CN102221270B - Heat pump set and solar energy linked cold, warm and domestic hot water supply device - Google Patents

Abstract

A heat pump unit and solar energy linkage cold and warm and domestic hot water supply device comprises a main heat pump unit, a heat preservation water tank, a domestic water heat exchanger, a cold and hot buffer water tank and a control device, wherein an indoor heat exchanger of the main heat pump unit is communicated with the heat preservation water tank and the cold and hot buffer water tank through an electric three-way valve, and the cold and hot buffer water tank is communicated with a plurality of load tail end radiators through a water supply pump; one end of the overflow pipe is communicated with the cold and hot buffer water tank, and the other end of the overflow pipe is communicated with a water return pipe of the radiator; the water outlet pipe of the indoor heat exchanger of the auxiliary heat pump unit is communicated with the cold and hot buffer water tank, and the joint of the water return pipe and the water return pipe of the radiator and the overflow pipe is communicated. With such a structure. The heat pump and the solar energy can be utilized to supply cold and heat as well as domestic hot water with the highest efficiency.

Description

A cooling and heating and domestic hot water device linked by a heat pump unit and solar energy

technical field

The invention relates to a heat pump unit and solar energy linkage device, in particular to a heat pump unit and solar energy linkage heating and cooling and domestic hot water supply device.

Background technique

At present, there is a heat pump unit and solar energy linkage cooling and heating and domestic hot water device, including a heat pump unit, a solar collector, an insulated water tank, a control device, and a load end radiator. The heat pump unit includes a DC frequency conversion outdoor unit, an indoor The heat exchanger, the indoor heat exchanger supplies cooling or heating to the radiator at the end of the load through the water supply pump; the solar collector stores the solar heat energy in the thermal water tank for domestic hot water. The existing problems are: heat pumps can only supply domestic hot water, or only cooling and heating, solar energy can only provide domestic hot water or only heating, and it is impossible to achieve that solar energy can provide both domestic hot water and heating. It can provide cooling and heating as well as domestic hot water, and it is impossible to allocate corresponding heat pump units and solar collectors according to the proportion of cooling, heating and domestic hot water loads, which is not optimal in practical applications. energy-saving effect.

Contents of the invention

The object of the present invention is to provide a cooling and heating and domestic hot water device in which a heat pump unit is linked with solar energy, so that solar energy can supply both domestic hot water and heat, and can also make full use of air energy.

A cooling, heating and domestic hot water device linked by a heat pump unit and solar energy, including a main heat pump unit, an insulated water tank, a domestic water heat exchanger, a cold and hot buffer water tank, and a control device; the insulated water tank has a system replenishment pipe for heat exchange with domestic water The device is set in the heat preservation water tank;

The main heat pump unit includes a heat pump outdoor unit and an indoor heat exchanger. The indoor heat exchanger includes an insulation box, a circulating water pump and a water-refrigerant heat exchanger; The hot buffer water tank is connected, and the cold and hot buffer water tank is connected with several radiators at the load end through the water supply pump, and supplies cooling or heat to the radiator at the load end; its special feature is that it also includes a solar heat collector, a solar thermal Transfer device, an overflow pipe and one or more auxiliary heat pump units,

The solar heat collecting device comprises a solar heat collector and a solar circulating water pump; the solar heat collector is connected with the heat preservation water tank through the solar circulating water pump to form a circulating pipeline;

The solar thermal energy transfer device is connected between the thermal insulation water tank and the cold and hot buffer water tank; one end of the overflow pipe is connected with the cold and hot buffer water tank, and the other end is connected with the intersection of the return pipe of the radiator and the return pipe of the indoor heat exchanger;

The outlet pipe of the indoor heat exchanger of the auxiliary heat pump unit is connected with the cold and hot buffer water tank, and the return pipe is connected with the intersection of the return pipe and the overflow pipe of the radiator.

The cooling and heating and domestic hot water device linked by a heat pump unit and solar energy is special in that: the solar thermal energy transfer device includes a temperature sensor, a second water pump and an electric two-way valve, and the temperature sensor is arranged in the thermal insulation water tank Inside;

The second water pump and the electric two-way valve communicate with the heat preservation water tank and the cold and hot buffer water tank through pipelines, and the return water pipe of the first heat preservation water tank communicates with the return water pipe of the indoor heat exchanger of the main heat pump unit.

