Energy-saving fresh air handling unit

Abstract

The invention discloses an energy-saving fresh air handling unit. The energy-saving fresh air handling unit comprises an indoor part arranged indoors and an outdoor part arranged outdoors. The indoor part comprises a cold and hot medium 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 part comprises a vacuum heat collection section, the vacuum heat collection section is irradiated by sunlight, and a zeolite molecular sieve is arranged in the vacuum heat collection section. And the vacuum heat collection section is communicated with a circulation loop formed by the evaporator section and the condenser section through a pipeline. The zeolite molecular sieve driven by solar energy is combined with a cold and hot medium water section for heat exchange, so that more cooling capacity can be provided for the unit, the power consumption is reduced, and the electric load is reduced.

Description

Technical Field

[0001] The present invention relates to the field of marine fresh air handling systems, and more particularly to an energy-saving fresh air handling unit. Background Art

[0002] At present, marine fresh air handling units mainly use chilled and heated medium water to exchange heat with fresh air, and then use a centrifugal fan to send the cooled and heated air into the room. In the summer marine environment, under the refrigeration condition, the unit relies on the heat exchange coil to exchange heat with the fresh air, and the centrifugal fan needs to consume energy to provide power. Moreover, in the summer, the temperature and humidity on the ship are relatively high. The unit needs to consume more electric energy to control the temperature and humidity of the fresh air to the target value, which will increase the electrical load of the unit. Summary of the Invention

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

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows: An energy-saving fresh air handling unit includes an indoor part arranged indoors and an outdoor part arranged outdoors; the indoor part includes a chilled and heated medium water section (1), an evaporator section (2), a condenser section (6), and a centrifugal fan (4-2). Among them, the evaporator section (2) and the condenser section (6) are connected to form a circulation loop. Fresh air is sequentially exchanged heat with the evaporator section (2) and the chilled and heated medium water section (1), and then sent into the room through the centrifugal fan (4-2); the outdoor part includes a vacuum heat collection section (3). The vacuum heat collection section (3) is irradiated by sunlight, and there is zeolite molecular sieve in the vacuum heat collection section (3). The zeolite molecular sieve is used to adsorb or desorb water vapor, and 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.

[0005] Further, 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 pipeline with a stop valve (2-3). The other end of the evaporator (2-1) is connected with a stop valve (2-2), and the other end of the condenser (6-2) is connected with a stop valve (6-1). Moreover, the stop valve (2-2) and the stop valve (6-1) are connected through a pipeline, thus forming a circulation loop; the vacuum heat collection section (3) is connected to the pipeline between the stop valve (2-2) and the stop valve (6-1) through a pipeline bypass.

[0006] Further, the vacuum heat collection section (3) includes a vacuum heat collection pipe group (3-1). There is zeolite molecular sieve in the vacuum heat collection pipe group (3-1). One end of each vacuum heat collection pipe in the vacuum heat collection pipe group (3-1) is combined into one path and connected to the circulation loop.

[0007] Further, it further 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 end of the electrical control system (5), and the signal output end of the electrical control system (5) is connected to the control end of the centrifugal fan (4-2).

[0008] Further, it further includes an air filter (4-3). The fresh air flows to the evaporator section (2) after being filtered by the fresh air filter (4-3).

[0009] In the present invention, by utilizing the characteristics of the marine environment, using a solar-driven zeolite molecular sieve and combining heat exchange with the cold and hot medium water section, more cooling capacity can be provided for the unit. The temperature and humidity sensor measures the temperature of the fresh air, and the electrical control system feedback-adjusts the rotation speed of the centrifugal fan, reducing the power consumption of the centrifugal fan, thereby reducing the electrical load.

[0010] The adsorbent-refrigerant working pair selected in the present invention is zeolite molecular sieve-water. This working pair has the advantages of wide raw material sources, low cost, environmental protection, etc. When the desorption temperature is 200°C, the COP of the adsorption refrigeration system is 0.4. During the day, with a relatively large light intensity at sea, the zeolite molecular sieve in the vacuum heat pipe group desorbs water vapor, which condenses into liquid water in the condenser; at night, the zeolite molecular sieve in the vacuum heat pipe group absorbs the water vapor in the evaporator, and the water in the evaporator evaporates to generate cooling capacity; the cold and hot medium water section directly cools the fresh air; in the refrigeration condition, the fresh air is cooled by the zeolite molecular sieve and the evaporator section. The temperature and humidity sensor measures the temperature and humidity of the fresh air, and the electrical control system feedback-adjusts the rotation speed of the centrifugal fan, reducing the power consumption of the centrifugal fan, thereby realizing energy-saving operation.

