A constant temperature system for a ship's cabin

Abstract

The present invention provides a constant temperature system for a ship cabin, including a first heat transfer medium circulation system, which includes a cold air duct, a liquid inlet pipeline, a liquid return pipeline, a first transfer pump, a first three-way valve, a second three-way valve, a first temperature sensor and a second temperature sensor; a second liquid return pipeline section connects the port two of the second three-way valve and the first liquid return pipeline; the second temperature sensor is communicatively connected to the second three-way valve; according to the cooperation between the temperature measured by the first temperature sensor and the first three-way valve, the liquid temperature of the second liquid inlet pipeline section is ensured to be stable within a predetermined temperature range; according to the cooperation between the second temperature sensor and the second three-way valve, the first heat transfer medium at a suitable temperature range enters the cold air duct; regardless of the temperature in the working cabin, the first transfer pump can always maintain an operating state, ensuring that there is always a source of the first heat transfer medium with a higher liquid temperature in the third liquid inlet pipeline section, and finally realizing the stability of the temperature in the ship cabin.

Description

Technical Field

[0001] The present invention relates to the field of shipbuilding, and particularly to a constant-temperature system for ship cabins. Background Art

[0002] With the rapid development of global shipping trade, the importance of the Baltic Sea shipping route in global shipping has been continuously increasing, and more and more shipping companies operate ships on this route. To ensure greater safety for ships in cold environments, such as weather conditions directly affecting ship safety production like cold snaps with strong winds, temperature drops with freezing, rain, snow, fog, and haze, it is more important to equip ships with cold protection systems.

[0003] In ship design, generally, ships do not consider heating the working cabins. However, in winter when the external environmental temperature ranges from -25°C to 0°C, the working cabins are only isolated from the outside by a single layer of cabin wall, and the temperature inside the working cabins is basically the same as the external temperature. Therefore, a constant-temperature system for ship cabins is needed to ensure that crew members can work in a relatively warm and comfortable environment and to prevent equipment from operating in harsh environmental temperatures. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the technical problem to be solved by the present invention is to provide a constant-temperature system for ship cabins.

[0005] The present invention provides a constant-temperature system for ship cabins, including a first heat transfer medium circulation system. The first heat transfer medium circulation system includes a cold air duct, a liquid inlet pipe, a liquid return pipe, a transfer pump, a first three-way valve, a second three-way valve, a first temperature sensor, and a second temperature sensor; the inlet end of the liquid inlet pipe is connected to the outlet end of the liquid return pipe, the liquid inlet pipe is provided with a first three-way valve and a second three-way valve, and the outlet end of the liquid inlet pipe is connected to the inlet end of the cold air duct; the inlet and outlet ports of the heat exchanger are respectively connected to a heat exchanger low-temperature side inlet pipe and a heat exchanger low-temperature side outlet pipe;

[0006] The liquid inlet pipe includes a first liquid inlet pipe section connecting the outlet end of the liquid return pipe and the heat exchanger low-temperature side inlet pipe, a second liquid inlet pipe section connecting the third port of the first three-way valve and the first port of the second three-way valve, and a third liquid inlet pipe connecting the third port of the second three-way valve and the inlet end of the cold air duct;

[0007] The heat exchanger low-temperature side inlet pipe is connected to the first port of the first three-way valve, and the heat exchanger low-temperature side outlet pipe is connected to the first port of the first three-way valve. The heat exchanger low-temperature side outlet pipe is connected to the second port of the second three-way valve;

[0008] The liquid return pipeline includes a first liquid return pipeline section and a second liquid return pipeline section. The first liquid return pipeline section connects the cold air duct outlet and the inlet of the liquid inlet pipeline; the second liquid return pipeline section connects the second port of the second three-way valve and the first liquid return pipeline.

[0009] The first temperature sensor is communicatively connected to the first three-way valve. The first temperature sensor is used to measure the temperature of the second liquid inlet pipeline section; when the temperature measured by the first temperature sensor is less than the second predetermined temperature, the second port and the third port of the first three-way valve are connected; when the temperature measured by the first temperature sensor is greater than the first predetermined temperature, the first port and the third port of the first three-way valve are connected.

[0010] The second temperature sensor is communicatively connected to the second three-way valve. The second temperature sensor is used to measure the temperature inside the cabin; when the temperature inside the cabin is less than the second predetermined temperature two, the first port and the third port of the second three-way valve are connected; when the temperature inside the cabin is greater than the second predetermined temperature one, the first port and the second port of the second three-way valve are connected.

