CN110362136B

CN110362136B - Temperature and humidity sensing device, temperature and humidity test box and temperature and humidity control method

Info

Publication number: CN110362136B
Application number: CN201910612733.3A
Authority: CN
Inventors: 徐祎君; 徐月明
Original assignee: Xutemp Temptech Co ltd
Current assignee: Zhejiang Xuezhongtan Environmental Technology Co ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2021-08-17
Anticipated expiration: 2039-07-09
Also published as: CN110362136A

Abstract

The invention provides a temperature and humidity sensing device for a temperature and humidity test chamber, which comprises a temperature and humidity transmitter, a temperature and humidity transmitter heat-insulating sleeve, a sensing air guide sleeve and an air flow adjusting pipe, wherein the temperature and humidity transmitter heat-insulating sleeve is arranged on the temperature and humidity transmitter heat-insulating sleeve; the invention also provides a temperature and humidity test box which comprises the following components: a temperature and humidity sensing device is arranged in the temperature and humidity test box; the temperature and humidity sensing device also comprises an air sampling pipe and an air sampling pipe heat insulation sleeve, or as an improvement, the temperature and humidity sensing device also comprises a micro fan; the invention also provides a temperature and humidity acquisition and control method, which comprises the following steps: the method comprises a first method, a second method, a third method and a fourth method, wherein the free end of the electric connection part is electrically connected with an electric control system of a temperature and humidity test box, the combination length of the air flow adjusting pipe and the protective outer cover is adjusted, so that the wind speed on the surface of the sensitive element meets the requirement, the electric control system of the temperature and humidity test box is started, and the air temperature and humidity of the position of interest are collected; and the temperature and humidity control is realized by the temperature and humidity control algorithm of the temperature and humidity test box electrical control system.

Description

Temperature and humidity sensing device, temperature and humidity test box and temperature and humidity control method

Technical Field

The invention relates to a temperature and humidity test chamber, in particular to a temperature and humidity sensing device, a temperature and humidity test chamber and a temperature and humidity control method.

Background

The temperature and humidity test box is necessary environmental test equipment for high-temperature, low-temperature, high-low temperature constant or alternating damp-heat tests of complete machines, parts, new materials and the like of electronic and electrical products, is used for testing the environmental adaptability, reliability and safety of the complete machines, the parts and the new materials of the electronic and electrical products under constant or variable temperature or temperature and humidity conditions, and is widely applied to environmental adaptability tests, reliability and safety tests of new products, new materials, new processes and the like in the fields of aerospace, national defense and military industry, electronic and electrical products, semiconductors and the like.

Plant growth tests, mold culture tests, seed germination tests and biological and animal feeding are dependent on certain temperature and humidity or temperature and humidity conditions; in order to examine the quality guarantee period and the validity period of raw materials of food, medicine and cosmetics and finished products thereof, food and medicine supervision organizations, testing organizations and new product research and development, process research and quality assurance departments of the manufacturing industry all require that stability tests such as temperature tests, humidity tests, acceleration tests, long-term tests and the like are carried out on the food, the medicine and the cosmetics according to certain specifications such as GMP certification. The growth test chamber and the stability test chamber are environmental test equipment for providing simulated temperature and humidity conditions to meet the test requirements.

Different from a temperature and humidity environment under natural conditions, the simulated temperature and humidity environment has the characteristics of wide temperature and humidity range, quick change and frequent manual intervention. The temperature and humidity test is usually related to the environmental temperature condition of (5-95) DEG C, however, the temperature range of many temperature and humidity test chambers is as wide as (-40 to +150) DEG C, even (-70 to +180) DEG C; the temperature and humidity test boxes are provided, the temperature change rate is higher than (5-15) ° c/min, even if a humidity test is not needed, a temperature and humidity transmitter in the traditional technology is fixedly arranged in a working space of the temperature and humidity test box, and is subjected to the influence of severe temperature and humidity conditions for a long time, and a high-reliability temperature and humidity transmitter capable of adapting to a wide temperature range or rapid temperature change needs to be selected, so that the cost is high; even so, the life, maintenance and replacement problems of temperature and humidity transmitters have long plagued manufacturers and wide users of equipment.

Even if under the experimental environment that the humiture scope is close to natural condition, the equipment operation in-process is influenced by artificial intervention like opening the door and closing the door, humidification and spraying, because there is the difference in the humiture of working space and external environment, or local range's air humidity saturation, causes the condensation of humiture transmitter sensing element surface and pin and the corrosion and the short circuit of internal circuit frequently, under the simulation humiture environment, traditional technology fixed mounting's humiture transmitter, its life expectancy is less than the application under the natural condition far away.

Particularly, the temperature and humidity of the sensitive surface of the temperature and humidity transmitter has larger difference with the actual working space of the temperature and humidity test box according to the characteristics of forced ventilation circulation of the temperature and humidity test box, the influence of adjusting ventilation rate and sample stacking density aiming at application requirements and the like; similarly, due to ventilation, dust, powder, spray and secretion, excrement and falling objects of biological samples in the working space of the temperature and humidity test box do not affect the sensitivity and accuracy of the sensitive surface, and the temperature and humidity transmitter fixedly installed in the traditional technology is difficult to avoid due to difficult maintenance, measurement errors and fluctuation degree increase.

Aiming at the application of a temperature and humidity light irradiation test box, the radiation generated by an irradiation light source in a working space influences the micro-area temperature and molecular motion of the surface of a sensitive element of a temperature and humidity transmitter and the absorption and release of moisture, so that the temperature and humidity transmitter fixedly installed in the traditional technology is difficult to coordinate the temperature and humidity measurement control requirement and the installation and ventilation requirement on how to avoid the adverse influence of irradiation.

Based on the above analysis, the temperature and humidity transmitter of the temperature and humidity test chamber fixedly installed in the conventional technology has short expected life, high maintenance cost, low temperature and humidity measurement accuracy, large fluctuation degree and poor uniformity caused by the influence of ventilation and irradiation, which become the pain points and difficulties of the industry, besides the reliability and high cost required by the severe environment.

Accordingly, there is a need for improvements in the art.

Disclosure of Invention

The invention aims to solve the technical problem of providing a temperature and humidity sensing device, a temperature and humidity test box and a temperature and humidity control method which are low in cost, high in reliability, long in service life, accurate in measurement and convenient to maintain and replace.

In order to solve the above technical problems, the present invention provides a temperature and humidity sensing device for a temperature and humidity test chamber, comprising: the temperature and humidity sensor comprises a temperature and humidity transmitter, a temperature and humidity transmitter heat insulation sleeve, a sensing air guide sleeve and an air flow adjusting pipe;

the sensing air guide sleeve comprises an outer sleeve seat and an outer sleeve cover which are matched; the outer cover seat comprises an outer cover seat bottom plate, two long side plates and two short side plates; a ventilation interface tube and an electric connection part crossing tube are arranged on one short side plate and are communicated with the cavity of the outer cover seat;

the temperature and humidity transmitter is arranged in the cavity of the outer cover seat; the temperature and humidity transmitter comprises a sensing part, a transmitting part and an electric connection part, wherein the sensing part comprises a sensitive element and a protective outer cover; the sensitive element, the transmitting part and the electric connection part are sequentially connected in a sealing manner;

the free end of the electric connection part is led out of the cavity of the outer housing base to the outside of the outer housing base through the electric connection part crossing pipe.

