CN111442575A

CN111442575A - Adjustable refrigerating device and refrigerating adjusting method

Info

Publication number: CN111442575A
Application number: CN202010187621.0A
Authority: CN
Inventors: 罗海亮; 刘海潮; 刘洪�; 李金峰; 李海滨; 娄小军; 金健; 尹朝辉; 姜宇光; 陈鸣飞
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Design Institute Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Design Institute Co Ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-07-24

Abstract

The invention relates to the technical field of air conditioners, in particular to an adjustable refrigerating device and a refrigerating adjusting method. The adjustable refrigerating device comprises a heat pipe evaporation unit, an evaporation condenser and at least one set of condensing unit, wherein the condensing unit is arranged in an air-cooled environment area, the heat pipe evaporation unit and the condensing unit are respectively connected to two sides of the evaporation condenser through a first loop and a second loop, and the heat pipe evaporation unit is also connected with the condensing unit through a third loop; the unit areas of the condensing unit and the heat pipe evaporating unit can be adjusted, so that the condensing unit and the heat pipe evaporating unit respectively have changeable heat exchange areas. The adjustable refrigerating device has low energy consumption and strong adaptability, and can flexibly adjust the operation mode and the heat exchange area of each unit according to outdoor environmental factors.

Description

Adjustable refrigerating device and refrigerating adjusting method

Technical Field

The invention relates to the technical field of air conditioners, in particular to an adjustable refrigerating device and a refrigerating adjusting method.

Background

At present, machine rooms can be divided into data centers and small machine rooms according to the scale, and an edge data center is one of the data centers and has the characteristics of large quantity, small scale, low energy consumption and wide construction range. Since the room is required to maintain a constant indoor temperature due to the fact that servers and related equipment are stored in the room, a refrigeration system is generally disposed in the room.

Common refrigeration systems applied to data centers are mainly: the water cooling water chiller is combined with a plate exchanger (plate exchanger) and the air cooling water chiller is combined with a dry cooler. The former has excellent energy-saving effect, but has large water consumption and needs water source; the latter is more suitable for water-deficient areas, but the energy-saving effect is not obvious.

Common refrigeration systems applied to small machine rooms mainly include: air-cooled direct expansion systems. The system is suitable for areas with water sources lacking and places without cooling water systems, but the energy-saving effect is common and other adverse effects such as noise, heat island effect and the like can be brought.

The edge data center also needs to ensure that the units of the refrigeration system configured in the edge data center continuously operate due to the characteristics and in consideration of resource distribution of a construction area of the edge data center, and the operation of the units is not hindered by low temperature when the outdoor environment temperature is considered to be low. The existing refrigeration system can not integrate the advantages of low energy consumption and strong adaptability.

Therefore, the existing refrigeration systems applied to various machine rooms cannot have the characteristics of low energy consumption, strong adaptability and flexible adjustment for outdoor environmental factors (such as too low temperature or regional difference). Furthermore, once the refrigeration system of the existing data center refrigeration unit is arranged, capacity matching is difficult to perform subsequently, so that the industrial development of the data center industry is hindered.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an adjustable refrigerating device which is low in energy consumption and strong in adaptability and can flexibly adjust the operation mode and the heat exchange area of each unit according to outdoor environment factors.

The invention further provides a refrigeration adjusting method based on the adjustable refrigeration device.

The adjustable refrigerating device comprises a heat pipe evaporation unit, an evaporation condenser and at least one set of condensing unit, wherein the condensing unit is arranged in an air-cooled environment area, the heat pipe evaporation unit and the condensing unit are respectively connected to two sides of the evaporation condenser through a first loop and a second loop, and the heat pipe evaporation unit is also connected with the condensing unit through a third loop; the unit areas of the condensing unit and the heat pipe evaporating unit can be adjusted, so that the condensing unit and the heat pipe evaporating unit respectively have changeable heat exchange areas.

According to one embodiment of the invention, the condensing unit comprises a heat pipe condensing unit and/or a mechanical condensing unit, the heat pipe condensing unit and the mechanical condensing unit are both arranged in an air-cooled environment area, the heat pipe evaporating unit and the mechanical condensing unit are respectively connected to two sides of the evaporating condenser through a first loop and a second loop, and the heat pipe evaporating unit is further connected with the heat pipe condensing unit through a third loop.

According to one embodiment of the invention, the mechanical condensing unit comprises a mechanical condenser or a plurality of mechanical condensers arranged in parallel, one end of each mechanical condenser is detachably connected with the inlet end of the mechanical condensing unit through a gas collecting pipe, and the other end of each mechanical condenser is detachably connected with the outlet end of the mechanical condensing unit through a liquid separating pipe;

the heat pipe condensing unit comprises a heat pipe condenser or a plurality of heat pipe condensers which are arranged in parallel, one end of each heat pipe condenser is detachably connected with the inlet end of the heat pipe condensing unit through a gas collecting pipe, and the other end of each heat pipe condenser is detachably connected with the outlet end of the heat pipe condensing unit through a liquid distributing pipe;

the heat pipe evaporator set comprises a heat pipe evaporator or a plurality of heat pipe evaporators arranged in parallel, one end of each heat pipe evaporator is detachably connected with the inlet end of the heat pipe evaporator set, and the other end of each heat pipe evaporator is detachably connected with the outlet end of the heat pipe evaporator set.

