Heat pump system

Abstract

The present disclosure relates to a heat pump system comprising: a supply device (1) configured to provide a medium to be heated; a storage device (2) configured to store the heated medium; the one or more heat pump modules (3) are connected with the supply device (1) and the storage device (2) respectively and are configured to heat a medium provided by the supply device (1), and the number of the heat pump modules (3) is the ratio of the heat power requirement of a user to the heat output power of each heat pump module (3); wherein each heat pump module (3) comprises a compressor (31), a condenser (32), a throttling element (33) and an evaporation assembly which are sequentially connected, and each evaporation assembly comprises an evaporator (34) and a photovoltaic photo-thermal assembly (35) which are connected in parallel.

Description

Technical Field

[0001] This disclosure relates to the field of heat pump technology, and more particularly to a heat pump system. Background Technology

[0002] Photovoltaic modules generate heat during operation. Utilizing the waste heat generated by photovoltaic modules to drive a heat pump can efficiently utilize solar energy and help dissipate heat from the photovoltaic modules, thus maintaining their power generation efficiency.

[0003] To achieve optimal heat pump performance, photovoltaic (PV) heat pumps require engineering design for different heat pump systems. However, in actual engineering applications of PV heat pumps, customers' thermal power requirements are not fixed. Designing PV heat pump systems for each customer individually would consume a significant amount of time and effort for the company's R&D personnel. Utility Model Content

[0004] In view of this, the present disclosure provides a heat pump system that can flexibly meet the diverse needs of users and reduce design costs.

[0005] In one aspect of this disclosure, a heat pump system is provided, comprising:

[0006] The supply device is configured to provide the medium to be heated;

[0007] A storage device configured to store a heated medium; and

[0008] One or more heat pump modules, each heat pump module being connected to a supply device and a storage device, configured to heat a medium supplied from the supply device, the number of heat pump modules being the ratio of the user's thermal power demand to the thermal output power of each heat pump module;

[0009] Each heat pump module includes a compressor, a condenser, a throttling element, and an evaporation assembly connected in sequence. The evaporation assembly includes an evaporator and a photovoltaic thermal assembly connected in parallel.

[0010] In some embodiments, the number of photovoltaic thermal components in each heat pump module is one or more;

[0011] In this context, the number of photovoltaic (PV) thermal modules in each heat pump module is the ratio of the total required heat exchange power of the PV thermal modules to the heat exchange capacity of each PV thermal module. The total required heat exchange power of the PV thermal modules is the difference between the heat output power of each heat pump module and the power of the compressor.

[0012] In some embodiments, the medium is a liquid; the heat pump system further includes:

[0013] A liquid level sensor, installed in the storage device, is configured to acquire liquid level information in the storage device.

[0014] In some embodiments, the heat pump system further includes:

[0015] The first valve, located between the throttling element and the evaporator, is configured to switch the on / off state of the piping between the throttling element and the evaporator; and

[0016] The second valve is located between the throttling element and the photovoltaic thermal module and is configured to switch the on / off state of the pipeline between the throttling element and the photovoltaic thermal module.

[0017] In some embodiments, the condenser of each heat pump module is connected in parallel with the storage device and the supply device, respectively;

[0018] The heat pump system also has one or more third valves, which are located between the supply device and the condenser and are configured to switch the supply line on and off.

[0019] In some embodiments, the heat pump system further includes:

[0020] A temperature sensor, located in the return water line between the heat pump module and the storage device, is configured to acquire the return water temperature of the liquid delivered to the storage device.

[0021] In some embodiments, the first valve and the second valve are fluorine solenoid valves.

[0022] In some embodiments, the third valve is a water solenoid valve.

[0023] In some embodiments, the heat pump module has a first interface and a second interface, the first interface being used to connect to a supply device pipeline and the second interface being used to connect to a storage device pipeline.

[0024] Therefore, according to the embodiments of this disclosure, the heat pump system is divided into one or more heat pump modules. By coordinating the number of heat pump modules, the diverse thermal power needs of consumers can be flexibly met. There is no need to design photovoltaic thermal heat pump system products separately for each customer, which helps to reduce design and development costs. Attached Figure Description

[0025] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0026] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0027] Figure 1 This is a structural schematic diagram of some embodiments of the heat pump system according to the present disclosure.

