CN209857546U

CN209857546U - Energy-conserving drying equipment dehumidifies

Info

Publication number: CN209857546U
Application number: CN201920609625.6U
Authority: CN
Inventors: 沈文荣
Original assignee: SUZHOU DASHAN PURIFICATION TECHNOLOGY Co Ltd
Current assignee: SUZHOU DASHAN PURIFICATION TECHNOLOGY Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2019-12-27
Anticipated expiration: 2029-04-29

Abstract

The utility model discloses a dehumidification energy-saving drying device, which comprises a compressor, a refrigerant pipeline connected with the compressor, a refrigerant running in the refrigerant pipeline, a drying chamber for placing articles to be dried, a heating device for heating gas to form heating gas, an air supply device for conveying the heating gas to the drying chamber, a cold quantity release device for releasing the cold quantity of the refrigerant, a heat recovery device for cooling the heating gas discharged from the drying chamber and a cooling device for condensing and dehumidifying the gas, a four-way valve is arranged on the refrigerant pipeline, a first expansion valve is arranged between the four-way valve and the cold energy releasing device, and a second expansion valve is arranged between the four-way valve and the cooling device, and the heat recovery device comprises a first heat exchange channel and a second heat exchange channel. The utility model discloses a dehumidification drying equipment all carries out full utilization to cold volume and heat, and is energy-conserving more showing.

Description

Energy-conserving drying equipment dehumidifies

Technical Field

The utility model belongs to the technical field of drying equipment, concretely relates to energy-conserving drying equipment of dehumidification and drying method based on this energy-conserving drying equipment of dehumidification.

Background

The existing drying equipment on the market generally directly adopts the mode of electrical heating to heat and dry, or adopts heat pump set, utilizes compressor compression refrigerant to produce the heat, dries through the heat that gives out behind the condenser heat exchange, and the temperature with the drying area risees, reaches the purpose of drying the article in the drying area. However, after the air in the drying area is heated, the water content of the air is greatly increased, although the humid air in the drying area can be exhausted by a sensor or a timing setting mode, and then the outside air is sucked in for dry and humid air exchange. However, the drying method not only consumes a long time and consumes a large amount of energy, but also the dried articles still contain certain moisture, so that when the articles are taken out from the drying area after being dried and placed in a normal temperature environment, the articles can be rewetted after the temperature is reduced.

Disclosure of Invention

In view of this, in order to overcome the defects in the prior art, one of the objectives of the present invention is to provide an energy-saving drying apparatus with high energy efficiency, more energy saving and low humidity.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a dehumidification energy-saving drying device comprises a compressor, a refrigerant pipeline connected with the compressor, a refrigerant running in the refrigerant pipeline, a drying chamber for placing articles to be dried, a heating device for heating gas to form heated gas, an air supply device for conveying the heated gas to the drying chamber, a cold energy release device for releasing cold energy of the refrigerant, a heat recovery device for cooling the heated gas discharged from the drying chamber, and a cooling device for condensing and dehumidifying the gas, wherein a four-way valve is arranged on the refrigerant pipeline, a first expansion valve is arranged between the four-way valve and the cold energy release device, a second expansion valve is arranged between the four-way valve and the cooling device, the heat recovery device comprises a first heat exchange channel and a second heat exchange channel, the drying chamber is internally provided with a drying area.

Preferably, the dehumidifying and energy-saving drying apparatus comprises a heat releasing device for releasing heat, the heat releasing device comprising a first exhaust fan and a first condensing heater; the cold quantity releasing device comprises a second exhaust fan and a first evaporator; the heat recovery device comprises a heat recoverer, and the cooling device comprises a second evaporator.

Preferably, the drying zone has a heated gas inlet and a heated gas outlet; the first heat exchange channel is provided with a heat recovery device gas inlet enabling the heated gas discharged from the heated gas outlet to enter the heat recovery device for heat exchange and a heat recovery device gas outlet enabling the gas after heat exchange to be discharged from the heat recovery device, and the second heat exchange channel is provided with a heat recovery inlet enabling the cooled gas cooled by the cooling device to be sent into the heat recovery device for heat exchange and a heat recovery outlet enabling the cooled gas after heat exchange to be discharged.

More preferably, the heat recovery device comprises a heat exchange pipe and a shell, a first heat exchange channel is formed in the heat exchange pipe, and a second heat exchange channel is formed between the heat exchange pipe and the shell.

Further preferably, the dehumidification energy-saving drying equipment comprises a first return air duct communicating the drying chamber and the heat recovery device, a second return air duct for conveying the cooling air output from the cooling device to the heat recovery device, and a third return air duct for conveying the air output from the heat recovery outlet or the air output from the first return air duct to the air supply device, wherein a third condensation heater is arranged at one end of the third return air duct close to the air supply device.

Still preferably, the heating device is a second condensing heater; the refrigerant pipeline is sequentially communicated with the compressor, the first condensing heater, the second condensing heater, the third condensing heater and the four-way valve and then returns to the compressor, and four interfaces in the four-way valve are respectively communicated with the third condensing heater, the first evaporator, the second evaporator and the compressor; a refrigerant pipe is arranged between the second evaporator and the compressor.

In some embodiments, a gas filtering device is further disposed between the air supply device and the drying zone. The energy-conserving drying equipment of dehumidification still includes outer box and interior box, sets up the heat preservation on the box, is located the controller on the outer box, is located the truckle of outer box below. The drying area is internally provided with a bracket for placing articles to be dried and a sterilizing device positioned at the top of the drying area.

The utility model also provides an energy-conserving drying equipment of other dehumidification, energy-conserving drying equipment of dehumidification include the compressor, with refrigerant pipeline, the operation that the compressor links to each other are in refrigerant among the refrigerant pipeline, be used for placing the drying chamber of treating the stoving article, heat with the electric heater unit who forms the heating gas to gas, to the drying chamber is carried heating gas's air supply arrangement, be used for the release the cold volume release of refrigerant cold volume, to following the heat reclamation device that the heating gas of drying chamber exhaust cooled down and the cooling device who carries out condensation dehumidification to gas, electric heater unit sets up air supply arrangement with between the drying chamber, heat reclamation device includes first heat transfer passageway and second heat transfer passageway, the drying chamber has the drying area in. When the condenser is used on small equipment, the first condensing heater, the first exhaust fan, the first evaporator, the second exhaust fan and the third condensing heater can be eliminated because the space is small, the power consumption is small, and the energy-saving effect is not obvious. When the equipment is used, the temperature in the drying area is raised by directly adopting an electric heating device for heating; after the temperature reaches a set value, the compressor is started, and the moisture in the gas is removed by adopting dehumidification and heat recovery modes, so that the same effect is achieved.

