A multi-connected air conditioning system with precooling and preheating

Abstract

The present invention discloses a multi-connected air conditioning system with precooling and preheating, wherein a compressor, an air-conditioning heat exchanger, a liquid storage device, a drying filter, a sight glass, a throttling device, an air conditioning side heat exchanger and a gas-liquid separator are connected through pipelines to form a refrigeration system, a heat preservation water storage tank, a water pump, an air conditioning side heat exchanger, an electric three-way valve and a first terminal heat exchanger are connected through pipelines to form a first air conditioning terminal heat exchange system, a heat preservation water storage tank, a water pump, an air conditioning side heat exchanger, a first solenoid valve, a second terminal heat exchanger and a check valve are connected through pipelines to form a second air conditioning terminal heat exchange system, and a heat preservation water storage tank, a water pump, an air conditioning side heat exchanger, an electric three-way valve and a second solenoid valve are connected through pipelines to form a precooling and preheating circulation system. The present invention provides a variety of working modes, can realize automatic cooling and automatic heating, can automatically precool and preheat according to the air conditioning load temperature control requirements, has great practical value and is efficient and reliable.

Description

Technical Field

[0001] The invention relates to the field of air conditioning systems, in particular to a multi-connected air conditioning system with precooling and preheating. Background Art

[0002] With the development of social economy, more and more areas of life, production and scientific experiments need to control the ambient temperature, and there are specific requirements for the ambient temperature, the range of change and the time it takes for the temperature to reach the required value. In some occasions, the temperature of the air-conditioned area is required to reach the set value quickly, that is, the working preparation time is limited, which requires the air-conditioning system to respond quickly and meet the temperature control requirements within the required working preparation time. Summary of the invention

[0003] The purpose of the present invention is to provide a multi-connected air-conditioning system with precooling and preheating, which has multiple working modes, can realize automatic cooling and automatic heating, can automatically precool and preheat according to the temperature control requirements of the air-conditioning load, and quickly realize the temperature control requirements of the air-conditioning area. It has great practical value and is efficient and reliable.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A multi-connected air conditioning system with precooling and preheating, comprising a compressor, an air-side heat exchanger, a liquid storage device, a drying filter, a sight glass, a throttling device, and a gas-liquid separator, and also comprising an air-conditioning side heat exchanger, a heat preservation water storage tank, a water pump, a first terminal heat exchanger, a second terminal heat exchanger, an electric three-way valve, a first solenoid valve, and a second solenoid valve. The air-conditioning side heat exchanger is a plate heat exchanger, and the air-conditioning side heat exchanger has two flow channels, wherein:

[0006] The compressor, the air side heat exchanger, the liquid storage device, the drying filter, the liquid sight glass, the throttling device, the air conditioning side heat exchanger, the first flow channel and the gas-liquid separator are connected by pipelines to form a refrigerant circulation loop;

[0007] The water outlet of the thermal insulation water storage tank is connected to the water inlet of the water pump through a pipeline, the water outlet of the water pump is connected to one end of the second flow channel of the air-conditioning side heat exchanger through a pipeline, the other end of the second flow channel of the air-conditioning side heat exchanger is connected to a valve port of the electric three-way valve through a pipeline, the other valve port of the electric three-way valve is connected to the inlet end of the first terminal heat exchanger through a pipeline, and the outlet end of the first terminal heat exchanger is connected to the water inlet of the thermal insulation water storage tank through a pipeline, thereby forming a first air-conditioning terminal heat exchange system;

[0008] The inlet end of the second terminal heat exchanger is connected to the pipeline between the air-conditioning side heat exchanger and the electric three-way valve through the first solenoid valve bypass, and the outlet end of the second terminal heat exchanger is connected to the pipeline between the first terminal heat exchanger and the thermal insulation water tank through the bypass, and the thermal insulation water tank, the water pump, the air-conditioning side heat exchanger, the first solenoid valve, and the second terminal heat exchanger constitute a second air-conditioning terminal heat exchange system;

[0009] The third valve port of the electric three-way valve is connected to the pipeline between the first terminal heat exchanger and the insulated water tank through the second solenoid valve bypass. The insulated water tank, water pump, air-conditioning side heat exchanger, electric three-way valve, and second solenoid valve constitute a precooling and preheating circulation system.

