Carbon dioxide heat pump with dual supply energy structure

Abstract

The utility model provides a kind of carbon dioxide heat pump with two combined energy structure belongs to heating ventilation air conditioning technical field;Including fan, middle bracing, fin and bottom frame assembly;Fan is installed in upper portion, middle bracing is installed in middle portion, fan is fixed with fin and bottom frame assembly by bolt through fan fixing plate.The carbon dioxide heat pump with two combined energy structure of the utility model can meet the demand of domestic hot water supply (hot water temperature 55~90 DEG C) and building heating (heating water temperature 35~65 DEG C) simultaneously, with the advantages of high energy comprehensive utilization efficiency, one machine multiple functions.Compared with the traditional single-function heat pump system has more extensive application scenarios.

Description

Technical Field

[0001] This utility model relates to a carbon dioxide heat pump with a dual-power supply structure, which can supply both domestic hot water and heating; it belongs to the field of heating, ventilation and air conditioning technology. Background Technology

[0002] A carbon dioxide heat pump is a heat pump device that absorbs heat energy from the air in the environment or waste heat from industrial exhaust through an evaporator, and transfers the energy to water to obtain hot water at a higher temperature.

[0003] A carbon dioxide heat pump is a heat pump or air conditioner that uses carbon dioxide as a refrigerant, while a regular heat pump generally uses Freon as a refrigerant. The working principles of the two are basically the same, both belonging to the vapor compression type, but there are slight differences. A carbon dioxide heat pump belongs to a supercritical cycle, that is, at the condenser end, carbon dioxide is not condensed into a liquid, while Freon refrigerant is condensed into a liquid at the condenser end and then throttled.

[0004] The working principle of a carbon dioxide heat pump is to absorb carbon dioxide from the air and release it into the water using a refrigerant. The compressor compresses the returning low-pressure refrigerant, turning it into a high-temperature, high-pressure gas, which is then discharged. This high-temperature, high-pressure refrigerant gas flows through copper pipes wrapped around the outside of the water tank, where heat is conducted to the tank. The cooled refrigerant, under continuous pressure, becomes liquid and enters the evaporator after passing through the expansion valve. Due to the sudden drop in pressure in the evaporator, the liquid refrigerant rapidly evaporates, becoming gaseous and absorbing a large amount of heat. Simultaneously, a large amount of air flows over the outer surface of the evaporator under the action of a fan, absorbing energy from the air and rapidly lowering its temperature, turning it into cool air that is then discharged into the space.

[0005] Most existing technologies are designed for a single working condition, and the equipment occupies a large space, is difficult to install and manufacture, and is complicated to operate.

[0006] Therefore, providing a carbon dioxide heat pump with a dual-power structure, in which the dual-power carbon dioxide heat pump uses a common compressor, evaporator, heat exchanger and other components, has a simple pipeline layout, low maintenance cost, small overall equipment footprint, and high equipment utilization rate, has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] The purpose of this utility model is to provide a carbon dioxide heat pump with a dual-power structure. The carbon dioxide dual-power heat pump uses a common compressor, evaporator, heat exchanger and other components. The pipeline layout is simple, the maintenance cost is low, the overall equipment occupies a small area, and the equipment utilization rate is relatively high.

[0008] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0009] A carbon dioxide heat pump with a dual-power supply structure is characterized by comprising a fan, a central support plate, fins, and a base frame assembly; the fan is installed at the top, the central support plate is installed in the middle, and the fan is fixed to the base frame assembly by bolts via a fan fixing plate and the fins.

