A high-efficiency energy-saving ship heat pump system

Abstract

The application discloses a kind of high-efficiency energy-saving ship heat pump systems, including heat pump heater, waste heat recovery device and water tank;Upper and lower water storage chambers are formed by partition in water tank, and the water passage for connecting upper and lower water storage chambers is arranged on the partition, and temperature control switch for controlling water passage conduction or closing is arranged on the water passage;Heat pump heater includes heat pump outdoor unit and heat pump heat releasing coil arranged in lower water storage chamber and connected with heat pump outdoor unit;Waste heat recovery device includes waste heat absorption coil for absorbing heat in kitchen exhaust flue gas and waste heat releasing coil arranged in upper water storage chamber and connected with waste heat absorption coil.The waste heat in kitchen flue gas can be recovered by waste heat recovery device, and used for producing hot water, which can save energy consumption of ship;Hot water supply can be guaranteed by heat pump heater for supplementary heating.

Description

Technical Field

[0001] This invention relates to the field of heat pump systems, and in particular to a high-efficiency and energy-saving ship heat pump system. Background Technology

[0002] Hot water is essential for life on board ships, but producing hot water requires a lot of energy, especially on ships with limited energy resources. Since open flames cannot be used, a large amount of energy consumption and conversion is needed to support electric heating, which will affect the ship's range.

[0003] Currently, water heaters are commonly used to produce hot water, such as electric water heaters, solar water heaters, and heat pump water heaters. Among these, a heat pump is a highly efficient and energy-saving device that fully utilizes low-grade heat energy. Heat can spontaneously transfer from a high-temperature object to a low-temperature object, but not spontaneously in the opposite direction. The working principle of a heat pump is a mechanical device that forces heat to flow from a low-temperature object to a high-temperature object in a reverse circulation manner. It consumes only a small amount of net reverse circulation work to obtain a large amount of heat supply, effectively utilizing low-grade heat energy that is difficult to apply, thus achieving energy-saving goals. Due to these characteristics of heat pumps, heat pump water heaters are becoming increasingly common. Although heat pump water heaters have low energy consumption, they still require energy.

[0004] The cooking fumes produced in ship galleries contain a significant amount of heat energy. These fumes are typically emitted directly or after environmental treatment, resulting in wasted heat. Recovering this heat energy for hot water production could save energy. Existing technologies utilize waste heat from kitchen fumes to produce hot water; for example, patent 201120146141.6 discloses a kitchen waste heat recovery water heater, and patent 201510161931.4 discloses a kitchen waste heat recovery system. Both disclose solutions for using kitchen waste heat for hot water production. However, relying solely on kitchen waste heat for hot water production can lead to insufficient hot water supply when the waste heat is insufficient. Combining a heat pump hot water system with a kitchen waste heat hot water system could potentially solve this problem and increase the ship's range, but a reliable solution is currently lacking. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a highly efficient and energy-saving ship heat pump system, which addresses the shortcomings of the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a high-efficiency and energy-saving ship heat pump system, including a heat pump heater, a waste heat recovery device and a water tank; The water tank is divided into an upper water storage chamber and a lower water storage chamber by a partition plate. The partition plate is provided with a water outlet that connects the upper water storage chamber and the lower water storage chamber. A temperature control switch is provided on the water outlet to control the opening or closing of the water outlet. The heat pump heater includes an outdoor heat pump unit and a heat pump heat release coil connected to the outdoor heat pump unit and disposed in the lower water storage chamber. The waste heat recovery device includes a waste heat absorption coil for absorbing heat from the exhaust gas from the kitchen and a waste heat release coil connected to the waste heat absorption coil and disposed in the upper water storage chamber.

[0007] Preferably, the waste heat recovery device further includes an exhaust pipe installed above the stove in the kitchen and a filter device installed in the exhaust pipe, wherein the waste heat absorption coil is installed inside the exhaust pipe and above the filter device.

[0008] Preferably, the waste heat absorption coil includes at least two sets, and the at least two sets of waste heat absorption coils are arranged in a conical shape inside the flue pipe.

[0009] Preferably, the outer wall of the waste heat absorption coil is provided with several arc-shaped heat-conducting pipe sections, and both ends of the arc-shaped heat-conducting pipe sections are connected to the inside of the waste heat absorption coil.

[0010] Preferably, the upper water storage chamber is provided with a first water inlet, and the lower water storage chamber is provided with a second water inlet and a water outlet.

[0011] Preferably, when the water temperature in the upper water storage chamber is lower than the set range, the temperature control switch closes the water inlet, and the upper water storage chamber and the lower water storage chamber remain isolated; when the water temperature in the upper water storage chamber reaches the set range, the temperature control switch opens the water inlet, and the upper water storage chamber and the lower water storage chamber remain connected.

