CN109110098B - Closed mast internal air conditioning system for ship - Google Patents
Closed mast internal air conditioning system for ship Download PDFInfo
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- CN109110098B CN109110098B CN201810852886.0A CN201810852886A CN109110098B CN 109110098 B CN109110098 B CN 109110098B CN 201810852886 A CN201810852886 A CN 201810852886A CN 109110098 B CN109110098 B CN 109110098B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/12—Heating; Cooling
Abstract
The invention provides a ship closed mast internal air conditioning system, which comprises a comprehensive cooling host, a local cooling unit, a liquid dividing valve group, a collector, an electronic expansion valve and the like, so that the cooling requirement of a cabin is realized, the local cooling unit arranged on the upper part of an electronic cabinet is used for cooling the upper part area of the electronic cabinet, the combined cooling of seawater direct cooling refrigerant refrigeration or mechanical refrigeration can be realized, one refrigerating device can simultaneously control the working environment in a closed mast and the working environment on the upper part of electronic equipment, a comprehensive cooling mode of seawater and conventional mechanical refrigeration for the upper parts of the closed mast and the electronic cabinet is realized, the whole application system is energy-saving, environment-friendly, safe and reliable, and has higher application value for the design of the ship closed mast internal air conditioning system.
Description
Technical Field
The invention relates to an air conditioning system for ships, in particular to a closed mast internal air conditioning system which is provided with a large number of electronic cabinets and needs local cooling.
Background
Due to the operation and use requirements of modern ships, a large amount of electronic equipment such as an electronic cabinet and a communication navigation cabinet is centrally arranged in the novel closed mast, so that the heat productivity is very large, and if the heat is not dissipated in time, the overheating of circuits and equipment can be caused, and the efficiency is reduced. At present, the closed mast temperature control for ships in China is to carry out circulating ventilation cooling by a machine room special-purpose cabinet air conditioner, because the space in the closed mast is limited, the ventilation mode of the air conditioner can only improve the average temperature in the closed mast, the temperature of the upper part area of a part of electronic equipment cabinet can not be effectively reduced, if an air receiving pipe carries out independent cooling on the upper part of the equipment cabinet, condensation can occur in the electronic equipment cabinet, the safety and the reliability of equipment are seriously influenced, in addition, the space requirement is not allowed, and the traditional ship air conditioning system can not meet the design requirements of the compactness and the light weight of the closed mast.
Disclosure of Invention
The invention aims to provide a ship closed mast internal air conditioning system.
In order to solve the above problems, the present invention provides a ship closed mast internal air conditioning system, comprising:
the method comprises the following steps: synthesize cooling host computer 1 and three local cooling unit 3, 4, 5 parallelly connected, divide valve unit 2, accumulator 6, electronic expansion valve 7, wherein, synthesize cooling host computer 1 and include: 2 compressors 9, 10, 2 working medium pumps 14 and 15, an electronic expansion valve 11, an evaporation coil 12, a fan 13, 12 electric valves 16, 17, 18, 19, 20, 21, 22, 23, 29, 30, 31 and 32, a shell-and-tube heat exchanger 24 and a seawater temperature sensor 25; each local cooling unit 3, 4, 5 comprises: an electronic expansion valve 26, an evaporator coil 27, a fan 28, wherein,
the seawater temperature sensor 25 is arranged on a seawater pipeline and is connected with a seawater inlet 101 of the shell-and-tube heat exchanger 24 through a pipeline, and a seawater outlet 102 of the shell-and-tube heat exchanger 24 is discharged through a pipeline;
the outlet of the refrigerant pipeline of the shell-and-tube heat exchanger 24 is divided into a first branch and a second branch to form 2 independent refrigerant circulating branches;
