CN100580339C - Solar Jet Electric Compression Heat Pump Composite Air Conditioning Unit - Google Patents

Abstract

The invention relates to a solar jet electric compression composite heat pump air conditioner unit which utilizes solar energy for heating and cooling. The necessary valves and pipeline systems are composed of an electric compression heat pump air conditioning system and necessary valves on the basis of the conventional solar jet refrigeration system. The valve switches to control the flow of the water system, so that the unit provides cooling and heating to the air-conditioning users, and solves the problem of imbalance between solar energy resources and air-conditioning loads encountered when solar energy is used for air-conditioning heating and cooling, and is stable and reliable. Provide chilled water for air-conditioning and hot water for air-conditioning with a temperature between 40-80°C. The hot water temperature span is large, making full use of solar energy resources, which can improve the utilization rate of solar energy, reduce environmental pollution, and relieve the pressure on the power grid.

Description

Solar Jet Electric Compression Heat Pump Composite Air Conditioning Unit

Technical field:

The invention relates to a solar jet electric compression composite heat pump air conditioner unit for heating and cooling by solar energy in the field of air conditioning and refrigeration.

Background technique:

With the further aggravation of the energy crisis, the utilization of solar energy has become the focus of attention. In the solar energy utilization technology, the solar jet refrigeration system is favored by everyone for its simple structure, few moving parts, and low cost, and it is more and more widely used in the field of air conditioning and refrigeration. The operation effect of the traditional solar jet refrigeration system is mainly restricted by two factors: one is the variation of solar radiation intensity, and the other factor is the variation characteristics of the cooling load of the air conditioner at the user end. The collection of solar energy can only be carried out during the day when the sun is shining. Usually, the climate is volatile and the intensity of solar radiation is constantly changing. Even in the daytime, it is impossible to completely rely on solar energy for heating or cooling; People also need a certain amount of heat or cold for air conditioning. Obviously, relying solely on solar energy is impossible to meet the requirements of people's work and life. Based on this, a solar jet electric compression heat pump air-conditioning unit is invented, which can provide cooling and heating for the air-conditioning system through the conventional electric compression system when the solar radiation is insufficient, so as to make full use of solar energy resources, which is helpful for saving energy and alleviating The peak pressure of electricity consumption caused by the traditional electric compression refrigeration system improves the utilization efficiency of light and heat, which has important social and economic benefits.

Invention content:

The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a method of adding an electric compression heat pump air-conditioning structure and necessary control valves on the basis of the conventional solar spray refrigeration structure to solve the problems that are difficult to rely solely on the conventional solar spray refrigeration system. A solar jet electric compression composite heat pump air conditioning unit that realizes the supply-demand balance between cooling capacity and air-conditioning load.

The technical solution adopted in the present invention is: including solar hot water circuit, injection refrigerant circuit, electric compression refrigerant circuit, air-conditioning water circuit, characterized in that:

The solar hot water circuit includes a solar collector, a generator connected in series with the solar collector through pipelines and water pumps;

In the injection refrigerant circuit, it is divided into two paths from the outlet of the condenser: one path is connected to the refrigerant pump, generator and ejector through pipelines, and the other path is connected to the throttle valve, ejector evaporator, ejector, ejector and ejector in sequence. The condensers are directly connected by pipelines;

The electric compression refrigerant circuit includes a four-way reversing valve, a compressor connected to two ports of the four-way reversing valve, a condenser connected to the other two ports of the four-way reversing valve through pipelines, a throttle valve, Evaporator;

The air-conditioning water circuit includes a water collector connected to the generator, evaporator, jet evaporator, air-conditioning water pump and water separator through pipelines, and the pipeline between the water collector and the generator is provided with a generator valve F ₂ , The connecting pipeline between the generator and the air-conditioning water pump is provided with the first valve F ₃ of the air-conditioning water pump, the second valve F ₄ of the air-conditioning water pump, and the third valve F ₆ of the air-conditioning water pump. There are the first valve F ₁ of the evaporator, the second valve F ₅ of the evaporator, and the pipeline between the first valve F _{1 of} the evaporator and the second valve F ₅ of the evaporator and the first valve F ₃ of the air-conditioning water pump, the second valve of the air-conditioning water pump The pipelines of the two valves _F4 are intersected, and the evaporator is directly connected to the pipeline between the second valve _F4 of the air-conditioning water pump and the third valve _F6 of the air-conditioning water pump. One side of the jet evaporator is connected with the jet evaporator valve _F7 The pipeline between the second valve _F4 of the air-conditioning water pump and the third valve _F6 of the air-conditioning water pump is connected, and the other side is directly connected to the air-conditioning water pump.

Each of the above-mentioned valves is a manual control or automatic control valve.