[0012] Preferably, the temperature control switch includes a mounting plate fixed to the inner wall of the upper water storage chamber, a pressure rod connected to the lower surface of the mounting plate via a compression spring, a sealing valve fixed to the bottom of the pressure rod for sealing the water outlet, and a plurality of temperature-sensing push-pull assemblies disposed between the sealing valve and the partition plate on the outer periphery of the water outlet. When the water temperature in the upper water storage chamber reaches the set range, the temperature-sensing push assembly generates an upward push force on the sealing valve, causing the sealing valve to disengage from the water inlet.

[0013] Preferably, the upper part of the water inlet is provided with an arc-shaped opening section; The upper outer periphery of the sealing valve is provided with a raised edge, and the lower part of the sealing valve has a spherical part for fitting into the arc-shaped opening to achieve a seal.

[0014] Preferably, the bottom of the spherical part is provided with a conical sealing post, and the lower end of the arc-shaped opening is connected to a conical hole for the conical sealing post to be inserted.

[0015] Preferably, the temperature-sensing push assembly includes a base fixed to a partition plate on the outer periphery of the water inlet, a receiving hole opened on the base, a push rod that is telescopically inserted into the receiving hole and whose upper end is fixed to the bottom of the protrusion, a temperature-sensing bulb disposed in the receiving hole and located at the lower end of the push rod, and a tension spring connected between the base and the protrusion. The temperature-sensing bulb includes an elastic bag and a temperature-sensing medium filled in the elastic bag. A guide sleeve is fixed to the bottom of the mounting plate, and the upper end of the pressure rod is inserted into the guide sleeve. A first bearing and a first sealing ring are provided between the pressure rod and the guide sleeve. A second bearing and a second sealing ring are provided between the push rod and the receiving hole. The base has an annular heat-conducting part in the middle, the inner wall of the annular heat-conducting part is in contact with the temperature sensing bulb, and the outer wall of the outer ring of the annular heat-conducting part extends out of the outer wall of the base.

[0016] The beneficial effects of this invention are: The high-efficiency and energy-saving ship heat pump system of the present invention can recover waste heat from kitchen fumes through a waste heat recovery device and use it to produce hot water, thus saving energy; and can ensure the supply of hot water by supplementing the heating of hot water through a heat pump heater. This invention, by setting up an upper and lower water storage chamber, enables the storage of water at two different temperatures. A waste heat recovery coil heats the water in the upper chamber, allowing water meeting the required temperature to automatically flow into the lower chamber for storage, thus maintaining the water in the upper chamber at a lower temperature. This improves the utilization efficiency of kitchen waste heat and reduces energy consumption. A heat pump heater supplements the heating of the water in the lower chamber, ensuring a supply of hot water at the required temperature. By isolating the two water storage spaces—the upper and lower chambers—with a single water tank, the invention reduces equipment size, saves costs, and minimizes the space occupied by the equipment. The temperature control switch of this invention can automatically open the water inlet when the temperature reaches the set range, so as to store the hot water in the upper water storage chamber into the lower water storage chamber. Through the repeated intermittent switching of the temperature control switch, only hot water that meets the temperature requirements can flow from the upper water storage chamber into the lower water storage chamber. The function of the temperature control switch can be realized through a simple mechanical structure, avoiding the use of complex control equipment, saving costs and reducing the complexity of use. In this invention, the heat absorption efficiency can be improved by absorbing heat from the flue gas through a conical waste heat absorption coil; the contact area between the waste heat absorption coil and the flue gas can be increased by setting an arc-shaped heat conduction pipe section, thereby improving the absorption effect and thus improving the overall efficiency of the waste heat recovery device, thereby enhancing the ship's endurance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the high-efficiency and energy-saving ship heat pump system in Embodiment 1 of the present invention (with the water inlet closed). Figure 2 This is a schematic diagram of the water tank in Embodiment 1 of the present invention (with the water inlet open); Figure 3 This is a schematic diagram of the temperature sensing switch in Embodiment 1 of the present invention (with the water inlet closed). Figure 4 This is a schematic diagram of the structure of the pressure rod and guide sleeve in Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the sealing valve in Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the water inlet structure in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the temperature-sensing push assembly in Embodiment 1 of the present invention (temperature-sensing bulb in retracted state). Figure 8 This is a schematic diagram of the mounting plate in Embodiment 1 of the present invention; Figure 9 This is a schematic diagram of the annular heat-conducting part in Embodiment 1 of the present invention; Figure 10 This is a schematic diagram of the temperature sensing switch in Embodiment 1 of the present invention (with the water inlet open); Figure 11 This is a schematic diagram of the temperature-sensing push assembly in Embodiment 1 of the present invention (temperature-sensing bulb in expansion state). Figure 12 This is a schematic diagram of the structure of the high-efficiency and energy-saving ship heat pump system in Embodiment 2 of the present invention; Figure 13 This is a schematic diagram of the structure of the high-efficiency and energy-saving ship heat pump system in Embodiment 3 of the present invention; Figure 14 This is a top view schematic diagram of the arrangement structure of the waste heat absorption coil in Embodiment 3 of the present invention; Figure 15 This is a schematic diagram of the structure of the waste heat absorption coil in Embodiment 3 of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1-Heat pump heater; 10-Compressor; 11-Condenser; 12-Throttling mechanism; 13-Evaporator; 14-Heat pump heat dissipation coil; 15-Heat pump circulation path; 16-First heat exchange pipeline; 17-Second heat exchange pipeline; 18-Heat pump outdoor unit; 2-Waste heat recovery device; 20-Waste heat absorption coil; 21-Waste heat release coil; 22-Smoke exhaust pipe; 23-Filter device; 24-Pipe body; 25-Arc-shaped heat conduction pipe section; 26-Mounting rod; 3-Water tank; 4-Upper water storage chamber; 40-First water inlet; 5 - Lower water storage chamber; 50 - Second water inlet; 51 - Water outlet; 6-Separator plate; 60-Water outlet; 61-Arc-shaped opening section; 62-Conical hole; 7-Temperature control switch; 70-Mounting plate; 71-Pressure rod; 72-Sealing valve; 73-Temperature-sensing push assembly; 74-Compression spring; 75-Guide sleeve; 76-First bearing; 77-First sealing ring; 78-Second bearing; 79-Second sealing ring; 720-Raised edge; 721-Spherical part; 722-Conical sealing column; 730-Base; 731-Receiving hole; 732-Push rod; 733-Temperature sensing bulb; 734-Tension spring; 735-Annular heat-conducting part; 7350-Inner ring of the annular heat-conducting part; 7351-Outer ring of the annular heat-conducting part; 8-Stove. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to embodiments, so that those skilled in the art can implement it based on the description.

