Ground source heat pump heat supply integrated portable device based on thermochemical energy storage

Abstract

A ground source heat pump heat supply integrated portable device based on thermochemical energy storage is characterized by comprising a main body shell, an evaporator, a heat pump assembly, a condenser and a hot water tank, the hot water tank is installed in an inner cavity of the main body shell, and one end of the hot water tank is connected with the condenser through a second circulating water pump; the heat supply device is characterized in that a condenser is arranged in the main machine shell, the condenser is connected with an evaporator through a heat pump assembly, and the evaporator is connected with a ground heat exchanger through a first circulating water pump. The heat supply device integrates the hot water tank, the heat pump assembly, the energy storage device and the electric control module into a whole and is installed in the main machine shell; during use, only other waste heat sources, terrestrial heat and tail ends need to be externally connected, and installation is easy and convenient; according to the heat supply device, heat can be extracted from terrestrial heat and other waste heat through the heat pump assembly, double-source complementary heat supply is supported, terrestrial heat is supplemented in summer or daytime, and efficient cross-seasonal heat storage is achieved.

Description

Technical Field

[0001] This utility model relates to the field of geothermal heating technology, and in particular to a lightweight integrated ground source heat pump heating device based on thermochemical energy storage suitable for use in rural residences. Background Technology

[0002] With the increasing demand for clean heating in rural areas of northern my country, the existing heating system faces numerous challenges. According to the "China Clean Heating Industry Development Report 2023," by the end of 2022, the total heating area in northern my country reached 23.8 billion square meters, but the penetration rate and effectiveness of clean heating in rural areas remain unsatisfactory.

[0003] Many households experience average temperatures of only 18 degrees Celsius during winter heating, and over half of rural households report poor heating performance after clean energy upgrades. The main problems include high operating costs, insufficient gas supply, and inadequate design. Ground source heat pumps are a clean heating technology and one of the currently promoted technologies. However, current equipment is incompatible with the capacity of individual rural households, and there is a mismatch between heat extraction and the user's energy supply, severely hindering the application of ground source heat pumps in rural residences.

[0004] In view of the above problems, a low-cost, high-efficiency, lightweight integrated ground source heat pump heating device based on thermochemical energy storage is designed. Utility Model Content

[0005] In view of the above-mentioned technical problems, this utility model provides a lightweight integrated ground source heat pump heating device based on thermochemical energy storage. The overall structure is lightweight and easy to install. It can effectively utilize geothermal energy and surrounding low-temperature waste heat sources, reduce operating costs, improve heating efficiency, and meet the clean heating needs of rural areas.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A lightweight, integrated ground-source heat pump heating device based on thermochemical energy storage is characterized by comprising a main shell, an evaporator, a heat pump assembly, a condenser, and a hot water tank. The hot water tank is installed within the inner cavity of the main shell. One end of the hot water tank is connected to the condenser via a second circulating water pump. The condenser is connected to the evaporator via the heat pump assembly. The evaporator is connected to a buried pipe heat exchanger via a first circulating water pump.

[0008] The heat pump assembly consists of a compressor, a four-way valve, and an expansion valve. The evaporator is connected to one interface of the condenser via the compressor and the four-way valve, and the other interface of the condenser is connected to the evaporator via the expansion valve.

[0009] Furthermore, the condenser is connected to a thermochemical energy storage unit, which is used to store mismatched heat with a capacity sufficient for one day's heat supply. This allows for heat extraction, heat release, and flexible replacement of the heat storage material.

[0010] Furthermore, the hot water tank is connected to the indoor heating system via a circulating water pump. The hot water tank stores heated water, ensuring that users can obtain a stable supply of hot water and hydraulic balance at the terminal at different times.

[0011] Furthermore, the evaporator can be connected to other heat sources, such as solar energy or domestic hot water, via connecting pipes.

[0012] Furthermore, the evaporator, heat pump assembly, and condenser are all electrically connected to an integrated control motherboard located inside the main casing, enabling integrated control of the electronic components.

[0013] The beneficial effects of this utility model are:

[0014] The heating device designed in this utility model integrates a hot water tank, a heat pump assembly, an energy storage device, and an electrical control module, all installed in the main casing. When in use, it only needs to be connected to other waste heat sources, geothermal energy, and terminals, making installation simple and convenient.

[0015] The heating device designed in this utility model can extract heat from geothermal and other waste heat through heat pump components, support dual-source complementary heating, and supplement geothermal heat in summer or during the day to achieve efficient cross-seasonal heat storage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the system circulation process of a lightweight device integrating ground source heat pump heating based on thermochemical energy storage according to this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of a lightweight, integrated ground source heat pump heating device based on thermochemical energy storage according to this utility model.

[0018] Figure 3 This is an installation diagram of a lightweight, integrated ground source heat pump heating device based on thermochemical energy storage, according to this utility model.

