CN216114753U - Refrigerating system of refrigerating device for ship - Google Patents
Refrigerating system of refrigerating device for ship Download PDFInfo
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- CN216114753U CN216114753U CN202121803941.0U CN202121803941U CN216114753U CN 216114753 U CN216114753 U CN 216114753U CN 202121803941 U CN202121803941 U CN 202121803941U CN 216114753 U CN216114753 U CN 216114753U
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Abstract
The utility model discloses a refrigerating system of a marine refrigerating device, which comprises a refrigerant liquid supply pipe, a refrigerant air return pipe and a plurality of groups of refrigerating subsystems connected in parallel between the refrigerant liquid supply pipe and the air return pipe, wherein each group of refrigerating subsystems respectively comprises a refrigerating main circulation structure, a hot gas bypass auxiliary circulation structure and a liquid spray cooling auxiliary circulation structure, and the refrigerating main circulation structure comprises a refrigerating circulation loop consisting of a gas-liquid separator, a compressor, an oil separator and a condenser; the hot gas bypass auxiliary circulation structure comprises a hot gas bypass electromagnetic valve and a KVC hot gas bypass valve; the spray cooling auxiliary circulation structure comprises a spray electromagnetic valve and a spray expansion valve. The utility model achieves the purposes of simple, convenient, reliable and efficient control, effectively avoids the condition that the oil return of the compressor is poor after the refrigeration load is reduced, and is beneficial to the long-term preservation of the refrigeration house food and the improvement of the food taste.
Description
Technical Field
The utility model relates to the field of refrigeration systems for ships, in particular to a refrigeration system of a refrigeration device for a ship.
Background
With the vigorous development of the shipbuilding industry in China, the shipbuilding industry in China is gradually developed from large amount to high quality, so that various fields associated with the shipbuilding industry are required to be continuously optimized, higher requirements are provided as food preservation devices essential to ships, the conventional refrigerator for preserving vegetables cannot meet the existing requirements, the conventional refrigerator has a relatively long preservation period for meat foods, and the preservation period for vegetables cannot meet the requirements of ships with long voyage. The problem is well solved by the appearance of the controlled atmosphere storage, and the preservation period of the controlled atmosphere storage is improved from about one week to about 35 days in the traditional controlled atmosphere storage. The refrigerating device is used as cold source providing equipment of the controlled atmosphere fresh-keeping warehouse, relatively high requirements are provided, the temperature control precision is required to be high, and stable work under different loads can be met. The temperature control precision and the refrigeration load capacity of the refrigeration system for the ship in the prior art cannot meet the requirements of the controlled atmosphere fresh-keeping warehouse.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a refrigerating system of a refrigerating device for a ship, which solves the problem that the refrigerating system for the ship in the prior art cannot meet the requirements of a controlled atmosphere fresh-keeping warehouse.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a refrigerating system of marine cold storage plant, includes refrigerant feed pipe, refrigerant muffler to and at least two sets of refrigeration subsystems that the structure is the same, each group refrigeration subsystem parallelly connected intercommunication between refrigerant feed pipe, refrigerant muffler, and every group refrigeration subsystem includes refrigeration main loop structure, steam bypass auxiliary loop structure, hydrojet cooling auxiliary loop structure respectively, in every group refrigeration subsystem: the refrigeration main circulation structure comprises a gas-liquid separator, a compressor, an oil separator and a condenser, wherein the inlet end of the gas-liquid separator is communicated with the refrigerant gas return pipe through a pipeline bypass, the outlet end of the gas-liquid separator is connected with the inlet end of the compressor through a pipeline, the outlet end of the compressor is connected with the inlet end of the oil separator through a pipeline, the outlet end of the oil separator is connected with the refrigerant inlet end of the condenser through a pipeline, and the refrigerant outlet end of the condenser is communicated with the refrigerant liquid supply pipe through a pipeline bypass, so that a refrigeration circulation loop is formed;
the hot gas bypass auxiliary circulation structure comprises a hot gas bypass electromagnetic valve and a KVC hot gas bypass valve, wherein the inlet end of the hot gas bypass electromagnetic valve is communicated with a pipeline between the outlet end of an oil separator and the refrigerant inlet end of a condenser through a pipeline bypass, the outlet end of the hot gas bypass electromagnetic valve is connected with the inlet end of the KVC hot gas bypass valve through a pipeline, and the outlet end of the KVC hot gas bypass valve is communicated with the inlet end pipeline of a gas-liquid separator through a pipeline bypass, so that a hot gas circulation loop is formed;
the spray cooling auxiliary circulation structure comprises a spray electromagnetic valve and a spray expansion valve, wherein the inlet end of the spray electromagnetic valve is communicated with a refrigerant outlet end pipeline of the condenser through a pipeline bypass, the outlet end of the spray electromagnetic valve is connected with the inlet end of the spray expansion valve through a pipeline, and the outlet end of the spray expansion valve is communicated with an inlet end pipeline of the gas-liquid separator through a pipeline bypass, so that a spray circulation loop is formed.
