CN112066496A

CN112066496A - Evaporation cooling unit, control method thereof and refrigeration equipment

Info

Publication number: CN112066496A
Application number: CN202010997468.8A
Authority: CN
Inventors: 张现红; 刘怀灿; 刘洋
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2020-12-11

Abstract

The invention discloses an evaporation cooling unit, a control method thereof and refrigeration equipment. Wherein, this unit includes: compressor refrigeration circuit by compressor, evaporative condenser and evaporimeter constitution, wherein: the exhaust end of the compressor is communicated with the inlet end of the evaporative condenser, the outlet end of the evaporative condenser is communicated with the first inlet end of the evaporator, and the first outlet end of the evaporator is communicated with the air suction end of the compressor; the natural cooling loop that comprises natural cooling coil, first refrigerant pump and evaporimeter, wherein: the natural cooling coil is arranged outdoors, the inlet end of the natural cooling coil is communicated with the first outlet end of the evaporator, and the outlet end of the natural cooling coil is communicated with the first inlet end of the evaporator; the first refrigerant pump is arranged on a pipeline between the outlet end of the natural cooling coil and the first inlet end of the evaporator. According to the invention, the natural cooling circulation and the compressor refrigeration circulation can be controlled to independently operate or simultaneously operate, so that the energy efficiency is improved.

Description

Evaporation cooling unit, control method thereof and refrigeration equipment

Technical Field

The invention relates to the technical field of units, in particular to an evaporation cooling unit, a control method thereof and refrigeration equipment.

Background

The evaporative cooling type water chilling unit (evaporative cooling unit) has high refrigeration energy efficiency, but the chilled water is not suitable for being applied to ultralow temperature refrigeration cycle and is limited to be used in the field of refrigeration and cold storage.

In the prior art, the glycol solution is added into the re-frozen water aiming at the problem that the frozen water is not suitable for the low-temperature freezing and refrigerating application scene, the heat exchange efficiency is reduced due to the above operation, and the glycol solution is toxic and is not suitable for terminal cold supply.

The evaporative condensation technology can effectively improve the cold energy efficiency of the unit due to high heat exchange efficiency, and is increasingly applied to different industrial places. For example, the evaporation cooling unit is applied to rail transit, commercial office buildings and the like, and meanwhile, the natural cooling technology is combined, so that a cold source in air is fully utilized, a high energy efficiency utilization rate is obtained in a low-temperature environment, and the application range of the evaporation cooling unit can be widened.

However, in the prior art, the natural cooling circulation and the compressor refrigeration circulation can not be operated simultaneously in a certain temperature interval, so that the problem of poor energy efficiency in the temperature interval is caused.

Aiming at the problem that the natural cooling circulation and the compressor refrigeration circulation can not be operated simultaneously in the prior art, an effective solution is not provided at present.

Disclosure of Invention

The embodiment of the invention provides an evaporation cooling unit, a control method thereof and refrigeration equipment, and aims to solve the problem that natural cooling circulation and compressor refrigeration circulation cannot be operated simultaneously in the prior art.

In order to solve the above technical problem, the present invention provides an evaporation cooling unit, wherein the unit comprises:

compressor refrigeration circuit by compressor, evaporative condenser and evaporimeter constitution, wherein: the exhaust end of the compressor is communicated with the inlet end of the evaporative condenser, the outlet end of the evaporative condenser is communicated with the first inlet end of the evaporator, and the first outlet end of the evaporator is communicated with the air suction end of the compressor;

the natural cooling loop that comprises natural cooling coil, first refrigerant pump and evaporimeter, wherein: the natural cooling coil is arranged outdoors, the inlet end of the natural cooling coil is communicated with the first outlet end of the evaporator, and the outlet end of the natural cooling coil is communicated with the first inlet end of the evaporator; the first refrigerant pump is arranged on a pipeline between the outlet end of the natural cooling coil and the first inlet end of the evaporator.

Further, the unit further includes:

the first valve is arranged on a pipeline between the inlet end of the natural cooling coil and the first outlet end of the evaporator and used for controlling whether the pipeline between the inlet end of the natural cooling coil and the first outlet end of the evaporator is communicated or not;

and the second valve is arranged on a pipeline between the outlet end of the natural cooling coil and the first inlet end of the evaporator and used for controlling whether the pipeline between the outlet end of the natural cooling coil and the first inlet end of the evaporator is communicated or not.

Further, the unit further includes:

the third valve is arranged on a pipeline between the first outlet end of the evaporator and the suction end of the compressor and used for controlling whether the pipeline between the first outlet end of the evaporator and the suction end of the compressor is conducted or not;

and the fourth valve is arranged on a pipeline between the outlet end of the evaporative condenser and the first inlet end of the evaporator and is used for controlling whether the pipeline between the outlet end of the evaporative condenser and the first inlet end of the evaporator is conducted or not.

Further, the unit further includes:

a first end evaporator, the inlet end of which is communicated with the second outlet end of the evaporator, and the outlet end of which is communicated with the second inlet end of the evaporator;

the second end evaporator is connected with the first end evaporator in parallel, the inlet end of the second end evaporator is communicated with the second outlet end of the evaporator, and the outlet end of the second end evaporator is communicated with the second inlet end of the evaporator; wherein the capacity of the second end evaporator is greater than the first end evaporator.

Further, the unit further includes:

the second refrigerant pump is arranged between a second outlet end of the evaporator and an inlet end of the first tail end evaporator and used for driving the refrigerant to flow from the second outlet end of the evaporator to the inlet end of the first tail end evaporator;

and the third refrigerant pump is arranged between the second outlet end of the evaporator and the inlet end of the second tail end evaporator and used for driving the refrigerant to flow from the second outlet end of the evaporator to the inlet end of the second tail end evaporator.

Further, the unit further includes:

the first throttling valve is arranged on a pipeline between the second refrigerant pump and the inlet end of the first tail end evaporator and used for controlling the refrigerant flow in the pipeline between the second refrigerant pump and the inlet end of the first tail end evaporator;

and the second throttling valve is arranged on a pipeline between the third refrigerant pump and the inlet end of the second tail end evaporator and used for controlling the refrigerant flow in the pipeline between the third refrigerant pump and the inlet end of the second tail end evaporator.

Further, the unit further includes:

and the third throttle valve is arranged on a pipeline between the outlet end of the evaporative condenser and the first inlet end of the evaporator and used for controlling the flow of the refrigerant in the pipeline between the outlet end of the evaporative condenser and the first inlet end of the evaporator.