According to one embodiment of the invention, the mechanical condensing unit and the heat pipe condensing unit can be interchangeably installed under the condition of the same specification.

According to one embodiment of the invention, quick-connect joints are respectively connected to two ends of the mechanical condenser, the heat pipe condenser and the heat pipe evaporator.

According to one embodiment of the present invention, the second circuit includes a compressor installed on a pipe between an inlet end of the condensing unit and the evaporative condenser, a throttle valve installed on a pipe between an outlet end of the condensing unit and the evaporative condenser, a gas-liquid separator installed on a pipe between the evaporative condenser and the compressor, and a liquid storage tank installed on a pipe between an outlet end of the condensing unit and the throttle valve.

According to one embodiment of the invention, the first loop comprises a booster pump and a one-way valve, the booster pump is installed between the inlet end of the heat pipe evaporator unit and the evaporative condenser, two ends of the booster pump are connected in parallel with a bypass pipeline, and the one-way valve is installed on the bypass pipeline.

According to one embodiment of the invention, the air-cooled environment area is internally provided with a unit area, the condensing units are arranged in the unit area of the air-cooled environment area, and one end of the unit area of the air-cooled environment area is provided with a fan.

The refrigeration regulation method based on the adjustable refrigeration device comprises the following steps:

driving the adjustable refrigerating device to switch among a plurality of operation modes according to the indoor and outdoor temperature difference;

the heat exchange areas of the heat pipe condensing unit, the mechanical condensing unit and the heat pipe evaporating unit are respectively changed by respectively changing the unit areas of the heat pipe condensing unit, the mechanical condensing unit and the heat pipe evaporating unit.

According to one embodiment of the invention, the operating modes include a first mode, a second mode, and a third mode;

the first mode is as follows: synchronously opening the first loop and the third loop and closing the second loop so as to enable the heat pipe evaporation unit and the heat pipe condensation unit to work synchronously;

the second mode is as follows: synchronously opening the first loop, the second loop and the third loop so as to enable the heat pipe evaporation unit, the mechanical condensation unit and the heat pipe condensation unit to synchronously work;

the third mode is as follows: and synchronously opening the first loop and the second loop and closing the third loop so as to ensure that the heat pipe evaporation unit and the mechanical condensation unit work synchronously.

One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

in the adjustable refrigerating device provided by the embodiment of the invention, the condensing unit is arranged in the air cooling environment area, so that the air cooling environment is provided for the condensing unit; the heat pipe evaporator set and the condenser set are respectively connected to two sides of the evaporator-condenser through a first loop and a second loop, so that two loops are respectively formed on the evaporation side and the condensation side of the evaporator-condenser, and the heat pipe evaporator set is connected with the condenser set through a third loop, so that the third loop is connected to the first loop in parallel, and the mode switching of the adjustable refrigerating device is realized by utilizing the on-off switching among the loops; because the unit areas of the condensing unit and the heat pipe evaporating unit can be adjusted, the condensing unit and the heat pipe evaporating unit respectively have variable heat exchange areas, so that the heat exchange areas of the units can be changed at any time according to environmental requirements, and high adaptability and flexibility of the operation of the refrigerating device are realized. The adjustable refrigerating device provided by the embodiment of the invention can realize real-time switching of at least three operation modes according to the change of indoor and outdoor environmental factors, and the heat exchange area of each unit is flexible and adjustable, so that the operation flexibility can be improved, the adjustable refrigerating device also has the advantages of a heat pipe refrigeration mode, a mechanical refrigeration mode and a heat pipe mechanical combination refrigeration mode, and has the advantages of low energy consumption and strong adaptability.

Furthermore, the refrigeration adjusting method can determine the required refrigeration quantity according to the indoor and outdoor temperature difference so as to match the operation mode of the adjustable refrigerating device, and can change the heat exchange area of each unit at any time according to the requirement, thereby realizing the real-time switching or the simultaneous operation of the mechanical refrigeration and the heat pipe refrigeration, reducing the power consumption of the compressor, reducing the redundant carrying of the heat exchanger and utilizing the natural cold source to the maximum extent.

Furthermore, the condensing unit of the adjustable refrigerating device can select a mechanical condensing unit or a heat pipe condensing unit according to the outdoor environment temperature, or simultaneously install the mechanical condensing unit and the heat pipe condensing unit, for example, the mechanical condensing unit is only installed in the device at the highest temperature in summer, the heat pipe condensing unit is only installed in the device at the lowest temperature in winter, and the mechanical condensing unit and the heat pipe condensing unit can be simultaneously installed in other periods, so that the coordination between the device and the outdoor environment temperature is further improved, the working efficiency of the device is improved, the real-time switching between the mechanical refrigeration and the heat pipe refrigeration or the simultaneous operation of the mechanical refrigeration and the heat pipe refrigeration are realized, the power consumption of a compressor is reduced, and the redundant carrying of a heat exchanger is reduced.

