CN201138102Y - A new return air energy recovery heat pump device with a secondary humidification cooling condenser - Google Patents

Abstract

The utility model discloses a fresh-return-air energy recycling heat-pump device with a secondary moisturizing cooling-typed condenser, which is composed of a compressor, an outdoor finned moisturizing cooling condenser, an evaporator, an inflation valve and other parts; wherein, the outdoor finned moisturizing condenser is composed of a plurality of thermo-moisture treatment components such as a first-level condensing heater, a second-level moisturizing cooler, a third-level condensing heater, etc. The device innovatively moisturizes and decreases the temperature of the air that is heated by the condenser; the air passes through the next-level condenser to be exchanged the heat with a high-temperature refrigeration agent; the water source is condensed water of the evaporator, so that all or part of cooling capacity contained by the evaporator condensed water can be recycled; moreover, 50 percent or more air volume required by the condenser is reduced; the device innovatively uses the heat pump to realize the thorough recycling of the heat of the fresh discharged air; and the heating efficiency can reach 100 percent that is far beyond the heat recycling efficiency of the prior fresh discharged air, thereby having obvious energy-saving benefit. The device realizes the significant jump on two aspects such as the refrigerator unit condensing heat exchanging principle and the application of the condensing heat exchanging principle.

Description

A new return air energy recovery heat pump device with a secondary humidification cooling condenser

technical field

The utility model relates to a new return air energy recovery heat pump device with a secondary humidification and cooling condenser, which uses the condensed water of the evaporator to perform humidification and cooling treatment on the air heated by the condenser, and then passes through the next-stage condenser to meet the high temperature again. Refrigerant heat exchange creatively uses a heat pump to realize full heat recovery of new exhaust air, and belongs to the technical field of refrigeration units and air conditioning treatment processes.

Background technique

As an important method to reduce the energy consumption of building equipment, the heat recovery of new exhaust air has been paid attention to in the field of air conditioning technology, and has been widely promoted and applied in China. However, there are major problems in the application of several main heat recovery methods and equipment at present, so the projects successfully implemented in actual projects are far from reaching the expected goals. For example, the current plate-type new exhaust air heat exchanger generally only performs sensible heat exchange, and the products that realize full heat exchange have organic heat exchange elements that will generate germs and odors. Both types of heat recovery devices have low overall efficiency and large size. , the wind group is too large, which leads to high energy consumption of the fan, the problem of condensation and winter frost is difficult to effectively solve, and the accumulation of a large amount of dust during long-term use leads to serious pollution and high cost. ; Others such as the new exhaust air respectively exchange heat with water and transfer heat through the circulation pipeline and the heat pipe type can only achieve sensible heat exchange, and there are problems such as complicated operation control and the need to avoid freezing and cracking of water pipes in winter. The above-mentioned reasons have led to difficulties in the practical application of new exhaust air heat recovery, such as energy efficiency ratio, economy, and operability, which have seriously affected the actual promotion of this important energy-saving technology.

Applying heat pumps to new exhaust air heat recovery is also an important method, but the energy efficiency ratio of air-cooled condensers is generally relatively low at present, and can only reach 3.0 or slightly more, which is comparable to that of plate and rotary units that can reach above 6. The ratio is too low, this performance index makes it difficult for the heat pump to become the main means of heat recovery from fresh exhaust air. In particular, the characteristic of the refrigeration system is that the heat of condensation is generally 10-30% higher than the cooling capacity of evaporation, and the temperature difference between the inside and outside of the condenser is generally lower than that of the evaporator, and the temperature difference between the inlet and outlet of the cooling air of the condenser is usually higher than that of the evaporator. The cooling air should be small, and the air-cooled cold air type refrigeration unit generally causes the condensing air volume to be 30-100% higher than the evaporating air volume. Usually, the organized exhaust air volume of the air conditioning system is about 10% lower than the fresh air volume, so when the heat pump is applied to the heat recovery of the new exhaust air, if only the limited sensible heat in the exhaust air is absorbed, the cooling and dehumidification capacity of the fresh air will be greatly reduced. Low, unable to take full advantage of the heat recovery of the heat pump.

When it is used for humidification of air conditioning system in winter, since the condensing part of the heat pump can only realize sensible heat heating, another set of humidifier must be installed, which increases the structure size and cost.

