CN115265234B

CN115265234B - Environment test equipment and heat exchange device

Info

Publication number: CN115265234B
Application number: CN202210722368.3A
Authority: CN
Inventors: 戴磊; 江志炜; 徐铭利; 叶嘉俊; 胡杰锋; 郑昆
Original assignee: Guangzhou Wusuo Environmental Equipment Co ltd
Current assignee: Guangzhou Wusuo Environmental Equipment Co ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2023-05-16
Anticipated expiration: 2042-06-24
Also published as: CN115265234A

Abstract

The invention provides environment testing equipment and a heat exchange device. Wherein, the body is equipped with and holds chamber, first air inlet, first gas outlet, second air inlet and second gas outlet, and first air inlet, hold chamber and first gas outlet intercommunication in proper order. The heat exchange piece sets up in holding the intracavity, and the heat exchange piece is equipped with the heat transfer passageway that has first end and second end, and first end and second air inlet intercommunication, second end and second gas outlet intercommunication for heat transfer medium in the heat transfer passageway can carry out the heat transfer with the heat transfer medium that holds the intracavity. According to the heat exchange device, the low-temperature low-pressure heat exchange medium output by the evaporator is fully utilized, so that the heat exchange device can exchange heat with the high-temperature high-pressure heat exchange medium, and the low-temperature high-pressure heat exchange medium and the precooling device are not required to be additionally utilized to reduce the temperature of the heat exchange medium input into the plate heat exchanger, so that the complexity and the production cost of the environment testing equipment are reduced, and the refrigerating performance of the environment testing equipment is improved.

Description

Environment test equipment and heat exchange device

Technical Field

The invention relates to the field of refrigeration, in particular to environment testing equipment and a heat exchange device.

Background

At present, water-cooled condensers in the industry mainly comprise shell-and-tube condensers and plate heat exchangers, wherein the plate heat exchangers are the main stream in the industry. However, under some conditions of low refrigeration demand and low refrigerant flow rates, the plate heat exchanger may experience accelerated corrosion due to localized high temperatures. According to the related data, the corrosion can be accelerated by 1-3 times when the temperature is increased by 10 ℃, but the heat exchange medium entering the plate heat exchanger is not suitable to exceed 80 ℃ in order to ensure the normal service life of the plate heat exchanger, and the exhaust temperature in many working conditions in actual use can exceed 100 ℃. In order to reduce the temperature of heat exchange medium entering the plate heat exchangers, a precooling device is additionally arranged between the plate heat exchangers in the traditional environment testing equipment. However, the precooling apparatus needs to separately introduce a low-temperature high-pressure heat exchange medium (i.e., a low-temperature high-pressure liquid refrigerant), so that the refrigeration performance of the environment testing device is reduced.

Disclosure of Invention

Based on this, it is necessary to provide an environment testing device and a heat exchanging device for solving the problem that the cooling performance of the environment testing device is reduced due to the fact that a low-temperature heat exchanging medium is required to be independently introduced into a pre-cooling device in the conventional environment testing device.

The technical scheme is as follows:

in one aspect, a heat exchange device is provided, applied to environmental test equipment, including:

the body is provided with a containing cavity, a first air inlet, a first air outlet, a second air inlet and a second air outlet, and the first air inlet, the containing cavity and the first air outlet are sequentially communicated; a kind of electronic device with high-pressure air-conditioning system

The heat exchange piece, the heat exchange piece set up in hold the intracavity, the heat exchange piece is equipped with the heat transfer passageway that has first end and second end, first end with the second air inlet intercommunication, the second end with the second gas outlet intercommunication makes heat transfer medium in the heat transfer passageway can with hold the heat transfer medium in the intracavity and exchange heat. The technical scheme is further described as follows:

in one embodiment, the heat exchange device further comprises heat exchange fins fixedly connected with the outer side walls of the heat exchange pieces, so that heat transfer can be conducted between the heat exchange pieces and the heat exchange fins.

