CN218154890U - Cascade heat pump system - Google Patents
Cascade heat pump system Download PDFInfo
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- CN218154890U CN218154890U CN202221988276.1U CN202221988276U CN218154890U CN 218154890 U CN218154890 U CN 218154890U CN 202221988276 U CN202221988276 U CN 202221988276U CN 218154890 U CN218154890 U CN 218154890U
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Abstract
The utility model relates to a cascade heat pump technical field specifically provides a cascade heat pump system, aims at solving current cascade heat pump system and has the problem of higher standby power consumption. For this, the utility model discloses an overlapping formula heat pump system includes high pressure refrigerant circulation circuit, low pressure refrigerant circulation circuit, heat transfer water route and preheats the water route, and the partly in heat transfer water route sets up in first heat exchanger, preheats the water route and links to each other with the heat transfer water route, is provided with electric heater unit and solar energy power generation heating device on preheating the water route, and electric heater unit and solar energy power generation heating device set to can the selectivity preheat the water in the water route, preheats the water after preheating in the water route and gets into in the first heat exchanger. The utility model discloses make full use of solar energy, when solar illumination is sufficient, through solar energy power generation heating device with solar energy transformation for the electric energy, and then preheat the water in the preheating water route, reduce the use of electric energy, and then effectively reduce overlapping formula heat pump system's standby power consumption.
Description
Technical Field
The utility model relates to an overlapping formula heat pump technical field specifically provides an overlapping formula heat pump system.
Background
The cascade heat pump system generally comprises a high-pressure refrigerant circulation loop and a low-pressure refrigerant circulation loop, wherein the high-pressure refrigerant circulation loop and the low-pressure refrigerant circulation loop exchange heat through a shared intermediate heat exchanger to achieve the purpose of providing high-temperature hot water. However, the conventional cascade heat pump system is easy to stop in a low-temperature environment, and in order to prevent the compressor from being worn due to oil shortage due to low oil temperature when the compressor is restarted, the cascade heat pump system needs to continuously energize the heating belt of the compressor, which increases standby power consumption of the cascade heat pump system.
Accordingly, there is a need in the art for a new cascade heat pump system that solves the above-mentioned problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving above-mentioned technical problem, promptly, solve current overlapping formula heat pump system and have the problem of higher standby power consumption.
The utility model provides an overlapping formula heat pump system, overlapping formula heat pump system includes high pressure refrigerant circulation circuit, low pressure refrigerant circulation circuit, heat transfer water route and preheats the water route, be provided with first compressor, first heat exchanger, first throttle component and intermediate heat exchanger on the high pressure refrigerant circulation circuit, be provided with the second compressor on the low pressure refrigerant circulation circuit intermediate heat exchanger, second throttle component and second heat exchanger, high pressure refrigerant circulation circuit with low pressure refrigerant circulation circuit passes through intermediate heat exchanger carries out the heat transfer, partly set up in the heat transfer water route in the first heat exchanger, preheat the water route with the heat transfer water route links to each other, it is provided with electric heating device and solar energy power generation heating device on the water route to preheat, electric heating device with solar energy power generation heating device sets up to can the selectivity right preheat the water in the water route, preheat the water entering after preheating in the water route in the first heat exchanger.
In a preferred technical solution of the above-mentioned cascade heat pump system, a three-way valve is disposed on the preheated water path, the three-way valve includes an inlet and two outlets, the inlet of the three-way valve is connected to the electric heating device, a first outlet of the three-way valve is connected to the solar power generation heating device, and a second outlet of the three-way valve is connected to the heat exchange water path.
In a preferred technical solution of the cascade heat pump system, the cascade heat pump system further includes a refrigerant circulation branch, a first end of the refrigerant circulation branch is connected between the second throttling member and the second heat exchanger, and a second end of the refrigerant circulation branch is connected between the second compressor and the intermediate heat exchanger.
