Cascade type high-temperature heat pump heat source equipment with double heat sources

Abstract

The invention discloses cascade type high-temperature heat pump heat source equipment with double heat sources, which comprises an intermediate heat exchange system, a first refrigeration compression cycle system, a second refrigeration compression cycle system and a third refrigeration compression cycle system, the first refrigeration compression circulation system comprises a first compressor, a first throttling device, a water source heat source heat exchanger, an electric ball valve, an axial flow fan and an air source heat source heat exchanger, and the second refrigeration compression circulation system comprises a heat release heat exchanger, a second compressor and a second throttling device. The heat medium circulating system comprises a steam flash evaporation device and a hot water circulating pump; circulating air and liquid are adopted as heat exchange media, and through combination of different heat exchangers, circulation of the first refrigeration compressor, overlapping of the intermediate heat exchangers and circulation of the second refrigeration compressor, heat absorption of different low-grade heat sources is achieved, and meanwhile the functions of refrigeration, heating and the like are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of high-temperature heat pump units, and in particular to a cascade high-temperature heat pump heat source device with dual heat sources. Background Art

[0002] With the advancement of science and technology, high-temperature heat pump hot water or steam units have made great progress. However, the current application is mainly based on higher-quality heat sources, and lower-quality heat sources are basically not applicable. It is even more impossible to achieve the application of dual heat sources. In places where there is a demand for refrigeration and high-temperature energy is provided, two systems are often used, one for refrigeration and the other for high-temperature energy production, resulting in a large amount of low-quality energy waste. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of this application is to provide a cascade high-temperature heat pump heat source equipment with dual heat sources, so as to effectively solve the above technical problems.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] The present application provides a cascade high-temperature heat pump heat source device with dual heat sources, comprising:

[0006] An intermediate heat exchange system, a first refrigeration compression cycle system and a second refrigeration compression cycle system, wherein:

[0007] The intermediate heat exchange system includes an intermediate heat exchanger, through which the first refrigeration compression cycle system is connected to the second refrigeration compression cycle system.

[0008] The first refrigeration compression cycle system includes a first compressor, a first throttling device, a water source heat source heat exchanger, an electric ball valve, an axial flow fan and an air source heat source heat exchanger, wherein:

[0009] The first end of the intermediate heat exchanger is connected to the first end of the first compressor, the second end of the first compressor is connected to the first ends of the water source heat source heat exchanger and the air source heat source heat exchanger, the second ends of the water source heat source heat exchanger and the air source heat source heat exchanger are connected through two outlets of the electric ball valve, the water source heat source heat exchanger and the air source heat source heat exchanger are connected in parallel, and the second end of the intermediate heat exchanger is connected to the electric ball valve through the first throttling device;

[0010] The second compression cycle system includes a heat release heat exchanger, a second compressor and a second throttling device.

[0011] The third end of the intermediate heat exchanger is connected to the second end of the second compressor, the first end of the second compressor is connected to the first end of the heat-releasing heat exchanger, and the second end of the heat-releasing heat exchanger is connected to the fourth end of the intermediate heat exchanger through the second throttling device;

[0012] Also includes:

[0013] A heat medium circulation system, the heat medium circulation system comprising a steam flash device and a hot water circulation pump, wherein:

[0014] The third end of the exothermic heat exchanger is connected to the first end of the steam flash device, and the second end of the steam flash device is connected to the fourth end of the exothermic heat exchanger through the hot water circulation pump.

[0015] Furthermore, the heat-releasing heat exchanger includes a heat exchanger for exchanging heat between a refrigerant and a liquid or a heat exchanger for exchanging heat between a refrigerant and air.

[0016] Furthermore, the water source heat source heat exchanger includes a plate heat exchanger or a shell and tube heat exchanger or a sleeve heat exchanger, and the water source heat source heat exchanger also includes other heat exchange devices that can have the same function.

[0017] Furthermore, the air source heat source heat exchanger includes a fin heat exchanger or a microchannel heat exchanger, and the air source heat source heat exchanger also includes other heat exchange devices that can have equivalent functions.

[0018] Furthermore, the first compressor includes a scroll compressor, a rotor compressor, a centrifugal compressor, a piston compressor, or a screw compressor, and the first compressor also includes other refrigeration compression devices with equivalent functions. The compression form of the first compressor includes fixed frequency or variable frequency.