The beneficial effects of the present invention are: the present invention solves the problem of solar energy resources encountered when solar energy is used for air-conditioning heating and cooling by adding an electric compression heat pump air-conditioning system and necessary control valves on the basis of conventional solar jet refrigeration systems. The problem of unbalanced supply and demand between air-conditioning loads can stably and reliably provide chilled water for air-conditioning and hot water for air-conditioning with a temperature between 40-80°C. The hot water temperature span is large, which can meet domestic hot water supply and also meet Production process heating and small area heating, suitable for radiant cooling and fan coil air conditioning systems, the unit determines the start and stop of the injection system and the electric compression heat pump air conditioning system according to the needs of the air conditioning load and the specific conditions of solar radiation, through the valve The switch and switch control the flow of the water system, so that the unit can provide cooling and heating to the air-conditioning users, and can make full use of solar energy resources, which is of great significance to improving the utilization rate of solar energy, reducing environmental pollution, and relieving the pressure on the power grid. At the same time, the system can realize the mutual complementation of solar energy and electric energy, improve the utilization rate of solar energy, and relieve the pressure on the power grid caused by the electricity consumption of air conditioners, which has significant social and economic benefits.

Description of drawings:

Fig. 1 is a structural schematic diagram of the solar jet electric compression heat pump air conditioning unit of the present invention.

Detailed ways

Specific embodiments are given below in conjunction with the accompanying drawings to further illustrate the solar injection/electric compression heat pump air-conditioning unit.

As shown in Figure 1, the present invention includes a solar hot water circuit, a spray refrigerant circuit, an electric compression refrigerant circuit, and an air-conditioning water circuit, and is characterized in that:

The solar hot water circuit includes a solar heat collector 1, a generator 3 connected in series with the solar heat collector 1 through a pipeline and a water pump 2; in the injection refrigerant circuit, the outlet from the condenser 5 is divided into two paths: one path is connected to the refrigeration system through a pipeline. Agent pump 6, generator 3 and ejector 4, and the other path is connected to throttle valve 7, jet evaporator 8, ejector 4 in sequence, ejector 4 and jet condenser 5 are directly connected by pipelines; The circuit includes a four-way reversing valve 11, a compressor 12 connected to the two ports of the four-way reversing valve 11, a condenser 10 connected to the other two ports of the four-way reversing valve 11 through pipelines, and a throttle valve 9. Evaporator 13; the air-conditioning water loop includes a water collector 16 connected to the generator 3, evaporator 13, jet evaporator 8, air-conditioning water pump 14 and water separator 15 through pipelines, wherein the water collector 16 is connected to the generator The generator valve F ₂ is installed in the pipeline between the 3 rooms, and the connecting pipeline between the generator 3 and the air-conditioning water pump 14 is sequentially provided with the first valve F ₃ of the air-conditioning water pump, the second valve F ₄ of the air-conditioning water pump, and the third valve of the air-conditioning water pump. Valve F ₆ , the first valve F 1 of the evaporator, _the second valve F ₅ of the evaporator are arranged in sequence on the pipeline between the water collector 16 and the evaporator 13, and the first valve F ₁ of the evaporator, the second valve F of the evaporator The pipeline between ₅ and the first valve _F3 of the air-conditioning water pump and the pipeline of the second valve _F4 of the air-conditioning water pump intersect, and the evaporator 13 is directly between the second valve _F4 of the air-conditioning water pump and the third valve _F6 of the air-conditioning water pump One side of the jet evaporator 8 is connected to the pipeline between the second valve _F4 of the air conditioner water pump and the third valve _F6 of the air conditioner water pump through the jet evaporator valve _F7 , and the other side is directly connected to the air conditioner Water pump 14 is connected.

Each of the above-mentioned valves is a manual control or automatic control valve.

The unit is expected to be in the air-conditioning cold and hot water dual supply system. While providing chilled water for air-conditioning, it also provides hot water with a temperature between 40-90°C. The temperature span of hot water is large, which can not only meet domestic hot water supply, but also meet production process heating and small area heating. The system can also provide low-temperature chilled water separately, which is suitable for air-conditioning systems such as radiant cooling and fan coil units.

The solar heat collection system is mainly composed of a solar heat collector 1, a water pump 2, a generator 3 and so on. The water circulates in the pipeline to absorb solar energy to obtain the required hot water. The jet refrigeration system is mainly composed of a generator 3, an ejector 4, a jet condenser 5, a jet evaporator 8, a throttling device 7 and a refrigerant pump 6. During operation, the heat energy of the hot water passing through the generator is converted into Cool for use by the air conditioning system. The electric compression heat pump air conditioning system consists of compressor 12, evaporator 13, condenser 10, throttling device 9, reversing valve 11 and some necessary control systems. It will supply cooling and heating according to the needs of air conditioning load during operation. The air-conditioning water pump 14, the water collector 15, the water distributor 16 and each valve mainly realize the needs of heating and cooling for users.

In the figure, the thick solid line represents the refrigerant pipeline, and the rest are mainly water system pipelines.