In a preferred embodiment of the cascade heat pump system, a control valve is disposed on the refrigerant circulation branch, and the control valve is configured to control an on/off state of the refrigerant circulation branch.
In a preferred technical solution of the above cascade heat pump system, a first heater is further disposed on the low-pressure refrigerant circulation loop, and the first heater is disposed between the second heat exchanger and the second compressor.
In a preferred technical solution of the above-mentioned cascade heat pump system, the cascade heat pump system further includes a water pan, and the water pan is disposed near the second heat exchanger.
In a preferred embodiment of the above-mentioned cascade heat pump system, the cascade heat pump system further comprises a second heater, and the second heater is disposed in the water pan.
In a preferred embodiment of the cascade heat pump system, the high-pressure refrigerant circulation loop is further provided with a first gas-liquid separation member, and the first gas-liquid separation member is disposed at an air inlet of the first compressor.
In a preferred embodiment of the cascade heat pump system, the low-pressure refrigerant circulation loop is further provided with a second gas-liquid separation member, and the second gas-liquid separation member is disposed at an air inlet of the second compressor.
In a preferred technical solution of the cascade heat pump system, the intermediate heat exchanger is a plate heat exchanger.
Under the condition that adopts above-mentioned technical scheme, the utility model discloses an overlapping formula heat pump system includes high-pressure refrigerant circulation circuit, low pressure refrigerant circulation circuit, heat transfer water route and preheating water route, be provided with first compressor on the high-pressure refrigerant circulation circuit, first heat exchanger, first throttle component and intermediate heat exchanger, be provided with the second compressor on the low pressure refrigerant circulation circuit, intermediate heat exchanger, second throttle component and second heat exchanger, high-pressure refrigerant circulation circuit and low pressure refrigerant circulation circuit carry out the heat transfer through intermediate heat exchanger, partly setting in first heat exchanger in heat transfer water route, preheat the water route and link to each other with the heat transfer water route, be provided with electric heating device and solar energy power generation heating device on the preheating water route, electric heating device and solar energy power generation heating device set to can the selectivity preheat the water in preheating the water route, preheat the water after preheating in the water route and get into in the first heat exchanger. Based on the structure setting, the utility model discloses can make full use of solar energy, when solar illumination is sufficient, turn into the electric energy with solar energy through solar energy power generation heating device, and then preheat the water in the water route, reduce the use of electric energy, and then effectively reduce overlapping formula heat pump system's standby power consumption.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a cascade heat pump system according to the present invention;
reference numerals:
1. a high pressure refrigerant circulation loop; 11. a first compressor; 12. a first heat exchanger; 13. a first throttle member; 14. an intermediate heat exchanger;
2. a low pressure refrigerant circulation loop; 21. a second compressor; 22. a second throttling member; 23. a second heat exchanger; 24. a first heater; 25. a water pan; 26. a second heater;
3. a heat exchange waterway;
4. a preheating water path; 41. an electrical heating device; 42. a solar power generation heating device; 43. a three-way valve;
5. a connecting circuit; 51. a power grid; 52. a steering switch;
6. a refrigerant circulation branch; 61. and (4) controlling the valve.
Detailed Description
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications. For example, the utility model discloses in overlapping formula heat pump system can be domestic overlapping formula heat pump system, also can be industrial overlapping formula heat pump system, and this is not all restrictive, and the skilled person in the art can be according to the actual use demand self-setting the utility model discloses an overlapping formula heat pump system's application occasion. The changes related to the application do not deviate from the basic principle of the utility model, and belong to the protection scope of the utility model.
