Carbon dioxide heat pump system capable of simultaneously heating and refrigerating

Abstract

The invention provides a carbon dioxide heat pump system capable of simultaneously heating and refrigerating. The carbon dioxide heat pump system capable of heating and refrigerating simultaneously comprises a heat pump system body, the heat pump system body comprises a pipeline, a compressor, a hot water tank, a high-pressure side radiator, a cold water tank, a low-pressure side radiator and a cooling fan, R744 refrigerants circulate in the pipeline, the pipeline comprises a first pipe section, a second pipe section, a third pipe section and a fourth pipe section, and the first pipe section is communicated with the compressor. The first pipe section, the second pipe section, the third pipe section and the fourth pipe section are sequentially connected end to end, the compressor is located between the first pipe section and the fourth pipe section, the hot water tank is arranged outside the first pipe section, and the high-pressure side radiator is arranged outside the second pipe section. The carbon dioxide heat pump system capable of heating and refrigerating simultaneously has the advantages that safety is high, energy waste in heat circulation is reduced, cost can be saved, and the carbon dioxide heat pump system is more environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the field of heat pump systems and refrigeration technology, and in particular to a carbon dioxide heat pump system capable of simultaneous heating and cooling. Background Art

[0002] Temperature control in existing buildings or industrial processes is typically achieved by separate heating systems (such as boilers and electric heaters) and cooling systems (such as air conditioners and chillers). While these systems can meet single heating or cooling needs, many modern buildings and specific industrial applications often require both cooling and heating. For example, a home air conditioner requires cooling, while a bathroom water heater in the same building may require heating to produce hot water. Similarly, some industrial processes may involve both exothermic reactions (requiring cooling) and endothermic reactions (requiring heating).

[0003] Therefore, it is necessary to provide a new carbon dioxide heat pump system that can heat and cool at the same time to solve the above technical problems. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide a carbon dioxide heat pump system that is highly safe, reduces energy waste in the thermal cycle, can save costs and is more environmentally friendly for simultaneous heating and cooling.

[0005] To solve the above technical problems, the present invention provides a carbon dioxide heat pump system for simultaneous heating and cooling, including: a heat pump system, the heat pump system including a pipeline, a compressor, a hot water tank, a high-pressure side radiator, a cold water tank, a low-pressure side radiator and a cooling fan, R744 refrigerant circulates in the pipeline, the pipeline includes a first pipe section, a second pipe section, a third pipe section and a fourth pipe section, the first pipe section, the second pipe section, the third pipe section and the fourth pipe section are connected end to end in sequence, the compressor is located between the first pipe section and the fourth pipe section, the hot water tank is arranged outside the first pipe section, the high-pressure side radiator is arranged outside the second pipe section, the cold water tank is arranged outside the third pipe section, the low-pressure side radiator is outside the fourth pipe section, the cooling fan is located on the side of the high-pressure side radiator away from the low-pressure side radiator, and a first electronic expansion valve is provided between the second pipe section and the third pipe section.

[0006] Preferably, it further comprises a refrigerant storage tank, the outlet and inlet of the refrigerant storage tank are respectively connected to the first pipe section and the fourth pipe section, and the outlet and inlet of the refrigerant storage tank are respectively provided with a second electronic expansion valve and a third electronic expansion valve.

[0007] Preferably, the high-pressure side radiator and the low-pressure side radiator are separately arranged.

[0008] Preferably, the high-pressure side radiator and the low-pressure side radiator are arranged to overlap.

[0009] Compared with related technologies, the simultaneous heating and cooling carbon dioxide heat pump system provided by the present invention has the following beneficial effects: The present invention provides a carbon dioxide heat pump system that can simultaneously heat and cool. The system has both heating and cooling effects, thereby reducing waste in the heat cycle, saving costs, and being more environmentally friendly. The system uses R744 refrigerant, which has an extremely low GWP value and can slow down global warming without damaging the ozone layer. It is highly safe and has excellent thermodynamic properties, making the heat pump system more efficient, more energy-efficient, and less expensive. When the high-pressure side radiator and the low-pressure side radiator are arranged in an overlapping manner, the heat from the high-pressure side radiator is transferred to the low-pressure side radiator by a cooling fan, so that the refrigerant in the fourth pipe section is heated and then returned to the compressor, thereby improving the system circulation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A structural schematic diagram of a preferred embodiment of a carbon dioxide heat pump system for simultaneous heating and cooling provided by the present invention; Figure 2 for Figure 1 Schematic diagram of the movement of fluid or gas after the compressor and water pump are started.

