CN220710836U - Heat dissipation system and laser device - Google Patents

Abstract

The utility model relates to the technical field of lasers, in particular to a heat dissipation system and laser equipment. The heat dissipation system comprises a compressor, a first condenser, a first throttling unit and a cold plate, wherein the compressor, the first condenser, the first throttling unit and the cold plate are sequentially connected in series end to form a circulation loop for circulating a cooling medium; the heat dissipation system further comprises a bypass branch which can be used for communicating the refrigerant outlet of the compressor to the refrigerant inlet of the cold plate, the bypass branch can be switched on and switched off, and the refrigerant in the bypass branch can be cooled down in a form of keeping the gas state. The laser device comprises the heat dissipation system. The utility model provides a heat dissipation system and laser equipment, which at least solve the technical problems that a cooling part of a laser in the prior art has a large volume and is easy to condense and frost when the laser is not started.

Description

Heat dissipation system and laser device

Technical Field

The utility model relates to the technical field of lasers, in particular to a heat dissipation system and laser equipment.

Background

The laser can generate heat during working, so that the temperature of the laser needs to be controlled within a proper range to ensure the stable and reliable operation of the laser, and the existing heat dissipation method of the laser generally comprises a natural convection method and a large-channel water cooling method. In the natural convection method, the surface layer of the laser is extended, the chip of the laser is cooled by using a natural heat dissipation mode, the heat dissipation mode has certain convenience, but the heat conduction performance requirement standard of the surface layer material of the laser is higher, and the heat dissipation mode can not meet the heat dissipation requirement of the laser along with the application of a high-power laser; in the large-channel water cooling method, a forced convection heat dissipation mode is adopted, wherein a part for directly cooling the laser is a water cooling plate, and the laser is subjected to heat dissipation treatment by utilizing the water cooling plate.

However, in the process of implementing the present utility model, the inventor finds that at least the following technical problems exist in the prior art: in addition, when the laser is not started, the laser is in a standby state, and the cooling medium is easy to cause the cooling part to condensate and frost so as to shorten the service life.

Accordingly, the present application provides a new heat dissipation system and laser device for the above-mentioned problems.

Disclosure of Invention

The utility model aims to provide a heat dissipation system which at least solves the technical problems that a cooling part of a laser in the prior art is large in size and is easy to condense and frost when the laser is not started.

The utility model also aims to provide the laser device so as to further solve the technical problems that the cooling piece of the laser in the prior art has larger volume and the cooling piece is easy to condense and frost when the laser is not started.

Based on the first object, the utility model provides a heat dissipation system, which comprises a compressor, a first condenser, a first throttling unit and a cold plate, wherein the compressor, the first condenser, the first throttling unit and the cold plate are sequentially connected in series end to form a circulation loop for circulating a cooling medium;

the heat dissipation system further comprises a bypass branch which can be used for communicating the refrigerant outlet of the compressor to the refrigerant inlet of the cold plate, the bypass branch can be switched on and switched off, and the refrigerant in the bypass branch can be cooled in a state of keeping a gaseous state.

Further, the heat dissipation system comprises a refrigeration mode and a standby mode;

when the heat radiation system is in the refrigeration mode, the first throttling unit is opened, and the bypass branch is disconnected;

when the heat radiation system is in the standby mode, the first throttling unit is started, the bypass branch flows through, and the refrigerant in the bypass branch is cooled in a state of keeping a gaseous state; or the first throttling unit is closed, the bypass branch flows through, and the refrigerant in the bypass branch is cooled in a form of keeping the gas state.

Further, the heat dissipation system further comprises a temperature sensor, wherein the temperature sensor is used for detecting the temperature of the device to be cooled;

when the temperature sensor detects that the temperature of the laser reaches a preset refrigeration starting temperature, the heat dissipation system starts the refrigeration mode; when the temperature sensor detects that the temperature of the laser reaches a preset refrigeration stop temperature, the heat dissipation system starts a standby mode; the preset refrigeration starting temperature is greater than the preset refrigeration stopping temperature.

Further, a second condenser and a first electromagnetic valve connected in series with the second condenser are arranged on the bypass branch;

or a third condenser and a second throttling unit connected with the third condenser in series are arranged on the bypass branch.

Further, when a third condenser and a second throttling unit connected in series with the third condenser are arranged on the bypass branch, the opening of the second throttling unit is larger than that of the first throttling unit.