As an improvement of the temperature and humidity sensing device for the temperature and humidity test chamber of the invention:

the protective cover is a hollow barrel-shaped cylinder, one end of the protective cover is provided with an opening, the other end of the protective cover is provided with a circular vent hole, and the circumference of the protective cover is provided with a rectangular vent hole;

the protective outer cover is sleeved on the periphery of the sensitive element, the sensitive element is positioned in the protective outer cover, and the protective outer cover is connected with the sensitive element through threads;

the one end that the protection dustcoat was provided with circular ventilation hole inserts the one end of air flow control tube, the other end cover of air flow control tube is established on the inboard end of ventilation mouth-piece.

As a further improvement of the temperature and humidity sensing device for the temperature and humidity test chamber, the temperature and humidity sensing device comprises the following components:

the axes of the interface tube and the electric connection part penetrating tube are perpendicular to the short side plate;

the periphery of the electric connection part and the inner wall of the electric connection part penetrating through the pipe are mechanically sealed.

the outer cover is provided with an outer cover vent hole matched with the sensitive element; the sum of the areas of the through holes of the vent holes of the outer cover is larger than or equal to the area of the inner section of the vent interface pipe.

the temperature and humidity sensing device also comprises a fixer; the fixer is arranged on the outer surface of the bottom plate or the long side plate of the housing seat.

The invention also provides a temperature and humidity test box which comprises the following components:

the temperature and humidity test box is provided with the temperature and humidity sensing device; the temperature and humidity sensing device also comprises an air sampling pipe and an air sampling pipe heat-insulating sleeve, wherein the air sampling pipe heat-insulating sleeve is sleeved on the air sampling pipe;

when the sensing air guide sleeve is fixed at any interest point position of a partition plate, a side plate, a top plate or a bottom plate in a working space of the temperature and humidity test box through a fixer, one end of the air sampling tube is hermetically connected with the outer side end of the ventilation interface tube, and the other end of the air sampling tube is hermetically connected with a negative pressure port of the ventilation circulation system;

when the sensing air guide sleeve is fixed in the external space of the temperature and humidity test box through the fixer, one end of the air sampling pipe is hermetically connected with the outer side end of the ventilation interface pipe, and the other end of the air sampling pipe is hermetically connected with the positive pressure port of the ventilation circulation system.

As an improvement on the temperature and humidity test box of the invention:

the temperature and humidity test box is provided with the temperature and humidity sensing device; the temperature and humidity sensing device further comprises a micro fan, the micro fan comprises a micro fan negative pressure port and a micro fan positive pressure port, and the micro fan negative pressure port is combined with the outer surface of the sensing air guide sleeve outer cover vent hole in a sealing mode.

As a further improvement of the temperature and humidity test box of the invention:

the temperature and humidity sensing device and the temperature and humidity test box realize air circulation through one of the following modes:

a) fixing the sensing air guide sleeve at any interest point position of a partition plate, a side plate, a top plate or a bottom plate in a working space of the temperature and humidity test box through a fixer;

b) the temperature and humidity sensing device also comprises an air sampling pipe and an air sampling pipe heat-insulating sleeve; and the sensing air guide sleeve is fixed in the outer space of the temperature and humidity test box through a fixer, one end of the air sampling tube is hermetically connected with the outer side end of the ventilation interface tube, and the other end of the air sampling tube is hermetically connected with the negative pressure port of the ventilation circulation system of the temperature and humidity test box.

The invention also provides a temperature and humidity acquisition and control method, which comprises the following steps:

the method comprises a first method and a second method;

when the sensing air guide sleeve is fixed at any interest point position of a partition plate, a side plate, a top plate or a bottom plate in a working space of the temperature and humidity test box through a fixer, the use method I is adopted;

the first method comprises the following steps:

a) the sensing air guide sleeve is fixed in the working space of the temperature and humidity test box through a fixer;

b) one end of the air sampling pipe is hermetically connected with the outer side end of the ventilation interface pipe, and the other end of the air sampling pipe is hermetically connected with a negative pressure port of the ventilation circulating system; the free end of the electric connection part is electrically connected with an electric control system of the temperature and humidity test box, and a ventilation circulating system of the temperature and humidity test box is started;

c) according to the air flow of the air sampling pipe and the requirement of the sensitive element on the wind speed, the combined length of the air flow adjusting pipe and the protective outer cover is adjusted, so that the wind speed passing through the surface of the sensitive element meets the requirement;

d) air at the position of the sensing air guide sleeve in the working space is sucked from the vent hole of the outer cover, sequentially passes through the rectangular vent hole, the surface of the sensing element, the circular vent hole, the air flow adjusting pipe, the vent interface pipe, the air sampling pipe and the negative pressure port of the vent circulation system, and finally returns to the working space through the positive pressure port of the vent circulation system;

e) starting an electrical control system of the temperature and humidity test box, and collecting the air temperature and humidity at the position of an interest point in a working space;

f) the temperature and humidity control is realized by the temperature and humidity control algorithm through the temperature and humidity control system of the temperature and humidity test box according to the air temperature and humidity;

when the sensing air guide sleeve is fixed in the external space of the temperature and humidity test box through the fixer, the use method II comprises the following steps:

the second method comprises the following steps:

a) the sensing air guide sleeve is fixed in the outer space of the temperature and humidity test box through a fixer;

b) one end of the air sampling pipe is hermetically connected with the outer side end of the ventilation interface pipe, and the other end of the air sampling pipe is hermetically connected with a positive pressure port of the ventilation circulation system; the free end of the electric connection part is electrically connected with an electric control system of the temperature and humidity test box, and a ventilation circulating system of the temperature and humidity test box is started;

d) air at the negative pressure port of the ventilation circulating system in the working space is sucked from the negative pressure port of the ventilation circulating system, sequentially passes through the positive pressure port of the ventilation circulating system, the air sampling pipe, the ventilation interface pipe, the air flow adjusting pipe, the circular ventilation hole, the surface of the sensitive element and the rectangular ventilation hole, and is finally released to the external space of the temperature and humidity test box through the ventilation hole of the outer cover;

e) starting an electrical control system of the temperature and humidity test box, and collecting the air temperature and humidity at a negative pressure port of the ventilation circulating system;

f) and the temperature and humidity control is realized by the temperature and humidity control algorithm through the temperature and humidity control system of the temperature and humidity test box according to the air temperature and humidity.