[0010] Preferably, the bottom frame assembly includes a chassis, five three-way valves, two carbon dioxide solenoid valves, a carbon dioxide compressor, an oil separator, a second air cooler, a first air cooler, a subcooler, a safety valve, a high-pressure valve, a dryer filter, a throttle valve, a defrost solenoid valve, a carbon dioxide vapor-liquid separator, a buffer tank, a compressor, an oil separator, a condenser, a high-pressure liquid receiver, a carbon dioxide throttle valve, and a vapor-liquid separator. The exhaust port of the carbon dioxide compressor is connected to the oil separator via a pipe. The oil separator is connected to the first three-way valve via a pipe. The main circuit of the first three-way valve is connected to the second air cooler via a second three-way valve. The second air cooler is connected to the third three-way valve and the second carbon dioxide solenoid valve via pipes. The main circuit of the third three-way valve is connected to the first air cooler, the subcooler, and the fourth three-way valve via pipes. The branches of the second, third, and fourth three-way valves are interconnected via pipes. The fourth three-way valve is connected to the safety valve, the high-pressure valve, and the dryer filter via pipes. The dryer filter is connected to the buffer tank, the first carbon dioxide solenoid valve, the throttle valve, and the fifth three-way valve via pipes. The first three-way valve is connected to the second three-way valve via copper pipes. A branch of the first three-way valve is connected to the defrost solenoid valve and a branch of the fifth three-way valve. The main branch of the fifth three-way valve is connected to the finned heat exchanger and the carbon dioxide vapor-liquid separator via pipes. The carbon dioxide vapor-liquid separator is connected to the return port of the carbon dioxide compressor via pipes. The carbon dioxide compressor, oil separator, second air cooler, first air cooler, subcooler, dryer filter, and buffer tank are all bolted to the chassis. The finned heat exchanger is fixed to the central support plate, which is bolted to the chassis. The compressor's exhaust port is connected to the oil separator via a pipe. The oil separator is connected to the condenser, high-pressure liquid receiver, and dryer filter via pipes. The dryer filter outlet is connected to the solenoid valve via a pipe. The solenoid valve outlet is connected to the throttle valve, subcooler, and vapor-liquid separator via pipes. The vapor-liquid separator outlet is connected to the compressor's return port via a pipe. The compressor, oil separator, condenser, high-pressure liquid receiver, dryer filter, subcooler, and vapor-liquid separator are all bolted to the chassis.

[0011] Preferably, the water outlet of the condenser is connected to the water inlet of the first air cooler through a pipe. The heating return water of the unit is heated twice by the condenser and the first air cooler before flowing out of the unit, and the hot water return water is heated by the second air cooler before flowing out of the unit.

[0012] Preferably, there are two fans.

[0013] Preferably, the compressor is an R134A compressor.

[0014] Preferably, the oil separator is an R134A oil separator.

[0015] Preferably, the solenoid valve is an R134A solenoid valve.

[0016] Preferably, the vapor-liquid separator is an R134A vapor-liquid separator.

[0017] The advantages of this utility model are:

[0018] This utility model discloses a dual-purpose carbon dioxide heat pump with a dual-power supply structure. The dual-power carbon dioxide heat pump shares components such as a compressor, evaporator, and heat exchanger, resulting in simple piping layout, low maintenance costs, a small overall footprint, and high equipment utilization. It can simultaneously meet the needs of domestic hot water supply (hot water temperature 55℃~90℃) and building heating (heating water temperature 35℃~65℃), possessing the advantages of high energy efficiency and multi-functionality. Compared to traditional single-function heat pump systems, this utility model's carbon dioxide heat pump has a wider range of applications.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this does not imply any limitation on the scope of protection of the present invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a carbon dioxide heat pump with a dual-power supply structure according to Embodiment 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of the bottom frame assembly of the carbon dioxide heat pump with a dual-power supply structure in Embodiment 1 of this utility model.

[0022] Main component names:

[0023] I. Fan II. Support Plate

[0024] III. Fins IV. Base Frame Assembly

[0025] 1 Chassis 2-1 First Three-Way Valve

[0026] 2-2 Second three-way valve 2-3 Third three-way valve

[0027] 2-4 Fourth three-way valve 2-5 Fifth three-way valve

[0028] 3-1 First CO2 solenoid valve; 3-2 Second CO2 solenoid valve

[0029] 4 CO2 compressors

[0030] 5. Oil separator; 6. Second air cooler

[0031] 7 First air cooler 8 Subcooler

[0032] 9 Safety valve 10 High pressure valve

[0033] 11. Dryer filter 12. Throttle valve

[0034] 13 Defrosting solenoid valve 14 Carbon dioxide vapor-liquid separator

[0035] 15 Buffer Tank 16R134A Compressor

[0036] 17R134A oil separator 18 condenser

[0037] 19 High-pressure liquid receiver 20R134A solenoid valve

[0038] 21 Carbon dioxide throttle valve 22 R134A vapor-liquid separator Detailed Implementation

[0039] Unless otherwise specified, the components used in the following embodiments are all conventional components available on the market in this field, their connections are all conventional connections, the software or programs used are conventional software or programs, or improvements based on conventional software or programs, and the detection methods are conventional detection methods or improvements based on conventional detection methods; the improvement of this utility model lies in the hardware.

