CN210861302U - An adjustable heat storage solar heat pump combined heating system - Google Patents

Abstract

The utility model discloses an adjustable heat storage solar heat pump combined heating system. The heat pump circulation system of the utility model is composed of a compressor, a condenser, a filter, an expansion valve, an evaporator and a gas-liquid separator which are connected in sequence; The heat-carrying solvent outlet of the heat-storage tank is connected to the heat-carrying solvent pipeline of the condenser and the circuit 1 of the second check valve in turn, and the heat-carrying solvent outlet of the heat-storage tank is connected to the evaporator through the pipeline of the stop valve. The heat-carrying solvent pipeline and the circuit 2 provided with the check valve 3 are respectively connected to the heat-transmitting pipeline provided with the liquid pump, and the heat-transmitting pipeline is connected to the solar heat collecting panel. In the heat storage type solar heat pump combined heating system, the utility model utilizes the solar energy to the maximum extent, realizes heating and reduces heating energy consumption.

Description

An adjustable heat storage solar heat pump combined heating system

technical field

The utility model belongs to the field of solar heating, in particular to an adjustable heat storage type solar heat pump combined heating system.

Background technique

Traditional heating still relies on burning coal and oil, which is not only costly, but also causes environmental pollution and deepens ecological deterioration. To this end, people develop clean and cheap solar energy resources, so as to develop solar heating devices. However, there are still many shortcomings in the current solar heating device, and the loss of heat energy is large, resulting in heat waste.

Solar combined heat pump heating is a relatively rapidly developing form of heating, but due to the instability of solar energy, that is, solar energy is available during the day and not at night, sunny days and rainy days, resulting in insufficient and effective use of solar thermal energy. Therefore, in order to improve the utilization rate of solar energy, solar energy combined with phase change heat storage materials to minimize the heat loss of solar energy has become the mainstream form today. Therefore, it is expected to design a simple and efficient heating system using solar thermal energy.

Utility model content

The utility model is designed to solve the problems of uncertainty and instability of solar energy in the traditional solar heat pump system, aiming at reducing the heat loss of the solar energy to the maximum extent, and proposes an adjustable heat storage type solar heat pump combined heating system .

In order to achieve this purpose, the technical scheme of the present utility model is as follows:

An adjustable heat storage solar heat pump combined heating system, comprising a heat pump circulation system and a heat storage system, wherein the heat pump circulation system consists of a compressor, a condenser, a filter, an expansion valve, an evaporator and a gas-liquid separator connected in sequence The heat storage system includes a solar heat collector plate, a one-way valve, and a heat storage tank connected in sequence, and the heat-carrying solvent outlet of the heat-storage tank is connected to the heat-carrying solvent pipeline of the condenser in sequence, and a circuit with a second one-way valve is arranged. 1. The heat-carrying solvent outlet of the heat storage tank is connected to the heat-carrying solvent pipeline of the evaporator and the circuit 2 of the check valve 3 in turn through the pipeline provided with the cut-off valve. The heat pipeline, the heat supply pipeline is connected to the solar heat collector; the temperature sensor is arranged in the heat storage tank, and the low pressure end temperature sensor, the low pressure end pressure sensor and the high pressure end are respectively arranged at the inlet of the low pressure end and the outlet of the high pressure end of the compressor Temperature sensor, high pressure side pressure sensor.

In addition, the evaporator has two heat exchange pipes arranged inside it, which take the refrigerant and the heat-carrying solvent respectively; the condenser is also arranged with two heat-exchange pipes, which take the refrigerant and the heat-carrying solvent respectively;

In addition, the heat-carrying solvent is stored in the heat-storage tank for use by buildings and users at any time; the heat-storage phase-change material with the heat-storage capacity greater than the heat-carrying solvent is arranged in the heat-storage tank, and the heat-storage phase change material can be cylindrical The arrangement in the tank can be in the shape of a cube, or in any regular or irregular shape, and the arrangement in the tank in the form of a cube is taken as an example.

The temperature sensor is arranged in the heat storage tank to monitor whether the solar heating alone can meet the requirements of buildings and users, and to feed back the appropriate time for the heat pump system to be turned on; There are temperature and pressure sensors everywhere to monitor the compression ratio of the compressor and avoid compressor failure.