Furthermore, the refrigeration main circulation structure also comprises a drying filter, the drying filter is communicated with a refrigerant outlet end pipeline connected to the condenser, and the inlet end of the liquid spraying electromagnetic valve is communicated with an inlet end pipeline of the gas-liquid separator behind the drying filter through a pipeline bypass.
Furthermore, the refrigeration main circulation structure further comprises a liquid observation mirror, the liquid observation mirror is communicated with a refrigerant outlet end pipeline connected to the condenser, and the inlet end of the liquid spraying electromagnetic valve is communicated with an inlet end pipeline of the gas-liquid separator behind the liquid observation mirror through a pipeline bypass.
Furthermore, in the refrigeration main circulation structure, pipelines between the outlet end of the gas-liquid separator and the inlet end of the compressor, and pipelines between the outlet end of the oil separator and the inlet end of the refrigerant of the condenser are respectively communicated by a bypass to be provided with a pressure gauge, and the pressure gauge is electrically connected with a pressure controller.
Furthermore, a manual stop valve is connected to a refrigerant return pipe before the parallel connection and communication position of each group of refrigeration subsystems in a communication mode.
The utility model can realize the accurate control of the temperature of the cold storage with larger load change of the cold storage due to the addition of the hot gas bypass and the spray liquid cooling auxiliary circulation structure, and is more convenient and easier compared with the modes of starting and stopping a compressor, frequency conversion, cylinder unloading and the like.
When the load of the refrigeration house is greatly changed, the main machine can automatically adapt to the load of the refrigeration house in a mode of intervention of a hot gas bypass auxiliary circulation structure. When the return air temperature of the compressor is higher, the liquid spraying cooling auxiliary circulation structures can automatically intervene to enable the return air temperature of the compressor to return to the normal return air temperature range and stably run for a long time, the core components of the two sets of auxiliary circulation structures are KVC hot air bypass valves and liquid spraying expansion valves which are pure mechanical components, and no electric participation exists, so that the reliability of the whole machine is greatly improved.
The utility model has the beneficial effects that:
1. the refrigeration cycle system of the environment-controlled device organically integrates hot gas bypass and liquid spraying cooling in the main refrigeration cycle system, effectively solves the problems that the compressor is frequently started and stopped and damaged when the load of a refrigeration house changes, and achieves the purposes of simple, convenient, reliable and efficient control.
2. The utility model realizes the energy adjustment of the main engine without changing the capacity of the compressor, thereby effectively avoiding the condition that the oil return of the compressor is poor after the refrigeration load is reduced.
3. The refrigeration system disclosed by the utility model can greatly reduce the frequent start and stop of the compressor, is more favorable for controlling the precision of the refrigerator temperature, and is favorable for keeping the refrigerator food fresh for a long time and improving the taste of the food.
