CN114576916A

CN114576916A - Industrial refrigerator evaporator coil defrosting device

Info

Publication number: CN114576916A
Application number: CN202210222723.0A
Authority: CN
Inventors: 陈崇
Original assignee: Individual
Current assignee: Hefei Shengming Precision Manufacturing Co ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-06-03
Anticipated expiration: 2042-03-09
Also published as: CN114576916B

Abstract

The invention relates to the technical field of light industrial appliance manufacturing, and discloses an industrial refrigerator evaporator coil defrosting device which comprises an evaporator coil, wherein the top and the bottom of a support penetrate through the support, ventilation holes which are symmetrical in pairs are formed in the top and the bottom of the support, electric heating wires are fixedly sleeved in the ventilation holes in the top, an electric control valve is fixedly sleeved at one end of each ventilation hole in the top, one end of each ventilation hole is fixedly connected with an air supply pipe, and movable grooves are formed in one end of the top and one end of the bottom of the support. According to the invention, in the defrosting link of the refrigerator, high-pressure airflow can flow through the ventilation holes through the air supply pipe and enter the heating pipe after being heated by the influence of the heating wire in the defrosting link of the refrigerator through the designed heating wire, so that the high-pressure airflow heats and melts frost on the outer side of the heating pipe, the heat directly acts on the frost and ice from inside to outside, and the problem of rapid temperature rise in the refrigerator caused by heat dissipation to other directions in the refrigerator due to the external heating pipe is avoided.

Description

Industrial refrigerator evaporator coil defrosting device

Technical Field

The invention relates to the technical field of light industrial appliance manufacturing, in particular to a defrosting device for an evaporator coil of an industrial refrigerator.

Background

The industrial refrigerator is a device for refrigerating by adopting a circulating refrigeration technology in the manufacture of light industrial appliances, and the main working principle is that a gas-state high-temperature low-pressure refrigerant is compressed into a gas-state high-temperature high-pressure refrigerant by a compressor, the gas-state high-temperature high-pressure refrigerant is formed after passing through a heat exchange device, then the liquid-state high-temperature high-pressure refrigerant flows through a throttling device (such as a capillary tube), the pressure of the liquid-state high-temperature high-pressure refrigerant is reduced and evaporated, a gas-liquid two-phase low-temperature low-pressure refrigerant is formed, then the gas-liquid two-phase low-temperature low-pressure refrigerant exchanges heat with the inside of an evaporator of the refrigerator in a coil pipe, the heat in the refrigerator is taken away, the gas-liquid two-phase refrigerant is continuously evaporated, and then the low-temperature low-pressure refrigerant flows to the compressor for circulation.

In the process of changing the refrigerant, when the gas-liquid two-phase low-temperature low-pressure refrigerant in the evaporator coil leaves the refrigerator and flows to the compressor, the content of the liquid refrigerant in the gas-liquid two-phase is often too high due to insufficient absorbed heat, so that the compressor receives the liquid refrigerant, the service life of the compressor is reduced, meanwhile, the moisture in the internal circulation gas is influenced by the internal circulation of the gas in the refrigerator and can be contacted with the evaporator coil in the refrigerator, frost and ice are formed on the surface of the evaporator coil, the heat transfer is blocked, and the refrigeration efficiency of the refrigerator is reduced, the conventional refrigerator sets a program, stops the work of the compressor at regular time, adds a heater near the evaporator coil, and enables the heater to heat the evaporator coil for a long time to melt the frost and the ice on the evaporator coil and discharge the frost and the ice from a pipeline arranged at the bottom, but in this way, the contact area of the heater and the interior of the refrigerator is large, the heating time is long so that the temperature of the heater affects the inside of the refrigerator when the heater heats the evaporator coil, so that the temperature of the inside of the refrigerator rapidly rises in a short time.

