Dual-system grain cooler capable of improving refrigerating capacity

Abstract

The utility model discloses a double-system grain cooling machine capable of improving refrigerating capacity. The double-system grain cooling machine comprises a machine body, an air processing module, a first circulation module, a second circulation module and a condensation module. The machine body comprises a seat frame, a closed main machine and a breathable rack, and a closed cavity is formed in the closed main machine; an air duct is arranged in the closed cavity; an air treatment module is arranged on the air outlet side of the air duct; the air processing module comprises a first-stage evaporator, a second-stage evaporator and a reheating heat exchanger; an upper cavity and a lower cavity are formed in the breathable rack, a condensation module is arranged in the upper cavity, a first circulation module and a second circulation module are arranged in the lower cavity, the first circulation module penetrates into the upper cavity and the closed cavity, the condensation module, the first-stage evaporator and the reheating heat exchanger are communicated, and a first circulation system capable of reducing temperature and humidity is formed. And the second circulation module penetrates into the upper cavity and the closed cavity to communicate the condensation module with the second-stage evaporator, so that a second circulation system capable of cooling is formed. According to the utility model, the refrigerating capacity can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a grain cooler, especially to a double-system grain cooler improving refrigerating capacity. BACKGROUND

[0002] The grain cooler is mainly applied to the place such as granary and storage, and is used for reducing air temperature, and its working principle is that: the air needing cooling treatment is sucked into the body, and is cooled by the cooperation between the refrigerating system and the air supply module, and then enters the ground cage through the air inlet of the granary, and is sent to the bottom of the grain pile, and due to the action of negative pressure, the low-temperature air flows and diffuses to the upper part, so that the temperature of the grain is reduced, and finally the air passes through a certain thickness of the grain layer, and returns to the air inlet of the body through the air outlet of the granary.

[0003] However, the existing grain cooler usually has only one refrigerating system, and when the refrigerating capacity of the refrigerating system cannot meet the refrigerating capacity demand of the site, only the number of the grain coolers can be increased to improve the refrigerating capacity, which is inconvenient to use. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a double-system grain cooler improving refrigerating capacity.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] The utility model provides a double-system grain cooler improving refrigerating capacity, which comprises a body, an air treatment module, a first circulation module, a second circulation module and a condensing module.

[0007] The air treatment module comprises a primary evaporator, a secondary evaporator and a reheating heat exchanger which are arranged in the air outlet side of the air duct in a stacked manner.

[0008] The air-permeable rack is horizontally provided with a partition plate in the middle section of the inside, and the partition plate separates an upper cavity in the upper layer and a lower cavity in the lower layer; the upper cavity is internally provided with the condensing module; the lower cavity is internally provided with the first circulating module and the second circulating module, and the first circulating module penetrates into the upper cavity and the closed cavity, and connects the condensing module, the first evaporator and the reheating heat exchanger, thereby forming a first circulating system capable of reducing temperature and humidity; the second circulating module penetrates into the upper cavity and the closed cavity, and connects the condensing module and the second evaporator, thereby forming a second circulating system capable of reducing temperature.

[0009] As a further technical scheme of the utility model, the reheating heat exchanger is provided with a PWM flow regulating valve or an electric ball valve on both ends.

[0010] As a further technical scheme of the utility model, the first circulating module and the second circulating module are the same in structure and both include an upper circulating pipeline group and a lower circulating pipeline group, wherein the upper circulating pipeline group and the lower circulating pipeline group of the first circulating module are connected with the first evaporator and the condensing module respectively, and the upper circulating pipeline group and the lower circulating pipeline group of the second circulating module are connected with the second evaporator and the condensing module respectively.

[0011] As a further technical scheme of the utility model, the upper circulating pipeline group is internally provided with an air-liquid separator and a compressor.

[0012] As a further technical scheme of the utility model, the lower circulating pipeline group is internally provided with an expansion valve, a sight glass, a drying filter and a liquid accumulator.

