CN105157273A - Family type heat pump system with combined application of solar energy and soil source - Google Patents

Abstract

An embodiment of the present invention provides a household heat pump system in which solar energy and soil sources are combined. The system mainly includes: compressor and indoor heat exchange unit, solar heat collection and hot water heat storage unit, and soil source heat exchange unit. The solar heat collection and hot water heat storage unit and the soil source heat exchange unit are connected in parallel through an electromagnetic three-way reversing valve and then connected in series with the compressor and the indoor heat exchange unit. In the embodiment of the present invention, a heat pump circulation system is formed by integrating the compressor, the indoor heat exchange unit, the solar heat collection and hot water heat storage unit, and the soil source heat exchange unit, wherein the solar heat collection and hot water heat storage unit and the soil source The heat exchange unit is directly used as the evaporator or condenser in the heat pump system without intermediate heat exchange equipment. The power of the entire system cycle is provided by the heat pressure generated by the temperature difference between the compressor and the working medium in the system. The system is simple and reduces intermediate heat exchange losses. ,Energy efficient.

Description

A household heat pump system with combined application of solar energy and soil source

technical field

The invention relates to the technical field of indoor heating and air conditioning, in particular to a household heat pump system for combined application of solar energy and soil sources.

Background technique

Nowadays, the excessive use of fossil fuels such as coal mines, oil, and natural gas has caused a serious energy shortage, and the burning and utilization of these energy sources will cause more and more serious environmental pollution. When this energy will eventually be exhausted, This phenomenon will pose a serious threat to our human existence, so we should use renewable energy, such as solar energy, soil energy, wind energy, etc.

Because solar energy is greatly affected by the intensity of solar radiation, when the intensity of solar radiation is weak, cloudy or at night, solar energy cannot absorb heat for indoor heating, and single solar energy is limited here and cannot be used. However, a single ground-source heat pump air-conditioning system absorbs heat from the soil in winter and discharges heat into the soil in summer, so the amount of absorption or discharge is unbalanced, and the effect will become worse and worse for many years. Other single applications also have similar deficiencies.

Therefore, the heat pump system that combines solar energy and geothermal energy overcomes the above shortcomings. Patent CN204187754U discloses a combined air-conditioning system of solar heat pump and ground source heat pump. Patent CN201510175434 discloses a soil source solar heat pump greenhouse heating system and its control. method, the heat pump systems disclosed in these two patents are suitable for large-scale heat pump applications, and the system circulation is performed by solar energy and geothermal energy alternately with the evaporator or condenser in the heat pump system for heat exchange, not directly as the evaporator of the heat pump system or condenser.

The disadvantage of the systems disclosed in the above two existing patents is that another kind of fluid is required to carry energy for heat exchange with solar or geothermal energy, and the fluid flow carrying energy needs to be provided with a separate cycle power by a pump, which will make the system structure complicated , increasing the intermediate heat exchange equipment, the heat exchange efficiency is reduced.

Contents of the invention

The embodiment of the present invention provides a household heat pump system in which solar energy and soil sources are combined to realize the effective combination of solar heating and geothermal heating, and directly use solar heat collection equipment and geothermal heat exchange equipment as the core of the heat pump cycle system. The evaporator or condenser, the heat pump cycle power compressor or the thermal pressure generated by the system itself.

In order to achieve the above object, the present invention adopts the following technical solutions.

A household heat pump system for the joint application of solar energy and soil sources, including: a compressor and an indoor heat exchange unit, a solar heat collection and hot water heat storage unit, and a soil source heat exchange unit; the soil source heat exchange unit, solar collector The heat and hot water heat storage units are connected in parallel and then connected in series with the compressor and the indoor heat exchange unit, and each connection node is connected by an electromagnetic three-way reversing valve.

Preferably, the compressor and indoor heat exchange unit includes: a compressor, a four-way reversing valve, an indoor heat exchanger, a throttling device, a first electromagnetic three-way reversing valve and a second electromagnetic three-way reversing valve , the inlet and outlet of the compressor are connected to one outlet of the four-way reversing valve, and the other inlet and outlet of the four-way reversing valve are respectively connected to one end of the indoor heat exchanger and the second electromagnetic three The other end of the indoor heat exchanger is connected with the throttling device and the first electromagnetic three-way reversing valve in sequence.