[0019] Furthermore, the second compressor includes a scroll compressor, a rotor compressor, a centrifugal compressor, a piston compressor, or a screw compressor, and the second compressor also includes other refrigeration compression devices with equivalent functions. The compression form of the second compressor includes fixed frequency or variable frequency.

[0020] Furthermore, the first throttling device includes one or more expansion valves or throttling capillaries, and the first throttling device also includes other throttling devices with throttling purposes.

[0021] Furthermore, the second throttling device includes one or more expansion valves or throttling capillaries, and the second throttling device also includes other throttling devices with throttling purposes.

[0022] Furthermore, the intermediate heat exchanger includes a plate heat exchanger or a shell and tube heat exchanger or a sleeve and tube heat exchanger, and the intermediate heat exchanger also includes other heat exchange devices that may have equivalent functions.

[0023] Beneficial Effects

[0024] The present application provides a cascade high-temperature heat pump heat source device with dual heat sources, which uses circulating air and liquid as evaporative heat exchange media, and through a combination of different heat exchangers, a first refrigeration compressor cycle process, a cascade of an intermediate heat exchanger, and a second refrigeration compressor cycle process, to achieve heat absorption of different low-grade heat sources, thereby achieving functions such as refrigeration and heating at the same time. During heating, high-temperature hot air, high-temperature hot water or steam can be produced; the refrigeration part can produce low-temperature refrigerant water or air-conditioning cold air. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide an understanding of the technical solution of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solution of the present disclosure and do not constitute a limitation on the technical solution of the present disclosure. The shapes and sizes of the components in the accompanying drawings do not reflect the actual proportions and are only intended to illustrate the content of the present application.

[0026] Figure 1 This is a schematic diagram of the overall structure of the device provided for this application.

[0027] In the above attached figure:

[0028] 1. Intermediate heat exchange system; 11. Intermediate heat exchanger;

[0029] 2. First refrigeration compression cycle system; 21. First compressor; 22. First throttling device; 23. Water source heat source heat exchanger; 24. Electric ball valve; 25. Axial flow fan; 26. Air source heat source heat exchanger;

[0030] 3. Second refrigeration compression cycle system; 31. Heat release heat exchanger; 32. Second compressor; 33. Second throttling device;

[0031] 4. Heat medium circulation system; 41. Steam flash device; 42. Hot water circulation pump. DETAILED DESCRIPTION

[0032] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present application and are not limited to the scope of the present application. The implementation conditions adopted in the examples can be further adjusted as the conditions of the specific manufacturer, and the unspecified implementation conditions are usually the conditions in conventional experiments.

[0033] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connecting" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. In this article, "electrical connection" includes the situation where the constituent elements are connected together through an element with some electrical function. "Elements with some electrical function" are not particularly limited as long as they can transfer electrical signals between the connected constituent elements. "Elements with some electrical function" can be, for example, electrodes or wiring, or switching elements such as transistors, or other functional elements such as resistors, inductors or capacitors. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0034] In this application, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "middle", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0035] Example

[0036] An embodiment of the present application provides a cascade high-temperature heat pump heat source device with dual heat sources, such as Figure 1As shown, the device includes an intermediate heat exchange system 1, which includes an intermediate heat exchanger 11, and also includes a first refrigeration compression cycle system 2, which includes a first compressor 21, a first throttling device 22, a water source heat source heat exchanger 23, an electric ball valve 24, an axial flow fan 25 and an air source heat source heat exchanger 26, wherein: the first end of the intermediate heat exchanger 11 is connected to the first end of the first compressor 21, the second end of the first compressor 21 is connected to the first ends of the water source heat source heat exchanger 23 and the air source heat source heat exchanger 26, and the second ends of the water source heat source heat exchanger 23 and the air source heat source heat exchanger 26 are connected through the two outlets of the electric ball valve 24. The water source heat source heat exchanger 23 and the air source heat source heat exchanger 26 are in parallel. The water source heat source heat exchanger 23 and the air source heat source heat exchanger 26 can operate independently or simultaneously. The second end of the intermediate heat exchanger 11 is connected to the electric ball valve 24 through the first throttling device 22; it also includes a second refrigeration compression cycle system 3, the second refrigeration compression cycle system 3 includes an exothermic heat exchanger 31, a second compressor 32 and a second throttling device 33, the third end of the intermediate heat exchanger 11 is connected to the second end of the second compressor 32, the first end of the second compressor 32 is connected to the first end of the exothermic heat exchanger 31, and the second end of the exothermic heat exchanger 31 is connected to the fourth end of the intermediate heat exchanger 11 through the second throttling device 33; it also includes a heat medium circulation system 4, the heat medium circulation system 4 includes a steam flash device 41 and a hot water circulation pump 42, wherein the third end of the exothermic heat exchanger 31 is connected to the first end of the steam flash device 41, and the second end of the steam flash device 41 is connected to the fourth end of the exothermic heat exchanger 31 through the hot water circulation pump 42.