wherein, in the first branch: the working medium pump 14 is respectively connected with the inlets of the parallel electric valves 22 and 30 which are connected in parallel, and the outlet of the electric valve 22 is connected with the inlet of the working medium pump 14 through a pipeline; the outlet of the working medium pump 14 is connected with the inlet of the electric valve 21 through a pipeline; the common end of the outlet pipelines of the electric valves 21 and 30 connected in parallel is connected with the inlet of the electronic expansion valve 11 through a pipeline, the outlet of the electronic expansion valve 11 is connected with the inlet of the evaporation coil 12, the outlet of the evaporation coil 12 is respectively connected with the inlets of the electric valves 23 and 31 connected in parallel through pipelines, the fan 13 is arranged at the air outlet of the comprehensive cooling main machine 1 to blow out the air cooled by the evaporation coil 12, the outlet of the electric valve 23 is connected with the inlet of the compressor 9 through a pipeline, the outlet of the compressor 9 is connected with the inlet of the electric valve 16 through a pipeline, and the common end of the outlet pipelines of the electric valves 16 and 31 connected in parallel is connected with the refrigerant inlet of the shell;
in the second branch: the working medium pump 15 is connected with the inlets of the parallel electric valves 18 and 29, the outlet of the electric valve 18 is connected with the inlet of the working medium pump 15 through a pipeline, the outlet of the working medium pump 15 is connected with the inlet of the electric valve 17 through a pipeline, the common end of the outlet pipelines of the parallel electric valves 17 and 29 is connected with the inlet of the liquid dividing valve group 2 through a pipeline, the liquid dividing valve group 2 is divided into four outlets, wherein the first, second and third outlets are connected with the pipelines of the refrigerant inlets of the parallel 3 local cooling units 3, 4 and 5 through pipelines, the fourth outlet is connected with the inlet of the electronic expansion valve 7 through a pipeline, the electronic expansion valve 7, and the outlet of the electronic expansion valve 7 is connected with 1 inlet of the return collector 6 through a pipeline;
each local cooling unit 3, 4, 5 comprises an electronic expansion valve 26, an evaporation coil 27 and a fan 28, wherein the inlet pipeline of each local cooling unit is connected with the inlet of one electronic expansion valve 26, the outlet of one electronic expansion valve 26 is connected with the inlet of one evaporation coil 27 through a pipeline, the outlet pipeline of one evaporation coil 27 is connected with one of the 3 inlets of the collector 6, each fan 28 is installed at the air outlet of the local cooling unit 3, 4, 5 to which it belongs, and each fan 28 is used for blowing out the air (above the electronic cabinet) cooled by the evaporation coil 27 connected with it;
the outlet of the return device 6 is connected with the inlets of the electric valves 19 and 32 which are connected in parallel through pipelines, the outlet of the electric valve 19 is connected with the inlet of the compressor 10 through a pipeline, the outlet of the compressor 10 is connected with the inlet of the electric valve 20 through a pipeline, and the common end of the outlet pipelines of the electric valves 20 and 32 which are connected in parallel is connected with the other refrigerant inlet of the shell-and-tube heat exchanger 24 through a pipeline.
Further, in the ship closed mast internal air conditioning system, the comprehensive multi-connected cooling main unit 1 is arranged inside the closed mast and used for controlling the overall temperature of the cabin and maintaining the environment required by personnel working in the cabin, and the local cooling units 3, 4 and 5 are arranged at the upper part of the electronic cabinet 104 in the closed mast 100 and used for eliminating local high temperature at the upper part of the cabinet.
Further, in the closed mast internal air conditioning system for the ship, the low-temperature refrigerant of the shell-and-tube heat exchanger 24 is delivered to the evaporating coil 12 in the integrated cooling main machine 1 and the evaporating coil 27 of the 3 local cooling units respectively through the compressors 9 and 10 or the working medium pumps 14 and 15 in two paths, the low-temperature refrigerant is evaporated in the evaporating coils 12 and 27 to cool the surrounding air, and the cooled air is delivered to the cabin and the upper part of the cabinet through the fans 13 and 28; the external cooling seawater exchanges heat through the shell-and-tube heat exchanger 24, and takes away heat absorbed by the refrigerant in the integrated cooling main machine 1 and the local cooling units 3, 4 and 5.
Further, in the ship closed mast air conditioning system, when the seawater temperature sensor 25 detects that the seawater is at a high temperature, the electric valves 17, 18, 21, 22, 31, 32 and the working medium pumps 14, 15 are closed, the compressors 9, 10 and the electric valves 29, 30, 23, 16, 19, 20 are opened, and the refrigerant discharges the heat absorbed in the closed mast to the seawater through the shell-and-tube heat exchanger 24.
