CN111889147B - High-low temperature test box - Google Patents
High-low temperature test box Download PDFInfo
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- CN111889147B CN111889147B CN202010767572.8A CN202010767572A CN111889147B CN 111889147 B CN111889147 B CN 111889147B CN 202010767572 A CN202010767572 A CN 202010767572A CN 111889147 B CN111889147 B CN 111889147B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L1/00—Enclosures; Chambers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
Abstract
The invention relates to a high-low temperature test box, and discloses a high-low temperature test box which comprises a test box body, wherein a power box and a test box are arranged in the test box body, a heat insulation layer is arranged on the inner wall of the test box, a control system, a refrigerating system, a heating system and a humidifying system are arranged in the power box, a liquid tank is arranged in the power box, the refrigerating system and the heating system are both connected with the liquid tank, the liquid tank is provided with a liquid outlet pipe and a liquid inlet pipe, a water pump is arranged on the liquid outlet pipe, a circulating heat dissipation assembly is arranged on the inner wall of the test box, and the circulating heat dissipation assembly is communicated with the liquid outlet pipe and the liquid inlet pipe through a pipeline. The high-low temperature test chamber provided by the invention can quickly change the temperature in the test chamber, and the temperature in the test chamber is constant and uniform in distribution, high in precision and convenient for object detection.
Description
Technical Field
The invention relates to the field of detection equipment, in particular to a high-low temperature test box.
Background
With the improvement of the quality requirement of industrial products, the produced products are required to be subjected to simulation tests before being put into the market, and the tests are required to be capable of completely and truly simulating the real conditions of the products in the using process. The high-low temperature test box is widely applied to chemical, biological and physical laboratories, such as laboratories in medicine and health, chemical industry, genetic engineering, polymer engineering and the like, and mainly used for performing performance test on high-low temperature environments of products so as to test the reliability of the products in different temperature environments.
In the patent publication No. CN104107731B entitled "temperature test chamber heated by liquid and constant temperature", a structural design is provided for heating and keeping air constant temperature by liquid in a liquid constant temperature tank, the temperature stability and uniformity of the temperature can reach the levels of +/-0.05 ℃ and 0.1 ℃ respectively in the temperature range of-70 ℃ to 300 ℃, and the temperature stability and uniformity are improved, thereby improving the quality of temperature environment test. However, the liquid thermostatic bath is arranged on one side of the box body, and then the whole metal plate heats and keeps the air constant, obviously, the design mode on one side of the metal plate enables the heat exchange between the metal plate and the air in the box body to be uneven, the temperature close to one side of the metal plate in the box body is higher, the temperature far away from one side of the metal plate is lower, the heat exchange efficiency between the metal plate and the air is low, when the temperature in the test box needs to be changed, the temperature can be changed within a long time, and the heat exchange is not changed for daily use.
The present application is made in view of this feature.
Disclosure of Invention
The invention aims to provide a high-low temperature test box, which is uniform and constant in temperature and can quickly change the temperature in the test box.
The embodiment of the invention is realized by the following technical scheme: the high-low temperature test box comprises a test box body, wherein a power box and a test box are arranged in the test box body, a heat preservation layer is arranged on the inner wall of the test box, a control system, a refrigerating system, a heating system and a humidifying system are arranged in the power box, a liquid tank is arranged in the power box, the refrigerating system and the heating system are both connected with the liquid tank, the liquid tank is provided with a liquid outlet pipe and a liquid inlet pipe, a water pump is arranged on the liquid outlet pipe, a circulating heat dissipation assembly is arranged on the inner wall of the test box, and the circulating heat dissipation assembly is communicated with the liquid outlet pipe and the liquid inlet pipe through a pipeline.
Furthermore, the circulation heat dissipation assembly comprises a heat dissipation pipe coiled on the inner wall of the testing box, the heat dissipation pipe is communicated with the liquid outlet pipe, and the other end of the heat dissipation pipe is communicated with the liquid inlet pipe.
Furthermore, a plurality of radiating fins are inserted between the radiating pipes, and radiating cavities are formed between adjacent radiating fins.
Furthermore, a heat radiation fan is arranged between the circulating heat radiation component and the inner wall of the test box.
Further, the material of the radiating pipe and the radiating fin is red copper.
Furthermore, an air duct partition plate is further arranged on the side wall, close to the circulating heat dissipation assembly, of the testing box, a through hole used for installing the circulating heat dissipation assembly is formed in the air duct partition plate, the circulating heat dissipation assembly is installed on the through hole, and an air duct is formed between the air duct partition plate and the inner wall of the testing box.
