Four-pipe air treatment system capable of simultaneously refrigerating and heating all year round

Abstract

The utility model provides a four-pipe air processing system capable of simultaneously refrigerating and heating all the year round. The system comprises an air cooling host and a four-pipe air processor, the air cooling main machine is composed of a condenser, an evaporator, a first heat exchanger and a second heat exchanger, the first heat exchanger and the condenser form a hot water heat exchanger structure, and the second heat exchanger and the evaporator form a cold water heat exchanger structure. The air processor is composed of a cold water coil pipe, a hot water coil pipe and a centrifugal fan, the hot water coil pipe is connected with the first heat exchanger through a pipeline, and the cold water coil pipe is connected with the second heat exchanger through a pipeline. Compared with the prior art, the hot water coil pipe is connected with the first heat exchanger pipeline, and the cold water coil pipe is connected with the second heat exchanger pipeline to form a mutually independent cold and hot double-circulation pipeline structure, so that the working conditions of the cold water coil pipe and the second heat exchanger as well as the hot water coil pipe and the first heat exchanger can be controlled according to actual requirements; and the functions of refrigerating and heating all the year round are achieved.

Description

Technical Field

[0001] The utility model relates to the field of air conditioning, in particular to a four-pipe air processing system capable of simultaneous cooling and heating throughout the year. Background Art

[0002] The air is cooled and dehumidified in the surface cooling section of the air handling unit. The temperature of the treated air is relatively low and needs to be heated to the required temperature before being sent indoors. Traditional reheating usually uses electric heating or hot water source heating.

[0003] Air handling systems with electric heating such as Figure 1 As shown, when the air-cooled host of this system is cooling in summer or transitional seasons, the valves on the cold water supply and return pipes are opened, and the valves on the hot water supply and return pipes are closed. The air passes through the cold water coil to cool down and dehumidify. However, when the air temperature is lower than the air supply state requirement, since the air-cooled host cannot provide hot water in summer, electric heating is required to heat the air to the air supply state, and then it is sent to the room through the fan. When the air-cooled host is heating in winter, the valves on the hot water supply and return pipes are opened, and the valves on the cold water supply and return pipes are closed. The air passes through the hot water coil to heat up to the air supply state, and then it is sent to the room through the fan. In the transitional season, the indoor space has external heating and internal cooling, and this system cannot be applied.

[0004] Since reheating is a process of canceling out cold and heat, the resources needed to generate this part of heat are repeated energy consumption, which greatly reduces the energy utilization rate of the entire system and leads to high carbon emissions during the use of the building. Utility Model Content

[0005] The utility model aims to provide a four-pipe air handling system capable of cooling and heating all year round, so as to solve the problem of repeated energy consumption of traditional air conditioning systems.

[0006] The utility model provides a four-pipe air handling system capable of cooling and heating all year round, the system comprising: an air-cooling host, a four-pipe air handling unit;

[0007] The air-cooled main unit is composed of a condenser, an evaporator, a first heat exchanger, and a second heat exchanger. The first heat exchanger and the condenser form a hot water heat exchanger structure, and the second heat exchanger and the evaporator form a cold water heat exchanger structure.

[0008] The air handler is composed of a cold water coil, a hot water coil, and a centrifugal fan. The hot water coil is connected to a first heat exchanger pipeline, and the cold water coil is connected to a second heat exchanger pipeline.

[0009] Furthermore, the air-cooled main unit also includes a throttling device and a compressor, and the condenser, throttling device, evaporator, and compressor are connected in sequence to form a ring pipeline structure.

[0010] Furthermore, the cold water coil, the hot water coil and the centrifugal fan are connected in sequence, and the cold water coil and the hot water coil are provided with mutually interconnected guide channels, and the centrifugal fan is connected to the guide channels.

[0011] Furthermore, the air inlet of the centrifugal fan is connected to the guide channel.