Further, in the closed mast air conditioning system for ships, when the seawater temperature sensor 25 detects that the seawater temperature is low, the compressors 9 and 10 and the electric valves 29, 30, 23, 16, 19 and 20 are closed, the electric valves 17, 18, 21, 22, 31 and 32 and the working medium pumps 14 and 15 are opened, and the refrigerant absorbs heat and directly transfers the heat to the seawater through the shell-and-tube heat exchanger 24.
Further, in the ship closed mast internal air conditioning system, the opening degree of the electronic expansion valve 7 is adjusted to adjust the refrigerant flow rate of the refrigerant loop of the local cooling units 3, 4, 5.
Further, in the closed mast internal air conditioning system for ships, the system pipeline of the comprehensive cooling main machine 1 for closed mast 100 cabin refrigeration and the system pipelines of the local cooling units 3, 4 and 5 are independent from each other, and the two system pipelines are mutually standby.
Compared with the prior art, the invention not only realizes the cooling demand of the cabin by the combination of the cooling main machine, the local cooling unit, the liquid separating valve group, the collector, the electronic expansion valve and the like, meanwhile, the local cooling unit is arranged at the upper part of the electronic cabinet to cool the upper area of the electronic cabinet, so that the combined cooling of the refrigeration of a refrigerant directly cooled by seawater or the mechanical refrigeration can be realized, one refrigeration device can simultaneously control the working environment in the closed mast and the working environment at the upper part of the electronic equipment, and a comprehensive cooling mode of the seawater and the conventional mechanical refrigeration for the upper parts of the closed mast and the electronic cabinet is realized.
Drawings
Fig. 1 is a schematic diagram of a closed mast internal air conditioning system for a ship in accordance with an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the present invention provides a ship closed mast internal air conditioning system, comprising: synthesize cooling host computer 1 and three local cooling unit 3, 4, 5 parallelly connected, divide valve unit 2, accumulator 6, electronic expansion valve 7, wherein, synthesize cooling host computer 1 and include: 2 compressors 9, 10, 2 working medium pumps 14 and 15, an electronic expansion valve 11, an evaporation coil 12, a fan 13, 12 electric valves 16, 17, 18, 19, 20, 21, 22, 23, 29, 30, 31 and 32, a shell-and-tube heat exchanger 24 and a seawater temperature sensor 25; each local cooling unit 3, 4, 5 comprises: an electronic expansion valve 26, an evaporator coil 27, a fan 28, wherein,
the seawater temperature sensor 25 is arranged on a seawater pipeline and is connected with a seawater inlet 101 of the shell-and-tube heat exchanger 24 through a pipeline, and a seawater outlet 102 of the shell-and-tube heat exchanger 24 is discharged through a pipeline;
the outlet of the refrigerant pipeline of the shell-and-tube heat exchanger 24 is divided into a first branch and a second branch to form 2 independent refrigerant circulating branches;
wherein, in the first branch: the working medium pump 14 is respectively connected with the inlets of the parallel electric valves 22 and 30 which are connected in parallel, and the outlet of the electric valve 22 is connected with the inlet of the working medium pump 14 through a pipeline; the outlet of the working medium pump 14 is connected with the inlet of the electric valve 21 through a pipeline; the common end of the outlet pipelines of the electric valves 21 and 30 connected in parallel is connected with the inlet of the electronic expansion valve 11 through a pipeline, the outlet of the electronic expansion valve 11 is connected with the inlet of the evaporation coil 12, the outlet of the evaporation coil 12 is respectively connected with the inlets of the electric valves 23 and 31 connected in parallel through pipelines, the fan 13 is arranged at the air outlet of the comprehensive cooling main machine 1 to blow out the air cooled by the evaporation coil 12, the outlet of the electric valve 23 is connected with the inlet of the compressor 9 through a pipeline, the outlet of the compressor 9 is connected with the inlet of the electric valve 16 through a pipeline, and the common end of the outlet pipelines of the electric valves 16 and 31 connected in parallel is connected with the refrigerant inlet of the shell;