[0010] The first air conditioning terminal heat exchange system also includes a first stop valve and a second stop valve. The first stop valve is connected to the inlet pipeline of the first terminal heat exchanger, and the second stop valve is connected to the outlet pipeline of the first terminal heat exchanger.

[0011] The second air conditioning terminal heat exchange system also includes a check valve, the inlet end of the check valve is connected to the outlet end of the second terminal heat exchanger through a pipeline, and the outlet end of the check valve is connected to the pipeline between the first terminal heat exchanger and the thermal insulation water tank through a pipeline.

[0012] The warm water storage tank is provided with an electric heater and a temperature sensor. The bottom of the heat preservation water storage tank is provided with a drain port, the top of the heat preservation water storage tank is provided with a liquid injection port, and the drain port is connected to a first ball valve, and the liquid injection port is connected to a second ball valve. The top of the heat preservation water storage tank is connected to an exhaust device.

[0013] Beneficial effects of the present invention:

[0014] 1. The present invention is provided with an insulated water storage tank and a water pump to realize the circulating heat exchange between the refrigerant and the air-conditioning side heat exchanger, release the cold or heat in multiple air-conditioning terminal heat exchangers, form a multi-connected air-conditioning system, and meet the air-conditioning requirements of different regions.

[0015] 2. The present invention is provided with a solenoid valve and an electric three-way valve, and realizes the cooling, heating, pre-cooling and pre-heating functions of the air-conditioning system through the switching of the solenoid valve and the reversing of the electric three-way valve.

[0016] 3. The invention has stable and reliable operation, high practical value and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the system of the present invention. DETAILED DESCRIPTION

[0018] The present invention discloses a multi-connected air conditioning system with precooling and preheating, comprising a compressor 1, an air side heat exchanger 2 equipped with an axial flow fan 3, a liquid storage tank 4, a drying filter 5, a sight glass 6, a throttling device 7, an air conditioning side heat exchanger 8, a gas-liquid separator 9, a heat preservation water storage tank 10, a water pump 11, an electric three-way valve 13, a first solenoid valve 121, a second solenoid valve 122, a first terminal heat exchanger 161 equipped with a first centrifugal fan 151, a second terminal heat exchanger 162 equipped with a second centrifugal fan 152, and a check valve 17. The air conditioning side heat exchanger 8 is a plate heat exchanger, and has two flow channels in the air conditioning side heat exchanger 8, wherein:

[0019] The outlet of the compressor 1 is connected to the inlet of the air-side heat exchanger 2 through a pipeline, and the outlet of the air-side heat exchanger 2 is connected to the inlet of the liquid reservoir 4 through a pipeline. The outlet of the liquid reservoir 4 is connected to one end of the first flow channel of the air-conditioning side heat exchanger 8 through a drying filter 5, a sight glass 6, and a throttling device 7 in sequence. The other end of the first flow channel of the air-conditioning side heat exchanger 8 is connected to the inlet of the gas-liquid separator 9 through a pipeline, and the outlet of the gas-liquid separator 9 is connected to the inlet of the compressor 1 through a pipeline, thereby forming a refrigerant circulation loop. In the refrigerant circulation loop, the throttling device 7 is any one of an electronic expansion valve, a thermal expansion valve, and a throttling orifice plate. In this embodiment, the throttling device 7 uses an electronic expansion valve. The air-conditioning side heat exchanger 8 is equipped with an axial flow fan 3 to realize condensation heat exchange.

[0020] The water outlet of the heat preservation water storage tank 10 is connected to the water inlet of the water pump 11 through a pipeline, the water outlet of the water pump 11 is connected to one end of the second flow channel of the air conditioning side heat exchanger 8 through a pipeline, the other end of the second flow channel of the air conditioning side heat exchanger 8 is connected to a valve port 13a of the electric three-way valve 13 through a pipeline, the other valve port 13b of the electric three-way valve 13 is connected to the inlet end of the first terminal heat exchanger 161 through a pipeline with a first stop valve 141, and the outlet end of the first terminal heat exchanger 161 is connected to the water inlet of the heat preservation water storage tank 10 through a pipeline with a second stop valve 142, thereby forming a first air conditioning terminal heat exchange system. Among them, the centrifugal fan 151 configured in the first terminal heat exchanger 161 realizes terminal heat exchange.

