CN210602328U - Refrigerating device and medical compressor - Google Patents

Abstract

The utility model provides a refrigerating plant and medical compressor, refrigerating plant include heat exchanger, cooling subassembly and semiconductor refrigeration piece, the cooling subassembly includes the cooling plate, be equipped with air inlet, gas outlet and liquid outlet on the heat exchanger, the semiconductor refrigeration piece includes cold junction and hot junction, the heat exchanger with the cooling plate is cliied the semiconductor refrigeration piece, the cold junction of semiconductor refrigeration piece with the heat exchanger laminating, the hot junction of semiconductor refrigeration piece with the cooling plate laminating. The utility model discloses a refrigerating plant structure is ingenious, small in size, can install in medical compressor, and refrigerating plant provides cold volume by the semiconductor refrigeration piece, can cool down rapidly to the heat exchanger, makes the comdenstion water liquefaction in the air of heat exchanger of flowing through, reduces air humidity, and the heat that cooling subassembly produced the semiconductor refrigeration piece is discharged fast, prevents that the heat from gathering, guarantees refrigerating plant's refrigeration efficiency.

Description

Refrigerating device and medical compressor

Technical Field

The utility model relates to the technical field of medical equipment, particularly, relate to a refrigerating plant and medical compressor.

Background

The medical compressor is a common device in hospitals, can provide sufficient and clean compressed air for medical devices requiring air sources, and is commonly used for breathing equipment, oxygen generation equipment, pneumatic rehabilitation devices, cardio-pulmonary resuscitation machines, dental treatment equipment and the like.

Medical compressor passes through the compression pump with air compression, and the humiture can rise after the air is compressed, can cause the harm to the electronic component in the equipment after the too high compressed air of humidity gets into medical equipment, influences the life of equipment. In the prior art, in order to reduce the humidity of compressed air, a condenser is connected to an air outlet of a medical compressor, and the compressed air is cooled and dehumidified and then is introduced into medical equipment. This kind of mode has increased the equipment that the compressed air flowed through, and the compressed air mixes the impurity easily, and equipment connection is complicated, has the risk that the pipeline breaks off.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem how to make medical compressor output clean, dry compressed air.

In order to solve the problem, the utility model provides a refrigerating plant, including heat exchanger, cooling subassembly and semiconductor refrigeration piece, the cooling subassembly includes the cooling plate, be equipped with air inlet, gas outlet and liquid outlet on the heat exchanger, the semiconductor refrigeration piece includes cold junction and hot junction, the heat exchanger with the cooling plate is cliied the semiconductor refrigeration piece, the cold junction of semiconductor refrigeration piece with the heat exchanger laminating, the hot junction of semiconductor refrigeration piece with the cooling plate laminating.

Optionally, the heat exchanger includes an upper press plate, a heat exchange plate assembly and a lower press plate, the heat exchange plate assembly has a gas channel and a liquid channel, the gas inlet and the gas outlet are arranged on the upper press plate, the liquid outlet is arranged on the lower press plate, the gas inlet and the gas outlet are communicated with the gas channel of the heat exchange plate assembly, and the liquid outlet is communicated with the liquid channel of the heat exchange plate assembly.

Optionally, the heat transfer board subassembly includes a plurality of heat transfer boards, the heat transfer board includes the shell and imbeds the wind channel piece of shell, the shell is equipped with inlet port, venthole and lower liquid hole, the wind channel piece has first wind channel and the second wind channel that the fretwork formed, first wind channel with separate through the parting bead between the second wind channel, first wind channel covers the inlet port, the second wind channel covers the venthole, first wind channel the second wind channel with the parting bead covers the part respectively down the liquid hole, make the shell with form the return air passageway between the wind channel piece.

Optionally, the first air duct has a liquid collecting portion, and a water hole of the heat exchange plate is formed at a superposed portion of the liquid collecting portion and the lower liquid hole.

Optionally, the second air duct has an air return portion, and an air return hole of the heat exchange plate is formed at a superposed portion of the air return portion and the lower liquid hole.

Optionally, the positions of the air return portions on adjacent air duct pieces are different, so that the air return holes of adjacent heat exchange plates are staggered.