4. The refrigeration system disclosed by the utility model has the advantages that the refrigeration device of the ship cold storage is generally small, the matching degree is better, and the refrigeration system can show obvious advantages in the aspect of small cold storage compared with other energy regulation modes.
Drawings
Fig. 1 is a schematic diagram of the structure of the present embodiment.
Detailed Description
The utility model is further illustrated with reference to the following figures and examples.
As shown in fig. 1, the refrigeration system of the marine refrigeration apparatus of this embodiment includes a refrigerant liquid supply pipe 1, a refrigerant gas return pipe 2, and also includes two sets of refrigeration subsystems with the same structure, where one set of refrigeration subsystem is used as a main refrigeration subsystem, and the other set of refrigeration subsystem is used as a backup refrigeration subsystem. The two groups of refrigeration subsystems are connected in parallel and communicated between the refrigerant liquid supply pipe 1 and the refrigerant gas return pipe 2, and each group of refrigeration subsystems respectively comprises a refrigeration main circulation structure, a hot gas bypass auxiliary circulation structure and a liquid spraying cooling auxiliary circulation structure. In the present embodiment, the active refrigeration subsystem is taken as an example to explain the present embodiment, and the structure and principle of the standby refrigeration subsystem are the same as those of the active refrigeration subsystem.
The main refrigeration cycle structure in the refrigeration subsystem comprises a compressor 3, an oil separator 4, a shell-and-tube condenser 5, a dry filter 6, a liquid viewing mirror 7 and a gas-liquid separator 8. The inlet end of the gas-liquid separator 8 is communicated with the bypass of the refrigerant return pipe 2 through a pipeline, the outlet end of the gas-liquid separator 8 is connected with the inlet end of the compressor 3 through a pipeline, the outlet end of the compressor 3 is connected with the inlet end of the oil separator 4 through a pipeline, the outlet end of the oil separator 4 is connected with the refrigerant inlet end of the shell-and-tube condenser 5 through a pipeline, the refrigerant outlet end of the shell-and-tube condenser 5 is connected with the inlet end of the dry filter 6 through a pipeline, the outlet end of the dry filter 6 is connected with the inlet end of the liquid viewing mirror 7 through a pipeline, and the outlet end of the liquid viewing mirror 7 is communicated with the bypass of the refrigerant liquid supply pipe 1 through a pipeline. The refrigerant output by the compressor 3 enters a refrigerant channel of the shell-and-tube condenser 5 through the oil separator 4, then enters the refrigerant liquid supply pipe 1 through the drying filter 6 and the liquid viewing mirror 7, is output to a refrigeration channel of the modified atmosphere preservation warehouse through the refrigerant liquid supply pipe 1, and the refrigerant returned by the refrigeration channel of the modified atmosphere preservation warehouse enters the gas-liquid separator 8, so that the refrigeration cycle is completed.
The hot gas bypass auxiliary circulation structure in the refrigeration subsystem comprises a hot gas bypass electromagnetic valve 9 and a KVC hot gas bypass valve 10, wherein the inlet end of the hot gas bypass electromagnetic valve 9 is communicated with a pipeline between the outlet end of the oil separator 4 and the refrigerant inlet end of the shell-and-tube condenser 5 through a pipeline bypass, the outlet end of the hot gas bypass electromagnetic valve 9 is connected with the inlet end of the KVC hot gas bypass valve 10 through a pipeline, and the outlet end of the KVC hot gas bypass valve 10 is communicated with the pipeline at the inlet end of the gas-liquid separator 8 through a pipeline bypass. After the cold load of the refrigeration house is reduced, the hot gas bypass electromagnetic valve 9 is controlled to be opened by the electric control system, and the hot gas bypass auxiliary cycle is put into use to ensure the quick matching of the refrigeration device and the refrigeration house load, so that the aims of quick and accurate temperature control are fulfilled.