As an improvement, the invention also provides a temperature and humidity acquisition and control method, which comprises the following steps:

the method comprises a third method and a fourth method:

when the sensing air guide sleeve is fixed at any interest point position of a partition plate, a side plate, a top plate or a bottom plate in the working space of the temperature and humidity test box through a fixer, the use method is three;

the third method comprises the following steps:

a) fixing the sensing air guide sleeve in a working space of the temperature and humidity test box through a fixer;

b) the free end of the electric connection part is electrically connected with an electric control system of the temperature and humidity test box, and the electric control system of the temperature and humidity test box and the micro fan are started;

c) according to the air flow of the micro fan and the requirement of the sensitive element on the wind speed, the combination length of the air flow adjusting pipe and the protective outer cover is adjusted, so that the wind speed passing through the surface of the sensitive element meets the requirement;

d) air in the working space at the position of the sensing air guide sleeve is sucked from the ventilation interface tube, sequentially passes through the air flow adjusting tube, the circular vent hole, the surface of the sensitive element, the rectangular vent hole, the vent hole of the outer cover and the negative pressure port of the micro fan, and finally returns to the working space through the positive pressure port of the micro fan;

when the sensing air guide sleeve is fixed in the external space of the temperature and humidity test box through the fixer, the use method is four;

the method IV comprises the following steps:

b) one end of the air sampling pipe is hermetically connected with the outer side end of the ventilation interface pipe, and the other end of the air sampling pipe is hermetically connected with a negative pressure port of the ventilation circulating system; the free end of the electric connection part is electrically connected with an electric control system of the temperature and humidity test box, and the electric control system of the temperature and humidity test box and the micro fan are started;

d) air at the negative pressure port of the ventilation circulating system in the working space is sucked from the negative pressure port of the ventilation circulating system, passes through the air sampling pipe, the ventilation interface pipe, the air flow adjusting pipe, the circular vent hole, the surface of the sensitive element, the rectangular vent hole, the vent hole of the outer cover and the negative pressure port of the micro fan in sequence, and is released to the external space of the temperature and humidity test box through the positive pressure port of the micro fan;

e) starting an electrical control system of the temperature and humidity test box, and collecting the air temperature and humidity of a working space at a negative pressure port of the ventilation circulation system;

The temperature and humidity sensing device, the temperature and humidity test box and the temperature and humidity control method have the technical advantages that:

based on the temperature and humidity sensing device, the temperature and humidity test box and the temperature and humidity control method, the problems that a temperature and humidity transmitter is poor in reliability, short in service life, difficult to maintain and replace and low in temperature and humidity measurement accuracy, large in fluctuation degree, poor in uniformity and the like caused by ventilation influence in a severe temperature and humidity simulation environment of the temperature and humidity test box and under a complex temperature and humidity light test condition can be solved.

Based on the temperature and humidity sensor, the temperature and humidity sensor can be conveniently detached from the inside of the temperature and humidity test box or directly installed in the external space of the temperature and humidity test box, and for the temperature and humidity test box with a wide temperature range, a temperature and humidity transmitter with a lower environmental temperature grade can be adopted to replace the temperature and humidity transmitter with a wide environmental temperature grade, so that the model selection and configuration cost of the temperature and humidity transmitter of the temperature and humidity test box are reduced.

The temperature and humidity transmitter used in the temperature and humidity test box is influenced by manual simulation environment and frequent manual intervention in the using process, the biggest problem of the temperature and humidity transmitter used in the temperature and humidity test box is that the service life caused by severe environment influence, rapid temperature and humidity change, sensitive surface pollution, condensation and electric corrosion is very short, and the temperature and humidity transmitter in the traditional technology can be damaged in almost 3-6 months.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a temperature and humidity sensing device according to the present invention;

FIG. 2 is a schematic structural view of the sensing pod 3 of FIG. 1;

FIG. 3 is a schematic structural diagram of the temperature and humidity transmitter 1 in FIG. 1;

FIG. 4 is a schematic structural view of the airflow adjusting pipe 4 and the protective outer cover 112 in FIG. 1 used together to achieve fine adjustment of wind speed;

FIG. 4a is a schematic view of the structure of the air flow adjusting pipe 4 combined with the protection cover 112 in a long length and at a high wind speed;

FIG. 4b is a schematic view of the structure of the air flow adjusting pipe 4 combined with the protective cover 112 at a short length and a low wind speed;

fig. 5 is a schematic structural view of the protective cover 112 in the direction a in fig. 3;

FIG. 6 is a schematic diagram of a module in which a temperature and humidity sensing device is used in cooperation with a temperature and humidity test chamber, and the temperature and humidity sensing device is located in a working space of the temperature and humidity test chamber;

fig. 7 is a schematic diagram of a module in which a temperature and humidity sensing device is used in cooperation with a temperature and humidity test chamber, and the temperature and humidity sensing device is located in an external space of the temperature and humidity test chamber;

fig. 8 is a schematic diagram of a module in which the temperature and humidity sensing device is used in cooperation with the temperature and humidity test chamber through the micro fan 9, and the temperature and humidity sensing device and the micro fan 9 are located in a working space of the temperature and humidity test chamber;

fig. 9 is a schematic diagram of a module in which the temperature and humidity sensing device is used in cooperation with the temperature and humidity test chamber through the micro fan 9, and the temperature and humidity sensing device and the micro fan 9 are located in an external space of the temperature and humidity test chamber;

in fig. 6 to 9, the broken lines indicate the electrical connection passages, and the solid arrows indicate the air flow passages and the air flow directions.

Detailed Description

The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.

Example 1: a temperature and humidity sensing device, a temperature and humidity test box and a temperature and humidity control method are disclosed, as shown in figures 1-5, the temperature and humidity sensing device comprises a temperature and humidity transmitter 1, a temperature and humidity transmitter heat-insulating sleeve 2, a sensing dome 3, an air flow adjusting pipe 4 and a fixer 7. The temperature and humidity test box is provided with a temperature and humidity sensing device, and the temperature and humidity sensing device further comprises an air sampling pipe 5 and an air sampling pipe heat-insulating sleeve 6.

The sensing pod 3 comprises an outer housing seat 31 and an outer housing cover 32, and the outer housing seat 31 and the outer housing cover 32 are mechanically combined to form a closed combination. The housing base 31 is a hollow cuboid with one open side composed of a housing base bottom plate 311, two long side plates 312 and two short side plates 313; a ventilation interface tube 3131 and an electric connection portion crossing tube 3132 are arranged on one short side plate 313, the ventilation interface tube 3131 and the electric connection portion crossing tube 3132 are both communicated with a cavity of the outer cover seat 31, and the axes of the interface tube 3131 and the electric connection portion crossing tube 3132 are both perpendicular to the short side plate 313. The outer surface of the transmitting part 12 of the temperature and humidity transmitter 1 is provided with a temperature and humidity transmitter heat-insulating sleeve 2, so that the risk of temperature difference and condensation inside and outside the transmitting part 12 can be reduced under the conditions of frequent opening and closing of a box door and rapid temperature change.

A plurality of outer cover vent holes 321 are distributed on part of the outer cover 32, the sum of the through hole areas of all the outer cover vent holes 321 is larger than or equal to the area of the inner cross section of the vent interface tube 3131, and the area of the outer cover vent holes 321 corresponds to the projection area of the geometric center position of the surface of the sensitive element 111 (the area of the outer cover vent holes 321 shown in fig. 1 is positioned right above the geometric center of the surface of the sensitive element 111). The sensing air guide sleeve 3 is made of rigid materials such as metal, engineering plastics and the like; the fixer 7 is mechanically combined with the outer side of the outer cover base bottom plate 311 or the long side plate 312, the fixer 7 is used for fixing the sensing air guide sleeve 3 to the working space or the outer space of the temperature and humidity test box, and the fixing mode includes, but is not limited to, screw fastening, suction cup suction, magnetic material suction and the like.

The temperature and humidity transmitter 1 is disposed in the cavity of the housing base 31. The temperature and humidity transmitter 1 comprises three parts which are sequentially connected and hermetically combined, namely a sensing part 11, a transmitting part 12 and an electric connecting part 13, wherein the sensing part 11 comprises a sensitive element 111 and a protective outer cover 112. The sensitive element 111, the transmitting part 12 and the electric connection part 13 are sequentially connected in a sealing manner, and the protective outer cover 112 is sleeved on the periphery of the sensitive element 111.