[0020] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0021] Example 1

[0022] like Figure 1-11 As shown, this embodiment of a high-efficiency and energy-saving ship heat pump system includes a heat pump heater 1, a waste heat recovery device 2, and a water tank 3. The water tank 3 is divided into an upper water storage chamber 4 and a lower water storage chamber 5 by a partition plate 6. The partition plate 6 is provided with a water outlet that connects the upper water storage chamber 4 and the lower water storage chamber 5. A temperature control switch 7 is provided on the water outlet to control the opening or closing of the water outlet.

[0023] The heat pump heater 1 includes a heat pump outdoor unit 18 and a heat pump heat dissipation coil 14 connected to the heat pump outdoor unit 18 and disposed in the lower water storage chamber 5; the heat pump heater 1 is used to heat the water in the lower water storage chamber 5.

[0024] The waste heat recovery device 2 includes a waste heat absorption coil 20 for absorbing heat from the exhaust gas from the kitchen and a waste heat release coil 21 connected to the waste heat absorption coil 20 and disposed in the upper water storage chamber 4. The waste heat recovery device 2 recovers waste heat from the kitchen exhaust gas through the waste heat absorption coil 20 and then transfers it to the waste heat release coil 21 to heat the water in the upper water storage chamber 4.

[0025] Furthermore, the waste heat recovery device 2 also includes an exhaust pipe 22 installed above the stove 8 in the kitchen and a filter device 23 installed in the exhaust pipe 22. The stove 8 is generally an electric stove, which also requires a large amount of electricity for heating. The waste heat absorption coil 20 is fixedly installed inside the exhaust pipe 22 by a mounting rod 26 and is located above the filter device 23. In kitchens with range hoods, the exhaust pipe 22 can be connected to the range hood installed above it. The filter device 23 can be a conventional filter used to filter oil fumes.

[0026] When the water temperature in the upper water chamber 4 is lower than the set range, the temperature control switch 7 closes the water inlet, keeping the upper water chamber 4 and the lower water chamber 5 isolated; when the water temperature in the upper water chamber 4 reaches the set range, the temperature control switch 7 opens the water inlet, keeping the upper water chamber 4 and the lower water chamber 5 connected.

[0027] When the water temperature in the upper water chamber 4 is below the set range, the temperature control switch 7 closes the inlet, isolating the upper water chamber 4 from the lower water chamber 5. When the water temperature in the upper water chamber 4 reaches the set range, the temperature control switch 7 opens the inlet, connecting the upper water chamber 4 and the lower water chamber 5. The volume of the upper water chamber 4 is smaller than that of the lower water chamber 5, preferably 1.5-8 times the volume of the upper water chamber 4. Conventional insulation layers are installed on the inner or outer walls of both the upper and lower water chambers 4 and 5 to improve the insulation effect of the water tank 3. The partition plate 6 is also made of insulation material or by applying an insulation layer to its surface to ensure good heat insulation between the upper and lower water chambers 4 and 5.