[0037] The working principle of the device provided in this embodiment is as follows:

[0038] The gaseous refrigerant discharged from the first compressor 21 circulates through the first refrigeration compression cycle system 2, and is condensed into liquid through the intermediate heat exchanger 11, and becomes a low-temperature and low-pressure refrigerant through the first throttling device 22. The refrigerant is switched to different heat source heat exchangers through the electric ball valve 24. When the electric ball valve 24 is switched to the water source heat source heat exchanger 23, the system can absorb heat from the circulating refrigerant water, cool down the circulating refrigerant water temperature, and realize the refrigeration function; when the electric ball valve 24 is switched to the air source heat source heat exchanger 26, the system can absorb heat from the air, cool down the air temperature, and realize the refrigeration function, wherein the air source heat source heat exchanger 26 needs to be used in conjunction with the axial flow fan 25. The gaseous refrigerant that absorbs heat through the water source heat source heat exchanger 23 or the air source heat source heat exchanger 26 is inhaled through the first compressor 21 and returns to the compressor, thereby realizing a cycle that repeats itself.

[0039] The process of transferring from the first refrigeration compression cycle to the second refrigeration compression cycle: the intermediate heat exchanger 11 transfers the heat generated by the first compressor 21 cycle to the second compressor 32 cycle, serving as a heat source for the second compressor 32 cycle, thereby realizing cascade operation.

[0040] The second refrigeration compression cycle process: it passes through the second throttling device 33 and becomes a low-temperature and low-pressure refrigerant, passes through the intermediate heat exchanger 11 to absorb the heat transferred by the first refrigeration compression cycle and becomes a gaseous refrigerant, passes through the second compressor 32 to absorb and compress, and becomes a high-temperature and high-pressure gaseous refrigerant, the high-temperature and high-pressure gaseous refrigerant passes through the heat release heat exchanger 31 to condense into liquid, and enters the second throttling device 33, thereby realizing a cycle that repeats itself over and over again.

[0041] Steam production process: When the system needs to produce steam, the hot water heated by the exothermic heat exchanger 31 enters the steam flash device 41, flashes into the required steam, and is discharged into the required process pipeline. The condensed water after flashing is transported to the exothermic heat exchanger 31 again for heating through the hot water circulation pump, thus realizing a cycle.

[0042] In some embodiments, the heat exchanger 31 includes a heat exchanger for exchanging heat between a refrigerant and a liquid or a heat exchanger for exchanging heat between a refrigerant and air.

[0043] In some embodiments, the water source heat source heat exchanger 23 includes a plate heat exchanger, a shell and tube heat exchanger, a sleeve heat exchanger, etc., and the water source heat source heat exchanger 23 also includes other heat exchange devices that can have the same function.

[0044] In some embodiments, the air source heat source heat exchanger 26 includes a fin heat exchanger, a microchannel heat exchanger, etc., and the air source heat source heat exchanger 26 also includes other heat exchange devices that can have the same function.

[0045] In some embodiments, the first compressor 21 and the second compressor 32 include a scroll compressor, a rotor compressor, a centrifugal compressor, a piston compressor, and a screw compressor, etc. At the same time, the first compressor 21 and the second compressor 32 also include other refrigeration compression devices that can have the same functions, wherein the compressor can be in the form of a fixed frequency or a variable frequency.

