) below the dehumidification evaporator (3).

2. The gas bypass heating device for preventing condensation on the top of a high and low temperature and humidity chamber according to claim 1, characterized in that, The back of the experimental chamber body (1) is designed in an open structure and is rotatably installed with a chamber door (11) through a hinge (12), a reserved groove (13) matching the size of the refrigerant heating coil (2) and arranged in an S shape is formed on the top of the experimental chamber body (1), an installation rack (15) for fixed installation of the refrigeration assembly (4) is fixedly installed on the top of the front of the experimental chamber body (1), and the experimental chamber body (1) and the chamber door (11) are sealed by a sealing rubber strip.

3. The gas bypass heating device for preventing condensation on the top of the high and low temperature and humidity chamber according to claim 1, characterized in that, The dehumidification evaporator (3) comprises an evaporator body, a fan and a drainage device, the fan is installed inside the evaporator body, the drainage device is arranged on one side of the evaporator body and communicates with the first short pipe (21), an air inlet valve of the evaporator body communicates with the second short pipe (23), and the evaporator body is designed in a finned structure.

4. The gas bypass heating device for preventing condensation on the top of a high and low temperature damp heat chamber according to claim 1, characterized in that, The refrigeration assembly (4) comprises a compressor set (41) and a liquid accumulator (42), the compressor set (41) is communicatively installed with the liquid accumulator (42) through an air outlet pipe (412), the compressor set (41) and the liquid accumulator (42) are fixedly connected with the experimental chamber body (1) through the installation rack (15), the refrigerating capacity of the compressor set (41) is selected according to the volume of the experimental chamber body (1) and the required temperature and humidity control range, and the volume of the liquid accumulator (42) is designed according to the circulating amount of the refrigerant and the stability of system operation.

5. The gas bypass heating device for preventing condensation on the top of the high and low temperature and humidity chamber according to claim 4, characterized in that, The compressor set (41) is provided with an air inlet pipe (411) on the top thereof, and the air inlet pipe (411) is communicatively installed with the second check valve (24) on the top thereof.

6. The gas bypass heating device for preventing condensation on the top of a high and low temperature damp heat chamber according to claim 4, characterized in that, The liquid accumulator (42) is provided with an air outlet pipe (421) on the top thereof, and the air outlet pipe (421) is communicatively installed with the first check valve (22) on the top thereof.

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