[0028] This invention provides a high-efficiency, energy-saving shipboard heat pump system for hot water production. The waste heat recovery device 2 preheats the water in the upper storage chamber 4, ensuring the water reaches the required temperature before flowing into the lower storage chamber 5. The heat pump heater 1 is primarily used to heat water when the heat recovered by the waste heat recovery device 2 is insufficient to meet the hot water demand. Specifically, the waste heat release coil 21 heats the water in the upper storage chamber 4. Only when the water temperature in the upper storage chamber 4 reaches a set range (e.g., above 40-45°C) will the hot water automatically flow into the lower storage chamber 5. If the current water temperature meets the usage requirements, the water in the lower storage chamber 5 can be used directly. If the temperature is still too low, the heat pump heater 1 is activated to reheat the water in the lower storage chamber 5 to reach the usable temperature. For example, when the kitchen stove 8 is used for a short period, the heat recovered by the waste heat recovery device 2 may be insufficient, resulting in insufficient water temperature or insufficient hot water volume when heated by the release coil. In this case, heating by the heat pump heater 1 ensures both the quantity and temperature of hot water.

[0029] Since the waste heat recovery device 2 consumes virtually no energy, users want to maximize the use of the heat recovered by it to reduce energy consumption in hot water production. Therefore, it's necessary to improve the efficiency of the waste heat recovery device 2 and utilize it more extensively for water heating. However, in actual use of water heaters, users often want the water temperature in tank 3 to remain at a usable level, especially in the morning. Typically, after use, some hot water remains in tank 3, keeping it at a relatively high temperature. Considering this, placing the heat pump heating coil 14 and the waste heat recovery coil 21 within the interconnected tank 3 presents the following drawback: when the heat pump heating coil 14 heats, it heats the entire tank 3. For example, when the kitchen is not in use and the user needs hot water, the heat pump heater 1 heats the entire tank 3, effectively consuming additional energy to heat the water in the upper storage chamber 4. After use, the water in tank 3 remains at a high temperature. When the kitchen is in use, the water temperature in the water tank 3 is relatively high, which reduces the total amount and efficiency of heat recovery from the kitchen waste heat by the waste heat recovery device 2, making it difficult to make full use of the kitchen waste heat.

[0030] Therefore, in this invention, the upper water storage chamber 4 and the lower water storage chamber 5 are separated. When hot water is heated by the heat pump heater 1, the water in the lower water storage chamber 5 is heated, which reduces the energy required to heat the water in the upper water storage chamber 4. After use, the water in the upper water storage chamber 4 is kept at a low temperature, so that the residual heat of the kitchen can be fully utilized to heat the water in the upper water storage chamber 4, which can reduce the energy consumption of hot water.

[0031] In this invention, the waste heat recovery device 2 mainly recovers waste heat from the kitchen to heat the water in the upper water storage chamber 4. The heated water automatically flows into the lower water storage chamber 5 for storage, ensuring that the upper water storage chamber 4 maintains a relatively low temperature, thus improving the efficiency of waste heat utilization. In a preferred embodiment, the set critical temperature (the lowest temperature at which the temperature control switch 7 is turned on) can be selected to be slightly lower than the required temperature. For example, since the temperature for hot water used for daily washing is generally 45-55℃, the critical temperature can be set to 40℃ or 45℃. Once the water in the upper water storage chamber 4 reaches the critical temperature, it is discharged into the lower water storage chamber 5 for storage. When using hot water, it is then heated to 45-50℃ by the heat pump heater 1. Since the water in the upper water storage chamber 4 needs to reach the critical temperature before flowing into the lower water storage chamber 5, a lower critical temperature is selected when the kitchen waste heat is not sufficient to ensure that the hot water in the upper water storage chamber 4 can be fully utilized. For example, if the residual heat in the kitchen is insufficient and the critical temperature is too high, the water in the upper water storage chamber 4 may not be able to reach the critical temperature, or the amount of water that can be heated to the critical temperature may be very low, thus reducing the utilization rate of residual heat. Therefore, an appropriate critical temperature should be selected based on the user's actual situation.