The utility model also provides a drying method according to above-mentioned energy-conserving drying equipment of dehumidification, drying method utilizes the heating gas to dry article, drying method specifically includes following step:

(1) placing the articles to be dried in a preset drying area, wherein the drying area is provided with a heating gas inlet and a heating gas outlet;

(2) introducing the heated gas into the drying zone from the heated gas inlet, heating the articles in the drying zone, and then discharging the heated gas out of the drying zone from the heated gas outlet, wherein the heated gas discharged from the drying zone is divided into two streams;

(3) dehumidifying and heating one of the two streams of heating gas, and then introducing the dehumidified and heated one stream of heating gas into the drying area again;

(4) and heating the other of the two strands of heating gas and then introducing the heated gas into the drying area again.

Preferably, in the step (3), the heating gas to be dehumidified is cooled to achieve dehumidification. And (3) arranging a heat recovery device and a cooling device, wherein the heat recovery device comprises a first heat exchange channel and a second heat exchange channel, the gas which is discharged from the drying area and needs to be dehumidified is subjected to heat recovery and cooling through the first heat exchange channel and the cooling device of the heat recovery device in sequence, then the cooling gas discharged from the cooling device is introduced into the second heat exchange channel, the gas in the first heat exchange channel is discharged after being subjected to heat exchange with the gas in the second heat exchange channel, and the gas discharged from the second heat exchange channel is introduced into the drying area after being further heated.

Preferably, the gas to be dehumidified comprises 20% to 98%, preferably 30% to 50%, more preferably 30% of the total volume of gas output from the drying zone.

Preferably, when the dehumidification energy-saving drying equipment is started, the refrigerant enters the first evaporator through the refrigerant pipeline and then directly returns to the compressor; when the dehumidification energy-saving drying equipment runs, the refrigerant directly returns to the compressor after entering the second evaporator through the refrigerant pipeline; an air supply device is adopted to heat gas through a first condensation heater or an electric heating device and then convey the heated gas to the drying area, the heated gas dries the articles to be dried, then the gas enters a first air return pipeline, a strand of gas needing dehumidification enters a heat recovery device to be cooled and enters a cooling device to be condensed, the condensed cooling gas enters the heat recovery device again through a second air return pipeline and carries out heat exchange with the gas entering the heat recovery device from the first air return pipeline, and the cooling gas after heat exchange enters the drying area after passing through a third air return pipeline and being heated; and the other gas in the first return air pipeline directly enters the drying area after being heated.

In practical application, the working process of the dehumidifying and energy-saving drying equipment is as follows:

when the dehumidifying energy-saving drying equipment is just started, the temperature of a drying area is increased to a set temperature by operating in a heat pump mode, and after the equipment normally operates, the dehumidifying energy-saving drying equipment operates in a dehumidifying mode to continuously discharge moisture, so that the aim of drying articles is finally fulfilled.

Specifically, the method comprises the following steps:

firstly, when the equipment is started, the equipment is operated in a heat pump mode to quickly raise the temperature in a drying area:

1. the heat pump mode operation, the temperature in the fast promotion drying area includes the following steps:

(1) the compressor operates to compress the refrigerant, the high-temperature high-pressure gaseous refrigerant is discharged from the exhaust port of the compressor, the high-temperature high-pressure gaseous refrigerant enters the first condensation heater through the copper pipe, the first exhaust fan is arranged on the first condensation heater, and when the temperature in the drying area exceeds the set temperature, the first exhaust fan works to exhaust partial heat to the outside of the dehumidifying energy-saving drying equipment.

(2) The refrigerant enters the second condensation heater from the outlet of the first condensation heater through the copper pipe, the high-temperature and high-pressure gaseous refrigerant exchanges heat with the gas flowing through the second condensation heater in the second condensation heater to heat the gas, and meanwhile, the temperature of the refrigerant is reduced.

(3) The refrigerant enters the third condensing heater from the outlet of the second condensing heater through the copper pipe, and the gas flowing through the third condensing heater takes away the residual heat of the refrigerant.

(4) The refrigerant enters the four-way valve from the outlet of the third condensing heater through the copper pipe, the four-way valve is electrified and started, the refrigerant is throttled by the first expansion valve, and the normal-temperature high-pressure gaseous refrigerant is throttled into the liquid refrigerant.

(5) The liquid refrigerant flows out of the outlet of the first expansion valve and enters the first evaporator. Since the first evaporator has a large internal space, the liquid refrigerant is volatilized from the liquid state to the gaseous state, and a large amount of heat is absorbed. And the second exhaust fan positioned on the first evaporator works to exhaust the cold energy on the first evaporator to the outside.

(6) The refrigerant volatilized into gas from liquid state flows back to the air suction port of the compressor through the outlet of the first evaporator, and thus a cycle is completed.

(7) And (5) repeating the steps (1) to (6), and repeatedly increasing the temperature in the drying area to the set temperature.

2. The air volume circulation is used for maintaining the temperature in the drying area, and the method comprises the following steps:

(1) the air supply device operates, the air and the second condensing heater exchange heat, the temperature of the heat of the high-temperature high-pressure refrigerant flowing through the inside of the second condensing heater is reduced, the temperature of the air flowing through the second condensing heater is increased, the air with reduced relative humidity is filtered by the air filtering device and enters the drying area after passing through the air outlet hole plate, and the air is mixed with air in the original drying area to heat the air in the drying area.

(2) The heated gas enters a heat recovery gas inlet of the heat recovery device through the air return pore plate, is discharged from a gas outlet of the heat recovery device after passing through the heat recovery device, enters the second evaporator, is discharged from the second evaporator, enters the heat recovery inlet, passes through a heat recovery outlet, flows through the third condensation heater, exchanges heat with a refrigerant in the third condensation heater, takes away the waste heat of the refrigerant, and further raises the gas temperature.

(3) And the gas with the increased temperature enters the air supply device, is pressurized by the air supply device and then enters the second condensation heater to exchange heat with the high-temperature and high-pressure refrigerant in the second condensation heater, and the heated gas is filtered by the gas filtering device and then is sent to the drying area.

(4) And (4) repeating the steps (1) to (3) and repeating the steps repeatedly, and maintaining the temperature in the drying area 8 at the set temperature.

Secondly, when the equipment runs, the equipment runs in a dehumidification mode to continuously discharge the moisture out of the equipment

1. The plant being operated in a dehumidifying mode

(1) The compressor operates, compresses the refrigerant, forms high-temperature high-pressure gaseous refrigerant and discharges from the compressor gas vent, and high-temperature high-pressure gaseous refrigerant passes through the copper pipe and gets into first condensation heater, sets up first exhaust fan on the first condensation heater, and when the temperature in the drying area exceeded the settlement temperature, first exhaust fan work was arranged partial heat to energy-conserving drying equipment's of dehumidification external world.

(3) The refrigerant enters the third condensing heater from the outlet of the second condensing heater through the copper pipe, and the residual heat of the refrigerant in the third condensing heater is taken away by the flowing gas.

