Energy-saving and environmentally friendly air source heat pump system

Abstract

The present invention provides an energy-saving and environment-friendly air source heat pump system, which belongs to the field of heat pump energy-saving technology, including: when the external environment temperature is higher than a preset value, the high-temperature refrigerant discharged by the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger; the low-temperature refrigerant discharged by the expansion valve enters the second heat exchanger and cools the medium in the second capillary network through the second heat exchanger to complete refrigeration. When the external environment temperature is lower than the preset value, the medium enters the second capillary network after completing the circulation in the first capillary network and completes the circulation in the second capillary network, and the medium finally flows back to the first capillary network to complete heating. In the case of cooling and heating, the temperature of the first capillary network is greater than the temperature of the second capillary network in the energy-saving and environment-friendly air source heat pump system provided by the present invention, which saves energy consumption and reduces power consumption on the basis of ensuring comfort.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat pump energy saving, and more specifically, relates to an energy-saving and environment-friendly air source heat pump system. Background Art

[0002] With the development of social economy, people's requirements for indoor comfort are constantly increasing. For traditional air conditioners, there are problems such as loss caused by temperature and humidity coupling, convection blowing feeling and noise. For floor heating, there are problems such as slow thermal response, high condensing temperature of heat pump units, and low energy efficiency. The capillary network air conditioning system is based on independent temperature and humidity control technology and long-wave radiation principle. It has the characteristics of uniform indoor temperature distribution, high heat exchange energy utilization rate, no blowing feeling, low noise, good comfort, etc., and its heat exchange medium can also use renewable energy as the heat exchange energy source, which is conducive to energy conservation and emission reduction, environmental protection and improving the energy efficiency of building air conditioning.

[0003] The capillary network air conditioning technology in the prior art is to introduce a refrigerant (cold water) or a heating agent (hot water) into the capillary network to perform radiation heat exchange with the indoor air through the radiation plate or plaster layer, thereby adjusting the indoor temperature. The radiation air conditioning system is becoming more and more popular due to its advantages such as low noise, good thermal comfort and energy saving. As the terminal of the radiation air conditioning system, the capillary network radiation plate has gradually become the international mainstream air conditioning terminal device.

[0004] However, in some occasions such as summer, the cooling effect can be achieved through the capillary network, but the entire heat pump consumes a lot of electricity at this time, and the temperature of the indoor floor is low at this time. Since the floor is in direct contact with the feet, the comfort is poor. Summary of the invention

[0005] The purpose of the present invention is to provide an energy-saving and environment-friendly air source heat pump system, aiming to solve the problem of high energy consumption and poor comfort of the heat pump system.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: to provide an energy-saving and environmentally friendly air source heat pump system, including:

[0007] The first capillary network is fixed under the ground, and the second capillary network is fixed in the wall;

[0008] When the external ambient temperature is higher than a preset value, the high-temperature refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger; the low-temperature refrigerant discharged from the expansion valve enters the second heat exchanger and cools the medium in the second capillary network through the second heat exchanger to complete refrigeration;

[0009] When the external ambient temperature is lower than a preset value, the refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger; after the medium completes the circulation in the first capillary network, it enters the second capillary network and completes the circulation in the second capillary network, and the medium finally flows back to the first capillary network to complete the heating.

[0010] In a possible implementation, the high-temperature refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger, including:

[0011] The domestic water is heated by the first heat exchanger to ensure that the heat dissipated into the room by the first capillary network is less than the heat absorbed by the second capillary network.

[0012] In a possible implementation, the high-temperature refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger, including:

[0013] A heat-conducting pipe is connected to the first heat exchanger, and the heat-conducting pipe extends to the area and the object contacted by the human body to increase the surface temperature of the area and the corresponding object.

[0014] In a possible implementation, the first heat exchanger is connected to a third heat exchanger; the water outlet end of the first capillary network is connected to the third heat exchanger, and the first heat exchanger, the first capillary network and the third heat exchanger form a circulation loop; the third heat exchanger is used to increase the temperature of the refrigerant discharged into the compressor through the medium in the first capillary network.

[0015] In a possible implementation, the medium enters the second capillary network after completing the circulation in the first capillary network and completes the circulation in the second capillary network, including:

[0016] A drainage tube is connected between the liquid outlet end of the first capillary network and the liquid inlet end of the second capillary network;

[0017] A flow guide tube is connected between the liquid outlet end of the second capillary network and the liquid inlet end of the first capillary network;

[0018] By controlling the control valves on the drainage tube and the guide tube, the first capillary network and the second capillary network can realize self-circulation, or a circulation can be formed between the first capillary network and the second capillary network.

