CN201364007Y - Air source high-temperature heat pump dryer - Google Patents

Abstract

The utility model discloses an air source high temperature heat pump dryer, which comprises a low temperature heat pump system and a high temperature heat pump system, the low-temperature heat pump system comprises a low-temperature heat pump compressor, a first gas-liquid separator, a first fin evaporator, a first throttling device and a first fin condenser which form a circulation loop, the high-temperature heat pump system comprises a high-temperature heat pump compressor, a second gas-liquid separator, a second finned evaporator, a second throttling device and a second finned condenser which form a circulation loop, the second fin evaporator and the first fin evaporator form a step-by-step cooling system, the first fin condenser and the second fin condenser form a step-by-step heating system, the damp-heat gas from the drying chamber is discharged into the external environment air after being cooled step by the second fin evaporator and the first fin evaporator, the outside ambient air enters the drying chamber after being heated and heated step by the first fin condenser and the second fin condenser. The utility model discloses can effectively reduce high temperature drying's energy consumption and running cost.

Description

An air source high temperature heat pump dryer

technical field

The utility model relates to an air source high temperature heat pump dryer.

Background technique

The energy consumption of heat pump dehumidification and drying is much lower than fuel heating, electric heating and other dehumidification and drying methods. Therefore, heat pump dehumidification and drying are often used in low-temperature drying (such as the drying temperature required for materials is lower than 55°C). However, when the material requires a high drying temperature (such as a drying temperature of 60-90°C), ordinary heat pump drying cannot be realized; high-temperature heat pumps often cannot be realized due to the lack of high-temperature heat sources; carbon dioxide heat pumps can achieve high-temperature drying, but because of their high cost, At present, it is difficult to popularize and apply; therefore, in places that require high temperature dehumidification and drying, fuel heating, electric heating and other high energy consumption methods are generally used at present.

Utility model content

Aiming at the shortcomings of the prior art, the purpose of this utility model is to provide an air source high temperature heat pump dryer which reduces the energy consumption and operating cost of high temperature drying.

In order to achieve the above purpose, the technical solution of this utility model is: an air source high temperature heat pump dryer, which includes a low temperature heat pump system and a high temperature heat pump system, the low temperature heat pump system includes a low temperature heat pump compressor forming a circulation loop, a first A gas-liquid separator, a first finned evaporator, a first throttling device, and a first finned condenser, the high-temperature heat pump system includes a high-temperature heat pump compressor, a second gas-liquid separator, and a second finned sheet evaporator, second throttling device and second finned condenser,

The second fin evaporator and the first fin evaporator constitute a step-by-step cooling system, the first fin condenser and the second fin condenser constitute a step-by-step heating system, and the hot and humid gas from the drying chamber passes through the second The finned evaporator and the first finned evaporator are cooled step by step and discharged into the external ambient air, and the external ambient air enters the drying chamber after being heated step by step by the first finned condenser and the second finned condenser .

The low-temperature heat pump system also includes a first filter connected between the first throttling device and the first fin condenser, and the high-temperature heat pump system also includes a filter connected between the second throttling device and the second fin condenser the second filter.

The low temperature heat pump system also includes a first liquid reservoir connected between the first filter and the first fin condenser, and the high temperature heat pump system also includes a liquid reservoir connected between the second filter and the second fin condenser Second reservoir.

In addition, the utility model also provides an air source high-temperature heat pump dryer, which includes a multi-stage temperature heat pump system, and each stage temperature heat pump system includes a heat pump, a gas-liquid separator, a finned evaporator, a section Flow device and finned condenser,

The fin evaporator forms a step-by-step cooling system according to the temperature level of the heat pump system, and the fin condenser forms a step-by-step heating and heating system according to the temperature level of the heat pump system. Finally, it is discharged from the drying room, and the ambient air enters the drying room after being heated step by step by the step-by-step heating system.

Each temperature heat pump system includes a filter and a liquid reservoir connected between the throttling device and the fin condenser.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

The air source high temperature heat pump is used to achieve high temperature drying, which avoids the thermal pollution caused by waste heat discharge and makes full use of waste heat. At the same time, due to the inherent high energy efficiency ratio of the heat pump, the energy consumption of high temperature drying can be greatly reduced. Fuel heating, electric heating and other high-temperature drying methods can reduce drying energy consumption by more than 60%.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the present utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

Example 1

As shown in Figure 1, an air source high-temperature heat pump dryer includes a low-temperature heat pump system and a high-temperature heat pump system. The low-temperature heat pump system includes a low-temperature heat pump compressor 11, a first gas-liquid separator 17, and a circulation loop. The first fin evaporator 16, the first throttling device 15, and the first fin condenser 12. The high-temperature heat pump system includes a high-temperature heat pump compressor 21, a second gas-liquid separator 27, and a second fin condenser constituting a circulation loop. Sheet evaporator 26, second throttling device 25 and second fin condenser 22,

The second fin evaporator 26 and the first fin evaporator 16 form a step-by-step dehumidification and cooling system, and the first fin condenser 12 and the second fin condenser 22 form a step-by-step heating and temperature-raising system. The hot and humid gas is dehumidified and cooled step by step by the second fin evaporator 26 and the first fin evaporator 16, and then discharged into the external ambient air, and the external ambient air passes through the first fin condenser 12 and the second fin condenser 22 After heating step by step, it enters the drying room.