[0032] The upper water storage chamber 4 is equipped with a first water inlet 40, and the lower water storage chamber 5 is equipped with a second water inlet 50 and an outlet 51. The first water inlet 40 can be directly connected to the water inlet or connected to the cold water storage tank 3 to replenish cold water in the upper water storage chamber 4. The outlet 51 is the outlet for the produced hot water; hot water that has reached the usage temperature is discharged from the outlet 51. When the hot water produced by the kitchen waste heat is insufficient, the water flowing into the lower water storage chamber 5 from the upper water storage chamber 4 is insufficient to fill the lower water storage chamber 5. At this time, cold water is replenished to the lower water storage chamber 5 through the second water inlet 50, and then the heat pump heater 1 is used. In a preferred embodiment, a transparent observation window can be provided on the side of the lower water storage chamber 5 to observe the water level in the lower water storage chamber 5. If the water level in the lower water storage chamber 5 is insufficient when hot water is needed, the second water inlet 50 can be opened to replenish cold water, and the heat pump heater 1 can be started to heat the water. In a more preferred embodiment, the water level in the lower water chamber 5 can be detected by installing a level gauge (a conventional level gauge is acceptable) in the lower water chamber 5, and the result of the level gauge can be displayed through the water tank 3 or an external display device so that the user can know the water level in the lower water chamber 5.

[0033] In a further preferred embodiment, the temperature control switch 7 includes a mounting plate 70 fixed to the inner wall of the upper water storage chamber 4, a pressure rod 71 connected to the lower surface of the mounting plate 70 via a compression spring 74, a sealing valve 72 fixed to the bottom of the pressure rod 71 for sealing the water outlet 60, and a plurality of temperature-sensing push-pull assemblies 73 disposed between the sealing valve 72 and the partition plate 6 on the outer periphery of the water outlet 60. When the water temperature in the upper water storage chamber 4 reaches the set range, the temperature-sensing push assembly 73 generates an upward push force on the sealing valve 72, causing the sealing valve 72 to disengage from the water outlet 60.

[0034] Furthermore, the upper part of the water inlet 60 is provided with an arc-shaped opening section 61; the upper outer periphery of the sealing valve 72 is provided with a raised edge 720, and the lower part of the sealing valve 72 has a spherical part 721 for fitting into the arc-shaped opening section 61 to achieve a seal. In a further embodiment, the bottom of the spherical part 721 is provided with a conical sealing post 722, and the lower end of the arc-shaped opening section 61 is connected to a conical hole 62 for the conical sealing post 722 to fit into. The conical sealing post 722 is preferably an elastic post, which is beneficial for sealing. When the sealing valve 72 is inserted into the water inlet 60 to seal, the spherical part 721 is inserted into the arc-shaped opening section 61, and the conical sealing post 722 is inserted into the conical hole 62, thereby forming a double-layer sealing structure, which can ensure the effective sealing of the water inlet 60.

[0035] Furthermore, the temperature-sensing push assembly 73 includes a base 730 fixed to a partition plate 6 on the outer periphery of the inlet 60, a receiving hole 731 opened in the base 730, a push rod 732 telescopically inserted into the receiving hole 731 and whose upper end is fixed to the bottom of the flange 720, a temperature-sensing bulb 733 disposed in the receiving hole 731 and located at the lower end of the push rod 732, and a tension spring 734 connecting the base 730 and the flange 720. The temperature-sensing bulb 733 includes an elastic bag body and a temperature-sensing medium filled in the elastic bag body; the elastic bag body has good elastic deformation performance and can deform with the expansion of the internal temperature-sensing medium. The compression spring 74 and the tension spring 734 are used to provide a downward force to press the sealing valve 72 tightly against the inlet 60 to maintain a seal.

[0036] In this embodiment, the temperature-sensing medium expands in volume when the temperature rises and recovers when the temperature falls. The elastic bag also has good shrinkage properties, allowing it to adapt to the expansion and contraction of the temperature-sensing medium. When the temperature rises, the expansion of the temperature-sensing medium causes the elastic bag to expand, thereby pushing the push rod 732 upwards and generating a driving force to push the sealing valve 72 upwards. Since the typical daily hot water temperature requirement is 40-50℃ (mainly for washing), the temperature-sensing medium in this embodiment preferably begins to expand at 40-50℃, more preferably at around 40℃. When the temperature is around 45℃, the sealing valve 72 can completely disengage from the water outlet 60, allowing the water outlet 60 to fully open. This means that when the water temperature in the upper water storage chamber 4 reaches around 45℃, it can flow into the lower water storage chamber 5. Therefore, the actual upper limit of the water temperature in the upper water storage chamber 4 is set at around 45℃. Understandably, since the water temperature setting doesn't need to be too precise—as long as it meets the usage requirements—the temperature range from when the temperature-sensing medium begins to expand until the water outlet 60 can fully open also doesn't need to be precise; generally, 40-50℃ is sufficient. Therefore, the above requirements can be met by selecting from existing conventional temperature-sensing media, or by choosing a suitable size or material for the elastic bag: that is, when the temperature reaches 40-50℃, the expansion of the temperature-sensing medium causes the elastic bag to expand and deform, ultimately allowing the water outlet 60 to fully open. The temperature-sensing medium can be a solid medium, such as paraffin, or a liquid or gaseous medium.

