CN201364001Y - Multiple source heat pump type dryer - Google Patents

Abstract

The utility model discloses a multiple source heat pump formula desiccator, it includes compressor, cross valve, evaporimeter, water ring heat exchanger, air dry heat equipment, vapour and liquid separator. Under the condition of air source heat exchange, the four-way valve is respectively connected with the compressor, the evaporator, the air dry-heat device and the gas-liquid separator; an electric auxiliary defrosting device is connected on a pipeline between the evaporator and the air dry heating device, and a gas-liquid separator, a drying filter, a one-way valve, a capillary tube, a sight glass and a liquid storage tank are sequentially connected in series on the evaporator along the pipeline of the air dry heating device; the one-way valve and the capillary are connected in parallel with the two-way expansion valve and then connected in series to the pipeline. Under the condition of heat exchange between a water source and a ground source, the compressor is respectively connected with the air dry heat device, the gas-liquid separator, the liquid storage tank and the water ring heat exchanger; a gas-liquid separator, a drying filter, a one-way valve, a capillary tube, a sight glass and a liquid storage tank are sequentially connected in series on the pipeline of the air dry heat device of the water ring heat exchanger; the one-way valve and the capillary are connected in parallel with the two-way expansion valve and then connected in series with the pipeline. Under the condition of this kind of compound heat source, the utility model discloses a compound source heat pump formula desiccator has that the range of application is wide, heat exchange efficiency is high, dry material is effectual under the prerequisite of using dedicated air dry heat device, can guarantee equipment steady operation simultaneously to can realize zero pollutant discharge and energy-conserving purpose of increasing efficiency.

Description

A composite source heat pump dryer

technical field

The utility model relates to a composite source heat pump type dryer, in particular to a dryer with wide application range, high heat exchange efficiency and good effect of drying materials.

Background technique

At present, air-conditioning heat pump technology is used for drying materials, etc., and the limit temperature that can stably produce hot and dry air cannot exceed 60 degrees. Even if it can be done in the laboratory, it is unstable; because it greatly shortens the heating The service life of the key component compressor is at the cost, and it is very unstable. It cannot meet the requirements of high-temperature drying for most materials, and it is difficult to promote its use. At present, only a few in this field use a single-stage heat pump and a single heat exchanger for heating to produce hot and dry air, which not only has low heat exchange efficiency, but also cannot produce high-temperature hot air above 60 degrees for drying materials. , and the operation is very unstable. This is because the intake air temperature of the compressor cannot exceed the limit of 45 degrees. If this temperature is exceeded, the compressor will stop and automatically protect. If the protection fails, the compressor will be burned out. This has just restricted the function of making high-temperature hot air with it.

Utility model content

Aiming at the problem that the heat pump in the prior art cannot stably produce hot air higher than 60 degrees and the thermal efficiency is low, the utility model provides a composite source heat pump dryer, which uses different heat source conditions such as air source, water source and ground source. Combined with the use of a special air dry heat device, the dry heat device implements internal staged heating to achieve variable air volume, thereby improving heat exchange efficiency and stably producing high-temperature hot air above 60 degrees, which not only ensures that the compressor can operate normally. Reliable operation under certain conditions, meet the requirements of drying materials, and improve the drying effect and the service life of the drying equipment.

In order to realize the above-mentioned technical purpose, the utility model adopts the following technical solutions:

A composite source heat pump dryer, which includes a compressor, a four-way valve, an evaporator, a water ring heat exchanger, an air dry heat device, and a gas-liquid separator. It is characterized in that: under the condition of heat exchange of the air source, the four-way valve is respectively connected with the compressor, the evaporator, the air dry heat device, and the gas-liquid separator; An electric auxiliary defrosting device is connected to the pipeline between the evaporator and the air dry heating device, and a gas-liquid separator, a dry filter, a single One-way valve, capillary tube, sight glass and liquid storage tank; after the one-way valve and capillary tube are connected in parallel with the two-way expansion valve, they are connected in series to the pipeline. Under the conditions of heat exchange between the water source and the ground source, the compressor is respectively connected with the air dry heat device, the gas-liquid separator, and the water ring heat exchanger; A gas-liquid separator, a dry filter, a one-way valve, a capillary, a sight glass and a liquid storage tank are connected in series along the pipeline of the air dry heating device; after the one-way valve and the capillary are connected in parallel with the two-way expansion valve, on the pipeline. In addition, in order to ensure heat exchange efficiency and heat exchange stability, each air dry heat device has two symmetrical compressors with the same capacity to supply heat at the same time, thus greatly improving the reliability and stability of the whole equipment operation.

Preferably, the air dry heat device of the composite source heat pump dryer is equipped with a special fan for the air outlet, a working fluid inlet and a temperature sensor on the front of the first row of single condensers.