The utility model relates to a cooling and heating device and a domestic hot water device linked by a heat pump unit and solar energy. Due to the adoption of such a structure, and the solar energy uses the excess heat energy for heating under the condition that the domestic hot water is given priority; the heat pump unit can both supply Cold heating can also provide domestic hot water, and the solar energy that has surplus to domestic hot water is given priority to during heating; even in rainy days when solar energy is insufficient, heat pumps can be used to provide sufficient hot water, and it can be used for cooling and heating and domestic heat. The proportion of the water load is used to allocate the corresponding heat pump unit and solar collector, so as to achieve the best energy-saving and environmental protection effect in cooling, heating and domestic hot water. Heat pumps and solar energy can be used with the highest efficiency for cooling, heating and domestic hot water.

Description of drawings

Figure 1 is a schematic diagram of the present invention.

FIG. 2 is a partially enlarged view of FIG. 1 .

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Fig. 1 and Fig. 2, a cooling and heating and domestic hot water device linked by a heat pump unit and solar energy includes a main heat pump unit 1A, a thermal insulation water tank 2, a domestic water heat exchanger 3, a cold and hot buffer water tank 13, and a solar collector The heat device 6 and the control device, the main heat pump unit 1A includes a heat pump outdoor unit 11 and an indoor heat exchanger 12, and the indoor heat exchanger 12 includes a circulating water pump 121 and a water-refrigerant heat exchanger 122; the indoor heat exchanger of the main heat pump unit 1A The outlet pipe of 12 is connected to the inlet of the electric three-way valve 7, the first water outlet 71 of the electric three-way valve 7 is connected to the heat preservation water tank 2, and the water return pipe from the heat preservation water tank 2 to the return water port of the indoor heat exchanger 12, the electric three-way The second water outlet 2 of the valve 7 is connected to the cold and hot buffer water tank 12; the return pipe of the radiator 10 is connected with the return pipe of the indoor heat exchanger 12 of the main heat pump unit 1A;

It also includes the auxiliary heat pump unit 1B and an overflow pipe 8, one end of the overflow pipe 8 communicates with the return pipe of the radiator 10, and the other end communicates with the cold and hot buffer water tank 13;

The outlet pipe of the indoor heat exchanger 12 of the auxiliary heat pump unit 1B is connected to the cold and hot buffer water tank 13, and its return pipe communicates with the junction of the overflow pipe 8 and the return pipe of the radiator 10; the cold and hot buffer water tank 13 passes through the water supply pump 4. Supply cooling or heating to several load end radiators 10. There can be one auxiliary heat pump unit 1B, or more than two auxiliary heat pump units 1B; when more than two auxiliary heat pump units 1B are installed, the outlet pipes and inlet pipes of the indoor heat exchanger 12 of the auxiliary heat pump unit 1B are connected in parallel.

The return pipes of the indoor heat exchanger 12 of the main heat pump unit 1A and the auxiliary heat pump unit 1B are connected in parallel; with this structure, the main heat pump unit 1A can be used for cooling, heating and domestic hot water, and the auxiliary heat pump unit 1B is only used for cooling and supply. Heat, so as to avoid the energy loss caused by unnecessary cold and hot switching when the whole equipment meets the demand of cooling, heating and living heat.

The function of the overflow pipe 8 is that when the flow rate of the water supply pump 4 changes, it has almost no influence on the circulating water pump 121 of the indoor heat exchanger 12, thus not affecting the efficiency of the heat pump unit.

A system replenishment pipe 21 is arranged on the thermal insulation water tank 2 , and the domestic water heat exchanger 3 is arranged in the thermal insulation water tank 2 . The solar heat collecting device 6 comprises a solar heat collector 61 and a solar energy circulating water pump 62; the solar energy circulating water pump 62 is connected into a circulation pipeline between the thermal insulation water tank 2 and the solar thermal collector 61, and the solar thermal energy is stored in the thermal insulation water tank 2, and the solar energy The solar thermal energy stored in the heat collector 61 is stored in the thermal insulation water tank. The domestic water absorbs heat from the thermal insulation water tank 2 through the domestic water heat exchanger 3 to become domestic hot water;