[0037] For example, in one embodiment, the temperature-sensing medium is selected from the waxy temperature-sensing medium used in the temperature control switch 7 disclosed in patent application number CN00123218.5, which exhibits significant volume expansion in the range of 40-70°C. By selecting an appropriately sized elastic bag, the amount of temperature-sensing medium filling it, and the size of the receiving hole 731, the water outlet 60 can be fully opened when the set temperature is reached. For example, in a further embodiment, the set temperature is approximately 45°C. When the temperature rises to approximately 45°C, the temperature-sensing bag 733 expands to approximately 1.25 times its original volume, and the height of the temperature-sensing bag 733 increases from approximately 4 cm to approximately 5 cm. At this point, the temperature-sensing bag 733 can push the push rod 732 upward by approximately 1 cm. When the sealing valve 72 moves upward by approximately 1 cm, it can disengage from the water outlet 60, allowing the water outlet 60 to open fully. Of course, by selecting the temperature-sensing medium and designing the elastic bag and the size of the receiving hole 731, different required temperatures can be set. It is understandable that when the temperature sensing bulb 733 expands, the distance that the push rod 732 moves upward does not need to be precise. A little more or a little less is fine. As long as the water outlet 60 can be opened and the water in the upper water storage chamber 4 can flow into the lower water storage chamber 5, the function of the temperature control switch 7 can be realized.

[0038] Furthermore, a guide sleeve 75 is fixedly connected to the bottom of the mounting plate 70, and the upper end of the pressure rod 71 is inserted into the guide sleeve 75.

[0039] The working principle of temperature control switch 7 is as follows: When the water temperature in the upper water chamber 4 rises to the lower limit of the temperature-sensing medium's expansion temperature, the temperature-sensing medium absorbs heat and expands, causing the temperature-sensing bulb 733 to increase in volume. Due to the size limitation of the receiving orifice 731, the upper part of the temperature-sensing bulb 733 pushes the push rod 732 upward. The upward thrust gradually exceeds the sum of the downward tension of the tension spring 734 and the downward pressure of the compression spring 74, causing the sealing valve 72 to move upward. The tension spring 734 is stretched, and the pressure rod 71 moves upward, squeezing the compression spring 74 deeper into the guide sleeve 75. This causes the spherical part 721 at the lower part of the sealing valve 72 to gradually move upward away from the arc-shaped opening section 61, and the water outlet 60 to gradually open. Water in the upper water chamber 4 flows downward through the water outlet 60 into the lower water chamber 5. (Refer to...) Figure 2 , 10 And 11; Under the pressure of the inlet water or the cold water storage tank 3, cold water is automatically replenished into the upper storage chamber 4 from the first inlet 40. After the cold water is replenished, the water temperature in the upper storage chamber 4 begins to drop, and the temperature sensing bulb 733 gradually contracts. Under the downward force of the compression spring 74 and the tension spring 734, the spherical part 721 gradually inserts downward into the arc-shaped opening 61 and returns to its original position until it is completely sealed. The water flowing from the upper storage chamber 4 into the lower storage chamber 5 gradually decreases until it reaches zero. (Refer to...) Figure 1 , 3 When the water temperature in the upper water storage chamber 4 rises to the required range (e.g., around 45°C), the water outlet 60 will open again. The water outlet 60 opens intermittently in this manner, ensuring that only water with a temperature meeting the required range (e.g., around 45°C) can automatically flow into the lower water storage chamber 5 for heat preservation and storage. Automatic water replenishment is also possible, fully utilizing waste heat to heat the water in the upper water storage chamber 4. Once the water temperature reaches the required range, it is discharged into the lower water storage chamber 5, ensuring that the upper water storage chamber 4 is always heated using waste heat until the entire water tank 3 is full of hot water. This invention achieves the function of the temperature control switch 7 through a simple mechanical structure, avoiding the use of complex control equipment, saving costs, reducing operational complexity, and simplifying the equipment.

[0040] In a more preferred embodiment, a first bearing 76 and a first sealing ring 77 are provided between the pressure rod 71 and the guide sleeve 75. The first bearing 76 guides the pressure rod 71 to maintain linear up-and-down movement. The first sealing ring 77 is located at the lower part of the first shaft to seal the inside of the guide sleeve 75 without affecting the up-and-down sliding of the pressure rod 71. A second bearing 78 and a second sealing ring 79 are provided between the push rod 732 and the receiving hole 731. The second bearing 78 guides the push rod 732 to maintain linear up-and-down movement. The second sealing ring 79 is located at the upper part of the second shaft to seal the inside of the receiving hole 731 without affecting the up-and-down sliding of the pressure rod 71. By providing the first sealing ring 77 and the second sealing ring 79, water can be prevented from entering the guide sleeve 75 or the receiving hole 731.