[0040] Example 1

[0041] like Figure 1 The diagram shown is a schematic representation of the carbon dioxide heat pump with a dual-power supply structure according to Embodiment 1 of this utility model; Figure 2 The diagram shows the structural schematic of the bottom frame assembly of a carbon dioxide heat pump with a dual-power supply structure according to Embodiment 1 of this utility model; wherein, Ⅰ is the fan, Ⅱ is the middle support plate, Ⅲ is the fins, Ⅳ is the bottom frame assembly, 1 is the chassis, 2-1 is the first three-way valve, 2-2 is the second three-way valve, 2-3 is the third three-way valve, 2-4 is the fourth three-way valve, 2-5 is the fifth three-way valve, 3-1 is the first carbon dioxide solenoid valve, 3-2 is the second carbon dioxide solenoid valve, 4 is the carbon dioxide compressor, and 5 is... 6 is an oil separator, 7 is a second air cooler, 8 is a first air cooler, 9 is a subcooler, 10 is a safety valve, 11 is a high-pressure valve, 12 is a dryer filter, 13 is a throttle valve, 14 is a defrost solenoid valve, 15 is a carbon dioxide vapor-liquid separator, 16 is a buffer tank, 17 is an R134A compressor, 18 is an R134A oil separator, 19 is a condenser, 20 is a high-pressure liquid receiver, 20 is an R134A solenoid valve, 21 is a carbon dioxide throttle valve, and 22 is an R134A vapor-liquid separator.

[0042] The carbon dioxide heat pump with a dual-power supply structure in Embodiment 1 of this utility model includes: a fan I, a middle support plate II, fins III, and a bottom frame assembly IV; there are two fans I installed on the upper part, the middle support plate II is installed in the middle, and the fans I are fixed to the bottom frame assembly IV by bolts through the fan fixing plate and the fins III;

[0043] The bottom frame assembly IV includes a chassis 1, a three-way valve, a carbon dioxide solenoid valve 3, a carbon dioxide compressor 4, an oil separator 5, a second air cooler 6, a first air cooler 7, a subcooler 8, a safety valve 9, a high-pressure valve 10, a dryer filter 11, a throttle valve 12, a defrost solenoid valve 13, a carbon dioxide vapor-liquid separator 14, a buffer tank 15, an R134A compressor 16, an R134A oil separator 17, a condenser 18, a high-pressure liquid receiver 19, an R134A solenoid valve 20, a carbon dioxide throttle valve 21, and an R134A vapor-liquid separator 22.

[0044] Carbon dioxide cycle: The exhaust port of carbon dioxide compressor 4 is connected to oil separator 5 via a pipe. Oil separator 5 is connected to first three-way valve 2-1 via a pipe. The main circuit of first three-way valve 2-1 is connected to second air cooler 6 via second three-way valve 2-2. Second air cooler 6 is connected to third three-way valve 2-3 and second carbon dioxide solenoid valve 3-2 via a pipe. The main circuit of third three-way valve 2-3 is connected to first air cooler 7, subcooler 8 and fourth three-way valve 2-4 via pipes. Branch circuits of second three-way valve 2-2, third three-way valve 2-3 and fourth three-way valve 2-4 are interconnected via pipes. Fourth three-way valve 2-4 is connected to safety valve 9, high-pressure valve 10 and dryer filter 11 via pipes. Dryer filter 11 is connected to... The buffer tank 15, the first carbon dioxide solenoid valve 3-1, the throttle valve 12 and the fifth three-way valve 2-5 are connected respectively. The branch of the first three-way valve 2-1 is connected to the defrost solenoid valve 13 and the branch of the fifth three-way valve 2-5 through copper pipes. The main line of the fifth three-way valve 2-5 is connected to the finned heat exchanger III and the carbon dioxide vapor-liquid separator 14 through pipes. The carbon dioxide vapor-liquid separator 14 is connected to the return port of the carbon dioxide compressor 4 through pipes. The carbon dioxide compressor 4, the oil separator 5, the second air cooler 6, the first air cooler 7, the subcooler 8, the dryer filter 11 and the buffer tank 15 are fixed to the chassis 1 with bolts. The finned heat exchanger III is fixed to the middle support plate II. The middle support plate II is fixed to the column connected to the chassis 1 with bolts.