Further, when a third condenser and a second throttling unit connected in series with the third condenser are arranged on the bypass branch, the number of the condensation pipe loops of the third condenser is smaller than that of the first condenser.

Further, when the bypass branch is provided with a second condenser and a first electromagnetic valve connected in series with the second condenser, the number of the condenser pipe loops of the second condenser is smaller than that of the first condenser.

Further, each throttling unit of the heat dissipation system is an electronic expansion valve, or each throttling unit of the heat dissipation system is a capillary tube, or each throttling unit of the heat dissipation system comprises a capillary tube and an electric valve which are connected in series.

Further, a condensing fan is arranged on the first condenser, and the condensing fan is a variable speed fan.

By adopting the technical scheme, the heat dissipation system has at least the following beneficial effects:

the heat dissipation system can be applied to a laser to dissipate heat of the laser, and can also be applied to other fields such as automobile batteries, and the heat dissipation system is only used for the laser for illustration. When the heat radiation system is applied to the laser, the mode of direct contact cooling of the cold plate and the laser is adopted to cool the laser, so that the heat radiation efficiency of the laser is improved, and the cold plate acts on the laser to jointly form the laser device, so that the unit is small in size and strong in portability, and the requirements of miniaturization and portability of the laser device can be met.

In addition, it is to be added that in this embodiment, the bypass branch can be turned on or off, and the bypass branch can cool the refrigerant in the bypass branch in a form of keeping the refrigerant in a gaseous state, so that the function required by the bypass branch can be selected according to the actual situation. When the refrigerant in the bypass branch is cooled in a form of keeping the gas state, the refrigerant in the bypass branch can be cooled at first, and meanwhile, the refrigerant in the bypass branch can be kept in the gas state, so that the refrigerant in the bypass branch can be cooled, but the temperature of the refrigerant in the bypass branch is still higher than the liquefaction temperature of the refrigerant, so that the refrigerant is always kept in the gas state, and therefore, the temperature of the refrigerant in the bypass branch is still higher at the moment, and the refrigerant in the bypass branch can be understood to be cooled in a small range.

In summary, in this cooling system, the compressor, the first condenser, the first throttling unit and the cold plate are connected in series end to end in order to form a circulation loop for the refrigerant to circulate, so when the laser is started, the laser can generate heat, at this time, the first throttling unit is opened, the refrigerant can be throttled and depressurized, and meanwhile, the bypass branch is disconnected, and at this time, the working process of the cooling system is as follows: the compressor consumes power to do work, the formed high-temperature high-pressure gaseous refrigerant is liquefied by heat release of the first condenser to become a high-temperature high-pressure liquid refrigerant, and the high-temperature high-pressure liquid refrigerant is throttled and depressurized by the first throttling unit to become a low-temperature low-pressure liquid refrigerant, so that the low-temperature low-pressure liquid refrigerant flows through the cold plate and can exchange heat with the laser, absorb the heat of the laser, realize the cooling of the laser and ensure that the laser works in a normal temperature range.

When the laser is not started, the laser can not generate heat and is in a standby mode, and the operation modes of the heat dissipation system comprise the following modes:

as a first mode which can be realized, the first throttling unit is opened, the throttling and depressurization functions can be realized, the bypass branch flows through, and the refrigerant in the bypass branch is cooled in a form of keeping the gas state. At this time, the compressor consumes power to do work, the formed high-temperature high-pressure gaseous refrigerant is liquefied by the heat release of the first condenser to become a high-temperature high-pressure liquid refrigerant, and the high-temperature high-pressure liquid refrigerant is throttled and depressurized by the first throttling unit to become a low-temperature low-pressure liquid refrigerant; meanwhile, the high-temperature and high-pressure gaseous refrigerant output by the compressor can flow into the bypass branch, the temperature of the refrigerant flowing into the bypass branch is slightly reduced, and the gaseous state with higher temperature is still maintained. The low-temperature liquid refrigerant passing through the first throttling unit and the high-temperature gaseous refrigerant output by the bypass branch are converged, and then the liquid refrigerant can be vaporized, so that the refrigerant entering the cold plate is in a gaseous state, and the temperature is increased, namely, the refrigerant output by the bypass branch enables the low-temperature refrigerant output by the first throttling unit to be heated, the refrigerant with lower temperature is prevented from entering the cold plate to enable the cold plate to be condensed and frosted, the service life of the cold plate is prolonged, in addition, the gaseous refrigerant enters the compressor through the cold plate, the compressor is not compressed with liquid, and the service life of the compressor is prolonged.