Preferably, the solar heat collector is connected in parallel with the hot water storage tank.

Preferably, the solar heat collector includes an evaporative heat exchanger, a frame of an incubator, a backboard of an incubator, heat-absorbing fins, a temperature signal probe, and a transparent cover.

Preferably, the solar heat collection and hot water heat storage unit includes a solar heat collector, a hot water storage tank, a third electromagnetic three-way reversing valve and a fourth electromagnetic three-way reversing valve, and the solar heat collector . Both ends of the hot water storage tank are respectively connected to the third electromagnetic three-way reversing valve and the fourth three-way reversing valve.

Preferably, the soil source heat exchange unit includes: a soil buried pipe heat exchanger, the two ends of the soil buried pipe heat exchanger are respectively connected to the first electromagnetic three-way reversing valve, the second electromagnetic three-way connected to the reversing valve.

Preferably, the indoor heat exchanger is a fan coil, radiator or floor radiation heat exchanger.

Preferably, multiple fan coil units, radiators or floor radiation heat exchangers are connected in parallel.

From the technical solutions provided by the above embodiments of the present invention, it can be seen that the embodiment of the present invention integrates the compressor with the indoor heat exchange unit, the solar heat collection and hot water heat storage unit, and the soil source heat exchange unit. The heat and hot water heat storage unit and the soil source heat exchange unit are directly used as the evaporator or condenser in the heat pump system, and the working medium is continuously circulated by using the power of the compressor and the thermal pressure generated by the system itself, reducing the intermediate heat exchange equipment. Simplify the system and improve heat transfer efficiency.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description, or may be learned by practice of the invention.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a schematic diagram of the winter process and structure of a household heat pump system for combined application of solar energy and soil sources provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of the summer process and structure of a household heat pump system for combined application of solar energy and soil sources provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram of the summer process and structure of a household heat pump system for combined application of solar energy and soil sources provided by an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of a solar heat collector provided by an embodiment of the present invention.

Among them, 1 is the refrigeration compressor, 2 is the four-way reversing valve, 3 is the indoor heat exchanger; 4 is the electronic expansion valve, 5 is the first electromagnetic three-way reversing valve, 6 is the soil buried pipe heat exchanger, 7 is the second electromagnetic three-way reversing valve, 8 is the third electromagnetic three-way reversing valve, 9 is the solar collector, 10 is the fourth electromagnetic three-way reversing valve, 11 is the hot water storage tank, and 101 is the evaporation switch Heater, 102 is an incubator frame, 103 is an incubator backboard, 104 is a heat-absorbing fin, 105 is a temperature signal probe, and 106 is a transparent cover plate.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and/or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Additionally, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein explain.

In order to facilitate the understanding of the embodiments of the present invention, several specific embodiments will be taken as examples for further explanation below in conjunction with the accompanying drawings, and each embodiment does not constitute a limitation to the embodiments of the present invention.

In the application of small heat pump systems, such as the application of household heat pump systems, solar energy and geothermal heat can be combined and utilized without intermediate heat exchange devices, and solar heat exchange equipment and geothermal heat exchange equipment can be directly used as evaporators or condensers of the heat pump cycle system The thermal pressure generated by the compressor, the heat pump cycle power compressor or the system itself can simplify the system, reduce intermediate heat exchange losses, and achieve high efficiency and energy saving.

An embodiment of the present invention provides a household heat pump system for combined application of solar energy and soil sources. The system uses solar energy and soil sources in a reasonable manner, learns from each other, and adjusts appropriately. The embodiment of the present invention does not involve a water pump or a solution pump. The power of the heat pump cycle comes from the thermal pressure effect generated by the temperature difference between the compressor and the circulating working medium. Through a refrigerant circulating in the system, the soil or solar energy can be used to obtain heat in winter, so that The purpose of heating is realized at the user end, and in summer, the purpose of cooling the user end can be realized by using the soil or the hot water storage tank to dissipate heat. In this cycle, the use of solar heat collection in winter can avoid long-term excessive heat extraction from the underground soil, so that the soil source has enough time to restore the underground heat balance, and the use of the soil source also prevents the solar collector from absorbing heat in cloudy days or at night. The problem of no heat circulation is caused. In summer, the hot water storage tank or the soil heat exchanger is used to dissipate heat to ensure the reliable operation of the system every day. At the same time, a certain amount of domestic hot water is provided. The system is simple, efficient and energy-saving.