[0011] Compared with the prior art, the advantages of the present invention are as follows: 1. Based on the original fresh air handling unit, the present invention adds an evaporator section, a condenser section, and a vacuum heat pipe section that operate based on the working principle of solar-driven adsorption refrigeration. This refrigeration cycle is energy-saving, environmentally friendly, and operates reliably. In the refrigeration condition of the unit, this evaporator can provide cooling capacity simultaneously with the heat exchange coil. 2. The vacuum heat pipe section of the present invention adopts a vacuum heat pipe group, which can improve the efficiency of the adsorption refrigeration cycle and enable the evaporator to output more cooling capacity. 3. In the refrigeration condition, the temperature and humidity sensor measures the humidity of the fresh air, and the electrical control system feedback-adjusts the rotation speed of the centrifugal fan according to the required temperature and humidity of the user, reducing the power consumption of the centrifugal fan, thereby alleviating the problem of power shortage on board and realizing the energy-saving operation of the unit. 4. The present invention has low manufacturing cost, wide sources of adsorbent materials, simple principle, convenient control, and is low-carbon and environmentally friendly. Description of the Drawings

[0012] Figure 1 This is the structural schematic diagram of an embodiment of the present invention. Specific Embodiments

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] As Figure 1 shown, this embodiment discloses an energy-saving fresh air handling unit, which includes an indoor part 7 arranged indoors and an outdoor part 8 arranged outdoors.

[0015] The indoor part 7 includes an air-conditioning ventilation section 4, a cold and hot medium 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, one side of the air-conditioning ventilation section 4 leads to the room to form an air outlet, and a fresh air side air valve 4-4 is installed at the air inlet of the air-conditioning ventilation section 4.

[0016] The evaporator section 2 includes an evaporator 2-1, which is arranged in the air-conditioning ventilation section 4 near the air inlet and behind the fresh air side air valve 4-4, and an air filter 4-3 is provided between the evaporator 2-1 and the fresh air side air valve 4-4 in the air inlet of the air-conditioning ventilation section 4.

[0017] The cold and hot medium water section 1 includes a cold and hot medium water pipeline, which includes a heat exchange coil 1-2, an inlet pipeline, an outlet pipeline, and a three-way electric valve 1-1. The heat exchange coil 1-2 is arranged behind the evaporator 2-1 in the evaporator section 2. One end of the heat exchange coil 1-2 is connected to one valve port of the electric valve 1-1, the other end of the heat exchange coil 1-2 is connected to the inlet pipeline, the other valve port of the electric valve 1-1 is connected to the outlet pipeline, and the third valve port of the electric valve 1-1 is connected to the inlet pipeline through a pipeline bypass. The inlet pipeline and the outlet pipeline respectively lead to the external cold and hot medium water source. Thus, the water from the cold and hot medium water source passes through the inlet pipeline, the heat exchange coil 1-2, the electric valve 1-1 and then returns to the cold and hot medium water source through the outlet pipeline. The flow direction of the water can be switched through the electric valve 1-1 to make the water flow to the heat exchange coil 1-2 or directly return to the cold and hot medium water source. Marine thermometers 1-3 are respectively installed in the pipelines at both ends of the heat exchange coil 1-2, and the 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 pipeline, and the water pressure gauge 1-4 is used to detect the water pressure entering the heat exchange coil 1-2.

[0018] A supply air side air valve 4-1 is installed at the air outlet of the air-conditioning ventilation section 4. The centrifugal fan 4-2 is arranged in the air-conditioning ventilation section 4 near the supply air side air valve 4-1, and a temperature and humidity sensor 4-5 is arranged between the centrifugal fan 4-2 and the supply air side air valve 4-1.

[0019] The fresh air sequentially flows through the evaporator 2-1 of the evaporator section 2 and the heat exchange coil 1-2 of the cold and hot medium water section 1, exchanges heat with the evaporator 2-1 and the heat exchange coil 1-2, and is then sent into the room through the centrifugal fan 4-2. The temperature and humidity sensor 4-5 detects the temperature and humidity of the fresh air sent into the room by the centrifugal fan 4-2.

[0020] 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 pipeline with a stop valve 2-3. The other end of the evaporator 2-1 is connected with a stop valve 2-2. The other end of the condenser 6-2 is connected with a stop valve 6-1. And the stop valve 2-2 and the stop valve 6-1 are connected through a pipeline, thus forming a circulation loop.

[0021] The outdoor part 8 includes a vacuum heat collection section 3. The vacuum heat collection section 3 includes a vacuum heat collection tube group 3-1. There is zeolite molecular sieve in the vacuum heat collection tube group 3-1, and the vacuum heat collection tube group 3-1 is irradiated by sunlight. After one ends of the vacuum heat collection tubes in the vacuum heat collection tube group 3-1 are combined into one path, they are commonly connected and communicated to the pipeline between the stop valve 2-2 and the stop valve 6-1 in the circulation loop formed by connecting the evaporator 2-1 and the condenser 6-2.

