CN220981633U

CN220981633U - Multi-evaporation-temperature water chilling unit capable of adjusting cooling capacity

Info

Publication number: CN220981633U
Application number: CN202323003596.4U
Authority: CN
Inventors: 查晓冬; 苏鹏飞
Original assignee: Bixin Energy Technology Suzhou Co ltd
Current assignee: Bixin Energy Technology Suzhou Co ltd
Priority date: 2023-11-07
Filing date: 2023-11-07
Publication date: 2024-05-17
Anticipated expiration: 2033-11-07

Abstract

The utility model discloses a multi-evaporation-temperature water chilling unit capable of adjusting cooling capacity. The unit comprises a condenser, at least two evaporators, at least two compressors, at least two electronic expansion valves and an adjusting pipeline, wherein each evaporator is connected with the condenser through two pipelines, each compressor is respectively arranged on one pipeline connected with the condenser of each evaporator, each electronic expansion valve is respectively arranged on the other pipeline connected with the condenser of each evaporator, and each end of the adjusting pipeline is respectively connected with each evaporator. The multi-evaporation-temperature water chilling unit with adjustable cold quantity can realize different chilled water supply temperatures according to the fixed-frequency unit and different user requirements, and can adjust the cold quantity at the same time, so that the partial load requirement of one evaporator is solved, and the problems of low hot gas bypass efficiency during partial load and frequent startup and shutdown caused by incapability of reducing load are avoided.

Description

Multi-evaporation-temperature water chilling unit capable of adjusting cooling capacity

Technical Field

The utility model relates to the field of water chilling units, in particular to a multi-evaporation-temperature water chilling unit capable of adjusting cooling capacity.

Background

The traditional water chiller can only realize the operation under a single working condition generally, but cannot operate under different working conditions at the same time, so that the traditional water chiller cannot simultaneously have different chilled water supply temperatures, and different users can be cooled respectively. Therefore, in order to meet the demands of different users, a plurality of units are often required to be arranged, and time and labor are wasted.

In addition, even if different users are simultaneously supplied with cold respectively by some water chilling units, the refrigerating capacity of the fixed-frequency compressor cannot be reasonably adjusted to meet the demands of different users, and especially under partial load, the refrigerating capacity can be adjusted only by adopting some other methods, for example, the refrigerating capacity can be adjusted by adopting frequent on-off, but huge fluctuation of water supply temperature can be caused, for example, the refrigerating capacity can be adjusted by adopting hot gas bypass, but the problem of low efficiency can be caused.

Disclosure of utility model

In order to solve the problems, the utility model provides a multi-evaporation-temperature water chilling unit capable of adjusting the cooling capacity.

According to one aspect of the present utility model, there is provided a multi-evaporation temperature chiller with adjustable cooling capacity, comprising:

A condenser for producing high pressure refrigerant vapor into high pressure refrigerant liquid;

At least two evaporators, each evaporator is connected with the condenser through two pipelines and is used for preparing low-pressure refrigerant vapor from low-pressure gas-liquid two-phase refrigerant;

At least two compressors, each of which is installed on one of the pipes connected to the condenser of each of the evaporators, for compressing low-pressure refrigerant vapor into high-pressure refrigerant vapor;

At least two electronic expansion valves, each of which is respectively arranged on the other pipeline of each evaporator connected with the condenser and is used for preparing high-pressure refrigerant liquid into low-pressure gas-liquid two-phase refrigerant;

and each end of the adjusting pipeline is respectively connected with each evaporator.

In some embodiments, each evaporator is connected to the condenser by a compression line, and each compressor is mounted on each compression line. It is beneficial to describe the specific mounting locations of each compressor.

In some embodiments, each evaporator is connected to the condenser by a throttle line, and each electronic expansion valve is respectively installed on each throttle line. It is beneficial to describe the specific installation position of each electronic expansion valve.

