Novel refrigeration and dehumidification device

Abstract

The utility model discloses a novel refrigeration and dehumidification device which comprises a shell with an air inlet formed in one end and an air outlet formed in the other end, and a first heat exchanger, a moisture adsorption and desorption unit, a second heat exchanger and a third heat exchanger are sequentially arranged in the shell from the air inlet to the air outlet. The first heat exchanger, the second heat exchanger and the third heat exchanger are all communicated with a four-way valve through refrigerant pipelines, the four-way valve is communicated with an outdoor compressor through a refrigerant pipeline, the third heat exchanger is communicated with a stop valve, and the first heat exchanger is communicated with the second heat exchanger through an expansion valve and a refrigerant pipeline. The compressor is further communicated with a fourth heat exchanger, and the fourth heat exchanger and the third heat exchanger are connected in parallel through a three-way pipe and then communicated with the four-way valve. According to the utility model, the efficient operation of the industrial dehumidification equipment in a medium-low temperature environment can be ensured, and effective dehumidification can be carried out while defrosting is carried out, so that the energy consumption of the equipment is reduced, and the purposes of energy conservation and emission reduction are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an air dehumidification device, especially to a novel refrigeration dehumidification device. BACKGROUND

[0002] Under normal temperature environment, the energy-saving effect of heat pump type dehumidification system is relatively obvious, but the dehumidification capacity of heat pump type dehumidification system will decrease when dehumidifying under low temperature environment. The main reason is that the evaporator needs to be defrosted after frosting, and the system cannot dehumidify during defrosting, which is high in energy consumption. In addition, the adsorption type dehumidification system can dehumidify deeply under low temperature environment, but it needs to use 60 DEG C or above regeneration air to desorb the rotary wheel, usually uses an electric heater for heating, and it is difficult to achieve energy-saving effect.

[0003] The basic principle of condensing dehumidification is to use the cooling effect of refrigerant, to reduce the temperature of air (to reach the dew point temperature), to make the water vapor in the air condense into water droplets, and then to collect them, so as to achieve the effect of dehumidification, the specific process is as follows:

[0004] Cooling process: humid air first enters the evaporator (cooler). The inside of the evaporator pipe is full of refrigerant, which will absorb the heat in the air, making the temperature of the air drop rapidly.

[0005] Water condensation: as the temperature of the air drops, when the temperature drops below the dew point temperature, the water vapor in the air will begin to condense into water droplets. These water droplets will adhere to the surface of the cooler and gradually accumulate in the condensing disc.

[0006] Drainage process: the condensed water droplets are discharged to the outdoor through the drainage pipe, or according to the design of the dehumidifier, they can be collected indoors.

[0007] Heating (optional): in order to prevent the temperature of the dehumidified air from being too low, some dehumidifiers will slightly heat during the dehumidification process, making the treated air more comfortable.

[0008] Air supply: finally, the dry air treated by cooling, dehumidification (sometimes including heating) is sent back to the indoor, thereby effectively reducing the humidity in the indoor.

[0009] As Figure 1As shown, the mixed low-temperature frostless dehumidification system is composed of a heat exchanger 1, a heat exchanger 2, an adsorption and desorption dehumidification module, a four-way valve, an expansion valve, a compressor and the like. The adsorption and desorption dehumidification module is located between the heat exchanger 1 and the heat exchanger 2, and the four-way valve switches the evaporator function and the condenser function of the heat exchanger 1 and the heat exchanger 2 every certain time. The adsorbent loaded in the adsorption and desorption dehumidification module is a high-molecular adsorbent material that can be regenerated at low temperature. The adsorption and desorption dehumidification module can be regenerated by using the heat exhaust of the condenser defrosting, thereby increasing the dehumidification capacity and improving the energy efficiency of the system. When the system performs the adsorption process, the heat exchanger 1 serves as an evaporator and the heat exchanger 2 serves as a condenser. When the air with high humidity flows into the heat exchanger 1, the air is condensed and dehumidified, then flows through the adsorption and desorption unit, and the moisture in the air is further adsorbed and removed, then the low-temperature and low-humidity air is heated in the heat exchanger 2, and finally is sent into the room. When the system performs the desorption process, the heat exchanger 2 serves as an evaporator and the heat exchanger 1 serves as a condenser. When the air flows through the heat exchanger 1, the air is heated. When the heated air passes through the adsorption and desorption unit, the water molecules adsorbed in the adsorption mode are desorbed into the air, thereby humidifying the air to become high-humidity air. The high-humidity air is then condensed and dehumidified in the heat exchanger 2, and finally the low-temperature and low-humidity air is sent into the room.

[0010] Although the mixed low-temperature frostless dehumidification system can solve the defrosting problem, the following problems still exist: (1) In order to maintain the optimal design of the system, the size of the evaporator in the air conditioning system is usually much smaller than that of the condenser. However, in the mixed low-temperature frostless dehumidification system, the condenser and the evaporator have the same size; (2) In the desorption process, when the heat exchanger 2 serves as an evaporator to condense and dehumidify, the temperature of the air at the outlet of the heat exchanger 2 is too low, which interferes with the preset temperature of the room. Content of the utility model

[0011] The utility model aims at providing a novel refrigeration and dehumidification device, solving the frost phenomenon of the evaporator in the existing dehumidification system and the efficiency reduction problem caused by the defrosting operation.