In one embodiment, the heat exchange member includes a first straight pipe section provided with a first end, a second straight pipe section provided with a second end, a curved pipe section for connecting the first straight pipe section with the second straight pipe section, and a heat exchange branch pipe, wherein the first straight pipe section and the second straight pipe section are arranged at intervals, the heat exchange branch pipe is arranged between the first straight pipe section and the second straight pipe section, and two ends of the heat exchange branch pipe are correspondingly connected with the first straight pipe section and the second straight pipe section one by one, so that the first straight pipe section, the curved pipe section, the heat exchange branch pipe and the second straight pipe section can be matched to form the heat exchange channel, and the heat exchange fin is fixedly connected with the heat exchange branch pipe, so that heat transfer can be performed between the heat exchange branch pipe and the heat exchange fin.

In one embodiment, the second air inlet and the second air outlet are both disposed between the first air inlet and the first air outlet, and a connecting line between the second air inlet and the second air outlet is perpendicular to a connecting line between the first air inlet and the first air outlet.

In one embodiment, the heat exchange device further comprises a first oil separator arranged in the accommodating cavity, the first oil separator is arranged corresponding to the first air inlet, and the first oil separator is used for separating lubricating oil in the heat exchange medium input into the accommodating cavity.

In one embodiment, the first oil separator comprises a first baffle and a first oil separating filter screen, the first baffle is fixedly connected with the inner side wall of the accommodating cavity, and the first oil separating filter screen is arranged on the first baffle and corresponds to the first air inlet, so that heat exchange medium in the first air inlet can pass through the first oil separating filter screen to be input into the accommodating cavity.

In one embodiment, the first baffle is disposed between the first air inlet and the first air outlet along an axial direction of the body.

In one embodiment, the heat exchange device further comprises an oil return assembly, wherein the oil return assembly is used for discharging the lubricating oil in the accommodating cavity.

In one embodiment, the heat exchange device further comprises a second oil separator arranged in the accommodating cavity, the second oil separator is arranged corresponding to the first air outlet, and the second oil separator is used for separating and outputting lubricating oil in the heat exchange medium of the accommodating cavity.

On the other hand, provide an environmental test equipment, including compressor, plate heat exchanger, evaporimeter and heat transfer device, the compressor, first air inlet, hold the chamber, first gas outlet, plate heat exchanger, the evaporimeter, the second air inlet heat transfer passageway reaches the second gas outlet can communicate in proper order and form airtight cavity.

When the environment testing device and the heat exchange device are used, the high-temperature and high-pressure heat exchange medium output by the compressor is input into the first air inlet, and the low-temperature and low-pressure heat exchange medium output by the evaporator is input into the second air inlet, so that heat exchange can be performed between the high-temperature and high-pressure heat exchange medium in the accommodating cavity and the low-temperature and low-pressure heat exchange medium in the heat exchange channel through the heat exchange piece, the temperature of the heat exchange medium output from the first air outlet and the heat exchange medium input into the plate heat exchanger is reduced, the corrosion speed of the plate heat exchanger is reduced, the service lives of the environment testing device and the plate heat exchanger are prolonged, the temperature of the heat exchange medium output from the second air outlet and the heat exchange medium input into the compressor are increased, frosting of the compressor is avoided, and the performance of the environment testing device and the compressor is improved. Compared with the traditional precooling device, the low-temperature low-pressure heat exchange medium output by the evaporator is fully utilized, so that the low-temperature low-pressure heat exchange medium can exchange heat with the high-temperature high-pressure heat exchange medium input into the plate heat exchanger through the heat exchange device, and the low-temperature high-pressure heat exchange medium and the precooling device are not required to be additionally utilized to reduce the temperature of the heat exchange medium input into the plate heat exchanger, the complexity and the production cost of the environment testing equipment are reduced, and the refrigerating performance of the environment testing equipment is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an environmental test apparatus of one embodiment;

FIG. 2 is a schematic view of a heat exchange device according to an embodiment;

fig. 3 is a cross-sectional view of the heat exchange device of fig. 2 taken along the A-A direction.

