Energy-saving fresh air handling unit

Abstract

This utility model discloses an energy-saving fresh air handling unit, including an indoor section located indoors and an outdoor section located outdoors. The indoor section includes a chilled / heated water section, an evaporator section, a condenser section, and a centrifugal fan. The evaporator section and the condenser section form a circulation loop. The outdoor section includes a vacuum heat collection section, which is exposed to sunlight and contains zeolite molecular sieves. The vacuum heat collection section is connected to the circulation loop formed by the evaporator section and the condenser section via pipelines. This utility model uses solar-powered zeolite molecular sieves combined with heat exchange in the chilled / heated water section, which can provide more cooling capacity to the unit, reduce power consumption, and thus reduce electrical load.

Description

Technical Field

[0001] This utility model relates to the field of marine fresh air handling systems, specifically an energy-saving fresh air handling unit. Background Technology

[0002] Currently, marine air handling units primarily utilize chilled or heated water to exchange heat with fresh air, and then use centrifugal fans to deliver the cooled or heated air into the room. In the summer marine environment, when the unit is in cooling mode, it relies on heat exchange coils to exchange heat with the fresh air, requiring the centrifugal fans to consume energy to provide power. However, the temperature and humidity on board are high in summer, and the unit needs to consume more electricity to control the temperature and humidity of the fresh air to the target values, which increases the unit's electrical load. Utility Model Content

[0003] This invention provides an energy-saving fresh air handling unit to solve the problem of high electrical load in existing marine fresh air handling units.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An energy-saving fresh air handling unit includes an indoor section located indoors and an outdoor section located outdoors. The indoor section includes a hot and cold water section (1), an evaporator section (2), a condenser section (6), and a centrifugal fan (4-2). The evaporator section (2) and the condenser section (6) are connected to form a circulation loop. Fresh air passes through the evaporator section (2) and the hot and cold water section (1) for heat exchange in sequence, and is then sent into the room by the centrifugal fan (4-2). The outdoor section includes a vacuum heat collection section (3). The vacuum heat collection section (3) is exposed to sunlight. The vacuum heat collection section (3) contains zeolite molecular sieves, which are used to adsorb or desorb water vapor. The vacuum heat collection section (3) is connected to the circulation loop formed by the evaporator section (2) and the condenser section (6) through a pipeline.

[0006] Furthermore, the evaporator section (2) includes an evaporator (2-1), and the condenser section (6) includes a condenser (6-2); one end of the evaporator (2-1) is connected to one end of the condenser (6-2) through a pipe with a stop valve (2-3), the other end of the evaporator (2-1) is connected to a stop valve (2-2), and the other end of the condenser (6-2) is connected to a stop valve (6-1), and the stop valves (2-2) and (6-1) are connected by a pipe to form a loop; the vacuum heat collection section (3) is connected to the pipe between the stop valves (2-2) and (6-1) through a bypass pipe.

[0007] Furthermore, the vacuum heat collection section (3) includes a vacuum heat collection tube group (3-1), which contains a zeolite molecular sieve. Each vacuum heat collection tube in the vacuum heat collection tube group (3-1) is connected to the circulation loop at one end.

[0008] Furthermore, it also includes an electrical control system (5) and a temperature and humidity sensor (4-5). The temperature and humidity sensor (4-5) is used to collect the temperature and humidity of the fresh air sent into the room by the centrifugal fan (4-2). The temperature and humidity sensor (4-5) is connected to the signal input terminal of the electrical control system (5), and the signal output terminal of the electrical control system (5) is connected to the control terminal of the centrifugal fan (4-2).

[0009] Furthermore, it also includes an air filter (4-3), through which fresh air is filtered before flowing to the evaporator section (2).

[0010] In this invention, taking advantage of the characteristics of the marine environment, a solar-powered zeolite molecular sieve is used in conjunction with a hot and cold water section for heat exchange, which can provide more cooling capacity to the unit. Temperature and humidity sensors measure the fresh air temperature and the centrifugal fan speed is adjusted by the electrical control system to reduce the power consumption of the centrifugal fan, thereby reducing the electrical load.

[0011] The adsorbent-refrigerant working fluid pair selected in this invention is zeolite molecular sieve-water. This working fluid pair has advantages such as wide availability of raw materials, low cost, and environmental friendliness. Furthermore, the COP of the adsorption-refrigeration system is 0.4 at a desorption temperature of 200℃. During the day, under strong sunlight at sea, the zeolite molecular sieve in the vacuum collector tube assembly desorbs water vapor, which condenses into liquid water in the condenser. At night, the zeolite molecular sieve in the vacuum collector tube assembly absorbs water vapor from the evaporator, and the evaporation of water in the evaporator generates cooling. The hot and cold water section directly cools the fresh air. In refrigeration mode, the fresh air is cooled by the zeolite molecular sieve and the evaporator section. Temperature and humidity sensors measure the temperature and humidity of the fresh air, and the feedback from the electrical control system adjusts the centrifugal fan speed, reducing the power consumption of the centrifugal fan and thus achieving energy-saving operation.

