CN214148503U

CN214148503U - Heat recovery system for refrigeration house

Info

Publication number: CN214148503U
Application number: CN202023339002.3U
Authority: CN
Inventors: 朱均; 廖邦琴; 廖宇
Original assignee: Shenzhen Junjia Electromechanical Equipment Co ltd
Current assignee: Shenzhen Junjia Electromechanical Equipment Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-07
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to a heat recovery system for freezer belongs to the refrigeration technology field, and it includes heat exchanger, water circulation mechanism, wet return, outlet pipe, heat medium pipe and temperature control case, the heat medium pipe is located in the heat exchanger and is linked together with condenser and compressor, the heat exchanger both ends are equipped with refrigerant import and refrigerant export, the temperature control case communicates in the refrigerant import, outlet pipe one end communicates in temperature control case and the other end communicates in the output of water circulation mechanism, wet return one end communicates in refrigerant export and the other end communicates in the input of water circulation mechanism, sliding connection has the current-limiting plate on being close to a refrigerant import inside wall in the temperature control case, temperature control bottom of the case portion is provided with the drive assembly who is used for going up and down according to temperature drive current-limiting plate. The heat recovery system has the effect of controlling the water flow in the heat exchanger according to the temperature so as to maintain the balance of the heat recovery effect and improve the quality of the heat recovery system.

Description

Heat recovery system for refrigeration house

Technical Field

The application relates to the technical field of refrigeration, in particular to a heat recovery system for a refrigeration house.

Background

The refrigerator is usually used for storing fresh foods and prolonging the shelf life of the fresh foods. The refrigeration house is refrigerated by the refrigerating system, and the heat released by the condenser of the refrigerating system is usually discharged to the surrounding environment by the condenser fan, which is a huge waste for users needing heat sources and brings certain waste heat pollution to the surrounding environment.

At present, patent publication No. CN110542272A discloses a heat recovery device of a refrigeration system. The invention comprises a water circulation mechanism and a heat exchanger, wherein the heat exchanger is provided with a heat medium inlet, a heat medium outlet, a refrigerant inlet and a refrigerant outlet, the heat medium inlet is communicated with the output end of a compressor, the heat medium outlet is communicated with a condenser, the water circulation mechanism comprises a water outlet pipe and a water return pipe, the water outlet pipe is communicated with the refrigerant inlet of the heat exchanger, the water return pipe is communicated with the refrigerant outlet of the heat exchanger, and the recovery and the utilization of waste heat are realized, wherein the refrigerant is continuously circulated in the water circulation mechanism after heat transfer in the heat exchanger, and the temperature of the refrigerant is gradually increased to reach a preset discharge value along with the heat transfer, at the moment, a drain pipe in a circulation water tank starts to drain water, the water return pipe and the water outlet pipe are closed simultaneously to ensure that the temperature of the drained water is maintained at the preset discharge value, in order to keep the continuous operation of the heat exchanger, a valve of a water suction pipe can be directly opened to directly replace the circulation water tank and the water return pipe to form another circulation system together with the circulation water tank and the heat pipe The inside of the exchanger is circulated.

In view of the above-mentioned related art, the inventor believes that there is a defect that the heat exchange rate in the heat exchanger gradually decreases until the temperature of the refrigerant gradually increases and does not reach the preset discharge value, and the difference of the water temperature change is large after the circulation tank cycle is changed to the tank cycle, resulting in unbalance of the cooling effect in the heat exchanger, which is to be further improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of unbalanced refrigeration effect in the heat exchanger, the application provides a heat recovery system for a refrigeration house.

The application provides a heat recovery system for freezer adopts following technical scheme:

the utility model provides a heat recovery system for freezer, includes heat exchanger, water circulation mechanism, heat medium pipe, outlet pipe, wet return and temperature control case, the heat medium pipe is located in the heat exchanger and is linked together with condenser and compressor, the heat exchanger both ends are equipped with refrigerant import and refrigerant export, the temperature control case communicates in the refrigerant import, outlet pipe one end communicates in temperature control case and the other end communicates in the output of water circulation mechanism, wet return one end communicates in refrigerant export and the other end communicates in the input of water circulation mechanism, sliding connection has the current-limiting plate on being close to a refrigerant import inside wall in the temperature control case, temperature control bottom of the case portion is provided with and is used for carrying out the drive assembly who goes up and down according to temperature drive current-limiting plate.