As a second mode that can be realized, the first throttling unit is closed, the bypass branch flows, and the refrigerant in the bypass branch is cooled while maintaining the gaseous state. At this time, the compressor consumes power to do work, the formed high-temperature and high-pressure gaseous refrigerant can only flow into the bypass branch, the temperature of the refrigerant flowing into the bypass branch is slightly reduced, and the gaseous state of a certain high temperature is still maintained. In addition, the gaseous refrigerant enters the compressor through the cold plate, so that the compressor is not compressed with liquid, and the service life of the compressor is prolonged.

In summary, in the heat dissipation system, when the laser is started, the laser can generate heat to exchange heat with the low-temperature refrigerant in the cold plate, on one hand, the high-temperature laser can perform the heating and temperature rising functions on the cold plate to prevent condensation and frosting of the cold plate, on the other hand, when the laser is not started, the laser cannot generate heat, and the cold plate is not provided with a heat source at the moment, so that the cold plate has the risk of condensation and frosting, and according to the heat dissipation system of the embodiment, on the first hand, the temperature of the refrigerant input into the cold plate from the compressor can be increased, and the gaseous refrigerant is formed, so that after the gaseous refrigerant with higher temperature enters the cold plate, the condensation and frosting of the cold plate can be prevented, and the service life of the cold plate is prolonged; in a second aspect, in the heat dissipation system of this embodiment, the high-temperature gaseous refrigerant output from the compressor is cooled and then introduced into the cold plate, for example, the first condenser, the first throttling unit and the bypass branch in the first implementation manner can cool the refrigerant, and the refrigerant in the bypass branch in the second implementation manner can cool the refrigerant entering the cold plate, so that the temperature of the refrigerant in the cold plate can be reduced, and the damage to the laser caused by too high temperature of the refrigerant in the cold plate can be prevented.

Based on the second object, the utility model provides a laser device, which comprises a laser and the heat dissipation system, wherein a cold plate of the heat dissipation system is used for dissipating heat of the laser.

By adopting the technical scheme, the laser equipment provided by the utility model has at least the following beneficial effects:

by arranging the heat dissipation system in the laser device, the laser device has all advantages of the heat dissipation system, and therefore, the description is omitted.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a heat dissipation system according to an embodiment of the present utility model;

FIG. 2 is a second schematic diagram of a heat dissipation system according to an embodiment of the present utility model;

fig. 3 is a third schematic structural diagram of a heat dissipation system according to an embodiment of the utility model.

Reference numerals:

1-a compressor;

2-a first condenser;

3-a first throttle unit;

4-cooling plates;

a 5-bypass branch;

61-a third condenser; 62-a second throttling unit; 621-capillary; 622-electric valve;

71-a second condenser; 72-a first solenoid valve;

8-a condensing fan.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

Referring to fig. 1, the present embodiment provides a heat dissipation system, which includes a compressor 1, a first condenser 2, a first throttling unit 3 and a cold plate 4, wherein the compressor 1, the first condenser 2, the first throttling unit 3 and the cold plate 4 are sequentially connected in series end to form a circulation loop for cooling medium circulation.

The heat dissipation system further comprises a bypass branch 5 which can be used for communicating the refrigerant outlet of the compressor 1 to the refrigerant inlet of the cold plate 4, the bypass branch 5 can be opened and closed, and the refrigerant in the bypass branch 5 can be cooled in a state of keeping a gaseous state.

The heat dissipation system may be applied to a laser, to dissipate heat from the laser, and may also be applied to other fields such as an automobile battery, and the following description will be given by taking the application of the heat dissipation system to the laser as an example. When the cooling system is applied to the laser, the cooling plate 4 is directly used for cooling the laser in a cooling manner by contacting with the laser, so that the cooling efficiency of the laser is improved, and the cooling plate 4 acts on the laser to jointly form the laser device, so that the unit is small in size and strong in portability, and the requirements of miniaturization and portability of the laser device can be met.