[0045] R134a Cycle: The discharge port of R134A compressor 16 is connected to oil separator 17 via a pipe. Oil separator 17 is connected to condenser 18, high-pressure liquid receiver 19, and dryer filter 11 via pipes. The outlet of dryer filter 11 is connected to R134A solenoid valve 20 via a pipe. The outlet of R134A solenoid valve 20 is connected to throttle valve 21, subcooler 8, and R134A vapor-liquid separator 22 via pipes. The outlet of R134A vapor-liquid separator 22 is connected to the return port of R134A compressor 16 via a pipe. R134A compressor 16, oil separator 17, condenser 18, high-pressure liquid receiver 19, dryer filter 11, subcooler 8, and R134A vapor-liquid separator 22 are all bolted to chassis 1.

[0046] Fan I is fixed to fin III and base frame assembly IV by bolts via fan mounting plate. The water outlet of condenser 18 is connected to the water inlet of first air cooler 7 via pipe. The heating return water of the unit flows out of the unit after being heated twice by condenser 18 and first air cooler 7. The hot water return water flows out of the unit after being heated by second air cooler 6.

[0047] The working principle of the carbon dioxide heat pump with a dual-power supply structure in Embodiment 1 of this utility model is as follows:

[0048] In the heating + hot water supply mode: the refrigerant from the outlet of the carbon dioxide compressor 4 flows sequentially through the second air cooler 6 and the first air cooler 7. The fluids from the outlets of the second air cooler 6 and the first air cooler 7 are subcooled by the auxiliary circulation, and then pass through the safety valve 9, the high pressure valve 10, the dryer filter 11, the buffer tank 15, the first carbon dioxide solenoid valve 3-1 and the throttle valve 12, and finally enter the fins III to evaporate, completing a thermodynamic cycle.

[0049] In addition, in order to ensure that the water quality requirements under the hot water supply mode are met, the present invention adopts an independent pipeline configuration so that the heating medium and the hot water return water do not share the same pipeline: the heating return water of the unit flows out of the unit after being heated twice by the condenser 18 and the first air cooler 7, and the hot water return water flows out of the unit after being heated by the second air cooler 6.

[0050] In heating mode, the second air cooler 6 does not work. The return water is first heated by passing through the condenser 18. Then, the medium-temperature hot water from the condenser 8 enters the first air cooler 7 and is heated again. After that, the water flows out from the first air cooler 7 for heating.

[0051] In hot water supply mode, the fluid at the outlet of the first air cooler 7 does not need to be subcooled by the subcooler. Therefore, the R134a subcooling cycle does not work at this time, and the tap water directly enters the second air cooler 6 to be heated. The heated hot water is used for domestic hot water.

[0052] The carbon dioxide heat pump with a dual-power supply structure in Embodiment 1 of this utility model has the following advantages:

[0053] 1. The air cooler, subcooler, and compressor are shared, making it a dual-purpose unit that can supply both heating and hot water. The equipment piping layout is simple and easy to process.

[0054] 2. The carbon dioxide compressor and the R134A compressor are arranged diagonally for easy wiring and maintenance. The inlet and outlet of the air cooler and the subcooler are arranged in the same direction to facilitate the installation and use of the whole unit.