Furthermore, the adjustable refrigerating device and the refrigeration adjusting method can quickly assemble and disassemble the evaporator and the condenser by utilizing the quick connector, thereby adjusting the power consumption of each unit in real time, so that the heat exchange area of the adjustable refrigerating device can realize real-time field adjustment according to the difference of the refrigeration power consumption of the data center in different regional levels, and further solving the technical problems that the existing refrigerating units belong to standardized whole units, flexible and free combination cannot be realized, and field adjustment cannot be realized.

Furthermore, the adjustable refrigerating device can ensure that the unit can run continuously, and can adopt a heat pipe for refrigeration in cold seasons, so that a natural cold source is utilized to the maximum extent, and the refrigeration efficiency is improved; in a transition season with moderate temperature, the switching or synchronous operation of heat pipe refrigeration and mechanical refrigeration can be realized by connecting the loops in parallel, and the redundant carrying of the heat exchanger is reduced; the number of the condensers can be increased at any time under the outdoor high-temperature condition, so that the heat exchange area of the condensing unit is adjusted, the condensing temperature is reduced, the power consumption of the compressor is reduced, and the efficiency of utilizing a natural cold source is increased.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a tunable refrigeration unit according to an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating an operating condition of a variable capacity refrigeration unit according to an embodiment of the present invention in a first mode;

FIG. 3 is a schematic diagram illustrating an operating condition of a variable capacity refrigeration unit according to an embodiment of the present invention in a second mode;

fig. 4 is a schematic diagram illustrating an operation state of the adjustable refrigeration unit in the third mode according to the embodiment of the present invention.

Reference numerals:

1: a heat pipe evaporator set; 2: a heat pipe condensing unit; 3: a mechanical condensing unit; 4: a first fan; 5: a second fan; 6: a heat pipe condenser; 7: a gas collecting pipe; 8: a liquid separating pipe; 9: a quick-connect joint; 10: a mechanical condenser; 11: a temperature sensor; 12: a compressor; 13: an evaporative condenser; 14: a throttle valve; 15: a liquid storage tank; 16: a gas-liquid separator; 17: a booster pump; 18: a one-way valve.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

As shown in fig. 1 to 4, the present embodiment provides an adjustable refrigeration device (refrigeration device for short). The refrigerating device can realize real-time switching of at least three operation modes according to changes of indoor and outdoor environmental factors, thereby improving operation flexibility, having respective advantages of a heat pipe refrigeration mode, a mechanical refrigeration mode and a heat pipe mechanical combination refrigeration mode, and having the advantages of low energy consumption and strong adaptability. In addition, each unit can adjust unit area size as required at any time, that is to say, each unit structure has the advantage of size adjustable to make the device can change the heat transfer area of each unit as required at any time.

As shown in fig. 1, the refrigeration device includes a heat pipe evaporator unit 1, an evaporator condenser 13 and at least one set of condenser unit, the condenser unit is arranged in an air-cooled environment area, the heat pipe evaporator unit 1 and the condenser unit are respectively connected to two sides of the evaporator condenser 13 through a first loop and a second loop, the heat pipe evaporator unit 1 is further connected to the condenser unit through a third loop; the unit areas of the condensing unit and the heat pipe evaporating unit 1 can be adjusted, so that the condensing unit and the heat pipe evaporating unit respectively have changeable heat exchange areas. Because the unit areas of the condensing unit and the heat pipe evaporation unit 1 can be adjusted, the condensing unit and the heat pipe evaporation unit respectively have variable heat exchange areas, so that the heat exchange areas of the units can be changed at any time according to environmental requirements, and high adaptability and flexibility of the operation of the refrigerating device are realized.

In one embodiment, the condensing unit of the adjustable refrigeration device can select the mechanical condensing unit 3, the heat pipe condensing unit 2, or both the mechanical condensing unit 3 and the heat pipe condensing unit 2 according to the outdoor environment temperature, for example, only the mechanical condensing unit 3 is installed in the device at high temperature in summer, only the heat pipe condensing unit 2 is installed in the device at low temperature in winter, and both the mechanical condensing unit 3 and the heat pipe condensing unit 2 can be installed in other periods, so that the coordination between the device and the outdoor environment temperature is further improved, the working efficiency of the device is improved, the real-time switching between the mechanical refrigeration and the heat pipe refrigeration or the simultaneous operation of the mechanical refrigeration and the heat pipe refrigeration is realized, the power consumption of the compressor 12 is reduced, and the redundant carrying of the heat exchanger is reduced.

Specifically, as shown in fig. 1, the refrigeration device includes an evaporative condenser 13, a heat pipe evaporative unit 1, a heat pipe condensing unit 2, and a mechanical condensing unit 3. The heat pipe condensing unit 2 and the mechanical condensing unit 3 are arranged in an air cooling environment area, so that the air cooling environment is synchronously provided for the heat pipe condensing unit 2 and the mechanical condensing unit 3 by utilizing the air cooling environment area.

The heat pipe evaporation unit 1 and the mechanical condensation unit 3 are respectively connected to two sides of the evaporation condenser 13 through a first loop and a second loop, so that two loops are respectively formed on the evaporation side and the condensation side of the evaporation condenser 13, the heat pipe evaporation unit 1 and the mechanical condensation unit 3 which are respectively connected to the first loop and the second loop are coupled and connected by the evaporation condenser 13, and mechanical refrigeration is realized (namely, the evaporation condenser 13 is used for realizing evaporation condensation heat exchange).