in the second branch: the working medium pump 15 is connected with the inlets of the parallel electric valves 18 and 29, the outlet of the electric valve 18 is connected with the inlet of the working medium pump 15 through a pipeline, the outlet of the working medium pump 15 is connected with the inlet of the electric valve 17 through a pipeline, the common end of the outlet pipelines of the parallel electric valves 17 and 29 is connected with the inlet of the liquid dividing valve group 2 through a pipeline, the liquid dividing valve group 2 is divided into four outlets, wherein the first, second and third outlets are connected with the pipelines of the refrigerant inlets of the parallel 3 local cooling units 3, 4 and 5 through pipelines, the fourth outlet is connected with the inlet of the electronic expansion valve 7 through a pipeline, the electronic expansion valve 7, and the outlet of the electronic expansion valve 7 is connected with 1 inlet of the return collector 6 through a pipeline;
each local cooling unit 3, 4, 5 comprises an electronic expansion valve 26, an evaporation coil 27 and a fan 28, wherein the inlet pipeline of each local cooling unit is connected with the inlet of one electronic expansion valve 26, the outlet of one electronic expansion valve 26 is connected with the inlet of one evaporation coil 27 through a pipeline, the outlet pipeline of one evaporation coil 27 is connected with one of the 3 inlets of the collector 6, each fan 28 is installed at the air outlet of the local cooling unit 3, 4, 5 to which it belongs, and each fan 28 is used for blowing out the air (above the electronic cabinet) cooled by the evaporation coil 27 connected with it;
the outlet of the return device 6 is connected with the inlets of the electric valves 19 and 32 which are connected in parallel through pipelines, the outlet of the electric valve 19 is connected with the inlet of the compressor 10 through a pipeline, the outlet of the compressor 10 is connected with the inlet of the electric valve 20 through a pipeline, and the common end of the outlet pipelines of the electric valves 20 and 32 which are connected in parallel is connected with the other refrigerant inlet of the shell-and-tube heat exchanger 24 through a pipeline.
The invention realizes the cooling demand of the cabin by the combination of the cooling main machine, the local cooling unit, the liquid separating valve group, the collector, the electronic expansion valve and the like, meanwhile, the local cooling unit is arranged at the upper part of the electronic cabinet to cool the upper area of the electronic cabinet, so that the combined cooling of the refrigeration of a refrigerant directly cooled by seawater or the mechanical refrigeration can be realized, one refrigeration device can simultaneously control the working environment in the closed mast and the working environment at the upper part of the electronic equipment, and a comprehensive cooling mode of the seawater and the conventional mechanical refrigeration for the upper parts of the closed mast and the electronic cabinet is realized.
The invention provides a design of an air conditioning system for a closed mast, which has the advantages of compact structure, small occupied space and strong space refrigerating capacity, can simultaneously carry out overall temperature control on a cabin, can carry out local cooling on high-heating parts, and can solve the problems that the traditional refrigeration air conditioning system in the prior art has unreliable cooling effect and large occupied space in the closed mast and cannot simultaneously carry out temperature control on the whole and the local parts of the cabin.
In the embodiment of the air conditioning system in the closed mast of the ship, the comprehensive multi-connected cooling host 1 is arranged in the closed mast 100 and used for controlling the overall temperature of a cabin and maintaining the environment required by personnel working in the cabin, and the local cooling units 3, 4 and 5 are arranged at the upper part of the electronic cabinet 104 in the closed mast 100 and used for eliminating the local high temperature at the upper part of the cabinet and achieving the purpose of local cooling.
In the embodiment of the air conditioning system in the closed mast of the ship, the low-temperature refrigerant of the shell-and-tube heat exchanger 24 is conveyed into the evaporating coil 12 in the comprehensive cooling main machine 1 and the evaporating coil 27 of 3 local cooling units respectively through the compressors 9 and 10 or the working medium pumps 14 and 15 in two paths, the low-temperature refrigerant is evaporated in the evaporating coils 12 and 27 to cool the surrounding air, and the cooled air is sent to the cabin and the upper part of the cabinet through the fans 13 and 28; the external cooling seawater exchanges heat through the shell-and-tube heat exchanger 24, and takes away heat absorbed by the refrigerant in the integrated cooling main machine 1 and the local cooling units 3, 4 and 5.