[0022] This embodiment further includes an electrical control system 5. The temperature and humidity sensor 4-5, the marine thermometer 1-3, and the water pressure gauge 1-4 are respectively connected to the signal input end of the electrical control system 5. The signal output end of the electrical control system 5 is respectively connected to the control ends of the centrifugal fan 4-2 and the three-way electric valve 1-1.

[0023] In the vacuum heat collection section 3, the vacuum heat pipe group 3-1 in the vacuum heat collection section 3 is placed in the outdoor environment. During the day when the light intensity is high, the stop valve 2-2 and the stop valve 2-3 are closed, and the stop valve 6-1 is opened. The zeolite molecular sieve adsorbent in the vacuum heat pipe group 3-1 desorbs water vapor, which is condensed into liquid water in the condenser 6-2. When the unit operates in the refrigeration mode at night, the stop valve 2-3 and the stop valve 6-1 are closed, and the stop valve 2-2 is opened. The zeolite molecular sieve adsorbent in the vacuum heat pipe group 3-1 starts to adsorb water vapor. The water vapor in the evaporator 2-1 evaporates to absorb heat to generate cold and cool the fresh air. When the water storage volume in the evaporator 2-1 is too small and the water storage volume in the condenser 6-2 is too large, the stop valve 2-3 can be opened to supplement the water stored in the condenser 6-2 to the evaporator 2-1. When the unit operates in the refrigeration mode, the refrigerant water flows through the heat exchange coil 1-2, and the flow rate of the refrigerant water is controlled by the electric valve 1-1. The fresh air enters through the air valve 4-4 and is initially filtered by the air filter 4-3. After filtration, the fresh air is cooled successively through the evaporator 2-1 and the heat exchange coil 1-2, and passes through the temperature and humidity sensor 4-5 under the suction of the centrifugal fan 4-2, realizing the cooling of the fresh air. The temperature and humidity sensor 4-5 measures the temperature and humidity of the fresh air. The electrical control system 5 compares the transmitted signal of the temperature and humidity sensor 4-5 with the required temperature and humidity of the user, and feedback-adjusts the rotation speed of the centrifugal fan 4-2, which can reduce the power consumption of the fan, thereby realizing the energy-saving operation of the unit.

[0024] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. The embodiments described in the present invention are only descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. Among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without contradiction. As long as such a combination does not violate the idea of the present invention, it should also be regarded as the content disclosed in this disclosure. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0025] The present invention is not limited to the specific details in the above embodiments. Within the technical concept scope of the present invention and without departing from the design idea of the present invention, various modifications and improvements made by those skilled in the art to the technical solution of the present invention should all fall within the protection scope of the present invention. The technical content requested to be protected by the present invention has been fully recorded in the claims.

Claims

1. An energy-saving fresh air air handling unit, characterized in that: The invention comprises an indoor part arranged indoors and an outdoor part arranged outdoors; the indoor part comprises a cold and hot medium water section (1), an evaporator section (2), a condenser section (6), and a centrifugal fan (4-2), wherein the evaporator section (2) and the condenser section (6) are connected to form a circulation loop, and fresh air is sequentially sent into the room through the centrifugal fan (4-2) after heat exchange through the evaporator section (2) and the cold and hot medium water section (1); the outdoor part comprises a vacuum heat collection section (3), the vacuum heat collection section (3) is exposed to sunlight, a zeolite molecular sieve is contained in the vacuum heat collection section (3), the zeolite molecular sieve is used to adsorb or desorb water vapor, and 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.

2. An energy-saving fresh air air handling unit according to claim 1, characterized in that: The evaporator section (2) comprises an evaporator (2-1), and the condenser section (6) comprises a condenser (6-2); one end of the evaporator (2-1) is connected to one end of the condenser (6-2) via a pipeline with a stop valve (2-3), the other end of the evaporator (2-1) is connected to the stop valve (2-2), the other end of the condenser (6-2) is connected to the stop valve (6-1), and the stop valve (2-2) and the stop valve (6-1) are connected via a pipeline, thereby forming a circulation loop; the vacuum heat collection section (3) is connected to the pipeline between the stop valve (2-2) and the stop valve (6-1) via a pipeline bypass.

3. The energy-saving fresh air handling unit according to claim 1, characterized in that: The vacuum heat collection section (3) comprises a vacuum heat collection tube group (3-1), wherein the vacuum heat collection tube group (3-1) contains a zeolite molecular sieve, and one end of each vacuum heat collection tube in the vacuum heat collection tube group (3-1) is combined into one path and connected to the circulation loop.

4. An energy-saving fresh air air handling unit according to any one of claims 1 to 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 end of the electrical control system (5), and the signal output end of the electrical control system (5) is connected to the control end of the centrifugal fan (4-2).

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

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