(4) The refrigerant enters the four-way valve from the outlet of the third condensing heater through the copper pipe, the four-way valve is powered off, the refrigerant is throttled by the second expansion valve, and the normal-temperature high-pressure gaseous refrigerant is throttled into the liquid refrigerant.

(5) The liquid refrigerant flows out of the outlet of the second expansion valve and enters the second evaporator. Since the second evaporator has a large internal space, the liquid refrigerant is volatilized from the liquid state to the gas state, and a large amount of heat is absorbed. Exchanges heat with the gas flowing over the second evaporator to cool the gas while the temperature of the refrigerant increases.

(6) The refrigerant volatilized into gas from the liquid state flows back to the air suction port of the compressor through the outlet of the second evaporator, and a cycle is completed.

(7) And (4) repeating the steps (1) to (6) and repeating the steps in cycles to reduce the humidity in the drying area 8.

2. Air quantity circulation for secondary dehumidification

(1) And the air supply device operates to send the gas F into the second condensation heater, the gas F exchanges heat with the high-temperature and high-pressure refrigerant in the second condensation heater to cool the refrigerant and heat the gas F at the same time, and the heated gas flows through the gas filtering device and enters the drying area through the air outlet pore plate to form relatively clean gas A with increased temperature and reduced relative humidity.

(2) And (2) sending the relatively clean gas A with increased temperature and reduced relative humidity generated in the step (1) into the drying area, increasing the wind pressure in the drying area, and mixing the gas A sent into the drying area with the original gas in the drying area to increase the temperature and reduce the relative humidity of the gas in the drying area.

(3) The articles to be dried in the drying area are in the gas with the temperature rising and the relative humidity low in the drying area, the moisture of the articles in the drying area is evaporated to the drying area, the articles are dehydrated, and the relative humidity of the gas in the drying area is increased.

(4) Enabling part of gas B1 in the gas B in the drying area in the step (2) to enter a gas inlet of a heat recovery device after passing through a return air pore plate, enabling the gas B1 to flow through the heat recovery device, and carrying out heat exchange with gas D entering from the heat recovery inlet in the heat recovery device, so that the gas B1 forms gas C with reduced temperature and increased relative humidity; and the gas D forms a gas E with increased temperature and reduced relative humidity, the gas E enters the third condensation heater and exchanges heat with the refrigerant of the waste heat in the third condensation heater, and the gas F with increased temperature and reduced relative humidity is formed in the gas E. And (3) directly sending the residual gas B0 in the gas B in the drying zone in the step (2) into the drying zone after passing through a third air return pipeline.

(5) And (4) pressurizing the gas F in the step (4) by using an air supply device, allowing the gas F to enter a second condensation heater, performing heat exchange with a high-temperature and high-pressure refrigerant in the second condensation heater, and filtering the gas F by using a gas filtering device to form relatively clean gas A with increased temperature and reduced relative humidity, and allowing the gas A to enter a drying area.

And (5) repeating the steps (1) to (5), and finishing the secondary dehumidification process in the drying area in a circulating way to quickly dehydrate the articles in the drying area so as to achieve the purpose of drying the articles.

Because of the implementation of above technical scheme, the utility model discloses an energy-conserving drying equipment of dehumidification has following advantage compared with prior art: the utility model discloses a dehumidification drying equipment, have the efficiency height, the energy utilization range is extensive, and the drying zone does not exchange gaseous characteristics with the external world, all utilize cold volume and heat that the compressor compression refrigerant produced to adopt the mode of heat recovery, to the method of cold volume and heat reutilization, relative to current drying technology, energy-conservation is more showing; and through a heat recovery mode, moisture in the air in the drying area is removed secondarily, and the circulating air in the drying area is heated secondarily, so that the relative humidity of the air in the drying area is obviously reduced, the dehydration phenomenon of the objects to be dried in the drying area is ensured to be generated in a low-humidity environment, and the objects in the drying area are dried.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic view of a dehumidifying, energy-saving and drying apparatus in a preferred embodiment 1 of the present invention;

fig. 2 is a schematic view of a flow direction of a refrigerant in the dehumidifying, energy-saving and drying apparatus according to the preferred embodiment 1 of the present invention;

fig. 3 is a schematic view of a gas flow direction in the dehumidifying, energy-saving drying apparatus according to the preferred embodiment 1 of the present invention;

in the drawings: an outer box body-1, a lighting device-2, a heat preservation layer-3, a controller-4, a sterilizing device-5, a dried article support-6, an inner box body-7, a drying area-8, an air outlet hole plate-9, an air filtering device-10, a second condensing heater-11, a first condensing heater-12, a first exhaust fan-13, a compressor-14, a caster-15, a second exhaust fan-16, a first evaporator-17, an air supply device-18, an air return hole plate-19, a heat recovery device-20, a second evaporator-21, a third condensing heater-22, a four-way valve-23, a first expansion valve-24, a second expansion valve-25, a water collecting device-26, a water outlet-27 and an electric heating device-28, a heat recovery device gas inlet-30, a heat recovery device gas outlet-31, a heat recovery inlet-32, a heat recovery outlet-33, a first return air duct-34, a second return air duct-35, and a third return air duct-36.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first" and "second" herein are used for convenience of distinguishing a plurality of objects, and are not limited. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.

Embodiment 1 energy-conserving drying equipment dehumidifies

As shown in fig. 1-3, the energy-saving dehumidifying and drying apparatus in this embodiment comprises an outer box 1, an inner box 7, an insulating layer 3 disposed on the outer box 1, a controller 4 disposed on the outer box 1, casters 15 disposed under the outer box 1, a compressor 14, a refrigerant pipeline, a refrigerant running in the refrigerant pipeline, the drying device comprises a drying chamber, a heating device for heating gas to form heated gas, an air supply device 18 for conveying the heated gas to the drying chamber, a cold quantity release device for releasing cold quantity of a refrigerant, a heat recovery device 20 for recovering heat quantity of the gas exhausted from the drying chamber, a cooling device for condensing the gas and a heat release device for releasing redundant heat quantity, wherein a drying area 8 is arranged in the drying chamber, the heat recovery device 20 comprises a heat recovery device, the cooling device comprises a second evaporator 21, and the heating device comprises a second condensation heater 11; a four-way valve 23 is arranged on the refrigerant pipeline, a first expansion valve 24 is arranged between the four-way valve 23 and the cold energy releasing device, and a second expansion valve 25 is arranged between the four-way valve 23 and the cooling device. The drying area 8 is internally provided with a bracket 6 for placing articles to be dried and a sterilizing device 5 positioned at the top of the drying area 8, and the dehumidifying and energy-saving drying equipment is also provided with a water collecting device 26 and a water outlet 27 for collecting water. And a gas filtering device 10 is also arranged between the air supply device and the drying area 8, and the gas filtering device 10 is arranged at an air outlet of the second condensing heater 11 so as to reduce the dust concentration in the drying area 8.