When the air-conditioning system needs cooling: the generator valve F ₂ and the first valve F ₃ of the air-conditioning water pump are closed, and the first valve F ₁ of the evaporator is opened. During the day, when the solar energy resource is abundant and the temperature in the hot water tank 2 reaches the start-up requirement of the jet refrigeration system, the jet refrigeration system starts to run, the electric compression refrigeration system stops, the second valve _F5 of the evaporator and the third valve _F6 of the air conditioner water pump are closed, and the air conditioner The second valve F ₄ of the water pump and the valve F ₇ of the jet evaporator are opened. At this time, cooling is supplied to the air conditioning system by the ejector refrigeration system alone. When the solar energy resources are insufficient, the jet refrigeration system stops running, the electric compression refrigeration system starts, the second valve _F4 of the air conditioning water pump and the valve _F7 of the jet evaporator are closed, the second valve _F5 of the evaporator and the third valve _F6 of the air conditioning water pump are opened . At this time, the electric compression refrigeration system supplies cooling to the air conditioning system.

When the air-conditioning system needs heat supply: when the solar energy resources are abundant during the day and the temperature in the hot water tank 2 reaches the temperature required by the air-conditioning user for heating, the generator valve F ₂ , the first valve F ₃ of the air-conditioning water pump, and the second valve of the air-conditioning water pump F ₄ , the third valve F ₆ of the air-conditioning water pump is opened, the second valve F ₅ of the evaporator, and the valve F ₇ of the jet evaporator are closed. The heat is supplied directly to the air conditioner users by the solar heat collection system. When the solar energy resources are insufficient and the temperature in the hot water tank 2 does not meet the requirements, close the generator valve F ₂ and the first valve F ₃ of the air-conditioning water pump, open the first valve F ₁ of the evaporator, and the electric compression heating system starts, and the air conditioner The second valve F ₄ of the water pump and the valve F ₇ of the jet evaporator are closed, and the second valve F ₅ of the evaporator and the third valve F ₆ of the air conditioning water pump are opened. At this time, the electric compression system supplies heat to the air conditioning system.

Claims (2)

1. A solar jet electric compression composite heat pump air conditioner unit, comprising a solar hot water circuit, a jet refrigerant circuit, an electric compression refrigerant circuit, and an air conditioning water circuit, characterized in that: The solar hot water circuit makes water circulate in the pipeline to absorb solar energy to obtain the required hot water, which includes a solar heat collector (1) and a generator (3) connected in series by the first pipeline system , the water pump (2), the specific connection method is: the outlet of the solar heat collector (1) is connected with the inlet of the generator (3), the outlet of the generator (3) is connected with the inlet of the water pump (2), and the outlet of the water pump (2) is connected with the inlet of the solar collector Heater (1) inlet is connected; The injection refrigerant circuit converts the thermal energy of the hot water passing through the generator into cold energy for use by the air-conditioning system during operation, and it includes a refrigerant pump (6) connected together by a second pipeline system, a generator (3), ejector (4), jet condenser (5), jet evaporator (8), throttle valve (7), wherein the outlet of ejector (4) and jet condenser (5) are directly connected by pipeline connected, and the outlet of the jet condenser (5) is divided into two paths: one path is connected to the refrigerant pump (6), generator (3) and ejector (4) in turn through the pipeline, and the other path is connected to the throttle valve in sequence through the pipeline (7), jet evaporator (8), injector (4); The electric compression refrigerant circuit provides cooling and heating according to the needs of the air-conditioning load during operation, and includes a four-way reversing valve (11), a compressor connected between the two ports of the four-way reversing valve (11) (12) and the condenser (10), throttling valve (9), and evaporator (13) connected to the other two ports of the four-way reversing valve (11) through the third pipeline system; The air-conditioning water circuit realizes the needs of heating and cooling for users, and it includes a generator (3), an evaporator (13), a jet evaporator (8), an air-conditioning water pump ( 14), the water separator (15) and the water collector (16); wherein the connecting pipeline between the water collector (16) and the generator (3) is provided with a generator valve (F ₂ ), and the generator (3 ) and the air-conditioning water pump (14) are sequentially provided with the first valve of the air-conditioning water pump (F ₃ ), the second valve of the air-conditioning water pump (F ₄ ), the third valve of the air-conditioning water pump (F ₆ ), and the water collector ( 16) The connecting pipeline between the evaporator (13) is provided with the first valve of the evaporator (F ₁ ), the second valve of the evaporator (F ₅ ), and the first valve of the evaporator (F ₁ ), the evaporator The pipeline between the second valve (F ₅ ) and the pipeline between the first valve (F ₃ ) of the air-conditioning water pump and the second valve (F ₄ ) of the air-conditioning water pump intersect; the evaporator (13) is directly connected to the air-conditioning water pump The pipeline between the second valve (F ₄ ) and the third valve (F ₆ ) of the air-conditioning water pump is connected, and one side of the jet evaporator ( ₈ ) is connected to the second valve (F ₄ ) is connected to the pipeline between the third valve (F ₆ ) of the air-conditioning water pump, and the other side is directly connected to the air-conditioning water pump (14). 2. The solar jet electric compression compound heat pump air-conditioning unit according to claim 1, characterized in that each of the above-mentioned valves is a manual control valve or an automatic control valve.

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