Preferably, the air inlet air valve and the working fluid outlet are installed on the front of the end of the last row of monomer condensers in the air dry heat device of the composite source heat pump dryer, and the air return outlet is installed on the side.

Preferably, a certain space and distance must be kept between every two adjacent rows of monomer condensers of the air dry heat device of the composite source heat pump dryer.

Preferably, the electric auxiliary heating device of the air dry heat device of the composite source heat pump dryer is installed in the middle of the first and last rows of the single condenser.

Preferably, the working fluid inlet of the air dry heat device of the composite source heat pump dryer is installed in the first row of monomer condensers, and the working fluid outlet is installed in the last row of monomer condensers.

A composite source heat pump dryer of the present invention has the following beneficial effects:

The utility model provides a composite source heat pump dryer. Under the conditions of using different heat sources such as air source, water source and ground source, a special air dry heat device is used in combination. Several single condensers in the air dry heat device are composed of It is arranged in series from front to back in stages, which has the effect of staged heating. At the same time, the special fan at the air outlet at the front end and the air valve at the air inlet at the end have the function of adjusting the air volume, so that the heating required in the air dry heating device can be changed. The air flow rate and heat transfer rate are high, and then the heat transfer is strengthened in stages; at the same time, the inlet of the working fluid is at the front end, and the outlet of the working fluid is at the end, and the high-temperature working fluid and the cold air are spiraled in reverse in the pipeline; through this convection method The heat transfer temperature difference and the heat transfer gradient are greatly and effectively improved to perform sufficient heat transfer, thereby greatly improving the heat transfer efficiency. At the same time, since the working fluid entering the compressor is countercurrent to the incoming air, the working fluid comes out of the compressor at a high temperature and enters the heat exchange device for heat exchange. The temperature of the working fluid decreases step by step due to the convective heat exchange with the air, while the temperature of the air The temperature rises step by step due to the heat obtained by heat exchange; after the working medium is cooled step by step to the allowable temperature for the normal operation of the compressor, it enters the compressor at a low temperature to ensure that the compressor operates under normal conditions, thereby fully ensuring Extend the service life of the compressor, realize the normal operation of the equipment, achieve the purpose of stably generating high-temperature hot air, and meet the requirements of users for drying materials.

In addition, in order to ensure heat exchange efficiency and heat exchange stability, each air dry heat device has two symmetrical compressors with the same capacity to supply heat at the same time, thus greatly improving the reliability and stability of the whole equipment operation.

The composite source heat pump dryer of the utility model has the advantages of wide application range, multiple heat sources, high heat exchange efficiency, and good effect of drying materials. At the same time, it can ensure the stable operation of the equipment, and can realize zero pollution discharge and energy saving and efficiency enhancement. the goal of.

Description of drawings

Fig. 1 is a schematic diagram of a connection circuit of a preferred embodiment of a combined source heat pump dryer of the present invention under the condition of an air source.

Fig. 2 is a schematic diagram of a connection circuit of a preferred embodiment of a composite source heat pump dryer of the present invention under conditions of water source and ground source.

Fig. 3 is a cross-sectional view of a preferred embodiment of the air drying and heating device of a composite source heat pump dryer of the present invention;

1-compressor, 2-four-way valve, 3-evaporator, 4-dry filter, 5-two-way expansion valve, 6-one-way valve, 7-capillary, 8-liquid storage tank, 9-air dry heat device , 10-gas-liquid separator, 11-water ring heat exchanger

12-sight glass, 13-electric auxiliary defrosting device, 14-working medium pressure switch

201-shell, 202-flat-plate condenser, 203-special fan for air outlet, 204-air valve for air inlet, 205-temperature sensor, 206-return air outlet, 207-electric auxiliary heating device, 208-shell insulation board , 209-working fluid inlet, 210-working fluid outlet, 211-built-in copper sleeve, 212-aluminum fin

Detailed ways

Now illustrate preferred embodiment of the present utility model in conjunction with accompanying drawing.

As shown in Figure 1, the composite source heat pump dryer of the present invention is connected by a compressor 1, a four-way valve 2, an evaporator 3, an air drying and heating device 9 and a gas-liquid separator 10 under the condition of air source heat exchange. composition. The four-way valve 2 is respectively connected with the compressor 1, the evaporator 3, the air dry heat device 9 and the gas-liquid separator 10; Device 3 has dry filter 4, one-way valve 6, capillary 7, sight glass 12, liquid storage tank 8 in series along the pipeline between air dry heat device 9; 5 After connecting in parallel, connect them to the pipeline in series. A working medium pressure switch 14 may also be provided between the compressor 1 and the four-way valve 2 , and a working medium pressure switch 14 may also be provided between the compressor 1 and the gas-liquid separator 10 .