[0019] In a possible implementation, the refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger, including:

[0020] The refrigerant discharged from the expansion valve is heated by the old air after heat exchange through the new air fan installed indoors.

[0021] In a possible implementation, the low-temperature refrigerant discharged from the expansion valve enters the second heat exchanger and cools the medium in the second capillary network through the second heat exchanger, including:

[0022] The fresh air fan guides the old air after heat exchange to the first heat exchanger through the air guide cover to cool the first heat exchanger.

[0023] In a possible implementation, the low-temperature refrigerant discharged from the expansion valve enters the second heat exchanger and cools the medium in the second capillary network through the second heat exchanger, including:

[0024] A cold storage tank is connected between the expansion valve and the compressor, and the refrigerant with a relatively high temperature is stored in the cold storage tank;

[0025] The cold storage tank is used to receive the low-temperature refrigerant discharged from the expansion valve and discharge the high-temperature refrigerant to the compressor.

[0026] In a possible implementation, a cold storage tank is connected between the expansion valve and the compressor, and the cold storage tank stores the refrigerant with a relatively high temperature, including:

[0027] The medium of the second capillary network is cooled by the refrigerant stored in the cold storage tank.

[0028] In a possible implementation, the first heat exchanger is connected to a heat storage tank, and the first capillary network and the heat conducting pipe are both connected to the heat storage tank to export heat in the heat storage tank.

[0029] The beneficial effect of the energy-saving and environment-friendly air source heat pump system provided by the present invention is that: compared with the prior art, in the energy-saving and environment-friendly air source heat pump system of the present invention, the first capillary network is fixed under the ground, and the second capillary network is fixed in the wall. When the external environment temperature is higher than the preset value, refrigeration is required. At this time, the high-temperature refrigerant discharged by the compressor enters the first heat exchanger, and the high-temperature refrigerant heats the medium in the first capillary network through the first heat exchanger. The low-temperature refrigerant discharged by the expansion valve enters the second heat exchanger, and the second heat exchanger cools the medium in the second capillary network with the help of the low-temperature refrigerant.

[0030] When the external ambient temperature is lower than the preset value, heating is required. At this time, the refrigerant discharged from the compressor enters the first heat exchanger to heat the medium in the first capillary network through the first heat exchanger. After the medium completes the circulation in the first capillary network, it enters the second capillary network and completes the circulation in the second capillary network. The medium finally flows back to the first capillary network.

[0031] In the present application, the medium in the second capillary tube network and the first capillary tube network is treated accordingly by refrigerants of different temperatures through the expansion valve and the compressor, so that in the case of cooling and heating, the temperature of the first capillary tube network is greater than the temperature of the second capillary tube network, which saves energy and reduces power consumption while ensuring comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A flow chart of an energy-saving and environment-friendly air source heat pump system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] See also Figure 1 The energy-saving and environment-friendly air source heat pump system provided by the present invention is now described. The energy-saving and environment-friendly air source heat pump system comprises:

[0036] The first capillary network is fixed under the ground, and the second capillary network is fixed in the wall.

[0037] When the external ambient temperature is higher than the preset value, the high-temperature refrigerant discharged by the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger; the low-temperature refrigerant discharged by the expansion valve enters the second heat exchanger and cools the medium in the second capillary network through the second heat exchanger to complete the refrigeration.

[0038] When the external ambient temperature is lower than the preset value, the refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger; after the medium completes the circulation in the first capillary network, it enters the second capillary network and completes the circulation in the second capillary network, and the medium finally flows back to the first capillary network to complete the heating.

[0039] The beneficial effect of the energy-saving and environment-friendly air source heat pump system provided by the present invention is that: compared with the prior art, in the energy-saving and environment-friendly air source heat pump system of the present invention, the first capillary network is fixed under the ground, and the second capillary network is fixed in the wall. When the external environment temperature is higher than the preset value, refrigeration is required. At this time, the high-temperature refrigerant discharged by the compressor enters the first heat exchanger, and the high-temperature refrigerant heats the medium in the first capillary network through the first heat exchanger. The low-temperature refrigerant discharged by the expansion valve enters the second heat exchanger, and the second heat exchanger cools the medium in the second capillary network with the help of the low-temperature refrigerant.