Reference numerals illustrate:

10. a heat exchange device; 100. a body; 110. a receiving chamber; 120. a first air inlet; 130. a first air outlet; 140. a second air inlet; 150. a second air outlet; 160. a mounting part; 200. a heat exchange member; 210. a heat exchange channel; 220. a first straight pipe section; 230. a second straight tube section; 240. a curved pipe section; 250. a heat exchange branch pipe; 300. a heat exchange fin; 400. a first oil separator; 410. a first baffle; 420. a first oil separation filter screen; 500. an oil return assembly; 510. a floating ball; 520. a crank arm; 530. an oil return valve; 540. an oil return pipe; 600. a second oil separator; 700. a compressor; 800. a plate heat exchanger; 900. an evaporator; 1000. an electromagnetic valve; 1100. a throttle member; 1200. a drying and filtering device; 1300. environmental test equipment.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

As shown in fig. 1 and 2, in one embodiment, an environment testing apparatus 1300 is provided, which includes a compressor 700, a plate heat exchanger 800, an evaporator 900, and a heat exchanging device 10, where the compressor 700, the first air inlet 120, the accommodating chamber 110, the first air outlet 130, the plate heat exchanger 800, the evaporator 900, the second air inlet 140, the heat exchanging channel 210, and the second air outlet 150 can be sequentially communicated to form a closed cavity.

In this way, first, the compressor 700 can compress a low-temperature low-pressure heat exchange medium (the heat exchange medium may be a refrigerant such as fluorochlorocarbide or ammonia gas) into a high-temperature high-pressure heat exchange medium; then, the high-temperature and high-pressure heat exchange medium exchanges heat through the heat exchange device 10 and the plate heat exchanger 800, so that the high-temperature and high-pressure heat exchange medium releases heat to liquefy to form a low-temperature and high-pressure heat exchange medium; then, the low-temperature and high-pressure heat exchange medium is input into the evaporator 900 to be depressurized to form a low-temperature and low-pressure heat exchange medium, so that the low-temperature and low-pressure heat exchange medium can absorb heat in the environment to realize the refrigeration effect; finally, the low-temperature low-pressure heat exchange medium absorbs heat, is gasified and is input into the compressor 700 again through the heat exchange channel 210 for compression, so that the heat exchange medium can circularly flow in the closed cavity, the environment testing device 1300 can continuously refrigerate, and the reliability and the stability of the environment testing device 1300 are improved.

The environment testing device 1300 further includes connection pipes, and the compressor 700, the first air inlet 120, the accommodating cavity 110, the first air outlet 130, the plate heat exchanger 800, the evaporator 900, the second air inlet 140, the heat exchange channel 210 and the second air outlet 150 are correspondingly communicated through the connection pipes. In this way, the convenience and flexibility of the installation of the environment testing apparatus 1300 are improved.

As shown in fig. 1, in one embodiment, the environment testing apparatus 1300 further includes a first connection pipe, an electromagnetic valve 1000, and a throttling element 1100, wherein the first connection pipe is used for connecting the plate heat exchanger 800 and the evaporator 900, and the electromagnetic valve 1000 and the throttling element 1100 are both disposed on the first connection pipe. In this way, whether the heat exchange medium in the closed cavity circularly flows or not can be controlled through the electromagnetic valve 1000, and the flow of the heat exchange medium in the closed cavity is regulated through the throttling piece 1100, so that the refrigerating effect of the environment testing device 1300 is adjustable, and the applicability of the environment testing device 1300 is improved.

The throttle 1100 may be a flow regulating valve, a throttle flowmeter, or other element capable of regulating flow.

