CN107036155A - A kind of double heat source heat pump solar association heating system and method - Google Patents

Abstract

The present invention relates to a kind of double heat source heat pump solar association heating system and method, system includes double heat source heat pump unit, solar energy system and user-side device；The solar energy system is connected with user-side device, for converting the solar into heat energy, heats water source, heat energy is provided to user-side device；The double heat source heat pump unit is connected with user-side device, and with double heat source heat pump, for aiding in above-mentioned solar energy system, heat energy is provided for user-side device.The mode that the present invention heats by using double heat source heat pump with solar association solves air source heat pump and easily condensed in heating engineering, the low problem of heat exchange efficiency so that coal changes the tactful smooth of electricity.

Description

A dual heat source heat pump-solar combined heating system and method

technical field

The invention belongs to the field of household heating, in particular to a dual heat source heat pump-solar combined heating system and method.

Background technique

In recent years, the heating in northern cities has been better and better developed. However, the heating problem in rural areas in the north has been stagnant. Traditional coal stoves are still used for heating. The sanitation conditions are poor and the quality of life cannot be improved. Therefore, the key to rural heating is to seek a heating method that is suitable for rural areas and is energy-saving and environmentally friendly.

Combustion of fossil energy for heating in winter is one of the main causes of smog. Therefore, changing the traditional heating method in northern rural areas, "coal to electricity" is the only way to improve air quality. However, if electricity is used directly for heating, it would be a waste of resources to directly convert high-grade electricity into low-grade heat. Therefore, considering that some of the rural houses are heated by earth-coal stoves, the development of heat pump heating should be the best way to solve the heating problem in northern rural areas. In the north, the heat pump system with a single heat source will have a series of problems such as frosting and reduced operating efficiency due to the low temperature in deep winter. Therefore, it is necessary to make technical improvements to the heat pump system with a single heat source.

Contents of the invention

Aiming at the deficiencies in the prior art, the present invention proposes a dual heat source heat pump-solar combined heating system, which has the advantages of low energy consumption, high heating efficiency, energy saving and environmental protection.

The present invention adopts following technical scheme:

A dual heat source heat pump-solar combined heating system, including a dual heat source heat pump unit, a solar system, and a user-side device; the solar system is connected to the user-side device for converting solar energy into thermal energy, heating water, and providing Heat energy: the dual heat source heat pump unit is connected to the user-side device, and has a dual heat source heat pump for assisting the above-mentioned solar energy system to provide heat energy for the user-side device.

Further, the dual heat source heat pump unit includes a heat pump condenser, a heat pump compressor connected to one end of the heat pump condenser, and a heat pump expansion valve connected to the other end of the heat pump condenser; the heat pump compressors are respectively connected to the heat pump air through the first ball valve. source evaporation system, heat pump water source evaporation system, the heat pump expansion valve is also respectively connected to the heat pump air source evaporation system, heat pump water source evaporation system through the second ball valve.

Further, the first ball valve includes a ball valve V3 connected to the heat pump air source evaporation system and a ball valve V4 connected to the heat pump water source evaporation system.

Further, the second ball valve includes a ball valve V5 connected to the heat pump air source evaporation system and a ball valve V6 connected to the heat pump water source evaporation system.

Further, the heat pump air source evaporation system uses a heat pump air source evaporator, and the heat pump water source evaporation system uses a heat pump water source evaporator.

Further, the solar energy system includes a solar heat collector, a hot water storage tank, and a side coil of the water storage tank. The water in the tank stores heat and is stored in the heat storage tank to provide thermal energy for the user-side device.

Further, the hot water storage tank is also provided with a coil at the end side of the hot water storage tank.

Further, the control end of the heat pump condenser is connected to a first temperature control valve V1 and a ball valve V2, and the first temperature control valve V1 is connected to one end of the coil at the end side of the heat storage tank through a second temperature control valve V7 The ball valve V2 is connected to the other end of the end side coil of the heat storage tank through the ball valve V8; the control end of the heat pump water source evaporation system is connected to the heat storage tank through the ball valve V9 and the ball valve V10.

Further, the user-side device includes a water pipe, a fan coil system or a floor heating system.

The present invention also provides a technical solution, a dual heat source heat pump-solar combined heating method, which adopts a dual heat source heat pump-solar combined heating system, and the dual heat source heat pump-solar combined heating system includes a dual heat source heat pump unit, a solar system and The user-side device; the solar energy system is connected to the user-side device, and is used to convert solar energy into heat energy, heat the water source, and provide heat energy to the user-side device; To assist the above-mentioned solar energy system, provide thermal energy for the user-side device;

When the outdoor temperature is higher than the set value, the solar system is used to provide heat energy to the user-side device;

When the outdoor temperature is lower than the set value, the dual heat source heat pump unit is used to alternately provide heat energy to the user side device.