Optionally, the edges of the first air duct and the second air duct are provided with raised flow blocking blocks.

Optionally, the cooling assembly includes a heat pipe, the heat pipe is provided with a heat conducting liquid therein, and the heat pipe penetrates through the cooling plate.

Optionally, the cooling assembly includes a heat dissipation box and a heat dissipation fan, the heat dissipation fan is installed on the heat dissipation box, and the heat pipe passes through the heat dissipation box.

Compared with the prior art, the utility model discloses a refrigerating plant structure is ingenious, small in size, can install in medical compressor, and refrigerating plant provides cold volume by the semiconductor refrigeration piece, can cool down rapidly to the heat exchanger, makes the comdenstion water liquefaction in the air of flowing through the heat exchanger, reduces air humidity, and the heat that cooling subassembly produced the semiconductor refrigeration piece is discharged fast, prevents that the heat from gathering, guarantees refrigerating plant's refrigeration efficiency.

The utility model also provides a medical compressor, including foretell refrigerating plant. The refrigerating device can liquefy condensed water in the compressed air, greatly reduce the humidity of the compressed air and enable the medical compressor to output dry compressed air.

Drawings

Fig. 1 is a first perspective view of the medical compressor of the present invention;

fig. 2 is a second perspective view of the medical compressor of the present invention;

FIG. 3 is a bottom structure view of the medical compressor of the present invention;

fig. 4 is a first structural diagram of the medical compressor with the upper shell removed;

fig. 5 is a second structural diagram of the medical compressor with the upper shell removed;

FIG. 6 is a first internal structure view of the medical compressor of the present invention;

FIG. 7 is a structural view of a refrigerating apparatus of the medical compressor of the present invention;

FIG. 8 is a structural view of a cooling assembly of the refrigerating apparatus of the present invention;

FIG. 9 is a view showing a structure of a heat exchanger of the refrigerating apparatus according to the present invention;

FIG. 10 is a first block diagram of the heat exchanger with the upper platen and the lower platen removed;

FIG. 11 is a second schematic diagram of the heat exchanger with the upper platen and the lower platen removed;

FIG. 12 is a block diagram of a heat exchange plate of the heat exchanger;

FIG. 13 is an exploded view of a heat exchange plate;

FIG. 14 is a block diagram of a plate shell of a heat exchanger plate;

FIG. 15 is a block diagram of a lane tab of a heat exchange panel;

FIG. 16 is a block diagram of a heat exchanger plate assembly;

FIG. 17 is a first cross-sectional view of a heat exchange plate assembly;

fig. 18 is a cross-sectional view of the second heat exchange plate assembly.

Description of reference numerals:

10-upper shell, 11-pressure gauge, 12-alarm lamp, 13-switch, 14-base, 15-air outlet, 16-bottom plate, 17-heat dissipation hole, 18-caster;

211, a first-stage air inlet filter, 212, a second-stage air inlet filter, 213, a third-stage air inlet filter, 22, a compression pump, 23, a radiator, 24, an air storage tank, 25, a steam-water separator, 26, a metal ventilation block, 261, a temperature sensor, 262, a pressure relief valve, 27, a pressure regulating valve, 28, an air outlet filter and 29, an air source port;

30-a sealing box, 34-a fan and 35-a radiating air pipe;

40-a refrigerating device, 41-a heat exchanger, 42-a cooling plate, 43-a heat conduction pipe, 44-a heat dissipation box, 45-a heat dissipation fan and 46-a semiconductor refrigerating sheet;

51-air inlet, 52-air outlet, 53-liquid outlet, 54-upper pressing plate, 55-lower pressing plate, 56-heat exchange plate component and 57-clapboard;

60-plate shell, 61-air inlet hole, 62-air outlet hole and 63-liquid outlet hole;

70-air duct sheet, 71-first air duct, 72-second air duct, 73-separating strip, 74-liquid collecting part, 75-air return part and 76-flow blocking block;

81-water hole, 82-return air hole and 83-liquid gathering hole.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it should be noted that terms such as "upper", "lower", "front", "rear", and the like in the embodiments indicate terms of orientation, and are only used for simplifying the description of positional relationships based on the drawings of the specification, and do not represent that the elements, devices, and the like indicated in the description must be operated according to specific orientations and defined operations and methods, configurations, and such terms of orientation do not constitute limitations of the present invention.