Further, the unit further includes:

and the drying filter is arranged on the pipeline between the outlet end of the evaporative condenser and the first inlet end of the evaporator and is used for absorbing moisture in the pipeline and filtering impurities in the pipeline.

Further, the unit further includes:

and the fan is arranged beside the evaporative condenser and/or the natural cooling coil and used for accelerating the air flow outside the evaporative condenser and/or the natural cooling coil.

The invention also provides refrigeration equipment which comprises the evaporation cooling unit.

Further, the refrigeration equipment comprises at least one of the following: refrigerator, air conditioner.

The invention also provides a control method of the evaporation cooling unit, which is applied to the evaporation cooling unit and comprises the following steps:

acquiring an ambient temperature;

determining the operation mode of the evaporation cooling unit according to the range of the environment temperature; wherein the operation modes include a compressor refrigeration mode, a natural cooling mode and a mixed refrigeration mode;

and controlling the conduction of a compressor refrigeration loop and/or a natural cooling loop of the evaporation cooling unit according to the operation mode, wherein the compressor refrigeration loop and the natural cooling loop are arranged in the same evaporation cooling unit.

Further, the operation mode of the evaporation cooling unit is determined according to the range of the environment temperature, and the operation mode comprises the following steps:

if the ambient temperature is greater than a first threshold, determining that the operation mode of the evaporation cooling unit is a compressor refrigeration mode;

if the ambient temperature is less than or equal to the first threshold and greater than a second threshold, determining that the operation mode of the evaporation cooling unit is a mixed cooling mode;

determining that the operating mode of the evaporative cooling unit is a free cooling mode if the ambient temperature is less than or equal to the second threshold.

Further, according to the operation mode, the conduction of a compressor refrigeration circuit and/or a natural cooling circuit of the evaporation cooling unit is controlled, and the method comprises the following steps:

if the operation mode of the evaporation cooling unit is determined to be a compressor refrigeration mode, controlling the conduction of a compressor refrigeration loop;

if the operation mode of the evaporation cooling unit is determined to be a natural cooling mode, controlling the natural cooling loop to be conducted;

controlling the compressor refrigeration circuit and the natural cooling mode to be simultaneously conducted if it is determined that the operation mode of the evaporation cooling unit is a mixed refrigeration mode.

Further, controlling the compressor refrigeration circuit to conduct includes: controlling the compressor, the evaporative condenser and the fan to be started, and closing the first refrigerant pump; simultaneously controlling the first valve and the second valve to close, and controlling the third valve and the fourth valve to open;

controlling the natural cooling loop to conduct, including: controlling the first refrigerant pump and the fan to be started, and controlling the compressor and the evaporative condenser to be closed; simultaneously controlling the first valve and the second valve to be opened, and closing the third valve and the fourth valve;

controlling the compressor refrigeration circuit and the free cooling mode to be on simultaneously, including: controlling the compressor, the evaporative condenser, the first refrigerant pump and the fan to start; simultaneously controlling the first valve and the second valve, and the third valve and the fourth valve to be opened;

the first valve is arranged on a pipeline between the inlet end of the natural cooling coil and the first outlet end of the evaporator, the second valve is arranged on a pipeline between the outlet end of the natural cooling coil and the first inlet end of the evaporator, the third valve is arranged on a pipeline between the first outlet end of the evaporator and the air suction end of the compressor, and the fourth valve is arranged on a pipeline between the outlet end of the evaporative condenser and the first inlet end of the evaporator.

Further, after the compressor refrigeration circuit and/or the natural cooling circuit of the evaporation cooling unit are/is controlled to be conducted according to the operation mode, the method further comprises the following steps:

the operating parameter is adjusted based on a temperature at the first inlet end of the evaporator.

Further, after controlling the compressor refrigeration circuit to be conducted, the method for adjusting the operation parameters according to the temperature of the first inlet end of the evaporator comprises the following steps:

if the temperature of the first inlet end of the evaporator is higher than a first preset temperature, controlling the compressor to load and add frequency;

if the temperature of the first inlet end of the evaporator is less than or equal to a first preset temperature and greater than or equal to a second preset temperature, controlling the compressor to keep the current load and the running frequency;

and if the temperature of the first inlet end of the evaporator is lower than a second preset temperature, controlling the compressor to unload and reduce the frequency.

Further, after controlling the natural cooling loop to be conducted, adjusting the operation parameters according to the temperature of the first inlet end of the evaporator includes:

if the temperature of the first inlet end of the evaporator is higher than a first preset temperature, controlling the first refrigerant pump to load and add frequency;

if the temperature of the first inlet end of the evaporator is less than or equal to a first preset temperature and greater than or equal to a second preset temperature, controlling the first refrigerant pump to keep the current load and the running frequency;

and if the temperature of the first inlet end of the evaporator is lower than a second preset temperature, controlling the first refrigerant pump to unload and reduce the frequency.

Further, after controlling the compressor refrigeration circuit and the natural cooling mode to be conducted simultaneously, adjusting the operation parameters according to the temperature of the first inlet end of the evaporator includes:

if the temperature of the first inlet end of the evaporator is higher than a first preset temperature, judging whether the frequency of a first refrigerant pump reaches the maximum frequency, if so, controlling a compressor to load and add frequency, and if not, controlling the first refrigerant pump to load and add frequency;

if the temperature of the first inlet end of the evaporator is less than or equal to a first preset temperature and greater than or equal to a second preset temperature, controlling the first refrigerant pump and the compressor to keep the current load and the current running frequency;

and if the temperature of the first inlet end of the evaporator is lower than a second preset temperature, judging whether the frequency of the compressor reaches the minimum frequency, if so, controlling the first refrigerant pump to unload and reduce the frequency, and if not, controlling the compressor to unload and reduce the frequency.

Further, before acquiring the ambient temperature, the method further comprises:

acquiring the refrigerating capacity demand;

controlling a second refrigerant pump and/or a third refrigerant pump to be started according to the refrigerating capacity requirement; the second refrigerant pump is arranged between the evaporator and the first tail end evaporator, and the third refrigerant pump is arranged between the evaporator and the second tail end evaporator.

Further, according to the refrigerating output demand control second refrigerant pump and/or third refrigerant pump open, include:

if the refrigerating capacity requirement is smaller than a first preset value, controlling the second refrigerant pump to be started;

if the refrigerating capacity requirement is greater than or equal to the first preset value and less than or equal to a second preset value, controlling the third refrigerant pump to be started;

and if the refrigerating capacity requirement is greater than the second preset value, controlling the second refrigerant pump and the third refrigerant pump to be started simultaneously.