Disclosure of Invention

The defrosting device of the evaporator coil of the industrial refrigerator has the advantages that a plurality of reducing channels are formed between the gravity block and the evaporator coil, a gas-liquid two-phase refrigerant passes through the reducing channels, the frost ice is further evaporated under the throttling action, the frost ice is condensed on the heating pipe, hot air flows through the heating pipe and directly acts on the frost ice from inside to outside, excessive diffusion of heat cannot occur, the hot air intermittently turns to provide lift force and pressure, the gravity block intermittently impacts the evaporator coil to enable the heating pipe to vibrate and enable loose frost ice to fall off under vibration, and the technical problems that the content of liquid refrigerant is high and the temperature inside the refrigerator is rapidly raised due to the heater caused by insufficient heat absorbed by the gas-liquid two-phase refrigerant in the background technology are solved.

The invention provides the following technical scheme: the utility model provides an industry refrigerator evaporator coil defroster, runs through the evaporator coil of support including support top and bottom, the ventilation hole of two bisymmetry is seted up to the top and the bottom of support, the top the heating wire has been cup jointed to the ventilation hole internal fixation, the top the one end in ventilation hole is fixed the cup joint and is had the automatically controlled valve, the one end fixedly connected with blast pipe in ventilation hole, the activity groove has been seted up to the top and the bottom one end of support, the heating pipe has been cup jointed in the outside activity of evaporator coil, the both ends outside fixedly connected with spacing ring of heating pipe, the spacing ring activity is cup jointed in the activity groove, the inner chamber middle part fixedly connected with of heating pipe cuts off the layer, the heating pipe has used the partition layer to divide into hot-air channel I of evaporator coil upside and hot-air channel II of evaporator coil downside as the center, the top fixedly connected with of hot-air channel I is the gravity piece of equipartition, the gravity block penetrates through the top of the evaporator coil to the inner cavity of the evaporator coil, the bottom of the hot air channel II is fixedly connected with a spring, the top end of the spring is fixedly connected with the bottom of the outer side of the evaporator coil, the inner cavity turning part of the heating pipe is fixedly connected with a reversing disc, and a first air channel and a second air channel are formed in the reversing disc.

Preferably, the electric heating wire and the electric control valve are controlled by a control program, the air supply pipe at the top is communicated with the high-pressure fan, the air supply pipe at the bottom is communicated with the outside, and the high-pressure fan is controlled by the control program.

Preferably, the top opening of the evaporator coil is in communication with a capillary tube and the bottom opening of the evaporator coil is in communication with a compressor.

Preferably, evaporimeter coil and heating pipe are the rectangular pipe, cut off the in situ and be equipped with sealing layer I, cut off the inboard on layer and the outside wall looks adaptation of evaporimeter coil.

Preferably, the hot air channel I is communicated with upper side ventilation holes in the top and the bottom of the support, and the hot air channel II is communicated with lower side ventilation holes in the top and the bottom of the support.

Preferably, the sealing layer II is arranged on the outer side of the top of the gravity block, the bottom of the gravity block is arc-shaped, and relatively high points at two ends of the arc-shaped block are opposite to the flowing direction of the airflow.

Preferably, the inner side of the reversing disc is matched with the evaporator coil, the reversing disc and the evaporator coil are movably sleeved and are subjected to sealing treatment, openings on two sides of the first air channel are communicated with the upper side space of the evaporator coil, and openings on two sides of the second air channel are communicated with the lower side space of the evaporator coil.

The invention has the following beneficial effects:

1. the invention forms the reducing channel between the bottom of the gravity block and the bottom of the inner cavity of the evaporator coil through the designed gravity block and the evaporator coil, so that when gas-liquid two-phase refrigerant flows through the reducing channel, the pressure is further reduced and the refrigerant is evaporated under the influence of throttling, the temperature is further reduced, the total vapor amount of the gas-liquid two-phase refrigerant is further increased, the cooling effect is enhanced, and the problem of short service life of the compressor caused by overlarge content of liquid refrigerant when the gas-liquid two-phase refrigerant flows to the compressor through the evaporator is avoided.