[0040] When the external ambient temperature is lower than the preset value, heating is required. At this time, the refrigerant discharged from the compressor enters the first heat exchanger to heat the medium in the first capillary network through the first heat exchanger. After the medium completes the circulation in the first capillary network, it enters the second capillary network and completes the circulation in the second capillary network. The medium finally flows back to the first capillary network.

[0041] In the present application, the medium in the second capillary tube network and the first capillary tube network is treated accordingly by refrigerants of different temperatures through the expansion valve and the compressor, so that in the case of cooling and heating, the temperature of the first capillary tube network is greater than the temperature of the second capillary tube network, which saves energy and reduces power consumption while ensuring comfort.

[0042] In the air source heat pump hot water system, low-grade energy in the external environment is first absorbed through evaporation and heat absorption, and then released into the water after being pressurized and heated by the compressor. There are two heating methods for existing air source heat pump hot water systems: one-time heating and circulation heating. In one-time heating, cold water directly enters the main unit, is heated to the preset temperature once by the heat exchanger, and then enters the insulated water tank for storage or direct use. In circulation heating, cold water first enters the insulated water tank, and then is pumped back to the main unit for heating by the circulating water pump. Therefore, it is to pass the cold water into the main unit heat exchanger for multiple times and circulate and heat it to the preset temperature.

[0043] Air-energy water heaters are also called air source heat pump water heaters. Air-energy water heaters absorb low-temperature heat from the air, and after compression by the compressor, they are converted into high-temperature heat energy to heat the water. Air-energy water heaters are characterized by high efficiency and energy saving. They produce the same amount of hot water, and are more energy efficient than electric-assisted solar water heaters. This new product overcomes the shortcomings of solar water heaters that rely on sunlight for heating and are inconvenient to install. Since the air-energy water heater works through medium heat exchange, it does not require direct contact between the electric heating element and the water, avoiding the danger of leakage of electric water heaters, and also preventing the danger of explosion and poisoning of gas water heaters. It more effectively controls the air pollution caused by the exhaust gas of gas water heaters. Air-energy water heaters do not require sunlight, so they can be placed at home or outdoors. As long as there is air and the temperature is above zero degrees Celsius, the air-energy water heater can operate under pressure 24 hours a day. In this way, even if a tank of water is used up, another tank of hot water will be produced in about an hour or even less time. Therefore, it has many advantages such as high safety, high energy saving, long life, and no emission of toxic gases.

[0044] In daily life, domestic hot water above 45°C basically meets the demand, and the highest temperature of domestic hot water is generally within 60°C, while the highest temperature of drinking water may reach 100°C. In terms of total water volume, the daily consumption of domestic hot water generally does not exceed 200L / person, while the daily consumption of drinking water is generally 3L / person, so the total consumption of the two is quite different.

[0045] When the humidity is high, if the temperature of the coolant is too low, it will cause condensation on the cooling surface of the radiation panel or the plaster layer. If the condensation problem is solved by increasing the temperature of the coolant, there will be a problem of slow thermal response.

[0046] Capillary tube network radiation panels have outstanding advantages as the terminal of indoor air conditioning systems, but they also have their own limitations. Existing capillary tube network radiation panels are usually designed with the internal capillary tube network attached to the radiation surface of the radiation panel to ensure good heat conduction performance between the capillary tube network and the radiation surface, thereby ensuring the heating / cooling radiation efficiency.

[0047] However, such a structure makes the cooling temperature of the capillary network radiation plate in summer not too low. Too low cooling temperature will make the temperature of the radiation surface lower than the dew point temperature of the indoor air, and the water vapor in the indoor air will easily condense on the radiation surface, affecting the indoor sanitary conditions, which limits the cooling performance of the capillary network radiation plate. In winter, although there is no condensation problem, due to the limitation of radiation heating heat exchange efficiency and the requirement of comfort, the heating temperature should not be too high, because the radiation heat exchange efficiency of the capillary network radiation plate is limited. If the heating temperature is too high, a large amount of heat will accumulate in the radiation plate and it will not be easy to dissipate, which will accelerate the aging of the internal capillary circuit components, weaken the heat exchange performance of the capillary network, and shorten the service life.