As shown in fig. 1, further, the environmental testing apparatus 1300 further includes a dry filter disposed on the first connection pipe. In this way, the drying filter can dry the air in the closed cavity, so as to avoid the problem that the compressor 700 is failed due to the fact that the moisture in the closed cavity is liquefied and enters the compressor 700, and improve the reliability and the service life of the environment testing device 1300.

As shown in fig. 2 and 3, in one embodiment, a heat exchange device 10 is provided and is applied to an environmental test apparatus 1300, and includes a body 100 and a heat exchange member 200. The body 100 is provided with a receiving cavity 110, a first air inlet 120, a first air outlet 130, a second air inlet 140, and a second air outlet 150, where the first air inlet 120, the receiving cavity 110, and the first air outlet 130 are sequentially communicated. The heat exchange member 200 is disposed in the accommodating cavity 110, and the heat exchange member 200 is provided with a heat exchange channel 210 having a first end and a second end, where the first end is communicated with the second air inlet 140, and the second end is communicated with the second air outlet 150, so that the heat exchange medium in the heat exchange channel 210 can exchange heat with the heat exchange medium in the accommodating cavity 110.

In the heat exchange device 10 in the above embodiment, when in use, the high-temperature and high-pressure heat exchange medium output by the compressor 700 is input to the first air inlet 120, and the low-temperature and low-pressure heat exchange medium output by the evaporator 900 is input to the second air inlet 140, so that heat exchange can be performed between the high-temperature and high-pressure heat exchange medium in the accommodating cavity 110 and the low-temperature and low-pressure heat exchange medium in the heat exchange channel 210 through the heat exchange member 200, and further, the temperature of the heat exchange medium output by the first air outlet 130 and the heat exchange medium input into the plate heat exchanger 800 is reduced, the corrosion speed of the plate heat exchanger 800 is reduced, the service lives of the environment test equipment 1300 and the plate heat exchanger 800 are prolonged, the temperature of the heat exchange medium output by the second air outlet 150 and the heat exchange medium input into the compressor 700 is increased, frosting of the compressor 700 is avoided, and the performances of the environment test equipment 1300 and the compressor 700 are improved. Compared with the traditional precooling device, the low-temperature low-pressure heat exchange medium output by the evaporator 900 is fully utilized, so that the low-temperature low-pressure heat exchange medium can exchange heat with the high-temperature high-pressure heat exchange medium input into the plate heat exchanger 800 through the heat exchange device 10, and further the low-temperature high-pressure heat exchange medium and the precooling device are not required to be additionally utilized to reduce the temperature of the heat exchange medium input into the plate heat exchanger 800, the complexity and the production cost of the environment testing device 1300 are reduced, and the refrigerating performance of the environment testing device 1300 is improved.

The body 100 may be a box, a cylinder, or other structures.

In other embodiments, the heat exchange device 10 can also be applied to an air conditioner, a refrigeration cabinet or other equipment requiring refrigeration. The principle is the same as or similar to that applied to the environment testing device and will not be described here again. In one embodiment, the body 100 includes an upper end cover, a cylinder, and a lower end cover, where the upper end cover, the cylinder, and the lower end cover can cooperate to form the accommodating cavity 110, and the first air inlet 120, the first air outlet 130, the second air inlet 140, and the second air outlet 150 are all disposed on the upper end cover. In this way, assembly of the heat exchange device 10 is facilitated.

As shown in fig. 2 and 3, the outer side wall of the main body 100 is provided with an attachment portion 160. In this way, the heat exchange device 10 can be fixedly connected with an external environment element through the mounting portion 160, so that the convenience of mounting the heat exchange device 10 is improved.

The mounting portion 160 may be a fixing screw, a plunger, a fixture block, or other fixed mounting structure. The mounting portion 160 is disposed on the outer sidewall of the body 100, and may be welded, plugged, clamped, screwed or otherwise fixedly connected.