Detailed ways:

The working principle and system flow of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Please refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the embodiment of the present invention includes a heat pump system combining household solar energy and soil source, this system includes: compressor and indoor heat exchange unit, solar heat collection and hot water heat storage Unit, soil source heat exchange unit.

Compressor and indoor heat exchange unit, including compressor 1, four-way reversing valve 2, indoor heat exchanger 3, throttling device 4, first electromagnetic three-way reversing valve 5, second electromagnetic three-way reversing valve 7 and pipes connecting these devices. The inlet and outlet of the compressor 1 are connected to one outlet of the four-way reversing valve 2, and the other inlet and outlet of the four-way reversing valve 2 are respectively connected to one end of the indoor heat exchanger 3 and the second electromagnetic three-way reversing valve 7 (I The other end of the indoor heat exchanger 3 is connected with the throttling device 4 and the first electromagnetic three-way reversing valve 5 (I end) in sequence. The indoor heat exchanger 3 may be a fan coil unit, a radiator, or a floor radiant tube, and the fan coil unit, radiator and floor radiant heat exchange tubes may be connected in multiple ways in parallel.

The solar heat collection and hot water heat storage unit includes a solar heat collector 9, a hot water storage tank 11, a third electromagnetic three-way reversing valve 8 and a fourth electromagnetic three-way reversing valve 10; wherein the solar heat collector 9 includes an evaporation Heat exchanger 101 , incubator frame 102 , incubator back plate 103 , heat absorbing fins 104 , temperature signal probe 105 and transparent cover plate 106 .

The outlet of the solar heat collector 9 is connected to the fourth electromagnetic three-way reversing valve 10 (end I); the inlet of the solar heat collector 9 is connected to the third electromagnetic three-way reversing valve 8 (end II); the fourth electromagnetic three-way reversing valve The valve 10 (end III) is connected to the inlet of the hot water storage tank 11, and the outlet of the hot water storage tank 11 is connected to the third electromagnetic three-way reversing valve 8 (end III); thus the solar heat collector 9 and the hot water storage tank 11 constitute connected in parallel. The fourth electromagnetic three-way reversing valve 10 (end II) is connected to the second electromagnetic three-way reversing valve 7 (end III); the third electromagnetic three-way reversing valve 10 (end I) is connected to the first electromagnetic three-way reversing valve 5 (II end).

The soil source heat exchange unit includes a soil buried tube heat exchanger 6 . The outlet of the soil buried pipe heat exchanger 6 is connected to the second electromagnetic three-way reversing valve 7 (end II), and the inlet of the soil buried pipe heat exchanger 6 is connected to the first electromagnetic three-way reversing valve 5 (end III).

The solar heat collection and hot water heat storage unit and the soil source heat exchange unit are connected in parallel through an electromagnetic three-way reversing valve, and then connected in series with the compressor and the indoor heat exchange unit to integrate a solar energy and soil source joint application household type heat pump system.

The household heat pump system combined with solar energy and soil sources has different working modes in winter, summer and transitional seasons, and the refrigerant flow direction in the working process and system is also different. Combining the working modes of winter, summer and transitional seasons Analysis and description of the working process and principles:

The system cycle in winter is shown in Figure 1. The temperature of the working medium in the indoor heat exchanger 3 is higher than room temperature. At this time, the following three cycle modes (a), (b) and (c) can be executed according to the radiation intensity of the solar energy:

Mode (a): The heat pump heating mode in which solar heat collection is a low-temperature heat source, and this working cycle mode is suitable for the time when the solar radiation intensity is moderate. When the temperature output by the temperature signal probe 105 of the solar collector is between the preset high temperature and low temperature of the heating mode, the temperature signal probe 105 sends a signal to connect the first electromagnetic three-way reversing valve 5 (I→II), The second electromagnetic three-way reversing valve 7 (III → I), the third electromagnetic three-way reversing valve 8 (I → II), the fourth electromagnetic three-way reversing valve 10 (I → II), the heat pump cycle at this time It is a heat pump heating cycle in which the evaporative heat exchanger 101 in the solar heat collector 9 is directly used as a heat pump evaporator.

