Solar-assisted high-temperature cascade heat pump unit
By designing a solar-assisted high-temperature cascade heat pump unit, combined with an intermediate hot water tank and a multi-energy heat exchanger, the problems of unstable solar heating, high energy consumption of low-temperature heat pumps, and high cost of cascade heat pumps in existing technologies have been solved, achieving a highly efficient and energy-saving high-temperature heating effect.
Patent Information
- Application Number
- CN202422422395.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-10-09
AI Technical Summary
Existing solar thermal heating technology cannot provide stable heating around the clock, low-temperature heat pump heating has high energy consumption, and high-temperature cascade heat pump technology is costly and noisy, making it difficult to meet the demand for efficient and economical high-temperature heating.
Design a solar-assisted high-temperature cascade heat pump unit that combines an intermediate heat exchange tank, a solar heat exchanger, and a low-temperature air source heat pump. Through the multi-energy composite energy-saving concept, solar thermal energy is used to provide heat source for the intermediate heat exchanger during the day, and the low-temperature air source heat pump supplements it at night. Combined with the high-temperature heat pump, a high-temperature and high-efficiency heat source is generated.
It enables the supply of high-temperature heat sources above 80℃, improves energy efficiency, solves the problem of high-temperature, high-efficiency, and energy-saving heating, and is suitable for a wide range of heating applications.
Smart Images
Figure CN223755487U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to a solar energy assisted high-temperature cascade heat pump unit suitable for the technical field of solar energy and heat pump heating. BACKGROUND
[0002] There are three main forms of existing clean energy heating: solar light and heat heating technology, low-temperature air source heat pump heating technology and high-temperature cascade heat pump heating technology.
[0003] Solar light and heat heating, the existing solar light and heat heating technology is limited by weather and night conditions, and has the problem that heat is difficult to balance, cannot stably meet the all-weather heating demand, and is not economical due to large initial investment. Auxiliary energy must be relied on to ensure supply.
[0004] The existing low-temperature heat pump heating technology can adapt to severe cold conditions and can stably produce medium and low-temperature heat sources of 41 DEG C. If it is used to produce a heat source of 55 DEG C, the energy consumption is very high, the energy efficiency is about 1:1.1 at -20 DEG C, the purpose of energy saving is lost, and it can only adapt to the economic heating in cold regions and the maximum heating capacity is a heat source of 60 DEG C, and the application range is small.
[0005] The existing high-temperature cascade heat pump technology uses double-stage compression to generate hot water of more than 80 DEG C, is suitable for heating in extremely cold regions and high-heat-value fields such as waste heat steam, has high production cost, is loud, is not suitable for general high-temperature heat demand, is suitable for special production and industrial production industries, and is difficult to meet the efficient economic conditions. SUMMARY
[0006] One of the purposes of the application is to provide a solar energy assisted high-temperature cascade heat pump unit.
[0007] In order to achieve the above object, the technical scheme adopted by the present application is: comprising an intermediate heat exchange water tank, the inside of the intermediate heat exchange water tank is sequentially provided from bottom to top with a primary condenser, a solar heat exchanger and a secondary evaporator, the primary condenser, the solar heat exchanger and the secondary evaporator are fixed on the intermediate heat exchange water tank, the upper part of the intermediate heat exchange water tank is provided with a primary evaporator and a fan, one end of the primary evaporator is connected with the primary condenser, and the other end of the primary evaporator is connected with a primary compressor; the upper side of the intermediate heat exchange water tank is provided with the primary compressor and an electric control box, the primary compressor is provided with a primary low-pressure inlet and a primary high-pressure outlet, the primary low-pressure inlet is connected with the primary evaporator, the primary high-pressure outlet is connected with the primary condenser, the electric control box is electrically connected with the fan, the primary compressor and a secondary compressor, and temperature sensors are arranged on the primary evaporator and a secondary condenser; the side of the intermediate heat exchange water tank is provided with the secondary compressor and the secondary condenser, the secondary compressor is provided with a secondary high-pressure outlet and a secondary low-pressure inlet, the secondary condenser is provided with a cold water inlet, a hot water outlet, a heat exchanger high-temperature inlet and a heat exchanger low-temperature outlet, the secondary low-pressure inlet is connected with the secondary evaporator, the secondary high-pressure outlet is connected with the heat exchanger low-temperature outlet, and the heat exchanger high-temperature inlet is connected with the secondary evaporator; the intermediate heat exchange water tank, the primary evaporator, the primary compressor, the secondary compressor, the secondary condenser and the electric control box are installed in a machine case shell, the fan is installed on the machine case shell, a solar heat collecting plate is arranged above the machine case shell, and the solar heat collecting plate is connected with the solar heat exchanger.