In addition, the terms "first" and "second" mentioned in the embodiments of the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the embodiments of the present invention, the term "inside" and "outside" refers to the inside of the case and the outside of the case relative to a cavity structure, such as a case.

As shown in fig. 1 to 18, the present embodiment provides a medical compressor for providing compressed air to medical equipment in a hospital, where the medical compressor includes a compressor main unit and accessories mounted on the main unit, such as: hanging rods, monitors, transfusion rods, drawers and the like, and accessories are not shown in the figure. Referring to fig. 1 to 3, the main unit of the medical compressor has a housing including an upper housing 1, a base 14, and a bottom plate 16, wherein the upper housing 1 and the base 14 are hollow after being assembled to form an installation space for each component of the compressor. The casing is made of metal material and has good heat-conducting property, and the base 14 is also provided with an air outlet 15 for ventilation and heat dissipation. The bottom plate 16 is provided with a plurality of radiating holes 17, so that the radiating performance of the compressor is ensured, and components and parts are prevented from being lost due to overhigh internal temperature. The inner surface of the shell is pasted with sound absorption cotton, so that the noise generated when the compressor works can be reduced. The four corners of base 14 are equipped with truckle 18, and the medical compressor of being convenient for removes, and truckle 18 has the locating piece, can fix a position when medical compressor removes suitable position. The upper shell 1 is also provided with an instrument area, a pressure gauge 11, an alarm lamp 12 and a switch 13 are arranged in the instrument area, and the pressure gauge 11 is used for detecting the pressure of compressed air output by the medical compressor; the alarm lamp 12 is used for sending an abnormal prompt, a user can set alarm parameters of the medical compressor according to needs, and when the detection element detects that the compressor operates abnormally, an alarm signal is sent out through the alarm lamp 12; the switch 13 is used for controlling the starting and stopping of the medical compressor.

Referring to fig. 4 to 6, the medical compressor has a complete gas compression system, which is composed of a plurality of components, and specifically includes an air inlet filter assembly, a compression pump 22, a radiator 23, an air storage tank 24, a steam-water separator 25, a freezing device 40, a metal ventilation block 26, a pressure regulating valve 27 and an air outlet filter 28, which are connected in sequence by air pipes, which are not shown in the figures. Each part of the gas compression system is provided with a gas inlet and a gas outlet, wherein the steam-water separator 25, the refrigerating device 40, the metal ventilation block 26 and the pressure regulating valve 27 are also provided with a liquid outlet, and the gas inlet, the gas outlet and the liquid outlet of each part are respectively provided with a quick connector, so that the gas and liquid pipelines are conveniently assembled and connected.

Specifically, the filter component that admits air includes tertiary filter, is one-level air intake filter 211, second grade air intake filter 212 and tertiary air intake filter 213 respectively, and tertiary filter's filter fineness rises in proper order, can effectively get rid of the impurity in the air, and one-level air intake filter 211's filter fineness is 10um in this embodiment, and secondary air intake filter 212's filter fineness is 1um, and tertiary air intake filter 213's filter fineness is 0.1 um. The air outlet filter 28 is connected with the air source port 29, external medical equipment can receive air from the air source port 29, and the medical compressor of the embodiment has two air source ports 29, so that multiple groups of equipment can be used simultaneously.

