CN111468195A - Constant temperature and humidity equipment for low air pressure - Google Patents

Abstract

The invention relates to the technical field of constant temperature equipment, and particularly discloses constant temperature and humidity equipment with available low air pressure, which comprises: the pressure-bearing heat insulation box is internally provided with a pressure-bearing test cavity; the pipe network is fixedly arranged on at least one cavity wall of the pressure-bearing test cavity and used for transmitting cold and hot fluid working media; the inlet and the outlet of the conduit pipe network are communicated through the heating/cooling device, and the heating/cooling device is used for heating or cooling the cold and hot fluid working medium; and the driving pump is positioned between the conduit pipe network and the heating/cooling device and is used for driving the cold and hot fluid working media to flow. The invention provides constant temperature and humidity equipment available for low air pressure, which can solve the problem that the temperature uniformity in a traditional constant temperature box is unstable when a low air pressure test is carried out.

Description

Constant temperature and humidity equipment for low air pressure

technical field

The invention relates to the technical field of constant temperature equipment, in particular to a constant temperature and humidity equipment that can be used with low air pressure.

Background technique

Many workpieces or electronic components need to be tested at a constant temperature before the test object is used. As shown in Figure 1, an evaporator 2, a heater 3 and a fan 4 are arranged in the box of the traditional incubator 1. When testing is required, the evaporation The heater 2 and the heater 3 work together to keep the temperature in the box constant, and the fan 4 is mainly used to speed up the flow rate of the airflow 5 in the box to make the temperature in the box uniform.

The problems with traditional incubators are:

When a low-pressure constant temperature test is required, the space in the box needs to be evacuated. After the air in the box becomes thin, the fan cannot form a high-speed air flow in the box. The evaporator currently used in the box is air-cooled. type equipment, the heater currently used is an air-heat type equipment, once there is a lack of high-speed moving airflow, the cold energy released by the evaporator 2 and the heat energy released by the heater 3 are difficult to efficiently transfer into the box, which is easy to cause freezing or icing. Dry burning at over-temperature, which results in the termination of the test, or the effect of the constant temperature in the box is greatly reduced.

Therefore, it is necessary to improve the traditional incubator to solve the problem that the temperature uniformity in the box is unstable or the test cannot be carried out during the low-pressure test.

SUMMARY OF THE INVENTION

One object of the present invention is to provide a constant temperature and humidity device that can be used at low pressure, which can solve the problems of unstable temperature uniformity or inability to perform the test when the traditional constant temperature box performs a low pressure test.

In order to achieve the above purpose, the present invention provides a low-pressure available constant temperature and humidity equipment, including:

a pressure-bearing incubator, wherein a pressure-bearing test cavity is arranged inside the pressure-bearing incubator;

A conduit pipe network, the conduit pipe network is fixed on at least one cavity wall of the pressure-bearing test chamber, and the conduit pipe network is used to transmit cold and hot fluid working medium, and the cold and hot fluid working medium maintains pressure through flow conduction temperature The temperature of the test chamber is stable;

a heating/cooling device, the inlet and the outlet of the conduit pipe network are communicated through the heating/cooling device, and the heating/cooling device is used for heating or cooling the cold and hot fluid working medium;

a driving pump, the driving pump is located between the conduit pipe network and the heating/cooling device, and is used for driving the cold and hot fluid working medium to flow.

Preferably, each cavity wall of the pressure-bearing test cavity is provided with the conduit pipe network, and the conduit pipe networks on each cavity wall communicate with each other.

Preferably, a fan, a heater and an evaporator are further provided in the pressure test chamber.

Preferably, the fan has a unidirectional air outlet structure, the heater is located on the air inlet side of the fan, and the evaporator is located on the air outlet side of the fan.

Preferably, the fan has a bidirectional air outlet structure;

The heater includes a first heating unit and a second heating unit separated from each other, the fan is located between the first heating unit and the second heating unit, and the evaporator is located in the second heating unit away from the side of the fan.

Preferably, the fan is a transverse air outlet structure;

The heater includes a third heating unit and a fourth heating unit located below the third heating unit, and the fan is located between the third heating unit and the fourth heating unit;

the evaporator includes a first evaporation unit located above the third heating unit and a second evaporation unit located below the fourth heating unit;

The fan is used to drive the airflow in the pressure-bearing test chamber to form an upper circulation flow through the fan, the first evaporator and the third heater in sequence, and a lower circulation flow through the fan, the second evaporator and the fourth heater in sequence.

Preferably, it also includes a vacuum tube whose one end is communicated with the pressure-bearing test chamber, and the other end of the vacuum tube is sequentially connected with an electric valve, an air condensation drying device and a vacuum pump.