An antifreeze component is added to the heat-carrying solvent, which has no corrosive effect on equipment and piping systems; the heat-carrying solvent is a liquid with a heat exchange capacity greater than that of water.

The refrigerant adopts a new type of environmentally friendly refrigerant R410A, the working pressure is higher than that of ordinary Freon refrigerant, and the heating efficiency is higher. The compressor is an inverter compressor.

The utility model relates to an adjustable heat storage type solar heat pump combined heating system, which has the beneficial effects that: in the heat storage type solar heat pump combined heating system, the solar energy is utilized to the maximum extent, and heating is realized while reducing heating energy consumption. .

Description of drawings

FIG. 1 is a schematic structural diagram of an adjustable thermal storage solar heat pump combined heating system of the present invention.

Detailed ways

An adjustable heat storage type solar heat pump combined heating system of the present invention will be further described in detail below through specific embodiments in conjunction with FIG. 1 .

As shown in Figure 1, the direction indicated by the arrow is the direction of liquid flow;

The heat pump circulation system is used to increase the low-grade heat energy to a high-grade heat energy that can be utilized. It consists of a compressor 1, a condenser (indoor unit) 2, a filter 3, an expansion valve 4, an evaporator connected in sequence (outdoor unit) 5 and gas-liquid separator 6 are composed; on the one hand, the evaporator 5 is used to absorb part of the heat-carrying solvent from the solar thermal energy stored by the solar heat collector plate 7, thereby improving the performance of the heat pump; The evaporator 5 is connected to the low-pressure end of the compressor 1 through a gas-liquid separator 6; the gas-liquid separator 6 is used for the gas-liquid separation of the refrigerant to prevent the refrigerant liquid from entering the compressor 1; the compressor 1 compresses The refrigerant is high temperature and high pressure refrigerant superheated steam, which provides power for the heat pump cycle; the condenser 2 is installed indoors for heating of buildings and users, and the inlet of the filter 3 is connected to the outlet of the condenser 2, The outlet of the filter 3 is connected to the expansion valve 4 of the heat pump system; the expansion valve 4 lowers the temperature and pressure of the refrigerant liquid condensed by the condenser 2 and sends it to the evaporator 5 to form a heat pump cycle.

The evaporator 5 has two heat exchange pipes arranged inside it, which carry the refrigerant and the heat-carrying solvent respectively; the condenser 2 is also arranged with two heat-exchange pipes, which carry the refrigerant and the heat-carrying solvent respectively;

The heat storage system includes a solar collector plate 7, a one-way valve 11, and a heat storage tank 8 connected in sequence. The first circuit of the valve 2 11, the heat-carrying solvent outlet of the heat storage tank 8 is connected to the heat-carrying solvent pipeline of the evaporator 5 and the circuit 2 of the check valve 3 13 in turn through the pipeline provided with the cut-off valve 10. The circuit 1 and the circuit The two are respectively connected to the heat supply pipes provided with the liquid pump 9, and the heat supply pipes are connected to the solar heat collecting panels. The solar collector plate 7 absorbs solar heat, transfers and stores the heat in the heat-carrying solvent, and the heat-carrying solvent is stored in the heat storage tank 8 for use by buildings and users at any time; the heat storage tank 8 is provided with A thermal storage phase change material whose thermal storage capacity is greater than that of the thermal storage solvent; during the day, when the user uses heat, the liquid pump 9 is turned on, and the solar thermal panel 7 sends the heat to the user area by means of the thermal storage solvent;

The temperature sensor T is arranged in the heat storage tank 8 to monitor whether the solar heating alone can meet the requirements of buildings and users, and feedback the appropriate time for the heat pump system to be turned on. If the temperature of the solution in the heat storage tank is lower than 30 ℃, open the shut-off valve 10 to provide low-grade heat energy for the heat pump; the low-pressure end inlet and the high-pressure end outlet of the compressor 1 are respectively provided with a low-pressure end temperature sensor, a low-pressure end pressure sensor, a high-pressure end temperature sensor, and a high-pressure end pressure sensor. The sensor is used to monitor the compression ratio of compressor 1 to avoid compressor 1 failure.