Work process of the present invention:

The present invention has five working states: the state of hot water production in sunny days, the state of hot water supply in cloudy days, the state of heating in early winter, the state of heating in mid-winter, and the state of heating in deep winter.

On sunny days, the sunlight is sufficient, and the solar heat collector 6 converts the energy absorbed from the sun into heat energy, and stores heat in the heat storage tank 7 through the side coil 8 of the heat storage tank and stores it in the water tank. The water supply pipe 11 supplies domestic hot water to users.

When continuous rainy weather occurs, only relying on solar energy to heat the hot water storage tank 7 cannot meet the user's domestic hot water demand, and the water source heat pump is used as an auxiliary heat source to heat the hot water storage tank to supply domestic hot water to the user. At this time, the first temperature control valve V1, ball valves V2, V4, V6, V9, V10 are opened; ball valves 14-V3, V5 are closed.

Heating state in early winter: when the indoor temperature is lower than 18°C and the temperature in the hot water storage tank is higher than 50°C, the outdoor temperature is not particularly low at this time, and the heat load required indoors is not high, and the hot water storage tank 7 can directly pass through the storage The coiled pipe 7 at the end of the hot water tank heats the room, and the indoor load can be fully borne by the hot water storage tank. At this time, the second temperature control valve V7 and the ball valve V8 are opened; the first temperature control valve V1 and the ball valves V2, V3, V4, V5, V6, V9, and V10 are closed.

Mid-winter heating state: when the indoor temperature is lower than 18°C, the temperature in the heat storage tank is lower than 50°C, and the outdoor temperature is higher than -5°C, the air source heat pump will automatically turn on and absorb the low-level heat energy in the ambient air. A small amount of electric energy is used to drive the compressor to run for heating, so as to meet the heating needs of rural houses in winter. At this time, the first temperature control valve V1, ball valves V2, V3, and V5 are opened; the first temperature control valve V7, ball valves V4, V6, V8, V9, and V10 are closed.

Heating state in deep winter: When the outdoor winter temperature is lower than -5°C, in view of the low temperature environment, the air source heat pump may have a series of problems such as frosting and reduced operating efficiency, and the heating effect is not good. Then open the valve first temperature control valve V1, ball valve V2, V4, V6, V9, V10; close the second temperature control valve V7, ball valve V3, V5, V8, so that the heat source of the heat pump is converted into the heat in the heat storage tank 10 Water, so that the heat pump unit can operate at a higher temperature, and then the refrigerant absorbs heat and evaporates at a relatively high temperature, improving the heating effect and ensuring the indoor temperature.

Beneficial effects of the present invention: while using clean energy, the present invention ensures the heating demand, improves the heating performance coefficient of the unit, improves the heat exchange efficiency, and ensures the hot water supply for users throughout the year. Through the combination of dual heat source heat pump and solar energy heating, the problem of easy condensation and low heat exchange efficiency of air source heat pump in heating engineering is solved, so that the strategy of coal to electricity can be carried out smoothly.

Description of drawings

Fig. 1 is a schematic structural diagram of a dual heat source heat pump-solar combined heating system of the present invention.

Fig. 2 is a schematic diagram a of the operating state of the dual heat source heat pump-solar combined heating system of the present invention.

Fig. 3 is a schematic view b of the operating state of the dual heat source heat pump-solar combined heating system of the present invention.

Fig. 4 is a schematic view c of the operating state of the dual heat source heat pump-solar combined heating system of the present invention.

Fig. 5 is a schematic view d of the operating state of the dual heat source heat pump-solar combined heating system of the present invention.

Fig. 6 is a schematic view e of the operating state of the dual heat source heat pump-solar combined heating system of the present invention.

detailed description:

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

A typical embodiment of the present invention is a dual heat source heat pump-solar combined heating system, including a dual heat source heat pump unit, a solar system, and a user-side device; the solar system is connected to the user-side device for converting solar energy into thermal energy for heating The water source provides heat energy to the user-side device; the dual-heat-source heat pump unit is connected to the user-side device, and has a dual-heat-source heat pump, which is used to assist the above-mentioned solar energy system to provide heat energy to the user-side device.

The dual heat source heat pump unit includes a heat pump condenser, a heat pump compressor connected to one end of the heat pump condenser, and a heat pump expansion valve connected to the other end of the heat pump condenser; the heat pump compressor is respectively connected to the heat pump air source evaporation system and the heat pump through the first ball valve In the water source evaporation system, the heat pump expansion valve is also respectively connected to the heat pump air source evaporation system and the heat pump water source evaporation system through the second ball valve. The heat pump air source evaporation system uses a heat pump air source evaporator, and the heat pump water source evaporation system uses a heat pump water source evaporator.