In addition, it should be added that in this embodiment, the bypass branch 5 itself can be turned on and off, and the bypass branch 5 can cool the refrigerant in it in a form of keeping the gas state, so that the required function of the bypass branch 5 can be selected according to the actual situation. When the refrigerant in the bypass branch 5 is cooled in the form of keeping the gas state, the refrigerant in the bypass branch 5 can be cooled first, and meanwhile, the refrigerant in the bypass branch 5 can be kept in the gas state, so that the refrigerant in the bypass branch 5 can be cooled, but the temperature of the refrigerant in the bypass branch 5 is still higher than the liquefaction temperature of the refrigerant, so that the refrigerant is always kept in the gas state, and therefore, the temperature of the refrigerant in the bypass branch 5 is still higher at this time, and the refrigerant in the bypass branch 5 can be understood to be cooled slightly.

In summary, in the heat dissipation system, the compressor 1, the first condenser 2, the first throttling unit 3 and the cold plate 4 are sequentially connected in series from beginning to end to form a circulation loop through which the refrigerant flows, so that when the laser is started, the laser can generate heat, at this time, the first throttling unit 3 is opened, the refrigerant can be throttled and depressurized, and meanwhile, the bypass branch 5 is disconnected, and at this time, the working process of the heat dissipation system is as follows: the compressor 1 consumes power to do work, the formed high-temperature high-pressure gaseous refrigerant is liquefied by heat release of the first condenser 2 to become a high-temperature high-pressure liquid refrigerant, and the high-temperature high-pressure liquid refrigerant is throttled and depressurized by the first throttling unit 3 to become a low-temperature low-pressure liquid refrigerant, so that the low-temperature low-pressure liquid refrigerant flows through the cold plate 4 and can exchange heat with the laser, absorb the heat of the laser, realize the cooling of the laser and ensure that the laser works in a normal temperature range.

When the laser is not started, the laser can not generate heat and is in a standby mode, and the operation modes of the heat dissipation system comprise the following modes:

as a first mode that can be realized, the first throttling unit 3 is opened, so that the throttling and depressurization functions can be performed, the bypass branch flows through, and the refrigerant in the bypass branch 5 is cooled in a state of keeping the gas state. At this time, the compressor 1 consumes power to do work, the formed high-temperature high-pressure gaseous refrigerant is liquefied by heat release of the first condenser 2 to become a high-temperature high-pressure liquid refrigerant, and the high-temperature high-pressure liquid refrigerant is throttled and depressurized by the first throttling unit 3 to become a low-temperature low-pressure liquid refrigerant; meanwhile, the high-temperature and high-pressure gaseous refrigerant output by the compressor 1 can flow into the bypass branch 5, the temperature of the refrigerant flowing into the bypass branch 5 is slightly reduced, and the gaseous state with higher temperature is still maintained. By means of the arrangement, after the low-temperature liquid refrigerant passing through the first throttling unit 3 is converged with the high-temperature gaseous refrigerant output by the bypass branch 5, the liquid refrigerant can be vaporized, so that the refrigerant entering the cold plate 4 is in a gaseous state, and the temperature is increased, namely, the refrigerant output by the bypass branch 5 enables the low-temperature refrigerant output by the first throttling unit 3 to be heated, the refrigerant with lower temperature is prevented from entering the cold plate 4 to condensate and frost the cold plate 4, the service life of the cold plate 4 is prolonged, in addition, the gaseous refrigerant enters the compressor 1 through the cold plate 4, the compressor 1 is not compressed with the liquid pressure, and the service life of the compressor 1 is prolonged.

As a second way that can be achieved, the first throttling unit 3 is closed, the bypass branch flows through, and the refrigerant in the bypass branch 5 is cooled while maintaining the gaseous state. At this time, the compressor 1 consumes power to perform work, and the formed high-temperature and high-pressure gaseous refrigerant can only flow into the bypass branch 5, the temperature of the refrigerant flowing into the bypass branch 5 is slightly reduced, and the gaseous state of a certain high temperature is still maintained. By the arrangement, the gaseous refrigerant with a certain high temperature is kept to enter the cold plate 4, condensation and frosting of the cold plate 4 can be prevented, the service life of the cold plate 4 is prolonged, in addition, the gaseous refrigerant enters the compressor 1 through the cold plate 4, the compressor 1 is not compressed with the water, and the service life of the compressor 1 is prolonged.