[0012] Compared with the prior art, the advantages of this utility model are:

[0013] 1. Based on the original fresh air handling unit, this utility model adds an evaporator section, a condenser section, and a vacuum heat collection tube section that operate on the working principle of solar-driven adsorption refrigeration. This refrigeration cycle is energy-saving, environmentally friendly, and reliable in operation. Under the unit's refrigeration conditions, the evaporator can provide cooling capacity simultaneously with the heat exchange coil.

[0014] 2. The vacuum heat collection tube section of this utility model adopts a vacuum heat collection tube assembly, which can improve the efficiency of the adsorption refrigeration cycle and enable the evaporator to output more cooling capacity.

[0015] 3. In the cooling mode, the temperature and humidity sensor measures the humidity of the fresh air, and the electrical control system adjusts the speed of the centrifugal fan according to the temperature and humidity feedback of the user's needs, thereby reducing the power consumption of the centrifugal fan, thus alleviating the power shortage problem on board and realizing the energy-saving operation of the unit.

[0016] 4. This utility model has low manufacturing cost, widely available adsorbent materials, simple principle, easy control, and is low-carbon and environmentally friendly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1 As shown, this embodiment discloses an energy-saving fresh air handling unit, including an indoor section 7 located indoors and an outdoor section 8 located outdoors.

[0020] The indoor section 7 includes an air conditioning ventilation section 4, a chilled / heated water section 1, an evaporator section 2, a condenser section 6, and a centrifugal fan 4-2. The front end of the air conditioning ventilation section 4 is an air inlet, and one side of the air conditioning ventilation section 4 opens into the room to form an air outlet. A fresh air side valve 4-4 is installed at the air inlet of the air conditioning ventilation section 4.

[0021] Evaporator section 2 includes evaporator 2-1, which is located in air conditioning ventilation section 4 near the air inlet and behind fresh air side valve 4-4. An air filter 4-3 is provided between evaporator 2-1 and fresh air side valve 4-4 in the air inlet of air conditioning ventilation section 4.

[0022] The hot and cold medium water section 1 includes hot and cold medium water pipelines, which include heat exchange coil 1-2, inlet pipe, outlet pipe, and three-way electric valve 1-1. Heat exchange coil 1-2 is located after evaporator 2-1 in evaporator section 2. One end of heat exchange coil 1-2 is connected to one port of electric valve 1-1, and the other end is connected to the inlet pipe. The other port of electric valve 1-1 is connected to the outlet pipe, and the third port of electric valve 1-1 is connected to the inlet pipe via a bypass. The inlet and outlet pipes lead to external hot and cold medium water sources. Water from these sources flows through the inlet pipe, heat exchange coil 1-2, and electric valve 1-1, then returns to the source through the outlet pipe. The electric valve 1-1 can switch the water flow direction, directing water to heat exchange coil 1-2 or directly back to the source. Marine thermometers 1-3 are installed in the pipes at both ends of the heat exchange coil 1-2. Marine thermometers 1-3 are used to detect the inlet and outlet water temperatures of the heat exchange coil 1-2. A water pressure gauge 1-4 is installed in the inlet pipe. Water pressure gauge 1-4 is used to detect the water pressure entering the heat exchange coil 1-2.

[0023] An air supply side valve 4-1 is installed at the air outlet of the air conditioning ventilation section 4. A centrifugal fan 4-2 is located in the air conditioning ventilation section 4 near the air supply side valve 4-1. A temperature and humidity sensor 4-5 is installed between the centrifugal fan 4-2 and the air supply side valve 4-1.

[0024] Fresh air flows sequentially through the evaporator 2-1 in evaporator section 2 and the heat exchange coil 1-2 in hot and cold water section 1. After exchanging heat with the evaporator 2-1 and the heat exchange coil 1-2, it is sent into the room by centrifugal fan 4-2. Temperature and humidity sensor 4-5 detects the temperature and humidity of the fresh air sent into the room by centrifugal fan 4-2.

[0025] The condenser section 6 includes a condenser 6-2. One end of the evaporator 2-1 is connected to one end of the condenser 6-2 through a pipe with a stop valve 2-3. The other end of the evaporator 2-1 is connected to a stop valve 2-2, and the other end of the condenser 6-2 is connected to a stop valve 6-1. The stop valves 2-2 and 6-1 are connected by a pipe, thus forming a circulation loop.

[0026] The outdoor section 8 includes a vacuum heat collection section 3, which includes a vacuum heat collection tube assembly 3-1. The vacuum heat collection tube assembly 3-1 contains zeolite molecular sieves and is exposed to sunlight. Each vacuum heat collection tube in the vacuum heat collection tube assembly 3-1 is connected at one end to form a common pipeline between the evaporator 2-1 and the condenser 6-2, forming a circulation loop between the second shut-off valve 2-2 and the third shut-off valve 6-1.