The heat pipe evaporation unit 1 is connected with the heat pipe condensation unit 2 through a third loop, so that the third loop is connected to the first loop in parallel, when the third loop is opened, the heat pipe evaporation unit 1 and the heat pipe condensation unit 2 are connected in series on the heat pipe loop formed by connecting the first loop and the third loop in series, and because the heat pipe condensation unit 2 is in an air cooling environment area, the heat pipe condensation unit 2 and the heat pipe evaporation unit 1 realize heat pipe refrigeration together under the air cooling effect.

Therefore, the refrigeration device provided by the embodiment can realize the switching of the adjustable refrigeration device among a plurality of operation modes by utilizing the on-off switching among the loops, further realize the real-time switching or synchronous operation of heat pipe refrigeration and mechanical refrigeration, can improve the operation flexibility, can also have the respective advantages of the heat pipe refrigeration mode, the mechanical refrigeration mode and the heat pipe mechanical combination refrigeration mode, and has the advantages of low energy consumption and strong adaptability.

The unit areas of the heat pipe condensing unit 2, the mechanical condensing unit 3 and the heat pipe evaporating unit 1 can be adjusted, so that the heat pipe condensing unit 2, the mechanical condensing unit 3 and the heat pipe evaporating unit 1 respectively have changeable heat exchange areas. The device is adjustable in the regional headspace of air conditioner and structure, adjust the heat transfer area of heat pipe condensation unit 2 in operation heat pipe natural cooling mode (being heat pipe refrigeration mode or first mode), adjust the heat transfer area of mechanical condensation unit 3 when operation mechanical refrigeration mode (being the third mode), can be as required dynamic adjustment heat pipe condensation unit 2 and mechanical condensation unit 3's heat transfer area when operation heat pipe machinery is two to open the mode (being for short two mode or the second mode of opening), thereby reduce compressor 12 consumption, and can furthest utilize the nature cold source.

In order to adjust the heat exchange area of the unit on site conveniently, the mechanical condensing unit 3 described in this embodiment includes a mechanical condenser 10 or a plurality of mechanical condensers 10 connected in parallel, one end of each mechanical condenser 10 is detachably connected to the inlet end of the mechanical condensing unit 3 through a gas collecting pipe 7, and the other end of each mechanical condenser 10 is detachably connected to the outlet end of the mechanical condensing unit 3 through a liquid distributing pipe 8. Similarly, the heat pipe condensing unit 2 includes a heat pipe condenser 6 or a plurality of heat pipe condensers 6 arranged in parallel, one end of each heat pipe condenser 6 is detachably connected with the inlet end of the heat pipe condensing unit 2 through a gas collecting pipe 7, and the other end of each heat pipe condenser 6 is detachably connected with the outlet end of the heat pipe condensing unit 2 through a liquid separating pipe 8. Similarly, the heat pipe evaporator unit 1 includes a heat pipe evaporator or a plurality of heat pipe evaporators arranged in parallel, one end of each heat pipe evaporator is detachably connected with the inlet end of the heat pipe evaporator unit 1, and the other end of each heat pipe evaporator is detachably connected with the outlet end of the heat pipe evaporator unit 1.

The detachable parallel connection of the heat pipe evaporation unit 1, the mechanical condensation unit 3 and the heat pipe condensation unit 2 can increase or decrease the number of unit components at any time according to field requirements, so that the heat exchange area of each unit is changed in real time according to cooling demand, the device can achieve optimization of refrigeration performance to the maximum extent under the condition of meeting the demand of refrigerating capacity, energy is saved, consumption is reduced, refrigeration power consumption can be reduced by increasing or reducing the number of corresponding condensers, and the time of utilizing a natural cold source is prolonged.

It can be understood that the mechanical condensing unit 3 and the heat pipe condensing unit 2 can be interchangeably installed under the condition of the same specification, and the specific installation and connection structures of the mechanical condensing unit 3 and the heat pipe condensing unit 2 after the interchangeable installation are the same as those of the heat pipe condensing unit 2 and the mechanical condensing unit 3 before the interchange, which is not described herein again.

It can be understood that the mechanical condenser 10, the heat pipe condenser 6 and the heat pipe evaporator are respectively connected with the quick-connection joints 9 at two ends, thereby forming the above-mentioned detachable connection structure. Preferably, self-sealing valves are arranged at two ends of the quick-change connector, and the quick-change connector can be automatically closed after being separated, so that fluid is prevented from overflowing.

Taking the mechanical condenser 10 as an example, the detachable connection structure enables the mechanical condenser 10 to form a mechanical quick plug on the mechanical condensing unit 3, and the unit structure can be set according to the environmental requirement, only by ensuring the parallel connection between the mechanical condensers 10. Therefore, the quick connector 9 is matched with the distributed mechanical plugging and pulling installation structure, so that the mechanical condensing unit 3 can be adjusted on site, the size of the heat exchange area can be changed at any time, and cooling can be supplied according to the requirement. The structures of the heat pipe condenser 6 and the heat pipe evaporator are similar to the structure of the mechanical condenser 10, the condensers can be exchanged, redundant carrying is reduced, and the same parts are not described again.