In summary, in the heat dissipation system, when the laser is started, the laser can generate heat to exchange heat with the low-temperature refrigerant in the cold plate 4, on one hand, the high-temperature laser can perform the function of heating and raising the temperature of the cold plate 4 to prevent the cold plate 4 from condensation and frosting, and on the other hand, when the laser is not started, the laser cannot generate heat, and at the moment, the cold plate 4 does not have a heat source, so that the cold plate 4 has the risk of condensation and frosting. In the second aspect, in the heat dissipation system of the present embodiment, the high-temperature gaseous refrigerant output from the compressor 1 is cooled and then introduced into the cold plate 4, for example, the first condenser 2, the first throttling unit 3 and the bypass branch 5 in the first implementation manner can cool the refrigerant, and the refrigerant in the bypass branch in the second implementation manner can cool the refrigerant in the bypass branch, so that the temperature of the refrigerant entering the cold plate 4 can be reduced, and the damage to the laser caused by too high temperature of the refrigerant in the cold plate 4 can be prevented.

Alternatively, in this embodiment, the compressor 1 is a variable frequency compressor, and the frequency of the compressor 1 is reduced when the laser is not in operation, so as to reduce the refrigerating capacity. Further alternatively, the first condenser 2 is a parallel flow condenser or a copper tube fin condenser.

Optionally, in this embodiment, the heat dissipation system includes a cooling mode and a standby mode; when the heat dissipating system is in the cooling mode, the first throttle unit 3 is opened and the bypass 5 is disconnected.

When the heat radiation system is in a standby mode, the first throttling unit 3 is started, the bypass branch 5 flows through, and the refrigerant in the bypass branch 5 is cooled in a state of keeping a gaseous state; alternatively, the first throttle unit 3 is closed, the bypass branch 5 is vented, and the refrigerant in the bypass branch 5 is cooled while maintaining the gaseous state.

When the laser is started, the heat radiation system is in a refrigerating mode, and at the moment, when the low-temperature low-pressure liquid refrigerant flows through the cold plate 4, the heat exchange can be carried out with the laser, the heat of the laser is absorbed, the cooling of the laser is realized, and the laser is ensured to work in a normal temperature range.

When the laser is not started, the heat radiation system is in a standby mode, so that a refrigerant with a lower temperature can be prevented from entering the cold plate 4 to cause condensation and frosting of the cold plate 4, the service life of the cold plate 4 is prolonged, in addition, a gaseous refrigerant enters the compressor 1 through the cold plate 4, the compressor 1 is not compressed with the water, and the service life of the compressor 1 is prolonged.

Optionally, in this embodiment, the heat dissipation system further includes a temperature sensor (not shown in the figure), and the temperature sensor is used to detect the temperature of the laser. When the temperature sensor detects that the temperature of the laser reaches the preset refrigeration starting temperature, the heat dissipation system starts a refrigeration mode; when the temperature sensor detects that the temperature of the laser reaches the preset refrigeration stop temperature, the heat dissipation system starts a standby mode; the preset cooling start temperature is greater than the preset cooling stop temperature.

When the temperature sensor detects that the temperature of the laser rises to a preset refrigeration starting temperature, the temperature of the laser is higher at the moment, the highest point for ensuring the laser to stably and reliably operate at a proper temperature is reached, and the cooling system starts a refrigeration mode at the moment, so that the cold plate 4 of the cooling system absorbs the heat of the laser, the laser is rapidly cooled, and the laser is ensured to work in a normal temperature range. Therefore, the temperature of the laser gradually decreases, when the temperature sensor detects that the temperature of the laser decreases to the preset refrigeration stop temperature, the temperature of the laser is lower at the moment, the lowest point of ensuring the stable and reliable operation of the laser to the proper temperature is reached, and the refrigeration mode of the heat dissipation system is closed and the standby mode is started at the moment.

By means of the arrangement, the temperature sensor detects the temperature of the laser to automatically control the heat radiation system to be in a refrigerating mode or a standby mode, so that the temperature of the laser is controlled between the preset refrigerating start temperature and the preset refrigerating stop temperature, and stable and reliable operation of the laser in a proper temperature range is ensured.

Optionally, referring to fig. 3, the bypass branch 5 is provided with a second condenser 71 and a first electromagnetic valve 72 connected in series with the second condenser 71.

In this arrangement, the first solenoid valve 72 is opened, and the high-temperature and high-pressure gaseous refrigerant output from the compressor 1 can flow into the bypass branch 5, and after passing through the second condenser 71, the refrigerant releases heat and cools, so that the temperature of the refrigerant is slightly lowered, and the gaseous state with higher temperature is still maintained.

Alternatively, referring to fig. 1, the bypass branch 5 is provided with a third condenser 61 and a second throttling unit 62 connected in series with the third condenser 61.