The air conditioning ventilation can control the average temperature in the cabin and the temperature of the local area at the upper part of the electronic cabinet, so that the temperature distribution in the cabin is more uniform, the condition that the average temperature of the cabin meets the requirement and the high temperature occurs in the single part is avoided.
In the embodiment of the air conditioning system in the closed mast of the ship, two working modes of mechanical refrigeration and seawater refrigeration can be realized:
when the seawater temperature sensor 25 detects that the seawater is at a high temperature, the electric valves 17, 18, 21, 22, 31 and 32 and the working medium pumps 14 and 15 are closed, the compressors 9 and 10 and the electric valves 29, 30, 23, 16, 19 and 20 are opened, and the refrigerant discharges heat absorbed in the closed mast to the seawater through the shell-and-tube heat exchanger 24, so that mechanical refrigeration is realized;
when the seawater temperature sensor 25 detects that the seawater temperature is low, the compressors 9 and 10 and the electric valves 29, 30, 23, 16, 19 and 20 are closed, the electric valves 17, 18, 21, 22, 31 and 32 and the working medium pumps 14 and 15 are opened, and the refrigerant absorbs heat and transfers the heat to the seawater directly through the shell-and-tube heat exchanger 24, so that the seawater refrigeration is realized. The whole system design fully utilizes low-temperature seawater as a cold source, and has certain energy-saving and environment-friendly properties and reliable operation.
The invention can realize two working modes of mechanical refrigeration and seawater refrigeration, when the temperature of seawater is low, the seawater is used for directly cooling the refrigerant, the refrigerant is evaporated to take away the heat of the closed mast, when the temperature of seawater is high, the mechanical refrigeration is adopted, and the two cooling modes are automatically switched according to the temperature of the seawater.
In the embodiment of the air conditioning system in the closed mast of the ship, the opening of the electronic expansion valve 7 is adjusted to adjust the refrigerant flow of the refrigerant loop of the local cooling units 3, 4 and 5, so that the refrigerating capacity of the local cooling units is adjusted.
The bypass flow is adjusted by adjusting the opening degree of the electronic expansion valve between the liquid separating valve group and the collector, so that the flow of the refrigerant flowing into the local cooling unit is controlled, and the control of the outlet air temperature of the local cooling unit is realized. Through this kind of mode can adjust local cooling unit air-out temperature, avoid the low equipment surface condensation that leads to of air-out temperature.
In the embodiment of the air conditioning system in the closed mast of the ship, two sets of refrigerant systems work independently, namely, a system pipeline of the comprehensive cooling main machine 1 for refrigerating the closed mast 100 cabin and system pipelines of the local cooling units 3, 4 and 5 are independent from each other, the two system pipelines are standby mutually, the damage of one system pipeline does not influence the normal operation of the other system pipeline, and the reliability of the whole system is improved.
Specifically, the external cooling water enters the multi-shell-and-tube heat exchanger 24 through the cooling water inlet pipe, takes away heat on the upper parts of the closed mast cabin and the cabinet absorbed by the comprehensive cooling main machine 1 and the local cooling units 3, 4 and 5, and then flows out through the cooling water outlet pipe. The refrigerant of the whole air-conditioning refrigeration system is divided into two large branches from a shell-and-tube heat exchanger 24, wherein the refrigerant of one refrigerant branch is sent to an electronic expansion valve 11 through an electric valve 30 (or an electric valve 22, a working medium pump 14 and an electric valve 21), then is evaporated in an evaporation coil 12, cools the air around the evaporation coil 12, is blown out through a fan 13 of a comprehensive cooling main machine 1, is used for controlling the overall temperature of the cabin, and then flows back to the electric valve 31 (or the electric valve 23, a compressor 9 and an electric valve 16) and is cooled through the shell-and-tube heat exchanger 24, and a cycle is; the other refrigerant branch refrigerant flows to the liquid-distributing valve group 2 through an electric valve 29 (or an electric valve 18, a working medium pump 15 and an electric valve 17), 4 branches are distributed through the liquid-distributing valve group 2, wherein 3 branches flow into electronic expansion valves 26 in local cooling units 3, 4 and 5 at the upper part of the electronic cabinet, and are evaporated in an evaporation coil 27, air around the evaporation coil 27 is cooled and blown into a control area at the upper part of the electronic cabinet through a fan 3, so that the temperature at the upper part of the electronic cabinet is controlled, 3 paths of refrigerant flow back into the collector 6, the other path of refrigerant pipeline of the liquid-distributing valve group 2 bypasses part of refrigerant to flow back into the collector 6 through an electronic expansion valve 7, and the refrigerant in the collector 6 flows into an electric valve 32 (or an electric valve 19, a compressor 10 and an electric valve 20) and then flows. The bypass flow of the liquid separating valve group 6 and the collector 2 is adjusted by adjusting the opening of the electronic expansion valve 7, so that the flow of the refrigerants flowing into the local cooling units 3, 4 and 5 is controlled, the control of the air outlet temperature of the local cooling units is realized, and the condensation caused by the over-low and high yield of the air outlet temperature is prevented.