[0048] The core of the air source heat pump is a compressor, and it also has a condenser, an expansion valve, an evaporator, etc. The principle of refrigeration is that the air source heat pump unit converts low-pressure refrigerant into high-temperature and high-pressure gas for discharge, and then transmits the high-temperature and high-pressure gas to the condenser. The heat will be transported to the water tank along with the copper pipe, so as to provide hot water or floor heating. The cooled refrigerant will become liquid and be transported to the evaporator by the expansion valve. Finally, under the action of the fan, the high-temperature gas from the outside will flow in the evaporator, and the energy in the air will also be absorbed by the evaporator, so that the temperature of the air will quickly cool down and finally form cold air. This repeated cycle can achieve an uninterrupted refrigeration effect.

[0049] The capillary network radiation panel is a terminal device of the air-conditioning system that is overall in the shape of a flat plate. It achieves the purpose of thermal radiation heating or cold radiation cooling to the surrounding environment by heating or cooling the internal capillary network. The media used for heating are mainly hot water, steam, gas, fuel oil, electricity, etc., and the media used for cooling are mainly cold water, evaporant, etc.

[0050] In summer, low-temperature water will flow into the capillary network. However, during cooling in summer, due to the high humidity in the south, condensation will often form on the walls during cooling. In the prior art, the flow rate and flow velocity control of the liquid in the traditional capillary network usually adopts a solenoid valve structure. When the liquid is greater than the set value, the solenoid valve is turned on, and when it is lower than the set value, the solenoid valve is closed. Since the solenoid valve has only two states, open and closed, the prior art cannot accurately control the flow rate and flow velocity of the liquid in the capillary network, resulting in a large temperature difference of the liquid, and the control cannot be intelligent, which easily causes indoor condensation.

[0051] When hot and cold air pass through the surfaces of objects with different temperatures, the uneven temperature field in the humid air causes the water vapor in the local air to reach the dew point temperature and condense into water droplets, which will cause condensation and dripping in the related parts of the air conditioner, which will have a bad impact on the user's daily life.

[0052] In some embodiments of the energy-saving and environment-friendly air source heat pump system provided in the present application, the high-temperature refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger, including:

[0053] The domestic water is heated by the first heat exchanger to ensure that the heat emitted by the first capillary network to the room is less than the heat absorbed by the second capillary network.

[0054] In order to avoid condensation, the prior art installs a fresh air system on the basis of the capillary tube, and sets a dehumidification device on the fresh air system, but the above method still cannot guarantee comfort. At the same time, in summer, under the action of the capillary network, the temperature of the indoor floor is low. If the human body directly touches the ground, the cool feeling will directly flow from the feet to the whole body, making the overall comfort low.

[0055] In order to solve this problem, in the present application, a second capillary network is arranged on the wall, and a first capillary network is buried on the ground.

[0056] The high-temperature and high-pressure refrigerant discharged by the compressor will first enter the first heat exchanger, where heat exchange medium is stored. The high-temperature refrigerant will heat the medium through coils, etc. The heated medium enters the first capillary network. Since the medium temperature in the first capillary network is relatively high and it is buried underground, it has the effect of warming the building ground.

[0057] The low-temperature refrigerant discharged from the expansion valve will enter the second heat exchanger, and the medium in the second capillary network will flow into the second heat exchanger. Since the refrigerant temperature is relatively low at this time, and the medium temperature in the second capillary network is relatively high, the heat is transferred from the medium to the refrigerant, and the temperature in the second capillary network decreases, thereby reducing the temperature of the wall, and finally reducing the temperature in the building through heat conduction.

[0058] Since the first heat exchanger is also used to heat domestic water, the heat radiation of the first capillary network will be less than the heat absorbed by the second capillary network, and the purpose of cooling is finally achieved. At the same time, since the first capillary network can radiate heat, the occurrence of exposure is avoided to a certain extent. At the same time, since the human feet touch the ground with a certain temperature, the comfort is relatively high.

[0059] In some embodiments of the energy-saving and environment-friendly air source heat pump system provided in the present application, the high-temperature refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger, including:

[0060] A heat-conducting pipe is connected to the first heat exchanger, and the heat-conducting pipe extends to the area and the object contacted by the human body to increase the surface temperature of the area and the corresponding object.

[0061] In traditional air conditioning systems, the heat is dissipated by the condenser. In order to accelerate the heat dissipation, a fan is installed on one side of the condenser to speed up the flow of air to speed up the heat transfer. However, it should be pointed out that the heat generated by the compressor will be lost to the outside through the above method, resulting in a waste of resources.