In some embodiments, the condenser is provided with a water inlet and a water outlet. The condenser has the advantages that cooling water can flow into the condenser through the water inlet and the water outlet.

In some embodiments, each of the evaporators is provided with a water inlet and a water outlet. The evaporator has the advantages that freezing water can flow into each evaporator through the water inlet and the water outlet.

In some embodiments, a thermal regulating valve is mounted on the regulating line. The heat regulating valve has the advantages that the opening and closing of the regulating pipeline can be controlled through the heat regulating valve, so that the corresponding state of the unit is changed.

In some embodiments, the evaporation temperature of each of the evaporators is different when the heat regulating valve is opened. The evaporator has the advantages that evaporation temperature difference is generated among the evaporators, so that the adjustment of refrigerating capacity is realized.

In some embodiments, the refrigerant is R-22, R-407c, or R-410a. This is beneficial in that alternative types of refrigerants are described, as well as other suitable refrigerant types may be selected as desired.

The multi-evaporation-temperature water chilling unit with adjustable cold quantity can realize different chilled water supply temperatures according to the fixed-frequency unit and different user requirements, and can adjust the cold quantity at the same time, so that the partial load requirement of one evaporator is solved, and the problems of low hot gas bypass efficiency during partial load and frequent startup and shutdown caused by incapability of reducing load are avoided.

Drawings

FIG. 1 is a schematic diagram of a multi-evaporating-temperature chiller with adjustable cooling capacity according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a portion of the multi-evaporating-temperature chiller with adjustable cooling capacity shown in FIG. 1;

fig. 3 is a schematic diagram of a part of the multi-evaporation-temperature water chiller with adjustable cooling capacity shown in fig. 1.

In the figure: condenser 1, evaporator 2, compressor 3, electronic expansion valve 4, adjusting pipeline 5, compression pipeline 6, throttle pipeline 7, heat regulating valve 8.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

As shown in fig. 1 to 3, the unit mainly comprises a condenser 1 and at least two evaporators 2 (two are taken as an example in the embodiment and the drawing), at least two compressors 3, at least two electronic expansion valves 4 and a regulating pipeline 5.

The condenser 1 may be used to make high pressure refrigerant vapor into high pressure refrigerant liquid, while the evaporator 2 may be used to make low pressure refrigerant vapor from low pressure gas-liquid two-phase refrigerant, the compressor 3 may be used to compress low pressure refrigerant vapor into high pressure refrigerant vapor, and the electronic expansion valve 4 may be used to make high pressure refrigerant liquid into low pressure gas-liquid two-phase refrigerant.

Preferably, the refrigerant may be selected from R-22, R-407c or R-410a, or other suitable refrigerant types may be selected as desired.

Each evaporator 2 and each condenser 1 are connected through two pipelines, one of the two pipelines is a compression pipeline 6, and each compressor 3 is respectively arranged on each compression pipeline 6; the other is a throttle pipeline 7, and each electronic expansion valve 4 is respectively arranged on each throttle pipeline 7,

Preferably, as indicated by arrows in the figure, a water inlet and a water outlet are provided in the condenser 1 for circulating cooling water therethrough, and a water inlet and a water outlet are provided in each of the evaporators 2 for circulating cooling water therethrough.

The number of the ends of the regulating pipeline 5 is consistent with that of the evaporators 2, and the ends are respectively connected with the evaporators 2, and a heat regulating valve 8 is arranged on the regulating pipeline 5, so that the opening and closing between the ends of the regulating pipeline 5 and the evaporators 2 can be regulated through the heat regulating valve 8.

When the unit is in normal operation, the heat regulating valve 8 is closed, the condenser 1 and each evaporator 2 respectively form a plurality of sets of refrigeration systems which are independently operated, and the refrigeration systems are communicated only at the condenser 1.