The heat exchange member 200 may be a heat exchange tube, a heat exchange pipeline, a heat exchanger, a heat exchange jacket, or other heat exchange components provided with a heat exchange channel 210.

As shown in fig. 2 and 3, in one embodiment, the heat exchange device 10 further includes heat exchange fins 300, where the heat exchange fins 300 are fixedly connected to the outer side wall of the heat exchange member 200, so that heat transfer between the heat exchange member 200 and the heat exchange fins 300 is enabled. In this way, the heat exchange between the high-temperature and high-pressure heat exchange medium and the low-temperature and low-pressure heat exchange medium can be performed through the heat exchange piece 200 and the heat exchange fin 300, so that the heat exchange area of the heat exchange device 10 is increased, and the heat exchange performance and reliability of the heat exchange device 10 are improved.

Further, the heat exchange member 200 includes a first straight pipe section 220 having a first end, a second straight pipe section 230 having a second end, a curved pipe section 240 for communicating the first straight pipe section 220 with the second straight pipe section 230, and a heat exchange branch pipe 250, wherein the first straight pipe section 220 and the second straight pipe section 230 are disposed at intervals, the heat exchange branch pipe 250 is disposed between the first straight pipe section 220 and the second straight pipe section 230, and two ends of the heat exchange branch pipe 250 are in one-to-one communication with the first straight pipe section 220 and the second straight pipe section 230, such that the first straight pipe section 220, the curved pipe section 240, the heat exchange branch pipe 250, and the second straight pipe section 230 can cooperate to form the heat exchange channel 210, and the heat exchange fin 300 is fixedly connected with the heat exchange branch pipe 250, such that heat transfer can be performed between the heat exchange branch pipe 250 and the heat exchange fin 300. In this way, the heat exchange pieces 200 and the heat exchange fins 300 can be more uniformly distributed in the accommodating cavity 110, so that the heat exchange medium in the heat exchange channel 210 and the heat exchange medium in the accommodating cavity 110 are more uniform, and the heat exchange performance of the heat exchange device 10 is improved.

As shown in fig. 2 and 3, further, the heat exchanging fin 300 is provided with a through hole, one end of the heat exchanging branch pipe 250 is communicated with the first straight pipe section 220, the other end of the heat exchanging branch pipe 250 passes through the through hole and is communicated with the second straight pipe section 230, and the heat exchanging branch pipe 250 is in interference fit with the through hole. In this way, the heat exchange fin 300 can be stably and reliably fixed on the heat exchange branch pipe 250, so that the reliability and stability of heat transfer between the heat exchange branch pipe 250 and the heat exchange fin 300 are increased, and the reliability and stability of the heat exchange device 10 are improved.

The number of the heat exchange branch pipes 250 and the heat exchange fins 300 can be flexibly adjusted according to the actual use requirement. For example, the number of heat exchange branches 250 may be four, six, eight, or the like; the number of heat exchange fins 300 may be five, ten, fifteen, or the like.

As shown in fig. 3, optionally, at least two heat exchange branch pipes 250 and at least two heat exchange fins 300 are provided, each heat exchange fin 300 is provided with at least two through holes, and at least two heat exchange branch pipes 250 correspondingly pass through the at least two through holes, so that at least two heat exchange fins 300 can be fixed on at least two heat exchange branch pipes 250 at intervals. In this way, by increasing the number of the heat exchange branch pipes 250 and the heat exchange fins 300, the heat exchange area between the heat exchange medium in the accommodating cavity 110 and the heat exchange medium in the heat exchange channel 210 is increased, and the heat exchange performance and reliability of the heat exchange device 10 are improved.