By adopting the technical scheme, the arranged driving assembly can drive the flow limiting plate to lift according to the water temperature flowing into the temperature control box, so that the water flow of the refrigerant inlet of the heat exchanger is controlled, and the heat exchanger can keep the heat exchange efficiency balanced under the change of different water temperatures.

Optionally, drive assembly includes expansion cylinder, piston, valve rod and halfpace ejector pad, the expansion cylinder is installed in temperature control bottom of the case portion, the inflation of expansion cylinder is filled with expanding medium, be equipped with the piston chamber in the expansion cylinder, piston sliding connection is in the piston intracavity, the valve rod is installed in the piston along the horizontal direction and is deviated from expanding medium one side, the halfpace ejector pad is installed and is kept away from piston one end and inclined plane top and current-limiting plate inconsistent at the valve rod.

Through adopting above-mentioned technical scheme, water in the water circulation bad mechanism is along with going on constantly of heat exchange, and the temperature constantly risees, and the expansion medium in the expansion cylinder of setting is heated and takes place the inflation, promotes the piston motion, and then drives the step ejector pad and slide for the current-limiting plate that is inconsistent with step ejector pad inclined plane is by the lifting gradually, thereby realizes going up and down the purpose of controlling discharge according to temperature drive current-limiting plate.

Optionally, the flow limiting plate comprises a flow limiting area and a flow passing area, the flow limiting area is located above the limiting plate and is evenly provided with a plurality of flow slowing holes, the flow passing area is located below the limiting plate and is provided with flow passing holes with the radius larger than that of the refrigerant inlet, sliding blocks are mounted in the middle of two sides of the flow limiting plate, and sliding grooves for the sliding blocks to be slidably inserted and the length of the sliding grooves is consistent with that of the refrigerant inlet are vertically formed in the temperature control box close to two sides of the refrigerant inlet.

Through adopting above-mentioned technical scheme, the discharge that the slow flow hole that sets up has set for the minimums for in the heat exchanger, has guaranteed the continuous circulation of heat exchanger internal water, and the through-flow hole that sets up can increase gradually the coincidence area of through-flow hole and refrigerant import when the restrictor plate is lifted to the realization is to discharge's control.

Optionally, an inclined surface is arranged at one side, facing the step pushing block, of the bottom of the current limiting plate.

Through adopting above-mentioned technical scheme, the inclined plane that sets up is not resisted after preliminary and current-limiting plate bottom contact of halfpace ejector pad, has increased the possibility that current-limiting plate is lifted.

Optionally, a buffer area is arranged on one side, away from the expansion cylinder, of the temperature control box, a partition plate is arranged in the middle of the temperature control box, and a water through hole is formed in the partition plate.

Through adopting above-mentioned technical scheme, the spacer plate part that sets up can support and block rivers and make rivers take place the backward flow to make rivers can carry out the heat transfer and fuse with the rivers of other temperatures, tentatively guaranteed the constancy of temperature of rivers.

Optionally, a motor is installed at a position, close to the outer wall of the top of the buffer area, of the temperature control box, and a stirring paddle is fixedly connected to an output shaft of the motor.

Through adopting above-mentioned technical scheme, starter motor can drive the output shaft and rotate and so that the stirring rake takes place to rotate, and the temperature of intensive mixing temperature control incasement is further guaranteed to rivers invariable.

Optionally, a reducer is arranged on the output shaft of the motor.

Through adopting above-mentioned technical scheme, the reduction gear of setting can slow down the slew velocity of output shaft to slow down the slew velocity of stirring rake, reduce the stirring too fast influence the condition emergence of rivers flow direction on the contrary.

Optionally, collecting plates inclined from the refrigerant inlet to the refrigerant outlet are mounted on two sides of the heat medium pipe in the heat exchanger.

Through adopting above-mentioned technical scheme, the current collecting plate that sets up has the effect of catchmenting rivers for rivers collect to flow around the heat medium pipe, reinforcing heat exchange effect.