The spray cooling auxiliary circulation structure in the refrigeration subsystem comprises a spray electromagnetic valve 11 and a spray expansion valve 12, wherein the inlet end of the spray electromagnetic valve 11 is communicated with a pipeline at the outlet end of the liquid observation mirror 7 through a pipeline bypass, the outlet end of the spray electromagnetic valve 11 is connected with the inlet end of the spray expansion valve 12 through a pipeline, and the outlet end of the spray expansion valve 12 is communicated with a pipeline at the inlet end of the gas-liquid separator 8 through a pipeline bypass. When the exhaust temperature of the compressor reaches a set temperature (the temperature required to be put into use for spray cooling), the spray cooling electromagnetic valve 11 is opened under the control of the electric control system, and spray cooling auxiliary circulation is put into use to ensure that the exhaust temperature of the compressor of the refrigeration device is not over-temperature and the refrigeration device is stable and reliable to operate for a long time.
In the refrigeration main circulation structure, a low-pressure gauge 13.1 is communicated and installed in a pipeline bypass way between the outlet end of a gas-liquid separator 8 and the inlet end of a compressor 3, a high-pressure gauge 13.2 is communicated and installed in a pipeline bypass way between the outlet end of an oil separator 4 and the refrigerant inlet end of a shell-and-tube condenser 5, the low-pressure gauge 13.1 is electrically connected with a low-pressure controller 14.1, and the high-pressure gauge 13.2 is electrically connected with a high-pressure controller 14.2, so that the refrigeration main circulation structure can realize the refrigeration of the air conditioner
In the utility model, the refrigerant return pipe 2 before the parallel connection communication position of the two groups of refrigeration subsystems, namely the bypass communication position of the inlet end pipeline of the gas-liquid separator 8, is also communicated and connected with a manual stop valve 15, and the manual stop valve 15 can be manually closed, thereby facilitating the later system maintenance.
The utility model adopts a conventional method for a marine refrigeration device host, two groups of refrigeration subsystems are mutually independent, only one group of refrigeration subsystem works under normal conditions, and when the working refrigeration subsystem breaks down, the second group of refrigeration subsystem is put into operation, so that the reliability of the refrigeration device host can be effectively improved, and the reliable guarantee is provided for the food supply of crews.
All refrigeration of each group of refrigeration subsystems is carried out through the refrigeration main cycle under the full-load working condition, after some refrigeration houses are stopped, the required refrigeration load of the refrigeration houses is correspondingly reduced, at the moment, the hot gas bypass auxiliary cycle is timely put into work, and a part of exhaust gas of the compressor is automatically bypassed to the front end of the gas-liquid separator according to the return gas pressure so as to reduce the actual work of the compressor. The return air temperature of the compressor is correspondingly increased after the hot gas bypass auxiliary cycle works for a period of time, and when the return air temperature is increased to a set value, the spray liquid cooling auxiliary cycle is put into work. The main machine of the refrigerating device can well adapt to the change of the load of the refrigeration house by the mutual matching work of the hot gas bypass auxiliary circulation and the spray liquid cooling auxiliary circulation, and the frequent start and stop of the compressor are avoided, so that the precision of temperature control in the refrigeration house can be better ensured.
The embodiments of the present invention are described only for the preferred embodiments of the present invention, and not for the limitation of the concept and scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall into the protection scope of the present invention, and the technical content of the present invention which is claimed is fully set forth in the claims.