The first ball valve includes a ball valve V3 connected to the heat pump air source evaporation system and a ball valve V4 connected to the heat pump water source evaporation system.

The second ball valve includes a ball valve V5 connected to the heat pump air source evaporation system and a ball valve V6 connected to the heat pump water source evaporation system.

The solar energy system includes a solar heat collector, a hot water storage tank and a side coil of the water storage tank. The heat is stored and stored in the hot water storage tank to provide heat energy for the user-side device. The hot water storage tank is also provided with coils at the end of the hot water storage tank.

The control end of the heat pump condenser is connected with a first temperature control valve V1 and a ball valve V2, and the first temperature control valve V1 is connected with one end of the coil at the end side of the heat storage tank through a second temperature control valve V7; the ball valve V2 The other end of the coil pipe at the end side of the heat storage tank is connected through a ball valve V8; the control end of the heat pump water source evaporation system is connected with the heat storage tank through a ball valve V9 and a ball valve V10.

The user-side device can be a water pipe, a fan coil system or a floor heating system.

Yet another embodiment of the present invention is a heating method using a dual heat source heat pump-solar combined heating system, specifically, a dual heat source heat pump-solar combined heating system is used, and the dual heat source heat pump-solar combined heating system includes a dual heat source heat pump The unit, the solar system, and the user-side device; the solar system is connected to the user-side device for converting solar energy into heat energy, heating the water source, and providing heat energy to the user-side device; the dual-heat source heat pump unit includes a heat pump condenser connected to the The heat pump compressor at one end of the heat pump condenser is connected to the heat pump expansion valve at the other end of the heat pump condenser; the heat pump compressor is respectively connected to the heat pump air source evaporation system and the heat pump water source evaporation system through ball valve V3 and ball valve V4, and the heat pump expansion valve The heat pump air source evaporation system and the heat pump water source evaporation system are also connected respectively through the ball valve V5 and the ball valve V6;

The solar energy system has a heat storage tank, and the heat storage tank includes a side coil of the heat storage tank and a side coil with an end of the heat storage tank;

The control end of the heat pump condenser is connected to a first temperature control valve V1 and a ball valve V2, and the first temperature control valve V1 is connected to one end of the coil pipe at the end side of the heat storage tank through a second temperature control valve V7; The ball valve V2 is connected to the other end of the end side coil of the heat storage tank through the ball valve V8; the control end of the heat pump water source evaporation system is connected to the heat storage tank through the ball valve V9 and the ball valve V10;

As shown in Figure 2-6:

When the outdoor temperature is higher than the first set temperature, the solar energy system is used to heat the water source corresponding to the hot water making state in sunny days, and heat energy is provided to the user-side device. The solar heat collector 6 converts the energy drawn from the sun into heat energy, stores heat in the heat storage tank 7 through the solar-heat storage tank side coil 8 and stores it in the water tank, and passes through the domestic hot water supply pipe 11 Supply users with domestic hot water.

When the outdoor temperature is lower than the first set temperature and higher than the second set temperature, the corresponding continuous rainy weather occurs; when only relying on solar energy to heat the hot water tank 7 cannot meet the user's domestic hot water demand, the water source heat pump acts as The auxiliary heat source heats the hot water storage tank to supply domestic hot water to users. The first temperature control valve V1 and ball valves V2, V4, V6, V9, and V10 are opened; the ball valves V3 and V5 are closed.

When the outdoor temperature is lower than the second set temperature and higher than the third set temperature, corresponding to the early winter heating state, when the internal temperature is lower than 18°C and the temperature in the heat storage tank is higher than 50°C, the outdoor temperature at this time It is not particularly low, and the heat load required indoors is not high. The hot water storage tank 7 can directly heat the room through the hot water storage tank-end measuring coil 7, and the indoor load can be fully borne by only relying on the hot water storage tank. The heat storage tank provides heat energy to the user-side device through the heat storage tank-end measuring coil, the second temperature control valve V7 and ball valve 1V8 are opened; the first temperature control valve V1, ball valve 1V2, V3, V4, V5, V6, V9, V10 off.

When the outdoor temperature is lower than the third set temperature and higher than the fourth set temperature, corresponding to mid-winter heating state, the indoor temperature is lower than 18°C and the temperature in the heat storage tank is lower than 50°C, and the outdoor temperature is higher than When -5°C, the air source heat pump is automatically turned on. By absorbing the low-level heat energy in the ambient air, a small amount of electric energy is used to drive the compressor to run for heating, so as to meet the heating needs of the farm house in winter. The first temperature control valve V1, ball valve V2, V3 and V5 are turned on; the second temperature control valve V7 and ball valve 1V4, V6, V8, V9 and V10 are turned off.