The specific connection relationship of each part in the gas compression system of the medical compressor is as follows: the primary intake filter 211 communicates with the gas inlet of the secondary intake filter 212 through an air passage in the cabinet; the gas outlet of the secondary gas inlet filter 212 is connected with the gas inlet of the tertiary gas inlet filter 213 through a gas pipe; the gas outlet of the three-stage gas inlet filter 213 is connected with the gas inlet of the compression pump 22 through a gas pipe; the radiator 23 comprises fins and a gas collecting pipe, and a gas outlet of the compression pump 22 is connected with a gas collecting pipe inlet of the radiator 23 through the gas pipe; the outlet of the gas collecting pipe of the radiator 23 is connected with the gas inlet of the gas storage tank 24; a gas outlet of the gas storage tank 24 is connected with a gas inlet of the steam-water separator 25 through a gas pipe; the gas outlet of the steam-water separator 25 is connected with the gas inlet of the refrigerating device 40 through a gas pipe; the gas outlet of the refrigerating device 40 is connected with the gas inlet of the metal ventilating block 26 through a gas pipe; the gas outlet of the metal ventilation block 26 is connected with the gas inlet of the pressure regulating valve 27 through a gas pipe; the gas outlet of the pressure regulating valve 27 is connected with the gas inlet of the gas outlet filter 28 through a gas pipe; the air outlet filter 28 is connected with an air source port 29 to form an air passage of the medical compressor.

A primary intake filter 211, a secondary intake filter 212, an outlet filter 28 and an air supply port 29 in the air compression system are fixed to the outer back of the upper case 1 to facilitate the intake of air from the outside and the output of compressed air. The three-stage air inlet filter 213, the seal box 30, the radiator 23, the air storage tank 24, the steam-water separator 25, the metal ventilation block 26, the pressure regulating valve 27 and the air outlet filter 28 in the gas compression system are arranged in the upper shell 1, and the refrigerating device 40 is arranged on the base 14. The compressor pump 22 is mounted within the hermetic enclosure 30 to facilitate heat dissipation from the compressor pump 22. The sound-absorbing cotton is attached to the inner surface of the sealing box 30, so that the noise generated by the compression pump 22 can be reduced. The medical compressor is exquisite in design, reasonable in layout of all parts of the gas compression system, small in size and convenient to use, and is suitable for places such as small hospitals and nursing stations.

When the medical compressor works, the compression pump 22 is started to generate negative pressure, external air is sucked from the first-stage air inlet filter 211, and enters the compression pump 22 after being filtered by the second-stage air inlet filter 212 and the third-stage air inlet filter 213; the compression pump 22 compresses the air into high-temperature and high-pressure gas, and in the embodiment, the compression pump 22 can compress the air into 5 kilograms of high-pressure gas; high-temperature and high-pressure gas enters the gas storage tank 24, the gas storage tank 24 can play a role in stabilizing air pressure and cooling air, and quantitative compressed air can be stored in the gas storage tank 24, so that the pressure stability of the output gas is ensured; the gas output by the gas storage tank 24 enters a steam-water separator 25 to primarily separate the moisture in the compressed air, the temperature of the compressed air introduced into the steam-water separator 25 is high, and the moisture in the air cannot be naturally separated, so that the compressed air output by the steam-water separator 25 has high humidity; the high-humidity compressed air enters the refrigerating device 40, the refrigerating device 40 has high heat exchange efficiency, the temperature of the compressed air can be greatly reduced, condensed water in the compressed air is liquefied, and the dry compressed air is output after gas-liquid separation; the compressed air cooled and dehumidified by the refrigerating device 40 enters the metal ventilation block 26, the low-temperature compressed air may contact with external air to generate condensed water, a liquid outlet is formed in the metal ventilation block 26 to discharge the condensed water, a temperature sensor 261 is further arranged on the metal ventilation block 26 and used for detecting the temperature of the compressed air, and when the temperature of the compressed air is too high, an alarm signal can be sent out through the alarm lamp 12 to prompt a user that the compressor is abnormally operated; the compressed air output by the metal ventilation block 26 enters a pressure regulating valve 27, the pressure of the compressed air is regulated to the applicable pressure of the medical equipment, generally 3.5 kilograms, the compressed air output by the pressure regulating valve 27 is introduced into a pressure gauge 11, the air pressure is displayed, and the compressed air is convenient for a user to check; the compressed air with the pressure adjusted is introduced into the air outlet filter 28, filtered and then output from the air source port 29 for use by air equipment. The medical compressor of this embodiment work can turn into clean, dry compressed air with outside air, can directly let in medical equipment and use, can not cause the harm to medical equipment's electronic components.