[0008] Preferably, the intermediate heat exchange water tank is a closed metal water tank, the material thickness is not less than two millimeters, and the inside is filled with a heat conducting medium, and the heat conducting medium is preferably water.
[0009] Preferably, the primary compressor is an R410A refrigerant variable frequency compressor, and the secondary compressor is an R134A refrigerant high-temperature compressor.
[0010] Preferably, the primary evaporator adopts a finned L-shaped hydrophilic aluminum foil copper tube heat exchanger.
[0011] Preferably, the area of the primary condenser is smaller than the area of the secondary evaporator.
[0012] Preferably, the inside of the solar heat collecting plate is a full-flow structure and is provided with a solar high-efficiency absorption coating.
[0013] Compared with the prior art, the present application has the following beneficial effects:
[0014] The solar energy assisted high-temperature cascade heat pump unit is provided with an intermediate heat exchange water tank on the heat pump unit, so that the solar energy photothermal technology and the low-temperature air source heat pump technology are combined together, the problem that a single heat pump cannot stably provide a 60-80 DEG C heat source technology demand and a single product cannot complete high-temperature and high-efficiency energy-saving heating is solved, the product adopts the energy-saving concept of multi-energy composite, the intermediate heat exchanger multi-energy heat exchanger is independently researched and developed, the solar energy photothermal can be provided for the intermediate multi-functional heat exchanger in a sunny day, the low-temperature air source heat pump provides the low-temperature heat source for the intermediate multi-energy heat exchanger in the rainy, snowy and night, that is, the stable low-temperature heat source demand is provided, the energy efficiency is greatly improved, the energy-saving effect is obvious, and the high-temperature heat source above 80 DEG C is generated by the high-temperature heat pump cascade, the product has high automatic control degree and simple operation, and the running state can be observed by remote operation equipment, the product solves the problem of the high-temperature heat source above 80 DEG C, realizes the high-efficiency energy-saving effect, and greatly improves the use scene, and can meet many heat using fields. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is the overall structure diagram of the present application Figure 1 ;
[0016] Figure 2 is the intermediate heat exchanger structure diagram of the present application
[0017] Figure 3 is the internal structure diagram of the present application after removing the machine case shell.
[0018] In the figure: 1, intermediate heat exchange water tank; 101, primary condenser; 102, solar heat exchanger; 103, secondary evaporator; 2, primary evaporator; 3, fan; 4, primary compressor; 401, primary low-pressure inlet; 402, primary high-pressure outlet; 5, secondary compressor; 501, secondary high-pressure outlet; 502, secondary low-pressure inlet; 6, secondary condenser; 601, cold water inlet; 602, hot water outlet; 603, heat exchanger high-temperature inlet; 604, heat exchanger low-temperature outlet; 7, electric control box; 8, machine case shell; 9, solar heat collecting plate. DETAILED DESCRIPTION
[0019] In the following, the application is further described in combination with specific embodiments, and it should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict.
[0020] In the description of the present application, it should be noted that for orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The orientation and positional relationship shown in the drawing is based on the orientation or positional relationship, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.
[0021] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence.