[0027] This embodiment also includes an electrical control system 5. Temperature and humidity sensors 4-5, marine thermometers 1-3, and water pressure gauges 1-4 are respectively connected to the signal input terminals of the electrical control system 5. The signal output terminals of the electrical control system 5 are respectively connected to the control terminals of centrifugal fans 4-2 and three-way electric valves 1-1.

[0028] In the vacuum collector section 3, the vacuum collector tube assembly 3-1 is placed in an outdoor environment. During the day, when the sunlight intensity is high, shut-off valves 2-2 and 2-3 are closed, and shut-off valve 6-1 is opened. The zeolite molecular sieve adsorbent in the vacuum collector tube assembly 3-1 desorbs water vapor, which is condensed into liquid water in the condenser 6-2. At night, when the unit is in cooling mode, shut-off valves 2-3 and 6-1 are closed, and shut-off valve 2-2 is opened. The zeolite molecular sieve adsorbent in the vacuum collector tube assembly 3-1 begins to adsorb water vapor. The water vapor in the evaporator 2-1 evaporates, absorbs heat, generates cooling capacity, and cools the fresh air. When the water storage in the evaporator 2-1 is too low and the water storage in the condenser 6-2 is too high, shut-off valve 2-3 can be opened to replenish the water storage in the condenser 6-2 to the evaporator 2-1. When the unit is operating in cooling mode, refrigerant water flows through heat exchange coil 1-2, and the flow rate is controlled by electric valve 1-1. Fresh air enters through air valve 4-4 and undergoes primary filtration through air filter 4-3. After filtration, the fresh air passes through evaporator 2-1 and heat exchange coil 1-2 in sequence to be cooled. Under the suction of centrifugal fan 4-2, it passes through temperature and humidity sensor 4-5, thus achieving the cooling of the fresh air. Temperature and humidity sensor 4-5 measures the temperature and humidity of the fresh air. The electrical control system 5 compares the user's required temperature and humidity with the signal transmitted by temperature and humidity sensor 4-5, and adjusts the speed of centrifugal fan 4-2 accordingly, which can reduce fan power consumption and thus achieve energy-saving operation of the unit.

[0029] The preferred embodiments of this utility model have been described in detail above with reference to the accompanying drawings. These embodiments are merely descriptions of preferred embodiments and are not intended to limit the concept and scope of this utility model. The various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. Such combinations, as long as they do not violate the spirit of this utility model, should also be considered as part of this disclosure. To avoid unnecessary repetition, this utility model will not further describe all possible combinations.

[0030] This utility model is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this utility model and without departing from the design idea of ​​this utility model, all modifications and improvements made by those skilled in the art to the technical solution of this utility model should fall within the protection scope of this utility model. The technical content for which protection is sought in this utility model has been fully recorded in the claims.

Claims

1. An energy-saving fresh air handling unit, characterized in that, It includes an indoor section located indoors and an outdoor section located outdoors. The indoor section includes a hot and cold water section (1), an evaporator section (2), a condenser section (6), and a centrifugal fan (4-2). The evaporator section (2) and the condenser section (6) are connected to form a circulation loop. Fresh air passes through the evaporator section (2) and the hot and cold water section (1) for heat exchange in sequence, and is then sent into the room by the centrifugal fan (4-2). The outdoor section includes a vacuum heat collection section (3). The vacuum heat collection section (3) is exposed to sunlight. The vacuum heat collection section (3) contains zeolite molecular sieves, which are used to adsorb or desorb water vapor. The vacuum heat collection section (3) is connected to the circulation loop formed by the evaporator section (2) and the condenser section (6) through pipelines.

2. The energy-saving fresh air handling unit according to claim 1, characterized in that, The evaporator section (2) includes an evaporator (2-1), and the condenser section (6) includes a condenser (6-2). One end of the evaporator (2-1) is connected to one end of the condenser (6-2) through a pipe with a stop valve (2-3). The other end of the evaporator (2-1) is connected to a stop valve (2-2), and the other end of the condenser (6-2) is connected to a stop valve (6-1). The stop valves (2-2) and (6-1) are connected through a pipe to form a loop. The vacuum heat collection section (3) is connected to the pipe between the stop valves (2-2) and (6-1) through a bypass pipe.

3. The energy-saving fresh air handling unit according to claim 1, characterized in that, The vacuum heat collection section (3) includes a vacuum heat collection tube group (3-1), which contains a zeolite molecular sieve. Each vacuum heat collection tube in the vacuum heat collection tube group (3-1) is connected to the circulation loop at one end.

4. The energy-saving fresh air handling unit according to any one of claims 1-3, characterized in that, It also includes an electrical control system (5) and a temperature and humidity sensor (4-5). The temperature and humidity sensor (4-5) is used to collect the temperature and humidity of the fresh air sent into the room by the centrifugal fan (4-2). The temperature and humidity sensor (4-5) is connected to the signal input terminal of the electrical control system (5), and the signal output terminal of the electrical control system (5) is connected to the control terminal of the centrifugal fan (4-2).

5. The energy-saving fresh air handling unit according to any one of claims 1-3, characterized in that, It also includes an air filter (4-3), through which fresh air is filtered before flowing to the evaporator section (2).

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