The temperature and humidity transmitter heat preservation sleeve 2 is hermetically wrapped on the periphery of the transmitting part 12 and fixed in the cavity of the housing seat 31, one end of the air flow adjusting pipe 4 is sleeved on the protective housing 112, the other end is sleeved on the inner side end of the ventilation interface pipe 3131, the free end of the electric connection part 13 passes through the pipe 3132 through the electric connection part and is led out of the cavity of the housing seat 31 to the outside of the housing seat 31, and is electrically connected with the electric control system 83 of the temperature and humidity test box. The outer periphery of the electrical connection 13 is mechanically sealed with the inner wall of the electrical connection cross tube 3132.

One end of the air sampling tube 5 is connected with the outer end of the ventilation mouthpiece 3131, and the other end is connected with the ventilation circulating system 81 of the temperature and humidity test chamber. The material of the air sampling tube 5 is preferably an elastic material, such as rubber, which facilitates sealing and bending.

The air sampling tube insulating sleeve 6 ensures that the air in the working space 82 does not get heated or cooled before it reaches the surface of the sensing element 111.

The specific structure of the protective cover 112 is: the protective housing 112 is a hollow cylindrical barrel, one end of the protective housing 112 is provided with an opening, the other end is provided with a plurality of circular ventilation holes 1121, and the circumference of the protective housing 112 is provided with rectangular ventilation holes 1122. The protective outer cover 112 is sleeved on the periphery of the sensitive element 111, the sensitive element 111 is positioned in the protective outer cover 112, and one end of the opening of the protective outer cover 112 is in threaded connection with the sensitive element 111; the sensitive element 111 is positioned in the protective outer cover 112, so that the sensitive element 111 is fully protected; one end of the protective housing 112 provided with the circular vent hole 1121 is inserted into one end of the air flow adjusting tube 4, the other end of the air flow adjusting tube 4 is fitted over the inner end of the vent mouthpiece 3131, and the circular vent hole 1121 and the rectangular vent hole 1122 can allow free circulation of air around the sensor 111.

Considering the structural strength of the protective housing 112, the air flow and the requirement of the sensitive element 111 on the wind speed, the width of the rectangular vent 1122 is 1.0-1.2 mm, the length is 20-25 mm, the edge distance between adjacent rectangular vents 1122 is 1.0-1.2 mm, the diameter of the protective housing 112 is 12-15 mm, and the diameter of the circular vent 1121 is 1.0-1.2 mm, and the reasonable size is determined according to the diameter of the protective housing 112, the diameter of the circular vent 1121 and the edge distance between adjacent rectangular vents 1122.

The combined length of the air flow adjusting pipe 4 and the protective cover 112 can be adjusted (compare fig. 4a and fig. 4b), the combined length is increased (namely, the part of the protective cover 112 in the air flow adjusting pipe 4 is increased), the ventilation area of the circumferential rectangular ventilation holes 1122 is reduced, and the wind speed on the surface of the sensitive element 111 is increased under the condition that the ventilation flow is constant (fig. 4 a); similarly, shortening the coupling length increases the ventilation area of the circumferential rectangular ventilation holes 1122 and reduces the wind speed on the surface of the sensor 111 (fig. 4 b). The air flow rate adjusting pipe 4 is preferably made of an elastic material such as rubber for facilitating sealing and fixing.

The test specification and application of the temperature and humidity test box and different requirements of the temperature and humidity transmitter on the wind speed are easily realized by combining the fine adjustment function of the air flow adjusting pipe 4 on the wind speed.

The temperature and humidity control method comprises the following steps:

method one (as shown in fig. 6):

a) the sensing air guide sleeve 3 is freely fixed at the position of any interest point of a partition plate, a side plate, a top plate or a bottom plate in the working space 82 of the temperature and humidity test box through a fixer 7;

b) one end of the air sampling tube 5 is hermetically connected with the outer side end of the ventilation interface tube 3131, the other end of the air sampling tube is hermetically connected with the negative pressure port 811 of the ventilation circulating system, the free end of the electric connection part 13 is electrically connected with the electric control system 83 of the temperature and humidity test box, and the ventilation circulating system 81 of the temperature and humidity test box is started;

c) according to the air flow of the air sampling pipe 5 and the requirement of the sensing element 111 on the wind speed, the combined length of the air flow adjusting pipe 4 and the protective outer cover 112 is adjusted, so that the wind speed passing through the surface of the sensing element 111 meets the requirement;

d) air in the working space 82 at the position of the sensing air guide sleeve 3 is sucked from the vent hole 321 of the outer cover, passes through the rectangular vent hole 1122, the surface of the sensing element 111, the circular vent hole 1121, the air flow adjusting tube 4, the vent interface tube 3131, the air sampling tube 5 and the vent circulation system negative pressure port 811 in sequence, and finally returns to the working space 82 through the vent circulation system positive pressure port 812;

e) starting an electrical control system 83 of the temperature and humidity test chamber, and collecting the air temperature and humidity at the interest point in the working space 82;

f) the temperature and humidity test box electrical control system 83 realizes temperature and humidity control through a temperature and humidity control algorithm according to the air temperature and humidity;

method two (as shown in fig. 7):

a) the sensing air guide sleeve 3 is freely fixed in the external space of the temperature and humidity test box through a fixer 7;

b) one end of the air sampling pipe 5 is hermetically connected with the outer side end of the ventilation mouthpiece 3131, the other end of the air sampling pipe is hermetically connected with the positive pressure port 812 of the ventilation circulating system, the free end of the electric connection part 13 is electrically connected with the electric control system 83 of the temperature and humidity test box, and the ventilation circulating system 81 of the temperature and humidity test box is started;

d) air in the working space 82 at the negative pressure port 811 of the ventilation circulation system is sucked from the negative pressure port 811 of the ventilation circulation system, passes through the positive pressure port 812 of the ventilation circulation system, the air sampling pipe 5, the ventilation interface pipe 3131, the air flow adjusting pipe 4, the circular vent hole 1121, the surface of the sensitive element 111 and the rectangular vent hole 1122 in sequence, and is finally released to the external space of the temperature and humidity test box through the vent hole 321 of the outer cover;

e) starting an electrical control system 83 of the temperature and humidity test box, and collecting the air temperature and humidity at a negative pressure port 811 of the ventilation circulation system;

f) the temperature and humidity control is realized by the temperature and humidity control algorithm according to the air temperature and humidity by the temperature and humidity test box electrical control system 83.

The first method in the embodiment 1 is as follows: the temperature and humidity sensing device is fixed at any interest point position of a partition plate, a side wall, a top plate and a bottom plate in the working space 82 of the temperature and humidity test box. Air in the working space 82 at the sensing dome 3 is sucked from the hood vent 321, passes through the rectangular vent 1122, the surface of the sensing element 111, the circular vent 1121, the air flow regulating tube 4, the vent mouthpiece 3131, the air sampling tube 5 and the vent circulation system negative pressure port 811 in sequence, and finally returns to the working space 82 through the vent circulation system positive pressure port 812 (fig. 6).