Further, after controlling the second refrigerant pump to be started, the method further includes:

after a compressor refrigeration loop and/or a natural cooling loop of the evaporation cooling unit are controlled to be conducted for preset time according to the operation mode, the air supply temperature and the superheat degree of the first end evaporator are obtained;

adjusting the operating frequency of a second refrigerant pump according to the air supply temperature;

adjusting the opening of the first throttle valve according to the superheat degree; the first throttle valve is arranged between the second refrigerant pump and the first tail end evaporator.

Further, adjusting the operating frequency of the second refrigerant pump according to the supply air temperature includes:

if the air supply temperature is higher than a third preset temperature, controlling the operating frequency of the second refrigerant pump to increase;

if the air supply temperature is greater than or equal to a fourth preset temperature and less than or equal to a third preset temperature, controlling the operating frequency of the second refrigerant pump to be unchanged;

and if the air supply temperature is lower than a fourth preset temperature, controlling the running frequency of the second refrigerant pump to be reduced.

Further, adjusting the opening degree of the first throttle valve in accordance with the degree of superheat includes:

if the superheat degree is larger than a third preset value, controlling the opening degree of the first throttle valve to increase;

if the superheat degree is larger than or equal to a fourth preset value and smaller than or equal to a third preset value, controlling the opening degree of the first throttle valve to be unchanged;

and if the superheat degree is smaller than a fourth preset value, controlling the opening degree of the first throttle valve to be reduced.

The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the evaporative cooling unit control method described above.

By applying the technical scheme of the invention, the inlet end and the outlet end of the evaporator are provided with the compressor cooling circuit and the natural cooling circuit in parallel, wherein the compressor cooling circuit comprises the compressor and the evaporative condenser, and the natural cooling circuit comprises the natural cooling coil.

Drawings

FIG. 1 is a block diagram of an evaporative cooling unit according to an embodiment of the present invention;

fig. 2 is a structural view of an evaporative condenser according to an embodiment of the present invention;

FIG. 3 is a block diagram of an evaporative cooling unit according to another embodiment of the present invention;

fig. 4 is a flowchart of a control method of an evaporation chiller unit according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that although the terms first, second, third, etc. may be used to describe the refrigerant pumps in the embodiments of the present invention, the refrigerant pumps should not be limited by these terms. These terms are only used to distinguish between different coolant pumps. For example, the first refrigerant pump may also be referred to as a second refrigerant pump, and similarly, the second refrigerant pump may also be referred to as a first refrigerant pump without departing from the scope of embodiments of the present invention.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.

It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.

Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Example 1

This embodiment provides an evaporation chiller unit, and fig. 1 is a structural diagram of an evaporation chiller unit according to an embodiment of the present invention, and as shown in fig. 3, the evaporation chiller unit includes: compressor refrigeration circuit, which consists of a compressor 1, an evaporative condenser 2 and an evaporator 3, wherein: the exhaust end of the compressor 1 is communicated with the inlet end of the evaporative condenser 2, the outlet end of the evaporative condenser 2 is communicated with the first inlet end of the evaporator 3, the first outlet end of the evaporator 3 is communicated with the air suction end of the compressor, the first inlet end of the evaporator 3 is provided with a detection point 3a, and the first outlet end is provided with a detection point 3 b.

The evaporation cooling unit further comprises a natural cooling loop consisting of a natural cooling coil 4, a first refrigerant pump 5 and an evaporator 3, wherein: the natural cooling coil 4 is arranged outdoors, the inlet end of the natural cooling coil is communicated with the first outlet end of the evaporator 3, and the outlet end of the natural cooling coil is communicated with the first inlet end of the evaporator 3; the first refrigerant pump 5 is disposed on a pipeline between the outlet end of the natural cooling coil 4 and the first inlet end of the evaporator 3. The number of the evaporative condensers 2 and the number of the free cooling coils 4 may be one or more.

Fig. 2 is a structural view of an evaporative condenser according to an embodiment of the present invention, and as shown in fig. 2, the evaporative condenser 2 includes a condensing coil 2a, and further includes a cooling water pump 2b, the cooling water pump 2b is used for driving cooling water to flow to a shower head 2c, and the shower head 2c is used for vaporizing the cooling water; and the water collecting disc 2d is used for collecting the vaporized cooling water, and the vaporized cooling water is evaporated to absorb heat to cool the condensing coil 2 a.

When the compressor operates in a refrigeration mode independently, the compressor 1 and the evaporative condenser 2 are started, high-temperature and high-pressure gaseous refrigerant discharged from the exhaust end of the compressor 1 flows to the evaporative condenser 2, is cooled and condensed in the evaporative condenser 2 to form liquid refrigerant, the liquid refrigerant flows to the evaporator 3, is evaporated and absorbed in the evaporator 3 to generate cold energy, and the formed gaseous refrigerant returns to the air suction end of the compressor 1 to complete the refrigeration cycle of the compressor.

When the independent operation natural cooling mode, natural cooling coil 4 switches on, and the gaseous state refrigerant flows through natural cooling coil, and the cooling condensation forms liquid refrigerant, and liquid refrigerant flow direction evaporimeter 3 evaporates the heat absorption in evaporimeter 3, produces cold volume, and the gaseous state refrigerant of formation gets back to natural cooling coil 4, accomplishes the natural cooling circulation.

When the compressor refrigeration mode and the natural cooling mode are operated simultaneously, the compressor 1 and the evaporative condenser 2 are started, and the natural cooling coil 4 is conducted, on one hand, high-temperature and high-pressure gaseous refrigerant discharged from the exhaust end of the compressor 1 flows to the evaporative condenser 2, is cooled and condensed in the evaporative condenser 2 to form liquid refrigerant, flows to the evaporator 3, is evaporated and absorbs heat in the evaporator 3 to generate cold energy, and the formed gaseous refrigerant returns to the suction end of the compressor 1 to complete the refrigeration cycle of the compressor, on the other hand, the other path of gaseous refrigerant flows through the natural cooling coil 4 to be cooled and condensed to form liquid refrigerant, flows to the evaporator 3, is evaporated and absorbs heat in the evaporator 3 to generate cold energy, and the formed gaseous refrigerant returns to the natural cooling coil 4 to complete the natural cooling cycle.

The inlet end and the outlet end of the evaporator of the evaporation cooling unit are provided with a compressor cooling circuit and a natural cooling circuit in parallel, wherein the compressor cooling circuit comprises a compressor, an evaporative condenser and an evaporator, the natural cooling circuit comprises a natural cooling coil 4, a first refrigerant pump 5 and an evaporator 3, and by means of the design, the natural cooling circulation and the compressor cooling circulation can be controlled to independently operate or operate simultaneously, and the energy efficiency is improved.