Preferably, it also includes a humidification pipe whose one end is communicated with the pressure-bearing test chamber, and the humidification system is communicated with the other end of the humidification pipe.

Preferably, the pressure-bearing thermal insulation box comprises a box body with an opening structure on one side and a box door hinged to the opening of the box body;

One end of the conduit pipe network fixed at the box door close to the hinge is communicated with one end of the conduit pipe network fixed at the box main body close to the hinge through a hose.

Preferably, the pressure-bearing thermal insulation box includes an inner wall of the thermal insulation box, an outer wall of the thermal insulation box, and a thermal insulation cotton between the inner wall of the thermal insulation box and the outer wall of the thermal insulation box.

The beneficial effects of the present invention are: to provide a constant temperature and humidity equipment that can be used with low air pressure, when a low pressure occurs in the pressure test chamber, a heating/cooling device is used to heat or cool the cold and hot fluid working medium to a preset temperature, and then drive The pump transmits the cold and hot fluid working medium into the conduit pipe network, and the conduit pipe network emits heat to the pressure test chamber in the form of heat radiation in the pressure test chamber. In the environment, the conduit pipe network can still output heat to the pressure test chamber stably, so as to ensure the constant temperature of the pressure test chamber, which is conducive to the normal operation of the test.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is the structural representation of the traditional incubator provided by the background technology;

Fig. 2 is the side structure schematic diagram of the constant temperature and humidity equipment available for low air pressure provided by the embodiment;

3 is a schematic side structure diagram of another constant temperature and humidity device that can be used with low air pressure according to the embodiment;

4 is a schematic side structure diagram of another constant temperature and humidity device that can be used with low air pressure according to the embodiment;

FIG. 5 is a schematic diagram of the front structure of the constant temperature and humidity equipment that can be used for low air pressure after hiding the box door provided by the embodiment.

In the picture:

1. Traditional incubator;

2. Evaporator; 201, first evaporation unit; 202, second evaporation unit;

3. heater; 301, first heating unit; 302, second heating unit; 303, third heating unit; 304, fourth heating unit;

4. Fan;

5. Air flow; 501, upper circulation; 502, lower circulation;

601, pressure test chamber; 602, box body; 603, box door; 604, insulation box inner wall; 605, insulation box outer wall; 606, insulation cotton;

7. Conduit pipe network;

8. Heating/cooling device;

9. Drive the pump;

10. Vacuum tube;

11. Electric valve;

12. Air condensation drying device;

13. Vacuum pump;

14. Humidification tube;

15. Humidification system;

16. Hose.

Detailed ways

In order to make the purposes, features and advantages of the present invention more obvious and understandable, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the following description The embodiments described above are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be co-located components at the same time. When a component is considered to be "set on" another component, it can be set directly on the other component or there may be a centered set of components at the same time.

In addition, the terms "long", "short", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present invention, rather than indicating or implying the referred device. Or the original must have this specific orientation and operate in a specific orientation configuration, which should not be construed as a limitation of the present invention.

The technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

Referring to FIG. 2 , the present embodiment provides a constant temperature and humidity equipment that can be used with low air pressure, including a pressure-bearing incubator, a conduit pipe network 7 , a heating/cooling device 8 and a driving pump 9 . A pressure-bearing test cavity 601 is provided inside the pressure-bearing incubator. At least one cavity wall of the pressure-bearing test chamber 601 is fixed with the conduit pipe network 7, and the conduit pipe network 7 is used to transmit the cold and hot fluid working medium, and the cold and hot fluid working medium maintains the pressure test through the flow conduction temperature. Cavity 601 is stable in temperature. The inlet and outlet of the conduit pipe network 7 are communicated through the heating/cooling device 8, and the heating/cooling device 8 is used to heat or cool the cold and hot fluid working medium. The driving pump 9 is located between the conduit pipe network 7 and the heating/cooling device 8, and is used for driving the cold and hot fluid working medium to flow.

Optionally, the heating/cooling device 8 can be water or oil, preferably, oil with a larger specific heat capacity can reduce the temperature difference between the inlet and outlet of the conduit pipe network 7, thereby increasing the temperature in the test chamber. stability.

In the constant temperature and humidity equipment that can be used for low air pressure provided in this embodiment, when a low pressure occurs in the pressure test chamber 601, the heating/cooling device 8 is used to heat or cool the hot and cold fluid working medium to a preset temperature, and then the pump 9 is driven to The cold and hot fluid working medium is sent into the conduit pipe network 7, and the conduit pipe network 7 emits heat to the pressure test chamber 601 in the form of heat radiation in the pressure test chamber 601. Since the heat radiation does not require the airflow 5 as a heat conduction medium, therefore, Even in a low-pressure environment, the conduit pipe network 7 can still output heat to the pressure-bearing test chamber 601 stably, thereby ensuring a constant temperature of the pressure-bearing test chamber 601 .