[0011] Preferably, the constant temperature system for the ship's cabin further includes a first heat transfer medium replenishment system. The first heat transfer medium replenishment system includes a first heat transfer medium storage cabinet and a second transfer pump. The first heat transfer medium storage cabinet, the second transfer pump, and the first transfer pump are connected through a connecting pipeline.

[0012] Preferably, the first heat transfer medium is water glycol.

[0013] Preferably, the constant temperature system for the ship's cabin further includes a second heat transfer medium system and a third temperature sensor. The second heat transfer medium system includes a second heat transfer medium storage cabinet connected to the high-temperature side of the heat exchanger, a second transfer pump, and a delivery stop valve. The delivery stop valve is located at the inlet of the high-temperature side of the heat exchanger; the third temperature sensor is communicatively connected to the delivery stop valve. The third temperature sensor is used to measure the temperature of the low-temperature side of the heat exchanger; when the temperature of the low-temperature side is higher than the first third predetermined temperature, the delivery stop valve is closed; when the temperature of the low-temperature side is lower than the second third predetermined temperature, the delivery stop valve is opened.

[0014] Preferably, the inlet and outlet ends of the high-temperature side of the heat exchanger are further connected to a second heat transfer medium radiator located in the working cabin.

[0015] Preferably, the second heat transfer medium is hot oil.

[0016] As described above, a constant temperature system for a ship's cabin according to the present invention ensures that the liquid temperature in the second liquid inlet pipe section is stable within a predetermined temperature range according to the cooperation between the temperature measured by the first temperature sensor and the first three-way valve; and, according to the cooperation between the second temperature sensor and the second three-way valve, it ensures that the first heat transfer medium at an appropriate temperature range enters the cold air duct. At the same time, regardless of the temperature in the working cabin, the first transfer pump can always maintain an operating state, ensuring that there is always a source of the first heat transfer medium with a higher liquid temperature in the third liquid inlet pipe section, and finally achieving the stability of the temperature in the ship's cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a constant temperature system for a ship's cabin according to the present invention.

[0018] Description of the reference numerals:

[0019] 100, liquid inlet pipe; 101, first liquid inlet pipe section; 102, second liquid inlet pipe section; 103, third liquid inlet pipe section; 200, liquid return pipe; 201, first liquid return pipe section; 202, second liquid return pipe section; 300, first three-way valve; 301, first three-way valve port one; 302, first three-way valve port two; 303, first three-way valve port three; 310, second three-way valve; 311, second three-way valve port one; 312, second three-way valve port two; 313, second three-way valve port three; 320, first temperature sensor; 330, second temperature sensor; 400, cold air duct; 410, first transfer pump; 500, heat exchanger; 510, heat exchanger low-temperature side inlet pipe; 520, heat exchanger low-temperature side outlet pipe; 600, second heat transfer medium storage tank; 610, third transfer pump; 620, second heat transfer medium radiator; 630, oil pipeline; 640, third temperature sensor; 641, delivery cut-off valve; 700, first heat transfer medium storage tank; 710, second transfer pump; 720, expansion tank; 800, working cabin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0021] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present invention. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope for the implementation of the present invention.

[0022] As Figure 1 shown, an embodiment of a constant temperature system for a ship cabin includes a cold air duct 400, a liquid inlet pipe 100, a liquid return pipe 200, a first transfer pump 410, a first three-way valve 300, a second three-way valve 310, a first temperature sensor 320, and a second temperature sensor 330; the inlet end of the liquid inlet pipe 100 is connected to the outlet end of the liquid return pipe 200, and a first three-way valve 300 and a second three-way valve 310 are arranged on the liquid inlet pipe 100, and the outlet end of the liquid inlet pipe 100 is connected to the inlet end of the cold air duct 400; the inlet and outlet ports of the heat exchanger 500 are respectively connected to a heat exchanger low-temperature side inlet pipe 510 and a heat exchanger low-temperature side outlet pipe 520;

[0023] The liquid inlet pipe 100 includes a first liquid inlet pipe section 101 connecting the outlet end of the liquid return pipe 200 and the heat exchanger low-temperature side inlet pipe 510, a second liquid inlet pipe section 102 connecting the third port 303 of the first three-way valve and the first port 311 of the second three-way valve, and a third liquid inlet pipe section 103 connecting the third port 313 of the second three-way valve and the inlet end of the cold air duct 400;