[0028] In the picture:

[0029] 1. Supply device; 11. Pump; 2. Storage device; 3. Heat pump module; 31. Compressor; 32. Condenser; 33. Throttling element; 34. Evaporator; 35. Photovoltaic thermal module; 4. Liquid level sensor; 61. First valve; 62. Second valve; 63. Third valve; 7. Temperature sensor; 8. Water supply end.

[0030] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components. Detailed Implementation

[0031] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0032] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0033] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0034] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0035] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0036] Photovoltaic power generation technology is considered one of the most promising new energy technologies.

[0037] Timely removal of waste heat generated by sunlight during photovoltaic operation can help dissipate heat from photovoltaic modules, maintain their optimal operating temperature and power generation efficiency. Utilizing the waste heat generated by photovoltaic modules to drive a heat pump for heating can also efficiently utilize solar energy, increasing heat output without increasing the photovoltaic area, thus achieving a win-win situation.

[0038] To achieve optimal heat pump performance, heat pumps equipped with different compressors and rated heat outputs need to be matched with the optimal number of photovoltaic (PV) thermal modules. Furthermore, to ensure uniform flow and avoid the adverse effects of uneven temperature distribution in PV thermal modules caused by uneven refrigerant distribution, the series and parallel connections between PV thermal modules should also be optimized. Therefore, a heat pump system with a fixed rated heat output needs a well-matched number of PV thermal modules and an optimized series and parallel connection to fully utilize the system performance of the PV thermal heat pump.

[0039] The related technologies do not take into account the engineering application of photovoltaic heat pumps. In order to achieve the best heat pump performance, different heat pump systems need to be designed for engineering applications. However, in the actual engineering application of photovoltaic heat pumps, the customer's heat power requirements are not fixed. If photovoltaic heat pump system products are designed separately for each customer, it will consume a lot of time and energy of the company's R&D personnel.

[0040] In view of this, in one aspect of the embodiments of this disclosure, a heat pump system is provided that can flexibly meet the diverse needs of users and reduce design costs.

[0041] Figure 1 These are schematic diagrams of some embodiments of the heat pump system disclosed herein, with reference to... Figure 1 The heat pump system includes a supply device 1, a storage device 2, and one or more heat pump modules 3. Figure 1 The figure shows two heat pump modules 3. When the number of heat pump modules 3 is greater than two, they are arranged in the same way as shown in the figure.

[0042] The supply device 1 is configured to provide the medium to be heated, for example, the supply device 1 is a cold water tank, which supplies cold water to the heat pump module 3 so that the heat pump module 3 can heat the water.

[0043] Storage device 2 is configured to store heated medium, for example, storage device 2 is a water tank, and water heated by heat pump module 3 is collected in storage device 2 through pipeline.

[0044] The medium includes, but is not limited to, liquids and gases, such as water or air. When the medium is a liquid, the storage device 2 is connected to the user's water supply terminal 8 to provide hot water to the user. Each heat pump module 3 is equipped with a cold water interface and a hot water interface, which are connected to the supply device 1 and the storage device 2 respectively. The supply device 1 has a variable frequency pump 11 for pumping water from the supply device 1 to the heat pump modules 3.

[0045] The cold water referred to in this embodiment includes, but is not limited to, liquids at the local ambient temperature. The cold water is not heated by the heat pump module 3. The hot water is a liquid heated by the heat pump module 3, and the temperature of the hot water is higher than that of the cold water.

[0046] There are one or more heat pump modules 3, each of which is connected in parallel with the supply device 1 and the storage device 2. The heat pump module 3 is configured to heat the medium supplied by the supply device 1 to meet the user's heating needs. Each heat pump module 3 is provided with a cold water interface and a hot water interface, which are connected to the supply device 1 and the storage device 2 respectively.

[0047] The number of heat pump modules 3 is the ratio of the user's heat power demand to the heat output power of each heat pump module 3. The user's heat power demand is determined according to the actual situation, and the number of heat pump modules 3 is allocated according to the user's heat power demand ratio.