In a traditional temperature and humidity test chamber, a temperature and humidity transmitter is fixedly installed on an air channel of a working space 82 or a ventilation circulating system 81, and the position of the temperature and humidity transmitter represents a reference point for temperature and humidity measurement and control. The larger the working space 82, the further the working space 82 is from the temperature and humidity transmitter, and the larger the temperature and humidity error is. The workspace 82 points of interest represent areas of interest to the humiture test user, including where the sample is located, where the measurement point is located, or other areas that are advantageous for measurement or control. According to the invention, the temperature and humidity sensing device can be fixed at the positions close to interest points, such as the partition plate, the side plate, the top plate, the bottom plate and the like in the working space 82 according to application requirements, so that the accuracy of temperature and humidity measurement and control, the representativeness of sampling and the effectiveness of tests are ensured to the maximum extent.

During the operation of the temperature and humidity test chamber, the chamber door needs to be opened to access the working space 82, including placing a sample, taking out the sample, or performing an inspection on the sample. Due to the temperature and humidity difference inside and outside the working space 82, under a certain temperature and humidity combination condition, the opening or closing of the box door can cause condensation on the surfaces of the sensitive elements 111, the pins, the transmitting part 12 and other electrical parts of the temperature and humidity transmitter 1, and under the power-on state, the condensation on the electrical parts and deposited dust can cause resistance change and chemical reaction on the electrical parts, which can cause measurement, control and display errors, and can cause electrical corrosion, open circuit or short circuit to cause faults in the serious case. According to the temperature and humidity transmitter 1, the temperature and humidity transmitter heat insulation sleeve 2 is adopted for heat insulation in the transmitting part 12, so that the temperature difference and the condensation risk inside and outside the transmitting part 12 before and after the door is opened and closed can be effectively reduced; even if the condensation is unavoidable under the extreme severe environmental conditions, the constant air flow on the surface of the sensing element 111 of the sensing part 11 can avoid the sensing element 111 and the pin thereof from being recovered to normal immediately after the condensation in a short time, thereby effectively relieving the risk of the damage of the electrical parts and the sensing element 111 caused by the condensation under the extreme conditions.

The temperature and humidity test box is not only used for temperature and humidity combined tests, but also can only require temperature tests according to a plurality of test specifications and applications; meanwhile, the temperature test cannot be only used for simulating a mild ground environment, but also has a plurality of test and application requirements for simulating severe local environments, such as temperature environments of severe winter, severe summer heat, desert and plateau, and more tests require simulating high-altitude and universe temperature environments, including extremely low temperature and rapid temperature change. Especially in the application fields of aerospace and military industry, the temperature range of the environment with high and low temperatures is wider, the temperature change is larger, the maximum temperature range is (-70 to +180) DEG C, and the maximum temperature rise and fall rate exceeds 15 ℃/min. In practical application, the temperature conditions of the temperature and humidity combination test are relatively mild, and are usually between (5-75) DEG C. In view of the above, the temperature and humidity transmitter of the temperature and humidity test chamber needs a very wide range of environmental temperature levels, and the price difference is very different. For example, the market price of the temperature and humidity transmitter in the range of (-30-80) DEG C is only 180 yuan/yuan, and the market price of the temperature and humidity transmitter in the range of (-70-180) DEG C is as high as 2500 yuan/yuan. Due to the great price difference, low reliability, high daily maintenance and replacement cost and the like, the reliability and the user experience of the temperature and humidity test box always bother manufacturers and users of related industries. The temperature and humidity sensing device can adopt a temperature and humidity transmitter with a common environment temperature grade, and only needs to be detached when temperature test is needed, wherein the temperature and humidity sensor comprises high and low temperatures with a wide temperature range and rapid temperature change, so that the model selection and configuration cost is effectively reduced, and the service life of the temperature and humidity sensing device is prolonged.

The temperature and humidity test chamber needs to realize artificial environment simulation through heating, cooling, humidifying, dehumidifying and other means, ventilation circulation is a basic condition for ensuring heat transfer and uniform temperature and humidity distribution, and pollutants from samples during the test, particularly secretion and excrement of biological samples, medicaments and nutrient solution for sample treatment and the like have no pollution to the temperature and humidity transmitter. When the temperature and humidity transmitter is fixedly installed, it is almost impossible for a user to perform routine maintenance and replacement of the temperature and humidity transmitter. The temperature and humidity sensing device can be conveniently butted with a temperature and humidity test box through the air sampling pipe 5 and the plug socket of the electric connection part 13, so that the daily maintenance of a temperature and humidity transmitter can be facilitated, the temperature and humidity sensing device can be quickly replaced, and the replacement can be completed by an operator.

Because the temperature and humidity sensing device is located in the working space 82, when the temperature and humidity of the temperature and humidity test box reach a constant state, the temperature and humidity of the temperature and humidity sensing device and parts thereof, the air sampling pipe 5 and the working space 82 are completely consistent, and the air sampling pipe heat-insulating sleeve 6 is not needed in the application scene.

In view of the above problems of fixedly mounting the temperature and humidity transmitter, even if the temperature and humidity sensing device is movably mounted by the first method, the severe environmental conditions of the working space 82 of the temperature and humidity test chamber, including temperature, humidity, irradiation and the like, seriously affect the performance, reliability and safety of the electrical components, such as the measurement and control of the temperature and humidity, the durability of the rubber and plastic material, the dismounting and mounting of the air sampling tube 5 and the electrical connection part, and the like, which are seriously affected by the irradiation. Therefore, the application of the first method still has exceptional cases, and the second method of the invention can further solve the residual problem of the first method.

The second method in example 1 is specifically: the temperature and humidity sensing device is fixed in the external space of the temperature and humidity test chamber, air in the working space 82 is sucked in from the negative pressure port 811 of the ventilation circulation system, is discharged from the positive pressure port 812 of the ventilation circulation system through pressurization of the ventilation circulation system 81, sequentially passes through the air sampling pipe 5, the ventilation interface pipe 3131, the air flow adjusting pipe 4, the circular vent hole 1121, the surface of the sensitive element 111 and the rectangular vent hole 1122, and is finally released to the external space of the temperature and humidity test chamber through the vent hole 321 of the outer cover (fig. 7).

In the second method, the temperature and humidity sensing device is located at any position of the external space of the temperature and humidity test box, such as the exposed space of the side surface, the back surface and the top surface or the hidden space around the electric control system 83, and the specific position depends on the comprehensive consideration of temperature and humidity acquisition, maintenance, replacement, installation and appearance. Because the temperature and humidity sensing device is located in the external space of the working space 82, the air sampling pipe 5 is strictly insulated by the air sampling pipe insulation sleeve 6, so that when the air in the working space 82 reaches the surface of the sensitive element 111 through the air sampling pipe 5, the air is not heated and cooled, and the temperature and the humidity are kept unchanged. When the humidity test is not needed and the temperature test range exceeds the applicable temperature and humidity range of the temperature and humidity transmitter, the isolation of the harsh temperature and humidity conditions can be simply realized by cutting off the air flow of the air sampling pipe 5. The reason that can think is cut off air sampling pipe 5 and has been cut off the sampling of humiture simultaneously, consequently need additionally to equip temperature sensor and satisfy this type of application scene, however temperature sensor's configuration cost is far less than wide temperature and humidity range's humiture transmitter. The temperature and humidity sensing device is far away from the working space 82, and the irradiation in the working space 82 cannot affect the collection and control of the temperature and humidity, so the second method is particularly suitable for a temperature and humidity test box with an irradiation function.