Furthermore, an air duct is further arranged between the circulating heat dissipation assembly and the inner wall of the testing box, a plurality of vent holes are formed in the side wall of the air duct, one side, close to the circulating heat dissipation assembly, of the air duct is covered on the edge of the circulating heat dissipation assembly, the other side of the air duct is fixedly connected with the side wall of the testing box, the heat dissipation fan is arranged in the middle of the inner portion of the air duct, and an air equalizing plate is arranged on the inner wall, close to the circulating heat dissipation assembly, of the air duct.
Further, cooling fan is including setting up the driving motor on the test case outer wall, and the driving motor drive shaft runs through test case lateral wall and heat preservation and disposes several and rotate the impeller.
Furthermore, an attached liquid tank is further arranged in the power box and communicated with the liquid tank, the liquid inlet pipe is connected with the attached liquid tank, and a water pump is arranged on the liquid outlet pipe.
Further, the liquid tank and the bottom of the liquid attaching tank are communicated through a U-shaped pipe.
The invention has the beneficial effects that:
(1) the invention solves the problem of rapid temperature change in the test box by arranging the circulating heat radiation assembly and the heat radiation fan, transmits the liquid medium in the liquid tank to the heat radiation pipe of the circulating heat radiation assembly through the water pump, and then exchanges heat with air in the test box through the heat radiation pipe, and under the action of the heat radiation fan, the heat exchange efficiency is high, the speed is high, and the temperature stability is high and the precision is high due to the liquid medium.
(2) According to the invention, the air duct partition plate and the air guide cylinder are arranged to guide the air flow, so that the air in the box can flow circularly, the air in the box can quickly exchange heat with the circulating heat dissipation assemblies, the air after heat exchange can be quickly and uniformly distributed in each position in the box, and the two opposite circulating heat dissipation assemblies are arranged, so that the heat exchange of the air in the box is further accelerated, the temperature in the box can be quickly changed, and the convenience is provided for practical use.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the operational state of the present invention;
FIG. 3 is a schematic view of the inside structure of a test chamber in example 1;
FIG. 4 is a schematic view of the inside structure of a test chamber in example 2;
FIG. 5 is a schematic view of the structure in the test chamber in example 3.
Icon: 1-a power box; 2-testing and inspecting the box; 21-an insulating layer; 4-a control system; 5-a refrigeration system; 6-a heating system; 7-a humidification system; 8-a liquid tank; 81-liquid outlet pipe; 82-a liquid inlet pipe; 83-a water pump; 9-circulating heat dissipation components; 91-radiating pipes; 92-a heat sink; 94-a heat dissipation fan; 941 — drive motor; 942-rotating the impeller; 95-an air duct; 951-vent; 952-air equalizing plate; 10-air duct partition board; 11-an air duct; 12-attaching a liquid tank; 13-U shaped tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The terms "parallel", "perpendicular", etc. do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel relative to "perpendicular," and does not mean that the structures are necessarily perfectly parallel, but may be slightly tilted.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1 to 3, the embodiment provides a high and low temperature test box, which includes a test box body, a power box 1 and a test box 2 are arranged in the test box body, the power box 1 includes a temperature control box arranged on a side surface of the test box 2 and a humidity control box arranged at a bottom of the test box 2, an insulating layer 21 is arranged on an inner wall of the test box 2, a control system 4, a refrigeration system 5, a heating system 6 and a humidification system 7 are arranged in the power box 1, the control system 4, the refrigeration system 5 and the heating system 6 are arranged in the temperature control box, the humidification system 7 is arranged in the humidity control box, it is to be noted that the control system 4 includes an operation panel, a control chip and matched sensor modules (a temperature sensor and a humidity sensor), the refrigeration system 5 and the heating system 6 provide a function of raising and lowering temperature in the test box 2, the humidification system 7 provides water vapor to change the humidity in the test box 2, heating system 6, refrigerating system 5 and humidification system 7 all connect control system 4, regulate and control through control system 4 automatic regulation and control heating system 6, refrigerating system 5 and humidification system 7 and survey the temperature and humidity in the case 2. The power box 1 is internally provided with a liquid tank 8, the liquid tank 8 is internally provided with a liquid medium, the refrigerating system 5 and the heating system 6 are both connected with the liquid tank 8 to heat or cool the liquid medium in the liquid tank 8, the liquid tank 8 is provided with a liquid outlet pipe 81 and a liquid inlet pipe 82, the liquid outlet pipe 81 is provided with a water pump 83, the inner wall of the testing box 2 is provided with a circulating heat dissipation assembly 9, and the circulating heat dissipation assemblies 9 can be provided with a plurality of groups; the circulation radiating component 9 is communicated with the liquid outlet pipe 81 and the liquid inlet pipe 82 through a pipeline, under the action of the water pump 83, liquid media in the liquid tank 8 are conveyed to the circulation radiating component 9 from the liquid outlet pipe 81, the circulation radiating component 9 carries out rapid heat exchange on the liquid media and air in the test box 2, so that the temperature in the test box 2 is rapidly increased or decreased to the specified temperature, the liquid has the inherent characteristics of good heat conductivity, large heat capacity and the like, the temperature stability in the test box 2 is good, the temperature control precision is high, and the mode of directly conveying the liquid media to the test box 2 for heat exchange can be realized, the rapid temperature regulation and change in the test box 2 can be realized, and convenience is provided for the temperature measurement of a side object.