[0024] The heat exchanger low-temperature side inlet pipe 510 is connected to the second port 302 of the first three-way valve, and the heat exchanger low-temperature side outlet pipe 520 is connected to the first port 301 of the first three-way valve;

[0025] The liquid return pipe 200 includes a first liquid return pipe section 201 and a second liquid return pipe section 202. The first liquid return pipe section 201 connects the outlet of the cold air duct 400 and the inlet of the liquid inlet pipe 100; the second liquid return pipe section 202 connects the second port 312 of the second three-way valve and the first liquid return pipe section 201;

[0026] The first temperature sensor 320 is communicatively connected to the first three-way valve 300. The first temperature sensor 320 is used to measure the temperature of the second liquid inlet pipeline section 102. When the temperature measured by the first temperature sensor 320 is less than the second first predetermined temperature, the second port 302 and the third port 303 of the first three-way valve are connected; when the temperature measured by the first temperature sensor 320 is greater than the first first predetermined temperature, the first port 301 and the third port 303 of the first three-way valve are connected;

[0027] The second temperature sensor 330 is communicatively connected to the second three-way valve 310. The second temperature sensor 330 is used to measure the temperature inside the working chamber 800. When the temperature inside the working chamber 800 is less than the second second predetermined temperature, the first port 311 and the third port 313 of the second three-way valve are connected; when the temperature inside the chamber is greater than the second first predetermined temperature, the first port 311 and the second port 312 of the second three-way valve are connected.

[0028] In this embodiment, the first transfer pump 410 starts normally. The first first predetermined temperature is 83 ± 0.5 °C, the first second predetermined temperature is 80 ± 0.5 °C, and the first heat transfer medium is liquid-ethylene glycol. When the temperature inside the second liquid inlet pipeline section 102 (i.e., the temperature measured by the first temperature sensor 320) is higher than 83 ± 0.5 °C, the first three-way valve 300 acts. The first port 301 and the third port 303 of the first three-way valve are connected and the second port 302 is closed. The liquid-ethylene glycol with a lower temperature in the first liquid inlet pipeline section 101 directly enters the second liquid inlet pipeline section 102, directly reducing the temperature inside the second liquid inlet pipeline section 102.

[0029] When the temperature inside the second liquid inlet pipeline section 102 (i.e., the temperature measured by the first temperature sensor 320) is lower than 80 ± 0.5 °C, the first three-way valve 300 acts. The second port 302 and the third port 303 of the first three-way valve are connected and the first port 301 is closed. The liquid-ethylene glycol with a lower temperature in the first liquid inlet pipeline section 101 enters the second liquid inlet pipeline section 102 after being heated by the heat exchanger 500, increasing the temperature inside the second liquid inlet pipe section 102. Through the cooperation of the first temperature sensor 320 and the first three-way valve 300, it is ensured that the water-ethylene glycol temperature of the second liquid inlet pipeline section 102 is always maintained between the first first predetermined temperature and the first second predetermined temperature.

[0030] In this embodiment, the second predetermined temperature two is -1±0.5°C lower than the set temperature in the working chamber, and the second predetermined temperature one is 5±0.5°C higher than the set temperature in the working chamber. For example, in this embodiment, if the set temperature in the working chamber is 5°C, then the second predetermined temperature two is 4±0.5°C, and the second predetermined temperature one is 10±0.5°C. When the temperature in the working chamber 800 is lower than 4±0.5°C, the first port 311 and the third port 313 of the second three-way valve are opened, the second port 312 of the second three-way valve is closed, and the relatively warm water glycol in the second liquid inlet pipe section 102 directly enters the ethylene glycol ventilation preheater to heat the working chamber 800.

[0031] When the temperature in the working chamber 800 is higher than 10±0.5°C, the first port 311 and the second port 312 of the second three-way valve are opened, the third port 313 of the second three-way valve is closed, and the relatively warm heat transfer medium in the second liquid inlet pipe section 102 cannot enter the ethylene glycol ventilation waste heat recovery device. The working chamber 800 gradually cools down with the ambient temperature. At the same time, the heat transfer medium in the second liquid inlet pipe section 102 returns to the inlet end of the first transfer pump 410 through the second return pipe section 202 and the first return pipe section 201, and then returns to the second liquid inlet pipe section 102 through the heat exchanger 500 or directly through the first liquid inlet pipe section 101, thereby ensuring that regardless of whether the ethylene glycol ventilation preheater is connected to the second liquid inlet pipe 102, the heat transfer medium in the second liquid inlet pipe 102 is always maintained between the first predetermined temperature one and the first predetermined temperature two, and can provide a high-temperature heat transfer medium with a constant temperature for the working chamber 800 at any time.