[0021] The pipeline between the other end of the second flow channel of the air-conditioning side heat exchanger 8 and the valve port 13a of the electric three-way valve 13 is also bypassed with a pipeline connected to the inlet end of the first solenoid valve 121, and the outlet end of the first solenoid valve 121 is connected to the inlet end of the second terminal heat exchanger 162 through a pipeline, and the outlet end of the second terminal heat exchanger 162 is connected to the inlet end of the check valve 17 through a pipeline, and the outlet end of the check valve 17 is bypassed through a pipeline to the pipeline between the second stop valve 142 and the water inlet of the thermal insulation water tank 10, and the thermal insulation water tank 10, the water pump 11, the air-conditioning side heat exchanger 8, the first solenoid valve 121, the second terminal heat exchanger 162, and the check valve 17 constitute a second air-conditioning terminal heat exchange system. Among them, the centrifugal fan 152 configured for the second terminal heat exchanger 162 realizes terminal heat exchange.

[0022] The third valve port 13c of the electric three-way valve 13 is connected to the inlet end of the second solenoid valve 122 through a pipeline, and the outlet end of the second solenoid valve 122 is connected to the second stop valve 142 and the pipeline between the water inlet of the insulated water tank 10 through a pipeline bypass. The insulated water tank 10, the water pump 11, the air-conditioning side heat exchanger 8, the electric three-way valve 13, and the second solenoid valve 122 constitute a pre-cooling and preheating circulation system.

[0023] The thermal insulation water storage tank 10 is provided with an electric heater 19 and a temperature sensor 20, which are electrically connected to an external controller respectively, and the external controller receives the measurement data of the temperature sensor 20 and controls the operation of the electric heater 19. The discharge port at the bottom of the thermal insulation water storage tank 10 is connected to a first ball valve 181, the injection port at the top of the thermal insulation water storage tank 10 is connected to a second ball valve 182, and an exhaust device 21 is also connected to the top of the thermal insulation water storage tank 10.

[0024] The specific working principle and process of the present invention are as follows:

[0025] Refrigeration mode: Through the refrigerant circulation of the refrigeration system, heat is exchanged with the water delivered by the water pump 11 in the air-conditioning side heat exchanger 8. A part of the cooled water flows in through the port 13a of the electric three-way valve 13, flows out from the port 13b, enters the first terminal heat exchanger 161 through the first stop valve 141, flows back to the thermal insulation water storage tank 10 after passing through the second stop valve 142, and completes a refrigeration cycle; another part of the water enters the second terminal heat exchanger 162 through the first solenoid valve 121, flows back to the thermal insulation water storage tank 10 after passing through the check valve 17, and also completes a refrigeration cycle. In this mode, the first solenoid valve 121 is opened, the second solenoid valve 122 is closed, and the low-temperature water in the first terminal heat exchanger 161 and the second terminal heat exchanger 162 exchanges heat with the air in the air-conditioning area under the action of the centrifugal fans 151 and 152, thereby achieving refrigeration.

[0026] Heating mode: the electric heater 19 in the thermal insulation water tank 10 is working, the water in the thermal insulation water tank 10 is heated and then transported by the water pump 11, and flows into the first terminal heat exchanger 161 and the second terminal heat exchanger 162 in the same direction as in the cooling mode, and then flows back to the thermal insulation water tank 10, completing a heating cycle. In this mode, the first solenoid valve 121 is opened, the second solenoid valve 122 is closed, and the high-temperature water in the first terminal heat exchanger 161 and the second terminal heat exchanger 162 exchanges heat with the air in the air-conditioned area under the action of the centrifugal fans 151 and 152, thereby achieving heating.

[0027] Precooling mode: Through the refrigerant circulation of the refrigeration system, heat is exchanged with the water delivered by the water pump 11 in the air-conditioning side heat exchanger 8, and the cooled water flows in from the 13a port of the electric three-way valve 13, flows out from the 13c port, flows through the second solenoid valve 122 and flows back to the thermal insulation water storage tank 10, completing a precooling cycle. In this mode, the first solenoid valve 121 is closed and the second solenoid valve 122 is opened, and precooling can be automatically performed and stopped according to the temperature setting value of the temperature sensor 20 in the thermal insulation water storage tank 10.

[0028] Preheating mode: the electric heater 19 in the thermal insulation water tank 10 is working, the water in the thermal insulation water tank 10 is heated and then transported by the water pump 11, flows into the electric three-way valve 13 from the port 13a, flows out from the port 13c, flows through the second solenoid valve 122 and then flows back to the thermal insulation water tank 10, completing a preheating cycle. In this mode, the first solenoid valve 121 is closed and the second solenoid valve 122 is opened, and the preheating can be automatically performed and stopped according to the temperature setting value of the temperature sensor 20 in the thermal insulation water tank 10.