Example 2

In this embodiment, another evaporation cooling unit is provided, and fig. 3 is a structural diagram of an evaporation cooling unit according to another embodiment of the present invention, in order to control the conduction states of a compressor refrigeration circuit and a natural cooling circuit and further switch the operation modes, as shown in fig. 3, the above-mentioned unit further includes: the first valve 6 is arranged on a pipeline between the inlet end of the natural cooling coil 4 and the first outlet end of the evaporator 3 and is used for controlling whether the pipeline between the inlet end of the natural cooling coil 4 and the first outlet end of the evaporator 3 is communicated or not; and the second valve 7 is arranged on a pipeline between the outlet end of the natural cooling coil 4 and the first inlet end of the evaporator 3 and used for controlling whether the pipeline between the outlet end of the natural cooling coil 4 and the first inlet end of the evaporator 3 is communicated or not. Specifically, when the natural cooling mode is operated alone or the compressor cooling mode and the natural cooling mode are operated simultaneously, the first valve 6 and the second valve 7 are opened, and when the compressor cooling mode is operated alone, the first valve 6 and the second valve 7 are closed.

Similarly, the unit further comprises: a third valve 8, which is arranged on the pipeline between the first outlet end of the evaporator 3 and the suction end of the compressor 1 and is used for controlling whether the pipeline between the first outlet end of the evaporator 3 and the suction end of the compressor 1 is conducted or not; and a fourth valve 9, which is arranged on the pipeline between the outlet end of the evaporative condenser 2 and the first inlet end of the evaporator 3, and is used for controlling whether the pipeline between the outlet end of the evaporative condenser 2 and the first inlet end of the evaporator 3 is conducted or not. Specifically, when compressor refrigeration mode alone, or when running compressor refrigeration mode and natural cooling mode simultaneously, third valve 8 and fourth valve 9 are opened, and when the natural cooling mode of alone operation, third valve 8 and fourth valve 9 are closed, and in this embodiment, third valve 8 and fourth valve 9 are the ooff valve, can select for use the solenoid valve.

In order to transfer the cold generated by the evaporator 3 to the indoor space, as shown in fig. 3, the unit further comprises: a first end evaporator 10, the inlet end of which communicates with the second outlet end of the evaporator 3, and the outlet end of which communicates with the second inlet end of the evaporator 3; a second end evaporator 11, which is arranged in parallel with the first end evaporator 10, and has an inlet end communicated with a second outlet end of the evaporator 3 and an outlet end communicated with a second inlet end of the evaporator 3; the evaporator 3 and the first end evaporator 10 or the second end evaporator 11 respectively form an end circulation loop, wherein the capacity of the second end evaporator 11 is larger than that of the first end evaporator 10, different end evaporators are controlled to operate according to different refrigerating capacity requirements, the refrigerating capacity requirements of users are met to the maximum degree, and meanwhile, energy is saved.

In order to drive the flow of the refrigerant, as shown in fig. 3, the unit further includes: a second refrigerant pump 12 disposed between the second outlet end of the evaporator 3 and the inlet end of the first end evaporator 10, for driving the refrigerant to flow from the second outlet end of the evaporator 3 to the inlet end of the first end evaporator 10; similarly, the unit further comprises a third refrigerant pump 13, arranged between the second outlet end of the evaporator 3 and the inlet end of the second end evaporator 11, for driving refrigerant from the second outlet end of the evaporator 3 to the inlet end of the second end evaporator 11.

In order to control the refrigerant flow in the pipeline, and then control refrigeration effect, this unit still includes: a first throttle valve 14, which is disposed on the pipeline between the second refrigerant pump 12 and the inlet end of the first end evaporator 10, and is used for controlling the refrigerant flow in the pipeline between the second refrigerant pump 12 and the inlet end of the first end evaporator 10, so as to control the refrigeration effect of the first end evaporator 10; and a second throttle valve 15, which is disposed on the pipeline between the third refrigerant pump 13 and the inlet end of the second end evaporator 11, and is used for controlling the refrigerant flow in the pipeline between the third refrigerant pump 13 and the inlet end of the second end evaporator 11, so as to control the refrigeration effect of the second end evaporator 11.

Similarly, the unit further comprises: and the third throttle valve 16 is arranged on a pipeline between the outlet end of the evaporative condenser 2 and the first inlet end of the evaporator 3 and is used for controlling the refrigerant flow in the pipeline between the outlet end of the evaporative condenser and the first inlet end of the evaporator 3 so as to control the refrigeration effect of the evaporator 3.

In the present embodiment, the first throttle 14, the second throttle 15, and the third throttle 16 may be electronic expansion valves.

In order to remove the excess moisture and impurities in the pipeline, the unit further comprises: and the drying filter 17 is arranged on the pipeline between the outlet end of the evaporative condenser 2 and the first inlet end of the evaporator 3, and is used for absorbing moisture in the pipeline and filtering impurities in the pipeline, so that the refrigeration effect of the evaporator 3 is improved.

In order to improve heat exchange efficiency, the unit further comprises: and the fan 18 is arranged beside the evaporative condenser 2 and/or the natural cooling coil 4 and used for accelerating the air flow outside the evaporative condenser and/or the natural cooling coil and improving the heat exchange efficiency.

Example 3

The present embodiment provides an evaporation cooling unit control method, which is applied to the evaporation cooling unit in the above embodiments, and fig. 4 is a flowchart of an evaporation cooling unit control method according to an embodiment of the present invention, as shown in fig. 4, the method includes:

s101, acquiring the ambient temperature.

When ambient temperature is higher, can't realize the refrigeration through natural cooling circulation, when outdoor environment is in a certain temperature interval, can't satisfy the refrigerating output demand through natural cooling circulation alone, and when ambient temperature is lower, can satisfy the refrigerating output demand through natural cooling circulation alone, consequently, before the operation of control evaporation cold set, need acquire ambient temperature earlier, when concrete implementation, can be through setting up temperature sensor outdoors, acquire ambient temperature.

S102, determining an operation mode of the evaporation cooling unit according to the range of the environment temperature; the operation modes comprise a compressor refrigeration mode, a natural cooling mode and a mixed refrigeration mode. The hybrid cooling mode refers to a mode in which the compressor cooling mode and the natural cooling mode are simultaneously operated.