[0062] In this application, the first capillary network partially replaces the condenser, and the heat is transferred to the ground through the first capillary network, which avoids condensation on the one hand and improves comfort on the other hand. However, if the first capillary network radiates too much heat into the room, the cooling effect will be poor in summer. In order to solve this problem, part of the heat energy of the first heat exchanger will be transferred to the hot water tank for heating domestic water.

[0063] At the same time, in order to further improve comfort, a heat pipe is connected to the first heat exchanger, and the heat pipe is wrapped with heat insulation material. One end of the heat pipe is connected to the first heat exchanger, and the other end extends to an area that is easily touched in daily life. By connecting components such as a heat conduction network to the heat pipe, in the case of summer cooling, the problem of poor comfort caused by the low temperature of all indoor objects and contact with the human body is avoided.

[0064] For easier understanding, take a desktop as an example. In a traditional refrigeration system, the desktop itself does not generate heat, so the surface temperature is relatively low. At this time, the human body directly touches the table, which leads to poor comfort. However, by laying a heat conduction net on the table, the heat generated by the compressor is transferred to the table through the heat conduction pipe and the heat conduction net. Since the relative temperature is relatively high, there will be no cold feeling caused by the large temperature difference. At the same time, the heat dissipation of the table can reduce the temperature of the high-temperature and high-pressure refrigerant generated by the compressor.

[0065] In some embodiments of the energy-saving and environmentally friendly air source heat pump system provided in the present application, the first heat exchanger is connected to the third heat exchanger; the water outlet end of the first capillary tube network is connected to the third heat exchanger, and the first heat exchanger, the first capillary tube network and the third heat exchanger form a circulation loop; the third heat exchanger is used to increase the temperature of the refrigerant discharged into the compressor through the medium in the first capillary tube network.

[0066] In summer, the temperature of the medium in the first capillary network is increased by a compressor, and the medium is circulated in the first capillary network by a water pump or the like. When the medium circulates once in the first capillary network, part of the heat will be radiated outward.

[0067] Therefore, the second capillary network also needs to realize self-circulation, that is, a water pump also needs to be installed to enable the expansion valve to continuously cool the medium in the second capillary network.

[0068] In order to increase the temperature of the refrigerant entering the compressor, thereby reducing the power consumption of the compressor, a third heat exchanger is installed on the first heat exchanger in the present application, and the refrigerant discharged by the expansion valve flows into the third heat exchanger after being heated in the second heat exchanger. The third heat exchanger is connected to the first heat exchanger. The water inlet end of the first capillary network is connected to the first heat exchanger, and the water outlet end of the first capillary network is connected to the third heat exchanger.

[0069] The specific implementation method is that the medium in the first capillary network flows into the room after being heated by the first heat exchanger to ensure the temperature of the ground. After the medium returns in the first capillary, it will flow into the third heat exchanger. The third heat exchanger is used to heat the refrigerant before entering the compressor again, thereby avoiding the problem of low temperature of the refrigerant entering the compressor and saving energy. After passing through the third heat exchanger, the medium will flow into the first heat exchanger. Since the temperature will be greatly reduced after sufficient heat dissipation in the third radiator, the high-temperature refrigerant discharged by the compressor will be quickly cooled in the first radiator.

[0070] In some embodiments of the energy-saving and environment-friendly air source heat pump system provided in the present application, the medium enters the second capillary network after completing the circulation in the first capillary network and completes the circulation in the second capillary network, including:

[0071] The liquid outlet end of the first capillary network and the liquid inlet end of the second capillary network are connected with the drainage tube.

[0072] The liquid outlet end of the second capillary network and the liquid inlet end of the first capillary network are connected with the flow guide tube.

[0073] By controlling the control valves on the drainage tube and the flow guide tube, the first capillary network and the second capillary network can realize self-circulation, or a circulation can be formed between the first capillary network and the second capillary network.

[0074] In winter, the outdoor temperature is relatively low. In order to ensure comfort, it is also necessary to ensure that the second capillary network is also at a higher temperature than the outside temperature. In order to achieve the above-mentioned technical effects, it is necessary to connect the first capillary network with the second capillary network. The specific implementation method is that after the medium in the first capillary network is heated by the first heat exchanger, it is first turned back in the first capillary network, and after the turning back is completed, it enters the second capillary network through the drainage pipe. After the turning back is completed in the second capillary network, it is passed into the third heat exchanger through the guide pipe, thereby completing the cycle.