[0012] Furthermore, the system also includes a hot water electric valve and a hot water solenoid valve. The water inlet end of the hot water coil is connected to the water outlet end of the first heat exchanger through the hot water electric valve, and the water outlet end of the hot water coil is connected to the water inlet end of the first heat exchanger through the hot water solenoid valve.

[0013] Furthermore, the system also includes a cold water electric valve and a cold water solenoid valve. The water inlet end of the cold water coil is connected to the water outlet end of the second heat exchanger through the cold water electric valve, and the water outlet end of the cold water coil is connected to the water inlet end of the second heat exchanger through the cold water solenoid valve.

[0014] Compared with the prior art, the utility model sets a hot water coil connected to the first heat exchanger pipeline, and sets a cold water coil connected to the second heat exchanger pipeline, forming a mutually independent hot and cold dual-circulation pipeline structure, and then can control the working conditions of the cold water coil and the hot water coil according to actual needs, and realize the functions of simultaneous cooling and heating throughout the year. In addition, the utility model effectively utilizes the condensation heat of the air-cooled main engine in the reheating process of air treatment, no longer uses other energy sources, changes the heating method of air reheating, avoids the increase of electric power caused by the use of electric heating sections, and avoids the energy waste and carbon emission increase caused by the combustion of fossil energy, and avoids the restrictions of municipal heat sources or self-set heat sources. It has the characteristics of simple system structure and high energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of an existing four-pipe air handling system with electric heating;

[0016] Figure 2 This is a schematic diagram of the structure of a four-pipe air handling system for simultaneous cooling and heating throughout the year according to an embodiment of the utility model;

[0017] 1. Condenser; 2. Evaporator; 3. First heat exchanger; 4. Second heat exchanger; 5. Cold water coil; 6. Hot water coil; 7. Centrifugal fan; 8. Throttling device; 9. Compressor; 10. Hot water electric valve; 11. Hot water solenoid valve; 12. Cold water electric valve; 13. Cold water solenoid valve. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0020] The utility model embodiment discloses a four-pipe air handling system capable of cooling and heating all year round, the system comprising: an air-cooling host, a four-pipe air handling unit;

[0021] The air-cooled main unit is composed of a condenser 1, an evaporator 2, a first heat exchanger 3, and a second heat exchanger 4. The first heat exchanger 3 and the condenser 1 form a hot water heat exchanger structure, and the second heat exchanger 4 and the evaporator 2 form a cold water heat exchanger structure.

[0022] The air handler is composed of a cold water coil 5, a hot water coil 6, and a centrifugal fan 7. The hot water coil 6 is connected to the first heat exchanger 3 by pipeline, and the cold water coil 5 is connected to the second heat exchanger 4 by pipeline.

[0023] Among them, the first heat exchanger 3 and the condenser 1 form a hot water heat exchanger structure, which plays the role of condensation heat recovery. The air-cooled main unit recovers the condensation heat generated by itself to provide hot water to the hot water coil 6 to heat the air and raise the temperature to the air supply state. In hot seasons such as summer, when only cooling is needed, the hot water electric valve 10 and the hot water solenoid valve 11 are closed, and the cold water magnetic valve 13 is opened. The cold water flow in the cold water coil 5 and the second heat exchanger 4 is controlled through the cold water electric valve 12. At this time, the evaporator 2 and the second heat exchanger 4 provide cold capacity, forming an air-conditioning refrigeration structure to provide cold water for the cold water coil 5. The heat at the condenser 1 can be dissipated and taken away by means of a fan or the like.

[0024] When only heating is needed in cold seasons such as winter, the cold water electric valve 12 and the cold water solenoid valve 13 are closed, and the hot water solenoid valve 11 is opened. The hot water electric valve 10 is used to control the hot water flow in the hot water coil 6 and the first heat exchanger 3. At this time, the condenser 1 and the first heat exchanger 3 provide heat, forming a similar air-conditioning heating structure to provide cold water for the hot water coil 6. The cold at the evaporator 2 can be dissipated and taken away by means of a fan or the like.