The air exhausted from the temperature and humidity sensor device needs to be supplemented into the working space 82 through a certain channel to maintain the pressure balance of the working space 82. The tightness of the working space 82 of the conventional temperature and humidity test chamber cannot be absolute, that is, there is a possibility of leakage inside and outside the working space 82, such as a shaft hole of a motor of the ventilation circulating system 81, an outlet of condensed water, an inlet of a humidifier, a test hole, a door seal, a balance hole or a balance window, a ventilation port, and the like. These leak paths are sufficient to maintain pressure balance between the interior and exterior of the workspace 82 due to the small amount of air required by the temperature and humidity sensing devices.

Example 2: the temperature and humidity test box has the scene that the regulation required to ventilation circulation speed, and temperature and humidity sensing device still includes miniature fan 9, miniature fan 9 includes miniature fan negative pressure mouth 91 and miniature fan malleation mouth 92, miniature fan negative pressure mouth 91 with the surface seal combination of dustcoat ventilation hole 321, temperature and humidity sensing device with temperature and humidity test box realizes the circulation of air through one of following mode:

a) fixing the sensing dome 3 at any interest point position of a partition board, a side board, a top board or a bottom board in a working space 82 of the temperature and humidity test chamber through a fixer 7 (fig. 8);

b) fixing the sensing dome 3 in the external space of the temperature and humidity test chamber through a fixer 7, wherein one end of the air sampling tube 5 is hermetically connected with the outer side end of the ventilation interface tube 3131, and the other end of the air sampling tube is hermetically connected with the negative pressure port 811 of the ventilation circulation system of the working space 82 of the temperature and humidity test chamber (fig. 9);

the periphery of the air sampling pipe 5 is insulated and insulated by an air sampling pipe insulation pipe 6.

Many test specifications and applications have certain requirements on the ventilation speed of a working space 82 of a temperature and humidity test box, and an adjustable fan ventilation circulating system 81 is generally arranged to meet application requirements, for example, the wind speed of a high-temperature and low-temperature test box is quantitatively specified in the temperature test standard of GJB 150, except that the platform environment of the equipment proves that the use of other speeds is reasonable, and the wind speed near the test piece is not more than 1.7m/s except that the heat transfer which is not in accordance with the reality is generated in the test piece, for the test, the smaller the wind speed is, the better the wind speed is, the larger the wind speed is, the heat exchange between the surface of the test piece and the flowing air flow in the box body is accelerated, and the authenticity of the test is unfavorable; and the high and low temperature test standard of GB/T2423 makes qualitative regulation on wind speed as follows: 1) in the high-low temperature test chamber working space 82, in order to keep the temperature condition and the tolerance value specified in the standard, the temperature can be kept uniform by forced air circulation; 2) in the absence of forced air circulation, the high and low temperature test chamber should be large enough to simulate the effects of "free air conditions" as compared to the size of the test specimen and its total amount of heat dissipated. 3) The wind speed was as low as possible when the test was carried out using a high-low temperature test chamber with forced air circulation.

In order to ensure the uniformity of temperature and humidity in the working space 82 of the temperature and humidity test box, circulating air is required to be arranged in the high-temperature and low-temperature alternating humidity and heat test box. However, in a high-low temperature test box with rapid temperature change and a multi-factor comprehensive environment test box with temperature, humidity, vibration and the like, in order to pursue the temperature change rate, the flow velocity of circulating air flow in the box body must be increased, and the wind speed is usually 2-3 m/s. Therefore, the limitation of the temperature and humidity test chamber on the wind speed is different for different test and application purposes.

Meanwhile, the wind speed affects the time constant of the temperature and humidity transmitter, the wind speed is increased, and the time constant speed is reduced. For a semiconductor temperature and humidity transmitter, the change of the wind speed seriously affects the flow and heat exchange of air, thereby affecting the absorption and release of water vapor by the sensor, and the wind speed is overlarge, the temperature is lower, and the humidity is larger; for a dry-wet bulb temperature and humidity transmitter, the wind speed directly influences the water vapor evaporation of a wet bulb temperature sensor so as to influence the measurement precision of the humidity. Since wind speed affects the measurement of temperature and humidity, temperature and humidity transmitter manufacturers generally calibrate the temperature and humidity transmitter under a specified wind speed condition, or provide a measurement and control algorithm under a certain wind speed condition, so that the temperature and humidity transmitter is required to be used according to a specified wind speed, such as 1m/s, in application. It can be seen that in addition to the strict requirements on wind speed in tests and applications, the design requirements on wind speed are also provided by the temperature and humidity measurement precision, the stability for controlling the fluctuation degree and the dynamic performance.

In order to meet the individual requirements of the temperature and humidity test box on the application, the temperature and humidity test box provides an adjustable fan ventilation circulating system 81, so that the design requirements of the temperature and humidity sensing device on the wind speed cannot be met. Aiming at the problems, the invention can arrange a micro fan 9 with fixed wind speed, such as an axial flow fan, at any position of an airflow channel (described in the method I) and the method II) of the temperature and humidity sensing device, and easily realizes tests and application and different requirements of the temperature and humidity transmitter on the wind speed by combining the fine adjustment function of the air flow adjusting pipe 4 on the wind speed. In practical applications, considering structural convenience, the micro fan 9 is generally disposed on the periphery of the temperature and humidity sensing device near the sensing portion of the temperature and humidity transmitter, such as on the side of the vent 321 of the outer cover; the installation direction of the micro fan 9 determines that the temperature and humidity sensing device works according to the mode that the micro fan negative pressure port 91 is connected or the micro fan positive pressure port 92 is connected; in order to avoid the influence of heat generated by the micro fan during operation on the accuracy of the temperature and humidity transmitter, the micro fan negative pressure port 91 of the micro fan 9 of the embodiment is hermetically combined with the outer surface of the outer cover vent 321 of the sensing dome 3.

The position of the temperature and humidity sensing device determines that the present embodiment operates in a mode corresponding to the first method or the second method of embodiment 1, which is the third method and the fourth method, respectively. In the third method, the sensing air guide sleeve 3 combined with the micro fan 9 is fixed at any interest point position of a partition plate, a side plate, a top plate or a bottom plate in the working space 82 of the temperature and humidity test box through a fixer 7, the air sampling pipe 5 and the air sampling pipe heat preservation pipe 6 are not needed, and the rest is equal to the first method; fixing the sensing air guide sleeve 3 combined with the micro fan 9 in the external space of the temperature and humidity test box through a fixer 7, wherein one end of the air sampling pipe 5 is hermetically connected with the outer side end of the ventilation interface pipe 3131, and the other end of the air sampling pipe is hermetically connected with the negative pressure port 811 of the ventilation circulation system of the temperature and humidity test box; the periphery of the air sampling pipe 5 is insulated and insulated by an air sampling pipe insulation pipe 6.