When the outdoor temperature is lower than the fourth set temperature and higher than the fifth set temperature, it corresponds to the heating state in deep winter, and when the outdoor temperature is lower than -5°C in winter, the air source heat pump may appear knot in the low temperature environment. If the heating effect is not good, open the first type of temperature control valve V1, ball valve V2, V4, V6, V9, V10; close the first type of temperature control valve V7, ball valve V3, V5, V8, so that the heat source of the dual heat source heat pump unit is converted into hot water in the hot water storage tank, so that the dual heat source heat pump unit can operate at a higher temperature, and then the refrigerant absorbs heat and evaporates at a relatively high temperature, improving Heating effect to ensure indoor temperature.

The beneficial effect of the invention is that while using clean energy, the heating demand is guaranteed, the heating performance coefficient of the unit is improved, the heat exchange efficiency is improved, and the hot water supply for users is guaranteed throughout the year. Through the combination of dual heat source heat pump and solar energy heating, the problem of easy condensation and low heat exchange efficiency of air source heat pump in heating engineering is solved, so that the strategy of coal to electricity can be carried out smoothly.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

1. a kind of double heat source heat pump-solar association heating system, it is characterised in that：Including double heat source heat pump unit, solar energy System and user-side device；The solar energy system is connected with user-side device, for converting the solar into heat energy, heating Water source, heat energy is provided to user-side device；The double heat source heat pump unit is connected with user-side device, with double heat source heat pump, For aiding in above-mentioned solar energy system, heat energy is provided for user-side device.

2. system according to claim 1, it is characterised in that：The double heat source heat pump unit includes heat pump condenser, even The heat pump compressor of heat pump condenser one end is connected on, the heat pump expansion valve of the heat pump condenser other end is connected to；The heat pump pressure Contracting machine connects heat pump air-source vapo(u)rization system, heat pump water source vapo(u)rization system respectively by the first ball valve, and the heat pump expansion valve leads to Cross the second ball valve and also connect heat pump air-source vapo(u)rization system, heat pump water source vapo(u)rization system respectively.

3. system according to claim 2, it is characterised in that：First ball valve includes and heat pump air-source vapo(u)rization system The connected ball valve V3 and ball valve V4 being connected with heat pump water source vapo(u)rization system.

4. system according to claim 2, it is characterised in that：Second ball valve includes and heat pump air-source vapo(u)rization system The connected ball valve V5 and ball valve V6 being connected with heat pump water source vapo(u)rization system.

5. system according to claim 2, it is characterised in that：The heat pump air-source vapo(u)rization system uses heat pump air-source Evaporator, heat pump water source vapo(u)rization system uses heat pump water source evaporator.

6. system according to claim 2, it is characterised in that：The solar energy system includes solar thermal collector, accumulation of heat The energy of the sun is converted into heat energy by water tank and hot water storage tank side panel pipe, solar thermal collector, passes through hot water storage tank side panel pipe Storage heat is carried out to the water in hot water storage tank and is stored among the hot water storage tank, heat energy is provided for user-side device.

7. system according to claim 6, it is characterised in that：The hot water storage tank is additionally provided with hot water storage tank end side panel Pipe.

8. system according to claim 7, it is characterised in that：The control end of the heat pump condenser is connected with the first temperature control Valve V1 and ball valve V2, the first temperature-sensing valve V1 are connected by the second temperature-sensing valve V7 with one end of hot water storage tank end side coil pipe； The ball valve V2 is connected by ball valve V8 with the other end of hot water storage tank end side coil pipe；The control of heat pump water source vapo(u)rization system End processed is connected by ball valve V9 and ball valve V10 with hot water storage tank.

9. system according to claim 1, it is characterised in that：The user-side device includes water-supply-pipe, fan unit piping System or ground heating system.

10. a kind of double heat source heat pump based on claim 1-solar association heating method, it is characterised in that：Using double thermals source Heat pump-solar association heating system, the double heat source heat pump-solar association heating system include double heat source heat pump unit, Solar energy system and user-side device；The solar energy system is connected with user-side device, for converting the solar into heat Can, water source is heated, heat energy is provided to user-side device；The double heat source heat pump unit is connected with user-side device, with double heat Source heat pump, for aiding in above-mentioned solar energy system, heat energy is provided for user-side device；

When outdoor temperature is higher than setting value, heat energy is provided to user-side device using solar energy system；

When outdoor temperature is less than setting value, alternately heat energy is provided to user-side device using double heat source heat pump unit.