Preferably, the mechanical condenser 10 may be selected from at least one of a finned tube condenser, a helical screw condenser, a microchannel condenser, and the like. Preferably, the heat pipe condenser 6 may be at least one selected from a vertical finned tube condenser, a helical screw condenser, a microchannel condenser, and the like. The pipe contact area of the condenser can be strengthened through the arrangement, so that the air heat exchange time is prolonged, the heat exchange effect is enhanced, the tail end resistance is balanced, and the refrigerant can be better uniformly distributed. Understandably, the spiral thread condenser is of an inner and outer sleeve structure, the outer pipe of the spiral thread condenser is a bare pipe, and the inner pipe is provided with internal threads.

Preferably, the evaporative condenser 13 may be any one of a plate heat exchanger and a shell-and-tube heat exchanger, etc., to enhance the heat exchange effect and save space and cost.

In one embodiment, the air-cooled environmental region includes a unit area, and the condensing units are arranged in the unit area of the air-cooled environmental region. Under the state that the condensing unit is the mechanical condensing unit 3 and the heat pipe condensing unit 2 which are installed at the same time, the mechanical condensing unit 3 and the heat pipe condensing unit 2 are sequentially arranged in the unit area of the air cooling environment area. The air-cooled environment area keeps a normal starting state, so that the mechanical condensing unit 3 and the heat pipe condensing unit 2 in the unit area are cooled by air flow in the area. Preferably, the heat pipe condensing unit 2 is installed between the mechanical condensing unit 3 and the unit area of the air cooling environment area, so that the heat pipe condensing unit 2 is more easily influenced by the air flow heat exchange of the air cooling environment area. Preferably, fans are arranged at the end parts of the unit area of the air cooling environment area, namely a first fan 4 positioned at the heat exchange area of the air cooling environment area and a second fan 5 positioned at the heat exchange area of the air cooling environment area as shown in fig. 1.

It can be understood that, in order to further improve the heat exchange effect of the air-cooled environment area on each unit, preferably, the second fan 5 must be arranged in the unit area of the air-cooled environment area, and then the second fan 5 and the air-cooled environment area are shared by the heat pipe condensing unit 2 and the mechanical condensing unit 3. The second fan 5 is installed at the side of the heat pipe condensing unit 2 and the mechanical condensing unit 3 and sucks air in the lateral direction (i.e., the horizontal direction shown in fig. 1), and the heat pipe condensing unit 2 and the mechanical condensing unit 3 are installed outdoors and are disposed at the suction side of the second fan 5 vertically or obliquely. The structures of the heat pipe condensing unit 2 and the mechanical condensing unit 3 close to the outer sides are all arranged into frame type modules for installation, the unit frame structure can be horizontally and transversely or longitudinally carried, and supporting columns can be increased or reduced according to the installation number and the use requirements of corresponding condensers in the frame structure.

It can be understood that the first fan 4 and the second fan 5 described in the present embodiment are both speed-adjustable fans.

In one embodiment, the second circuit includes a compressor 12 and a throttle 14. The compressor 12 is installed on a pipeline between the inlet end of the mechanical condensing unit 3 and the evaporative condenser 13, and when the compressor 12 is started, the working medium in the second loop is driven to flow, so that the second loop is driven to start. The throttle valve 14 is installed on a pipeline between the outlet end of the mechanical condensing unit 3 and the evaporative condenser 13, and the throttle valve 14 can work in cooperation with the compressor 12 to control the flow velocity of the working medium in the second loop, so that the flow velocity and the flow of the working medium flowing through the mechanical condensing unit 3 are adjusted, and the throttle valve can be used as one of the factors for adjusting the heat exchange amount of the mechanical condensing unit 3. The second loop further comprises a gas-liquid separator 16, and the gas-liquid separator 16 is installed on a pipeline between the evaporative condenser 13 and the compressor 12 and can separate gas and liquid of the working medium flowing out of the condensation side of the evaporative condenser 13. The second loop also comprises a liquid storage tank 15, and the liquid storage tank 15 is arranged on a pipeline between the outlet end of the mechanical condensing unit 3 and the throttle valve 14.

In one embodiment, the inlet end and the outlet end of the heat pipe evaporator unit 1 are respectively connected to the first loop. The inlet end and the outlet end of the mechanical condensing unit 3 are respectively connected to the second loop. And the inlet end and the outlet end of the heat pipe condensing unit 2 are respectively connected to a third loop.

In one embodiment, the first circuit includes a bypass line, with which pressurization of the first circuit is achieved. Specifically, the first loop comprises a booster pump 17 and a one-way valve 18, the booster pump 17 is installed between the inlet end of the heat pipe evaporator unit 1 and the evaporative condenser 13, two ends of the booster pump 17 are connected in parallel with a bypass pipeline, and the one-way valve 18 is installed on the bypass pipeline. The variable frequency booster pump 17 may provide pressure to the first loop when the elevation difference and end resistance do not meet requirements.