In summary, the present application includes at least one of the following beneficial technical effects:

the drive assembly who sets up can drive the restriction plate and go up and down according to the temperature that flows into in the temperature control case to the area of coincidence of increase discharge orifice and refrigerant import realizes the control to heat exchanger refrigerant import discharge, makes heat exchanger also can keep heat exchange efficiency balanced under the change of different temperatures, guarantees that refrigeration effect output is stable.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

FIG. 2 is an overall cross-sectional schematic view of an embodiment of the present application.

Fig. 3 is a schematic structural view of a flow restrictor part in an embodiment of the present application.

Description of reference numerals: 1. a heat exchanger; 1a, a refrigerant inlet; 1b, a refrigerant outlet; 2. a water circulation mechanism; 20. a water return pipe; 21. a water outlet pipe; 3. a heat medium pipe; 30. a buffer area; 31. a partition plate; 32. a water through hole; 3a, a heat medium inlet; 3b, a heat medium outlet; 4. a temperature control box; 5. an expansion cylinder; 50. a piston; 51. a valve stem; 52. a step push block; 53. a piston cavity; 6. a restrictor plate; 60. a flow limiting area; 61. a flow area; 62. a flow-slowing hole; 63. a through-flow aperture; 64. a slider; 65. a sliding groove; 7. a motor; 70. a stirring paddle; 71. a speed reducer; 8. a collector plate; 9. and (4) a water circulating pump.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a heat recovery system for a refrigeration house. Referring to fig. 1 and 2, the heat recovery system includes a heat exchanger 1, a water circulation mechanism 2, a water return pipe 20, a water outlet pipe 21, a heat medium pipe 3, and a temperature control box 4. Wherein, the heat exchanger 1 is arranged between the compressor and the condenser, specifically, the heat medium pipe 3 is arranged in the heat exchanger 1, in this embodiment, the heat medium pipe 3 is arranged in a spiral shape, two ends of the heat medium pipe 3 are respectively provided with a heat medium inlet 3a and a heat medium outlet 3b, wherein, the heat medium inlet 3a is communicated with the output end of the compressor, the heat medium outlet 3b is communicated with the input end of the condenser, two ends of the heat exchanger 1 are also provided with a refrigerant inlet 1a and a refrigerant outlet 1b, wherein, the temperature control box 4 is communicated with the refrigerant inlet 1a, meanwhile, a water outlet pipe 21 is communicated with one end of the temperature control box 4 far away from the refrigerant inlet 1a, the other end of the water outlet pipe 21 is communicated with the output end of the water circulation mechanism 2, in addition, a water return pipe 20 is communicated with the refrigerant outlet 1b of the heat exchanger 1, one end of the water return pipe 20 far away from the heat exchanger 1 is communicated with the input end of the water circulation mechanism 2, wherein, the water return pipe 20 is provided with a circulating water pump 9, under the pressure action of the circulating water pump 9, after the water in the water circulation mechanism 2 flows into the temperature control box 4 from the water outlet pipe 21, and after the heat transfer is carried out between the heat exchanger 1 and the refrigerant in the heat medium pipe 3, the water flow flows back into the water circulation mechanism 2 from the water return pipe 20 again, and the primary heat recovery process is completed.

Referring to fig. 1 and 2, in the present embodiment, a flow restriction plate 6 is slidably connected to an inner side wall of the temperature control box 4 close to the refrigerant inlet 1a, wherein the flow restriction plate 6 includes a flow restriction area 60 and a flow area 61, specifically, the flow restriction area 60 is located above the flow restriction plate 6, a plurality of slow flow holes 62 are uniformly formed in the flow restriction plate 6 located at the flow restriction area 60, a radius of the slow flow holes 62 is smaller than a radius of the refrigerant inlet 1a, the slow flow holes 62 are arranged to reduce a situation that the flow restriction area 60 completely blocks the refrigerant inlet 1a, a minimum value is set for a water flow rate of the water circulation mechanism 2, meanwhile, the flow area 61 is located below the flow restriction plate 6, a flow hole 63 is formed in the flow restriction plate 6 located at the flow area 61, and a radius of the flow hole 63 is larger than a radius of the refrigerant inlet 1 a.

In addition, referring to fig. 3, the sliding blocks 64 are installed in the middle of two sides of the restrictor plate 6, sliding grooves 65 are vertically formed in two sides of the temperature control box 4 close to the refrigerant inlet 1a, the sliding grooves 65 allow the sliding blocks 64 to slidably penetrate, and the length of the sliding grooves 65 is consistent with the width of the refrigerant inlet 1 a.