[0011] Numbers in the figure: 10, heat pump system, 101, first electronic expansion valve, 102, second electronic expansion valve, 103, third electronic expansion valve, 11, pipeline, 111, first pipe section, 112, second pipe section, 113, third pipe section, 114, fourth pipe section, 12, compressor, 13, hot water tank, 131, hot water pump, 14, high-pressure side radiator, 15, cold water tank, 151, cold water pump, 16, low-pressure side radiator, 17, cooling fan, 18, refrigerant storage tank. DETAILED DESCRIPTION

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Please refer to Figure 1 and Figure 2 ,in, Figure 1 A structural schematic diagram of a preferred embodiment of a carbon dioxide heat pump system for simultaneous heating and cooling provided by the present invention; Figure 2 for Figure 1The diagram shows the movement of fluid or gas after the compressor and water pump are started. The carbon dioxide heat pump system for simultaneous heating and cooling includes: a heat pump system 10, wherein the heat pump system 10 includes a pipeline 11, a compressor 12, a hot water tank 13, a high-pressure side radiator 14, a cold water tank 15, a low-pressure side radiator 16 and a cooling fan 17. The pipeline 11 contains R744 refrigerant for circulation. The pipeline 11 has a first pipe section 111, a second pipe section 112, a third pipe section 113, and a fourth pipe section 114 in sequence. A first electronic expansion valve 101 is provided between the second pipe section 112 and the third pipe section 113. The hot water tank 13 is provided outside the first pipe section 111, the high-pressure side radiator 14 is provided outside the second pipe section 112, the cold water tank 15 is provided outside the third pipe section 113, and the low-pressure side radiator 16 is provided outside the fourth pipe section 114. The device 16 is arranged outside the fourth pipe section 114, and the cooling fan 17 supplies air to the high-pressure side radiator 14 and blows it to the low-pressure side radiator 16. The compressor 12 compresses the R744 refrigerant to make it high-pressure and high-temperature. The R744 refrigerant heats the water in the hot water tank 13 through heat exchange in the first pipe section 111, and the hot water pump 131 outputs the hot water from the hot water tank 13. The R744 refrigerant dissipates heat and drops to room temperature in the second pipe section 112, and is converted to low temperature and low pressure through the first electronic expansion valve 101. The R744 refrigerant heats and absorbs heat in the third pipe section 113 to cool the water in the cold water tank 15. A cold water pump 151 outputs the cold water from the cold water tank 15, and the R744 refrigerant returns to room temperature in the fourth pipe section 114 and returns to the compressor 12 for the next cycle.

[0014] The heat pump system 10 can achieve the purpose of simultaneous heating and cooling by controlling the opening of the first electronic expansion valve 101 and changing the speed of the compressor 12 and the air volume of the cooling fan 17, thereby fully utilizing the heat pump system 10. The cooling fan 17 blows air from the high-pressure side radiator 14 to the low-pressure side radiator 16, which can help the high-pressure side radiator 14 dissipate heat and allow the dissipated heat to be absorbed by the low-pressure side radiator 16, so that the low-temperature R744 refrigerant can obtain higher energy than the ambient temperature, thereby improving the overall circulation efficiency of the heat pump system 10.

[0015] In the present invention, the refrigerant is R744 refrigerant, which is a refrigerant composed of carbon dioxide and a portion of phenol. R744 refrigerant has an extremely low GWP value, can slow down the trend of global warming, and will not damage the ozone layer. Carbon dioxide is also a substance widely present in the atmosphere, has high safety, and has excellent thermodynamic properties, making the heat pump system 10 more efficient, more energy-efficient, and less expensive, making the heat pump system 10 more affordable and practical.

[0016] In the present invention, the first pipe section 111 cooperates with the hot water tank 13 to generate hot water for bathing, and the third pipe section 113 cooperates with the cold water tank 15 as an air conditioner, which has both heating and cooling effects, thereby reducing waste in the heat cycle, saving costs and being more environmentally friendly.