Specifically, the heat releasing means includes a first exhaust fan 13 and a first condensing heater 12; the cold quantity releasing device comprises a second exhaust fan 16 and a first evaporator 17; the heat recovery device 20 is a heat recovery device, and the cooling device is a second evaporator 21.

The drying zone 8 has a heated gas inlet, i.e. an outlet orifice 9 and a heated gas outlet. The heat recovery device 20 in this embodiment includes a heat exchange pipe and a casing, a first heat exchange channel is formed in the heat exchange pipe, and a second heat exchange channel is formed between the heat exchange pipe and the casing. The first heat exchange path has a heat recovery device gas inlet 30 through which the heated gas discharged from the heated gas outlet enters the heat recovery device 20 to perform heat exchange, and a heat recovery device gas outlet 31 through which the heat-exchanged gas is discharged from the heat recovery device 20, and the second heat exchange path has a heat recovery inlet 32 through which the cooled gas cooled by the cooling device is sent to the heat recovery device 20 to perform heat exchange, and a heat recovery outlet 33 through which the heat-exchanged cooled gas is discharged.

As shown in fig. 1 and 3, the energy-saving dehumidifying and drying apparatus includes a first return duct 34 communicating the drying zone 8 and the heat recovery device 20, a second return duct 35 for conveying the gas output from the cooling device to the heat recovery device 20, and a third return duct 36 for conveying the gas output from the heat recovery outlet 33 or the gas output from the first return duct 34 to the air blowing device, and the third return duct 36 is provided with a third condensing heater 22 at an end thereof close to the air blowing device.

As shown in fig. 2, the refrigerant pipeline is connected to the compressor 14, the first condensing heater 12, the second condensing heater 11, the third condensing heater 22, and the four-way valve 23 in sequence, and then returns to the compressor 14, one interface SA of the four-way valve is connected to the third condensing heater 22, the remaining two interfaces SE and SD are connected to the first evaporator 17, the remaining one interface SC is connected to the second evaporator 21, and a refrigerant pipeline, i.e. a copper pipe, is arranged between the second evaporator 21 and the compressor 14.

The heat recovery device 20 comprises a heat recovery inlet 32 and a heat recovery outlet 33, and the heat recovery device 20 comprises a heat recovery device gas inlet 30 and a heat recovery device gas outlet 31.

In other embodiments, such as when the apparatus is used in a small-sized apparatus, the energy saving effect is not obvious due to the small space and the small electric power, the first condensing heater 12, the first exhaust fan 13, the first evaporator 17, the second exhaust fan 16 and the third condensing heater 22 can be eliminated, the electric heating device 28 is arranged between the air supply device and the drying area 8, and when the apparatus is used, the temperature of the drying area 8 is raised by directly adopting the electric heating device 28; after the temperature reaches the set value, the compressor 14 is started, and the moisture in the gas is removed by adopting a damp-heat removal recovery mode, so that the same effect is achieved.

Example 2 drying method

As shown in fig. 1 to 3, this embodiment provides a drying method of the dehumidification energy-saving drying apparatus in embodiment 1, where the drying method dries an article with heated air, and the drying method specifically includes the following steps:

(1) the articles to be dried are placed in a preset drying zone 8, and the drying zone 8 is provided with a heated gas inlet and a heated gas outlet.

(2) The heated gas is introduced into the drying zone 8 from the heated gas inlet, and after the articles in the drying zone 8 are heated, the heated gas is discharged from the drying zone 8 from the heated gas outlet, wherein the heated gas discharged from the drying zone 8 is divided into two streams.

(3) One of the two streams of heated gas is dehumidified and heated, and then is introduced into the drying area again. The gas to be dehumidified represents 20% to 98%, preferably 30% to 50%, more preferably 30% of the total volume of gas output from the drying zone.

In this step, dehumidification is achieved by cooling the heated gas that needs to be dehumidified.

Specifically, set up heat recovery unit 20 and cooling device, heat recovery unit 20 includes first heat transfer passageway and second heat transfer passageway, this strand of gas that makes in proper order to carry out the dehumidification from drying zone 8 exhaust needs carries out heat recovery and cooling through heat recovery unit 20's first heat transfer passageway and cooling device, then let in the second heat transfer passageway with the cooling gas that comes out from cooling device, the gas in the first heat transfer passageway is discharged after taking place the heat exchange with the gas of second heat transfer pipeline, the gas of following second heat transfer passageway combustion gas is after further heating, let in drying zone 8.

(4) And heating the other of the two streams of heating gas and then introducing the heated gas into the drying area again.

When the dehumidifying, energy-saving and drying equipment is started, the refrigerant directly returns to the compressor after entering the first evaporator 17 through the refrigerant pipeline; when the dehumidifying, energy-saving and drying device is operated, the refrigerant directly returns to the compressor 14 after entering the second evaporator through the refrigerant pipeline 21; the air supply device 18 is used for heating the air by the first condensation heater 11 and then conveying the air to the drying area 8, the heated air dries the articles, then the air enters the first air return pipeline 34, part of the air in the first air return pipeline 34 enters the heat recovery device 20 for cooling and enters the cooling device for condensation, the condensed cooling air enters the heat recovery device 20 again through the second air return pipeline 35 and exchanges heat with the air entering the heat recovery device 20 from the first air return pipeline 34, and the cooled air after heat exchange enters the drying area 8 through the third air return pipeline 36 after being heated; the remaining portion of the gas in the first return air duct 34 is directly heated before entering the drying zone.

Example 3 plant operation procedure

when the dehumidifying energy-saving drying equipment is just started, the dehumidifying energy-saving drying equipment firstly operates in a heat pump mode to raise the temperature of the drying area 8 to a set temperature, and operates in a dehumidifying mode after the equipment normally operates to continuously discharge moisture, so that the aim of drying articles is finally achieved.

Specifically, the method comprises the following steps:

(1) the compressor 14 operates to compress the refrigerant, the high-temperature high-pressure gaseous refrigerant is discharged from an exhaust port of the compressor 14, the high-temperature high-pressure gaseous refrigerant enters the first condensation heater 12 through a copper pipe, the first exhaust fan 13 is arranged on the first condensation heater 12, and when the temperature in the drying area 8 exceeds a set temperature, the first exhaust fan 13 works to exhaust partial heat to the outside of the dehumidifying energy-saving drying equipment.

(2) The refrigerant enters the second condensing heater 11 from the outlet of the first condensing heater 12 through the copper pipe, and the high-temperature and high-pressure gaseous refrigerant exchanges heat with the gas flowing through the second condensing heater 11 in the second condensing heater 11 to heat the gas, and meanwhile, the temperature of the refrigerant is reduced.

(3) The refrigerant enters the third condensing heater 22 from the outlet of the second condensing heater 11 through a copper pipe, and the gas flowing through the third condensing heater 22 carries away the residual heat of the refrigerant.