Taking the operation of one refrigeration system as an example, the following steps are sequentially carried out:

1) The refrigerant is introduced into the condenser 1, which releases heat to produce a high pressure refrigerant liquid;

2) The high-pressure refrigerant liquid enters a throttling pipeline 7, throttles and forms low-pressure gas-liquid two-phase refrigerant when passing through the electronic expansion valve 4;

3) The low-pressure gas-liquid two-phase refrigerant enters the evaporator 22 and evaporates to absorb heat, so as to form low-pressure refrigerant vapor;

4) The low pressure refrigerant vapor enters the compression line 6 and is compressed into high pressure refrigerant vapor as it passes through the compressor 38;

5) The high-pressure refrigerant vapor is re-introduced into the condenser 1 and is thus circulated.

When the heat regulating valve 8 is opened and regulated, the refrigeration systems communicated by the heat regulating valve 8 are mutually influenced, specifically, the evaporation temperature of each evaporator is different due to the influence of the temperature of the freezing water in the evaporator, and the evaporation temperature of one evaporator 1 (which can be called a first evaporator) is higher than that of the other evaporators 2, at the moment, the electronic expansion valve 4 of the refrigeration system where the first evaporator is located is opened, the electronic expansion valves 4 of the refrigeration systems where the other evaporators 2 are located are closed, so that the flow of the refrigerant in the first evaporator is larger, the refrigerating capacity is also increased, the flow of the refrigerant in the other evaporators 2 is smaller, the refrigerating capacity is also reduced, and part of the refrigerant in the first evaporator is bypassed to the other evaporators 2, thereby realizing the partial load regulation of the refrigerating capacity of each evaporator 2 and avoiding the frequent opening and closing and shutting down and hot gas bypass regulation modes.

What has been described above is merely some embodiments of the present utility model. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims

1. The utility model provides a cold volume adjustable multi-evaporation temperature cooling water set which characterized in that: comprising

A condenser (1) for producing high pressure refrigerant vapor into high pressure refrigerant liquid;

At least two evaporators (2), each evaporator (2) is connected with the condenser (1) through two pipelines, and is used for preparing low-pressure refrigerant vapor from low-pressure gas-liquid two-phase refrigerant;

At least two compressors (3), each of the compressors (3) is respectively installed on one of the evaporators (2) and connected with the condenser (1) for compressing low-pressure refrigerant vapor into high-pressure refrigerant vapor;

At least two electronic expansion valves (4), wherein each electronic expansion valve (4) is respectively arranged on the other pipeline of each evaporator (2) connected with the condenser (1) and is used for preparing high-pressure refrigerant liquid into low-pressure gas-liquid two-phase refrigerant;

And each end of the adjusting pipeline (5) is respectively connected with the evaporator (2).

2. The multi-evaporation temperature water chiller with adjustable cooling capacity according to claim 1 and characterized in that: each evaporator (2) is connected with the condenser (1) through a compression pipeline (6), and each compressor (3) is respectively arranged on each compression pipeline (6).

3. The multi-evaporation temperature water chiller with adjustable cooling capacity according to claim 1 and characterized in that: each evaporator (2) is connected with the condenser (1) through a throttling pipeline (7), and each electronic expansion valve (4) is respectively arranged on each throttling pipeline (7).

4. The multi-evaporation temperature water chiller with adjustable cooling capacity according to claim 1 and characterized in that: the condenser (1) is provided with a water inlet and a water outlet.

5. The multi-evaporation temperature water chiller with adjustable cooling capacity according to claim 1 and characterized in that: each evaporator (2) is provided with a water inlet and a water outlet.

6. The multi-evaporation temperature water chiller with adjustable cooling capacity according to claim 1 and characterized in that: and a heat regulating valve (8) is arranged on the regulating pipeline (5).

7. The multi-evaporation temperature water chiller with adjustable cooling capacity according to claim 6 and characterized in that: when the heat regulating valve (8) is opened, the evaporation temperature of each evaporator (2) is different.

8. The multi-evaporation temperature water chiller with adjustable cooling capacity according to claim 1 and characterized in that: the refrigerant is R-22, R-407c or R-410a.