Referring to fig. 2, in order to control the water flow by driving the restrictor plate 6 to ascend and descend according to the water temperature, a driving assembly is provided at the bottom of the temperature control box 4. In this embodiment, the driving assembly includes an expansion cylinder 5, a piston 50, a valve rod 51 and a step pushing block 52, wherein the expansion cylinder 5 is installed on one side of the temperature control box 4 close to the bottom of the refrigerant inlet 1a, the expansion cylinder 5 is filled with an expansion medium, and one end of the expansion cylinder 5 far away from the expansion medium is provided with a piston 50 cavity, the piston 50 is slidably connected in the piston 50 cavity, the valve rod 51 is installed on one side of the piston 50 far away from the expansion medium along the horizontal direction, the step pushing block 52 is installed on one end of the valve rod 51 far away from the piston 50, the inclined surface of the step pushing block 52 is abutted against the bottom of the current limiting plate 6, the thickness of the current limiting plate 6 is larger than that of the step pushing block 52, and when the top of the step pushing block 52 is abutted against the bottom of the current limiting plate 6, the through hole 63 of the step completely coincides with the refrigerant inlet 1 a.

Referring to fig. 2, the expansion medium may be gas or liquid, and according to the characteristic of volumetric expansion of heat absorption of gas or liquid, the volume of the expansion medium may expand along with the change of the water temperature, so as to push the piston 50 to horizontally slide toward the refrigerant inlet 1a, and further to gradually lift the flow restriction plate 6 by the step push block 52, thereby increasing the overlapping area of the flow opening and the refrigerant inlet 1a, and realizing the control of the water flow rate according to the temperature.

In addition, referring to fig. 2, an inclined surface is provided at the bottom of the choke plate 6 toward the landing push block 52, so that the landing push block 52 can lift the choke plate 6.

Referring to fig. 2, in the present embodiment, a buffer area 30 is provided on a side of the temperature control box 4 away from the expansion cylinder 5, the buffer area 30 is separated spatially by installing a partition plate 31 in the middle of the temperature control box 4, meanwhile, a water through hole 32 is provided in the partition plate 31, the area of the water through hole 32 is larger than the area of the refrigerant inlet 1a, and the buffer area 30 is capable of buffering and fusing water flow, so that the temperature of the water flow entering the temperature control box 4 is kept constant primarily.

Referring to fig. 2, in addition, a motor 7 is installed at a position, close to the outer wall of the top of the buffer area 30, of the temperature control box 4, a stirring paddle 70 is fixedly connected to an output shaft of the motor 7, the motor 7 is started to drive the output shaft to rotate, so that the stirring paddle 70 rotates, meanwhile, a speed reducer 71 is installed on the output shaft of the motor 7, the rotating speed of the output shaft of the motor 7 can be reduced, and the temperature of water flow in the temperature control box 4 is further kept uniform sufficiently under the condition that the transmission is not influenced by the disturbed water flow.

Referring to fig. 2, in the heat exchanger 1, collecting plates 8 are installed at both sides of the heat medium pipe 3, and the collecting plates 8 are inclined from the refrigerant inlet 1a toward the refrigerant outlet 1b, so that the water flow can be further brought into contact with the collecting plates 8, thereby enhancing the heat transfer effect.

The working principle is as follows:

in the process that water flow in the water circulation mechanism 2 flows from the water outlet pipe 21 to the heat medium pipe 3, the water flow enters the buffer area 30 through the temperature control box 4, the space is enlarged and the partition plate 31 is partially blocked, the water flow can generate certain backflow to the refrigerant pipe, so that heat transfer is carried out between the water flow and other temperature water in the buffer area 30 to reach a more balanced temperature, meanwhile, the motor 7 drives the stirring paddle 70 to rotate to further balance the water temperature, along with continuous circulation of the water flow, after the water temperature gradually rises, the water flow in the heat exchanger 1 needs to be increased to accelerate the heat transfer effect, the expansion cylinder 5 is heated by the driving piston 50 to push the step push block 52 to slide towards the refrigerant inlet 1a, so that the flow limiting plate 6 is lifted to increase the overlapping area of the flow opening and the refrigerant inlet 1a, and the water flow is increased.