[0032] According to the cooperation between the temperature measured by the first temperature sensor 320 and the first three-way valve 300, the liquid temperature of the second liquid inlet pipe section 102 is ensured to be stable within a predetermined temperature range; and according to the cooperation between the second temperature sensor 330 and the second three-way valve 310, the liquid with a suitable temperature within a certain range enters the cold air duct. At the same time, regardless of the temperature in the working chamber, the first transfer pump can always maintain an operating state, ensuring that there is always a source of the first heat transfer medium with a relatively high liquid temperature in the third liquid inlet pipe section, and finally realizing the stability of the temperature in the ship's cabin.

[0033] The ship cabin constant temperature system further includes a first heat transfer medium replenishment system. The first heat transfer medium replenishment system includes a first heat transfer medium storage cabinet 700 and a second transfer pump 710. The first heat transfer medium storage cabinet 700, the second transfer pump 710, and the first transfer pump 410 are connected through a communication pipeline.

[0034] By starting the second transfer pump 710, the first heat transfer medium circulation system where the first transfer pump 410 is located can be supplemented with the first heat transfer medium. In this embodiment, the first heat transfer medium is water glycol. The first heat transfer medium replenishment system further includes a water glycol expansion tank 720 provided at the outlet of the second transfer pump 710. If there is too much water glycol, the excess solution will enter the water glycol expansion tank 720. This first heat transfer medium replenishment system can maintain the liquid volume in the first heat transfer medium circulation system and avoid the situation of too much or too little liquid in this circulation system.

[0035] This ship cabin constant temperature system further includes a second heat transfer medium system and a third temperature sensor 640. The second heat transfer medium system includes a second heat transfer medium storage tank 600, a second transfer pump 710, and a transfer cut-off valve 651 that are connected to the high-temperature side of the heat exchanger 500. The transfer cut-off valve 651 is located at the inlet of the high-temperature side of the heat exchanger 500; the third temperature sensor 640 is communicatively connected to the transfer cut-off valve 651, and the third temperature sensor 640 is used to measure the temperature of the low-temperature side of the heat exchanger 500; when the temperature of the low-temperature side of the heat exchanger 500 is higher than the first third predetermined temperature, the transfer cut-off valve 641 closes; when the temperature of the low-temperature side of the heat exchanger is lower than the second third predetermined temperature, the transfer cut-off valve 641 opens.

[0036] In this embodiment, the second heat transfer medium is hot oil, the first heat transfer medium is water glycol, the first third predetermined temperature is 90 °C, and the second third predetermined temperature is 70 °C. When the temperature of the low-temperature side of the heat exchanger 500 is lower than 70 °C, the transfer cut-off valve opens, and the water glycol is heated in the heat exchanger 500; when the temperature of the low-temperature side of the heat exchanger 500 is higher than 90 °C, the transfer cut-off valve 641 closes, and the supply of hot oil stops, preventing the water glycol solution inside the heat exchanger 500 from being continuously heated and causing danger.

[0037] Preferably, the inlet and outlet ends of the high-temperature side of the heat exchanger 500 are further connected to a hot oil radiator 620 located in the working cabin 800. In this embodiment, several hot oil radiators 620 of different specifications (specifications are 3KW, 6KW, 10KW) are arranged in the paint room, dry powder room, N2 room, bow thruster and emergency fire pump room, bosun and bow hydraulic equipment room, battery room, emergency fire pump room, fire equipment room, CO2 room, steering gear room, etc. according to the room size. The hot oil boiler heats the hot oil to 190 - 200 °C, and the third transfer pump 610 transports the hot oil to the hot oil radiators 620 in different rooms. The hot oil dissipates heat through the hot oil radiators 620, heating the cold air in the room, and finally the hot oil returns to the hot oil boiler to complete a heating cycle. At the same time, heat insulation cotton is laid on the cabin wall to reduce heat dissipation and improve the heat preservation effect.