[0012] Technical scheme: The novel refrigeration and dehumidification device comprises a shell body provided with an air inlet at one end and an air outlet at the other end, a first heat exchanger, a water adsorption and desorption unit, a second heat exchanger and a third heat exchanger are sequentially arranged in the shell body from the air inlet to the air outlet, the first heat exchanger, the second heat exchanger and the third heat exchanger are all communicated with a four-way valve through refrigerant pipelines, the four-way valve is communicated with a compressor arranged outdoors through a refrigerant pipeline, a stop valve is communicated with the third heat exchanger, the first heat exchanger and the second heat exchanger are communicated through an expansion valve and a refrigerant pipeline, a fourth heat exchanger is further communicated with the compressor, and the fourth heat exchanger and the third heat exchanger are connected in parallel through a three-way pipe and then communicated with the four-way valve.

[0013] The utility model discloses a split type arrangement, additionally add fourth heat exchanger and third heat exchanger as condenser, dehumidification mainly through indoor air circulation device, balance room heat load mainly through outdoor unit realizes.

[0014] The air outlet is provided with a fan.

[0015] The fourth heat exchanger is provided with a fan.

[0016] The first heat exchanger, the water adsorption and desorption unit, the second heat exchanger and the third heat exchanger are all fixedly connected to the inner wall of the shell.

[0017] The shell is arranged indoors, and the fourth heat exchanger is arranged outdoors.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] The utility model discloses a split type installation, and the effective combination of heat pump system and adsorption and desorption module solves the frost phenomenon of evaporator in heat pump type dehumidification system and the efficiency reduction problem caused by defrosting operation in the existing dehumidification system. The utility model can guarantee the efficient operation of industrial dehumidification equipment in low temperature environment, can effectively dehumidify while defrosting, can reduce the energy consumption of equipment, and can achieve the purpose of energy saving and emission reduction. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the principle schematic drawing of the prior mixed type low temperature frostless dehumidification system;

[0021] Figure 2 And Figure 3 It is the different perspective overall structure schematic drawing of the utility model;

[0022] Figure 4 It is the front view of the utility model;

[0023] Figure 5 It is the top view of the utility model;

[0024] Wherein, 1-first heat exchanger, 2-second heat exchanger, 3-water adsorption and desorption unit, 4-third heat exchanger, 5-compressor, 6-fan, 7-shell, 71-air inlet, 72-air outlet, 8-four-way valve, 81-stop valve, 9-expansion valve, 10-fourth heat exchanger, 11-fan. DETAILED DESCRIPTION

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0026] like Figures 2-5 As shown, a novel refrigeration and dehumidification device includes a housing 7 with an air inlet 71 at one end and an air outlet 72 at the other end. The housing 7 is cylindrical. Inside the housing 7, from the air inlet 71 to the air outlet 72, there are sequentially arranged a first heat exchanger 1, a moisture absorption and desorption unit 3, a second heat exchanger 2, and a third heat exchanger 4. The first heat exchanger 1, the second heat exchanger 2, and the third heat exchanger 4 are all connected to a four-way valve 8 through refrigerant pipes. The four-way valve 8 is connected to a compressor 5 located outdoors through a refrigerant pipe. A shut-off valve 81 is connected to the third heat exchanger 4. The first heat exchanger 1 and the second heat exchanger 2 are connected through an expansion valve 9 and a refrigerant pipe. The compressor 5 is also connected to a fourth heat exchanger 10. The fourth heat exchanger 10 and the third heat exchanger 4 are connected in parallel through a three-way pipe and then connected to the four-way valve 8. Expansion valve 9 is located between the first heat exchanger 1 and the second heat exchanger 2, while four-way valve 8 switches the first heat exchanger 1 and the second heat exchanger 2 between evaporator and condenser functions at regular intervals. The fourth heat exchanger 10 is used as a heat exhaust condenser, and the third heat exchanger 4 is opened and closed according to system requirements via shut-off valve 81, and is used as a condenser.

[0027] The moisture adsorption / desorption unit 3 is equipped with a low-temperature regenerable polymer adsorbent material, which is used to absorb or release moisture from the airflow when the airflow passes through the unit. The moisture adsorption / desorption unit 3 is regenerated by the heat dissipation during condenser defrosting, which can effectively improve the energy efficiency of the system.

[0028] In this embodiment, a fan 6 is provided on the air outlet 72. The fan 6 can drive air to flow unidirectionally from the air inlet 71 to the air outlet 72. During the air flow, it passes sequentially through the first heat exchanger 1, the moisture adsorption and desorption unit 3, the second heat exchanger 2, and the third heat exchanger 4.

[0029] In this embodiment, the fourth heat exchanger 10 is equipped with a fan 11. The fan 11 can better help the fourth heat exchanger 10 dissipate heat.