(4) The refrigerant enters the four-way valve 23 from the outlet of the third condensing heater 22 through a copper pipe, the four-way valve 23 is electrified and started, the refrigerant is throttled by the first expansion valve 24, and the normal-temperature high-pressure gaseous refrigerant is throttled into the liquid refrigerant.

(5) The liquid refrigerant flows out from the outlet of the first expansion valve 24 into the first evaporator 17. Since the first evaporator 17 has a large internal space, the liquid refrigerant is volatilized from the liquid state into a gaseous state, and a large amount of heat is absorbed. The second exhaust fan 16 located on the first evaporator 17 operates to exhaust the cooling capacity of the first evaporator 17 to the outside.

(6) The refrigerant volatilized from the liquid state into the gaseous state flows back to the suction port of the compressor 14 through the outlet of the first evaporator 17, completing one cycle.

(7) And (5) repeating the steps (1) to (6) and repeating the steps in cycles to increase the temperature in the drying area 8 to the set temperature.

(1) the air supply device 18 operates, air and the second condensing heater 11 exchange heat, the temperature of the heat of the high-temperature high-pressure refrigerant flowing through the inside of the second condensing heater 11 is reduced, the temperature of the air flowing through the second condensing heater 11 is increased, the air with reduced relative humidity is filtered by the air filtering device 10, enters the drying area 8 after passing through the air outlet hole plate 9, is mixed with air in the original drying area 8, and heats the air in the drying area 8.

(2) The heated gas enters a heat recovery gas inlet 30 of the heat recovery device 20 through a return air pore plate 19, passes through the heat recovery device 20, then comes out from a heat recovery device gas outlet 31, enters a second evaporator 21, and then enters a heat recovery inlet 32 from the second evaporator 21, passes through a heat recovery outlet 33, then flows through a third condensation heater 22, and exchanges heat with the refrigerant in the third condensation heater 22, so that the waste heat of the refrigerant is taken away, and the gas temperature is further raised.

(3) The gas with increased temperature enters the air supply device 18, is pressurized by the air supply device 18 and then enters the second condensation heater 11 to exchange heat with the high-temperature and high-pressure refrigerant in the second condensation heater 11, and the heated gas is filtered by the gas filtering device 10 and then is sent to the drying area 8.

1. The plant being operated in a dehumidifying mode

(1) The compressor 14 operates to compress the refrigerant, the high-temperature high-pressure gaseous refrigerant is discharged from an exhaust port of the compressor 14, the high-temperature high-pressure gaseous refrigerant enters the first condensation heater 12 through a copper pipe, the first exhaust fan 13 is arranged on the first condensation heater 12, and when the temperature in the drying area 8 exceeds a set temperature, the first exhaust fan 13 works to exhaust partial heat to the outside of the dehumidification energy-saving drying equipment.

(3) The refrigerant enters the third condensing heater 22 from the outlet of the second condensing heater 11 through a copper pipe, and the residual heat of the refrigerant in the third condensing heater 22 is taken away by the flowing gas.

(4) The refrigerant enters the four-way valve 23 from the outlet of the third condensing heater 22 through a copper pipe, the four-way valve 23 is powered off, the refrigerant is throttled by the second expansion valve 25, and the normal-temperature high-pressure gaseous refrigerant is throttled into the liquid refrigerant.

(5) The liquid refrigerant flows out from the outlet of the second expansion valve 25 and enters the second evaporator 21. Since the second evaporator 21 has a large internal space, the liquid refrigerant is volatilized from the liquid state into a gaseous state, and a large amount of heat is absorbed. Exchanges heat with the gas flowing over the second evaporator 21 to cool the gas while the temperature of the refrigerant is increased.

(6) The refrigerant evaporated from the liquid state to the gaseous state flows back to the suction port of the compressor 14 through the outlet of the second evaporator 21, completing one cycle.

2. Air quantity circulation for secondary dehumidification

(1) The air supply device 18 operates to send the gas F into the second condensing heater 11, the gas F exchanges heat with the high-temperature high-pressure refrigerant in the second condensing heater 11 to cool the refrigerant and heat the gas F at the same time, and the heated gas flows through the gas filter device 10 and enters the drying area 8 through the air outlet hole plate 9 to form a relatively clean gas a with increased temperature and reduced relative humidity.

(2) And (2) sending the relatively clean gas A with increased temperature and reduced relative humidity generated in the step (1) into the drying area 8, increasing the wind pressure in the drying area 8, and mixing the gas A sent into the drying area 8 with the original gas in the drying area 8 to increase the temperature and reduce the relative humidity of the gas in the drying area.

(3) The articles to be dried in the drying area 8 are in the gas atmosphere with the temperature of the drying area 8 being increased and the relative humidity being low, the moisture of the articles in the drying area is evaporated to the drying area 8, the articles are dehydrated, and the relative humidity of the gas in the drying area 8 is increased.

(4) Part of gas B1 in the gas B in the drying area 8 in the step (2) enters a gas inlet 30 of a heat recovery device after passing through a return air pore plate 19, the gas B flows through the heat recovery device 20 and exchanges heat with gas D entering from a heat recovery inlet 32 in the heat recovery device, and the gas B forms gas C with reduced temperature and increased relative humidity; the gas D forms a gas E with increased temperature and reduced relative humidity, the gas E enters the third condensing heater 22 and exchanges heat with the refrigerant of the residual heat in the third condensing heater 22, and the gas E is increased in temperature and reduced in relative humidity, and the gas F is formed. And (3) directly sending the residual gas B0 in the gas B in the drying zone in the step (2) into the drying zone after passing through a third air return pipeline 36.

(5) And (4) pressurizing the gas F in the step (4) by using an air supply device 18, allowing the gas F to enter a second condensation heater 11, performing heat exchange with a high-temperature high-pressure refrigerant in the second condensation heater 11, filtering the gas F by using a gas filtering device 10, and allowing the gas A with increased temperature, reduced relative humidity and relatively clean to enter a drying area 8.

And (5) repeating the steps (1) to (5), and finishing the secondary dehumidification process in the drying area in cycles to quickly dehydrate the articles in the drying area 8 so as to achieve the purpose of drying the articles.

Example 4 plant operation procedure

Specifically, the method comprises the following steps:

firstly, starting up equipment

When equipment starts, adopt the heat pump mode operation in order to promote the temperature in the drying zone fast, specifically include the following step:

(1) the power is switched on, the equipment is started, the compressor 14 operates to compress the refrigerant, and the high-temperature and high-pressure refrigerant is discharged from the exhaust port of the compressor 14 and enters the first condensation heater 12 through the copper pipe.

(2) The first condensing heater 12 is provided with a first exhaust fan 13, the starting of the first exhaust fan 13 is controlled by a temperature controller, and when the temperature of the drying zone 8 reaches a set requirement, the first exhaust fan 13 operates to radiate partial heat to the outside. The condensing heat quantity is the refrigerating capacity plus the compressor power, and the temperature requirement of the drying area 8 can be kept as long as the heat radiation quantity of the first condensing heater 12 is equal to the compressor power.