The flow process of this cycle is: the gas-liquid mixed working medium enters the evaporative heat exchanger 101 in the solar heat collector 9 to absorb solar heat and then becomes a low-temperature superheated gaseous state, and then flows through the fourth electromagnetic three-way reversing valve 10 (Ⅰ→ Ⅱ), the second electromagnetic three-way reversing valve 7 (Ⅲ→I), and the four-way reversing valve 2, enter the compressor 1 to be compressed, and become a high-temperature and high-pressure superheated gaseous working medium after compression, and the superheated gaseous working medium is then After flowing through the four-way reversing valve 2, it flows into the indoor heat exchanger 3 to exchange heat with the indoor air for indoor heating. The superheated gaseous working medium passes through the indoor heat exchanger 3 and condenses into a liquid working medium after heat exchange, and then flows through the throttling device After 4, it becomes a low-temperature and low-pressure gas-liquid two-phase working medium, and then flows through the first electromagnetic three-way reversing valve 5 (Ⅰ→Ⅱ), the third electromagnetic three-way reversing valve 8 (Ⅰ→Ⅱ) and enters the solar heat collector The primary cycle of the working fluid is completed in the evaporative heat exchanger 101 of the device 9, so that the continuous circulation realizes that the working fluid absorbs heat from the solar collector and becomes high temperature after being compressed, and releases heat to the room through the indoor heat exchanger to realize continuous heating purpose.

Mode (b): The parallel mode of ground source heat pump heating and solar collector heating, that is, heating + heating, this working cycle mode is suitable for the moment when the intensity of solar radiation is high. At this time, the weather is fine or the intensity of solar radiation is relatively high. When the temperature output by the temperature signal probe 105 of the solar collector is higher than the preset temperature upper limit of the heating mode, the temperature signal probe 105 sends a signal, and the first electromagnetic three-way switch is connected. Directional valve 5 (Ⅰ→Ⅲ), second electromagnetic three-way directional valve 7 (Ⅱ→Ⅰ), third electromagnetic three-way directional valve 8 (Ⅲ→Ⅱ) and fourth electromagnetic three-way directional valve 10 (Ⅰ →Ⅲ). At this time, the cycle of the system is two independent cycles, one is the heat pump heating cycle of the soil buried pipe heat exchanger 6 as the heat pump evaporator, and the other is the solar heat collector 9 as the heat source to heat the circulating water in the hot water storage tank 11 heating cycle.

The soil buried tube heat exchanger 6 is used as the heat pump heating cycle of the heat pump evaporator. This cycle is a cycle in which the soil buried tube heat exchanger 6 is used to replace the evaporative heat exchanger 101 in the solar heat collector 9 in mode (a), specifically The flow process is: the gas-liquid mixed working medium absorbs the low-temperature heat in the soil in the soil buried pipe heat exchanger 6 and becomes a superheated gaseous state, and the gaseous working medium flows through the second electromagnetic three-way reversing valve 7 (II→I), The four-way reversing valve 2 enters the compressor 1 and is compressed. After being compressed, it becomes a high-temperature and high-pressure superheated gaseous working medium, and then flows through the four-way reversing valve 2 and flows into the indoor heat exchanger 3 to exchange heat with indoor air for indoor use. Heating, after heat exchange in the indoor heat exchanger 3, the working fluid is condensed into a liquid state, flows through the throttling device 4, and becomes a low-temperature and low-pressure gas-liquid two-phase working medium, and flows through the first electromagnetic three-way reversing valve 5 (Ⅰ→Ⅲ ), enter the soil buried pipe heat exchanger 6, thus completing the primary cycle of the working fluid, such a continuous cycle, realize that after the working fluid absorbs a low-temperature heat source from the soil, it becomes high temperature after being compressed, and releases heat to the room through the indoor heat exchanger To achieve the purpose of continuous heating.