As a further improvement: there is a thermal energy transfer device 9 between the thermal insulation water tank 2 and the cold and hot buffer water tank 13, the thermal energy transfer device 9 includes a temperature sensor 91, a second water pump 92, and an electric two-way valve 93, and the temperature sensor 91 is arranged in the thermal insulation water tank , used to sense whether the solar energy is sufficient; the second water pump 92 and the electric two-way valve 93 connect the heat preservation water tank and the cold and hot buffer water tank through the pipeline, and when the temperature sensor 91 judges that the solar energy is sufficient to meet the domestic hot water, the second water pump is turned on. The water pump 92 and the electric two-way valve 93 transfer the solar heat energy in the thermal insulation water tank to the cold and hot buffer water tank, and exchange heat with the cold and hot buffer water tank 13, the overflow pipe 8, the return pipe of the indoor heat exchanger 12, the thermal insulation water tank 2 and the indoor The water return port of the device 12 is connected together to form a thermal energy transfer water circuit for solar heating.

The indoor heat exchanger 12 includes an insulated box, a circulating water pump 121 and a water-refrigerant heat exchanger 122. When heating is required, the water-refrigerant heat exchanger 122 acts as a condenser, and the water-refrigerant heat exchanger 122 The refrigerant in the water-refrigerant heat exchanger 122 condenses and transfers heat to the water. During cooling, the water-refrigerant heat exchanger 122 acts as an evaporator, and the refrigerant in the water-refrigerant heat exchanger 122 evaporates to absorb the heat in the water.

The domestic hot water heat exchanger 3 is in the insulating water tank 2, and the domestic water absorbs heat from the insulating water tank 2 through the domestic water heat exchanger 3 to become domestic hot water.

In the first working mode, when only domestic hot water is needed in spring and autumn, when cooling and heating are not needed, the solar heat collector 6 works, and the solar heat energy in the solar heat collector 61 is stored in the heat preservation water tank through the circulating water pump 62; When the solar energy is insufficient to meet the domestic hot water requirements, the main heat pump unit 1A starts to work, and the indoor heat exchanger 12 generates hot water. At the same time, the water inlet of the electric three-way valve 7 is connected to the first water outlet 71, and the second water outlet 72 Closed, the main heat pump unit 1A stores heat energy in the heat preservation water tank 2; the domestic water heat exchanger 3 absorbs heat from the heat preservation water tank 2 to become domestic hot water; the auxiliary heat pump unit 1B, the cold and hot buffer water tank 13, the water supply pump 4 and the load terminal Radiator not working.

In the second mode of operation, in winter, when both domestic hot water and heating are needed, the solar thermal collector 6 works, and the solar thermal energy in the solar thermal collector 61 is stored in the thermal insulation water tank 2 by the circulating water pump 62; When meeting the domestic hot water requirement, the main heat pump unit 1A starts to work, the indoor heat exchanger 12 produces hot water, and at the same time, the water inlet of the electric three-way valve 7 is connected to the first water outlet 71, the second water outlet 2 is closed, and the main The heat pump unit 1A stores heat energy in the heat preservation water tank 2; the domestic water heat exchanger 3 absorbs heat from the heat preservation water tank 2 to become domestic hot water; The first water outlet 71 of the through valve 7 is closed, the second water outlet 72 is opened, the main heat pump unit delivers heat energy to the cold and hot buffer water tank 13, and at the same time, the auxiliary heat pump unit 1B also starts heating work to deliver heat energy to the cold and hot buffer water tank 13, Heat is supplied to the end-load radiator 10 through the water supply pump 4; when the temperature sensor 91 of the solar thermal energy transfer device 9 senses that the solar thermal energy stored in the thermal insulation water tank 2 meets domestic hot water and there is a surplus, the second water pump 92 works while the electric two The through valve 93 is opened, and the hot water in the thermal insulation water tank 2 is sent into the cold and hot buffer water tank 13, and the return pipe 22 of the thermal insulation water tank 2 is connected with the return water pipe of the main heat pump unit 1A to form a circulating waterway for heat energy transfer of solar heating; Both solar heating and air energy can be used for heating.