[0048] For example, if a customer requires a power output of 36kW and the heat pump module's heat output power is 12kW, the designer needs to configure three heat pump modules 3 for the user. When the ratio of the user's heat power requirement to the heat output power of each heat pump module 3 is not an integer, the designer calculates the product of the integer part of the ratio and the heat output power of the heat pump module 3. If the difference between the user's heat power requirement and the product of the integer part of the ratio and the heat output power of the heat pump module 3 exceeds half of the heat output power of the heat pump module 3, it is rounded up to improve the user experience; otherwise, it is rounded down.

[0049] Each heat pump module 3 includes a compressor 31, a condenser 32, a throttling element 33, and an evaporation assembly. The evaporation assembly includes an evaporator 34 and a photovoltaic thermal assembly 35 connected in parallel. The compressor 31, condenser 32, throttling element 33 and the evaporator 34 or the photovoltaic thermal assembly 35 sequentially form a refrigerant circulation loop.

[0050] When the ambient irradiance is high, the user can make the compressor 31, condenser 32, throttling element 33 and photovoltaic thermal module 35 form a refrigerant circulation loop in sequence, and use the waste heat of photovoltaic thermal module 35 to raise the temperature of the medium.

[0051] When the ambient radiation intensity is low, the user can make the compressor 31, condenser 32, throttling element 33 and evaporator 34 form a refrigerant circulation loop in sequence, and use the waste heat of evaporator 34 to raise the temperature of the medium.

[0052] Users can decide whether to use a traditional evaporator 34 or a photovoltaic thermal module 35 based on the intensity of real-time environmental irradiance, thereby maximizing the utilization efficiency of the photovoltaic thermal module 35 and enabling the heat pump system to achieve better operating efficiency.

[0053] In this embodiment, the heat pump system is divided into one or more heat pump modules 3. Designers can flexibly meet the diverse heat power needs of consumers by coordinating the number of heat pump modules 3, without having to design photovoltaic heat pump system products for each customer separately, which helps to reduce design and development costs.

[0054] refer to Figure 1 In some embodiments, the number of photovoltaic thermal modules 35 in each heat pump module 3 is one or more. The number of photovoltaic thermal modules 35 in each heat pump module 3 is the ratio of the total required heat exchange power of the photovoltaic thermal modules 35 to the heat exchange capacity of each photovoltaic thermal module 35, where the total required heat exchange power of the photovoltaic thermal modules 35 is the difference between the heat output power of each heat pump module 3 and the power of the compressor 31.

[0055] The heat output power of the heat pump module 3 is determined based on actual conditions such as the number of photovoltaic and thermal modules that the user's roof can accommodate, as well as parameters such as the pressure drop and heat exchange capacity of the heat pump module 3, so that the heat pump module 3 can be applied to most usage scenarios.

[0056] Designers determine the total required heat exchange power of the photovoltaic thermal module 35 based on the difference between the heat output power of the heat pump module 3 and the power of the compressor 31. Then, based on the total required heat exchange power and the rated heat exchange capacity of the photovoltaic thermal module 35, they determine the number of photovoltaic thermal modules 35 in each heat pump module. The number and series / parallel connection configuration of the photovoltaic thermal modules 35 can be optimized and adjusted through simulation and experimental verification to enable the heat pump module 3 to operate more efficiently.

[0057] In this embodiment, the number of photovoltaic thermal components 35 in each heat pump module 3 is fixed, eliminating the need to readjust the design according to different customer thermal power requirements, thereby reducing engineering design costs and improving work efficiency.

[0058] refer to Figure 1 In some embodiments, the medium is a liquid, and the heat pump system also includes a liquid level sensor 4 and a controller 5.

[0059] A liquid level sensor 4 is disposed in the storage device 2 and configured to acquire liquid level information in the storage device 2. The liquid level sensor 4 includes, but is not limited to, a float-type sensor disposed in the storage device 2, which acquires information such as the liquid level height and rate of change in the storage device 2 in real time.

[0060] Users can obtain liquid level information from the liquid level sensor 4 so as to adjust the working status of the heat pump module 3 in a timely manner according to factors such as hot water storage conditions and environmental irradiance.