The air source high temperature heat pump dryer includes a two-stage dehumidification and cooling system and a two-stage heating and heating system. The two-stage systems use different refrigerants to meet the corresponding working conditions. The low-temperature heat pump system can use common refrigerants, such as R22, R407C, etc., and the high-temperature heat pump system can use high-temperature refrigerants.

The low-temperature heat pump system also includes a first filter 14 connected between the first throttling device 15 and the first fin condenser 12, and the high-temperature heat pump system also includes a first filter 14 connected between the second throttling device 25 and the second fin condenser 12. A second filter 24 between the condensers 22 .

The low-temperature heat pump system also includes a first liquid reservoir 13 connected between the first filter 14 and the first fin condenser 12, and the high-temperature heat pump system also includes a reservoir connected to the second filter 24 and the second fin condenser. The second reservoir 23 between the tanks 22.

The condensing temperature of the refrigerant in the low-temperature heat pump system is 20°C-65°C, and the condensing temperature of the refrigerant in the high-temperature heat pump system is 40°C-110°C.

The operation mode of the utility model air source high temperature heat pump dryer is as follows:

External ambient air, such as air at 25°C enters the equipment and is initially heated through the first finned condenser 12, such as heated to 55°C; the preheated air is then secondarily heated through the second finned condenser 22, such as Heating to 90°C; the high-temperature dry air after secondary heating enters the drying chamber to dry the material.

The temperature of the air after drying the material is lowered, for example, to 70°C, and discharged out of the drying chamber; the exhaust gas from the drying chamber first passes through the second fin evaporator 26 to cool down once, for example, to 40°C, and then passes through the first fin evaporator 26. The sheet evaporator 16 is cooled for the second time, for example, to 20° C., and the drying chamber is exhausted and discharged from the equipment after the second cooling.

Example 2

In this embodiment, on the basis of Embodiment 1, the low-temperature and high-temperature two-stage heat pump system is extended to multiple stages. Specifically, it is an air source high temperature heat pump dryer, which includes a multi-stage temperature heat pump system, and each stage temperature heat pump system includes a heat pump compressor, a gas-liquid separator, a finned evaporator, a throttling device and a circulation loop. finned condenser,

The fin evaporator forms a step-by-step cooling system according to the temperature level of the heat pump system, and the fin condenser forms a step-by-step heating and heating system according to the temperature level of the heat pump system. Finally, it is discharged from the drying room, and the ambient air enters the drying room after being heated step by step by the step-by-step heating system.

Each temperature heat pump system includes a filter and a liquid reservoir connected between the throttling device and the fin condenser.

Claims (5)

1, a kind of air source high-temperature heat pump dryer, it is characterized in that comprising hot pump in low temp system and high temperature heat pump system, this hot pump in low temp system comprises hot pump in low temp compressor, first gas-liquid separator, first evaporator fin, first throttle device and first fin condenser that constitutes a closed circuit, this high temperature heat pump system comprises high temperature heat pump compressor, second gas-liquid separator, second evaporator fin, second throttling arrangement and second fin condenser that constitutes a closed circuit

This second evaporator fin and first evaporator fin constitute cooling system step by step, this first fin condenser and second fin condenser constitute heat temperature raising system step by step, hot and humid gas from hothouse is discharged in the external environment air after the cooling step by step of second evaporator fin and first evaporator fin, enters drying chamber behind the heat temperature raising step by step of external environment air through first fin condenser and second fin condenser.

2, air source high-temperature heat pump dryer according to claim 1, it is characterized in that: this hot pump in low temp system also comprises first filter that is connected between the first throttle device and first fin condenser, and this high temperature heat pump system also comprises second filter that is connected between second throttling arrangement and second fin condenser.

3, air source high-temperature heat pump dryer according to claim 2, it is characterized in that: this hot pump in low temp system also comprises first reservoir that is connected between first filter and first fin condenser, and this high temperature heat pump system also comprises second reservoir that is connected between second filter and second fin condenser.

4, a kind of air source high-temperature heat pump dryer is characterized in that comprising multistage temperature heat pump, and each grade temperature heat pump comprises heat pump compressor, gas-liquid separator, evaporator fin, throttling arrangement and the fin condenser that constitutes closed circuit,

This evaporator fin constitutes cooling system step by step according to the temperature rank of heat pump, this fin condenser constitutes heat temperature raising system step by step according to the temperature rank of heat pump, after the cooling step by step of cooling system step by step, discharge drying chamber from the hot and humid gas of hothouse, enter hothouse behind the heat temperature raising step by step of external environment air through heat temperature raising system step by step.

5, air source high-temperature heat pump dryer according to claim 4 is characterized in that: each grade temperature heat pump comprises filter and the reservoir that is connected between throttling arrangement and the fin condenser.

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