In one embodiment, the refrigeration unit further comprises a controller, a temperature sensor 11 and a switch. The controller is respectively connected with a temperature sensor 11 and a switch, the switch is installed on the compressor 12, and the temperature sensor 11 is installed on the mechanical condensing unit 3 located outdoors. The operation mode of the refrigerating device is switched by controlling the opening and closing of the compressor 12 and the fan according to the temperature regulation instruction. Meanwhile, a certain fluctuation threshold value is set for temperature adjustment, so that frequent plugging and unplugging of the evaporator and the condenser and frequent switching of system modes are prevented.

Specifically, the operation mode of the refrigeration device is as follows: the indoor temperature is assumed to be Tn and kept constant, and the outdoor temperature is Tw. The refrigerating device can select different operation modes according to the indoor and outdoor temperature difference.

The heat pipe cooling mode (i.e., the first mode) is operated when the outdoor temperature is low and the cooling capacity demand can be met, as shown in the a cycle in fig. 2. For example: setting Tw-Tn to be less than or equal to-10 ℃, and starting the first mode. At this time, the compressor 12 is turned off to close the second loop, the first fan 4 and/or the second fan 5 are/is kept in a starting state to enable the air cooling environment area to be in a normal starting state, and fan frequency conversion is correspondingly configured according to increase and decrease of the heat exchange area of the heat pipe condensing unit 2. The working medium circulation flow of the second circuit is stopped, the first circuit and the third circuit work normally, the check valve 18 on the bypass pipeline is closed, and the booster pump 17 is started. On the basis of the set temperature difference, the number of the original heat pipe condensers 6 is increased according to the heat exchange area ratio of 1:2 between the heat pipe evaporator and the heat pipe condensers 6, and the newly added heat pipe condensers 6 are arranged on a gas collecting pipe 7 and a liquid distributing pipe 8 of the heat pipe condenser unit 2 through quick change connectors. Correspondingly, the outdoor mechanical condenser 10 is completely disassembled or kept one.

The double start mode can be operated under the condition that the refrigerating capacity meets the requirement and the energy efficiency ratio is proper, such as a DC cycle, a DA cycle and a B cycle shown in figure 3. For example: when the set temperature range is-10 ℃ (Tw-Tn) minus 3 ℃, the indoor and outdoor temperature difference is at the middle temperature, and then the double start mode is operated. At this time, the compressor 12 is started, and the first fan 4 and/or the second fan 5 are/is kept in a starting state and the frequency conversion mode is started correspondingly. The non-return valve 18 on the first circuit is closed and the booster pump 17 is open. On the basis of the set temperature difference, the indoor load heat exchange requirement and the system refrigerating capacity of the system are balanced at the same time, and the system can be divided into a first temperature operation section and a second temperature operation section, wherein the temperature difference range of the first temperature operation section can be set to be-10 ℃ below (Tw-Tn) < -6 ℃, and the temperature difference range of the second temperature operation section is set to be-6 ℃ below (Tw-Tn) < 3. The first temperature operation section mainly carries out operation judgment by DA circulating operation, and the number of the original heat pipe condensers 6 is adjusted according to the heat exchange area ratio between the heat pipe evaporator and the heat pipe condensers 6 being 1: 1.5; the number of the original mechanical condensers 10 is adjusted according to the area ratio of 1:2.5 between the mechanical condensers 10 and the heat pipe condensers 6. The second temperature operation section mainly carries out operation judgment by taking DC and B circulation as main components, and the quantity of the original mechanical condensers 10 is adjusted according to the heat exchange area ratio of 1:1.1 between the heat pipe evaporator and the mechanical condensers 10; the number of the original heat pipe condensers 6 is adjusted according to the area ratio of the mechanical condenser 10 to the heat pipe condensers 6 being 1: 1.5. The heat pipe condenser 6 and the mechanical condenser 10 can be disassembled according to the number and are mutually matched for use. And respectively installing the corresponding newly-added heat pipe condenser 6 and the mechanical condenser 10 on the corresponding unit by using quick change connectors.

The mechanical cooling mode may be operated in case the outdoor temperature is high, as shown in fig. 4 for the C cycle and the B cycle. For example, Tw-Tn ≧ -3 ℃ is set to operate the mechanical cooling mode. At this time, the compressor 12 is started, and the first fan 4 and/or the second fan 5 are/is kept in a starting state and the frequency conversion mode is started accordingly. The working fluid in the second circuit circulates and drives no working fluid in the third circuit when the compressor 12 is sufficiently powered. The non-return valve 18 on the first circuit is open and the booster pump 17 is closed. On the basis of the set temperature difference, the number of the original mechanical condensers 10 is adjusted according to the area ratio of the heat pipe evaporator to the mechanical condensers 10 being 1:2, the newly added mechanical condensers 10 are installed on the gas collecting pipe 7 and the liquid distributing pipe 8 of the mechanical condensing unit 3 by using quick change connectors, and the outdoor heat pipe condensers 6 are all disassembled.