[0075] The above system does not involve an expansion valve, and the conversion from electrical energy to thermal energy is completed only by the compressor.

[0076] In some embodiments of the energy-saving and environment-friendly air source heat pump system provided in the present application, the refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger, including:

[0077] The new air fan installed indoors heats the refrigerant discharged from the expansion valve with the old air after heat exchange.

[0078] In order to ensure the cleanliness of indoor air in winter, a fresh air system will be installed in the building. The fresh air system can filter the outdoor air and discharge the filtered gas into the room. At the same time, in order to increase the temperature of the gas discharged into the room, the old air in the room will be heat exchanged.

[0079] Although improving the thermal conductivity of the material can enable a more complete heat exchange between the fresh air discharged into the room and the old air in the room, the heat will only be transferred from the higher temperature side to the lower temperature side. The best result of the heat exchanger is that the temperature of the fresh air and the old air is the same, which means that the old air, which is hotter than the outside temperature, will be directly discharged to the outside, causing waste.

[0080] In order to avoid the above problems, when the expansion valve is needed in winter, the refrigerant discharged from the expansion valve is led to the coil, which is connected between the expansion valve and the compressor, and is located at the exhaust port of the old air in the new air system, that is, the outdoor exhaust port of the total heat exchanger. The low-temperature refrigerant is heated by the old air, that is, part of the heat is recovered, and the heated refrigerant enters the compressor to complete the cycle.

[0081] In some embodiments of the energy-saving and environment-friendly air source heat pump system provided in the present application, the low-temperature refrigerant discharged by the expansion valve enters the second heat exchanger and cools the medium in the second capillary network through the second heat exchanger, including:

[0082] The new air fan guides the old air after heat exchange to the first heat exchanger through the air guide cover to cool the first heat exchanger.

[0083] In some occasions such as summer, the temperature of the first capillary network is higher than that of the second capillary network, and a fresh air system will be installed indoors. Since the temperature of the indoor gas is relatively low, if the lower temperature gas is directly discharged outdoors, it will lead to a waste of resources, and if the temperature of the first capillary network is too high, it will lead to poor cooling effect.

[0084] In order to solve this problem, an air guide hood is installed at the outdoor air outlet of the fresh air system. The air guide hood guides the lower temperature gas to the first heat exchanger, and cools the first heat exchanger by the low-temperature gas, thereby reducing the temperature of the first capillary network and improving the refrigeration effect.

[0085] In some embodiments of the energy-saving and environment-friendly air source heat pump system provided in the present application, the low-temperature refrigerant discharged by the expansion valve enters the second heat exchanger and cools the medium in the second capillary network through the second heat exchanger, including:

[0086] A cold storage tank is connected between the expansion valve and the compressor, and a relatively high temperature refrigerant is stored in the cold storage tank;

[0087] The cold storage tank is used to receive the low-temperature refrigerant discharged from the expansion valve and discharge the higher-temperature refrigerant to the compressor.

[0088] The result of using a capillary network for heating and cooling is that it takes a long time for the indoor temperature to reach the set state. More importantly, in order to ensure that the indoor temperature can reach the preset effect in winter, the heating capacity of the compressor needs to be heated. If the refrigerant discharged from the expansion valve cannot be effectively heated, the load on the compressor will increase, causing the electric energy to remain high.

[0089] In order to solve the above problem, a cold storage tank is connected to the liquid outlet of the expansion valve. The cold storage tank can store a certain amount of refrigerant, and the cold storage tank is connected to the compressor. When a relatively low-temperature refrigerant needs to be stored, the refrigerant can be guided to the cold storage tank through a control valve, and the cold storage tank will discharge the relatively high-temperature refrigerant stored therein to the compressor.

[0090] In some embodiments of the energy-saving and environment-friendly air source heat pump system provided in the present application, a cold storage tank is connected between the expansion valve and the compressor, and the cold storage tank stores a relatively high temperature refrigerant including:

[0091] The medium in the second capillary network is cooled by the refrigerant stored in the cold storage tank.

[0092] In winter, if the outdoor temperature is high, even if the power of the compressor is reduced, the indoor temperature may not change quickly. In order to ensure comfort, the medium in the second capillary network can be cooled by the refrigerant in the cold storage tank.

