Two-stage compressed air source heat pump device
By adopting a dual-stage compressed air source heat pump device and a dual-stage scroll compression technology in the air source heat pump, the problem of poor heating effect in high-cold environments is solved, and efficient heating in extremely low temperature environments is achieved, reducing costs and pollution.
Patent Information
- Application Number
- CN202422159373.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-09-02
AI Technical Summary
The existing air source heat pump cannot extract heat normally in high-cold ultra-low temperature environments, resulting in poor heating effect and unable to provide a comfortable heating experience.
A dual-stage compressed air source heat pump device is adopted, including two refrigerant circulation systems, and a shell and tube heat exchanger is shared. The two compression chambers allow the low-pressure refrigerant steam to pass through double compression, increasing the circulation and compression ratio of the refrigerant and reducing the evaporation temperature.
High-temperature hot water at 65℃ can be generated in an environment of -40℃, which significantly increases the heating capacity, reduces heating costs, and reduces environmental pollution.
Smart Images
Figure CN222964163U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of refrigeration and heat, in particular to a two-stage compression air source heat pump device. Background Art
[0002] The traditional heating method in the north mainly uses coal, with too high carbon emissions. The working principle of an air source heat pump is to convert the heat energy stored in the air into indoor heat through the work of a compressor. It is a stable and reliable clean energy heating method that can significantly reduce the use of fossil fuels such as coal, achieving energy conservation and emission reduction. However, in cold regions such as Northeast and Northwest China, the winter temperature is often below -30°C. Ordinary air source heat pumps cannot extract heat normally in cold and ultra-low temperature environments due to ordinary air compression technology, resulting in poor heating effects and an uncomfortable experience for people. Content of the Utility Model
[0003] The main purpose of the utility model is to provide a two-stage compression air source heat pump device, aiming to solve the existing technical problems.
[0004] To achieve the above purpose, the utility model provides a two-stage compression air source heat pump device, which includes two refrigerant circulation systems. The two refrigerant circulation systems share a shell-and-tube heat exchanger. The refrigerant circulation system includes a four-way valve. The first valve port of the four-way valve is connected to the shell-and-tube heat exchanger, the second valve port is connected to a gas-liquid separator, the third valve port is connected to a fin heat exchanger, the fourth valve port is connected to an oil separator. The gas-liquid separator is connected to a compressor. One path of the compressor is connected to the oil separator, and the other path is connected to an economizer. The economizer is connected to a check valve. One path of the check valve is connected to the fin heat exchanger, and the other path is connected to a liquid receiver. The liquid receiver is connected to the shell-and-tube heat exchanger.
[0005] Further, the compressor has two compression chambers, and low-pressure refrigerant vapor is discharged after double compression.
[0006] Further, an electronic expansion valve and a throttling electronic expansion valve are respectively provided on the connecting pipeline between the economizer and the check valve.
[0007] Further, a low-pressure switch and a high-pressure switch are respectively provided on the inlet and outlet pipelines of the compressor.
[0008] The beneficial effects of the utility model are reflected in:
[0009] In the utility model, the two-stage scroll compression technology is used. The two compression chambers enable low-pressure refrigerant vapor to be discharged after double compression, increasing the refrigerant circulation; the compression ratio is larger, the evaporation temperature can be made lower, the application range is wider, and the exhaust temperature is lower than that of an ordinary single-stage compressor;
[0010] This device has a total of two refrigerant circulation systems that share a single water system, doubling the heating capacity of the unit.
[0011] Compared with ordinary air-source heat pumps, this device can produce high-temperature hot water at 65°C in an environment of -40°C. It supplies heat to radiators and floor heating through a closed pipeline. Compared with traditional coal-fired heating, it greatly reduces the heating cost and does not pollute the environment at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic structural diagram of the dual-stage compression air-source heat pump device of the present invention.