It should be noted that, unless otherwise explicitly stated or limited, the terms "connected" and "connected" in the description of the preferred embodiments should be interpreted broadly, and may be, for example, mechanically, electrically, directly, indirectly through an intermediary agent, or internally. In addition, the terms "first" and "second" are used for descriptive purposes only, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a cascade heat pump system according to the present invention. As shown in fig. 1, the utility model discloses a cascade heat pump system includes high pressure refrigerant circulation circuit 1, low pressure refrigerant circulation circuit 2, heat transfer water route 3 and preheats water route 4, is provided with first compressor 11 on the high pressure refrigerant circulation circuit 1, first heat exchanger 12, first throttle component 13 and intermediate heat exchanger 14, is provided with second compressor 21 on the low pressure refrigerant circulation circuit 2, intermediate heat exchanger 14, second throttle component 22 and second heat exchanger 23, and high pressure refrigerant circulation circuit 1 and low pressure refrigerant circulation circuit 2 carry out the heat transfer through intermediate heat exchanger 14.
It should be noted that the present invention does not limit the specific types of the refrigerant flowing in the high-pressure refrigerant circulation circuit 1 and the low-pressure refrigerant circulation circuit 2 and the heat exchange source of the second heat exchanger 23, and those skilled in the art can set the heat exchange source according to actual conditions. In a specific embodiment, the refrigerant in the high-pressure refrigerant circuit 1 is the refrigerant R134a, and the refrigerant in the low-pressure refrigerant circuit 2 is the refrigerant R410A. The heat exchange source of the second heat exchanger 23 is an air source, so that the energy consumption of the cascade heat pump system is further reduced, and the operation energy efficiency is improved.
In addition, it should be noted that the present invention does not limit the specific structures of the first compressor 11 and the second compressor 21, the first heat exchanger 12 and the second heat exchanger 23, the first throttling member 13 and the second throttling member 22, and the intermediate heat exchanger 14, and those skilled in the art can set the structures according to actual situations.
As a preferred embodiment, the first compressor 11 and the second compressor 21 are frequency conversion compressors, so that the operation state of the cascade heat pump system can be automatically changed according to actual conditions, and the operation energy consumption is effectively reduced; the first throttling component 13 and the second throttling component 22 are one of electronic expansion valves, capillary tubes, thermal expansion valves and other throttling components; the intermediate heat exchanger 14 is preferably a plate heat exchanger to effectively improve the heat exchange efficiency of the cascade heat pump system.
Furthermore, a part of the heat exchange water path 3 is disposed in the first heat exchanger 12, so that the water in the heat exchange water path 3 and the refrigerant in the high-pressure refrigerant circulation loop 1 exchange heat in the first heat exchanger 12, thereby achieving the purpose of producing hot water. The preheating water path 4 is connected with the heat exchange water path 3, the electric heating device 41 and the solar power generation heating device 42 are arranged on the preheating water path 4, the electric heating device 41 and the solar power generation heating device 42 can be arranged to selectively preheat water in the preheating water path 4, as shown in fig. 1, preheated water in the preheating water path 4 enters the first heat exchanger 12, solar energy is fully utilized, and power consumption is further effectively reduced.
It should be noted that, the present invention does not limit the specific structure of the electric heating device 41 and the solar power generation heating device 42, and those skilled in the art can set the specific structure according to actual conditions, as long as the electric heating device 41 can electrically heat the water in the preheating water path 4, and the solar power generation heating device 42 can heat the water in the preheating water path 4 after converting the solar energy into the electric energy.
Preferably, in the present embodiment, a three-way valve 43 is disposed on the preheating water path 4, the three-way valve 43 includes an inlet and two outlets, the inlet (a in fig. 1) of the three-way valve 43 is connected to the electric heating device 41, a first outlet (b in fig. 1) of the three-way valve 43 is connected to the solar power generation heating device 42, a second outlet (c in fig. 1) of the three-way valve 43 is connected to the heat exchange water path 3, and specifically, a second outlet of the three-way valve 43 is connected to a connection point of the heat exchange water path 3 and the preheating water path 4; of course, the specific structure of the three-way valve 43 is not limited and can be set by those skilled in the art.