[0025] When the temperature and humidity of the air need to be adjusted at the same time, the cold water solenoid valve 13 needs to be opened, and the cold water flow in the cold water coil 5 and the second heat exchanger 4 is controlled through the cold water electric valve 12 to supercool and dehumidify the hot and humid air; the hot water solenoid valve 11 is opened, and the hot water flow in the hot water coil 6 and the first heat exchanger 3 is controlled through the hot water electric valve 10 to heat the supercooled dry air to the target state point, completing the temperature and humidity adjustment of the air. The evaporator 2 and the second heat exchanger 4 provide cold energy, and the condenser 1 and the first heat exchanger 3 provide heat. The excess heat or cold energy is then cooled or dissipated by the fan.

[0026] like Figure 2 As shown, the embodiment of the utility model is provided with a hot water coil 6 connected to the first heat exchanger 3 pipeline, and a cold water coil 5 connected to the second heat exchanger 4 pipeline, forming a mutually independent cold and hot dual circulation pipeline structure, and then the working conditions of the cold water coil 5 and the hot water coil 6 can be controlled according to actual needs, so as to realize the function of simultaneous cooling and heating throughout the year. In addition, the heat of the hot water of the air-cooled host comes from the condensation heat of the equipment itself. If this part of the condensation heat is not used in the air-conditioning system, it will be discharged to the outdoor space in the form of waste heat. The utility model effectively utilizes the condensation heat of the air-cooled host in the reheating process of air treatment, no longer uses other energy sources, changes the heating method of air reheating, avoids the increase of electric power caused by the use of electric heating sections, and the waste of energy and increase of carbon emissions caused by the combustion of fossil energy, avoids the restrictions of municipal heat sources or self-set heat sources, has the characteristics of simple system structure and high energy utilization efficiency, can effectively provide energy utilization, reduce the carbon emission intensity of the air treatment system, and reduce urban waste heat emissions.

[0027] Optionally, the air-cooled main unit further includes a throttling device 8 and a compressor 9, and the condenser 1, the throttling device 8, the evaporator 2, and the compressor 9 are sequentially connected to form a ring pipeline structure.

[0028] Among them, Figure 2 As shown, the condenser 1, the throttling device 8, the evaporator 2, and the compressor 9 are connected in sequence to form a ring pipeline structure. The evaporator 2 absorbs the heat at the cold water heat exchanger and generates heat at the condenser 1 to realize the heat transfer function.

[0029] Optionally, the cold water coil 5, the hot water coil 6, and the centrifugal fan 7 are connected in sequence, and the cold water coil 5 and the hot water coil 6 are provided with mutually interconnected guide channels, and the centrifugal fan 7 is connected to the guide channels.

[0030] Particularly, the air inlet of the centrifugal fan 7 is communicated with the guide channel.

[0031] Among them, the guide channels of the cold water coil 5 and the hot water coil 6 form an air duct structure. When cooling, the cold water coil 5 can work, the centrifugal fan 7 can draw air, and the air can be cooled by the cold water coil 5 to achieve the effect of air drying and cooling. When heating, the cold water coil 5 and the hot water coil 6 can both work, the cold water coil 5 cools and dries the air, and the hot water coil 6 heats the dried air to form hot air.

[0032] Optionally, the system further includes a hot water electric valve 10 and a hot water solenoid valve 11, the water inlet end of the hot water coil 6 is connected to the water outlet end of the first heat exchanger 3 through the hot water electric valve 10, and the water outlet end of the hot water coil 6 is connected to the water inlet end of the first heat exchanger 3 through the hot water solenoid valve 11. The system further includes a cold water electric valve 12 and a cold water solenoid valve 13, the water inlet end of the cold water coil 5 is connected to the water outlet end of the second heat exchanger 4 through the cold water electric valve 12, and the water outlet end of the cold water coil 5 is connected to the water inlet end of the second heat exchanger 4 through the cold water solenoid valve 13.