[0093] At other times in summer, even if the compressor is not turned on, the heat of the second capillary network is transferred to the cold storage tank through the heat pipe, so that the cooling effect can be achieved.

[0094] In some embodiments of the energy-saving and environment-friendly air source heat pump system provided in the present application, the first heat exchanger is connected to a heat storage tank, and the first capillary network and the heat conduction pipe are both connected to the heat storage tank for extracting the heat in the heat storage tank.

[0095] In daily use, if the compressor generates a lot of heat or the external ambient temperature is high, the excess high-temperature and high-pressure refrigerant can be stored in the heat storage tank. The heat storage tank can be connected to the heat pipe or used to heat the first capillary network. By setting up the heat storage tank, the indoor temperature can be kept constant even when the compressor is turned off.

[0096] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Energy-saving and environmentally friendly air source heat pump system, characterized in that: include: The first capillary network is fixed under the ground, and the second capillary network is fixed in the wall; When the external environment temperature is higher than a preset value, the high-temperature refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger; The low-temperature refrigerant discharged from the expansion valve enters the second heat exchanger and cools the medium in the second capillary network through the second heat exchanger to complete refrigeration; When the external ambient temperature is lower than a preset value, the refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger; after the medium completes the circulation in the first capillary network, it enters the second capillary network and completes the circulation in the second capillary network, and the medium finally flows back to the first capillary network to complete the heating; The high-temperature refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger, including: Heating domestic water by the first heat exchanger to ensure that the heat emitted by the first capillary network into the room is less than the heat absorbed by the second capillary network; The low-temperature refrigerant discharged from the expansion valve enters the second heat exchanger and cools the medium in the second capillary network through the second heat exchanger, including: A cold storage tank is connected between the expansion valve and the compressor, and the refrigerant with a relatively high temperature is stored in the cold storage tank; The cold storage tank is used to receive the low-temperature refrigerant discharged from the expansion valve and discharge the high-temperature refrigerant to the compressor; The cold storage tank is connected between the expansion valve and the compressor, and the cold storage tank stores the refrigerant with a relatively high temperature, including: The medium of the second capillary network is cooled by the refrigerant stored in the cold storage tank.

2. The energy-saving and environment-friendly air source heat pump system according to claim 1, characterized in that: The high-temperature refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger, including: A heat-conducting pipe is connected to the first heat exchanger, and the heat-conducting pipe extends to the area and the object contacted by the human body to increase the surface temperature of the area and the corresponding object.

3. The energy-saving and environment-friendly air source heat pump system according to claim 1, characterized in that: The first heat exchanger is connected to a third heat exchanger; the water outlet end of the first capillary network is connected to the third heat exchanger, and the first heat exchanger, the first capillary network and the third heat exchanger form a circulation loop; the third heat exchanger is used to increase the temperature of the refrigerant discharged into the compressor through the medium in the first capillary network.

4. The energy-saving and environment-friendly air source heat pump system according to claim 1, characterized in that: After the medium completes the circulation in the first capillary network, it enters the second capillary network and completes the circulation in the second capillary network, which includes: A drainage tube is connected between the liquid outlet end of the first capillary network and the liquid inlet end of the second capillary network; A flow guide tube is connected between the liquid outlet end of the second capillary network and the liquid inlet end of the first capillary network; By controlling the control valves on the drainage tube and the guide tube, the first capillary network and the second capillary network can realize self-circulation, or a circulation can be formed between the first capillary network and the second capillary network.

5. The energy-saving and environment-friendly air source heat pump system according to claim 1, characterized in that: The refrigerant discharged from the compressor enters the first heat exchanger and heats the medium in the first capillary network through the first heat exchanger, including: The refrigerant discharged from the expansion valve is heated by the old air after heat exchange through the new air fan installed indoors.

6. The energy-saving and environment-friendly air source heat pump system according to claim 5, characterized in that: The low-temperature refrigerant discharged from the expansion valve enters the second heat exchanger and cools the medium in the second capillary network through the second heat exchanger, including: The fresh air fan guides the old air after heat exchange to the first heat exchanger through the air guide cover to cool the first heat exchanger.

7. The energy-saving and environment-friendly air source heat pump system according to claim 2, characterized in that: The first heat exchanger is connected to a heat storage tank, and the first capillary network and the heat conducting pipe are both connected to the heat storage tank for exporting the heat in the heat storage tank.

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