[0055] This utility model discloses a carbon dioxide heat pump with a dual-power supply structure, which can simultaneously meet the needs of domestic hot water supply (hot water temperature 55℃~90℃) and building heating (heating water temperature 35℃~65℃), and has the advantages of high energy utilization efficiency and multi-functionality. Compared with traditional single-function heat pump systems, it has a wider range of application scenarios.

[0056] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the present utility model patent and the contents of the specification should still fall within the scope of the present utility model.

Claims

1. A carbon dioxide heat pump with a dual-power supply structure, characterized in that: It includes a fan, a central support plate, fins, and a base frame assembly; the fan is installed at the top, the central support plate is installed in the middle, and the fan is fixed to the base frame assembly by bolts via a fan fixing plate and fins.

2. The carbon dioxide heat pump with a dual-power supply structure as described in claim 1, characterized in that, The base frame assembly includes a chassis, five three-way valves, two carbon dioxide solenoid valves, a carbon dioxide compressor, an oil separator, a second air cooler, a first air cooler, a subcooler, a safety valve, a high-pressure valve, a dryer filter, a throttle valve, a defrost solenoid valve, a carbon dioxide vapor-liquid separator, a buffer tank, a compressor, an oil separator, a condenser, a high-pressure liquid receiver, a carbon dioxide throttle valve, and a vapor-liquid separator. The exhaust port of the carbon dioxide compressor is connected to the oil separator via a pipe. The oil separator is connected to the first three-way valve via a pipe. The main circuit of the first three-way valve is connected to the second air cooler via the second three-way valve. The second air cooler is connected to the third three-way valve and the second carbon dioxide solenoid valve via pipes. The main circuit of the third three-way valve is connected to the first air cooler, the subcooler, and the fourth three-way valve via pipes. The branches of the second, third, and fourth three-way valves are interconnected via pipes. The fourth three-way valve is connected to the safety valve, the high-pressure valve, and the dryer filter via pipes. The dryer filter is connected to the buffer tank, the first carbon dioxide solenoid valve, the throttle valve, and the fifth three-way valve via pipes. The first three-way valve's branch is connected to the defrost solenoid valve and the fifth three-way valve's branch via copper pipes. The fifth three-way valve's main branch is connected to the finned heat exchanger and the carbon dioxide vapor-liquid separator via pipes. The carbon dioxide vapor-liquid separator is connected to the carbon dioxide compressor's return port via pipes. The carbon dioxide compressor, oil separator, second air cooler, first air cooler, subcooler, dryer filter, and buffer tank are all fixed to the chassis with bolts. The finned heat exchanger is fixed to the central support plate, which is also fixed to the chassis with bolts. The compressor's exhaust port is connected to the oil separator via a pipe. The oil separator is connected to the condenser, high-pressure liquid receiver, and dryer filter via pipes. The dryer filter outlet is connected to the solenoid valve via a pipe. The solenoid valve outlet is connected to the throttle valve, subcooler, and vapor-liquid separator via pipes. The vapor-liquid separator outlet is connected to the compressor's return port via a pipe. The compressor, oil separator, condenser, high-pressure liquid receiver, dryer filter, subcooler, and vapor-liquid separator are all bolted to the chassis.

3. The carbon dioxide heat pump with a dual-power supply structure as described in claim 2, characterized in that, The water outlet of the condenser is connected to the water inlet of the first air cooler through a pipe. The heating return water of the unit is heated twice by the condenser and the first air cooler before flowing out of the unit, and the hot water return water is heated by the second air cooler before flowing out of the unit.

4. The carbon dioxide heat pump with a dual-power supply structure as described in claim 3, characterized in that, There are two fans.

5. The carbon dioxide heat pump with a dual-power supply structure as described in claim 4, characterized in that, The compressor is an R134A compressor.

6. The carbon dioxide heat pump with a dual-power supply structure as described in claim 5, characterized in that, The oil separator is an R134A oil separator.

7. The carbon dioxide heat pump with a dual-power supply structure as described in claim 6, characterized in that, The solenoid valve is an R134A solenoid valve.

8. The carbon dioxide heat pump with a dual-power supply structure as described in claim 7, characterized in that, The vapor-liquid separator is an R134A vapor-liquid separator.

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