[0033] The water outlet of the hot water heat exchanger is connected to the water inlet of the hot water coil 6, with a hot water electric valve 10 installed therebetween; the water outlet of the hot water coil 6 is connected to the water inlet of the hot water heat exchanger, with a hot water solenoid valve 11 installed therebetween. The water outlet of the evaporator 2 is connected to the water inlet of the cold water coil 5, with a cold water electric valve 12 installed therebetween; the water outlet of the cold water coil 5 is connected to the water inlet of the evaporator 2, with a cold water solenoid valve 13 installed therebetween.

[0034] When the cold water solenoid valve 13 is opened, the cold water electric valve 12 is opened, and the hot water solenoid valve 11 is closed, and the hot water electric valve 10 is closed, cold air is generated.

[0035] When the cold water solenoid valve 13 is closed and the cold water electric valve 12 is closed, the hot water solenoid valve 11 is opened and the hot water electric valve 10 is opened to generate hot air.

[0036] When the cold water solenoid valve 13 is opened, the cold water electric valve 12 is opened, the hot water solenoid valve 11 is opened, and the hot water electric valve 10 is opened, that is, the humidity of the air meets the air supply condition and the temperature is lower than the air supply condition after passing through the cold water coil 5, and the air is heated by the hot water coil 6 to meet the air supply condition.

[0037] In summary, the air-cooled host of the system in the embodiment of the utility model can realize simultaneous cooling and heating throughout the year. Figure 1 Compared with the traditional air conditioning treatment system, the present invention does not need to independently set up a whole set of year-round heat source systems, and the corresponding equipment investment, equipment room, and operation and maintenance costs can be eliminated, reducing costs and carbon emission intensity.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the specification of this application, the technicians can still modify or replace the specific implementation mode of the utility model with equivalents, but these modifications or changes do not deviate from the scope of protection of the pending claims of the utility model application.

Claims

1. A four-pipe air handling system for simultaneous cooling and heating throughout the year, characterized in that: The system comprises: an air-cooled host, a four-pipe air handler; The air-cooled host is composed of a condenser, an evaporator, a first heat exchanger, and a second heat exchanger. The first heat exchanger and the condenser form a hot water heat exchange structure, and the second heat exchanger and the evaporator form a cold water heat exchange structure. The air handler is composed of a cold water coil, a hot water coil, and a centrifugal fan. The hot water coil is connected to a first heat exchanger pipeline, and the cold water coil is connected to a second heat exchanger pipeline.

2. A four-pipe air handling system for simultaneous cooling and heating throughout the year according to claim 1, characterized in that: The air-cooled main unit also includes a throttling device and a compressor. The condenser, throttling device, evaporator and compressor are connected in sequence to form a ring pipeline structure.

3. A four-pipe air handling system for simultaneous cooling and heating throughout the year according to claim 1, characterized in that: The cold water coil, the hot water coil and the centrifugal fan are connected in sequence. The cold water coil and the hot water coil are provided with mutually connected flow guide channels, and the centrifugal fan is connected with the flow guide channels.

4. A four-pipe air handling system for simultaneous cooling and heating throughout the year according to claim 3, characterized in that: The air inlet of the centrifugal fan is communicated with the flow guide channel.

5. A four-pipe air handling system for simultaneous cooling and heating throughout the year according to claim 1, characterized in that: The system also includes a hot water electric valve and a hot water solenoid valve. The water inlet end of the hot water coil is connected to the water outlet end of the first heat exchanger through the hot water electric valve, and the water outlet end of the hot water coil is connected to the water inlet end of the first heat exchanger through the hot water solenoid valve.

6. A four-pipe air handling system for simultaneous cooling and heating throughout the year according to claim 1, characterized in that: The system also includes a cold water electric valve and a cold water solenoid valve. The water inlet end of the cold water coil is connected to the water outlet end of the second heat exchanger through the cold water electric valve, and the water outlet end of the cold water coil is connected to the water inlet end of the second heat exchanger through the cold water solenoid valve.

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