Therefore, the refrigerating device can select different operation modes according to the indoor and outdoor temperature difference, and the proportional relation of the heat exchange areas of the heat pipe evaporator, the heat pipe condenser 6 and the mechanical condenser 10 can be flexibly and nearby adjusted according to the actual number of the configured modules according to the proportion principle. And under the condition of higher outdoor temperature, the third mode of mechanical refrigeration is operated, the number of original mechanical refrigeration condensers is increased according to a certain proportion, and all heat pipe condensers 6 arranged outdoors are completely disassembled, so that the wind resistance of the heat exchanger in the air duct is reduced, and the area of the mechanical refrigeration condensers is increased. In the intermediate temperature operation double-start mode, the quantity of the condensers is adjusted according to a certain proportion of the heat pipe condensers 6 and the mechanical refrigeration condensers, the two condensers can be mutually allocated, the condensation area is increased, and meanwhile, the cost is controlled by combining the actual operation condition. When the outdoor temperature is lower, the heat pipe mode is operated, the number of the original heat pipe condensers 6 is increased according to a certain proportion, and the outdoor mechanical refrigeration condenser can be completely disassembled or kept one, so that the condensation area of the heat pipe is increased. At lower temperature, when the heat pipe mode can satisfy the refrigerating output demand, can keep original a heat pipe condenser 6, other condensers can all be dismantled, reduce the resistance.

The specific control process of the heat exchange area of the mechanical condensing unit 3 and the heat pipe condensing unit 2 is as follows: determining the refrigerating capacity required by the refrigerating device according to the indoor and outdoor temperature difference; and selecting the temperature interval of the air supply and the air return in the heat exchanger according to the required refrigerating capacity, adjusting the refrigerating device to the appropriate control mode according to the temperature interval, obtaining the heat exchanger design heat exchange capacity, the windward area, the pressure drop and the like of the units according to the known design parameters of each unit and the evaporative condenser 13, and finally adjusting the number of the corresponding evaporators and condensers by combining the control mode and the design parameters. Properly, when the heat exchange area of each unit is increased, the evaporator or the condenser of a part of the units can be adjusted to be large pipe diameter according to an empirical formula.

The specific control process for the temperature setting of the refrigeration device is as follows: measuring and calculating the corresponding optimal operation temperature intervals of the heat pipe refrigeration mode, the double-start mode and the mechanical refrigeration mode according to the coupling relation of the refrigerating capacity and the refrigerating performance coefficient; measuring the temperature of outdoor cold air, and setting the indoor required air supply temperature according to the refrigerating capacity required by the system; the refrigerating capacity is measured and calculated according to the heat loads of the heat pipe condenser 6 and the mechanical condenser 10, the structural parameters of the heat pipe refrigerating system and the mechanical refrigerating system are adjusted, the appropriate control mode is adjusted, and the heat exchange areas of all parts corresponding to the evaporator and the condenser are calculated, so that the refrigerating performance optimization, energy conservation and consumption reduction are realized to the greatest extent under the condition that the refrigerating capacity requirement is met.

The embodiment also provides a refrigeration adjusting method which is realized based on the adjustable refrigeration device. The refrigeration regulation method comprises the following steps:

according to the indoor and outdoor temperature difference, the adjustable refrigerating device is driven to switch among a plurality of operation modes, wherein the operation modes comprise a first mode, a second mode and a third mode. Wherein, the first mode is as follows: synchronously opening the air cooling environment area, the first loop and the third loop and closing the second loop so as to ensure that the heat pipe evaporation unit 1 and the heat pipe condensation unit 2 work synchronously; the second mode is as follows: synchronously opening the air cooling environment area, the first loop, the second loop and the third loop so as to enable the heat pipe evaporation unit 1, the mechanical condensation unit 3 and the heat pipe condensation unit 2 to synchronously work; the third mode is as follows: and synchronously opening the first loop and the second loop and closing the third loop and the air-cooled environment area so as to ensure that the heat pipe evaporation unit 1 and the mechanical condensation unit 3 work synchronously.

The refrigeration regulation method can realize the overall control process of the refrigeration device in the embodiment, and the specific control process is not described herein again.

In summary, in the adjustable refrigeration apparatus according to the present embodiment, the heat pipe condensing unit 2 and the mechanical condensing unit 3 are disposed in the air-cooling environment region, so as to provide an air-cooling environment for the heat pipe condensing unit 2 and the mechanical condensing unit 3; the heat pipe evaporation unit 1 and the mechanical condensation unit 3 are respectively connected to two sides of the evaporation condenser 13 through a first loop and a second loop, so that two loops are respectively formed on the evaporation side and the condensation side of the evaporation condenser 13, the heat pipe evaporation unit 1 is connected with the heat pipe condensation unit 2 through a third loop, so that the third loop is connected to the first loop in parallel, and the mode switching of the adjustable refrigeration device is realized by utilizing the on-off switching among the loops; the unit areas of the heat pipe condensing unit 2, the mechanical condensing unit 3 and the heat pipe evaporating unit 1 can be adjusted, so that the heat pipe condensing unit and the mechanical condensing unit respectively have changeable heat exchange areas, the heat exchange areas of the units can be changed at any time according to environmental requirements, and high adaptability and flexibility of operation of the refrigerating device can be realized. The adjustable refrigerating device provided by the embodiment of the invention can realize real-time switching of at least three operation modes according to the change of indoor and outdoor environmental factors, thereby improving the operation flexibility, simultaneously having the respective advantages of a heat pipe refrigeration mode, a mechanical refrigeration mode and a heat pipe mechanical combination refrigeration mode, and having the advantages of low energy consumption and strong adaptability.