[0017] In the present invention, the refrigerant storage tank 18 is connected to the high-pressure side (first pipe section (111)) and the low-pressure side (fourth pipe section 114) of the pipeline 11 and is connected in parallel with the compressor 12, and a second electronic expansion valve 102 and a third electronic expansion valve 103 are respectively provided at the inlet and outlet of the refrigerant storage tank 18, which are used to adjust and replenish the refrigerant amount in the pipeline 11. Since the volume change of carbon dioxide is greatly affected by temperature, when the ambient temperature is low, it is displayed that the pressure in the pipeline 11 is insufficient. At this time, the refrigerant must be replenished into the pipeline 11 to increase the pressure on the low-pressure side. The third electronic expansion valve 103 can be used to partially adjust the volume of carbon dioxide. The refrigerant flows out of the refrigerant storage tank 18 and enters the pipeline 11 for circulation. On the contrary, if the ambient temperature is high, it is indicated that the pressure in the pipeline 11 is too high. At this time, the refrigerant must be allowed to leave the pipeline 11 to reduce the pressure on the high-pressure side. The second electronic expansion valve 102 can be used to allow part of the refrigerant to flow into the refrigerant storage tank 18 for storage; the refrigerant storage tank 18 is used in conjunction with the second electronic expansion valve 102 and the third electronic expansion valve 103 to adjust the relationship between the high-pressure side and the low-pressure side of the pipeline 11 without the need to accurately calculate the pipe volume of the pipeline 11 on the high-pressure side and the high-pressure side, thereby improving the design efficiency of the heat pump system 10.

[0018] In this embodiment, the high-pressure side radiator 14 and the low-pressure side radiator 16 are overlapped to form a cascade radiator. When the high-pressure and high-temperature refrigerant heats the water in the hot water tank 13, the refrigerant temperature rises accordingly. It dissipates heat and cools down through the high-pressure side radiator 14, and then it can reach the ability to cool the cold water tank 15 after expansion. The refrigerant leaves the cold water tank 15 as a low-temperature and low-pressure refrigerant and flows through the low-pressure side radiator 16. Therefore, the heat energy of the high-pressure side radiator 14 can be transferred to the low-pressure side radiator 16 through the cooling fan 17. The high-pressure side radiator 14 and the low-pressure side radiator 16 overlap and can effectively transfer heat energy between the high-pressure side radiator 14 and the low-pressure side radiator 16. The refrigerant can better return to room temperature in the fourth pipe section 114, and the refrigerant enters the compressor 12 again at a higher temperature, thereby improving the heating efficiency of the compressor 12 and improving the efficiency of the heat pump system 10. Therefore, the cascade radiator formed by the overlapping of the high-pressure side radiator 14 and the low-pressure side radiator 16 is also an energy recovery device, and saves the energy consumption of the cooling fan 17.

[0019] Compared with related technologies, the simultaneous heating and cooling carbon dioxide heat pump system provided by the present invention has the following beneficial effects: The present invention provides a carbon dioxide heat pump system that can simultaneously heat and cool. It has both heating and cooling effects, which reduces waste in the heat cycle, saves costs, and is more environmentally friendly. It uses R744 refrigerant, which has an extremely low GWP value, can slow down the trend of global warming, will not damage the ozone layer, is highly safe, and has excellent thermodynamic properties, making the heat pump system 10 more efficient, more energy-efficient, and less expensive. When the high-pressure side radiator 14 and the low-pressure side radiator 16 are arranged in an overlapping manner, the heat of the high-pressure side radiator 14 is transferred to the low-pressure side radiator 16 through the cooling fan 17, so that the refrigerant in the fourth pipe section 114 is heated and returned to the compressor 12, thereby improving the system circulation efficiency.

[0020] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention's description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A carbon dioxide heat pump system for simultaneous heating and cooling, characterized in that: include: A heat pump system, the heat pump system includes a pipeline, a compressor, a hot water tank, a high-pressure side radiator, a cold water tank, a low-pressure side radiator and a cooling fan, R744 refrigerant circulates in the pipeline, the pipeline includes a first pipe section, a second pipe section, a third pipe section and a fourth pipe section, the first pipe section, the second pipe section, the third pipe section and the fourth pipe section are connected end to end in sequence, the compressor is located between the first pipe section and the fourth pipe section, the hot water tank is arranged outside the first pipe section, the high-pressure side radiator is arranged outside the second pipe section, the cold water tank is arranged outside the third pipe section, the low-pressure side radiator is outside the fourth pipe section, the cooling fan is located on the side of the high-pressure side radiator away from the low-pressure side radiator, and a first electronic expansion valve is provided between the second pipe section and the third pipe section.

2. The simultaneous heating and cooling carbon dioxide heat pump system according to claim 1, characterized in that: It also includes a refrigerant storage tank, the outlet and inlet of which are respectively connected to the first pipe section and the fourth pipe section, and the outlet and inlet of the refrigerant storage tank are respectively provided with a second electronic expansion valve and a third electronic expansion valve.

3. The simultaneous heating and cooling carbon dioxide heat pump system according to claim 1 or 2, characterized in that: The high-pressure side radiator and the low-pressure side radiator are separately arranged.

4. The simultaneous heating and cooling carbon dioxide heat pump system according to claim 1 or 2, characterized in that: The high-pressure side radiator and the low-pressure side radiator are arranged to overlap.

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