2. According to the invention, in the defrosting link of the refrigerator, high-pressure airflow can flow through the ventilation holes through the air supply pipe and enter the heating pipe after being heated by the influence of the heating wire in the defrosting link of the refrigerator through the designed heating wire, so that the high-pressure airflow heats and melts frost on the outer side of the heating pipe, the heat directly acts on the frost and ice from inside to outside, and the problem of rapid temperature rise in the refrigerator caused by heat dissipation to other directions in the refrigerator due to the external heating pipe is avoided.

3. The invention can intermittently open and close two electric control valves through the designed electric control valve, the hot air channel I, the hot air channel II, the gravity block and the spring, so that high-pressure hot air intermittently and independently enters the hot air channel I and the hot air channel II, when the high-pressure hot air flow enters the hot air channel I, the high-pressure hot air flow exerts upward lifting force on the heating pipe, so that the heating pipe is lifted upwards, the spring compresses the stored force to provide enough fall for the gravity block, when the high-pressure hot air flow enters the hot air channel II, the high-pressure hot air flow applies downward pressure to the heating pipe, the heating pipe falls down by matching with the force-storing spring and the gravity block with fall, the gravity block intermittently impacts the evaporator coil through the actions, therefore, the evaporator coil vibrates and transmits the vibration to the heating pipe, so that frost and ice which are heated and loosened on the outer side of the heating pipe are quickly separated, and the aim of quickly defrosting is fulfilled.

4. According to the invention, through the designed reversing disc, the high-pressure hot air entering the hot air channel I can pass through the first air channel on the reversing disc, after the evaporator coil and the heating pipe are turned, the high-pressure hot air still is positioned at the upper side of the evaporator coil to provide lifting force, so that the high-pressure hot air entering the hot air channel II can pass through the second air channel on the reversing disc, after the evaporator coil and the heating pipe are turned, the high-pressure hot air still is positioned at the lower side of the evaporator coil to provide pressure, the problem that the lifting force and the pressure are offset due to the fact that the direction of the high-pressure hot air is also changed after the evaporator coil and the heating pipe are turned is solved, and the guarantee of the pressure direction of the high-pressure hot air is provided for the intermittent motion of the gravity block.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of the structure A of FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of a portion of the structure shown at B in FIG. 1 according to the present invention;

FIG. 4 is a schematic view of a heating tube according to the present invention;

FIG. 5 is a schematic view of the structure of the diverter plate of the present invention;

FIG. 6 is a schematic view of the heating pipe of the present invention in a pressed state.

In the figure: 1. a support; 2. a vent hole; 3. an electric heating wire; 4. an electrically controlled valve; 5. a movable groove; 6. an air supply pipe; 7. an evaporator coil; 8. heating a tube; 9. a limiting ring; 10. a partition layer; 101. a sealing layer I; 11. a hot air channel I; 12. a hot air channel II; 13. a gravity block; 131. a sealing layer II; 14. a spring; 15. a reversing disc; 16. a first air duct; 17. and a second air duct.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2 and 6, a defrosting device for an evaporator coil of an industrial refrigerator comprises a bracket 1, an evaporator coil 7 with the top and the bottom penetrating through the bracket 1, vent holes 2 with two-to-two symmetry are formed in the top and the bottom of the bracket 1, an electric heating wire 3 is fixedly sleeved in the vent hole 2 at the top, an electric control valve 4 is fixedly sleeved at one end of the vent hole 2 at the top, the electric heating wire 3 and the electric control valve 4 are controlled by a program, an air supply pipe 6 is fixedly connected to one end of the vent hole 2, the air supply pipe 6 at the top is communicated with a high pressure fan, the air supply pipe 6 at the bottom is communicated with the outside, the high pressure fan is controlled by the program, when the defrosting device is started at a set defrosting time, the high pressure fan starts to deliver high pressure air to the air supply pipe 6 at the top of the bracket 1, the electric heating wire 3 starts to be electrified and is heated, and then the two electric control valves 4 are intermittently opened and closed at the set time under the program control, the high-pressure airflow intermittently passes through the two electric control valves 4, enters the vent holes 2, blows the heating wires 3 in the vent holes to be heated, enters the heating pipes 8 to be defrosted and deiced to be heated and melted, and is finally discharged from the blast pipe 6 at the bottom to form airflow circulation, and the top end and the bottom end of the support 1 are provided with movable grooves 5.