[0029] Users can select different operation modes according to different usage requirements. When the temperature of the air-conditioned area reaches the required temperature difference with the set value, it will enter the pre-cooling or pre-heating mode to quickly achieve the temperature control requirements. At the same time, the thermal insulation water storage tank has an energy storage function, which can effectively solve the problem of temperature fluctuations in the air-conditioned area caused by the shutdown of the refrigeration system. In addition, two or more air-conditioning terminal heat exchangers constitute a multi-connected air-conditioning system, which can work simultaneously or in different time periods to meet the temperature control requirements of different areas.

[0030] The embodiments described above are merely descriptions of the preferred implementation modes of this patent and are not intended to limit the scope of the invention. Without departing from the design spirit of the invention, various modifications and improvements made to the technical solutions of the invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the invention.

Claims

1. A multi-connected air conditioning system with precooling and preheating, comprising a compressor, an air-side heat exchanger, a liquid storage device, a drying filter, a liquid sight glass, a throttling device, and a gas-liquid separator, characterized in that: It also includes an air-conditioning side heat exchanger, an insulated water storage tank, a water pump, a first terminal heat exchanger, a second terminal heat exchanger, an electric three-way valve, a first solenoid valve, and a second solenoid valve. The air-conditioning side heat exchanger has two flow channels, wherein: the compressor, the air-side heat exchanger, the liquid storage tank, the drying filter, the sight glass, the throttling device, the air-conditioning side heat exchanger, the first flow channel and the gas-liquid separator are connected through pipelines to form a refrigerant circulation loop; the water outlet of the insulated water storage tank is connected to the water inlet of the water pump through a pipeline, the water outlet of the water pump is connected to one end of the second flow channel of the air-conditioning side heat exchanger through a pipeline, the other end of the second flow channel of the air-conditioning side heat exchanger is connected to one valve port of the electric three-way valve through a pipeline, and the other valve port of the electric three-way valve is connected to the inlet of the first terminal heat exchanger through a pipeline. The outlet end of the first terminal heat exchanger is connected to the water inlet of the thermal insulation water tank through a pipeline, thereby forming a first air-conditioning terminal heat exchange system; the inlet end of the second terminal heat exchanger is connected to the pipeline between the air-conditioning side heat exchanger and the electric three-way valve through a first solenoid valve bypass, and the outlet end of the second terminal heat exchanger is connected to the pipeline between the first terminal heat exchanger and the thermal insulation water tank through a bypass, and the second air-conditioning terminal heat exchange system is formed by the thermal insulation water tank, the water pump, the air-conditioning side heat exchanger, the first solenoid valve, and the second terminal heat exchanger; the third valve port of the electric three-way valve is connected to the pipeline between the first terminal heat exchanger and the thermal insulation water tank through a second solenoid valve bypass, and the thermal insulation water tank, the water pump, the air-conditioning side heat exchanger, the electric three-way valve, and the second solenoid valve form a pre-cooling and preheating circulation system; The first air conditioner terminal heat exchange system further includes a first stop valve and a second stop valve, the first stop valve is connected to the first terminal heat exchanger inlet end pipeline, and the second stop valve is connected to the first terminal heat exchanger outlet end pipeline; The second air conditioning terminal heat exchange system also includes a check valve, the inlet end of the check valve is connected to the outlet end of the second terminal heat exchanger through a pipeline, and the outlet end of the check valve is connected to the pipeline between the first terminal heat exchanger and the thermal insulation water tank through a pipeline; The heat-insulating water storage tank is provided with an electric heater and a temperature sensor.

2. A multi-connected air conditioning system with precooling and preheating according to claim 1, characterized in that: The air-conditioning side heat exchanger is a plate heat exchanger.

3. The multi-connected air conditioning system with precooling and preheating according to claim 1, characterized in that: The heat-insulating water storage tank is provided with a liquid discharge port at the bottom and a liquid injection port at the top, and the liquid discharge port is connected to and installed with a first ball valve, and the liquid injection port is connected to and installed with a second ball valve.

4. The multi-connected air conditioning system with precooling and preheating according to claim 1, characterized in that: The top of the heat-insulating water storage tank is connected with an exhaust device.

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