[0013] As a further technical scheme of the utility model, the upper circulating pipeline group is provided with a low-pressure gauge and a low-pressure controller on the pipeline connecting the air-liquid separator and the evaporator.

[0014] As a further technical scheme of the utility model, the upper circulating pipeline group is provided with a high-pressure controller and a high-pressure gauge on the pipeline connecting the compressor and the condensing module.

[0015] As a further technical scheme of the utility model, the condensing module includes two condensers and a plurality of condensing fans arranged above the two condensers, and forced heat exchange is realized by the condensing fans cooperating with the condensers.

[0016] As a further technical scheme of the utility model, the seat frame is provided with a front traction wheel assembly at the front end of the bottom and a rear wheel assembly at the rear end of the bottom.

[0017] Compared with the prior art, the double-system grain cooler for improving refrigerating capacity has the advantages that the double-system grain cooler for improving refrigerating capacity is capable of operating with the first circulation system alone when the refrigerating capacity demand is less, and is capable of operating with the first circulation system and the second circulation system simultaneously when the refrigerating capacity demand is larger, so that the refrigerating capacity is improved, and the double-system grain cooler for improving refrigerating capacity is more convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The schematic diagram of the double-system grain cooler for improving refrigerating capacity.

[0019] Figure 2 The schematic diagram of the double-system grain cooler for improving refrigerating capacity.

[0020] Figure 3 The A-A sectional view of the double-system grain cooler for improving refrigerating capacity. Figure 2 The B-B sectional view of the double-system grain cooler for improving refrigerating capacity.

[0021] Figure 4 The B-B sectional view of the double-system grain cooler for improving refrigerating capacity. Figure 2 The B-B sectional view of the double-system grain cooler for improving refrigerating capacity.

[0022] Figure 5 The schematic diagram of the double-system grain cooler for improving refrigerating capacity after the closed main machine is removed and the pipeline is hidden.

[0023] Figure 6 The bottom schematic diagram of the seat frame. DETAILED DESCRIPTION

[0024] The specific embodiments of the double-system grain cooler for improving refrigerating capacity will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the double-system grain cooler for improving refrigerating capacity, and are not intended to limit the protection scope of the double-system grain cooler for improving refrigerating capacity.

[0025] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , a double-system grain cooler for improving refrigerating capacity, comprising a machine body 10, an air treatment module 20, a first circulation module 30, a second circulation module 40 and a condensation module 50.

[0026] The machine body 10 comprises a seat frame 11, a closed main machine 12 arranged on one side of the seat frame 11, and a ventilating machine frame 13 arranged on the other side of the seat frame 11, the closed main machine 12 is provided with an air inlet 121 on one side thereof, an air outlet 122 on the other side thereof, and a closed cavity 101 formed in the closed main machine 12; the air inlet 121 is detachably provided with a filter screen 123 in the air inlet 121; the closed cavity 101 is correspondingly provided with an air duct 102 covering the air inlet 121 at the position of the air inlet 121 and a supply air fan 124 and a wind guide pipe 125 connecting the supply air fan 124 and the air outlet 122 at the position of the air outlet 122; the air duct 102 is provided with the air treatment module 20 on the air outlet side of the air duct 102, so that the air treatment module 20 covers the air outlet side of the air duct 102; the air treatment module 20 comprises a first evaporator 21, a second evaporator 22 and a reheating heat exchanger 23 arranged in layers on the air outlet side of the air duct 102.

[0027] For further understanding Figure 5 , the ventilating machine frame 13 is horizontally provided with a partition plate 131 in the middle section of the ventilating machine frame 13, so as to form an upper cavity 132 in the upper layer and a lower cavity 133 in the lower layer, the upper cavity 132 is provided with the condensation module 50 in the upper cavity 132, the lower cavity 133 is provided with the first circulation module 30 and the second circulation module 40 in the lower cavity 133, and the first circulation module 30 penetrates into the upper cavity 132 and the closed cavity 101, so as to connect the condensation module 50, the first evaporator 21 and the reheating heat exchanger 23, and form a first circulation system capable of cooling and dehumidifying; the second circulation module 40 penetrates into the upper cavity 132 and the closed cavity 101, so as to connect the condensation module 50 and the second evaporator 22, and form a second circulation system capable of cooling.