[0022] As Figures 1 to 3 shown, the present application provides a technical solution, a solar-assisted high-temperature cascade heat pump unit, comprising an intermediate heat exchange water tank 1, the inside of the intermediate heat exchange water tank 1 is filled with a heat conducting medium, from bottom to top, a primary condenser 101, a solar heat exchanger 102, and a secondary evaporator 103 are arranged in sequence, the primary condenser 101, the solar heat exchanger 102, and the secondary evaporator 103 are fixed on the intermediate heat exchange water tank 1, a primary evaporator 2 and a fan 3 are arranged at the upper part of the intermediate heat exchange water tank 1, one end of the primary evaporator 2 is connected to the primary condenser 101, and the other end is connected to a primary compressor 4; The fan 3 forcibly sends external air into the primary evaporator 2, the primary evaporator 2 evaporates low-temperature refrigerant and exchanges heat with external air, absorbs heat, then sends the refrigerant into the first compressor 4, compresses and heats, and sends high-temperature refrigerant into the primary condenser 101 to circulate and release heat, after the heat release is completed, low-temperature refrigerant is sent into the primary evaporator 2 again, to complete the conversion of air energy.
[0023] A primary compressor 4 and an electrical control box 7 are arranged on the upper side of the intermediate heat exchange water tank 1, the primary compressor 4 is provided with a primary low-pressure inlet 401 and a primary high-pressure outlet 402, the primary low-pressure inlet 401 is connected to the primary evaporator 2, the primary high-pressure outlet 402 is connected to the primary condenser 101, the electrical control box 7 is electrically connected with the fan 3, the primary compressor 4, and a secondary compressor 5, and temperature sensors are arranged on the primary evaporator 2 and a secondary condenser 6;
[0024] The side of the intermediate heat exchange water tank 1 is the secondary compressor 5 and the secondary condenser 6. The secondary compressor 5 is provided with a secondary high-pressure outlet 501 and a secondary low-pressure inlet 502. The secondary condenser 6 is provided with a cold water inlet 601, a hot water outlet 602, a heat exchanger high-temperature inlet 603, and a heat exchanger low-temperature outlet 604. The secondary low-pressure inlet 502 is connected to the secondary evaporator 103. The secondary high-pressure outlet 501 is connected to the heat exchanger low-temperature outlet 604. The heat exchanger high-temperature inlet 603 is connected to the secondary evaporator 103.
[0025] The intermediate heat exchange water tank 1, the primary evaporator 2, the primary compressor 4, the secondary compressor 5, the secondary condenser 6, and the electrical control box 7 are installed in the machine case shell 8. The fan 3 is installed on the machine case shell 8. The machine case shell 8 is provided with a solar heat collecting plate 9 above. The solar heat collecting plate 9 is connected to the solar heat exchanger 102.
[0026] As shown in the combination Figures 1 to 3 The intermediate heat exchange water tank 1 is a closed metal water tank. The material thickness is not less than two millimeters. The inside is filled with a heat conduction medium. The heat conduction medium is preferably water.
[0027] As shown in the combination Figures 1 to 3 The primary compressor 4 is an R410A refrigerant variable frequency compressor. The secondary compressor 5 is an R134A refrigerant high-temperature compressor.
[0028] As shown in the combination Figures 1 to 3 The primary evaporator adopts a finned L-shaped hydrophilic aluminum foil copper tube heat exchanger.
[0029] As shown in the combination Figures 1 to 3 The area of the primary condenser 101 is smaller than that of the secondary evaporator 103. The use efficiency of the primary compressor 4 is improved. The solar heat is used to the maximum extent.
[0030] As shown in the combination Figures 1 to 3 The inside of the solar heat collecting plate 9 is a full-flow structure. A solar high-efficiency absorption coating is arranged. The solar heat collecting plate 9 has an inlet and an outlet. The inlet and the outlet are connected to the inlet and the outlet of the solar heat exchanger 102 through pipelines. The pipelines are filled with a heat conduction medium. When the solar heat collecting plate 9 absorbs solar heat and heats up, when the temperature is higher than that of the intermediate heat exchange water tank 1, the water pump starts to circulate the heat in the solar heat collecting plate 9 to the intermediate heat exchange water tank 1. When the temperature of the intermediate heat exchange water tank 1 is equal to that of the solar heat collecting plate 9, the circulation is stopped. The temperature of the intermediate heat exchange water tank 1 is increased in this way.