Referring to fig. 1-2 and 4-6, the top opening of the evaporator coil 7 is connected with the capillary tube, the bottom opening of the evaporator coil 7 is connected with the compressor, the heating pipe 8 is movably sleeved outside the evaporator coil 7, the limiting rings 9 are fixedly connected to the outer sides of the two ends of the heating pipe 8, the limiting rings 9 are movably sleeved in the movable groove 5, so that the movable groove 5 limits the displacement of the limiting rings 9, the heating pipe 8 can be influenced by the movable groove 5 during intermittent up-and-down movement, the inner wall of the heating pipe 8 can not be attached to the outer wall of the evaporator coil 7 all the time, the problem that the heating pipe 8 can not be lifted up and down intermittently due to no space for subsequently input high-pressure hot air flow after attachment is avoided, the evaporator coil 7 and the heating pipe 8 are rectangular pipes, and the middle part of the inner cavity of the heating pipe 8 is fixedly connected with the partition layer 10, the inside of the partition layer 10 is provided with a sealing layer I101, the inside of the partition layer 10 is matched with the outer side wall of the evaporator coil 7 to avoid gas leakage, the heating pipe 8 is divided into a hot air channel I11 at the upper side of the evaporator coil 7 and a hot air channel II 12 at the lower side of the evaporator coil 7 by taking the partition layer 10 as the center, the hot air channel I11 is communicated with the upper side vent holes 2 at the top and the bottom of the bracket 1, the hot air channel II 12 is communicated with the lower side vent holes 2 at the top and the bottom of the bracket 1, when the high-pressure hot air intermittently enters the hot air channel I11, the pressure of the high-pressure hot air is higher, the provided force is enough to displace the heating pipe, the high-pressure hot air exerts upward lifting force on the heating pipe 8, the restoring force of the stretched spring 14 is matched to lift the heating pipe 8, the gravity block 13 is lifted, the spring 14 is restored to the normal state, and the force provided by the spring 14 is enough to overcome the friction force under the sealing of the gravity block 13, when high-pressure hot air flows intermittently enter the hot air channel II 12, the high-pressure hot air applies downward pressure to the heating pipe 8, the heating pipe 8 is pressed downwards by matching with the gravity of the gravity block 13, the spring 14 stretches to store force, the gravity block 13 impacts the evaporator coil 7 to vibrate the evaporator coil 7 and transmit the vibration to the heating pipe 8, frost and ice melted and loosened on the outer side of the heating pipe 8 are vibrated to fall off, and the defrosting and ice removing speed is accelerated.

Referring to fig. 1, 4-6, the top end of the hot air channel i 11 is fixedly connected with a uniformly distributed gravity block 13, the top outer side of the gravity block 13 is provided with a sealing layer ii 131 to avoid leakage, the gravity block 13 penetrates through the top of the evaporator coil 7 to the inner cavity thereof, the bottom of the gravity block 13 is arc-shaped, the relatively high points at the two ends of the arc-shaped are opposite to the flowing direction of the air flow, so that the gas-liquid two-phase coolant flows in the evaporator coil 7, the gas-liquid two-phase coolant can flow from the relatively high points of the arc-shaped to the relatively low points of the arc-shaped, at this time, the bottom of the gravity block 13 and the bottom of the inner cavity of the evaporator coil 7 form a variable diameter channel, so that the flowing gas-liquid two-phase refrigerant is evaporated again, the vapor content is increased, the liquid content is reduced, the cooling effect is enhanced, and the problem that the service life of the compressor is short due to the overlarge liquid refrigerant content when the gas-liquid two phases flow to the compressor through the evaporator is avoided, the bottom end of the hot air channel II 12 is fixedly connected with a spring 14, and the top end of the spring 14 is fixedly connected with the outer bottom end of the evaporator coil 7.