(3) And (2) enabling the high-temperature and high-pressure refrigerant in the step (1) to come out of the first condensation heater 12 and enter the second condensation heater 11 through the copper pipe, performing heat exchange with the gas F in the second condensation heater 11, enabling the temperature of the gas F to rise and the relative humidity to fall, filtering the gas F through the gas filtering device 10, and enabling the gas A to enter the drying area 8 after passing through the air outlet hole plate 9 to form relatively clean gas A with the temperature rise and the relative humidity to fall.

(4) And (3) mixing the gas A in the step (3) with the original gas in the drying area 8 to increase the temperature and reduce the relative humidity in the drying area 8, and diluting the dust concentration of the gas in the drying area 8 to form the gas B in a relatively clean state with increased gas temperature and reduced relative humidity in the drying area 8. Part of the gas B, namely B1 enters the heat recovery gas inlet 30 through the return air hole plate 19. And (3) directly sending the residual gas B0 in the gas B in the drying zone in the step (2) into the drying zone after passing through a third air return pipeline 36.

(5) And (4) allowing the refrigerant cooled by the first condensation heater 12 in the step (3) to enter a third condensation heater 22 through a copper pipe, performing heat exchange with gas E in the third condensation heater 22, and taking away the residual heat of the refrigerant by the gas E to form gas F with increased temperature and reduced relative humidity.

(6) And (4) enabling the refrigerant with the normal temperature and the high pressure in the step (5) to flow out from the outlet of the third condensation heater 22 through a copper pipe, and entering the inlet SA of the four-way valve 23.

The four-way valve 23 has SA, SC, SD and SE, and the inlet SA is communicated with the third condensing heater 22; SE is connected to the first expansion valve 24, and the other end of the first expansion valve 24 is connected to the first evaporator 17; SC is connected to the second expansion valve 25, and the other end of the second expansion valve 25 is connected to the second evaporator 25; SD is connected to the suction port of the compressor 14.

When the coil of the four-way valve 23 is energized: SA is communicated with SE, and SC is communicated with SD; when the coil of the four-way valve 23 is powered off: SA communicates with SC, SD communicates with SE.

When used for heating in the drying zone 8, the apparatus operates in the heat pump mode: a coil of the four-way valve 23 is electrified, a normal-temperature high-pressure refrigerant enters SE after passing through a port SA of the four-way valve 23, the refrigerant is throttled by the first expansion valve 24, and the refrigerant which is changed into liquid enters the first evaporator 17; meanwhile, the second exhaust fan 16 operates, the normal-temperature high-pressure liquid refrigerant is volatilized from the liquid state in the first evaporator 17 to form a gaseous state, a large amount of heat is absorbed, the second exhaust fan 16 operates to discharge the cold quantity to the outside, and the normal-temperature gaseous refrigerant flows back to the exhaust port of the compressor 14 through the copper pipe to enter the next cycle.

(8) In the step (4), the gas B1 enters the gas inlet 30 of the heat recovery device, exits from the heat recovery gas outlet 31, enters the heat recovery inlet 32 after passing through the second evaporator 21, exits from the heat recovery outlet 32, enters the third condensing heater 22, and exchanges heat with the refrigerant in the third condensing heater 22 to take away the residual heat of the refrigerant. The air from the third condensing heater 22 enters the air supply device 18, is pressurized by the air supply device 18, and is then sent to the second condensing heater 11. The gas is heat exchanged with the high-temperature and high-pressure refrigerant from the exhaust port of the compressor 14 in the second condensing heater 11, the temperature of the gas is raised again, and the gas with reduced relative humidity is filtered by the gas filtering device 10 and then is sent to the drying area 8 through the air outlet pore plate 9.

(9) And (3) repeating the steps (1) to (8) in cycles, and raising the temperature of the drying zone to the required temperature (50-60 ℃) and keeping the temperature. When the temperature in the drying area reaches the set temperature, the four-way valve is powered off, the second exhaust fan 16 stops running, and the equipment enters a running mode.

As shown in fig. 2, the refrigerant runs at start-up of the apparatus: a1 → A2 → A3 → A4 → A5 → A6 → A7 → SA → SE → A8 → A9 → A10 → A11 → A1, completing one cycle.

The above process is divided into steps (1) to (9) for convenience of understanding and description, and the steps (1) to (9) are performed simultaneously in the actual drying process.

Secondly, the equipment operates

When the equipment is operated, the temperature of the drying area is required to be maintained, and the moisture is also required to be continuously discharged out of the equipment, and the method specifically comprises the following steps:

(1) when the temperature in the drying area 8 reaches the set temperature, the four-way valve 23 is powered off, the second exhaust fan 16 stops running, and the equipment enters a running mode. The four-way valve SA is communicated with the SC, the normal-temperature and high-pressure refrigerant enters the second expansion valve 25 from the SC through a copper pipe, the refrigerant which is converted into a liquid state by throttling through the second expansion valve 25 enters the second evaporator 21, the liquid refrigerant is volatilized into a gaseous state from the liquid state in the second evaporator 21, a large amount of heat is absorbed, and the gas passing through the second evaporator 21 is cooled.

(2) The air supply device 18 operates to send the gas F into the second condensing heater 11, the gas F exchanges heat with the high-temperature high-pressure refrigerant in the second condensing heater 1 to cool the high-temperature refrigerant and heat the gas F at the same time, and the heated gas flows through the gas filtering device 10 and enters the drying area 8 through the air outlet hole plate 9 to form a relatively clean gas A with increased temperature and reduced relative humidity.

(3) Putting the articles into the drying area 8, wherein the temperature of the drying area 8 is raised to a set temperature, the relative humidity of the gas is low, the articles are in a low-humidity environment in the drying area 8, and the moisture in the articles is quickly evaporated to the drying area 8 to form gas B with raised temperature and increased relative humidity; the gas B enters the heat recovery device gas inlet 30 and the third return duct 36 under the operating pressure of the air supply device 18.

(4) B1, which is a part of the gas B in the drying zone 8 in the step (3), is sent to the heat recovery gas inlet 30, the gas B1 flows through the heat recovery device 20, enters the second evaporator 21 from the gas outlet 31 of the heat recovery device 20, exchanges heat with the refrigerant which is volatilized from the liquid state into the gas state in the second evaporator 21, the refrigerant is volatilized from the liquid state into the gas state, absorbs a large amount of heat, the passing gas is changed into the gas D with the temperature reduced and the relative humidity increased to the saturation state, and the gas D exits from the outlet of the second evaporator 21 and enters the heat recovery inlet 32. When the relative humidity of the gas D reaches a saturation state, water vapor in the gas D is condensed into water drops and is discharged through the water collecting device 26 and the water discharging port 27.