[0038] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A constant temperature system for a ship's cabin, characterized in that, It includes a first heat transfer medium circulation system, which includes a cold air duct (400), a heat exchanger (500), a liquid inlet pipe (100), a liquid return pipe (200), a first transfer pump (410), a first three-way valve (300), a second three-way valve (310), a first temperature sensor (320) and a second temperature sensor (330); the inlet end of the liquid inlet pipe (100) is connected to the outlet end of the liquid return pipe (200), the first three-way valve (300) and the second three-way valve (310) are arranged on the liquid inlet pipe (100), and the outlet end of the liquid inlet pipe (100) is connected to the inlet end of the cold air duct (400); the inlet and outlet ports of the heat exchanger (500) are respectively connected with a low-temperature side inlet pipe (510) and a low-temperature side outlet pipe (520) of the heat exchanger; The first three-way valve (300) has a first three-way valve port one (301), a first three-way valve port two (302) and a first three-way valve port three (303); the second three-way valve (310) has a second three-way valve port one (311), a second three-way valve port two (312) and a second three-way valve port three (313); The liquid inlet pipe (100) includes a first liquid inlet pipe section (101) connecting the outlet end of the liquid return pipe (200) and the low-temperature side inlet pipe (510) of the heat exchanger, a second liquid inlet pipe section (102) connecting the first three-way valve port three (303) and the second three-way valve port one (311), and a third liquid inlet pipe section (103) connecting the second three-way valve port three (313) and the inlet end of the cold air duct (400); The low-temperature side inlet pipe (510) of the heat exchanger is connected to the first three-way valve port one (301), and the low-temperature side outlet pipe (520) of the heat exchanger is connected to the first three-way valve port two (302); The liquid return pipe (200) includes a first liquid return pipe section (201) and a second liquid return pipe section (202), the first liquid return pipe section (201) connects the outlet of the cold air duct (400) and the inlet of the liquid inlet pipe (100); the second liquid return pipe section (202) communicates the second three-way valve port two (312) with the first liquid return pipe section (201); The first temperature sensor (320) is communicatively connected to the first three-way valve (300), and the first temperature sensor (320) is used to measure the temperature of the second liquid inlet pipe section (102); when the temperature measured by the first temperature sensor (320) is less than the second first predetermined temperature, the first three-way valve port two (302) and the first three-way valve port three (303) are communicated; when the temperature measured by the first temperature sensor (320) is greater than the first first predetermined temperature, the first three-way valve port one (301) and the first three-way valve port three (303) are communicated; The second temperature sensor (330) is communicatively connected to the second three-way valve (310), and the second temperature sensor (330) is configured to measure the temperature inside the working chamber (800); when the temperature inside the working chamber is less than the second predetermined temperature two, the first port (311) and the third port (313) of the second three-way valve are in communication; when the temperature inside the chamber is greater than the first predetermined temperature one, the first port (311) and the second port (312) of the second three-way valve are in communication.

2. The constant temperature system for a ship's cabin according to claim 1, characterized in that, It further includes a first heat transfer medium replenishment system, and the first heat transfer medium replenishment system includes a first heat transfer medium storage cabinet (700) and a second transfer pump (710), and the first heat transfer medium storage cabinet (700), the second transfer pump (710) and the first transfer pump (410) are in communication through a connecting pipeline.

3. A constant temperature system for a ship's cabin according to claim 1 or 2, characterized in that, The first heat transfer medium is water glycol.

4. A constant temperature system for a ship's cabin according to claim 1 or 2, characterized in that, It further includes a second heat transfer medium system and a third temperature sensor (640). The second heat transfer medium system includes a second heat transfer medium storage cabinet (600), a third transfer pump (610) and a transfer stop valve (641) that are connected to the high-temperature side of the heat exchanger (500). The transfer stop valve (641) is located at the inlet of the high-temperature side of the heat exchanger (500); the third temperature sensor (640) is communicatively connected to the transfer stop valve (641), and the third temperature sensor is configured to measure the temperature of the low-temperature side of the heat exchanger (500); when the temperature of the low-temperature side of the heat exchanger (500) is higher than the first predetermined temperature one, the transfer stop valve (641) is closed; when the temperature of the low-temperature side is lower than the second predetermined temperature two, the transfer stop valve (641) is opened.

5. A constant temperature system for a ship's cabin according to claim 4, characterized in that, The inlet and outlet ends of the high-temperature side of the heat exchanger (500) are further connected to a second heat transfer medium radiator (620) located inside the working chamber (800).

6. The constant temperature system for a ship's cabin according to claim 4, wherein, The second heat transfer medium is hot oil.

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