As shown in fig. 3 to 6, the heat dissipating structure of the compressor further includes a fan 34 and a heat dissipating air duct 35 for circulating air in the hermetic container 30 and discharging hot air. An air inlet is formed in the side face of the seal box 30, an air outlet is formed in the bottom face of the seal box 30, the fan 34 comprises a volute and an impeller, an outlet of the volute is communicated with the air inlet of the seal box 30, and the heat dissipation air pipe 35 is arranged at the lower portion of the seal box 30 and is communicated with the air outlet of the seal box 30. When the compressor works, the fan 34 is started, wind generated by the impeller enters the seal box 30 from the volute outlet, high-temperature gas in the seal box 30 is blown out from the bottom air outlet, hot wind is discharged to outside air after passing through the heat dissipation air pipe 35, and the heat dissipation air pipe 35 is provided with a clip-shaped air duct, so that the temperature of the discharged gas can be reduced. The compressor blows out hot air in the seal box 30 through the fan 34, heat dissipation performance of the seal box 30 is improved, and the service life of the compressor is prevented from being influenced by overhigh internal temperature of the compressor.

The refrigerating device 40 of the medical compressor of the present embodiment is used for reducing the temperature of compressed air, removing moisture from the compressed air, and reducing the humidity of the compressed air, and the refrigerating effect thereof is directly related to the quality of the compressed air generated by the compressor. As shown in fig. 7 to 9, the refrigerating device 40 includes a heat exchanger 41, a temperature reduction assembly, and a semiconductor refrigeration sheet 46, a gas channel is provided inside the heat exchanger 41, and compressed air flows through the heat exchanger 41 to be reduced in temperature; the semiconductor refrigeration sheet 46 comprises a cold end and a hot end, wherein the cold end is used for cooling the heat exchanger 41; the cooling assembly is used to dissipate heat generated at the hot end of the semiconductor chilling plate 46.

Specifically, the heat exchanger 41 is provided with an air inlet 51, an air outlet 52 and an liquid outlet 53, the air inlet 51 is connected with a gas outlet of the steam-water separator 25, the air outlet 52 is connected with a gas inlet of the metal ventilation block 26, the compressed air is cooled and dried in the heat exchanger 41, moisture in the gas is liquefied into condensed water, and the dried compressed air is output and then subjected to pressure reduction and filtration to be used by gas equipment. The cooling assembly comprises a cooling plate 42, a heat conduction pipe 43, a heat dissipation box 44 and a heat dissipation fan 45, wherein a group of heat dissipation box 44 and the heat dissipation fan 45 are respectively arranged on two sides of the cooling plate 42, the heat dissipation fan 45 is installed on the heat dissipation box 44, the heat dissipation box 44 is provided with a plurality of heat dissipation fins, and the heat dissipation fan 45 can accelerate the air flow to enable the heat dissipation box 44 to dissipate heat quickly; the heat transfer pipe 43 penetrates the cooling plate 42 and the heat radiation case 44, and the heat transfer pipe 43 contains a heat transfer liquid having high heat conductivity, and can quickly transfer the heat of the cooling plate 42. The semiconductor refrigeration piece 46 is clamped between the heat exchanger 41 and the cooling plate 42, the cold end of the semiconductor refrigeration piece 46 is attached to the surface of the heat exchanger 41, and the hot end of the semiconductor refrigeration piece 46 is attached to the surface of the cooling plate 42. The heat exchanger 41 is cooled by the operation of the semiconductor cooling fins 46, and the cooling plate 42 absorbs the heat generated by the semiconductor cooling fins 46 and conducts the heat through the heat pipe 43, and the heat dissipation box 44 and the heat dissipation fan 45 help the heat pipe 43 to dissipate the heat quickly. In this embodiment, the number of the semiconductor cooling plates 46 is two, so that the number of the semiconductor cooling plates 46 is increased, and the cooling efficiency of the ventilator can be improved.