In this arrangement, the second throttling unit 62 is opened to enable the second throttling unit 62 to have the throttling and depressurization function, at this time, the high-temperature and high-pressure gaseous refrigerant output by the compressor 1 can flow into the bypass branch 5, after passing through the third condenser 61, the refrigerant releases heat and cools down, so that the temperature of the refrigerant is slightly lowered, and still keeps the gaseous state with higher temperature, and then the temperature of the refrigerant is further slightly lowered and still keeps the gaseous state with higher temperature by throttling and depressurization of the second throttling unit 62.

Alternatively, in the present embodiment, when the third condenser 61 and the second throttling unit 62 connected in series with the third condenser 61 are provided on the bypass branch 5, the opening degree of the second throttling unit 62 is larger than the opening degree of the first throttling unit 3.

By the arrangement, the flow rate of the refrigerant flowing through the bypass branch 5 is larger than the flow rates of the refrigerant flowing through the first condenser 2 and the first throttling unit 3, so that the refrigerant with higher temperature output by the bypass branch 5 is more than the refrigerant with lower temperature output by the first condenser 2 and the first throttling unit 3, after the refrigerant and the refrigerant are converged, the temperature of the refrigerant can be quickly increased, the low-temperature liquid refrigerant can be quickly vaporized, the refrigerant entering the cold plate 4 is prevented from being low in temperature, the cold plate 4 is prevented from being condensed and frosted, and the compressor 1 is prevented from being damaged due to hydraulic compression.

Alternatively, in the present embodiment, referring to fig. 1, when the bypass branch 5 is provided with the third condenser 61 and the second throttling unit 62 connected in series with the third condenser 61, the number of the condensation pipe loops of the third condenser 61 is smaller than that of the first condenser 2.

In addition, referring to fig. 3, when the bypass branch 5 is provided with the second condenser 71 and the first solenoid valve 72 connected in series with the second condenser 71, the number of the condensation pipe loops of the second condenser 71 is smaller than that of the first condenser 2.

It should be noted that, after the high-temperature and high-pressure gaseous refrigerant output by the compressor 1 passes through the first condenser 2, the heat can be released and liquefied, and because the number of the loops of the condensation pipe of the first condenser 2 is relatively large, the heat release time of the refrigerant in the first condenser 2 is long, the heat release area is large, and thus the gaseous refrigerant is easy to be liquefied to form a liquid refrigerant.

The number of the condensation pipe loops of the second condenser 71 is small, and the number of the condensation pipe loops of the third condenser 61 is small, so that the high-temperature and high-pressure gaseous refrigerant output by the compressor 1 can release heat after passing through the second condenser 71 or the third condenser 61, however, the number of the condensation pipe loops of the second condenser and the third condenser 61 is relatively small, so that the heat release time of the refrigerant in the second condenser 71 or the third condenser 61 is short, the heat release area is small, the gaseous refrigerant is not easy to liquefy after heat release and temperature reduction, and the gaseous state can be maintained.

Optionally, in this embodiment, each throttling unit of the heat dissipation system is an electronic expansion valve, or each throttling unit of the heat dissipation system is a capillary tube, or each throttling unit of the heat dissipation system includes a capillary tube and an electric valve connected in series.

That is, the first throttle unit 3 is an electronic expansion valve, or the first throttle unit 3 is a capillary tube, or the first throttle unit 3 includes a capillary tube and an electric valve connected in series. The second throttling unit 62 is an electronic expansion valve, or the second throttling unit 62 is a capillary tube, or the second throttling unit 62 comprises a capillary tube and an electric valve which are connected in series.

For example, referring to fig. 1, the first throttling unit 3 is an electronic expansion valve, and the second throttling unit 62 is an electronic expansion valve; alternatively, referring to fig. 2, the first throttling unit 3 is an electronic expansion valve, and the second throttling unit 62 includes a capillary tube 621 and an electric valve 622 connected in series.

It should be noted that, each throttling unit (including the first throttling unit 3 and the second throttling unit 62) mentioned in this embodiment refers to a valve integrated with a through flow channel and a throttling flow channel therein, which can implement three working states of through flow, cutoff and throttling, and the throttling unit can selectively throttle and decompress fluid such as refrigerant flowing therethrough, or does not throttle and decompress fluid (i.e. only makes fluid flow).