When the seawater temperature sensor 24 monitors that the seawater temperature is higher than 5 ℃, the electric valves 17, 18, 21, 22, 31 and 32 and the working medium pumps 14 and 15 are closed, the compressors 9 and 10 and the electric valves 29, 30, 23, 16, 19 and 20 are started, and the refrigerant discharges heat absorbed in the closed mast to the seawater through the shell-and-tube heat exchanger 24 to realize mechanical refrigeration; when the seawater temperature sensor 25 detects that the seawater temperature is lower than 5 ℃, the compressors 9 and 10 and the electric valves 29, 30, 23, 16, 19 and 20 are closed, the electric valves 17, 18, 21, 22, 31 and 32 and the working medium pumps 14 and 15 are opened, and the refrigerant absorbs heat and transfers the heat to the seawater through the shell-and-tube heat exchanger 24, so that the seawater is refrigerated as a cold source.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (3)
1. An air conditioning system in a closed mast of a ship, comprising: synthesize cooling host computer (1) and three local cooling unit (3, 4, 5) that connect in parallel, divide valve unit (2), accumulator (6), second electronic expansion valve (7), wherein, synthesize cooling host computer (1) and include: the system comprises 2 compressors (9, 10), 2 working medium pumps (14, 15), a first electronic expansion valve (11), a first evaporation coil (12), a first fan (13), 12 electric valves (16, 17, 18, 19, 20, 21, 22, 23, 29, 30, 31, 32), a shell-and-tube heat exchanger (24) and a seawater temperature sensor (25), wherein the seawater temperature sensor (25) is arranged on a seawater pipeline and is connected with a seawater inlet (101) of the shell-and-tube heat exchanger (24) through a pipeline, and a seawater outlet (102) of the shell-and-tube heat exchanger (24) is discharged through the pipeline; the outlet of the refrigerant pipeline of the shell-and-tube heat exchanger (24) is divided into a first branch and a second branch to form 2 independent refrigerant circulating branches; wherein, in the first branch: the first working medium pump (14) is respectively connected with the inlets of the parallel electric valves (22, 30) which are connected in parallel, and the outlet of the first electric valve (22) is connected with the inlet of the first working medium pump (14) through a pipeline; the outlet of the first working medium pump (14) is connected with the inlet of the second electric valve (21) through a pipeline; the common end of the outlet pipelines of the electric valves (21, 30) which are connected in parallel is connected with the inlet of the first electronic expansion valve (11) through a pipeline, the outlet of the first electronic expansion valve (11) is connected with the inlet of the first evaporation coil (12), the outlet of the first evaporation coil (12) is respectively connected with the inlets of the parallel electric valves (23, 31) through pipelines, the first fan (13) is arranged at the air outlet of the comprehensive cooling main machine (1), the first fan (13) is used for blowing out air cooled by the first evaporation coil (12), the outlet of the seventh electric valve (23) is connected with the inlet of the first compressor (9) through a pipeline, the outlet of the first compressor (9) is connected with the inlet of a third electric valve (16) through a pipeline, the common end of the outlet pipelines of the parallel electric valves (16, 31) is connected with the refrigerant inlet of the shell-and-tube heat exchanger (24) through pipelines; in the second branch: the second working medium pump (15) is connected with the inlets of the parallel electric valves (18, 29), the outlet of the fourth electric valve (18) is connected with the inlet of the second working medium pump (15) through a pipeline, the outlet of the second working medium pump (15) is connected with the inlet of the fifth electric valve (17) through a pipeline, the common end of the outlet pipelines of the parallel electric valves (17, 29) is connected with the inlet of the liquid separating valve group (2) through a pipeline, the liquid separating valve group (2) is divided into