The refrigerating device 40 structure of this embodiment is ingenious, mutually supports between each part, provides cold volume by semiconductor refrigeration piece 46, can make heat exchanger 41 cool down rapidly, and compressed air lets in the condensation of moisture behind the heat exchanger 41, reduces compressed air humidity, and the heat that produces semiconductor refrigeration piece 46 by the subassembly of cooling is scattered fast, prevents that the heat from gathering, guarantees refrigerating device 40's refrigeration efficiency.

In order to further improve the heat dissipation efficiency of the cooling assembly, the outer side surface of the cooling plate 42 is attached to the inner wall of the base 14, and the base 14 is made of a metal material, so that the cooling plate 42 has good heat conduction performance and can accelerate heat dissipation. In addition, two air outlets 15 are arranged on the base 14, and the positions of the air outlets 15 correspond to the cooling fan 45, so that air circulation is facilitated, and cooling of the cooling assembly is accelerated. The air outlet 15 and the cooling fan 45 are provided with filter screens to prevent impurities from entering the inside of the compressor.

In addition, the structure of the heat exchanger 41 affects the circulation state of the compressed air on the heat exchanger 41, and directly affects the cooling efficiency of the refrigeration device 40, and the refrigeration device 40 of the present embodiment has the heat exchanger 41 with high heat exchange efficiency. Referring to fig. 9 to 11, the heat exchanger 41 includes an upper pressing plate 54, a heat exchange plate assembly 56, a partition plate 57, and a lower pressing plate 55, which are sequentially assembled from top to bottom, the heat exchange plate assembly 56 is formed by stacking a plurality of heat exchange plates, and the four corners of the heat exchanger 41 are provided with connecting screws, and the upper pressing plate 54, the heat exchange plate assembly 56, the partition plate 57, and the lower pressing plate 55 are mutually pressed and fixed by the connecting screws, so as to ensure the sealing performance of the heat exchanger 41. The heat exchange plate assembly 56 has a gas passage and a liquid passage, the gas inlet 51 and the gas outlet 52 of the heat exchanger 41 are arranged on the upper pressure plate 54, the liquid outlet 53 is arranged on the lower pressure plate 55, and the gas inlet 51, the gas outlet 52 and the liquid outlet 53 are provided with quick connectors, so that the heat exchanger 41 can be conveniently connected. The partition 57 is provided with a liquid collecting hole 83, and the liquid collecting hole 83 is communicated with the liquid outlet 53 on the lower pressing plate 55. The air inlet 51 and the air outlet 52 are communicated with the gas channel of the heat exchange plate assembly 56, and the compressed air enters the heat exchange plate assembly 56 from the air inlet 51, flows in the gas channel of the heat exchange plate assembly 56 and is discharged from the air outlet 52. The condensed water generated when the gas flows through the heat exchange plate assembly 56 enters the liquid channel of the heat exchange plate assembly 56, converges to the liquid collecting hole 83 on the partition plate 57, and is discharged from the liquid outlet 53.

Referring to fig. 12 to 18, the heat exchange plate assembly 56 is composed of a plurality of heat exchange plates, each heat exchange plate includes a plate shell 60 and an air duct sheet 70, the plate shell 60 has a raised frame, the air duct sheet 70 is embedded in the plate shell 60, the height of the frame is similar to the thickness of the air duct sheet 70, when the heat exchange plate assembly 56 is assembled, the plate shell 60 of a certain heat exchange plate compresses the air duct sheet 70 of the next adjacent heat exchange plate, and the frames of the plate shells 60 of each heat exchange plate are mutually overlapped to form an outer wall surface of the heat exchange plate assembly 56. The plate shell 60 is made of a metal material with excellent heat conduction performance, and the cold end of the semiconductor refrigeration sheet 46 is attached to the outer wall surface of the heat exchange plate assembly 56, so that the plate shell 60 is cooled, and the plate shell 60 is kept in a low-temperature state. The air duct pieces 70 are made of elastic rubber material, so that after the heat exchange plate assembly 56 is assembled, the plate shell 60 will press the adjacent air duct pieces 70 to ensure the sealing performance of the heat exchanger 41.