[0041] In a more preferred embodiment, an annular heat-conducting part 735 is provided in the middle of the base 730. The inner wall of the inner ring 7350 of the annular heat-conducting part contacts the temperature sensing bulb 733, and the outer wall of the outer ring 7351 of the annular heat-conducting part extends out of the outer wall of the base 730. The annular heat-conducting part 735 is made of a material with good thermal conductivity, such as copper, and has a rust-proof layer or a waterproof layer on its surface to extend its service life. The annular heat-conducting part 735 can improve the heat conduction efficiency and facilitate the uniform transfer of heat in the water to the outer periphery of the temperature sensing bulb 733, so that the overall volume deformation of the temperature sensing bulb 733 is uniform when it absorbs heat and expands.

[0042] In a more preferred embodiment, each component in the temperature control switch 7 is made of conventional rust-proof material or has a conventional rust-proof layer on its surface to ensure long-term use in water.

[0043] In one embodiment, the operation process of the high-efficiency and energy-saving ship heat pump system of the present invention is as follows: Initially, cold water is added to the upper water storage chamber 4 through the first inlet 40, leaving the lower water storage chamber 5 empty. The critical temperature in the upper water storage chamber 4 is set at approximately 45°C. When waste heat is generated during cooking in the kitchen, the waste heat recovery device 2 operates to heat the water in the upper water storage chamber 4. When the water temperature reaches approximately 45°C, the outlet 60 opens, allowing some hot water to flow downwards into the lower water storage chamber 5 for storage. Simultaneously, cold water is added to the upper water storage chamber 4 through the first inlet 40, causing the water level in the upper water storage chamber 4 to drop. The outlet 60 then closes. If there is sufficient waste heat in the kitchen, after a period of time, through multiple cycles of opening and closing the outlet 60, both the upper water storage chamber 4 and the lower water storage chamber 5 will be filled with hot water. If the water at approximately 45°C meets the current usage requirements, hot water can be directly taken from the outlet 51. If the water temperature of approximately 45°C is still insufficient, for example, if 50°C water is required, the water at approximately 45°C is further heated to 50°C by the heat pump heater 1 before use. This allows for the full utilization of waste heat in the kitchen to produce hot water, saving energy. If the waste heat in the kitchen is insufficient and the lower water storage chamber 5 is not full of hot water, water is first added to the lower water storage chamber 5 through the second water inlet 50, and then the water is heated to 50°C by the heat pump heater 1 before use.

[0044] It is important to understand that the critical temperature can be set to a lower value, so that even if the kitchen waste heat is insufficient, the waste heat recovery device 2 can still produce preheated water at a certain temperature. Then, the preheated water can be reheated to the usage temperature by the heat pump heater 1, so as to ensure that the kitchen waste heat can be fully utilized even when it is insufficient.

[0045] Example 2

[0046] Based on Embodiment 1, in a further preferred embodiment, the outdoor unit 18 of the heat pump includes a compressor 10, a condenser 11, a throttling mechanism 12, and an evaporator 13 connected sequentially by pipes. The outlet end of the evaporator 13 is connected back to the return port of the compressor 10 through a pipe to form a heat pump circulation path 15. The refrigerant flowing in the heat pump circulation path 15 can be a conventional refrigerant; in this embodiment, carbon dioxide is selected as the refrigerant. The refrigerant flows back to the compressor 10 after passing through the compressor 10, condenser 11, throttling mechanism 12, and evaporator 13, forming a cycle. In the condenser 11, the heat emitted by the refrigerant in the first heat exchange pipe 16 is absorbed by the refrigerant in the adjacent second heat exchange pipe 17, and then transferred to the heat pump heat release coil 14 to heat the water in the lower water storage chamber 5.

[0047] The condenser 11 has a first heat exchange pipe 16 and a second heat exchange pipe 17 arranged adjacent to each other. The first heat exchange pipe 16 is connected to the heat pump circulation passage 15, and the second heat exchange pipe 17 is connected to the heat pump heat dissipation coil 14.

[0048] Example 3

[0049] Based on Example 1, a further preferred embodiment includes at least two sets of waste heat absorption coils 20, and these at least two sets of waste heat absorption coils 20 are arranged in a conical shape inside the exhaust pipe 22. This embodiment includes two sets, symmetrically arranged and tilted, which improves heat absorption efficiency by fully absorbing the heat from the flue gas in the exhaust pipe 22.