In the heat supply cycle in which the solar collector 9 is used as a heat source to heat the circulating water in the hot water storage tank 11, the flow power of the working medium depends on the thermal pressure generated by the temperature difference in the circulation pipeline, and the process is a low-temperature liquid working medium After entering the evaporative heat exchanger 101 in the solar heat collector 9, it absorbs solar energy and evaporates into a superheated gas with a higher temperature, and then flows through the fourth electromagnetic three-way reversing valve 10 (I→III) into the hot water storage tank 11, After heat exchange with the low-temperature circulating water in the hot water storage tank 11, it condenses into a liquid working fluid and flows out, and then flows through the third electromagnetic three-way reversing valve 8 (Ⅲ→Ⅱ) and then enters the evaporation exchange in the solar collector 9. The heater 101 circulates continuously in this way to realize the heat supply purpose of the working fluid absorbing solar energy from the solar heat collector 9 to heat the circulating water in the hot water storage tank 11 .

Mode (c): The heating mode of the ground source heat pump. This working cycle mode is when there is no sun, cloudy days or nights. When the temperature output by the temperature signal probe 105 of the solar collector is lower than the preset temperature lower limit of the heating mode, the temperature signal probe 105 sends a signal to connect the first electromagnetic three-way reversing valve 5 (Ⅰ→Ⅲ), the second Electromagnetic three-way reversing valve 7 (II → I), fourth electromagnetic three-way reversing valve 10 (I → III), third electromagnetic three-way reversing valve 8 (III → II), the cycle of the system now includes two Two independent cycles, one is the heat pump heating cycle of the soil buried pipe heat exchanger 6 as the heat pump evaporator, and the other is the working fluid antifreeze cycle between the solar collector 9 and the hot water storage tank 11.

The flow of the working medium in the heat pump heating cycle in which the soil buried pipe heat exchanger 6 is used as the heat pump evaporator is exactly the same as the working medium flow in the heat pump heating cycle in which the soil buried pipe heat exchanger 6 is used as the heat pump evaporator in mode (b).

The process and mode of the working fluid in the antifreeze cycle between the solar collector 9 and the hot water storage tank 11. The solar collector 9 in the mode (b) is used as a heat source to heat the circulating water in the hot water storage tank 11. The flow of the project in the cycle is exactly the same, but because the temperature difference of the working medium in the pipeline is small, the thermal pressure generated in the circulation pipeline is small, and the working medium fluid flows slowly in the pipeline, which cannot affect the temperature of the circulating hot water storage tank 11. The circulating water is heated, and the flow can only prevent the working fluid from freezing in the pipeline.

The system cycle in summer is shown in Figure 2, and the temperature of the working medium in the indoor heat exchanger 3 is lower than room temperature. At this time, the following two cycle modes (d) and (e) can be executed according to the radiation intensity of the solar energy:

Mode (d): The parallel mode of soil source cooling and solar collector heating, that is, cooling + heating, this working cycle mode is suitable for the time when there is sunshine during the day in summer. When the temperature output by the temperature signal probe 105 of the solar collector is higher than the preset temperature of this mode, the temperature signal probe 105 sends a signal, which is connected to the first electromagnetic three-way reversing valve 5 (Ⅲ→Ⅰ), the second electromagnetic three-way Pass reversing valve 7 (I→II), the third electromagnetic three-way reversing valve 10 (I→III), and the fourth electromagnetic three-way reversing valve 11 (III→II). At this time, the cycle of the system is two independent cycles, one is that the soil buried pipe heat exchanger 6 is used as the refrigeration cycle of the condenser of the refrigeration system, and the other is that the solar heat collector 9 is used as a heat source to heat the circulating water in the hot water storage tank 11 heating cycle.