Referring to fig. 1, 3, 5-6, a reversing disc 15 is fixedly connected to the inner cavity turn of the heating pipe 8, the inner side of the reversing disc 15 is matched with the evaporator coil 7, the two are movably sleeved and sealed, a first air duct 16 and a second air duct 17 are arranged in the reversing disc 15, two side openings of the first air duct 16 are communicated with the upper side space of the evaporator coil 7, two side openings of the second air duct 17 are communicated with the lower side space of the evaporator coil 7, so that when high-pressure hot air in the hot air passage i 11 flows to the turn, the high-pressure hot air flows to the hot air passage i 11 still positioned above the evaporator coil 7 through the first air duct 16 on the reversing disc 15, so that the high-pressure hot air still positioned above the evaporator coil 7 provides lifting force, when the high-pressure hot air in the hot air passage ii 12 flows to the turn, the high-pressure hot air still positioned below the evaporator coil 7 through the second air duct 17 on the reversing disc 15, so that the high-pressure hot air flow is still positioned at the lower side of the evaporator coil 7 to provide pressure, the problem that the direction of the high-pressure hot air flow is also changed after the evaporator coil 7 and the heating pipe 8 are turned, so that the lift force and the pressure are counteracted, and the pressure direction of the high-pressure hot air flow is ensured for the intermittent movement of the gravity block 13.

The use method (working principle) of the invention is as follows:

firstly, when the programmed defrosting time of the refrigerator is up, the compressor stops working, at the same time, the spring 14 is in a normal state, the gravity block 13 can not impact the evaporator coil 7, then the high-pressure fan starts to convey high-pressure airflow to the air supply pipe 6 at the top of the bracket 1, the electric heating wires 3 start to be electrified and heated, then the two electric control valves 4 are intermittently opened and closed according to the set time under the program control, so that the high-pressure airflow intermittently passes through the two electric control valves 4, when the upper electric control valve 4 is opened and the lower electric control valve 4 is closed, the high-pressure airflow enters the upper vent hole 2, so that the high-pressure airflow blows through the electric heating wires 3 in the high-pressure airflow to be heated, high-pressure airflow enters the hot air channel I11, the high-pressure airflow heats and melts frost and ice on the outer side of the heating pipe 8, the high-pressure airflow applies upward lifting force to the heating pipe 8, the spring 14 is compressed, so that the heating pipe 8 is lifted, the gravity block 13 is lifted upwards, meanwhile, the limiting ring 9 limits the lifting displacement of the heating pipe 8, and when high-pressure hot air flows to a turning part in the hot air channel I11, the high-pressure hot air flows to the hot air channel I11 which is still positioned above the evaporator coil 7 after turning through the first air channel 16 on the reversing disc 15;

then, the lower electric control valve 4 is opened, the upper electric control valve 4 is closed, so that high-pressure air flow enters the lower vent hole 2, the heating wire 3 in the heating pipe is heated by the high-pressure air flow to form high-pressure hot air flow, the high-pressure hot air flow enters the hot air channel II 12, the frost and ice on the outer side of the heating pipe 8 are heated and melted by the high-pressure hot air flow, the high-pressure hot air flow applies downward pressure to the heating pipe 8, the heating pipe 8 is quickly pressed down by matching the gravity of the gravity block 13 and the restoring force of the compression spring 14, the spring 14 is stretched at the moment, the gravity block 13 impacts the evaporator coil 7, the impact force is larger at the moment, the evaporator coil 7 is vibrated and larger in vibration amplitude, the vibration is transmitted to the heating pipe 8, the frost and ice loosened on the outer side of the heating pipe 8 are vibrated to fall off, and when the high-pressure hot air flow flows to a turning position in the hot air channel II 12, the hot air flow still lies below the evaporator coil 7 after flowing to the turning through the second air channel 17 on the reversing disc 15 (ii) a