Preferably, each cavity wall of the pressure-bearing test cavity 601 is provided with the conduit pipe network 7, and the conduit pipe network 7 on each cavity wall communicates with each other.

Specifically, arranging a conduit pipe network 7 on each cavity wall can improve the uniformity of the temperature field in the pressure test cavity 601 , which is beneficial to ensure that the temperatures in the pressure test cavity 601 are basically the same.

In this embodiment, the pressure-bearing heat preservation box includes a box body 602 with an opening on one side and a box door 603 hinged to the opening of the box body 602 . One end of the conduit pipe network 7 fixed at the box door 603 near the hinge is communicated with one end of the conduit pipe network 7 fixed at the box main body 602 near the hinge through the hose 16 .

Specifically, the hose 16 has strong deformability and can be deformed with the hinge movement at the hinge to keep the conduit network 7 at the box door 603 and the conduit network 7 at the box body 602 connected to each other. Further, by arranging the hose 16 at the hinged end, the problem of blocking the door opening and closing that may be caused by arranging the hose 16 at the other end can be effectively avoided.

Preferably, the pressure-bearing incubator includes an inner wall 604 of the incubator, an outer wall 605 of the incubator, and a thermal insulation cotton 606 between the inner wall 604 of the incubator and the outer wall 605 of the incubator.

Specifically, the thermal insulation cotton 606 can play a role of thermal insulation, further improving the temperature stability of the pressure-bearing test chamber 601 .

In this embodiment, a fan 4 , a heater 3 and an evaporator 2 are further provided in the pressure test chamber 601 .

Specifically, when the low-pressure test is not carried out, the conventional constant temperature test can be conveniently carried out by setting the fan 4, the heater 3 and the evaporator 2, that is, the evaporator 2 and the heater 3 work together to keep the temperature in the box constant, The fan 4 is mainly used to speed up the flow rate of the airflow 5 in the box, so that the temperature in the box becomes uniform.

Optionally, referring to FIG. 2 , the fan 4 is of a unidirectional air outlet structure, the heater 3 is located on the air inlet side of the fan 4 , and the evaporator 2 is located on the air outlet side of the fan 4 . For example, the blower 4 is unidirectional downwards, the heater 3 is located above the blower 4 , and the evaporator 2 is located below the blower 4 . Such a structure arrangement is conducive to the formation of a circulating air flow 5 with a stable temperature in the pressure-bearing test chamber 601 .

Of course, referring to FIG. 3 , the fan 4 can also be a bidirectional air outlet structure; the heater 3 includes a first heating unit 301 and a second heating unit 302 that are separated from each other, and the fan 4 is located in the first heating unit 301 and the second heating unit 302 . Between the unit 301 and the second heating unit 302 , the evaporator 2 is located on the side of the second heating unit 302 away from the fan 4 . For example, when the fan 4 blows downward, the first heating unit 301 works and the second heating unit 302 does not work, then the first heating unit 301 , the fan 4 and the evaporator 2 can be formed in the pressure test chamber 601 A counterclockwise circulating airflow 5 . Alternatively, when the fan 4 is blowing upward, the first heating unit 301 does not work and the second heating unit 302 works, then the second heating unit 302 , the fan 4 and the evaporator 2 can form a space in the pressure test chamber 601 . Clockwise circulating airflow 5. Therefore, clockwise and counterclockwise airflow 5 can be realized by using one fan 4 with two-way air outlet, one evaporator 2 and two heating units, compared to the existing one using two fans 4 and two evaporators 2 The solution has the advantages of simple structure and low cost.

Alternatively, referring to FIG. 4 , the fan 4 is of a lateral air outlet structure; the heater 3 includes a third heating unit 303 and a fourth heating unit 304 located below the third heating unit 303 , and the fan 4 is located at the between the third heating unit 303 and the fourth heating unit 304 . The evaporator 2 includes a first evaporation unit 201 located above the third heating unit 303 and a second evaporation unit 202 located below the fourth heating unit 304 . The fan 4 is used to drive the air flow 5 in the pressure-bearing test chamber 601 to form an upper circulation 501 passing through the fan 4, the first evaporator 2 and the third heater 3 in sequence, and passing through the fan 4 and the second evaporator 2 in sequence. and the lower circulation 502 of the fourth heater 3 . Specifically, the flow mode of the airflow 5 of the double circulation can enhance the uniformity of the temperature field in the pressure-bearing test chamber 601 and improve the experimental effect.