Referring to fig. 12 to 15, an air inlet 61, an air outlet 62 and a liquid outlet 63 are formed in the plate shell 60, the air duct plate 70 is partially hollowed to form a first air duct 71 and a second air duct 72, and the first air duct 71 and the second air duct 72 are separated by a separation strip 73. After the plate shell 60 and the air duct piece 70 are assembled, the first air duct 71 covers the air inlet hole 61, the second air duct 72 covers the air outlet hole 62, and the first air duct 71, the second air duct 72 and the separating strip 73 respectively cover part of the liquid outlet hole 63, so that a return air channel is formed between the plate shell 60 and the air duct piece 70. The flow direction of the compressed air on one heat exchange plate is as follows: the air enters the first air duct 71 from the air inlet 61 of the adjacent previous heat exchange plate shell 60, flows through the first air duct 71, enters the second air duct 72 through the return air channel, and flows out from the air outlet 62 of the adjacent previous heat exchange plate shell 60 after flowing through the second air duct 72. The gas contacts the surface of the plate shell 60 when flowing in the first air duct 71 and the second air duct 72, the temperature of the plate shell 60 is very low due to the action of the semiconductor refrigeration sheet 46, the temperature of the gas is reduced after contacting the plate shell 60, condensed water is separated out, the larger the contact area of the gas and the plate shell 60 is, the longer the retention time is, the higher the cooling efficiency of the heat exchanger 41 is, and the lower the humidity of the output compressed air is. Therefore, the raised flow blocking blocks 76 are arranged at the edges of the first air duct 71 and the second air duct 72, and the flow blocking blocks 76 can change the air flow direction, so that the compressed air stays on the surface of the plate shell 60 for a longer time, and the heat exchange effect is improved.

The first air duct 71 is provided with a liquid collecting portion 74, the liquid collecting portion 74 is arranged at the tail of the air flow direction of the first air duct 71, the width of the liquid collecting portion 74 is larger than that of the rest portion of the first air duct 71, condensed water generated after cooling of compressed air can flow along with the air, when the compressed air flows to the liquid collecting portion 74, the air flow direction is changed, and the condensed water is in contact with the edge of the liquid collecting portion 74 and is blocked. The overlapped part of the liquid collecting part 74 and the lower liquid hole 63 forms a water hole 81 of the heat exchange plate, and the condensed water collected at the edge of the liquid collecting part 74 flows into the water hole 81 and is finally collected to the liquid collecting hole 83 of the partition plate 57 to be discharged. The liquid collecting part 74 of the first air duct 71 is configured to facilitate collection of condensed water, and compressed air can be effectively separated from the condensed water. In other embodiments, the edge of the sump 74 may be arranged in a spiral shape, which has a better water-collecting effect. Furthermore, a filter screen is arranged in the water hole 81, and when the compressed air flows through the filter screen, condensed water in the air is easily hung by the filter screen, so that the separation effect of the compressed air and the condensed water is improved.

The second air duct 72 is provided with an air return part 75, the air return part 75 is arranged at the front part of the air flow direction of the second air duct 72, the width of the air return part 75 is smaller than that of the rest part of the second air duct 72, and the overlapped part of the air return part 75 and the lower liquid hole 63 forms an air return hole 82 of the heat exchange plate. Referring to fig. 16 to 18, the compressed air passes through the first air duct 71 and then enters the water inlet 81, the division bar partially overlaps the lower liquid outlet 63, and the air passes through the overlapping portion of the division bar and the lower liquid outlet 63 and enters the second air duct 72 through the air return hole 82. The edge of the second air duct 72, which is connected to the return air portion 75, is curved, so that the air flowing from the return air hole 82 can be diffused in the second air duct 72, and the area of the compressed air flowing through the plate casing 60 can be increased.