[0028] Further, in the embodiment, one side of the air duct 102 towards the air outlet side is an inclined surface inclined downward from top to bottom towards the air outlet side, so that the air treatment module 20 correspondingly covers the air outlet side of the air duct 102 in a downward inclined manner, and the contact surface of the air and the air treatment module 20 is increased.

[0029] Further, in the embodiment, the reheating heat exchanger 23 is provided with a PWM flow regulating valve 231 or an electric ball valve on both ends thereof.

[0030] Further, in the embodiment, the first circulation module 30 and the second circulation module 40 have the same structure, and both comprise an upper circulation pipeline group 31 and a lower circulation pipeline group 32, wherein the upper circulation pipeline group 31 and the lower circulation pipeline group 32 of the first circulation module 30 are connected with the first evaporator 21 and the condensation module 50 respectively, and the upper circulation pipeline group 31 and the lower circulation pipeline group 32 of the second circulation module 40 are connected with the second evaporator 22 and the condensation module 50 respectively.

[0031] Further, in the embodiment, the upper circulation pipeline group 31 is provided with a gas-liquid separator 311 and a compressor 312 therein, and the lower circulation pipeline group 32 is provided with an expansion valve 321, a sight glass 322, a drying filter 323 and a liquid accumulator 324 therein.

[0032] Further, in the embodiment, the upper circulation pipeline group 31 is provided with a low-pressure gauge 301 and a low-pressure controller 302 on the pipeline connecting the gas-liquid separator 311 and the evaporator.

[0033] Further, in the embodiment, the upper circulation pipeline group 31 is provided with a high-pressure controller 303 and a high-pressure gauge 304 on the pipeline connecting the compressor 312 and the condensing module 50.

[0034] Further, in the embodiment, the condensing module 50 comprises two condensers 51 and a plurality of condensing fans 52 arranged above the two condensers 51, and the condensing fans 52 cooperate with the condensers 51 to realize forced heat exchange.

[0035] Further, referring to Figure 6 In the embodiment, the seat frame 11 is provided with a front wheel assembly 61 at the front end of the bottom and a rear wheel assembly 62 at the rear end of the bottom, and the front wheel assembly 61 and the rear wheel assembly 62 cooperate to drive the grain cooler to move.

[0036] It can be understood that the use method of the double-system grain cooler for improving refrigerating capacity is as follows: when the refrigerating capacity demand is small, the first circulation system operates alone, and when the refrigerating capacity demand is large, the first circulation system and the second circulation system operate synchronously.

[0037] The operation mode of the first circulation system is that the compressor 312 of the first circulation system compresses low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas, the high-temperature and high-pressure gas is divided into two paths, one path of the high-temperature and high-pressure gas enters the condensing module 50, forced heat exchange is realized through the condensing fan 52, heat is taken away, the other path of the high-temperature and high-pressure gas enters the reheating heat exchanger 23 through the PWM flow regulating valve 231 or the electric ball valve control, the high-temperature and high-pressure gas of the refrigerant is controlled in flow after the reheating heat exchanger 23, the temperature of the air in the reheating heat exchanger 23 is raised, then, the two paths of the high-temperature and high-pressure gas of the refrigerant are collected after heat exchange, enter the liquid accumulator 324, pass through the drying filter 323, the sight glass 322 in turn, pass through the expansion valve 321 in a throttling manner, the refrigerant becomes low-temperature and low-pressure liquid, evaporates into gas in the primary evaporator 21, absorbs heat of the air passing through the primary evaporator 21, so that the air is cooled, and the low-temperature and low-pressure refrigerant gas enters the compressor 312 after separation of a small part of refrigerant liquid through the gas-liquid separator 311, and the cycle is completed.