Referring to FIG. 5 , the constant temperature and humidity equipment available for low air pressure also includes a vacuum tube 10 whose one end is communicated with the pressure-bearing test chamber 601 , and the other end of the vacuum tube 10 is sequentially connected with an electric valve 11 , an air condensation drying device 12 and a vacuum pump 13 .

It can be understood that when a low-pressure test needs to be performed, it is necessary to open the electric valve 11 and turn on the vacuum pump 13. Since the air in the pressure-bearing test chamber 601 has a certain humidity, in order to prevent the vacuum pump 13 from being damaged, the air is set before the vacuum pump 13. Condensation drying device 12 .

Optionally, the low-pressure-available constant temperature and humidity equipment further includes a humidification pipe 14 whose one end is in communication with the pressure-bearing test chamber 601 , and the humidification system 15 is communicated with the other end of the humidification pipe 14 .

Specifically, after the humidification pipe 14 and the humidification system 15 are added, the humidity in the test chamber can also be adjusted.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The recorded technical solutions are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. a low-pressure available constant temperature and humidity equipment, is characterized in that, comprises: a pressure-bearing incubator (1), wherein a pressure-bearing test cavity (601) is provided inside the pressure-bearing incubator (1); A conduit pipe network (7), at least one cavity wall of the pressure-bearing test chamber is fixedly provided with the conduit pipe network (7), and the conduit pipe network (7) is used to transmit cold and hot fluid working medium, cold and hot fluid The working fluid keeps the temperature of the pressure test chamber (601) stable through the flow conduction temperature; A heating/cooling device (8), the inlet and outlet of the conduit pipe network (7) are communicated through the heating/cooling device (8), and the heating/cooling device (8) is used for heating or cooling the cold and hot fluid working medium; A driving pump (9), which is located between the conduit pipe network and the heating/cooling device (8), is used for driving the cold and hot fluid working medium to flow. 2. The constant temperature and humidity equipment available for low air pressure according to claim 1, wherein each cavity wall of the pressure-bearing test cavity (601) is provided with the conduit pipe network (7), and each cavity is provided with the conduit pipe network (7). Said network of conduits on the wall communicate with each other. 3 . The constant temperature and humidity equipment available for low air pressure according to claim 1 , wherein a fan ( 4 ), a heater ( 3 ) and an evaporator ( 2 ) are further provided in the pressure-bearing test chamber. 4 . 4. The low-pressure available constant temperature and humidity equipment according to claim 3, wherein the fan is a one-way air outlet structure, the heater (3) is located on the air inlet side of the fan, and the fan is The evaporator (2) is located on the air outlet side of the fan. 5. The available constant temperature and humidity equipment for low air pressure according to claim 3, wherein the fan is a bidirectional air outlet structure; The heater includes a first heating unit and a second heating unit separated from each other, the fan is located between the first heating unit and the second heating unit, and the evaporator (2) is located in the second heating unit The side away from the fan. 6. The available constant temperature and humidity equipment for low air pressure according to claim 3, wherein the fan is a transverse air outlet structure; The heater (3) includes a third heating unit and a fourth heating unit located below the third heating unit, and the fan is located between the third heating unit and the fourth heating unit; The evaporator (2) comprises a first evaporation unit located above the third heating unit and a second evaporation unit located below the fourth heating unit; The fan (4) is used to drive the air flow in the pressure-bearing test chamber to form an upper circulation flow through the fan, the first evaporator and the third heater in sequence, and an upper circulation flow through the fan, the second evaporator and the fourth heater in sequence. lower circulation. 7. The constant temperature and humidity equipment available for low air pressure according to claim 1, further comprising a vacuum tube (10) whose one end is communicated with the pressure-bearing test chamber, and the other end of the vacuum tube (10) is communicated in turn There are electric valve (11), air condensation drying device (12) and vacuum pump (13). 8 . The constant temperature and humidity equipment available for low air pressure according to claim 1 , further comprising a humidification pipe having one end communicated with the pressure-bearing test chamber ( 601 ), and a humidification pipe is communicated with the other end of the humidification pipe. 9 . system (15). 9 . The constant temperature and humidity equipment available for low air pressure according to claim 1 , wherein the pressure-bearing thermal insulation box comprises a box body with an opening structure on one side and a box door ( 603); One end of the conduit pipe network (7) fixed at the box door (603) near the hinge is communicated with one end of the conduit pipe network fixed at the box body near the hinge through a hose (16). 10. The constant temperature and humidity equipment available for low air pressure according to claim 1, wherein the pressure-bearing incubator comprises an inner wall of the incubator (604), an outer wall of the incubator (605), and an inner wall of the incubator (604). 604) and the insulation cotton (606) between the outer wall (605) of the incubator.

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