According to the above, the ambient temperature determines whether natural cooling circulation refrigeration can be adopted, and whether the refrigeration capacity requirement can be met through the natural cooling circulation refrigeration, so that the refrigeration mode, the natural cooling mode or the mixed refrigeration mode of the running compressor of the evaporation chiller unit is determined according to the range of the ambient temperature.

S103, controlling the conduction of a compressor refrigeration loop and/or a natural cooling loop of the evaporation cooling unit according to the operation mode; wherein, the compressor refrigeration circuit and the natural cooling circuit are arranged in the same evaporation cooling unit.

According to the control method of the evaporation cooling unit, the operation mode of the evaporation cooling unit is determined according to the range of the environment temperature, the conduction of the compressor refrigeration loop and/or the natural cooling loop of the evaporation cooling unit is controlled according to the operation mode of the evaporation cooling unit, the appropriate operation mode can be selected according to the external environment temperature, and the energy efficiency is improved.

Example 4

In this embodiment, another evaporation chiller unit control method is provided, in order to select an operation mode matched with an ambient temperature according to the ambient temperature, in step S102, the method specifically includes: if the ambient temperature is greater than a first threshold value, determining that the operation mode of the evaporation cooling unit is a compressor refrigeration mode; if the ambient temperature is less than or equal to the first threshold and greater than the second threshold, determining that the operation mode of the evaporation cooling unit is a mixed refrigeration mode; and if the ambient temperature is less than or equal to the second threshold value, determining that the operation mode of the evaporation cooling unit is a natural cooling mode.

If the ambient temperature is greater than a first threshold value, for example, greater than 0 ℃, the refrigeration cannot be realized through natural cooling circulation, so that the refrigeration mode of the evaporator-chiller unit running compressor needs to be controlled; if the ambient temperature is less than or equal to 0 ℃ and greater than-10 ℃, the refrigeration can be realized through the natural cooling circulation, but the refrigeration capacity requirement of the user cannot be met only through the natural cooling circulation, so that a natural cooling mode and a compressor refrigeration mode, namely a mixed refrigeration mode, need to be operated simultaneously, and if the ambient temperature is less than or equal to-10 ℃, the refrigeration capacity requirement of the user can be met through the natural cooling circulation, so that in order to save energy, the compressor refrigeration circulation can be closed, and the evaporation cooling unit can be controlled to operate the natural cooling mode alone.

After the operation mode of the evaporation cooling unit is determined, the corresponding refrigeration circuit needs to be conducted to implement the operation of the evaporation cooling unit, and therefore, the step S103 includes: if the running mode of the evaporation cooling unit is determined to be the compressor refrigeration mode, controlling the conduction of a compressor refrigeration loop, specifically controlling the starting of the compressor, the evaporation condenser and the fan, and closing the first refrigerant pump; simultaneously controlling the first valve and the second valve to close, and controlling the third valve and the fourth valve to open; if the operation mode of the evaporation cooling unit is determined to be a natural cooling mode, controlling the conduction of a natural cooling loop, specifically controlling the starting of a first refrigerant pump and a fan and controlling the closing of a compressor and an evaporative condenser; simultaneously controlling the first valve and the second valve to be opened, and closing the third valve and the fourth valve; if the running mode of the evaporation cooling unit is determined to be a mixed cooling mode, controlling the compressor cooling loop and the natural cooling mode to be conducted simultaneously, and specifically controlling the compressor, the evaporative condenser, the first refrigerant pump and the fan to be started; simultaneously controlling the first valve and the second valve, and the third valve and the fourth valve to be opened; the first valve is arranged on a pipeline between the inlet end of the natural cooling coil and the first outlet end of the evaporator, the second valve is arranged on a pipeline between the outlet end of the natural cooling coil and the first inlet end of the evaporator, the third valve is arranged on a pipeline between the first outlet end of the evaporator and the air suction end of the compressor, and the fourth valve is arranged on a pipeline between the outlet end of the evaporative condenser and the first inlet end of the evaporator.

After controlling a certain mode of operation of the evaporation cooling unit for a period of time, the refrigeration effect may not match with the demand of the refrigeration capacity of the user, at this moment, the operation parameter needs to be adjusted, and the difference between the temperature of the first inlet end of the evaporator and the preset temperature of the first outlet end can reflect the current refrigeration effect, therefore, after the compressor refrigeration loop and/or the natural cooling loop of the evaporation cooling unit are controlled to be switched on according to the operation mode, the method further comprises: the operating parameter is adjusted based on a temperature at the first inlet end of the evaporator.

After controlling compressor refrigeration circuit to switch on, according to the first entrance point temperature regulation operating parameter of evaporimeter, specifically include: if the temperature of the first inlet end of the evaporator is higher than a first preset temperature, the current refrigeration effect is poor, and the compressor needs to be controlled to load and add frequency to improve the refrigeration effect; if the temperature of the first inlet end of the evaporator is less than or equal to a first preset temperature and is greater than or equal to a second preset temperature, the refrigeration effect can meet the requirement, and the compressor is controlled to keep the current load and the running frequency; and if the temperature of the first inlet end of the evaporator is lower than the second preset temperature, the current refrigeration effect is better, and the unloading frequency reduction of the compressor is controlled for further energy conservation.

After controlling the natural cooling circuit to be conducted, adjusting the operation parameters according to the temperature of the first inlet end of the evaporator, specifically comprising: if the temperature of the first inlet end of the evaporator is higher than a first preset temperature, the current refrigeration effect is poor, and the first refrigerant pump needs to be controlled to load and add frequency to improve the refrigeration effect; if the temperature of the first inlet end of the evaporator is less than or equal to a first preset temperature and is greater than or equal to a second preset temperature, the refrigeration effect can meet the requirement, and the first refrigerant pump is controlled to keep the current load and the operation frequency; if the temperature of the first inlet end of the evaporator is lower than the second preset temperature, the current refrigeration effect is better, and the first refrigerant pump is controlled to unload and reduce the frequency for further energy conservation.