In the heating mode, the compressor 1 sucks the low-temperature and low-pressure gas in the gas-liquid separator 10, and discharges the high-temperature and high-pressure gas after being pressurized by the compressor. The high-temperature and high-pressure gas in the device 9 is exothermicly cooled to a low-temperature and high-pressure liquid, so that the cold air outside the copper tube of the working medium is heated, and the high-temperature working medium and the cold air are convectively moving, because the air dry heat device 9 is heated by internal stages , at the same time, since the special fan 203 at the air outlet and the air valve 204 at the air inlet can both adjust the flow rate and flow rate of the air, thereby changing the flow rate of dry and hot air, and also changing the heat transfer temperature difference and heat transfer gradient, greatly improving the heat transfer efficiency efficiency. The low-temperature and high-pressure liquid comes out of the air dry heat device 9, flows into the liquid storage tank 8, and passes through the sight glass 12 to the two-way expansion valve 5. After being throttled by the two-way expansion valve 5, the high-pressure liquid is reduced to a low-temperature and low-pressure liquid, and then dried and filtered After removing moisture and impurities, the copper pipe entering the evaporator 3 absorbs the heat in the ambient air and vaporizes into a low-pressure gas, then passes through the four-way valve 2 to the gas-liquid separator 10, and is separated by the gas-liquid separator 10 , so that the working fluid returned to the compressor 1 is gas, thus completing a heating cycle.

As shown in Figure 2, the composite source heat pump dryer of the present invention is composed of a compressor 1, a water ring heat exchanger 11, an air drying and heating device 9 and a gas-liquid separator 10 connected under the conditions of water source and ground source heat exchange. . The compressor 1 is respectively connected to the gas-liquid separator 10, the water ring heat exchanger 11 and the air dry heat device 9; on the pipeline between the water ring heat exchanger 11 along the air dry heat device 9, there are dry filters 4 in series in series , one-way valve 6, capillary tube 7, sight glass 12, liquid storage tank 8; after one-way valve 6 and capillary tube 7 are connected in parallel with two-way expansion valve 5, they are connected to the pipeline in series. There may also be a working medium pressure switch 14 between the compressor 1 and the air dry heating device 9 , and there may also be a working medium pressure switch 14 between the compressor 1 and the gas-liquid separator 10 .

In the heating mode, the compressor 1 sucks the low-temperature and low-pressure gas in the gas-liquid separator 10, and discharges the high-temperature and high-pressure gas after being pressurized by the compressor. The gas is exothermicly cooled to a low-temperature and high-pressure liquid, so that the cold air outside the copper tube of the working medium is heated, and the high-temperature working medium and the cold air are convectively moving. Because the air dry heat device 9 is heated by internal stages, and at the same time, due to the Both the special fan 203 for the tuyere and the damper 204 for the air inlet can adjust the flow rate and flow rate of the air, thereby changing the flow rate of dry and hot air, changing the heat transfer temperature difference and heat transfer gradient, and greatly improving the heat transfer efficiency. The low-temperature and high-pressure liquid comes out of the air dry heat device 9, flows into the liquid storage tank 8, and passes through the sight glass 12 to the two-way expansion valve 5. After being throttled by the two-way expansion valve 5, the high-pressure liquid is reduced to a low-temperature and low-pressure liquid, and then dried and filtered Water and impurities are removed after entering the water ring heat exchanger 11, and the heat of water vapor is absorbed in the copper tube of the water ring heat exchanger 11 to be vaporized into a low-pressure gas, and then enter the gas-liquid separator 10, and after being separated by the gas-liquid separator 10, return to The working medium in the compressor 1 is gas, thus completing a heating cycle.

As shown in Figure 3, it is an example of the connection circuit diagram of a preferred embodiment of the air drying and heating device of the composite source heat pump dryer of the present invention. The air drying and heating device includes a housing 201 and four single flat-plate condensers 202 , special fan 203 for air outlet, air valve 204 for air inlet, temperature probe 205, return air outlet 206, electric auxiliary heating device 207, shell insulation board 208, working fluid inlet 209, and working fluid outlet 210. The single condenser 202 consists of a built-in copper sleeve 211 and heat-dissipating aluminum fins 212. The four single condensers 202 have the same size and shape, and are arranged step by step in the order of 1, 2, 3, and 4 from front to back. Connected end to end. The heat exchange working medium enters from the front-end working medium inlet 209 and comes out from the terminal working medium outlet 210. It flows in a spiral manner in the built-in copper sleeve 211. The low-temperature air enters from the air inlet valve 204 of the last row of condensers at the end. After the convective heat exchange of the high-temperature working medium gas in the copper casing 211, the high-temperature air is blown out from the special fan 203 at the air outlet of the first row of condensers at the front end; The flow rate and flow rate, so the air capacity in the four single condensers 202 is constantly changing. This convection method can greatly effectively increase the heat transfer temperature difference and heat transfer gradient, and strengthen the heat transfer.