Further, this embodiment, circulation radiator unit 9 is including coiling the cooling tube 91 of locating on examining case 2 inner walls, cooling tube 91 one end intercommunication drain pipe 81, other end intercommunication feed liquor pipe 82, and is specific, and cooling tube 91 adopts snakelike coiling setting in this embodiment. The contact area between the radiating pipe 91 and the interior of the test box 2 is increased, and heat exchange is facilitated. Insert between the cooling tube 91 and be equipped with a plurality of fin 92, form the heat dissipation cavity between the adjacent fin 92, preferably, cooling tube 91 and fin 92 material are red copper, have better heat conductivity, realize quick heat dissipation, can carry out quick heat conduction with the liquid temperature in cooling tube 91 through fin 92, and the heat dissipation cavity is convenient for the rapid circulation of air, has improved heat transfer speed.
Further, in order to improve the heat exchange efficiency in the testing box 2, the heat dissipation fan 94 is further arranged between the circulating heat dissipation assembly 9 and the inner wall of the testing box 2, and the heat dissipation fan 94 increases the rapid flow of air in the testing box 2, so that the air in the testing box 2 is rapidly exchanged heat with the circulating heat dissipation assembly 9, and the rapid temperature adjustment in the testing box 2 is facilitated. The cooling fan 94 includes a driving motor 941 disposed on the outer wall of the testing box 2, and a driving shaft of the driving motor 941 penetrates through the side wall of the testing box 2 and the insulating layer 21 and is provided with a plurality of rotating impellers 942. The driving motor 941 is arranged on the outer wall of the testing box 2, so that the influence of the driving motor 941 on the temperature in the testing box 2 is avoided.
In this embodiment, further, an air duct partition plate 10 is further disposed on a side wall of the testing box 2 close to the circulating heat dissipation assembly 9, in this embodiment, as shown in fig. 3, a left end and a right end of the air duct partition plate 10 are respectively connected to inner walls of the testing box 2, an upper end and a lower end of the air duct partition plate are spaced from the testing box 2 to form an air circulation channel, air in the testing box 2 flows into the air duct 11 from the air circulation channel at the upper end and the lower end of the testing box 2, and then air circulation is formed by the heat dissipation fan 94, so that the air flows quickly and conveniently for quick heat exchange, a through hole for mounting the circulating heat dissipation assembly 9 is disposed on the air duct partition plate 10, the circulating heat dissipation assembly 9 is detachably mounted on the through hole, and the air duct 11 is formed between the air duct partition plate 10 and the inner walls of the testing box 2.
In this embodiment, an air duct 95 is further disposed between the circulating heat dissipation assembly 9 and the inner wall of the testing box 2, a plurality of ventilation holes 951 are disposed on a side wall of the air duct 95, one side of the air duct 95 close to the circulating heat dissipation assembly 9 is covered on a side wall of the circulating heat dissipation assembly 9, the other side of the air duct is fixedly connected to the side wall of the testing box 2, the heat dissipation fan 94 is disposed in the middle of the air duct 95, and an air equalizing plate 952 is disposed on the inner wall of the air duct 95 close to the circulating heat dissipation assembly 9. The air duct 95 guides the flowing air generated by the heat dissipation fan 94, and it is assumed that one side of the circulating heat dissipation assembly 9 close to the inner wall of the testing box 2 is the inner side, one side of the circulating heat dissipation assembly 9 far from the inner wall of the testing box 2 is the outer side, in the air duct 95, the air flow generated by the heat dissipation fan 94 flows from the inner side to the outer side, and flows into the heat dissipation cavity after the air flow is homogenized by the air homogenizing plate 952, it should be noted that the length direction of the heat dissipation cavity is the same as the air flow direction and is in a horizontal state, and the air flow is blown into the testing box 2 after rapid heat exchange is performed in the heat dissipation cavity.