After controlling compressor refrigeration circuit and natural cooling mode to switch on simultaneously, according to the first entrance point temperature regulation operating parameter of evaporimeter, specifically include: if the temperature of the first inlet end of the evaporator is higher than a first preset temperature, the refrigeration effect is poor, the load of the compressor or the load of the first refrigerant pump needs to be increased, and the compressor consumes more energy relative to the first refrigerant pump, so that the first refrigerant pump is preferentially controlled to load and add frequency from the energy-saving perspective, and the compressor is controlled to load and add frequency under the condition that the first refrigerant pump reaches the maximum frequency, so that whether the frequency of the first refrigerant pump reaches the maximum frequency or not needs to be judged at the moment, if so, the compressor is controlled to load and add frequency, and if not, the first refrigerant pump is controlled to load and add frequency; if the temperature of the first inlet end of the evaporator is less than or equal to a first preset temperature and is greater than or equal to a second preset temperature, the refrigeration effect can meet the requirement, and the first refrigerant pump and the compressor are controlled to keep the current load and the current running frequency; if the temperature of the first inlet end of the evaporator is lower than the second preset temperature, the current refrigeration effect is good, the load of the compressor or the load of the first refrigerant pump can be reduced, the compressor consumes more energy relative to the first refrigerant pump, therefore, the compressor is preferentially controlled to unload the frequency reduction from the energy-saving perspective, and the first refrigerant pump is controlled to unload the frequency reduction under the condition that the compressor reaches the minimum frequency, so that whether the frequency of the compressor reaches the minimum frequency needs to be judged, if so, the first refrigerant pump is controlled to unload the frequency reduction, and if not, the compressor is controlled to unload the frequency reduction.

The first preset temperature and the second preset temperature are determined according to a first preset outlet end temperature of the evaporator, for example, the first outlet end temperature of the evaporator is set to be Ta, a first preset amount Δ T1, namely Ta + Δ T1, is increased on the basis of Ta as the first preset temperature, and a second preset amount Δ T2, namely Ta- Δ T2, is decreased on the basis of Ta as the second preset temperature, wherein Δ T1 and Δ T2 may be equal, may also be unequal, and preferably are equal.

Before controlling the operation of the compressor refrigeration cycle or the natural cooling cycle, the method needs to control the opening of the end evaporator arranged in the room, and in order to better meet the refrigeration capacity requirement of the user, before obtaining the ambient temperature, the method further comprises the following steps: acquiring the refrigerating capacity demand; in a specific embodiment, the current indoor temperature may be detected, and a difference between the current indoor temperature and a target temperature is calculated as a cooling capacity requirement, for example, if the current indoor temperature is 30 ℃, the target temperature is 25 ℃, the cooling capacity requirement is 5 ℃; controlling the second refrigerant pump and/or the third refrigerant pump to be started according to the refrigerating capacity requirement; the second refrigerant pump is arranged between the evaporator and the first tail end evaporator, and the third refrigerant pump is arranged between the evaporator and the second tail end evaporator.

In order to realize the matching of the total capacity of the opened terminal evaporator and the user requirement, the second refrigerant pump and/or the third refrigerant pump are controlled to be opened according to the refrigerating capacity requirement, and the method comprises the following steps: if the refrigerating capacity demand is smaller than the first preset value, the refrigerating capacity demand of a user is low, namely the refrigerating load is low, the second refrigerant pump is controlled to be started, the first end evaporator is enabled to operate, and the refrigerating capacity demand can be met; if the refrigerating capacity demand is greater than or equal to the first preset value and less than or equal to the second preset value, the refrigerating capacity demand of a user is indicated to be in a medium level, namely the refrigerating load is medium, the third refrigerant pump is controlled to be started, the second tail end evaporator is enabled to operate, and the refrigerating capacity demand can be met; if the refrigerating capacity demand is larger than the second preset value, the refrigerating capacity demand is high, namely the refrigerating load is high, the second refrigerant pump and the third refrigerant pump are required to be controlled to be started simultaneously, and the first tail end evaporator and the second tail end evaporator run simultaneously to meet the refrigerating capacity demand.

Taking the case of low refrigeration demand as an example, after the second refrigerant pump is controlled to be started, the ambient temperature is obtained; controlling the conduction of a compressor refrigeration loop and/or a natural cooling loop of the evaporation cooling unit according to the operation mode, and obtaining the air supply temperature and the superheat degree of the first end evaporator after a certain refrigeration effect is achieved after preset time; adjusting the operating frequency of the second refrigerant pump according to the air supply temperature; adjusting the opening of the first throttle valve according to the superheat degree; the first throttle valve is arranged on a pipeline between the second refrigerant pump and the inlet end of the first end evaporator. Specifically, adjusting the operating frequency of the second refrigerant pump according to the supply air temperature includes: if the air supply temperature is higher than a third preset temperature, controlling the operating frequency of the second refrigerant pump to increase; if the air supply temperature is greater than or equal to the fourth preset temperature and less than or equal to the third preset temperature, controlling the operating frequency of the second refrigerant pump to be unchanged; and if the air supply temperature is lower than the fourth preset temperature, controlling the running frequency of the second refrigerant pump to be reduced. Specifically, adjusting the opening degree of the first throttle valve in accordance with the degree of superheat includes: if the superheat degree is larger than a third preset value, controlling the opening degree of the first throttle valve to increase so as to reduce the superheat degree; if the superheat degree is larger than or equal to a fourth preset value and smaller than or equal to a third preset value, controlling the opening of the first throttle valve to be unchanged, and keeping the superheat degree unchanged; if the degree of superheat is less than the fourth preset value, the opening degree of the first throttle valve is controlled to be decreased to increase the degree of superheat.

Similarly, if the refrigeration demand is at a medium level, controlling the third refrigerant pump to be started, and acquiring the ambient temperature after controlling the third refrigerant pump to be started; controlling the conduction of a compressor refrigeration loop and/or a natural cooling loop of the evaporation cooling unit according to the operation mode, and obtaining the air supply temperature and the superheat degree of the second end evaporator after a certain refrigeration effect is achieved after preset time; adjusting the operating frequency of the third refrigerant pump according to the air supply temperature; adjusting the opening of the second throttle valve according to the superheat degree; the second throttle valve is arranged on a pipeline between the third refrigerant pump and the inlet end of the second tail end evaporator. Specifically, adjusting the operating frequency of the third refrigerant pump according to the supply air temperature includes: if the air supply temperature is higher than a fifth preset temperature, controlling the running frequency of the third refrigerant pump to be increased; if the air supply temperature is greater than or equal to the sixth preset temperature and less than or equal to the fifth preset temperature, controlling the operating frequency of the third refrigerant pump to be unchanged; and if the air supply temperature is lower than the sixth preset temperature, controlling the running frequency of the third refrigerant pump to be reduced. Specifically, adjusting the opening degree of the second throttle valve in accordance with the degree of superheat includes: if the superheat degree is larger than a fifth preset value, controlling the opening degree of the second throttle valve to increase so as to reduce the superheat degree; if the superheat degree is larger than or equal to a sixth preset value and smaller than or equal to a fifth preset value, controlling the opening degree of the second throttle valve to be unchanged, and keeping the superheat degree unchanged; if the degree of superheat is less than a sixth preset value, the opening degree of the second throttle valve is controlled to be decreased to increase the degree of superheat.

