CN204787630U - Negative pressure heat pump drying device - Google Patents

Abstract

The utility model discloses a negative pressure heat pump drying device, through synchronous starting heat pump and air extractor, air in the air extractor extraction baking house makes the interior atmospheric depression of baking house, is less than the ambient atmosphere and presses to the negative pressure stoving is realized to the feasible boiling point depression that is arranged in the water of the material of baking house. Compare in the prior art scheme of heat pump and air extractor " asynchronous starting ", the utility model discloses not only need not to change original drying device's mechanism, convenient operation, have moreover the power consumption less, characteristics such as for dry is fast, application scope is wide.

Description

A kind of negative pressure heat pump drying device

[technical field]

The utility model belongs to dry field, is specifically related to a kind of negative pressure heat pump drying device for drying materials.

[background technology]

Dry and refer to that passing into hot-air evaporates moisture in material and the process taken away, be widely used in tobacco, agricultural byproducts, medicinal material, food, weaving, chemical industry, plating, urban public utilities, heating, butcher, cultivate, hotel, school, hospital, industry and the field such as engineering.The evaporation drying course power consumption that moisture in material is heated to be gaseous state from liquid state is huge, according to incompletely statistics, most of developed country accounts for 7% ~ 15% of the total power consumption in the whole nation for the energy that material drying consumes, and the thermal efficiency is only 20% ~ 50%, and energy consumption is huge.

Compared to traditional poor efficiency, high cost, heavy-polluted traditional drying technology, heat pump drying because of its energy-conserving and environment-protective, dry the features such as quality is high, applied widely and bring great technological revolution to drying industry.Existing heat pump drying device mainly comprises hydrofuge type and dehumidification type two kinds: (1) the former by heating drying room inner air, when drying room humidity reaches a certain amount of, utilize outside low humidity air to take away damp atmosphere, thus realize the object of material drying by hydrofuge; (2) the latter is equally by heating drying room inner air, and simultaneously at drying room built-in evaporator, in drying room, damp-heat air is after evaporimeter absorbing and cooling temperature, is condensed into droplet and flows out from conduit, to realize the object of material drying.In addition, notification number is that the patent of CN204346019U also discloses a kind of air source heat pump drying room using evaporimeter air inlet as drying room fresh wind port, the program has the function of hydrofuge and dehumidifying concurrently, drying capacity and the energy-saving potential of drying room is expanded, to solve the energy loss problem in existing hydrofuge type and dehumidification type heat pump dryer drying course by heat pump casing being divided into two inner chambers.But above-mentioned existing heat pump dryer is all realize hydrofuge and/or dehumidifying at ambient pressure, when heating drying room, in drying room, air intensity does not change, and no matter is that hydrofuge or dehumidifying all need be carried out under fixing gasification temperature or condensing temperature, consumes energy larger.

[utility model content]

For above-mentioned the deficiencies in the prior art, the utility model aims to provide the negative pressure heat pump drying device of a kind of heat pump and air exhauster " synchronous averaging ", by heating and Exsufflation synchronization operation, on the basis not changing existing equipment structure, realize negative pressure dehumidifying, there is the features such as energy-conservation, efficient, easy to operate, action effect is remarkable and applied widely.

A kind of negative pressure heat pump drying device described in the utility model, it is characterized in that, comprise microcomputer controller, drying room, heat pump main frame, air exhauster, condenser, shutter and two or more circulating fan, described air exhauster is connected with drying room, air exhauster inside at least arranges a circulating fan, and air exhauster arranges exhaust outlet; Described condenser is arranged on drying room bottom, and described shutter is arranged on bottom drying room, at least arranges a circulating fan between condenser and shutter; Described heat pump main frame is connected with condenser by refrigerant circulation pipe, and heat pump main frame, air exhauster, circulating fan are all electrically connected with microcomputer controller, and described microcomputer controller controls heat pump main frame and air exhauster synchronous averaging.