(5) Sending the gas B1 in the step (3) into the gas inlet 30 of the heat recovery device 20, performing heat exchange with the gas D which enters the heat recovery inlet 32 after coming out of the second evaporator 21 in the heat recovery device 20, reducing the temperature of the gas B1 to form a gas C with reduced temperature and increased relative humidity, wherein the relative humidity of the gas C reaches a saturated state, and water vapor in part of the gas C is condensed into water drops and is dripped into the water collecting device 26 of the storage container or directly discharged through the water outlet 27;

the gas C comes out from the gas outlet 31 of the heat recovery device 20, enters the second evaporator 21, exchanges heat with the refrigerant which is volatilized into a gas state from a liquid state, the temperature of the gas is further reduced, the relative humidity of the gas D is increased to a saturated state, and when the relative humidity of the gas D reaches the saturated state, the water vapor in the gas D1 is condensed into water drops and is discharged through the water collection device 26 and the water discharge port 27.

(6) Exchanging heat between the gas D in the step (5) and the gas B1 in the heat recovery device 20, transferring the cold energy of the gas D to the gas B1, and changing the gas B1 into a gas C with a further reduced temperature and an increased humidity; the heat of the gas B1 is transferred to the gas D, the gas D becomes a gas E with a further increased temperature and a reduced relative humidity, and the gas E flows out from the heat recovery outlet 33 of the heat regenerator 20.

(7) And (4) introducing the gas E with the increased temperature and the reduced relative humidity formed in the step (6) into a third condensation heater 22, carrying out heat exchange on the gas E and the refrigerant with the waste heat in the third condensation heater 22, further reducing the temperature of the refrigerant, and simultaneously changing the gas E into a gas F with the continuously increased temperature and the further reduced humidity.

(8) And (3) enabling the temperature-increased gas F formed in the step (7) to enter an air supply device 18, pressurizing the gas F by the air supply device 18, performing heat exchange with a high-temperature and high-pressure refrigerant in a condensing heater 11, forming gas A with continuously increased gas temperature and increased relative humidity after heat exchange, filtering the gas A by a gas filtering device 10, and enabling the gas A to enter a drying area 8 after passing through an air outlet hole plate 9.

And (3) repeating the steps (1) to (8), finishing the secondary dehumidification and secondary heating processes in the drying area 8 in cycles, fully utilizing the cold quantity and heat quantity generated by the refrigerant compressed by the compressor 14, increasing the temperature and reducing the humidity in the drying area 8, enabling the articles in the drying area 8 to be in a low-humidity environment for a long time, rapidly dehydrating the articles to be dried, achieving the purpose of drying, and avoiding the phenomenon of 'moisture regain'.

Refrigerant trend during equipment operation: a1 → A2 → A3 → A4 → A5 → A6 → A7 → SA → SC → B1 → B2 → B3 → A11 → A1, completing one cycle.

The above process is divided into steps (1) to (8) for convenience of understanding and description, and the steps (1) to (8) are performed simultaneously in the actual drying process.

Example 5 results and discussion

After one down jacket which is dried thoroughly and has the weight of 0.5 kilogram is cleaned and dried, the weight of the down jacket is 1.5 kilograms, and the water content of the down jacket is 1 kilogram. The comparison of the electric heating drying, the heat pump drying and the dehumidifying drying method of the embodiment 2 is as follows:

under the condition of one atmosphere, the ambient temperature is 20 ℃, the relative humidity is 50% RH, and the drying area is 1 cubic meter, the temperature of the drying area is raised to 55 ℃, and the down jacket with the water content of 1 kilogram is dried. The required heat is as follows:

the specific heat of water is about 4200 joules/(kilogram degree centigrade), and when 1 kilogram of water is increased from 20 degrees centigrade to 55 degrees centigrade, the required heat is 4200 (55-20) ═ 147000 joules; one kilogram of water needs 2360 kilojoules 2360000 joules to convert to steam. Namely, the total heat required for drying the down jacket with the water content of 1 kilogram is as follows: 147000+2360000 ═ 2507000 joule.

1 cubic meter of gas rises by 1 ℃ and needs to absorb 1290 joule heat, the ambient temperature is 20 ℃, and 1290 x (55-20) ═ 45150 joule is needed when 1 cubic meter of gas rises to 55 ℃.

Firstly, drying by adopting an electric heating mode:

at one atmosphere, ambient temperature 20 degrees celsius, relative humidity 50% RH, water content of about 7.5g in 1 kg of gas, 1 cubic meter of gas weight 1.293 kg, 1 cubic meter of gas water content 1.293 x 7.5 ═ 9.7 g, temperature rise to 55 degrees celsius, gas water content of about 64 g/kg at 60% RH, and 1 cubic meter of gas water content 1.293 x 64 ═ 82.75 g. When the temperature of 1 cubic meter of gas is increased to 55 ℃, 82.75-9.7-73.05 g of water can be absorbed. Drying with 1 kg of water requires ventilation of the drying zone: 1000/73.05 times (14 times), and the required heat is 14 × 45150 times (632100 joules). The common heat requirement for electric heating and drying is as follows: 2507000+6321000 ═ 3139100 joule.

When the drying is carried out by adopting electric heating, 1000 x 3600-360000 joule heat is generated in each hour when the power is 1 kw.

Air exchange temperature rise time: 45150/3600000 × 14 ═ 0.18 hour,

the drying time required for 1 kg of water is as follows: 3139100/360000 h 0.87 h.

When adopting electric heating stoving, required theoretical time is: 0.87+0.18 ═ 1.05 h.

Secondly, when the heat pump mode is adopted for drying:

under the same power, the energy efficiency ratio of the heat pump is about 1: 2.2, the required time is as follows: 0.87/2.5-0.48 h; air exchange temperature rise time: 45150/3600000 × 14 ═ 0.18 hours; when the heat pump is adopted for drying, the required theoretical time is as follows: 0.18+ 0.18-0.36 hours.

Thirdly, drying by adopting the dehumidification method in the embodiment 2:

under the same power, the heating capacity of the compressor is equal to the refrigerating capacity of the compressor plus the power of the compressor. The refrigerating capacity of a 1KW compressor is about 2.2KW, the heating capacity is about 3.2KW, the circulating air volume is about 1000 cubes/hour, and the dehumidifying air volume is 300 cubes/hour; the gas flow was 300/3600 ═ 0.08 cubic meter per second.

1 cubic meter of gas is reduced by 1 ℃, 1290 joule heat needs to be released, and the temperature is reduced to be as follows through an evaporator: 2200/1290 ═ 0.08 ═ 21 degrees celsius/second, the cross-sectional wind velocity through the evaporator was about 2.5 meters/second, and the temperature difference between the front and rear of the evaporator was: 21/2.5 ═ 8.4 ℃ in centigrade; the recovery efficiency of the heat recovery device is calculated to be 80%.