In this embodiment, in order to facilitate stable control of the temperature of the liquid tank 8, an additional liquid tank 12 is further disposed in the power box 1, the additional liquid tank 12 is communicated with the liquid tank 8, the liquid inlet pipe 82 is connected to the additional liquid tank 12, and the liquid outlet pipe 81 is connected to the liquid tank 8. The bottom of the liquid tank 8 is communicated with the bottom of the liquid attaching tank 12 through the U-shaped pipe 13, liquid media after heat exchange in the circulating heat dissipation assembly 9 enter the liquid attaching tank 12 from the liquid outlet pipe 81, the liquid media are prevented from directly entering the liquid tank 8 to impact the temperature in the liquid tank 8, inconvenience is brought to constant control of the temperature, the liquid media enter the liquid attaching tank 12, the bottom of the liquid tank 8 is communicated with the bottom of the liquid attaching tank 12 through the U-shaped pipe 13, and automatic feeding of the liquid media in the liquid tank 8 is achieved.
In a specific temperature testing operation, as shown in fig. 2, taking a high temperature test as an example, a tested object is placed into a testing box 2, a box door is closed, a control system 4 controls a heating system 6 to heat a liquid medium in a liquid tank 8 to a specified temperature, then controls a water pump 83 and a driving motor 941 to be opened, under the action of the water pump 83, the liquid medium in the liquid tank 8 flows into a radiating pipe 91 of a circulating radiating assembly 9 from a liquid outlet pipe 81, the driving motor 941 drives a rotating impeller 942 to rotate and blow air into the testing box 2, air flows through an air equalizing plate 952 to perform rapid heat exchange in a radiating cavity, the hot air after heat exchange flows into the testing box 2, the air temperature around the tested object can rapidly reach a required testing temperature, then the air flows upwards or downwards to an air channel, enters an air channel 11 from an air circulation channel, and then enters an air guide cylinder 95 from an air guide hole 951 of the air guide cylinder 95, the quick circulation flow of the air in the test box 2 is realized, the temperature change in the test box 2 is quick, and the constant temperature effect is good in the test box 2 due to liquid heating.
Example 2
Referring to fig. 4 on the basis of embodiment 1, the present embodiment provides a high and low temperature test chamber, which is improved on the basis of embodiment 1, and is characterized in that:
the setting mode of air duct partition board 10 has been changed, and the upper and lower inner wall of survey case 2 is connected respectively at both ends about air duct partition board 10, has certain distance about both ends and in the test case 2, forms the circulation of air passageway, and the circulation of air passageway in test case 2 air from test case 2 about both ends flows into wind channel 11, and rethread radiator fan 94 forms air cycle.
Example 3
Referring to fig. 5 on the basis of example 1, the present embodiment provides a high and low temperature test chamber, which is improved on the basis of example 1, with the difference that:
the setting mode of air duct partition board 10 has been changed, and air duct partition board 10 passes through the leg joint and examines 2 inner walls of case, and air duct partition board 10 left and right sides, upper and lower both ends all have certain distance with test case 2 in, form the circulation of air passageway, and the circulation of air passageway in test case 2 air from test case 2 left and right sides both ends flows into wind channel 11, and rethread radiator fan 94 forms air cycle.