The third method comprises the following steps:

a) fixing the sensing dome 3 in a working space 82 of the temperature and humidity test box through a fixer 7;

b) the free end of the electric connection part 13 is electrically connected with the electric control system 83 of the temperature and humidity test box, and the electric control system 83 of the temperature and humidity test box and the micro fan 9 are started;

c) according to the air flow of the micro fan 9 and the requirement of the sensitive element 111 on the wind speed, the combined length of the air flow adjusting pipe 4 and the protective outer cover 112 is adjusted, so that the wind speed passing through the surface of the sensitive element 111 meets the requirement;

d) the air in the working space 82 at the position of the sensing air guide sleeve 3 is sucked from the ventilating interface tube 3131, passes through the air flow adjusting tube 4, the circular ventilating hole 1121, the surface of the sensing element 111, the rectangular ventilating hole 1122, the air vent 321 of the outer cover and the micro fan negative pressure port 91 in sequence, and finally returns to the working space 82 through the micro fan positive pressure port 92;

the method IV comprises the following steps:

a) the sensing air guide sleeve 3 is fixed in the outer space of the temperature and humidity test box through a fixer 7;

b) one end of the air sampling tube 5 is hermetically connected with the outer side end of the ventilation interface tube 3131, and the other end of the air sampling tube is hermetically connected with the negative pressure port 811 of the ventilation circulating system; the free end of the electric connection part 13 is electrically connected with the electric control system 83 of the temperature and humidity test box, and the electric control system 83 of the temperature and humidity test box and the micro fan 9 are started;

d) air in the working space 82 at the negative pressure port 811 of the ventilation circulation system is sucked from the negative pressure port 811 of the ventilation circulation system, passes through the air sampling pipe 5, the ventilation interface pipe 3131, the air flow adjusting pipe 4, the circular ventilation hole 1121, the surface of the sensitive element 111, the rectangular ventilation hole 1122, the ventilation hole 321 of the outer cover and the negative pressure port 91 of the micro fan in sequence, and is finally released to the external space of the temperature and humidity test box through the positive pressure port 92 of the micro fan;

e) starting an electrical control system 83 of the temperature and humidity test box, and collecting the air temperature and humidity of the working space 82 at a negative pressure port 811 of the ventilation circulation system;

The embodiment is also applicable to a use scenario in which the temperature and humidity test chamber does not have the ventilation circulating system 81, which is equivalent to a case in which the wind speed of the ventilation circulating system 81 is adjusted to be close to zero.

Example 3: scene of uneven ventilation of sample accumulation in temperature and humidity test box

The basic purpose of the temperature and humidity test chamber is to process samples, and no matter how the ventilation circulating system 81 is designed, the ventilation circulating system under various test conditions can not be fully considered to meet the application requirements without influencing the measurement and control of temperature and humidity, wherein the sample accumulation directly blocks the ventilation circulating system, which is a typical case influencing the application. The normal response, measurement and control of temperature and humidity transmitter may not be ensured to traditional temperature and humidity test case with temperature and humidity transmitter fixed in certain position, and then performance degradation slightly, temperature and humidity lose control when serious, cause pernicious consequences such as local overheat, condensation, excessive humidification and dehumidification.

The temperature and humidity sensing device based on the first method and the third method can simply solve the problems by moving the position of the temperature and humidity sensing device, collecting temperature and humidity of a normal ventilation circulation area, verifying and controlling, and avoids the problems of temperature and humidity measurement accuracy and control fluctuation degree and uniformity caused by accumulation and wind blocking of samples in the working space 82 in special application.

Optionally, based on the temperature and humidity sensing device of the second and fourth methods, the position of the temperature and humidity sampling port (the negative pressure port 811 of the ventilation circulation system) is appropriately changed, including using the air sampling pipe 5 as a further extension, so that the temperature and humidity measurement and control problems caused by sample accumulation and poor ventilation can also be solved.

Finally, it is also noted that the above-mentioned lists merely illustrate a few specific embodiments of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested directly from the disclosure of the present invention by a person skilled in the art are to be considered within the scope of the present invention.

Claims

1. Temperature and humidity sensing device that temperature and humidity test case was used, its characterized in that: the temperature and humidity sensor comprises a temperature and humidity transmitter (1), a temperature and humidity transmitter heat-insulating sleeve (2), a sensing flow-guiding cover (3) and an air flow adjusting pipe (4);

the sensing air guide sleeve (3) comprises an outer sleeve seat (31) and an outer sleeve cover (32) which are matched; the outer cover base (31) comprises an outer cover base bottom plate (311), two long side plates (312) and two short side plates (313); one short side plate (313) is provided with a ventilation interface tube (3131) and an electric connection part crossing tube (3132), and the ventilation interface tube (3131) and the electric connection part crossing tube (3132) are both communicated with a cavity of the outer cover seat (31);

the temperature and humidity transmitter (1) is arranged in a cavity of the outer cover seat (31); the temperature and humidity transmitter (1) comprises a sensing part (11), a transmitting part (12) and an electric connection part (13), wherein the sensing part (11) comprises a sensitive element (111) and a protective outer cover (112); the sensitive element (111), the transmitting part (12) and the electric connecting part (13) are sequentially connected in a sealing manner;

the free end of the electric connection part (13) is led out of the cavity of the outer cover seat (31) to the outside of the outer cover seat (31) through an electric connection part crossing pipe (3132);

the protective housing (112) is a hollow barrel-shaped cylinder, one end of the protective housing (112) is provided with an opening, the other end of the protective housing is provided with a circular vent hole (1121), and the circumference of the protective housing (112) is provided with a rectangular vent hole (1122);

the protective outer cover (112) is sleeved on the periphery of the sensitive element (111), the sensitive element (111) is positioned in the protective outer cover (112), and the protective outer cover (112) is in threaded connection with the sensitive element (111);

one end of the protective outer cover (112) provided with the circular vent hole (1121) is inserted into one end of the air flow adjusting pipe (4), and the other end of the air flow adjusting pipe (4) is sleeved on the inner side end of the ventilation interface pipe (3131).

2. The temperature and humidity sensing device for the temperature and humidity test chamber according to claim 1, wherein:

the axes of the interface tube (3131) and the electric connection part crossing tube (3132) are both vertical to the short side plate (313);

the outer periphery of the electrical connection portion (13) is mechanically sealed with the inner wall of the electrical connection portion crossing the tube (3132).

3. The temperature and humidity sensing device for the temperature and humidity test chamber according to claim 2, wherein:

the outer cover (32) is provided with an outer cover vent hole (321) matched with the sensitive element (111) for use; the sum of the through hole areas of the vent holes (321) of the outer cover cap is larger than or equal to the area of the inner section of the vent interface tube (3131).

4. The temperature and humidity sensing device for the temperature and humidity test chamber according to claim 3, wherein:

the temperature and humidity sensing device also comprises a fixer (7); the fixer (7) is arranged on the outer surface of the cover seat bottom plate (311) or the long side plate (312).

5. Temperature and humidity test chamber equipped with the temperature and humidity sensing device according to any one of claims 1 to 4, characterized in that:

the temperature and humidity test box is provided with the temperature and humidity sensing device; the temperature and humidity sensing device further comprises an air sampling pipe (5) and an air sampling pipe heat-insulating sleeve (6), wherein the air sampling pipe heat-insulating sleeve (6) is sleeved on the air sampling pipe (5);

when the sensing air guide sleeve (3) is fixed at any interest point position of a partition plate, a side plate, a top plate or a bottom plate in a working space (82) of the temperature and humidity test box through a fixer (7), one end of the air sampling tube (5) is hermetically connected with the outer side end of the ventilation interface tube (3131), and the other end of the air sampling tube is hermetically connected with a negative pressure port (811) of the ventilation circulating system;

when the sensing air guide sleeve (3) is fixed in the external space of the temperature and humidity test box through the fixer (7), one end of the air sampling tube (5) is hermetically connected with the outer side end of the ventilation interface tube (3131), and the other end of the air sampling tube is hermetically connected with the positive pressure port (812) of the ventilation circulation system.