When gas B1 was initially at 55 degrees Celsius, gas D was at a temperature of: 55-21/2.5-46.6 ℃, the temperature difference between the gas B1 and the gas D is 55-46.6-8.4 ℃, the recovery efficiency of the heat recovery device is 80%, and the temperature of the gas E is as follows: 46.6+8.4/2 × 0.8 ═ 49.96 degrees celsius, the temperature of gas C is 49.96+8.4/2 × 0.8 ═ 53.32 degrees celsius.

The plant continues to operate with a gas C temperature of: 53.32 degrees Celsius; the temperature of gas D was: 53.32-8.4 ═ 44.92 ℃ C; the temperature of gas E was: 44.92+8.4/2 × 0.8 ═ 48.28 degrees celsius.

The plant was operated continuously, the temperature of the gas C being: 55- (55-48.28) 0.8 ═ 49.624 degrees celsius; the temperature of gas D was: 49.624-8.4 ═ 41.224 ℃ C; the temperature of gas E was: 43.224+8.4/2 × 0.8 ═ 46.584 degrees celsius.

The results of drying using the dehumidification method of example 2 are shown in the following table:

TABLE 1 results of drying by the dehumidification method in example 2

In table 1, the average value of 40 g/hour was used for calculation, and dehumidification drying 1000/40/3600 was 0.007 hours. In practical use, the dehumidification time is influenced mainly by the evaporation amount of water. When the evaporation capacity of the water can be reached, the water generated by evaporation can be completely discharged by adopting a dehumidification method.

As can be seen from table 1, the drying apparatus of embodiment 1 is used in combination with the dehumidifying and drying method of embodiment 2, and the water discharge amount is increased rapidly, and the dehumidifying and drying efficiency is high.

Table 2 shows the comparison table of electric heating, heat pump, dehumidification and drying:

TABLE 2 comparison table of drying results in different ways

As can be seen from table 2 and the above description, the drying apparatus of embodiment 1 is used in conjunction with the dehumidifying and drying method of embodiment 2, which has high dehumidifying and drying efficiency, good effect and low energy consumption.

The existing air conditioner only utilizes the cold or heat generated by the refrigerant compressed by the compressor. When refrigerating, the air conditioner external unit dissipates heat, and the cold energy is used for refrigerating a room; when the air conditioner heats, the outdoor unit emits cold energy, and the heat is used for heating rooms. The utility model discloses use current air conditioner operation principle, the make full use of compressor operation, cold volume and heat that produce during the compressor compression refrigerant, and through the heat recovery mode, the moisture content of secondary in with the drying zone in the gas is got rid of, the secondary heats the circulating gas in the drying zone, make the gaseous relative humidity in the drying zone obviously reduce, it produces the dehydration appearance to guarantee the article that need to dry in the drying zone under low humidity environment, dry the article in the drying zone, article can not appear "getting damp" phenomenon, do not need to exchange gas to the external world simultaneously, reach the energy consumption and reduce, the purpose of saving time simultaneously.

The utility model discloses a drying method and drying equipment are under the actual stoving condition, owing to adopted the dehumidification drying method, and the humidity that drying zone article were located, dehumidification stoving will be less than other two kinds of drying zone humidity greatly, and drying zone article are located humidity lower, and outside moisture content that volatilizees is faster, so when adopting the dehumidification drying method, drying zone article outside moisture content that volatilizees will obviously be higher than other two kinds of drying method.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A dehumidification energy-saving drying device is characterized by comprising a compressor, a refrigerant pipeline connected with the compressor, a refrigerant running in the refrigerant pipeline, a drying chamber used for placing articles to be dried, a heating device for heating gas to form heated gas, an air supply device for conveying the heated gas to the drying chamber, a cold energy release device for releasing the cold energy of the refrigerant, a heat recovery device for cooling the heated gas discharged from the drying chamber and a cooling device for condensing and dehumidifying the gas, wherein a four-way valve is arranged on the refrigerant pipeline, a first expansion valve is arranged between the four-way valve and the cold energy release device, a second expansion valve is arranged between the four-way valve and the cooling device, and the heat recovery device comprises a first heat exchange channel and a second heat exchange channel, the drying chamber is internally provided with a drying area.

2. The dehumidification energy-saving drying apparatus according to claim 1, wherein said drying zone has a heated gas inlet and a heated gas outlet; the first heat exchange channel is provided with a heat recovery device gas inlet enabling the heated gas discharged from the heated gas outlet to enter the heat recovery device for heat exchange and a heat recovery device gas outlet enabling the gas after heat exchange to be discharged from the heat recovery device, and the second heat exchange channel is provided with a heat recovery inlet enabling the cooled gas cooled by the cooling device to be sent into the heat recovery device for heat exchange and a heat recovery outlet enabling the cooled gas after heat exchange to be discharged.

3. The dehumidifying energy-saving drying apparatus according to claim 2, wherein the heat recovery device comprises a heat exchange pipe and a housing, a first heat exchange channel is formed in the heat exchange pipe, and a second heat exchange channel is formed between the heat exchange pipe and the housing.

4. The drying apparatus of claim 1, wherein the drying apparatus comprises a heat releasing device for releasing heat, the heat releasing device comprising a first exhaust fan and a first condensing heater; the cold quantity releasing device comprises a second exhaust fan and a first evaporator; the cooling device includes a second evaporator.

5. The drying apparatus of claim 4, wherein the drying apparatus comprises a first return air duct communicating the drying chamber and the heat recovery device, a second return air duct for conveying the cooling air output from the cooling device to the heat recovery device, and a third return air duct for conveying the air output from the heat recovery outlet or the air output from the first return air duct to the air supply device, and a third condensing heater is disposed at one end of the third return air duct close to the air supply device.

6. The dehumidification energy-saving drying equipment according to claim 5, wherein the heating device is a second condensation heater; the refrigerant pipeline is sequentially communicated with the compressor, the first condensing heater, the second condensing heater, the third condensing heater and the four-way valve and then returns to the compressor, and four interfaces in the four-way valve are respectively communicated with the third condensing heater, the first evaporator, the second evaporator and the compressor; a refrigerant pipe is arranged between the second evaporator and the compressor.

7. The energy-saving dehumidification drying equipment is characterized by comprising a compressor, a refrigerant pipeline connected with the compressor, a refrigerant running in the refrigerant pipeline, a drying chamber used for placing articles to be dried, an electric heating device for heating gas to form heated gas, an air supply device for conveying the heated gas to the drying chamber, a cold quantity release device for releasing the cold quantity of the refrigerant, a heat recovery device for cooling the heated gas discharged from the drying chamber and a cooling device for condensing and dehumidifying the gas, wherein the electric heating device is arranged between the air supply device and the drying chamber, the heat recovery device comprises a first heat exchange channel and a second heat exchange channel, and a drying area is arranged in the drying chamber.