As shown in fig. 18, in order to further improve the heat exchange effect of the compressed air, the positions of the air return holes 82 on the adjacent heat exchange plates are staggered, that is, the positions of the air return portions 75 on the air duct sheets 70 of the adjacent heat exchange plates are different, the air return portion 75 of one air duct sheet 70 is close to one side edge of the second air duct 72, and the air return portion 75 of the adjacent air duct sheet 70 is close to the other side edge of the second air duct 72. Therefore, after flowing out from the first air duct 71 of a certain heat exchange plate, the air cannot directly flow into the return air hole 82 of an adjacent heat exchange plate, but only flows back into the second air duct 72 from the return air hole 82 of the heat exchange plate, so that the air flowing into the heat exchange plate can flow out from the air outlet hole 62 only after flowing through the first air duct 71 and the second air duct 72, and the heat exchange effect of the heat exchanger 41 is improved.

The medical compressor provided by the embodiment is provided with the efficient refrigerating device 40, the temperature of the compressed air can be rapidly reduced, water vapor is liquefied and separated, clean and dry compressed air is output for medical equipment, and the operation is convenient.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims (10)

1. The utility model provides a refrigerating plant, its characterized in that includes heat exchanger (41), cooling subassembly and semiconductor refrigeration piece (46), the cooling subassembly includes cooling plate (42), be equipped with air inlet (51), gas outlet (52) and liquid outlet (53) on heat exchanger (41), semiconductor refrigeration piece (46) include cold junction and hot junction, heat exchanger (41) with cooling plate (42) are cliied semiconductor refrigeration piece (46), the cold junction of semiconductor refrigeration piece (46) with heat exchanger (41) laminating, the hot junction of semiconductor refrigeration piece (46) with cooling plate (42) laminating.

2. Refrigeration apparatus according to claim 1, wherein the heat exchanger (41) comprises an upper platen (54), a heat exchanger plate assembly (56) and a lower platen (55), the heat exchanger plate assembly (56) having a gas passage and a liquid passage, the gas inlet (51) and the gas outlet (52) being arranged on the upper platen (54), the liquid outlet (53) being arranged on the lower platen (55), the gas inlet (51) and the gas outlet (52) being in communication with the gas passage of the heat exchanger plate assembly (56), the liquid outlet (53) being in communication with the liquid passage of the heat exchanger plate assembly (56).

3. A cold appliance according to claim 2, wherein the heat exchanger plate pack (56) comprises a plurality of heat exchanger plates, the heat exchange plate comprises a plate shell (60) and an air duct sheet (70) embedded in the plate shell (60), the plate shell (60) is provided with an air inlet (61), an air outlet (62) and a liquid outlet (63), the air duct piece (70) is provided with a first air duct (71) and a second air duct (72) which are formed in a hollow-out manner, the first air duct (71) and the second air duct (72) are separated by a separating strip (73), the first air duct (71) covers the air inlet hole (61), the second air duct (72) covers the air outlet hole (62), the first air duct (71), the second air duct (72) and the separating strip (73) respectively cover part of the lower liquid hole (63), so that an air return channel is formed between the plate shell (60) and the air duct piece (70).

4. A cold appliance according to claim 3, wherein the first air duct (71) has a liquid collecting portion (74), and the overlapping portion of the liquid collecting portion (74) and the lower liquid hole (63) forms a water hole (81) of the heat exchange plate.

5. A cold appliance according to claim 3, wherein the second air duct (72) has an air return portion (75), and the overlapping portion of the air return portion (75) and the lower liquid drain hole (63) forms an air return hole (82) of the heat exchanger plate.

6. A cold appliance according to claim 5, wherein the positions of the air return portions (75) of adjacent air duct fins (70) are different, so that the air return holes (82) of adjacent heat exchanger plates are misaligned.

7. A freezer according to claim 3, characterised in that the edges of the first air duct (71) and the second air duct (72) have raised flow baffles (76).

8. A freezer according to claim 1, wherein the cooling assembly comprises a heat pipe (43), the heat pipe (43) having a heat conducting liquid therein, the heat pipe (43) extending through the cooling plate (42).

9. A freezer according to claim 8, characterised in that the cooling assembly comprises a heat-dissipating box (44) and a heat-dissipating fan (45), the heat-dissipating fan (45) being mounted on the heat-dissipating box (44), the heat-conducting tube (43) passing through the heat-dissipating box (44).

10. A medical compressor, characterized by comprising a freezing device according to any one of claims 1 to 9.

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