[0046] In some embodiments, the first throttling device 22 and the second throttling device 33 include one or more expansion valves or throttling capillaries, and also include all other throttling devices with throttling purposes.

[0047] In some embodiments, the intermediate heat exchanger 11 includes a plate heat exchanger, a shell and tube heat exchanger, a sleeve heat exchanger, etc., and the intermediate heat exchanger 11 also includes other heat exchange devices that can have the same function.

[0048] The above embodiments are only for illustrating the technical concept and features of the present application, and their purpose is to enable people familiar with the technology to understand the content of the present application and implement it accordingly, and they cannot be used to limit the protection scope of the present application. Any equivalent transformation or modification made according to the spirit of the present application shall be included in the protection scope of the present application.

Claims

1. A cascade high-temperature heat pump heat source device with dual heat sources, characterized in that: include: An intermediate heat exchange system, a first refrigeration compression cycle system and a second refrigeration compression cycle system, wherein: The intermediate heat exchange system includes an intermediate heat exchanger, through which the first refrigeration compression cycle system is connected to the second refrigeration compression cycle system. The first refrigeration compression cycle system includes a first compressor, a first throttling device, a water source heat source heat exchanger, an electric ball valve, an axial flow fan and an air source heat source heat exchanger, wherein: The first end of the intermediate heat exchanger is connected to the first end of the first compressor, the second end of the first compressor is connected to the first ends of the water source heat source heat exchanger and the air source heat source heat exchanger, the second ends of the water source heat source heat exchanger and the air source heat source heat exchanger are connected through two outlets of the electric ball valve, the water source heat source heat exchanger and the air source heat source heat exchanger are connected in parallel, and the second end of the intermediate heat exchanger is connected to the electric ball valve through the first throttling device; The second compression cycle system includes a heat release heat exchanger, a second compressor and a second throttling device. The third end of the intermediate heat exchanger is connected to the second end of the second compressor, the first end of the second compressor is connected to the first end of the heat-releasing heat exchanger, and the second end of the heat-releasing heat exchanger is connected to the fourth end of the intermediate heat exchanger through the second throttling device; Also includes: A heat medium circulation system, the heat medium circulation system comprising a steam flash device and a hot water circulation pump, wherein: The third end of the exothermic heat exchanger is connected to the first end of the steam flash device, and the second end of the steam flash device is connected to the fourth end of the exothermic heat exchanger through the hot water circulation pump.

2. The cascade high-temperature heat pump heat source equipment with dual heat sources according to claim 1, characterized in that: The heat-releasing heat exchanger includes a heat exchanger for exchanging heat between a refrigerant and a liquid or a heat exchanger for exchanging heat between a refrigerant and air.

3. The cascade high-temperature heat pump heat source equipment with dual heat sources according to claim 1, characterized in that: The water source heat source heat exchanger includes a plate heat exchanger, a shell and tube heat exchanger, or a sleeve and tube heat exchanger.

4. The cascade high-temperature heat pump heat source equipment with dual heat sources according to claim 1, characterized in that: The air source heat source heat exchanger includes a fin heat exchanger or a microchannel heat exchanger.

5. The cascade high-temperature heat pump heat source equipment with dual heat sources according to claim 1, characterized in that: The first compressor includes a scroll compressor, a rotor compressor, a centrifugal compressor, a piston compressor, or a screw compressor, and the compression mode of the first compressor includes fixed frequency or variable frequency.

6. The cascade high-temperature heat pump heat source equipment with dual heat sources according to claim 1, characterized in that: The second compressor includes a scroll compressor, a rotor compressor, a centrifugal compressor, a piston compressor, or a screw compressor, and the compression mode of the second compressor includes fixed frequency or variable frequency.

7. The cascade high-temperature heat pump heat source equipment with dual heat sources according to claim 1, characterized in that: The first throttling device comprises one or more expansion valves or throttling capillaries.

8. The cascade high-temperature heat pump heat source equipment with dual heat sources according to claim 1, characterized in that: The second throttling device comprises one or more expansion valves or throttling capillaries.

9. The cascade high-temperature heat pump heat source equipment with dual heat sources according to claim 1, characterized in that: The intermediate heat exchanger includes a plate heat exchanger, a shell and tube heat exchanger, or a double-tube heat exchanger.

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