It should be noted that, if the refrigeration demand is high, the second refrigerant pump and the third refrigerant pump are controlled to be simultaneously started, and after the second refrigerant pump and the third refrigerant pump are controlled to be simultaneously started, the frequency of the second refrigerant pump and the frequency of the third refrigerant pump are adjusted.

Example 5

The embodiment provides another evaporation cooling unit control method, which is applied to the evaporation cooling unit in the above embodiment, and the method includes:

firstly, controlling a refrigeration cycle.

1. When the ambient temperature T > a first threshold T1, the compressor cooling mode is operated:

the compressor 1, the evaporative condenser 2, the third throttle valve 16, the evaporator 3 and the compressor 1 form a compressor refrigeration loop, and the refrigeration capacity is provided by the compressor refrigeration cycle.

Component operation control mode: the compressor 1 is started, the fan 18 and the cooling water pump 2b of the evaporative condenser 2 are started, and the first refrigerant pump 5 is closed; and simultaneously controlling the first valve 6 and the second valve 7 to be closed and the third valve 8 and the fourth valve 9 to be opened. The variable-frequency variable-volume compressor is adopted for variable-frequency operation, and the efficiency and the reliability of the unit are improved.

The adjusting mode of the variable frequency compressor is as follows: the first outlet end temperature preset value of the evaporator is set to Ta.

When the actual temperature of the temperature test point 3a at the first inlet end of the evaporator is more than Ta +1, the compressor is controlled to be loaded and frequency-added to operate.

And when the actual temperature of the temperature test point 3a at the first inlet end of the evaporator is less than Ta-1, controlling the compressor to unload and carry out frequency reduction operation.

And controlling the compressor to keep the current load and the running frequency when the actual temperature [ Ta +1, Ta-1] of the temperature test point 3a at the first inlet end of the evaporator ranges.

It should be noted that, a preset temperature value at the inlet end of the evaporator may also be set, the actual temperature at the detecting point 3b at the first outlet end of the evaporator is detected, the actual temperature is compared with the preset temperature value at the inlet end of the evaporator, and the load and frequency operation of the inverter compressor are adjusted according to the comparison result.

2. When the ambient temperature T is less than or equal to a second threshold value T2, the natural cooling mode is operated:

the first refrigerant pump 5, the evaporator 3, the natural cooling coil 4 and the first refrigerant pump 5 form a natural cooling loop, and the refrigerating capacity is provided by natural cooling circulation.

Component operation control mode: controlling the first refrigerant pump 5 and the fan 18 to be started, and controlling the compressor 1 and the cooling water pump 2b of the evaporative condenser 2 to be closed; simultaneously controlling the first valve 6 and the second valve 7 to be opened, and the third valve 8 and the fourth valve 9 to be closed; the first refrigerant pump 5 is used as a power source, heat in the evaporator 4 is driven into the natural cooling coil 4 through the refrigerant pump 5 and is discharged outdoors through the fan 18, and therefore refrigeration is achieved; the refrigerating capacity of the whole machine is controlled by adjusting the load and the frequency of the first refrigerant pump 5.

The first refrigerant pump adjusting mode: the first outlet end temperature preset value of the evaporator is set to Ta.

And when the actual temperature of the temperature test point 3a at the first inlet end of the evaporator is more than Ta +1, controlling the first refrigerant pump 5 to carry out loading and frequency-adding operation.

And when the actual temperature of the temperature test point 3a at the first inlet end of the evaporator is less than Ta-1, controlling the first refrigerant pump 5 to carry out unloading and frequency reduction operation.

And when the actual temperature [ Ta +1, Ta-1] of the temperature test point 3a at the first inlet end of the evaporator ranges, controlling the first refrigerant pump 5 to keep the current load and frequency running.

It should be noted that, a preset temperature value at the inlet end of the evaporator may also be set, the actual temperature at the detection point 3b at the first outlet end of the evaporator is detected, the actual temperature is compared with the preset temperature value at the inlet end of the evaporator, and the load and frequency operation of the first refrigerant pump are adjusted according to the comparison result.

3. When the first threshold value T1 is larger than or equal to the environmental temperature T and larger than the second threshold value T2, the mixed refrigeration mode is operated:

the first refrigerant pump 5, the evaporator 3, the natural cooling coil 4 and the first refrigerant pump 5 form a natural cooling loop, and part of the refrigerating capacity is provided by natural cooling circulation.

The compressor 1, the evaporative condenser 2, the third throttle valve 16, the evaporator 3 and the compressor 1 form a compressor refrigeration loop, and the other part of the refrigeration capacity is provided by the compressor refrigeration cycle.

Component operation control mode: the compressor 1 is started, the fan 18 and the cooling water pump 2b of the evaporative condenser 2 are started, and the first refrigerant pump 5 is started; and simultaneously controlling the first valve 6 and the second valve 7 to be opened, and controlling the third valve 8 and the fourth valve 9 to be opened.

Because the compressor power consumption is higher, under mixed mode, if the refrigerating capacity is lower, the load and the frequency of first refrigerant pump are preferentially increased, if the refrigerating capacity is higher, the load and the frequency of inverter compressor are preferentially reduced.

And when the actual temperature of the temperature test point 3a at the first inlet end of the evaporator is greater than Ta +1, controlling the first refrigerant pump 5 to carry out loading and frequency-adding operation, and if the frequency of the first refrigerant pump 5 reaches the maximum frequency and cannot be increased any more, and the actual temperature of the temperature test point 3a at the first inlet end of the evaporator still cannot reach the interval range of [ Ta-1 and Ta +1], controlling the compressor to carry out loading and frequency-adding operation.

And when the actual temperature of the temperature test point 3a at the first inlet end of the evaporator is less than or equal to Ta-1, controlling the compressor to carry out unloading frequency reduction operation, and if the frequency of the compressor reaches the minimum frequency and the actual temperature of the temperature test point 3a at the first inlet end of the evaporator still cannot reach the interval range of [ Ta-1, Ta +1], controlling the first refrigerant pump 5 to carry out unloading frequency reduction operation.

When the actual temperature of the temperature test point 3a at the first inlet end of the evaporator is in the interval range of [ Ta-1, Ta +1], the first refrigerant pump 5 and the compressor 1 both keep the current load and frequency operation.

And secondly, controlling a tail end evaporator.