At present, the air treatment process of the air conditioning system generally adopts the refrigeration dehumidification method. The cooling of the air and the dehumidification process are coupled to reduce the evaporation temperature of the refrigerator to a very low level to meet the dehumidification needs, resulting in a significant drop in the energy efficiency ratio of the refrigerator, increasing the initial investment and operating costs. .

Contents of the invention

The purpose and task of this utility model is to solve the various problems mentioned above, according to the characteristic that the higher the temperature is, the stronger the moisture absorption capacity will be when the moisture content of the air is constant, creatively humidify the air heated by the condenser to make its temperature It is lowered to a very low temperature along the approximate isenthalpic process, and then passes through the next-stage condenser to exchange heat with the high-temperature refrigerant. The water source is the condensed water of the evaporator that can be considered to contain no calcium and magnesium ions, thus realizing the condensed water of the evaporator. The recycling of all or part of the cooling capacity avoids the fouling problem caused by the direct use of tap water for humidification, and the air volume required by the condenser is reduced by more than 50%. The thermal efficiency can be close to 100%. When the outdoor air temperature is not very high, the total thermal efficiency exceeds 100% because the exhaust air temperature is far higher than the outdoor air temperature, far exceeding the heat recovery efficiency of all new exhaust air at present, and the energy-saving benefit is very significant.

For this reason, the utility model designs a new return air energy recovery heat pump device with a secondary humidification cooling condenser, which consists of a compressor, a condenser, an evaporator, an expansion valve, a four-way valve, a one-way valve group, a storage The condenser is divided into three-stage heat and humidity treatment process. The first stage condenses and heats the indoor exhaust air from room temperature of 20-26°C to 40-50°C. , The second stage humidifies and cools the exhaust air to about 20-26°C, and the third stage heats the exhaust air to 45-50°C by the condenser and discharges it to the outside. The first and third stage condensers use finned heat exchangers, and the second stage humidifiers use ultrasonic humidifiers or atomized spray humidifiers. If necessary, a fourth-stage humidifying cooler and a fifth-stage condensing heater can be installed after the third stage.

The humidification water source in the summer treatment process is the evaporator condensate water, so as to achieve the goal of basically recovering the cooling capacity contained in the condensate water after the fresh air cooling and dehumidification by using the heat pump, that is, the full heat recovery process is completed, and tap water is not wasted.

For the fresh air dehumidification process, the usual wheel-type or plate-type heat recovery device is only a passive dehumidification process, which cannot effectively control the dehumidification level. However, the heat pump heat recovery device of the present utility model can completely realize freezing and independent dehumidification. For the air-conditioning system, it has the following great significance: the cooling host of the central air-conditioning system will greatly increase the chilled water outlet temperature from about 7°C to about 15°C, and the energy efficiency ratio of the central air-conditioning refrigeration unit will be greatly improved. The capacity of related equipment components is greatly reduced, the initial investment and operating costs are greatly reduced, and the dry operation of the indoor fan coil unit can be realized, which completely solves the indoor air pollution caused by the large number of harmful microorganisms in the water receiving pan of the air pan. Pollution and air conditioning disease.

At the same time, if this method is directly used in the design and operation of the air conditioner in winter to realize the heat recovery process of humidification, an additional humidifier can be omitted, and the humidification water source at this time is mainly softened water.

Compared with the existing new exhaust heat recovery device, the utility model has great comprehensive advantages in terms of structural form and size, controllability and reliability of operation adjustment, energy efficiency ratio and economy, such as its energy efficiency ratio in winter It can really reach more than 6-8, and can effectively avoid restrictive problems such as condensation and icing.

The utility model realizes a major breakthrough in two aspects of the refrigeration unit condensation heat exchange principle and application.

Description of drawings

Fig. 1 is respectively the principle schematic diagram of the utility model.

The numbers and names of the parts in Figure 1 are as follows:

Compressor 1, four-way valve 2, outdoor finned humidification and cooling condenser 3, one-way valve group 4+5+6+7, liquid receiver 8, dry filter 9, sight glass 10, expansion valve 11, Evaporator 12, vapor-liquid separator 13, low pressure gauge 14, high pressure gauge 15, evaporator water tray 16, primary condensing heater 17, secondary humidifying cooler 18, tertiary condensing heater 19, secondary humidifying cooling Humidifier water pan 20, humidifier spout 21.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and a specific implementation and application example.

Fig. 1 is a schematic diagram of the principle of the utility model.