[0061] In this embodiment, a liquid level sensor 4 is set to detect the heated liquid level in the storage device 2 in real time, so that the user can keep track of the hot water storage status and flexibly adjust the working status of the heat pump module 3 according to the heat demand and the intensity of environmental radiation.

[0062] refer to Figure 1 In some embodiments, the heat pump system further includes a first valve 61 and a second valve 62. The first valve 61 is disposed between the throttling element 33 and the evaporator 34, and is configured to switch the flow between the throttling element 33 and the evaporator 34. The second valve 62 is disposed between the throttling element 33 and the photovoltaic thermal module 35, and is configured to switch the flow between the throttling element 33 and the photovoltaic thermal module 35. The first valve 61 and the second valve 62 include, but are not limited to, solenoid valves.

[0063] When the user's heat demand is high, the working state of the first valve 61 and the second valve 62 can be adjusted according to the ambient irradiance to allow the evaporator 34 or the photovoltaic thermal module 35 to participate in the refrigerant circulation, thereby generating more heat.

[0064] The high-temperature, high-pressure gaseous refrigerant from compressor 31 flows through condenser 32 for heat exchange, used to heat water and meet customer heat demands. After the gaseous refrigerant is condensed into liquid high-pressure refrigerant by condenser 32, it flows through throttling element 33 to become a low-temperature, low-pressure gas-liquid mixture refrigerant.

[0065] When a user's heating demand exceeds the preset demand, more hot water needs to be generated through the heat pump module 3. The user can decide to open either the first valve 61 or the second valve 62 based on local environmental irradiance, allowing the low-temperature, low-pressure gas-liquid mixture of refrigerant to flow into the evaporator 34 or the photovoltaic thermal module 35 for evaporation and heat absorption, thereby creating higher system performance. The gaseous refrigerant, after absorbing heat and evaporating, is then drawn back into the compressor 31 to start the next cycle.

[0066] In this embodiment, when the user's heat demand is high, the user can switch between using a traditional evaporator 34 or a photovoltaic thermal module 35 to participate in the refrigerant cycle and generate heat based on the real-time ambient irradiance intensity. This coordinates the working state of the heat pump system when the sunlight is strong and weak, allowing the heat pump system to achieve better operating efficiency and keep the heat pump system in a high-performance state at all times.

[0067] refer to Figure 1 In some embodiments, the condenser 32 of each heat pump module 3 is connected in parallel with the storage device 2 and the supply device 1, respectively. The heat pump system also has one or more third valves 63 disposed in the chilled water supply line between the supply device 1 and the condenser 32, and configured to switch the on / off state of the supply line.

[0068] The third valve 63 is, but is not limited to, a solenoid valve. Users can adjust the number of heat pump modules 3 that are turned on by adjusting the working state of the third valve 63.

[0069] In this embodiment, the state of cold water supply to the heat pump module 3 is switched by setting a third valve 63, so that the user can control the number of heat pump modules 3 that are turned on.

[0070] refer to Figure 1 In some embodiments, the heat pump system further includes a temperature sensor 7, which is disposed in the return water line between the heat pump module 3 and the storage device 2 and is configured to obtain the return water temperature of the hot water delivered to the storage device 2.

[0071] Users can adjust the number of heat pump modules 3 that are turned on based on the relationship between the return water temperature obtained by the ambient irradiance and / or the temperature sensor 7 and the preset temperature.

[0072] When users have high heating demand, and the ambient irradiance is greater than zero, which is generally during the daytime, users can turn on all heat pumps to provide heating, so as to store hot water during the day for use at night.

[0073] When the ambient irradiance is less than zero, it is generally nighttime operation. Users can determine whether the current heating capacity of the heat pump module meets the requirements based on the relationship between the return water temperature obtained by the temperature sensor 7 and the preset temperature. When the return water temperature is less than the preset temperature, users can increase the number of heat pump modules 3 that are turned on in order to meet the heating demand.

[0074] In this embodiment, a temperature sensor 7 is set to detect the return water temperature in real time, so that the user can keep track of the heating status of the heat pump system and adjust the number of heat pump modules in operation according to their heating needs.