[0038] The operation mode of the second circulation system is that the compressor 312 of the second circulation system compresses the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure gas, the high-temperature and high-pressure gas enters the condensing module 50, forced heat exchange is carried out through the condensing fan 52, heat is taken away, enters the liquid accumulator 324, sequentially passes through the dry filter 323, the sight glass 322, is throttled through the expansion valve 321, the refrigerant becomes low-temperature and low-pressure liquid, is evaporated into gas in the secondary evaporator 22, absorbs the heat of the air passing through the secondary evaporator 22, so that the air is cooled, and the low-temperature and low-pressure refrigerant is separated from a small part of refrigerant liquid after passing through the gas-liquid separator 311, and the refrigerant gas enters the compressor 312 to be compressed, so that one cycle is completed.

[0039] Therefore, the air to be treated is filtered through the filter screen 123 after entering the closed cavity 101 through the air inlet 121, is cooled by sequentially passing through the primary evaporator 21 and the secondary evaporator 22, is heated and dehumidified by passing through the reheating heat exchanger 23, and is output through the air outlet 122 by sequentially passing through the air supply fan 124 and the air guide pipe 125.

[0040] It can be understood that the temperature and humidity control method for improving the refrigerating capacity of the dual-system grain cooler is as follows: the temperature and humidity after the primary evaporator 21, the temperature and humidity after the secondary evaporator 22, the air supply temperature and humidity are used for temperature and humidity control, and the PWM flow regulating valve 231 or the electric ball valve used at the two ends of the reheating heat exchanger 23 is different.

[0041] The operation of the PWM flow regulating valve 231 is divided into two stages: a “load state”, at this time the electromagnetic valve is always open; and an “unloading state”, at this time the electromagnetic valve is closed. In the load state, the refrigerant passes through. However, in the unloading state, the refrigerant does not pass through.

[0042] At this stage, let us introduce the concept of "cycle time". A cycle time includes "load state" time and "unloading state" time. The combination of these two time stages determines the refrigerant flow through the reheat heat exchanger 23, thereby determining the heating amount of the reheat heat exchanger 23. For example: in a 20-second cycle time, if the load state time is 10 seconds and the unloading state time is 10 seconds, adjust the different duty cycles, the refrigerant adjustment amount is 10 seconds x 100% + 10 seconds x 0% / 20 = 50%. If the load state time is 15 seconds and the unloading state time is 5 seconds in the same cycle time, adjust the different duty cycles, then the refrigerant adjustment amount is 75%. The load state time and the unloading state time of the PWM flow regulating valve 1 and the PWM flow regulating valve 2 are controlled synchronously, so that the refrigerant flow through the reheat heat exchanger 23 can be adjusted. The capacity is the average of the sum of the load state and the unloading state time. By changing the load state time and the unloading state time, the refrigerant flow of the reheat heat exchanger can be adjusted between 10% and 100%.

[0043] And when using an electric ball valve, the heating amount of the reheat heat exchanger 23 is controlled by the following method: using an electric ball valve at both ends of the reheat heat exchanger 23, controlling the opening of the electric ball valve through the stepping motor of the electric ball valve, and controlling the refrigerant flow through the reheat heat exchanger 23, thereby controlling the heating amount of the reheat heat exchanger 23.

[0044] In summary, the double-system grain cooler for improving refrigerating capacity provided by the present application can operate independently by the first circulation system when the refrigerating capacity demand is small, and can operate synchronously by the first circulation system and the second circulation system when the refrigerating capacity demand is large, thereby improving the refrigerating capacity and being more convenient to use.

[0045] As long as the various different embodiments of the present application are not combined in violation of the inventive concept of the present application, they should be considered as disclosed by the present application; within the technical concept of the present application, any combination of the technical solutions and different embodiments without violating the inventive concept of the present application should be within the protection scope of the present application.