When the water temperature reaches the preset discharge value of the water circulation mechanism 2, a valve of a water pumping pipe is opened in the water circulation mechanism 2 to form temporary agent circulation with the water in the water storage tank and an overflow pipe, the water temperature gradually and suddenly drops after entering the temperature control box 4 and fusing with the stirring paddles 70 in the buffer area 30, so that the expansion cylinder 5 contracts when cooled, the driving piston 50 drives the step pushing block 52 to slide away from the refrigerant inlet 1a, the height of the flow limiting plate 6 is reduced, the overlapping area of the flow opening and the refrigerant inlet 1a is reduced, the water flow is reduced, the water temperature in the heat exchanger 1 is kept in a constant state, and the balance of the heat transfer effect is ensured.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A heat recovery system for a cold store, characterized in that: comprises a heat exchanger (1), a water circulation mechanism (2), a water return pipe (20), a water outlet pipe (21), a heat medium pipe (3) and a temperature control box (4), the heat medium pipe (3) is arranged in the heat exchanger (1) and is communicated with the condenser and the compressor, the two ends of the heat exchanger (1) are provided with a refrigerant inlet (1 a) and a refrigerant outlet (1 b), the temperature control box (4) is communicated with the refrigerant inlet (1 a), one end of the water outlet pipe (21) is communicated with the temperature control box (4) and the other end is communicated with the output end of the water circulation mechanism (2), one end of the water return pipe (20) is communicated with the refrigerant outlet (1 b) and the other end is communicated with the input end of the water circulation mechanism (2), a flow limiting plate (6) is connected on the inner side wall of the temperature control box (4) close to the refrigerant inlet (1 a) in a sliding way, and a driving component for driving the flow limiting plate (6) to ascend and descend according to the temperature is arranged at the bottom of the temperature control box (4).

2. A heat recovery system for a cold store according to claim 1, wherein: drive assembly includes expansion cylinder (5), piston (50), valve rod (51) and halfpace ejector pad (52), install in temperature control box (4) bottom expansion cylinder (5), the intussuseption of expansion cylinder (5) is filled with expanding medium, be equipped with piston chamber (53) in expansion cylinder (5), piston (50) sliding connection is in piston chamber (53), install in piston (50) along the horizontal direction and deviate from expanding medium one side, halfpace ejector pad (52) are installed and are kept away from piston (50) one end and inclined plane top and current-limiting plate (6) inconsistent in valve rod (51).

3. A heat recovery system for a cold store according to claim 1, wherein: the flow limiting plate (6) comprises a flow limiting area (60) and a flow area (61), the flow limiting area (60) is located above the flow limiting plate (6) and is uniformly provided with a plurality of flow buffering holes (62), the flow area (61) is located below the flow limiting plate (6) and is provided with flow holes (63) with the radius larger than that of a refrigerant inlet (1 a), sliding blocks (64) are installed in the middle of two sides of the flow limiting plate (6), and a sliding groove (65) which is used for sliding and inserting of the sliding blocks (64) and is consistent in length and width of the refrigerant inlet (1 a) is vertically formed in the temperature control box (4) close to two sides of the refrigerant inlet (1 a).

4. A heat recovery system for a cold store according to claim 2, wherein: an inclined surface is arranged at one side of the bottom of the current limiting plate (6) facing the step pushing block (52).

5. A heat recovery system for a cold store according to claim 1, wherein: one side, far away from the expansion cylinder (5), of the temperature control box (4) is provided with a buffer area (30), the middle of the temperature control box (4) is provided with a partition plate (31), and a water through hole (32) is formed in the partition plate (31).

6. The heat recovery system for a cold store according to claim 5, wherein: the temperature control box (4) is close to the outer wall of the top of the buffer area (30) and is provided with a motor (7), and an output shaft of the motor (7) is fixedly connected with a stirring paddle (70).

7. The heat recovery system for a cold store according to claim 6, wherein: and a speed reducer (71) is arranged on an output shaft of the motor (7).

8. A heat recovery system for a cold store according to claim 1, wherein: and collecting plates (8) which are inclined from a refrigerant inlet (1 a) to a refrigerant outlet (1 b) are arranged on two sides of the heat medium pipe (3) in the heat exchanger (1).