1. And (4) low-load operation.

The first end loop is a circulation loop formed by a second refrigerant pump 12, a first throttle valve 14, a first end evaporator 10, an evaporator 3 and a second refrigerant pump 12, the second refrigerant pump 12 is started before the refrigeration cycle is started, the first throttle valve 14 is opened, a third refrigerant pump 13 and a second throttle valve 15 are closed, the frequency of the second refrigerant pump 12 is adjusted according to the air supply temperature of the first end evaporator 10 after the refrigeration cycle is started for a preset time, and meanwhile, the opening degree of the first throttle valve 14 is adjusted according to the superheat degree of the first end evaporator 10. Specifically, adjusting the operating frequency of the second refrigerant pump 12 according to the supply air temperature includes: if the air supply temperature is higher than the third preset temperature, controlling the operating frequency of the second refrigerant pump 12 to increase; if the air supply temperature is greater than or equal to the fourth preset temperature and less than or equal to the third preset temperature, controlling the operating frequency of the second refrigerant pump 12 to be unchanged; and if the air supply temperature is lower than the fourth preset temperature, controlling the running frequency of the second refrigerant pump 12 to be reduced. Specifically, adjusting the opening degree of the first throttle valve 14 in accordance with the degree of superheat includes: if the degree of superheat is greater than the third preset value, the opening degree of the first throttle valve 14 is controlled to be increased to reduce the degree of superheat; if the superheat degree is larger than or equal to a fourth preset value and smaller than or equal to a third preset value, controlling the opening of the first throttle valve to be unchanged, and keeping the superheat degree unchanged; if the degree of superheat is less than the fourth preset value, the opening degree of the first throttle valve 14 is controlled to be decreased to increase the degree of superheat.

2. And (4) medium load operation.

The second end loop is a circulation loop formed by a third refrigerant pump 13, a second throttle valve 15, a second end evaporator 11, an evaporator 3 and a third refrigerant pump 13, the third refrigerant pump 13 is started before the refrigeration cycle is started, the second throttle valve 15 is started, the second refrigerant pump 12 and the first throttle valve 14 are closed, the frequency of the third refrigerant pump 13 is adjusted according to the air supply temperature of the second end evaporator 11 after the refrigeration cycle is started for a preset time, and the opening degree of the second throttle valve 15 is adjusted according to the superheat degree of the second end evaporator 11.

3. And (4) high-load operation.

The first end loop and the second end loop are simultaneously conductive. Before the refrigeration cycle is started, the second refrigerant pump 12 and the third refrigerant pump 13 are started simultaneously, the first throttle valve 14 and the second throttle valve 15 are started simultaneously, after the refrigeration cycle is started for a preset time, the frequency of the second refrigerant pump 12 is adjusted according to the air supply temperature of the first tail end evaporator 10, and meanwhile, the opening degree of the first throttle valve 14 is adjusted according to the superheat degree of the first tail end evaporator 10; the frequency of the third refrigerant pump 13 is adjusted according to the blowing air temperature of the second end evaporator 11, and the opening degree of the second throttle valve 15 is adjusted according to the superheat degree of the second end evaporator 11.

According to the control method of the evaporation cooling unit, the operation mode of the evaporation cooling unit is determined according to the range of the environment temperature, the conduction of the compressor refrigeration loop and/or the natural cooling loop of the evaporation cooling unit is controlled according to the operation mode of the evaporation cooling unit, the appropriate operation mode can be selected according to the external environment temperature, and the energy efficiency is improved; the high-efficiency operation under the wide load is realized by adjusting the frequency of the compressor and the refrigerant pump and the capacity of the tail end evaporator under different load requirements.

Example 6

The embodiment provides a refrigeration device, which comprises the evaporation refrigerating unit and is used for realizing refrigeration cycles in different temperature interval ranges. The refrigeration equipment at least comprises one of the following components: refrigerator, air conditioner.

Example 7

The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the evaporative cooling unit control method in the above-described embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An evaporative cooling unit, said unit comprising:

2. The aggregate according to claim 1, characterized in that it further comprises:

3. The aggregate according to claim 1, characterized in that it further comprises:

4. The aggregate according to claim 1, characterized in that it further comprises:

5. The aggregate according to claim 4, characterized in that it further comprises:

6. The aggregate according to claim 5, characterized in that it further comprises:

7. The aggregate according to claim 1, characterized in that it further comprises:

8. The aggregate according to claim 1, characterized in that it further comprises:

9. The aggregate according to claim 1, characterized in that it further comprises:

10. Refrigeration apparatus, characterized in that it comprises an evaporative cooling unit as claimed in any one of claims 1 to 9.

11. The refrigeration appliance according to claim 10, characterized in that it comprises at least one of the following: refrigerator, air conditioner.

12. An evaporation chiller unit control method applied to the evaporation chiller unit of any one of claims 1 to 9, the method comprising:

acquiring an ambient temperature;

13. The method of claim 12, wherein determining the operating mode of the evaporative cooling unit based on the range of the ambient temperature includes:

14. The method of claim 13, wherein controlling compressor refrigeration circuit and/or natural cooling circuit conductance of an evaporative cooling unit according to the operating mode comprises:

15. The method of claim 14,

controlling the compressor refrigeration circuit to conduct, including: controlling the compressor, the evaporative condenser and the fan to be started, and closing the first refrigerant pump; simultaneously controlling the first valve and the second valve to close, and controlling the third valve and the fourth valve to open;

16. The method of claim 14, wherein after controlling the compressor refrigeration circuit and/or the natural cooling circuit of the evaporative cooling unit to conduct according to the operating mode, the method further comprises:

17. The method of claim 16, wherein controlling the compressor refrigeration circuit to conduct and adjusting the operating parameter based on the temperature at the first inlet end of the evaporator comprises:

18. The method of claim 16, wherein controlling the natural cooling loop to conduct and adjusting the operating parameter based on a temperature at the first inlet end of the evaporator comprises:

19. The method of claim 16, wherein controlling the compressor refrigeration circuit and the free cooling mode to be simultaneously switched on and adjusting the operating parameter based on the first inlet end temperature of the evaporator comprises:

20. The method of claim 12, wherein prior to obtaining the ambient temperature, the method further comprises:

acquiring the refrigerating capacity demand;

21. The method of claim 20, wherein controlling the second refrigerant pump and/or the third refrigerant pump to turn on based on the cooling capacity demand comprises:

22. The method of claim 21, wherein after controlling the second refrigerant pump to turn on, the method further comprises:

23. The method of claim 22, wherein adjusting the operating frequency of the second refrigerant pump based on the supply air temperature comprises:

24. The method of claim 22 wherein adjusting the opening of the first throttle valve based on the superheat comprises:

25. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 12 to 24.