Claims (5)
1. A refrigeration system for a marine refrigeration unit, characterized by: including refrigerant feed pipe, refrigerant muffler to and at least two sets of refrigeration subsystems that the structure is the same, each refrigeration subsystem of group connects in parallel and communicates between refrigerant feed pipe, refrigerant muffler, and every refrigeration subsystem of group includes refrigeration main loop structure, steam bypass auxiliary loop structure, hydrojet cooling auxiliary loop structure respectively, in every refrigeration subsystem of group: the refrigeration main circulation structure comprises a gas-liquid separator, a compressor, an oil separator and a condenser, wherein the inlet end of the gas-liquid separator is communicated with the refrigerant gas return pipe through a pipeline bypass, the outlet end of the gas-liquid separator is connected with the inlet end of the compressor through a pipeline, the outlet end of the compressor is connected with the inlet end of the oil separator through a pipeline, the outlet end of the oil separator is connected with the refrigerant inlet end of the condenser through a pipeline, and the refrigerant outlet end of the condenser is communicated with the refrigerant liquid supply pipe through a pipeline bypass, so that a refrigeration circulation loop is formed;
the hot gas bypass auxiliary circulation structure comprises a hot gas bypass electromagnetic valve and a KVC hot gas bypass valve, wherein the inlet end of the hot gas bypass electromagnetic valve is communicated with a pipeline between the outlet end of an oil separator and the refrigerant inlet end of a condenser through a pipeline bypass, the outlet end of the hot gas bypass electromagnetic valve is connected with the inlet end of the KVC hot gas bypass valve through a pipeline, and the outlet end of the KVC hot gas bypass valve is communicated with the inlet end pipeline of a gas-liquid separator through a pipeline bypass, so that a hot gas circulation loop is formed;
the spray cooling auxiliary circulation structure comprises a spray electromagnetic valve and a spray expansion valve, wherein the inlet end of the spray electromagnetic valve is communicated with a refrigerant outlet end pipeline of the condenser through a pipeline bypass, the outlet end of the spray electromagnetic valve is connected with the inlet end of the spray expansion valve through a pipeline, and the outlet end of the spray expansion valve is communicated with an inlet end pipeline of the gas-liquid separator through a pipeline bypass, so that a spray circulation loop is formed.
2. A refrigeration system for a refrigeration unit for a ship in accordance with claim 1, wherein: the refrigeration main circulation structure further comprises a dry filter, the dry filter is communicated with a refrigerant outlet end pipeline connected to the condenser, and the inlet end of the liquid spraying electromagnetic valve is communicated with an inlet end pipeline of the gas-liquid separator behind the dry filter through a pipeline bypass.
3. A refrigeration system for a refrigeration unit for a ship in accordance with claim 1, wherein: the refrigeration main circulation structure further comprises a liquid observation mirror, the liquid observation mirror is communicated with a refrigerant outlet end pipeline connected to the condenser, and the inlet end of the liquid spraying electromagnetic valve is communicated with an inlet end pipeline of the gas-liquid separator behind the liquid observation mirror through a pipeline bypass.
4. A refrigeration system for a refrigeration unit for a ship in accordance with claim 1, wherein: in the refrigeration main circulation structure, pipelines between the outlet end of the gas-liquid separator and the inlet end of the compressor, and pipelines between the outlet end of the oil separator and the inlet end of the refrigerant of the condenser are respectively communicated by a bypass to be provided with a pressure gauge, and the pressure gauge is electrically connected with a pressure controller.
5. A refrigeration system for a refrigeration unit for a ship in accordance with claim 1, wherein: and the refrigerant return pipes in front of the parallel connection and communication positions of the refrigerating subsystems of each group are also communicated and connected with a manual stop valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121803941.0U CN216114753U (en) | 2021-08-04 | 2021-08-04 | Refrigerating system of refrigerating device for ship |
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| CN202121803941.0U CN216114753U (en) | 2021-08-04 | 2021-08-04 | Refrigerating system of refrigerating device for ship |
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| CN216114753U true CN216114753U (en) | 2022-03-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513851A (en) * | 2021-08-04 | 2021-10-19 | 合肥天鹅制冷科技有限公司 | Refrigerating system of refrigerating device for ship |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513851A (en) * | 2021-08-04 | 2021-10-19 | 合肥天鹅制冷科技有限公司 | Refrigerating system of refrigerating device for ship |
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