[0030] In this embodiment, the outer edges of the first heat exchanger 1, the moisture adsorption and desorption unit 3, the second heat exchanger 2, and the third heat exchanger 4 are all fixedly connected to the inner wall of the housing 7, thereby ensuring that the airflow passes through these components in sequence without leakage.

[0031] In this embodiment, the casing 7 is located indoors, and the fourth heat exchanger 10 is located outdoors. The outdoor fourth heat exchanger 10 can share the heat load of the indoor second heat exchanger 2 or the third heat exchanger 4, preventing indoor temperature rise. Working process and principle:

[0032] The regeneration process of the moisture adsorption and desorption unit 3 is completed by alternately circulating the moisture adsorption process and the moisture desorption process, wherein the moisture adsorption process is specifically performed as follows:

[0033] The first heat exchanger 1 is controlled as an evaporator, the second heat exchanger 2 and the fourth heat exchanger 10 are controlled as condensers, and the third heat exchanger 4 is in a closed state. The second heat exchanger 2 as a condenser can properly heat and warm the air. When the high-humidity air flows into the first heat exchanger 1, the air is cooled, condensed and dehumidified. Then, the air flows into the moisture adsorption and desorption unit 3, and the moisture in the air is adsorbed and fixed by the adsorbent in the moisture adsorption and desorption unit 3. The air is further dehumidified when flowing through the moisture adsorption and desorption unit 3. Subsequently, the low-temperature and low-humidity air enters the second heat exchanger 2 and is heated, and finally is sent into the room. The fourth heat exchanger 10 is located outdoors and is used as a condenser. The main function of the fourth heat exchanger 10 is to share the system quantitative heat load with the second heat exchanger 2, and does not increase the heat load in the room, thereby reducing the temperature rise in the room.

[0034] The moisture desorption process is specifically performed as follows:

[0035] Through switching of the four-way valve 8, the first heat exchanger 1 becomes a condenser, the second heat exchanger 2 becomes an evaporator, and the third heat exchanger 4 and the fourth heat exchanger 10 are used as condensers. When the air flows into the first heat exchanger 1, the air is heated. The heated air flows through the moisture adsorption and desorption unit 3 to desorb moisture from the adsorbent. At this time, the adsorbed water molecules in the adsorption mode are desorbed by the hot air, which is equivalent to humidifying the hot air to become high-humidity air entering the second heat exchanger 2. The second heat exchanger 2 condenses and dehumidifies the high-humidity air, and the low-temperature and low-humidity air enters the third heat exchanger 4 and is heated, and finally is sent into the room. The fourth heat exchanger 10 is located outdoors and is also used as a condenser. The main function of the fourth heat exchanger 10 is to share the system quantitative heat load with the third heat exchanger 4, and does not increase the heat load in the room, thereby reducing the temperature rise in the room.

[0036] In the desorption process, the first heat exchanger 1 becomes a condenser, and the condensation heat of the first heat exchanger 1 defrosts the frost generated in the adsorption process. On the other hand, due to the moisture desorption effect of the adsorbent in the moisture adsorption and desorption unit 3, the relative humidity of the air flowing into the second heat exchanger 2 (which functions as an evaporator at this time) is much higher than that of the air flowing into the first heat exchanger 1, thereby increasing the dehumidification amount. That is, compared with the defrosting process which does not dehumidify in the heat pump dehumidification system, the desorption effect of the adsorption and desorption unit can also achieve effective dehumidification, and finally realizes high-efficiency dehumidification.

Claims

1. A novel refrigeration dehumidifying device, characterized by, The application relates to a heat pump air conditioner, which comprises a shell (7) provided with an air inlet (71) at one end and an air outlet (72) at the other end, a first heat exchanger (1), a water adsorption and desorption unit (3), a second heat exchanger (2) and a third heat exchanger (4) arranged in the shell (7) in sequence from the air inlet (71) to the air outlet (72), wherein the first heat exchanger (1), the second heat exchanger (2) and the third heat exchanger (4) are communicated with a four-way valve (8) through refrigerant pipelines, the four-way valve (8) is communicated with a compressor (5) arranged outdoors through a refrigerant pipeline, the third heat exchanger (4) is communicated with a stop valve (81), the first heat exchanger (1) and the second heat exchanger (2) are communicated through an expansion valve (9) and a refrigerant pipeline, the compressor (5) is further communicated with a fourth heat exchanger (10), and the fourth heat exchanger (10) is communicated with the four-way valve (8) after being connected with the third heat exchanger (4) through a three-way pipeline.

2. A novel refrigeration and dehumidification device according to claim 1, characterized in that, A fan (6) is arranged on the air outlet (72).

3. A novel refrigeration and dehumidification device according to claim 1, characterized in that, A fan (11) is arranged on the fourth heat exchanger (10).

4. A novel refrigeration and dehumidification device according to claim 1, characterized in that, The outer edges of the first heat exchanger (1), the water adsorption and desorption unit (3), the second heat exchanger (2) and the third heat exchanger (4) are fixedly connected with the inner wall of the shell (7).

5. The novel refrigeration and dehumidification device according to claim 1, characterized in that, The shell (7) is arranged indoors, and the fourth heat exchanger (10) is arranged outdoors.

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