The soil buried tube heat exchanger 6 is used as the refrigerating cycle of the condenser of the refrigeration system. Liquid working medium, the liquid working medium flows through the first electromagnetic three-way reversing valve 5 (Ⅲ→Ⅰ) and then enters the throttling device 4, where it is transformed into a low-temperature and low-pressure gas-liquid mixed working medium, which is absorbed after entering the indoor heat exchanger 3 The waste heat in the room cools the room, and the working fluid passes through the indoor heat exchanger 3 and evaporates from the gas-liquid mixture into superheated steam. After passing through the four-way reversing valve 2, it enters the inlet of compressor 1 and is compressed in compressor 1. It is a superheated gas with high temperature and high pressure. The superheated gas then flows through the four-way reversing valve 2 and the second electromagnetic reversing valve 7 (I → II) in sequence, and enters the soil buried pipe heat exchanger 6 to complete the primary cycle of the working fluid. Such a reciprocating cycle realizes that after the working medium absorbs the low-temperature heat source from the room, it becomes high temperature after compression, and releases heat to the soil through the soil buried tube heat exchanger to achieve the purpose of cooling the room.

The heating cycle in which the solar thermal collector 9 is used as a heat source to heat the circulating water in the hot water storage tank 11, and the heating cycle in which the solar thermal collector 9 in mode (b) is used as a heat source to heat the circulating water in the hot water storage tank 11 totally agree.

Mode (e): the mode in which the hot water storage tank 11 is used as the refrigeration cycle of the condenser of the refrigeration system. This working cycle mode is suitable for cloudy days or nights when there is no sun during the day in summer. When the temperature output by the temperature signal probe 105 of the solar collector is lower than the condensation temperature of the refrigeration cycle, the temperature signal probe 105 sends a signal to connect the first electromagnetic three-way reversing valve 5 (II → I), the second electromagnetic three-way Reversing valve 7 (I→III), third electromagnetic three-way reversing valve 8 (III→I) and fourth electromagnetic three-way reversing valve 10 (II→III).

This cycle is similar to the process in which the soil buried tube heat exchanger 6 is used as a high-temperature heat source to carry out the refrigeration cycle in mode (d), the difference is that the soil buried tube heat exchanger 6 is replaced by the hot water storage tank 11 as the condenser of the refrigeration cycle, The specific process is: the high-temperature and high-pressure superheated steam working medium compressed by the compressor 1 enters the hot water storage tank 11 for heat exchange with circulating water, and then condenses into a liquid working medium, and the liquid working medium flows through the third electromagnetic three-way commutation in turn After the valve 8 (Ⅲ→Ⅰ), the first electromagnetic three-way reversing valve 5 (Ⅱ→Ⅰ), it enters the throttling device 4 to become a low-temperature and low-pressure gas-liquid mixed working medium. When it enters the indoor heat exchanger 3, it absorbs the indoor The waste heat refrigerates the room, and the working fluid passes through the indoor heat exchanger 3 and evaporates from the gas-liquid mixture into superheated steam, which flows through the four-way reversing valve 2 and then enters the inlet of compressor 1, where it is compressed to a high temperature. The high-pressure superheated gas then flows through the four-way reversing valve 2, the second electromagnetic reversing valve 7 (Ⅰ→Ⅲ), the third electromagnetic reversing valve 10 (II→Ⅲ), and enters the hot water storage tank 11 to complete the process. Such a reciprocating cycle realizes that the working medium absorbs a low-temperature heat source from the room, becomes high temperature through compression, and releases heat to the circulating water through the hot water storage tank 11 to realize the purpose of indoor cooling.

The processing flow of the excessive seasonal cycle is shown in Figure 3: the compressor, indoor heat exchange unit and soil source heat exchange unit stop running, and only the solar heat collector and hot water heat storage unit work to provide usable domestic hot water. It executes the (f) loop pattern:

Mode (f): The heating cycle mode in which the solar collector 9 serves as a heat source to heat the circulating water in the hot water storage tank 11. This working cycle mode is suitable for the time when indoor heating and cooling are not needed, and the heating can be performed according to the local climate conditions. period and air-conditioning period setting. In this mode, the fourth electromagnetic three-way reversing valve 10 (I→III) is connected, the third electromagnetic three-way reversing valve 8 (III→II) and the compressor stops working.

The flow process of this cycle is completely consistent with the heat supply cycle in which the solar heat collector 9 in (b) is used as a heat source to heat the circulating water in the hot water storage tank 11 .