In summary, the invention provides a high-low temperature test chamber, and the circulating heat dissipation assembly and the heat dissipation fan are arranged, so that the temperature in the test chamber is rapidly changed, and the temperature distribution in the test chamber is uniform and constant.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A high-low temperature test box comprises a test box body, wherein a power box and a test box are arranged in the test box body, a heat insulation layer is arranged on the inner wall of the test box, a control system, a refrigerating system, a heating system and a humidifying system are arranged in the power box, and the high-low temperature test box is characterized in that a liquid tank is arranged in the power box, the refrigerating system and the heating system are both connected with the liquid tank, the liquid tank is provided with a liquid outlet pipe and a liquid inlet pipe, a water pump is arranged on the liquid outlet pipe, a circulating heat dissipation assembly is arranged on the inner wall of the test box, and the circulating heat dissipation assembly is communicated with the liquid outlet pipe and the liquid inlet pipe through a pipeline;
the circulating heat dissipation assembly comprises a heat dissipation pipe coiled on the inner wall of the testing box, the heat dissipation pipe is communicated with the liquid outlet pipe, and the other end of the heat dissipation pipe is communicated with the liquid inlet pipe; a plurality of radiating fins are inserted between the radiating tubes, and radiating cavities are formed between adjacent radiating fins; an air duct partition plate is further arranged on the side wall, close to the circulating heat dissipation assembly, of the test box, a through hole for mounting the circulating heat dissipation assembly is formed in the air duct partition plate, the circulating heat dissipation assembly is mounted on the through hole, and an air duct is formed between the air duct partition plate and the inner wall of the test box;
the left end and the right end of the air duct partition plate are respectively connected with the inner wall of the testing box, and the upper end and the lower end of the air duct partition plate are at a certain distance from the inner wall of the testing box; or the upper end and the lower end of the air duct partition plate are respectively connected with the upper inner wall and the lower inner wall of the test box, and the left end and the right end have certain distance with the inner wall of the test box; or the air duct partition board is connected with the inner wall of the testing box through a bracket, and the left end, the right end, the upper end and the lower end of the air duct partition board are respectively provided with a certain distance from the inside of the testing box;
an air duct is further arranged between the circulating heat dissipation assembly and the inner wall of the testing box, a plurality of vent holes are formed in the side wall of the air duct, one side, close to the circulating heat dissipation assembly, of the air duct is covered on the edge of the circulating heat dissipation assembly, the other side of the air duct is fixedly connected with the side wall of the testing box, the heat dissipation fan is arranged in the middle of the inner portion of the air duct, and an air equalizing plate is arranged on the inner wall, close to the circulating heat dissipation assembly, of the air duct;
and a heat radiation fan is also arranged between the circulating heat radiation component and the inner wall of the test box.
2. A high and low temperature test chamber as claimed in claim 1, wherein said radiator pipe and radiator fin material is copper.
3. The high-low temperature test chamber as claimed in claim 1, wherein the heat dissipation fan comprises a driving motor disposed on the outer wall of the test chamber, a driving shaft of the driving motor penetrates through the side wall and the insulating layer of the test chamber and is provided with a plurality of rotating impellers.
4. The high and low temperature test chamber according to claim 1, wherein an attached liquid tank is further arranged in the power chamber, the attached liquid tank is communicated with the liquid tank, the liquid inlet pipe is connected with the attached liquid tank, and a water pump is arranged on the liquid outlet pipe.
5. A high-low temperature test chamber as claimed in claim 4, wherein the liquid tank and the liquid attached tank are communicated with each other at the bottom through a U-shaped pipe.
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| CN202010767572.8A CN111889147B (en) | 2020-08-03 | 2020-08-03 | High-low temperature test box |
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| CN202010767572.8A CN111889147B (en) | 2020-08-03 | 2020-08-03 | High-low temperature test box |
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| CN111889147B true CN111889147B (en) | 2022-04-08 |
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| CN114489187B (en) * | 2021-12-30 | 2023-06-16 | 中航华东光电有限公司 | Temperature control method and system for rapid temperature change test box |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357914A (en) * | 1978-11-16 | 1982-11-09 | Suddeutsche Kuhlerfabrik, Julius Fr. Behr Gmbh & Co. Kg | Cooling system for internal combustion engines |
| CN205869678U (en) * | 2016-06-22 | 2017-01-11 | 浙江开泰新能源科技有限公司 | Heat radiation structure of electric welding |
| CN206474184U (en) * | 2017-01-24 | 2017-09-08 | 东莞市环测检测设备有限公司 | The quick temperature of high/low temperature becomes moisture-heat test-box |
| CN108704675A (en) * | 2018-07-02 | 2018-10-26 | 苏州市计量测试院 | A kind of air themperature chamber |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209222153U (en) * | 2018-12-10 | 2019-08-09 | 重庆英博实验仪器有限公司 | A kind of high-temperature test chamber air-supply structure |
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2020
- 2020-08-03 CN CN202010767572.8A patent/CN111889147B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357914A (en) * | 1978-11-16 | 1982-11-09 | Suddeutsche Kuhlerfabrik, Julius Fr. Behr Gmbh & Co. Kg | Cooling system for internal combustion engines |
| CN205869678U (en) * | 2016-06-22 | 2017-01-11 | 浙江开泰新能源科技有限公司 | Heat radiation structure of electric welding |
| CN206474184U (en) * | 2017-01-24 | 2017-09-08 | 东莞市环测检测设备有限公司 | The quick temperature of high/low temperature becomes moisture-heat test-box |
| CN108704675A (en) * | 2018-07-02 | 2018-10-26 | 苏州市计量测试院 | A kind of air themperature chamber |
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