6. Temperature and humidity test chamber equipped with the temperature and humidity sensing device according to any one of claims 1 to 4, characterized in that:

the temperature and humidity test box is provided with the temperature and humidity sensing device; temperature and humidity sensing device still includes miniature fan (9), miniature fan (9) are including miniature fan negative pressure mouth (91) and miniature fan malleation mouth (92), miniature fan negative pressure mouth (91) with the surface seal combination of dustcoat ventilation hole (321) of sensing kuppe (3).

7. The temperature and humidity test chamber of claim 6, wherein:

a) fixing the sensing air guide sleeve (3) at any interest point position of a partition plate, a side plate, a top plate or a bottom plate in a working space (82) of the temperature and humidity test box through a fixer (7);

b) the temperature and humidity sensing device also comprises an air sampling pipe (5) and an air sampling pipe heat-insulating sleeve (6); the sensing air guide sleeve (3) is fixed in the external space of the temperature and humidity test box through a fixer (7), one end of the air sampling tube (5) is hermetically connected with the outer side end of the ventilation interface tube (3131), and the other end of the air sampling tube is hermetically connected with a negative pressure port (811) of a ventilation circulation system of the temperature and humidity test box.

8. The temperature and humidity acquisition and control method using the temperature and humidity test chamber according to claim 5, wherein: the method comprises a first method and a second method;

when the sensing air guide sleeve (3) is fixed at any interest point position of a partition plate, a side plate, a top plate or a bottom plate in a working space (82) of the temperature and humidity test box through a fixer (7), the use method I is adopted;

the first method comprises the following steps:

a) the sensing air guide sleeve (3) is fixed in a working space (82) of the temperature and humidity test box through a fixer (7);

b) one end of the air sampling pipe (5) is hermetically connected with the outer side end of the ventilation interface pipe (3131), and the other end of the air sampling pipe is hermetically connected with the negative pressure port (811) of the ventilation circulating system; the free end of the electric connection part (13) is electrically connected with an electric control system (83) of the temperature and humidity test box, and a ventilation circulating system (81) of the temperature and humidity test box is started;

c) according to the air flow of the air sampling pipe (5) and the requirement of the sensitive element (111) on the wind speed, the combined length of the air flow adjusting pipe (4) and the protective housing (112) is adjusted, so that the wind speed passing through the surface of the sensitive element (111) meets the requirement;

d) air in the working space (82) at the position of the sensing air guide sleeve (3) is sucked from the air vent (321) of the outer cover, sequentially passes through the rectangular air vent (1122), the surface of the sensing element (111), the circular air vent (1121), the air flow adjusting pipe (4), the air vent interface pipe (3131), the air sampling pipe (5) and the negative pressure port (811) of the ventilation circulating system, and finally returns to the working space (82) through the positive pressure port (812) of the ventilation circulating system;

e) starting an electrical control system (83) of the temperature and humidity test box, and collecting the air temperature and humidity of the interest point position in the working space (82);

f) the temperature and humidity control is realized by a temperature and humidity control algorithm through an electrical control system (83) of the temperature and humidity test box according to the air temperature and humidity;

when the sensing air guide sleeve (3) is fixed in the external space of the temperature and humidity test box through the fixer (7), the use method II comprises the following steps:

the second method comprises the following steps:

a) the sensing air guide sleeve (3) is fixed in the external space of the temperature and humidity test box through a fixer (7);

b) one end of the air sampling pipe (5) is hermetically connected with the outer side end of the ventilation interface pipe (3131), and the other end of the air sampling pipe is hermetically connected with a positive pressure port (812) of the ventilation circulation system; the free end of the electric connection part (13) is electrically connected with an electric control system (83) of the temperature and humidity test box, and a ventilation circulating system (81) of the temperature and humidity test box is started;

d) air in the working space (82) at the negative pressure port (811) of the ventilation circulating system is sucked from the negative pressure port (811) of the ventilation circulating system, passes through the positive pressure port (812) of the ventilation circulating system, the air sampling pipe (5), the ventilation interface pipe (3131), the air flow adjusting pipe (4), the circular vent hole (1121), the surface of the sensitive element (111) and the rectangular vent hole (1122) in sequence, and is released to the external space of the temperature and humidity test box through the vent hole (321) of the outer cover;

e) starting an electrical control system (83) of the temperature and humidity test box, and collecting the air temperature and humidity at a negative pressure port (811) of the ventilation circulation system;

f) the temperature and humidity control is realized by the temperature and humidity control algorithm through the temperature and humidity control system (83) of the temperature and humidity test box according to the air temperature and humidity.

9. Method for temperature and humidity acquisition and control using a temperature and humidity test chamber according to claim 6 or 7, characterized in that:

the method comprises a third method and a fourth method:

when the sensing air guide sleeve (3) is fixed at any interest point position of a partition plate, a side plate, a top plate or a bottom plate in a working space (82) of the temperature and humidity test box through a fixer (7), the use method is three;

the third method comprises the following steps:

a) fixing the sensing air guide sleeve (3) in a working space (82) of a temperature and humidity test box through a fixer (7);

b) the free end of the electric connection part (13) is electrically connected with an electric control system (83) of the temperature and humidity test box, and the electric control system (83) of the temperature and humidity test box and the micro fan (9) are started;

c) according to the air flow of the micro fan (9) and the requirement of the sensitive element (111) on the wind speed, the combined length of the air flow adjusting pipe (4) and the protective housing (112) is adjusted, so that the wind speed passing through the surface of the sensitive element (111) meets the requirement;

d) air in the working space (82) at the position of the sensing air guide sleeve (3) is sucked from the ventilating interface tube (3131), sequentially passes through the air flow adjusting tube (4), the circular ventilating hole (1121), the surface of the sensitive element (111), the rectangular ventilating hole (1122), the air hole (321) of the outer cover and the micro fan negative pressure port (91), and finally returns to the working space (82) through the micro fan positive pressure port (92);

when the sensing air guide sleeve (3) is fixed in the external space of the temperature and humidity test box through the fixer (7), the use method is four;

the method IV comprises the following steps:

b) one end of the air sampling pipe (5) is hermetically connected with the outer side end of the ventilation interface pipe (3131), and the other end of the air sampling pipe is hermetically connected with the negative pressure port (811) of the ventilation circulating system; the free end of the electric connection part (13) is electrically connected with an electric control system (83) of the temperature and humidity test box, and the electric control system (83) of the temperature and humidity test box and the micro fan (9) are started;

d) air in the working space (82) at the negative pressure port (811) of the ventilation circulation system is sucked from the negative pressure port (811) of the ventilation circulation system, sequentially passes through the air sampling pipe (5), the ventilation interface pipe (3131), the air flow adjusting pipe (4), the circular vent hole (1121), the surface of the sensitive element (111), the rectangular vent hole (1122), the vent hole (321) of the outer cover and the negative pressure port (91) of the micro fan, and is finally released to the external space of the temperature and humidity test box through the positive pressure port (92) of the micro fan;

e) starting an electrical control system (83) of the temperature and humidity test box, and collecting the air temperature and humidity of a working space (82) at a negative pressure port (811) of a ventilation circulation system;