Preferably, as shown in FIG. 3 , the first row of unit heat exchangers in the unit heat exchangers 202 can also be equipped with a temperature-sensing probe 205 , which can be used to control the temperature and air volume of the blown air. Of course, the air return port 206 can also be equipped at the end.

Preferably, as shown in FIG. 3 , the electric auxiliary heating device 207 is installed in the middle of the first and last rows of the single condenser.

Preferably, as shown in FIG. 3 , a space distance of 30 cm must be maintained between each two adjacent rows of monomer condensers.

Preferably, as shown in the figure, the working fluid inlet 209 is installed in the first row of monomer condensers, and the working fluid outlet 210 is installed in the last row of monomer condensers.

What is disclosed above is only the preferred embodiment of the composite source heat pump dryer of the present utility model, and of course it cannot limit the scope of rights of the present utility model. Therefore, the equivalent changes made according to the patent scope of the utility model still belong to The scope covered by the utility model.

Claims (9)

1. A composite source heat pump dryer, which includes a compressor, a four-way valve, an evaporator, a water ring heat exchanger, an air dry heat device, and a gas-liquid separator. It is characterized in that: under the condition of heat exchange of the air source, the four-way valve is respectively connected with the compressor, the evaporator, the air dry heat device, and the gas-liquid separator; An electric auxiliary defrosting device is connected to the pipeline between the evaporator and the air dry heating device, and a gas-liquid separator, a dry filter, a single One-way valve, capillary tube, sight glass and liquid storage tank; after the one-way valve and capillary tube are connected in parallel with the two-way expansion valve, they are connected in series to the pipeline. Under the conditions of heat exchange between the water source and the ground source, the compressor is respectively connected with the air dry heat device, the gas-liquid separator, and the water ring heat exchanger; A gas-liquid separator, a dry filter, a one-way valve, a capillary, a sight glass and a liquid storage tank are connected in series along the pipeline of the air dry heating device; after the one-way valve and the capillary are connected in parallel with the two-way expansion valve, on the pipeline. 2. A composite source heat pump dryer as claimed in claim 1, characterized in that, under the condition of heat exchange of the air source, the four-way valve is respectively connected with the compressor, the evaporator, The air dry heating device and the gas-liquid separator are connected; an electric auxiliary defrosting device is connected on the pipeline between the evaporator and the air dry heating device, and the evaporator is connected along the air dry heating device. A gas-liquid separator, a dry filter, a one-way valve, a capillary, a sight glass and a liquid storage tank are connected in series on the pipeline of the thermal device; the one-way valve and the capillary are connected in parallel with the two-way expansion valve, and then connected in series to the pipeline. 3. A composite source heat pump dryer as claimed in claim 1, characterized in that, under the condition of heat exchange between the water source and the ground source, the compressor is respectively connected with the air dry heat device, the The gas-liquid separator and the water ring heat exchanger are connected; on the water ring heat exchanger along the pipeline of the air dry heat device, there are gas-liquid separator, dry filter, one-way valve, capillary tube, The sight glass and the liquid storage tank; the one-way valve and the capillary are connected in parallel with the two-way expansion valve, and then on the pipeline in series. 4. A composite source heat pump dryer according to claim 1, characterized in that the air drying and heating device includes a shell, several single flat condensers, a special fan for the air outlet, and an air inlet. Air outlet air valve, return air outlet, working fluid inlet, working fluid outlet, electric auxiliary heating device, shell insulation board and temperature sensing probe. The monolithic flat-plate condenser consists of a shell, a built-in copper sleeve, heat-dissipating aluminum fins, a working fluid connection inlet, and a working fluid connection outlet; it is characterized in that: The several individual flat-plate condensers have the same size and shape, and are arranged in series from front to back in the order of n, n+1, n+2,...,n+m , and there is a certain distance between every two adjacent rows; among them, n and m are natural numbers. 5. A composite source heat pump dryer as claimed in claim 1, characterized in that, the front end of the first row of single condensers in the air dry heat device is equipped with a special fan for the air outlet and a working fluid Inlet and temperature probe. 6. A composite source heat pump dryer as claimed in claim 1, characterized in that the air inlet damper and working fluid are installed on the front of the end of the last row of single condensers of the air dry heat device The outlet is equipped with a return air outlet on its side. 7. A composite source heat pump dryer according to claim 1, characterized in that a certain space and distance must be kept between every two adjacent rows of individual condensers in the air dry heat device. 8. A compound source heat pump dryer according to claim 1, characterized in that the electric auxiliary heating device of the air dry heat device is installed in the middle of the first and last rows of the single condenser. 9. A composite source heat pump dryer as claimed in claim 1, characterized in that the working medium inlet of the air dry heat device is installed in the first row of monomer condensers, and the working medium outlet is installed in the last row of unit condensers. in the body condenser.

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