When the sunlight is sufficient, the inlet of the three-way valve 43 is connected with the first outlet, at the moment, the solar power generation heating device 42 is electrically connected with the power grid 51 through the steering switch 52, and the preheating water channel 4 preheats the water in the solar power generation heating device 42 so as to effectively reduce the power consumption; in addition, when the illumination intensity is enough to preheat the water in the preheating water circuit 4 and can convert the excess electric energy, the converted excess electric energy can be incorporated into the power grid 51 through the connection circuit 5, so as to further reduce the power consumption of the cascade heat pump system.
When the solar light is insufficient, the inlet of the three-way valve 43 is connected to the second outlet, at this time, the electrical heating device 41 is electrically connected to the power grid 51 through the steering switch 52, the preheating water path 4 preheats the water inside the electrical heating device 41 through the electrical heating device 41, and the electric energy used by the electrical heating device 41 may be the electric energy stored in the power grid 51 by the solar power generation heating device 42, or the electric energy obtained by the power grid 51 from other channels, such as a wind power generation channel, a coal power generation channel, and the like.
Further, the cascade heat pump system further includes a refrigerant circulation branch 6, a first end of the refrigerant circulation branch 6 is connected between the second throttling component 22 and the second heat exchanger 23, and a second end of the refrigerant circulation branch 6 is connected between the second compressor 21 and the intermediate heat exchanger 14. The refrigerant circulation branch 6 is provided with a control valve 61, and the control valve 61 is provided to control the on/off state of the refrigerant circulation branch 6. Part of the refrigerant discharged from the second compressor 21 directly enters the second heat exchanger 23 through the refrigerant circulation branch 6 to prevent the second heat exchanger 23 from frosting or freezing, and further, the normal operation of the cascade heat pump system can be effectively ensured.
It should be noted that, the utility model discloses do not make any restriction to specific type and the concrete structure of control valve 61, it can be the butterfly valve, also can be the ball valve, as long as can control the break-make state of refrigerant circulation branch road 6 can, the technical staff in the field can set for by oneself according to actual conditions.
Further, a first heater 24 is further arranged on the low-pressure refrigerant circulation loop 2, the first heater 24 is arranged between the second heat exchanger 23 and the second compressor 21, and the first heater 24 can further heat and evaporate the refrigerant flowing out of the second heat exchanger 23 so as to prevent the second compressor 21 from liquid impact and ensure the service life.
Further preferably, the cascade heat pump system further includes a water pan 25 and a second heater 26, the water pan 25 is disposed near the second heat exchanger 23, the second heater 26 is disposed in the water pan 25, and the second heater 26 can further prevent the second heat exchanger 23 from frosting or freezing.
It should be noted that, the present invention does not limit the specific structure of the first heater 24, the water receiving tray 25 and the second heater 26, and the first heater 24 and the second heater 26 may be electric heaters or magnetic heaters, which are not restrictive, and can be set by those skilled in the art according to the actual situation.
In addition, in the preferred embodiment, the high-pressure refrigerant circulation loop 1 is further provided with a first gas-liquid separation member (not shown in the figure), and the first gas-liquid separation member is arranged at the air inlet of the first compressor 11; the low-pressure refrigerant circulation circuit 2 is further provided with a second gas-liquid separation member (not shown) provided at an air inlet of the second compressor 21. The first gas-liquid separation component and the second gas-liquid separation component can effectively avoid the problem that the first compressor 11 and the second compressor 21 have liquid impact, and effectively guarantee the service life of the first compressor 11 and the second compressor 21. Of course, the present invention does not limit the specific structure of the first gas-liquid separation member and the second gas-liquid separation member, and those skilled in the art can set the structure according to actual situations.
In addition, it should be noted that, the present invention does not limit the specific use of the cascade heat pump, and those skilled in the art can set the specific use according to actual situations.