[0075] In some embodiments, the first valve 61 and the second valve 62 are fluorinated solenoid valves. In this embodiment, setting the first valve 61 and the second valve 62 as fluorinated solenoid valves can withstand the pressure and chemical properties of the refrigerant, and has better corrosion resistance and sealing performance.

[0076] In some embodiments, the third valve 63 is a water solenoid valve. In this embodiment, setting the third valve 63 as a water solenoid valve can adapt to different working pressures and achieve precise control of the water flow in the pipeline.

[0077] In some embodiments, the heat pump module 3 has a first interface and a second interface, the first interface being used to connect to the supply device 1 pipeline and the second interface being used to connect to the storage device 2 pipeline.

[0078] In this embodiment, the heat pump module 3 only needs to be provided with two interfaces to connect to the supply device 1 and the storage device 2 respectively. Designers can flexibly configure the number of heat pump modules 3 according to user needs, thereby reducing the design cost of the heat pump system.

[0079] In some embodiments, the throttling element 33 is an electronic expansion valve. In this embodiment, the refrigerant flow rate can be adjusted with greater precision to improve the energy efficiency of the heat pump system.

[0080] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0081] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A heat pump system, characterized in that, include: The supply device (1) is configured to supply the medium to be heated; Storage device (2) is configured to store heated medium; and One or more heat pump modules (3), respectively connected to the supply device (1) and the storage device (2), are configured to heat the medium provided by the supply device (1), and the number of heat pump modules (3) is the ratio of the user's heat power demand to the heat output power of each heat pump module (3); Each heat pump module (3) includes a compressor (31), a condenser (32), a throttling element (33), and an evaporation assembly connected in sequence. The evaporation assembly includes an evaporator (34) and a photovoltaic thermal assembly (35) connected in parallel.

2. The heat pump system as described in claim 1, characterized in that, The number of photovoltaic thermal components (35) in each heat pump module (3) is one or more; The number of photovoltaic thermal components (35) in each heat pump module (3) is the ratio of the total heat exchange power required by the photovoltaic thermal components (35) to the heat exchange capacity of each photovoltaic thermal component (35), and the total heat exchange power required by the photovoltaic thermal components (35) is the difference between the heat output power of each heat pump module (3) and the power of the compressor (31).

3. The heat pump system as described in claim 1 or 2, characterized in that, The medium is a liquid; the heat pump system further includes: A liquid level sensor (4) is disposed in the storage device (2) and configured to acquire liquid level information in the storage device (2).

4. The heat pump system as described in claim 3, characterized in that, Also includes: A first valve (61) is disposed between the throttling element (33) and the evaporator (34) and is configured to switch the connection and disconnection of the pipeline between the throttling element (33) and the evaporator (34); and The second valve (62) is located between the throttling element (33) and the photovoltaic thermal module (35) and is configured to switch the on / off state of the pipeline between the throttling element (33) and the photovoltaic thermal module (35).

5. The heat pump system as described in claim 3, characterized in that, The condenser (32) of each of the heat pump modules (3) is connected in parallel with the storage device (2) and the supply device (1); The heat pump system also has one or more third valves (63), which are located between the supply device (1) and the condenser (32) and are configured to switch the supply line on and off.

6. The heat pump system as described in claim 5, characterized in that, Also includes: A temperature sensor (7) is installed in the return water pipeline between the heat pump module (3) and the storage device (2) and is configured to obtain the return water temperature of the liquid delivered to the storage device (2).

7. The heat pump system as described in claim 4, characterized in that, The first valve (61) and the second valve (62) are fluorine solenoid valves.

8. The heat pump system as described in claim 5, characterized in that, The third valve (63) is a water solenoid valve.

9. The heat pump system as claimed in claim 1, characterized in that, The heat pump module (3) has a first interface and a second interface. The first interface is used to connect to the supply device (1) via a pipeline, and the second interface is used to connect to the storage device (2) via a pipeline.

10. The heat pump system as claimed in claim 1, characterized in that, The throttling element (33) is an electronic expansion valve.

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