[0031] The secondary evaporator 103 performs secondary heat exchange on the heat in the intermediate heat exchanger 1 through low-temperature refrigerant. The secondary compressor 5 is used for secondary compression and temperature rise. The secondary condenser 6 is used for heat release. At this time, it becomes high-temperature hot water. The secondary compression uses water-fluorine heat exchange. There is no fan noise.
[0032] Working principle: when the unit is running, the primary evaporator absorbs heat from the air, and the temperature is raised to the intermediate heat exchange water tank through the compressor, the solar energy collector converts solar energy into heat energy to heat the intermediate water tank, and the secondary evaporator absorbs heat from the water temperature of the intermediate heat exchange water tank, and the temperature is raised to high temperature hot water through the secondary compressor.
[0033] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.
Claims
1. A solar energy assisted high temperature cascade heat pump unit comprising an intermediate heat exchange water tank (1), characterized in that, The intermediate heat exchange water tank (1) is internally provided with a primary condenser (101), a solar heat exchanger (102) and a secondary evaporator (103) from bottom to top, the primary condenser (101), the solar heat exchanger (102) and the secondary evaporator (103) are fixed on the intermediate heat exchange water tank (1), the intermediate heat exchange water tank (1) is provided with a primary evaporator (2) and a fan (3) at the upper portion, one end of the primary evaporator (2) is connected with the primary condenser (101) and the other end is connected with a primary compressor (4); The intermediate heat exchange water tank (1) is provided with the primary compressor (4) and an electric control box (7) at the upper side, the primary compressor (4) is provided with a primary low-pressure inlet (401) and a primary high-pressure outlet (402), the primary low-pressure inlet (401) is connected with the primary evaporator (2), the primary high-pressure outlet (402) is connected with the primary condenser (101), the electric control box (7) is electrically connected with the fan (3), the primary compressor (4) and a secondary compressor (5), and temperature sensors are arranged on the primary evaporator (2) and a secondary condenser (6); The intermediate heat exchange water tank (1) is provided with the secondary compressor (5) and the secondary condenser (6) at the side, the secondary compressor (5) is provided with a secondary high-pressure outlet (501) and a secondary low-pressure inlet (502), the secondary condenser (6) is provided with a cold water inlet (601), a hot water outlet (602), a heat exchanger high-temperature inlet (603) and a heat exchanger low-temperature outlet (604), the secondary low-pressure inlet (502) is connected with the secondary evaporator (103), the secondary high-pressure outlet (501) is connected with the heat exchanger low-temperature outlet (604), and the heat exchanger high-temperature inlet (603) is connected with the secondary evaporator (103). The intermediate heat exchange water tank (1), the primary evaporator (2), the primary compressor (4), the secondary compressor (5), the secondary condenser (6) and the electric control box (7) are installed in a machine case shell (8), the fan (3) is installed on the machine case shell (8), and a solar heat collecting plate (9) is arranged above the machine case shell (8) and connected with the solar heat exchanger (102).
2. The solar assisted high temperature cascading heat pump unit according to claim 1, characterized in that, The intermediate heat exchange water tank (1) is a closed metal water tank, the material thickness is not less than two millimeters, and the inside is filled with a heat conducting medium, which is water.
3. The solar assisted high temperature cascading heat pump unit according to claim 1, wherein, The primary compressor (4) is an R410A refrigerant variable frequency compressor, and the secondary compressor (5) is an R134A refrigerant high-temperature compressor.
4. The solar assisted high temperature cascading heat pump unit according to claim 1, wherein, The primary evaporator (2) adopts a finned L-shaped hydrophilic aluminum foil copper tube heat exchanger.
5. The solar assisted high temperature cascading heat pump unit according to claim 1, wherein, The fan (3) is a full direct-current variable frequency fan.
6. The solar assisted high temperature cascading heat pump unit according to claim 1, wherein, The primary condenser (101) has a smaller area than the secondary evaporator (103).
7. The solar assisted high temperature cascading heat pump unit according to claim 1, wherein, The solar heat collecting plate (9) has a full-flow channel structure and is provided with a solar selective high-efficiency absorption coating.