Finally, the two electric control valves 4 are intermittently opened and closed under the control of a program, so that the gravity block 13 intermittently impacts the evaporator coil 7, the heating pipe 8 is intermittently lifted and pressed down and intermittently vibrates to complete defrosting, at the moment, melted frost, ice and fallen frost and ice fall to a downward pipeline to be discharged, when the set defrosting time is up, the defrosting device stops running, the high-pressure fan does not convey high-pressure airflow, the electric control valves 4 are not intermittently opened and closed, the electric heating wire 3 is closed, then, the compressor is started again, the gas-liquid two-phase coolant flows in the evaporator coil 7 again, the restoring force of the stretched or compressed spring 14 is matched with the gravity of the gravity block 13 to reset the gravity block 13, the bottom of the gravity block 13 and the bottom of the inner cavity of the evaporator coil 7 form a variable-diameter channel, the flowing gas-liquid two-phase refrigerant is evaporated again, the steam content is improved, and the liquid content is reduced, and finally, enabling the gas-liquid two-phase refrigerant to exchange heat with the interior of the refrigerator through the evaporator coil 7 and the heating pipe 8 for refrigeration.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An industrial refrigerator evaporator coil defroster, includes that support (1) top and bottom run through evaporator coil (7) of support (1), its characterized in that: the top and the bottom of support (1) have been seted up ventilation hole (2) of two bisymmetry, the top ventilation hole (2) internal fixation cover has been connect heating wire (3), the top the one end fixation cover in ventilation hole (2) has been connect automatically controlled valve (4), the one end fixedly connected with blast pipe (6) in ventilation hole (2), movable groove (5) have been seted up to the top and bottom one end of support (1), heating pipe (8) have been cup jointed in the outside activity of evaporimeter coil (7), the both ends outside fixedly connected with spacing ring (9) of heating pipe (8), spacing ring (9) activity is cup jointed in movable groove (5), the inner chamber middle part fixedly connected with of heating pipe (8) cuts off layer (10), heating pipe (8) have been divided into hot-air channel I (11) and the hot-air channel II (12) of evaporimeter coil (7) downside for the center with cutting off layer (10), the gravity piece (13) of the top fixedly connected with equipartition of hot air channel I (11), the top that evaporimeter coil (7) were run through in gravity piece (13) to its inner chamber, the bottom fixedly connected with spring (14) of hot air channel II (12), the top of spring (14) and the outside bottom fixed connection of evaporimeter coil (7), the inner chamber of heating pipe (8) turn fixedly connected with switching-over dish (15), first wind channel (16) and second wind channel (17) have been seted up in switching-over dish (15).

2. The industrial refrigerator evaporator coil defroster of claim 1 further characterized by: the electric heating wire (3) and the electric control valve (4) are controlled by a control program, the air supply pipe (6) at the top is communicated with the high-pressure fan, the air supply pipe (6) at the bottom is communicated with the outside, and the high-pressure fan is controlled by the control program.

3. The industrial refrigerator evaporator coil defrosting apparatus of claim 1 wherein: the top end opening of the evaporator coil (7) is communicated with the capillary tube, and the bottom end opening of the evaporator coil (7) is communicated with the compressor.

4. The industrial refrigerator evaporator coil defrosting apparatus of claim 1 wherein: evaporimeter coil (7) and heating pipe (8) are the rectangular pipe, it is equipped with sealing layer I (101) in layer (10) to cut off, cut off the inboard of layer (10) and the outside wall of evaporimeter coil (7) looks adaptation.

5. The industrial refrigerator evaporator coil defrosting apparatus of claim 1 wherein: the hot air channel I (11) is communicated with the upper side ventilation hole (2) at the top and the bottom of the support (1), and the hot air channel II (12) is communicated with the lower side ventilation hole (2) at the top and the bottom of the support (1).

6. The industrial refrigerator evaporator coil defrosting apparatus of claim 1 wherein: the top outside of gravity piece (13) is equipped with sealing layer II (131), the bottom of gravity piece (13) is the arc, and the relative high point at arc both ends is just to the flow direction of air current.

7. The industrial refrigerator evaporator coil defrosting apparatus of claim 1 wherein: the inboard and the evaporimeter coil (7) looks adaptation of switching-over dish (15), the two activity cup joints, and through sealing process, the both sides opening intercommunication evaporimeter coil (7) of first wind channel (16) upside space, the both sides opening intercommunication evaporimeter coil (7) of second wind channel (17) downside space.