four outlets, wherein the first, the second and the third outlets are connected with the pipelines of the refrigerant inlets of the parallel 3 local cooling units (3, 4, 5) through pipelines, the fourth outlet is connected with the inlet of the second electronic expansion valve (7) through a pipeline, and the outlet of the second electronic expansion valve (7) is connected with 1 inlet of the return collector (6) through a pipeline; each local cooling unit (3, 4, 5) comprises a third electronic expansion valve (26), a second evaporation coil (27) and a second fan (28), wherein the inlet pipeline of each local cooling unit is connected with the inlet of the third electronic expansion valve (26), the outlet of the third electronic expansion valve (26) is connected with the inlet of the second evaporation coil (27) through a pipeline, the outlet pipeline of the second evaporation coil (27) is connected with one of the 3 inlets of the return collector (6), each second fan (28) is installed at the air outlet of the local cooling unit (3, 4, 5) to which the second fan (28) belongs, and each second fan (28) is used for blowing out air cooled by the second evaporation coil (27) connected with the second fan; the outlet of the return device (6) is connected with the inlets of the electric valves (19, 32) which are connected in parallel through pipelines, the outlet of the sixth electric valve (19) is connected with the inlet of the second compressor (10) through a pipeline, the outlet of the second compressor (10) is connected with the inlet of the eighth electric valve (20) through a pipeline, and the common end of the outlet pipelines of the electric valves (20, 32) which are connected in parallel is connected with the other refrigerant inlet of the shell-and-tube heat exchanger (24) through a pipeline; the comprehensive cooling main machine (1) is arranged inside the closed mast (100) and used for controlling the overall temperature of the cabin and maintaining the environment required by the working of personnel in the cabin, and the local cooling units (3, 4 and 5) are arranged at the upper part of an electronic cabinet (104) in the closed mast (100) and used for eliminating the local high temperature at the upper part of the cabinet; the low-temperature refrigerant of the shell-and-tube heat exchanger (24) is delivered to a first evaporation coil (12) in the comprehensive cooling main machine (1) and a second evaporation coil (27) of 3 local cooling units through compressors (9, 10) or working medium pumps (14, 15) in two ways, the low-temperature refrigerant is evaporated in the evaporation coils (12, 27) to cool the surrounding air, and the cooled air is delivered to the cabin and the upper part of the cabinet through fans (13, 28); the external cooling seawater exchanges heat through a shell-and-tube heat exchanger (24) to take away heat absorbed by refrigerants in the comprehensive cooling main machine (1) and the local cooling units (3, 4 and 5).
2. The ship closed mast air conditioning system as claimed in claim 1, characterized in that when the seawater temperature sensor (25) detects that the seawater is at a high temperature, the electric valves (17, 18, 21, 22, 31, 32) and the working medium pumps (14, 15) are closed, the compressors (9, 10) and the electric valves (29, 30, 23, 16, 19, 20) are opened, and the refrigerant discharges the heat absorbed in the closed mast to the seawater through the shell-and-tube heat exchanger (24).
3. The ship closed mast air conditioning system as claimed in claim 1, characterized in that when the seawater temperature sensor (25) detects that the seawater temperature is low, the compressors (9, 10) and the electric valves (29, 30, 23, 16, 19, 20) are closed, the electric valves (17, 18, 21, 22, 31, 32) and the working medium pumps (14, 15) are opened, and the refrigerant absorbs heat and transfers the heat to the seawater directly through the shell-and-tube heat exchanger (24).
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| CN114162301A (en) * | 2021-12-17 | 2022-03-11 | 深圳市酷凌时代科技有限公司 | Water heat dissipation system |
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