The heat pump system with alternating solar energy and soil sources provided by the embodiments of the present invention has the following advantages:

1. The embodiment of the present invention integrates the compressor, the indoor heat exchange unit, the solar heat collection and hot water heat storage unit, and the soil source heat exchange unit, wherein the solar heat collection and hot water heat storage unit exchanges heat with the soil source The unit is directly used as the evaporator or condenser in the heat pump system without intermediate heat exchange equipment. The power of the entire system cycle is provided by the thermal pressure generated by the temperature difference between the compressor and the working fluid in the system. The system is simple, reducing intermediate heat exchange losses and high efficiency. energy saving.

2. It realizes continuous heating in winter and continuous cooling in summer, and can also provide a certain amount of domestic hot water throughout the year. It is an efficient circulation system, which is especially suitable for use in northern my country.

Those skilled in the art can understand that the accompanying drawing is only a schematic diagram of an embodiment, and the modules or processes in the accompanying drawing are not necessarily necessary for implementing the present invention.

It can be seen from the above description of the implementation manners that those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products can be stored in storage media, such as ROM/RAM, disk , CD, etc., including several instructions to make a computer device (which may be a personal computer, server, or network device, etc.) execute the methods described in various embodiments or some parts of the embodiments of the present invention.

Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device or system embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for relevant parts, refer to part of the description of the method embodiments. The device and system embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, It can be located in one place, or it can be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without creative effort.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of changes or modifications within the technical scope disclosed in the present invention. Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (8)

1. a family formula heat pump for solar energy and soil source use in conjunction, is characterized in that, comprising: compressor and indoor heat exchange unit, solar energy heating and hot water heat storage units, soil source heat exchange unit; Be connected in series with compressor and indoor heat exchange unit after described soil source heat exchange unit, solar energy heating and hot water heat storage units are connected in parallel, each connected node is all the connection of employing T-way change-over solenoid valve.

2. the family formula heat pump of solar energy according to claim 1 and soil source use in conjunction, it is characterized in that, described compressor and indoor heat exchange unit comprise: compressor, four-way change-over valve, indoor heat exchanger, throttling arrangement, first T-way change-over solenoid valve and the second T-way change-over solenoid valve, the turnover of described compressor is connected with a road exit port of described four-way change-over valve, another road exit port of described four-way change-over valve respectively with one end of described indoor heat exchanger, described second T-way change-over solenoid valve connects, the other end of described indoor heat exchanger successively with described throttling arrangement, described first T-way change-over solenoid valve connects.

3. the family formula heat pump of solar energy according to claim 1 and soil source use in conjunction, is characterized in that, described solar thermal collector and described heat storage water tank are connected in parallel.

4. the family formula heat pump of solar energy according to claim 3 and soil source use in conjunction, is characterized in that, described solar thermal collector comprises evaporating heat exchanger, incubator frame, incubator backboard, heat absorbing fins, temperature signal probe, transparent cover plate.

5. the family formula heat pump of solar energy according to claim 4 and soil source use in conjunction, it is characterized in that, described solar energy heating and hot water heat storage units comprise solar thermal collector, heat storage water tank, the 3rd T-way change-over solenoid valve and the 4th T-way change-over solenoid valve, and the two ends of described solar thermal collector, described heat storage water tank are connected with described 3rd T-way change-over solenoid valve, described 4th three-way diverter valve all respectively.

6. the family formula heat pump of solar energy according to claim 1 and soil source use in conjunction, it is characterized in that, described soil source heat exchange unit comprises: soil buried tube heat exchanger, and the two ends of described soil buried tube heat exchanger are connected with described first T-way change-over solenoid valve, described second T-way change-over solenoid valve respectively.

7. the family formula heat pump of solar energy according to claim 6 and soil source use in conjunction, is characterized in that, described indoor heat exchanger is fan coil, radiator or flooring radiation heat exchanger.

8. the family formula heat pump of solar energy according to claim 7 and soil source use in conjunction, is characterized in that, multiple described fan coil, radiator or flooring radiation heat exchanger are connected in parallel.