Claims

1. A dual-system grain cooler for increasing cooling capacity, characterized in that: The system includes a body (10), an air handling module (20), a first circulation module (30), a second circulation module (40), and a condensation module (50). The body (10) includes a frame (11), a closed main unit (12) disposed on one side of the frame (11), and a ventilated frame (13) disposed on the other side of the frame (11). The closed main unit (12) has an air inlet (121) on one side, an air outlet (122) on the other side, and a closed cavity (101) formed therein. The closed cavity (101) has an air duct (102) corresponding to the location of the air inlet (121) to cover the air inlet (121), and a blower (124) and a guide pipe (125) connecting the blower (124) and the air outlet (122) corresponding to the location of the air outlet (122). The air handling module (20) is disposed on the air outlet side of the air duct (102). The air handling module (20) includes a primary evaporator (21), a secondary evaporator (22) and a reheat heat exchanger (23) stacked on the air outlet side of the air duct (102); The ventilated frame (13) has a horizontal partition (131) in the middle section, which forms an upper cavity (132) and a lower cavity (133). The upper cavity (132) contains the condensing module (50), and the lower cavity (133) contains the first circulation module (30) and the second circulation module (40). The first circulation module (30) penetrates the upper cavity (132) and the closed cavity (101), connecting the condensing module (50), the first-stage evaporator (21), and the reheat heat exchanger (23) to form a first circulation system capable of cooling and dehumidifying. The second circulation module (40) penetrates the upper cavity (132) and the closed cavity (101), connecting the condensing module (50) and the second-stage evaporator (22) to form a second circulation system capable of cooling.

2. The dual-system grain cooler with increased cooling capacity according to claim 1, characterized in that: The reheat heat exchanger (23) is equipped with a PWM flow regulating valve (231) or an electric ball valve at both ends.

3. The dual-system grain cooler with increased cooling capacity according to claim 1, characterized in that: The first circulation module (30) and the second circulation module (40) have the same structure, both including an upper circulation pipe group (31) and a lower circulation pipe group (32). The upper circulation pipe group (31) and the lower circulation pipe group (32) of the first circulation module (30) are respectively connected to the first-stage evaporator (21) and the condenser module (50), while the upper circulation pipe group (31) and the lower circulation pipe group (32) of the second circulation module (40) are respectively connected to the second-stage evaporator (22) and the condenser module (50).

4. The dual-system grain cooler with increased cooling capacity according to claim 3, characterized in that: The upper circulation pipeline assembly (31) is equipped with a gas-liquid separator (311) and a compressor (312).

5. The dual-system grain cooler with increased cooling capacity according to claim 3, characterized in that: The lower circulation pipeline assembly (32) is equipped with an expansion valve (321), a sight glass (322), a dryer filter (323), and a reservoir (324).

6. The dual-system grain cooler with increased cooling capacity according to claim 4, characterized in that: The upper circulation pipeline group (31) is equipped with a low pressure gauge (301) and a low pressure controller (302) on the pipeline connecting the gas-liquid separator (311) and the evaporator.

7. The dual-system grain cooler with increased cooling capacity according to claim 4, characterized in that: The upper circulation pipeline group (31) is equipped with a high pressure controller (303) and a high pressure gauge (304) on the pipeline connecting the compressor (312) and the condenser module (50).

8. The dual-system grain cooler with increased cooling capacity according to claim 1, characterized in that: The condensing module (50) includes two condensers (51) and several condensing fans (52) arranged above the two condensers (51). Forced heat exchange is achieved by the condensing fans (52) working in conjunction with the condensers (51).

9. The dual-system grain cooler with increased cooling capacity according to claim 1, characterized in that: The seat frame (11) has a traction front wheel assembly (61) at the front end of its bottom and a rear wheel assembly (62) at the rear end of its bottom.

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