So far, the technical solution of the present invention has been described with reference to the alternative embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims (10)
1. A cascade heat pump system is characterized in that the cascade heat pump system comprises a high-pressure refrigerant circulation loop, a low-pressure refrigerant circulation loop, a heat exchange water channel and a preheating water channel,
the high-pressure refrigerant circulation loop is provided with a first compressor, a first heat exchanger, a first throttling component and an intermediate heat exchanger, the low-pressure refrigerant circulation loop is provided with a second compressor, the intermediate heat exchanger, a second throttling component and a second heat exchanger, the high-pressure refrigerant circulation loop and the low-pressure refrigerant circulation loop exchange heat through the intermediate heat exchanger,
the heat exchanger is characterized in that a part of the heat exchange water path is arranged in the first heat exchanger, the preheating water path is connected with the heat exchange water path, an electric heating device and a solar power generation heating device are arranged on the preheating water path, the electric heating device and the solar power generation heating device are arranged to be capable of selectively preheating water in the preheating water path, and preheated water in the preheating water path enters the first heat exchanger.
2. The cascade heat pump system according to claim 1, wherein a three-way valve is provided on the preheated water path,
the three-way valve comprises an inlet and two outlets, the inlet of the three-way valve is connected with the electric heating device, the first outlet of the three-way valve is connected with the solar power generation heating device, and the second outlet of the three-way valve is connected with the heat exchange waterway.
3. The cascade heat pump system of claim 1, further comprising a refrigerant circulation branch,
a first end of the refrigerant circulation branch is connected between the second throttling member and the second heat exchanger, and a second end of the refrigerant circulation branch is connected between the second compressor and the intermediate heat exchanger.
4. The cascade heat pump system according to claim 3, wherein a control valve is provided in the coolant circulation branch, the control valve being configured to control an on/off state of the coolant circulation branch.
5. The cascade heat pump system according to claim 1, wherein a first heater is further disposed on the low-pressure refrigerant circulation loop, and the first heater is disposed between the second heat exchanger and the second compressor.
6. The cascade heat pump system of claim 1 further comprising a water-tray, wherein the water-tray is disposed proximate the second heat exchanger.
7. The cascade heat pump system of claim 6, further comprising a second heater disposed in the drip tray.
8. The cascade heat pump system according to any one of claims 1 to 7, wherein a first gas-liquid separating member is further disposed on the high-pressure refrigerant circulating loop,
the first gas-liquid separation member is disposed at an air inlet of the first compressor.
9. The cascade heat pump system according to any one of claims 1 to 7, wherein a second gas-liquid separating member is further provided on the low-pressure refrigerant circulation loop,
the second gas-liquid separating member is disposed at an air inlet of the second compressor.
10. The cascade heat pump system according to any one of claims 1 to 7, wherein the intermediate heat exchanger is a plate heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221988276.1U CN218154890U (en) | 2022-07-29 | 2022-07-29 | Cascade heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221988276.1U CN218154890U (en) | 2022-07-29 | 2022-07-29 | Cascade heat pump system |
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| CN218154890U true CN218154890U (en) | 2022-12-27 |
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| CN202221988276.1U Active CN218154890U (en) | 2022-07-29 | 2022-07-29 | Cascade heat pump system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116697639A (en) * | 2023-05-30 | 2023-09-05 | 江苏省华扬太阳能有限公司 | Solar energy-air source heat pump coupling hot water, heating, refrigerating and energy storage system and control method thereof |
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2022
- 2022-07-29 CN CN202221988276.1U patent/CN218154890U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116697639A (en) * | 2023-05-30 | 2023-09-05 | 江苏省华扬太阳能有限公司 | Solar energy-air source heat pump coupling hot water, heating, refrigerating and energy storage system and control method thereof |
| CN116697639B (en) * | 2023-05-30 | 2023-11-14 | 江苏省华扬太阳能有限公司 | Solar energy-air source heat pump coupling hot water, heating, refrigerating and energy storage system and control method thereof |
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