As shown in fig. 2, in one embodiment, the second air inlet 140 and the second air outlet 150 are disposed between the first air inlet 120 and the first air outlet 130, and a connection line between the second air inlet 140 and the second air outlet 150 is perpendicular to a connection line between the first air inlet 140 and the first air outlet 150. In this way, the heat exchange medium input into the accommodating cavity 110 from the first air inlet 120 needs to pass through the outer side of the heat exchange member 200 and output from the first air outlet 130, so that the heat exchange medium in the accommodating cavity 110 can exchange heat with the heat exchange medium in the heat exchange channel 210, and the heat exchange performance and reliability of the heat exchange device 10 are improved.

In other embodiments, the connection line between the second air inlet 140 and the second air outlet 150 is disposed at an angle to the connection line between the first air inlet 140 and the first air outlet 150. In this way, the heat exchange medium introduced into the accommodating chamber 110 from the first air inlet 120 also passes through the outside of the heat exchange member 200 and is discharged from the first air outlet 130, so that the heat exchange medium in the accommodating chamber 110 can exchange heat with the heat exchange medium in the heat exchange channel 210.

Wherein, the connecting line between the second air inlet 140 and the second air outlet 150 and the connecting line between the first air inlet 140 and the first air outlet 150 are arranged in an included angle, and the included angle can be flexibly adjusted according to the actual use requirement. For example, the included angle may be 0 °, 45 °, 60 °, or the like.

As shown in fig. 2 and 3, in one embodiment, the heat exchange device 10 further includes a first oil separator 400 disposed in the accommodating chamber 110, the first oil separator 400 is disposed corresponding to the first air inlet 120, and the first oil separator 400 is used for separating lubricating oil in the heat exchange medium input into the accommodating chamber 110. In this way, the heat exchange member 200 and the first oil separator 400 are both disposed in the accommodating chamber 110, reducing the volume of the environmental testing apparatus 1300. Meanwhile, the first oil separator 400 can separate the lubricating oil in the heat exchange medium input into the accommodating chamber 110, so that the lubricating oil is prevented from entering the plate heat exchanger 800 and the evaporator 900, and the reliability of the environment testing device 1300 is improved. In addition, the heat exchange device 10 can replace a precooling device in the conventional environment testing device 1300, and reduce the number of the electromagnetic valve 1000 and the throttling element 1100, thereby reducing the production cost of the environment testing device 1300.

The first oil separator 400 may be a packed oil separator, a filter oil separator, or an oil separator of other structures.

As shown in fig. 2 and 3, further, the first oil separator 400 includes a first baffle 410 and a first oil separating screen 420, the first baffle 410 is fixedly connected with the inner sidewall of the accommodating cavity 110, and the first oil separating screen 420 is disposed on the first baffle 410 and is disposed corresponding to the first air inlet 120, so that the heat exchange medium in the first air inlet 120 can pass through the first oil separating screen 420 to be input into the accommodating cavity 110. In this way, when the high-temperature and high-pressure heat exchange medium output by the compressor 700 is input into the accommodating cavity 110, the flow velocity of the heat exchange medium is suddenly reduced and changed in direction due to the increase of the overflow section, and meanwhile, the heat exchange medium is filtered by the first oil separating filter 420, so that the lubricating oil mixed into the heat exchange medium can be separated out and is dripped and accumulated at the bottom of the accommodating cavity 110 along the first baffle 410, thereby realizing the technical effect of separating the lubricating oil.

The number of the first oil separating screens 420 can be flexibly adjusted according to the actual use requirement. For example, the number of first oil separation screens 420 may be three, five, eight, or the like.

The first baffle 410 is fixedly connected to the inner sidewall of the accommodating cavity 110 by a clamping, inserting, screwing, welding or other fixing connection manner. The first oil separating filter 420 is disposed on the first baffle 410, and may be fastened, plugged, hooked or otherwise fixedly connected.

Alternatively, the first baffle 410 is disposed between the first air inlet 120 and the first air outlet 130 along the axial direction of the body 100. In this way, the heat exchange medium entering the accommodating cavity 110 can flow along the first baffle 410 to the inner sidewall of the accommodating cavity 110 and the bottom of the accommodating cavity 110, so that the heat exchange medium input into the accommodating cavity 110 is prevented from being directly output from the first air outlet 130, the flow path and the flow duration of the heat exchange medium in the accommodating cavity 110 are prolonged, and the heat exchange performance and the reliability of the heat exchange device 10 are improved.