Furthermore, the adjustable refrigeration adjusting method can determine the required refrigeration quantity according to the indoor and outdoor temperature difference so as to match the operation mode of the adjustable refrigeration device, and can change the heat exchange area of each unit at any time according to the requirement, thereby realizing the real-time switching or the simultaneous operation of the mechanical refrigeration and the heat pipe refrigeration, reducing the power consumption of the compressor 12, reducing the redundant carrying of the heat exchanger and utilizing the natural cold source to the maximum extent.

Furthermore, the adjustable refrigerating device and the refrigerating adjusting method can rapidly assemble and disassemble the evaporator and the condenser by utilizing the quick connector 9, thereby adjusting the power consumption of each unit in real time, enabling the heat exchange area of the adjustable refrigerating device to realize real-time field adjustment according to the difference of the refrigerating power consumption of the data center in different regional levels, and further solving the technical problems that the existing refrigerating units belong to standard whole units, flexible free combination cannot be realized, and field adjustment cannot be realized.

Furthermore, the adjustable refrigerating device can ensure that the unit can run continuously, and can adopt a heat pipe for refrigeration in cold seasons, so that a natural cold source is utilized to the maximum extent, and the refrigeration efficiency is improved; in a transition season with moderate temperature, the switching or synchronous operation of heat pipe refrigeration and mechanical refrigeration can be realized by connecting the loops in parallel, and the redundant carrying of the heat exchanger is reduced; the number of the condensers can be increased at any time under the outdoor high-temperature condition, so that the heat exchange area of the condensing unit is adjusted, the condensing temperature is reduced, the power consumption of the compressor 12 is reduced, and the efficiency of utilizing a natural cold source is increased.

The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.

Claims

1. An adjustable refrigerating device is characterized by comprising a heat pipe evaporation unit, an evaporation condenser and at least one set of condensation unit, wherein the condensation unit is arranged in an air-cooled environment area, the heat pipe evaporation unit and the condensation unit are respectively connected to two sides of the evaporation condenser through a first loop and a second loop, and the heat pipe evaporation unit is also connected with the condensation unit through a third loop; the unit areas of the condensing unit and the heat pipe evaporating unit can be adjusted, so that the condensing unit and the heat pipe evaporating unit respectively have changeable heat exchange areas.

2. The adjustable refrigerating device according to claim 1, wherein the condensing unit comprises a heat pipe condensing unit and/or a mechanical condensing unit, the heat pipe condensing unit and the mechanical condensing unit are both arranged in an air-cooled environment area, the heat pipe evaporating unit and the mechanical condensing unit are respectively connected to two sides of the evaporating condenser through a first loop and a second loop, and the heat pipe evaporating unit is further connected with the heat pipe condensing unit through a third loop.

3. The adjustable refrigeration device according to claim 2, wherein the mechanical condensation unit comprises a mechanical condenser or a plurality of mechanical condensers connected in parallel, one end of each mechanical condenser is detachably connected with the inlet end of the mechanical condensation unit through a gas collecting pipe, and the other end of each mechanical condenser is detachably connected with the outlet end of the mechanical condensation unit through a liquid separating pipe;

4. The adjustable refrigeration unit as claimed in claim 3, wherein the mechanical condenser and the heat pipe condenser are interchangeably mountable under the same specification.

5. The adjustable refrigeration device according to claim 3, wherein quick-connect joints are respectively connected to two ends of the mechanical condenser, the heat pipe condenser and the heat pipe evaporator.

6. The adjustable refrigerating device according to any one of claims 1 to 5, wherein the second loop comprises a compressor, a throttle valve, a gas-liquid separator and a liquid storage tank, the compressor is installed on a pipeline between the inlet end of the condensing unit and the evaporative condenser, the throttle valve is installed on a pipeline between the outlet end of the condensing unit and the evaporative condenser, the gas-liquid separator is installed on a pipeline between the evaporative condenser and the compressor, and the liquid storage tank is installed on a pipeline between the outlet end of the condensing unit and the throttle valve.

7. The adjustable refrigerating device according to any one of claims 1 to 5, wherein the first loop comprises a booster pump and a one-way valve, the booster pump is installed between the inlet end of the heat pipe evaporator unit and the evaporative condenser, two ends of the booster pump are connected in parallel with a bypass pipeline, and the one-way valve is installed on the bypass pipeline.

8. The adjustable refrigerating device according to any one of claims 1 to 5, wherein an unit area is arranged in the air-cooled environment area, the condensing units are arranged in the unit area of the air-cooled environment area, and a fan is arranged at one end of the unit area of the air-cooled environment area.

9. A refrigeration regulation method based on the adjustable refrigeration device as claimed in any one of claims 1 to 8, characterized by comprising the following steps:

10. The refrigeration conditioning method of claim 9 wherein the operating modes include a first mode, a second mode, and a third mode;