During said apparatus work, its method of work is: control heat pump main frame and air exhauster synchronous averaging by microcomputer controller, the condenser be connected with heat pump main frame is to drying room heat supply, air exhauster extracts air in drying room simultaneously, drying room internal gas pressure is made to drop to setting value, heat pump main frame and air exhauster synchronously quit work, the moisture content heat absorption evaporation in drying room material; When temperature drops to predetermined value in drying room, open shutter and put extraneous air into, microcomputer controller starts circulating fan, drives humid air in drying room after exhaust outlet is discharged, to close shutter; So go round and begin again, until material reaches setting degree of drying, heat pump main frame and air exhauster quit work.

As described in the background section, no matter be hydrofuge type dryer, dehumidification type dryer, or hydrofuge and the integrated dryer of dehumidifying, it all needs to arrange air exhauster, but air exhauster starts time all different from heat pump, all that heat pump first starts and adds hot-air, until in drying room air ambient air pressure evaporation after, air exhauster is restarted, realize drying, namely prior art is the technical scheme of heat pump and air exhauster " asynchronous starting ", and the utility model is the technical scheme of heat pump and air exhauster " synchronous averaging ", the utility model is not only without the need to changing the mechanism of original drying unit, easy to operate, and it is few to have power consumption, drying materials speed is fast, the feature such as applied widely.Particularly, this technical scheme passes through synchronous averaging heat pump and air exhauster, while giving drying room heat supply, air exhauster extracts air in drying room, drying room internal gas pressure is declined, lower than ambient atmosphere pressure, thus the boiling point of the water of the material being arranged in drying room is reduced, realize negative pressure oven dry.Compared to the prior art realizing drying in ambient air pressure, this technical scheme declines due to air pressure, accordingly, the boiling point of water reduces, thus can evaporation of water be realized without the need to reaching higher temperature in drying room, needed for drying room, heat supply is less, can realize the object removing moisture content in material fast, be applicable to various types of drying unit, applied range.

The utility model can also be perfect further by the following technical programs:

As preferably, comprise the pressure sensor and temperature sensor that are arranged on drying room inside, all wired with microcomputer controller or the wireless connections of described pressure sensor and temperature sensor, microcomputer controller knows atmospheric pressure value in drying room by obtaining pressure sensor, the temperature value known in real time by temperature sensor in drying room, thus air pressure in dynamic monitoring drying room and temperature, according to feedback result real-time monitoring heat pump main frame, air exhauster, shutter and circulating fan, guarantee that drying room is in desirable drying environment.

As preferably, comprise shutter motor, described shutter motor is electrically connected or wired connection with microcomputer controller is wired, and described shutter motor is electrically connected with shutter; Under the control of microcomputer controller, described shutter Electric Machine Control shutter electric opening and closedown.

In the utility model, above-mentioned air pressure setting value is lower than ambient pressure, and described temperature predetermined value refers to the temperature lower than the boiling point of water under above-mentioned air pressure setting value.Such as, set an atmospheric pressure value in advance in microcomputer controller, such as setting atmospheric pressure value is 0.1Mpa, its correspondence the boiling point of water be 99.1 degree, temperature predetermined value can be arranged the temperature lower than 99.1 degree, as 98 degree, 97 degree or other temperature.

As a kind of technical scheme, described drying room is made up of three drying room bodies and dodge gate, and described drying room body is made up of internal layer, heat-insulation layer and skin, and insulation drying room body can reduce drying room energy loss, realizes energy-conservation, high efficiency drying; Dodge gate comprises the spring pull bar that two sides is thereon arranged.Dodge gate comprises the spring pull bar that two sides is thereon arranged; When dodge gate closes, drag hook falls in groove, and door is fixed; When lifting, when reaching a certain height, spring pull bar is moved to the state of upwards propping up door.