As shown in fig. 2 and 3, in an embodiment, the heat exchange device 10 further includes an oil return assembly 500, and the oil return assembly 500 is used for draining the lubricating oil in the accommodating cavity 110. In this way, the oil return assembly 500 is utilized to timely discharge the lubricating oil in the accommodating cavity 110, so that the accommodating cavity 110 is guaranteed to have enough space to accommodate the heat exchange medium, and meanwhile, the lubricating oil is prevented from flowing out of the first air outlet 130 and being remixed with the heat exchange medium, so that the heat exchange effect and the oil separation effect of the heat exchange device 10 are improved.

The oil return assembly 500 may be a combination of a ball float valve and an oil return pipe, a combination of a manual oil return valve and an oil return pipe, or other oil return structures.

As shown in fig. 2, optionally, the body 100 is further provided with an opening communicated with the accommodating cavity 110, the oil return assembly 500 includes a floating ball 510, a crank arm 520, an oil return valve 530 and an oil return pipe 540, the floating ball 510 is disposed in the accommodating cavity 110, one end of the crank arm 520 is in transmission connection with the floating ball 510, the other end of the crank arm 520 is in transmission connection with the oil return valve 530, the oil return valve 530 is disposed at one end of the oil return pipe 540, the other end of the oil return pipe 540 passes through the opening and extends out of the accommodating cavity 110, and the oil return valve 530 can be opened or closed by ascending or descending of the floating ball 510, so that the oil return pipe 540 can be controlled to be conducted or blocked with the accommodating cavity 110. Thus, when the oil level in the accommodating cavity 110 rises, the floating ball 510 also rises synchronously, so that the floating ball 510 can drive the crank arm 520 to move, and further the crank arm 520 can open the oil return valve 530, so that the lubricating oil in the accommodating cavity 110 can sequentially pass through the oil return valve 530 and the oil return pipe 540 and be discharged out of the accommodating cavity 110 under the action of the heat exchange medium in the accommodating cavity 110. When the oil level in the accommodating cavity 110 is reduced, the floating ball 510 is also synchronously reduced, so that the floating ball 510 can drive the crank arm 520 to move, and the crank arm 520 can close the oil return valve 530, thereby avoiding the heat exchange medium in the accommodating cavity 110 from leaking, and improving the reliability of the environment testing device 1300 and the heat exchange device 10.

Optionally, the other end of the oil return tube 540 communicates with the crankcase of the compressor 700. In this way, the lubricant flowing out of the compressor 700 can flow into the compressor 700 again, improving the utilization rate of the lubricant and the reliability of the environment testing apparatus 1300.

As shown in fig. 2 and 3, in one embodiment, the heat exchange device 10 further includes a second oil separator 600 disposed in the accommodating chamber 110, where the second oil separator 600 is disposed corresponding to the first air outlet 130, and the second oil separator 600 is used for separating lubricating oil in the heat exchange medium that is output from the accommodating chamber 110. In this way, the second oil separator 600 can separate the lubricating oil in the heat exchange medium of the output accommodating chamber 110, so as to prevent the lubricating oil from entering the plate heat exchanger 800 and the evaporator 900, and improve the reliability of the environment testing device 1300.

The second oil separator 600 may be a packed oil separator, a filter oil separator, or an oil separator of other structures.