[0013] DESCRIPTION OF THE REFERENCE NUMERALS:
[0014] 1. Shell-and-tube heat exchanger; 2. Compressor; 3. Liquid receiver; 4. Gas-liquid separator; 5. Check valve; 6. Economizer; 7. Finned heat exchanger; 8. Four-way valve; 9. Oil separator; 10. Low-pressure switch; 11. High-pressure switch; 12. Electronic expansion valve; 13. Throttle electronic expansion valve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0016] Please refer to Figure 1 , the present invention provides a dual-stage compression air-source heat pump device, which includes two refrigerant circulation systems. The two refrigerant circulation systems share a shell-and-tube heat exchanger 1. The refrigerant circulation system includes a four-way valve 8. The first valve port of the four-way valve 8 is connected to the shell-and-tube heat exchanger 1, the second valve port is connected to the gas-liquid separator 4, the third valve port is connected to the finned heat exchanger 7, the fourth valve port is connected to the oil separator 9. The gas-liquid separator 4 is connected to the compressor 2. One path of the compressor 2 is connected to the oil separator 9, and the other path is connected to the economizer 6. The economizer 6 is connected to the check valve 5. One path of the check valve 5 is connected to the finned heat exchanger 7, and the other path is connected to the liquid receiver 3. The liquid receiver 3 is connected to the shell-and-tube heat exchanger 1.
[0017] Using the dual-stage scroll compression technology, two compression chambers enable the low-pressure refrigerant vapor to be discharged after double compression, increasing the refrigerant circulation; the compression ratio is larger, the evaporation temperature can be made lower, the application range is wider, and the exhaust temperature is lower than that of ordinary single-stage compressors;
[0018] This device has a total of two refrigerant circulation systems, sharing a single water system, which doubles the heating capacity of the unit.
[0019] Compared with ordinary air-source heat pumps, this device can produce high-temperature hot water at 65°C in an environment of -40°C. It supplies heat to radiators and floor heating through a closed pipeline. Compared with traditional coal-burning, it greatly reduces the heating cost and does not pollute the environment at the same time.
[0020] Specifically, the compressor 2 has two compression chambers, and the low-pressure refrigerant vapor is discharged after double compression.
[0021] Specifically, an electronic expansion valve 12 and a throttling electronic expansion valve 13 are respectively provided on the connecting pipeline between the economizer 6 and the check valve 5.
[0022] Specifically, a low-pressure switch 10 and a high-pressure switch 11 are respectively provided on the inlet and outlet pipelines of the compressor 1.
[0023] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present invention, these directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the drawings. If this specific posture changes, the directional indications will also change accordingly.
[0024] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present invention, these "first", "second", etc. descriptions are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, "a plurality" means more than two. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist.
[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A two-stage compressed air source heat pump device, characterized in that: The invention comprises two refrigerant circulation systems, wherein the two refrigerant circulation systems share a shell and tube heat exchanger (1), wherein the refrigerant circulation system comprises a four-way valve (8), wherein a first valve port of the four-way valve (8) is connected to the shell and tube heat exchanger (1), a second valve port is connected to a gas-liquid separator (4), a third valve port is connected to a fin heat exchanger (7), and a fourth valve port is connected to an oil separator (9), wherein the gas-liquid separator (4) is connected to a compressor (2), wherein one path of the compressor (2) is connected to the oil separator (9) and another path is connected to an economizer (6), wherein the economizer (6) is connected to a one-way valve (5), wherein one path of the one-way valve (5) is connected to the fin heat exchanger (7) and another path is connected to a liquid reservoir (3), wherein the liquid reservoir (3) is connected to the shell and tube heat exchanger (1).
2. A two-stage compressed air source heat pump device as claimed in claim 1, characterized in that: The compressor (2) has two compression chambers, and the low-pressure refrigerant vapor is discharged after being double compressed.
3. A two-stage compressed air source heat pump device as claimed in claim 1, characterized in that: An electronic expansion valve (12) and a throttling electronic expansion valve (13) are respectively provided on the connecting pipeline between the economizer (6) and the one-way valve (5).
4. A two-stage compressed air source heat pump device as claimed in claim 1, characterized in that: A low-pressure switch (10) and a high-pressure switch (11) are respectively provided on the inlet and outlet pipelines of the compressor (2).