As a kind of technical scheme, also comprise blast pipe and evaporimeter, one end of described blast pipe is connected with exhaust outlet, arranges at least one circulating fan in blast pipe, and described evaporimeter is connected with the other end of blast pipe, and evaporimeter is connected with drying room.Exhaust outlet connects blast pipe, blast pipe is under the effect of circulating fan, the high-temperature vapor of discharging in drying room is imported in evaporimeter, high-temperature vapor heat release is liquefied as liquid and discharges, liquefaction liberated heat is imported to heat supply in drying room simultaneously by evaporimeter, maximizes capacity usage ratio.

In sum, negative pressure heat pump drying device disclosed in the utility model, disclose the technical scheme of heat pump and air exhauster " synchronous averaging " innovatively, by synchronous averaging heat pump and air exhauster, air exhauster extracts air in drying room, drying room internal gas pressure is declined, lower than ambient atmosphere pressure, thus the boiling point of the water of the material being arranged in drying room is reduced, realize negative pressure oven dry.Compared to the prior art of heat pump and air exhauster " asynchronous starting ", the utility model is not only without the need to changing the mechanism of original drying unit, easy to operate, and have power consumption less, the feature such as drying materials speed is fast, applied widely.

[accompanying drawing explanation]

Accompanying drawing 1 is the structural representation of embodiment 1;

Accompanying drawing 2 is structural representations of embodiment 2.

1-microcomputer controller; 2-drying room; 2-1-internal layer; 2-2-heat-insulation layer; 2-3-is outer; 3-heat pump main frame; 4-air exhauster; 5-condenser; 6-shutter; 7-circulating fan; 8-exhaust outlet; 9-refrigerant circulation pipe; 10-pressure sensor; 11-temperature sensor; 12-shutter blower fan; 13-dodge gate; 13-1-spring pull bar; 14-blast pipe; 15-evaporimeter.

[detailed description of the invention]

Embodiment 1

As shown in Figure 1, present embodiment discloses a kind of negative pressure heat pump drying device and method of work thereof, comprise microcomputer controller 1, drying room 2, heat pump main frame 3, air exhauster 4, condenser 5, shutter 6, shutter motor 12, three circulating fans 7, pressure sensor 10 and temperature sensors 11.

Drying room 2 is made up of three drying room bodies and dodge gate 13, and drying room body forms a boxlike casing by internal layer 2-1, heat-insulation layer 2-2 and outer 2-3, and dodge gate 13 comprises the spring pull bar 13-1 that two sides is thereon arranged.It is outside that heat pump main frame 3 is arranged on drying room 2, and heat pump main frame 3 is connected with the condenser 5 being arranged on drying room 2 inside by refrigerant circulation pipe 9, and condenser 5 is arranged on the Lower Half of drying room 2 inside; Shutter 6 is arranged on bottom drying room 2, arranges two circulating fans 7 between condenser 5 and shutter 6; Air exhauster 4 is arranged on the top of drying room body and is connected with drying room 2, and air exhauster 4 inside arranges a circulating fan 7, and air exhauster 4 side arranges exhaust outlet 8; Pressure sensor 10 and temperature sensor 11 are all arranged on drying room 2 top; Heat pump main frame 3 and air exhauster 4 are all electrically connected with microcomputer controller 1, in addition, circulating fan 7, pressure sensor 10, temperature sensor 11 and shutter motor 12 are all electrically connected with microcomputer controller 1 (not drawing in annexation Fig. 1), and shutter motor 11 is electrically connected with shutter 12 (not drawing in annexation Fig. 1).

During work, specifically comprise the following steps:

(1), when lifting spring pull bar 13-1 to certain altitude, spring pull bar 13-1 is moved to and upwards props up dodge gate, opens dodge gate 13, puts into multilayers bin in drying room 2, is placed on by material on material frame; Then the drag hook of spring pull bar 13-1 is fallen in groove, dodge gate 13 is fixed;

(2) opening power, starts instrument, sets the air pressure setting value 0.1Mpa lower than ambient atmosphere pressure and temperature predetermined value 98 degree in microcomputer controller;