The third working mode, in summer, when both domestic hot water and cooling are needed, the solar thermal collector 6 works, and the solar thermal energy in the solar thermal collector 61 is stored in the thermal insulation water tank 2 by the circulating water pump 62; When the domestic hot water is not enough, the main heat pump unit 1A starts to work, the indoor heat exchanger 12 generates hot water, and at the same time, the water inlet of the electric three-way valve 7 is connected to the first water outlet 71, and the second water outlet 72 is closed. The main heat pump unit stores heat energy in the heat preservation water tank 2; the domestic water heat exchanger 3 absorbs heat from the heat preservation water tank 2 to become domestic hot water; 12 becomes the evaporator to generate chilled water. At the same time, the first water outlet 71 of the electric three-way valve 7 is closed, and the second water outlet 72 is opened. Start the refrigeration work, the indoor heat exchanger 12 becomes an evaporator to generate chilled water, and delivers chilled water to the cold and hot buffer water tank 12, and supplies cooling to the end load radiator 10 through the water supply pump 4; The two water pumps 92 stop working, and the electric two-way valve 93 is closed to isolate the heat transfer between the heat preservation water tank and the cold and hot buffer water tank.

Due to the complexity of the radiator at the load end, the circulating water flow required by the radiator at the load end and the circulating water flow required by the heat pump unit are often different. The requirement of water quantity and the setting of the overflow water pipe 8 make that when the circulating water flow required by the radiator at the load end and the circulating water flow required by the heat pump unit are different, each can still work normally. When the circulating water flow rate of the radiator at the load end is greater than the circulating water flow rate of the heat pump unit, the water in the return pipe of the radiator at the load end enters the cold and hot buffer tank 13 through the overflow pipe 8; when the circulating water flow rate of the radiator at the load end is less than that of the heat pump unit circulation When the water flow rate is high, the water in the cold and hot buffer water tank 13 flows out from the overflow water pipe 8 and enters the return water pipe of the indoor heat exchanger 12 together with the return water of the radiator at the load end; when the circulating water flow rate of the radiator at the load end is less than the circulating water flow rate of the heat pump unit , the water in the overflow pipe 8 is almost in a stagnant state.

What has been described above are only preferred embodiments of the present invention. It should be noted that, for those skilled in the art, some improvements and modifications can be made without departing from the principle of the present invention, which are also regarded as the protection scope of the present invention.

Claims (2)

1. the warm domestic hot-water's device of the cooling of source pump and solar energy interlock comprises main source pump, attemperater, life water-to-water heat exchanger, cold and hot buffer tank and control device; The system water supplement pipe is arranged on the attemperater, and life water-to-water heat exchanger is arranged in the attemperater;

Main source pump comprises heat pump outdoor unit and indoor heat exchanger, and indoor heat exchanger comprises an insulation casing, a water circulating pump and a water-refrigerant heat exchanger; Indoor heat exchanger is connected with attemperater and cold and hot buffer tank through an electric T-shaped valve, and cold and hot buffer tank is communicated with through the terminal radiator of water supply pump and several loads, to terminal radiator cooling of load or heat supply; It is characterized in that: also comprise a solar energy heat collector, a solar energy transfer device, an overflow pipe and secondary source pump more than or two,

Said solar energy heat collector comprises solar thermal collector and solar energy water circulating pump; Solar thermal collector is linked to be circulation line through solar energy water circulating pump and attemperater;

The solar energy transfer device is connected between attemperater and the cold and hot buffer tank; Overflow pipe one end is communicated with cold and hot buffer tank, the junction of the return pipe of the return pipe of the other end and radiator and indoor heat exchanger is communicated with;

The outlet pipe of the indoor heat exchanger of secondary source pump is communicated with cold and hot buffer tank, return pipe is communicated with the return pipe of radiator and the junction of overflow pipe.

2. the warm domestic hot-water's device of the cooling of a kind of source pump according to claim 1 and solar energy interlock; It is characterized in that: said solar energy transfer device comprises temperature sensor, second water pump and electric two-way valve, and temperature sensor is arranged in the attemperater;

Second water pump and electric two-way valve are communicated with attemperater and cold and hot buffer tank through pipeline, and the return pipe of an attemperater is communicated with the return pipe of the indoor heat exchanger of main source pump.

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