Alternatively, in the heat radiation system of the present embodiment, the opening degree of each throttle unit is controlled by the suction superheat degree of the suction port of the compressor 1.

Optionally, referring to fig. 1 and 2, in this embodiment, a condensing fan 8 is disposed on the first condenser 2, and the condensing fan 8 is a variable speed fan, so that the energy consumption of the heat dissipation system is reduced.

Example two

The second embodiment provides a laser device, where the laser device includes the heat dissipation system of the first embodiment, and technical features of the heat dissipation system disclosed in the first embodiment are also applicable to the first embodiment, and technical features of the heat dissipation system disclosed in the first embodiment are not repeated.

The laser device provided by the embodiment comprises the laser and the heat dissipation system, wherein the cold plate 4 of the heat dissipation system is used for dissipating heat of the laser, and the laser device further relieves the technical problem that the cold plate is easy to condense and frosted when the cooling piece of the laser in the prior art is large in size and the laser is not started.

The laser apparatus of the present embodiment has the advantage of the heat dissipation system of the first embodiment, which has been described in detail in the first embodiment, and is not repeated here.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The heat dissipation system is characterized by comprising a compressor (1), a first condenser (2), a first throttling unit (3) and a cold plate (4), wherein the compressor (1), the first condenser (2), the first throttling unit (3) and the cold plate (4) are sequentially connected in series end to form a circulation loop for cooling medium circulation;

the heat dissipation system further comprises a bypass branch (5) which can be used for communicating a refrigerant outlet of the compressor (1) to a refrigerant inlet of the cold plate (4), the bypass branch (5) can be switched on and switched off, and the refrigerant in the bypass branch (5) can be cooled in a state of keeping a gaseous state.

2. The heat dissipation system of claim 1, wherein the heat dissipation system comprises a cooling mode and a standby mode;

when the heat radiation system is in the refrigeration mode, the first throttling unit (3) is opened, and the bypass branch (5) is disconnected;

when the heat radiation system is in the standby mode, the first throttling unit (3) is opened, the bypass branch (5) is communicated, and the refrigerant in the bypass branch (5) is cooled in a state of keeping a gaseous state; or the first throttling unit (3) is closed, the bypass branch (5) is communicated, and the refrigerant in the bypass branch (5) is cooled in a state of keeping the gas state.

3. The heat dissipating system of claim 2, further comprising a temperature sensor for detecting a temperature of the device to be heat dissipated;

when the temperature sensor detects that the temperature of the laser reaches a preset refrigeration starting temperature, the heat dissipation system starts the refrigeration mode; when the temperature sensor detects that the temperature of the laser reaches a preset refrigeration stop temperature, the heat dissipation system starts a standby mode; the preset refrigeration starting temperature is greater than the preset refrigeration stopping temperature.

4. A heat dissipation system according to claim 2, characterized in that the bypass branch (5) is provided with a second condenser (71) and a first solenoid valve (72) connected in series with the second condenser (71);

or, the bypass branch (5) is provided with a third condenser (61) and a second throttling unit (62) connected in series with the third condenser (61).

5. The heat radiation system according to claim 4, wherein when a third condenser (61) and a second throttling unit (62) connected in series with the third condenser (61) are provided on the bypass branch (5), the opening degree of the second throttling unit (62) is larger than the opening degree of the first throttling unit (3).

6. The heat dissipation system according to claim 4, wherein when a third condenser (61) and a second throttling unit (62) connected in series with the third condenser (61) are disposed on the bypass branch (5), the number of condenser pipe loops of the third condenser (61) is smaller than the number of condenser pipe loops of the first condenser (2).

7. The heat dissipation system according to claim 4, wherein when the bypass branch (5) is provided with a second condenser (71) and a first electromagnetic valve (72) connected in series with the second condenser (71), the number of condenser pipe loops of the second condenser (71) is smaller than the number of condenser pipe loops of the first condenser (2).

8. The heat dissipation system of claim 4, wherein each throttling unit of the heat dissipation system is an electronic expansion valve, or each throttling unit of the heat dissipation system is a capillary tube, or each throttling unit of the heat dissipation system comprises a capillary tube and an electric valve connected in series.

9. The heat dissipation system according to claim 1, wherein a condensing fan (8) is provided on the first condenser (2), and the condensing fan (8) is a variable speed fan.

10. A laser device, characterized in that it comprises a laser and a heat dissipation system according to any one of claims 1-9, the cold plate (4) of which is used for dissipating heat from the laser.