(3) heat pump main frame 3 and air exhauster 4 synchronous averaging is controlled by microcomputer controller 1, condenser 5 is to the inner heat supply of drying room 2, air exhauster 4 extracts air in drying room 2 simultaneously, air pressure in pressure sensor 10 dynamic monitoring drying room 2 by result of detection Real-time Feedback to microcomputer controller 1, treat that drying room 2 internal gas pressure drops to 0.1Mpa, heat pump main frame 3 and air exhauster 4 synchronously quit work, the moisture content heat absorption evaporation in the material in drying room 2;

(4) temperature in temperature sensor 11 dynamic monitoring drying room 2 by result of detection Real-time Feedback to microcomputer controller 1, when in drying room 2, temperature drops to 98 degree, microcomputer controller 1 controls shutter motor 12 and automatically opens shutter 6 and put extraneous air into, microcomputer controller 1 starts three circulating fans 7 simultaneously, in drive drying room 2, humid air is after exhaust outlet 8 is discharged, when pressure sensor 10 air pressure monitored in drying room 2 equals ambient atmosphere pressure, microcomputer controller 1 controls shutter motor 12 and closes shutter 6;

(5) so go round and begin again, until material reaches setting degree of drying.

Embodiment 2

As shown in Figure 2, as different from Example 1, the present embodiment also comprises blast pipe 14 and evaporimeter 15, one end of blast pipe 14 is connected with exhaust outlet 8, two circulating fans 7 are set in blast pipe 14, circulating fan 7 is electrically connected with microcomputer controller 1, and evaporimeter 15 is connected with the other end of blast pipe 14, and evaporimeter 15 is connected with drying room 2.Exhaust outlet 8 connects blast pipe 14, blast pipe 14 is under the effect of circulating fan 7, the high-temperature vapor of discharging in drying room 2 is imported in evaporimeter 15, high-temperature vapor heat release is liquefied as liquid and discharges, liquefaction liberated heat is imported to heat supply in drying room 2 simultaneously by evaporimeter 15, maximizes capacity usage ratio.

Claims (5)

1. a negative pressure heat pump drying device, it is characterized in that, comprise microcomputer controller (1), drying room (2), heat pump main frame (3), air exhauster (4), condenser (5), shutter (6) and two or more circulating fan (7), described air exhauster (4) is connected with drying room (2), air exhauster (4) inside at least arranges a circulating fan (7), and air exhauster (4) arranges exhaust outlet (8); Described condenser (5) is arranged on drying room (2) bottom, described shutter (6) is arranged on drying room (2) bottom, at least arranges a circulating fan (7) between condenser (5) and shutter (6); Described heat pump main frame (3) is connected with condenser (5) by refrigerant circulation pipe (9), heat pump main frame (3), air exhauster (4), circulating fan (7) are all electrically connected with microcomputer controller (1), and described microcomputer controller (1) controls heat pump main frame (3) and air exhauster (4) synchronous averaging.

2. device as claimed in claim 1, it is characterized in that, comprise and be arranged on the inner pressure sensor (10) of drying room (2) and temperature sensor (11), all wired with microcomputer controller (1) or the wireless connections of described pressure sensor (10) and temperature sensor (11).

3. device as claimed in claim 1, it is characterized in that, comprise shutter motor (12), described shutter motor (12) is wired or wired connection with microcomputer controller (5), and described shutter motor (11) is electrically connected with shutter (12).

4. device as claimed in claim 1, it is characterized in that, described drying room (2) is made up of three drying room bodies and dodge gate (13), described drying room body is made up of internal layer (2-1), heat-insulation layer (2-2) and skin (2-3), and described dodge gate (13) comprises the spring pull bar (13-1) that two sides is thereon arranged.

5. device as claimed in claim 1, it is characterized in that, also comprise blast pipe (14) and evaporimeter (15), one end of described blast pipe (14) is connected with exhaust outlet (8), at least one circulating fan (7) is set in blast pipe (14), described evaporimeter (15) is connected with the other end of blast pipe (14), and described evaporimeter (15) is connected with drying room (2).