The heat-carrying solvent is added with an antifreeze component, which has no corrosive effect on equipment and pipeline systems; the heat-storage solvent is an environmentally friendly solvent; the heat-carrying solvent is a liquid with a heat exchange capacity greater than that of water ;

The refrigerant adopts a new type of environmentally friendly refrigerant R410A, the working pressure is higher than that of ordinary Freon refrigerant, and the heating efficiency is higher; the compressor 1 is a variable frequency compressor;

The adjustable thermal storage solar heat pump combined heating system can be divided into three modes to provide heating services to buildings and users: first, the thermal storage solar heating system alone; second, the heat pump heating system alone; third, the heat pump and thermal storage type solar combined heating system;

The first mode, that is, the thermal storage type solar heating system alone, includes: a solar collector panel 7, a thermal storage tank 8, a liquid pump 9, a one-way valve 11, a stop valve 10, and a connection to the thermal storage type solar energy separate heating system. Thermal storage solvent pipeline; when the system is working, close the shut-off valve 10, the solar heat collector plate transfers sunlight heat to the thermal storage solvent in the system, and the thermal storage solvent sends the heat to the building and users;

The second mode, that is, the heat pump heating system alone, includes: a compressor 1, an indoor unit 2, a filter 3, an expansion valve 4, an outdoor unit 5, a gas-liquid separator 6, and a refrigerant pipeline connected to the heat pump heating system; the system During operation, when the temperature in the heat storage tank 8 is lower than the set value of 30°C, the shut-off valve 10 is opened to provide low-grade heat energy for the heat pump;

The third mode, that is, a combined heat pump and thermal storage solar heating system, includes: a thermal storage solar heating system alone, a heat pump system, and a liquid pipeline connecting the two; In the heat-carrying solvent in the system, the heat is transferred in the heat-storage tank to the heat-storage phase change material with stronger heat-storage capacity. When the solar heat pump works together, a part of the heat-carrying solvent in the heat-storage tank is directly supplied to the heat-using area. The other part transfers the low-grade heat to the outdoor unit of the heat pump system, which is used to improve the performance of the heat pump.

The working principle of an adjustable regenerative solar heat pump combined heating system: when the building and users have heating needs during the day, if the heating area is within the solar heating capacity range, only the first mode can be turned on by the control system; if The heating area exceeds the range of solar heating capacity, and the third mode needs to be turned on through the control system; at night, the solar thermal panel 7 cannot serve the heating system again, and the temperature of the thermal storage solvent in the thermal storage tank 8 is lower than that of the phase. When the temperature of the material changes, the phase change material begins to release heat, and the combined heat pump system serves the heating of buildings and users.

Claims (3)

1. An adjustable heat storage type solar heat pump combined heating system is characterized in that, comprises a heat pump circulation system and a heat storage system, and the heat pump circulation system consists of a compressor, a condenser, a filter, an expansion valve, an evaporation The heat storage system includes a solar heat collector plate, a one-way valve, and a heat storage tank connected in sequence. In the circuit 1 of the check valve 2, the heat-carrying solvent outlet of the heat storage tank is sequentially connected to the heat-carrying solvent pipeline of the evaporator and the circuit 2 of the check valve 3 through the pipeline provided with the shut-off valve, and the circuit 1 and the circuit 2 are respectively connected. A heat supply pipeline is provided with a liquid pump, and the heat supply pipeline is connected to the solar heat collector plate; the temperature sensor is arranged in the heat storage tank, and the low pressure end temperature sensor and the low pressure end temperature sensor are respectively arranged at the inlet of the low pressure end and the outlet of the high pressure end of the compressor. end pressure sensor, high pressure end temperature sensor, and high pressure end pressure sensor. 2. The adjustable heat storage type solar heat pump combined heating system according to claim 1, wherein the heat-carrying solvent is stored in a heat-storage tank; the heat-storage tank is provided with a heat-storage capacity greater than that of the heat-carrying solvent Phase change material. 3 . The adjustable thermal storage solar heat pump combined heating system according to claim 2 , wherein the thermal storage phase change material is arranged in the tank in a cylindrical shape or in a cubic shape in the tank. 4 .

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