The utility model consists of a compressor (1), an outdoor finned humidification cooling condenser (3), an evaporator (12), an expansion valve (11), a four-way valve (2), a one-way valve group (4, 5, 6, 7), liquid receiver (8), dry filter (9), vapor-liquid separator (13) and other accessories, characterized in that the outdoor finned humidification and cooling condenser (3) is heated by one-stage condensation (17), two-stage humidification cooler (18), three-stage condensing heater (19) and other multi-stage heat and humidity treatment components; the outdoor finned humidification cooling condenser (3) fluorine circuit inlet end passes through a four-way valve (2) Connected to the exhaust port of the compressor (1), the outlet port is connected to the one-way valve group (4+5+6+7); the inlet port of the liquid reservoir (8) is connected to the one-way valve group (4+5+ 6+7), the outlet end is connected to the inlet of the drier filter (9); the outlet end of the drier filter (9) is connected to the inlet of the expansion valve (11) through the sight glass (10); the inlet end of the evaporator (12) passes through The one-way valve group (4+5+6+7) is connected to the outlet of the expansion valve (11), and the outlet is connected to the inlet of the vapor-liquid separator (13) through the four-way valve (2); the vapor-liquid separator (13) The outlet end is connected with the suction port of the compressor (1).

The water inlet of the humidification water pan (20) of the outdoor finned humidification cooling condenser (3) secondary humidification cooling device (18) is connected with the water outlet pipe of the evaporator (12) water receiving pan (16), and the water outlet is connected with the humidification The device nozzle (21) is connected. The air inlet end of the secondary humidification cooler (18) is connected with the air outlet end of the first-stage condensation heater (17), and the air outlet end is connected with the third-stage condensation heater (19). The evaporator (12) is located on the upper part of the condenser (2), and the condensed water of the evaporator is transported to the humidification water pan (20) of the secondary humidification cooler through water pipes, and the air is humidified and cooled by the ultrasonic humidification nozzle (21).

The air source heat pump unit manufactured according to the above structure can first use the sensible cooling capacity of the cooling air to cool the high temperature and high pressure refrigerator in the condenser on the side of the condenser. When the air reaches a higher temperature, spray water Humidification and cooling are carried out in the way of humidification, the moisture content in the air is greatly increased, and the temperature is lowered along the approximate isenthalpy line, and then the secondary cooling and heat exchange with the refrigerant is carried out, thereby realizing the condensation heat exchange under the condition of greatly reducing the cooling air volume, And the condensing temperature is much lower than that of conventional air-cooled heat pumps, which greatly improves the condensation situation and the energy efficiency ratio of heat pumps. At the same time, it avoids the need to build a cooling tower for cooling water-cooled heat pumps, saving initial investment and operating costs.

Claims (2)

1, a kind of new return air energy with secondary humidification cooled condenser reclaims heat pump assembly, form by compressor (1), outdoor finned humidification cooler condenser (3), evaporimeter (12), expansion valve (11), cross valve (2), check valve group (4,5,6,7), reservoir (8), device for drying and filtering (9), vapour liquid separator (13) and other accessory, it is characterized in that outdoor finned humidification cooler condenser (3) is made up of one-level condensation heater (17), secondary humidified cooler (18), three grades of condensation heater multistage hot wet process assemblies such as (19); Outdoor finned humidification cooler condenser (3) fluorine road entrance point links to each other with compressor (1) exhaust outlet through cross valve (2), and the port of export links to each other with check valve group (4+5+6+7); Reservoir (8) entrance point links to each other with check valve group (4+5+6+7), and the port of export links to each other with device for drying and filtering (9) import; Device for drying and filtering (9) port of export links to each other with expansion valve (11) import through liquid-sighting glass (10); Evaporimeter (12) entrance point links to each other with expansion valve (11) outlet by check valve group (4+5+6+7), and the port of export links to each other with vapour liquid separator (13) entrance point by cross valve (2); Vapour liquid separator (13) port of export links to each other with compressor (1) air entry.

2, the new return air energy of band secondary humidification cooled condenser as claimed in claim 1 reclaims heat pump assembly, it is characterized in that described outdoor finned humidification cooler condenser (3) secondary humidification cooling device (18) humidification water pond (20) water inlet and evaporimeter (12) drip tray (16) outlet pipe with link to each other, delivery port links to each other with humidifier spout (21), secondary humidified cooler (18) air intake links to each other with one-level condensation heater (17) outlet air end, and outlet air end links to each other with three grades of condensation heaters (19).

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