Further, the heat exchange device 10 further includes a first oil separator 400 and a second oil separator 600 disposed in the accommodating cavity 110, the first oil separator 400 is disposed corresponding to the first air inlet 120, and the first oil separator 400 is used for separating lubricating oil in the heat exchange medium input into the accommodating cavity 110; the second oil separator 600 is disposed corresponding to the first air outlet 130, and the second oil separator 600 is used for separating lubricating oil in the heat exchange medium of the output accommodating chamber 110. In this way, the first oil separator 400 and the second oil separator 600 separate the lubricating oil in the heat exchange medium output from the compressor 700 twice, thereby improving the effect of separating the lubricating oil by the heat exchange device 10 and the reliability of the environment testing apparatus 1300.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. The term "and/or" as used in this invention includes any and all combinations of one or more of the associated listed items.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

It will be further understood that when interpreting the connection or positional relationship of elements, although not explicitly described, the connection and positional relationship are to be interpreted as including the range of errors that should be within an acceptable range of deviations from the particular values as determined by those skilled in the art. For example, "about," "approximately," or "substantially" may mean within one or more standard deviations, and is not limited herein.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A heat exchange device for an environmental test apparatus, the environmental test apparatus comprising a compressor, a plate heat exchanger, an evaporator, the heat exchange device comprising:

The heat exchange piece is arranged in the accommodating cavity, the heat exchange piece is provided with a heat exchange channel with a first end and a second end, the first end is communicated with the second air inlet, and the second end is communicated with the second air outlet, so that heat exchange medium in the heat exchange channel can exchange heat with heat exchange medium in the accommodating cavity;

the compressor, the first air inlet, the accommodating cavity, the first air outlet, the plate heat exchanger, the evaporator, the second air inlet, the heat exchange channel and the second air outlet can be sequentially communicated to form a closed cavity.

2. The heat exchange device of claim 1, further comprising heat exchange fins fixedly connected to the outer side walls of the heat exchange member such that heat transfer between the heat exchange member and the heat exchange fins is enabled.

3. The heat exchange device according to claim 2, wherein the heat exchange member includes a first straight tube section provided with the first end, a second straight tube section provided with the second end, a bent tube section for communicating the first straight tube section with the second straight tube section, and a heat exchange branch tube provided between the first straight tube section and the second straight tube section at a spacing, and both ends of the heat exchange branch tube are in one-to-one correspondence with the first straight tube section and the second straight tube section, so that the first straight tube section, the bent tube section, the heat exchange branch tube, and the second straight tube section can be mated to form the heat exchange channel, and the heat exchange fin is fixedly connected with the heat exchange branch tube, so that heat transfer can be performed between the heat exchange branch tube and the heat exchange fin.

4. The heat exchange device of claim 1, wherein the second air inlet and the second air outlet are both disposed between the first air inlet and the first air outlet, and a connection line between the second air inlet and the second air outlet is perpendicular to a connection line between the first air inlet and the first air outlet.

5. The heat exchange device according to any one of claims 1 to 4, further comprising a first oil separator provided in the accommodating chamber, the first oil separator being provided in correspondence with the first air inlet, the first oil separator being for separating lubricating oil that is input into the heat exchange medium of the accommodating chamber.

6. The heat exchange device of claim 5, wherein the first oil separator comprises a first baffle and a first oil separating filter screen, the first baffle is fixedly connected with the inner side wall of the accommodating cavity, and the first oil separating filter screen is arranged on the first baffle and corresponds to the first air inlet, so that heat exchange medium in the first air inlet can be input into the accommodating cavity through the first oil separating filter screen.

7. The heat exchange device of claim 6, wherein the first baffle is disposed between the first air inlet and the first air outlet along an axial direction of the body.

8. The heat exchange device of claim 5 further comprising an oil return assembly for draining lubricant oil from the receiving chamber.

9. The heat exchange device according to any one of claims 1 to 4, further comprising a second oil separator provided in the accommodating chamber, the second oil separator being provided in correspondence with the first air outlet, the second oil separator being for separating and outputting lubricating oil in the heat exchange medium of the accommodating chamber.

10. An environmental testing apparatus comprising a heat exchange device according to any one of claims 1 to 9.