[0019] As shown in the figure: 1. Main shell, 2. Hot water tank, 3. Condenser, 4. Second circulating water pump, 51. Compressor, 52. Four-way valve, 53. Expansion valve, 6. Evaporator, 7. First circulating water pump, 8. Buried pipe heat exchanger, 9. Thermochemical energy storage unit, 100. Wire, 101. Indoor heating components. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0023] Example 1

[0024] As shown in the figure, a hot water tank 2 is installed in the inner cavity of the outer casing 1. One end of the hot water tank 2 is connected to the condenser 3 through the second circulating water pump 4. The condenser 3 is connected to the evaporator 6 through a heat pump assembly. The heat pump assembly consists of a compressor 51, a four-way valve 52, and an expansion valve 53. The evaporator 6 is connected to one interface of the condenser 3 through the compressor 51 and the four-way valve 52. The other interface of the condenser 3 is connected to the evaporator 6 through the expansion valve 53. The evaporator 6 is connected to the buried pipe heat exchanger 8 through the first circulating water pump 7. In addition, a thermochemical energy storage unit 9 is installed inside the outer casing 1, so that the condenser 3 is connected to the thermochemical energy storage unit 9. The thermochemical energy storage unit 9 is used to store mismatched heat, with a capacity that meets the heat supply for one day. It can realize heat extraction, heat release, and flexible replacement of heat storage materials.

[0025] The evaporator 6, heat pump assembly, and condenser 3 are all installed inside the main casing 1 and are electrically connected to the integrated control motherboard inside the main casing 1 for integrated control of these electronic components.

[0026] In addition, the evaporator 6 in the device designed in this utility model can also be connected to other heat sources, such as solar energy or domestic hot water.

[0027] Example 2

[0028] When using this utility model, after ground installation, it is only necessary to connect the evaporator 6 to the buried pipe heat exchanger 8, or connect it to other waste heat sources. In addition, the hot water tank 2 is connected to the indoor heating component 101 through a circulating water pump. The hot water tank 2 stores the heated water, ensuring that users can obtain a stable supply of hot water and hydraulic balance at the end at different times. The installation is simple and convenient.

[0029] In winter operation, heat energy is extracted from the soil using the buried pipe heat exchanger 8. This heat source is then fed into the heat pump assembly. The heat pump assembly works by compressing the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas using the compressor 51. This high-temperature, high-pressure gas then enters the condenser 3. In the condenser 3, the refrigerant exchanges heat with water, releasing heat to the water, which is then heated and stored in the hot water tank 2. Meanwhile, the refrigerant cools and liquefies in the condenser 3, then flows through the expansion valve 53. The expansion valve 53 reduces the refrigerant pressure, causing it to become a low-temperature, low-pressure gas. Subsequently, the low-temperature, low-pressure refrigerant enters the evaporator 6, where it absorbs the heat stored in the water tank and evaporates into gas, completing the heat transfer. This process is continuously repeated, ensuring the system can continuously provide stable heat. Furthermore, when local geothermal heat is insufficient, other low-grade waste heat sources, such as solar thermal or domestic hot water, can be flexibly incorporated.

[0030] Under summer operating conditions, high-temperature, high-pressure refrigerant gas is discharged from compressor 51 and enters condenser 3. In condenser 3, the refrigerant exchanges heat with the external environment, releasing heat. As the refrigerant releases heat, it gradually cools and condenses into a liquid, its temperature decreases, and its pressure remains high. Next, the liquid refrigerant flows through expansion valve 53. In expansion valve 53, the refrigerant changes from a high-pressure liquid state to a low-pressure liquid state, and some refrigerant may begin to evaporate, forming a low-temperature, low-pressure mixture. Subsequently, the low-temperature, low-pressure refrigerant enters evaporator 6. In evaporator 6, the refrigerant absorbs heat from the air inside the main casing 1, causing it to further evaporate and turn into a gas. This process lowers the temperature of the air inside the casing, achieving a cooling effect. Finally, the evaporated gas is returned to compressor 51, completing one cycle. The entire heat exchange process, through continuous circulation, achieves a cooling effect within the casing and also provides an efficient hot water supply to the system. Through the intelligent control system, users can flexibly adjust the operating status of each component according to actual needs to ensure optimal energy efficiency and comfort. In addition, the soil can be replenished with heat in the summer by using low-grade heat, such as solar energy, for re-irrigation.

[0031] This invention couples waste heat and soil heat energy into a dual-source complementary heating mode using a heat pump component. During summer or daytime, the system supplements geothermal energy through an intelligent control program, achieving efficient cross-seasonal heat storage.

[0032] In this invention, the thermochemical energy storage unit 9 is used to maintain a full-load state under normal circumstances. Only when the hot water tank 2 cannot provide heat will the heat release function of the thermochemical energy storage unit 9 be activated to provide heat to the user.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lightweight, integrated ground-source heat pump heating device based on thermochemical energy storage, characterized in that... It comprises a main shell, an evaporator, a heat pump assembly, a condenser, and a hot water tank. The hot water tank is installed in the inner cavity of the main shell. One end of the hot water tank is connected to the condenser through a second circulating water pump. The condenser is connected to the evaporator through the heat pump assembly. The evaporator is connected to the buried pipe heat exchanger through a first circulating water pump.

2. The portable ground source heat pump heating integrated device based on thermochemical energy storage according to claim 1, characterized in that... The heat pump assembly consists of a compressor, a four-way valve, and an expansion valve. The evaporator is connected to one interface of the condenser through the compressor and the four-way valve, and the other interface of the condenser is connected to the evaporator through the expansion valve.

3. A portable ground-source heat pump heating integrated device based on thermochemical energy storage as described in claim 1, characterized in that... The condenser is connected to the thermochemical energy storage unit.

4. A portable device integrating ground source heat pump heating based on thermochemical energy storage as described in claim 1, characterized in that... The evaporator, heat pump assembly, and condenser are all electrically connected to the integrated control mainboard located inside the main casing.

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