[0050] In a more preferred embodiment, the outer wall of the tube body 24 of the waste heat absorption coil 20 is provided with several arc-shaped heat-conducting pipe sections 25, both ends of which are connected to the interior of the tube body 24 of the waste heat absorption coil 20. The refrigerant in the waste heat absorption coil 20 (a conventional refrigerant can be used) flows through the tube body 24 and the arc-shaped heat-conducting pipe sections 25. By setting the arc-shaped heat-conducting pipe sections 25, the contact area between the waste heat absorption coil 20 and the flue gas can be increased, improving the absorption effect, thereby improving the overall efficiency of the waste heat recovery device 2, and thus enhancing the ship's endurance.

[0051] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details.

Claims

1. A high-efficiency and energy-saving shipboard heat pump system, characterized in that, This includes a heat pump heater, a waste heat recovery device, and a water tank; The water tank is divided into an upper water storage chamber and a lower water storage chamber by a partition plate. The partition plate is provided with a water outlet that connects the upper water storage chamber and the lower water storage chamber. A temperature control switch is provided on the water outlet to control the opening or closing of the water outlet. The heat pump heater includes an outdoor heat pump unit and a heat pump heat release coil connected to the outdoor heat pump unit and disposed in the lower water storage chamber. The waste heat recovery device includes a waste heat absorption coil for absorbing heat from the flue gas discharged from the kitchen and a waste heat release coil connected to the waste heat absorption coil and disposed in the upper water storage chamber. When the water temperature in the upper water storage chamber is lower than the set range, the temperature control switch closes the water inlet, and the upper water storage chamber and the lower water storage chamber remain isolated; when the water temperature in the upper water storage chamber reaches the set range, the temperature control switch opens the water inlet, and the upper water storage chamber and the lower water storage chamber remain connected.

2. The high-efficiency and energy-saving ship heat pump system according to claim 1, characterized in that, The waste heat recovery device also includes an exhaust pipe installed above the stove in the kitchen and a filter device installed in the exhaust pipe. The waste heat absorption coil is installed inside the exhaust pipe and above the filter device.

3. The high-efficiency and energy-saving ship heat pump system according to claim 2, characterized in that, The waste heat absorption coil includes at least two sets, and the at least two sets of waste heat absorption coils are arranged in a conical shape inside the flue pipe.

4. The high-efficiency and energy-saving ship heat pump system according to claim 3, characterized in that, The outer wall of the waste heat absorption coil is provided with several arc-shaped heat-conducting pipe sections, and both ends of the arc-shaped heat-conducting pipe sections are connected to the inside of the waste heat absorption coil.

5. The high-efficiency and energy-saving ship heat pump system according to claim 1, characterized in that, The upper water storage chamber is provided with a first water inlet, and the lower water storage chamber is provided with a second water inlet and a water outlet.

6. The high-efficiency and energy-saving ship heat pump system according to claim 1, characterized in that, The temperature control switch includes a mounting plate fixed to the inner wall of the upper water storage chamber, a pressure rod connected to the lower surface of the mounting plate via a compression spring, a sealing valve fixed to the bottom of the pressure rod for sealing the water outlet, and a plurality of temperature-sensing push-pull assemblies disposed between the sealing valve and the partition plate on the outer periphery of the water outlet. When the water temperature in the upper water storage chamber reaches the set range, the temperature-sensing push assembly generates an upward push force on the sealing valve, causing the sealing valve to disengage from the water inlet.

7. The high-efficiency and energy-saving ship heat pump system according to claim 6, characterized in that, The upper part of the water inlet is provided with an arc-shaped opening section; The upper outer periphery of the sealing valve is provided with a raised edge, and the lower part of the sealing valve has a spherical part for fitting into the arc-shaped opening to achieve a seal.

8. The high-efficiency and energy-saving ship heat pump system according to claim 7, characterized in that, The bottom of the spherical part is provided with a conical sealing post, and the lower end of the arc-shaped opening is connected to a conical hole for the conical sealing post to be inserted.

9. The high-efficiency and energy-saving ship heat pump system according to claim 8, characterized in that, The temperature-sensing push assembly includes a base fixed to a partition plate on the outer periphery of the water inlet, a receiving hole opened on the base, a push rod that is telescopically inserted into the receiving hole and whose upper end is fixed to the bottom of the protruding edge, a temperature-sensing bulb disposed in the receiving hole and located at the lower end of the push rod, and a tension spring connected between the base and the protruding edge. The temperature-sensing bulb includes an elastic bag and a temperature-sensing medium filled in the elastic bag. A guide sleeve is fixed to the bottom of the mounting plate, and the upper end of the pressure rod is inserted into the guide sleeve. A first bearing and a first sealing ring are provided between the pressure rod and the guide sleeve. A second bearing and a second sealing ring are provided between the push rod and the receiving hole. The base has an annular heat-conducting part in the middle, the inner wall of the annular heat-conducting part is in contact with the temperature sensing bulb, and the outer wall of the outer ring of the annular heat-conducting part extends out of the outer wall of the base.

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