Novel ultralow-temperature air cooler for double-loop cascade system with precooling function

Abstract

The novel ultralow-temperature air cooler with the precooling function for the double-loop cascade system comprises a shell, mesh enclosure fans are symmetrically fixed to the front surface of the shell along the vertical center line, a first loop coil pipe and a second loop coil pipe are arranged in the shell, and the second loop coil pipe and the first loop coil pipe are designed side by side in the front-back direction. The first loop coil pipe and the second loop coil pipe each comprise a plurality of sets of refrigerating coil pipes, a plurality of refrigerating coil pipes are stacked in each set in the vertical direction, each refrigerating coil pipe extends in the horizontal direction, a water storage disc is connected to the lower portion of the shell, and a copper pipe fin heat exchanger is arranged in the water storage disc. The two independent loop coil pipes are matched with each other, the first loop coil pipe is used when the temperature of the refrigeration house is higher than zero DEG C in the initial cooling stage, the second loop coil pipe is used when the temperature of the refrigeration house is lower than zero DEG C, and the problems of system overload and instability during operation of a cascade system in the high-temperature stage are solved; the heat exchange effect is enhanced, dead angles are reduced, and the defrosting effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration, in particular to a novel ultra-low temperature cooling fan for a double-circuit cascade system with pre-cooling function. Background Art

[0002] The existing conventional cascade system air cooler is a low-temperature cold air component, which only includes a single circuit (a group of coils with one inlet and one outlet). The circuit uses a low-temperature refrigerant (such as R23) suitable for the binary cascade refrigeration system. The system has the following problems when used in cold storage. During the initial high-temperature operation in the cold storage, the suction pressure of the refrigeration system is high due to the high storage temperature. If the high-temperature stage lasts for a long time, it is easy to cause the compressor to overload and operate at high temperature, resulting in compressor overload or poor lubrication failure and damage. Utility Model Content

[0003] The utility model aims to provide a novel ultra-low temperature cooling fan for a double-circuit cascade system with pre-cooling, which solves the above technical problems.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a novel ultra-low temperature cooling fan for a double-circuit cascade system with pre-cooling, comprising a shell, a mesh fan is symmetrically fixed to the front surface of the shell along the vertical center line, a wire mesh plate is detachably connected to the rear surface of the shell, a left end plate and a right end plate are symmetrically arranged inside the shell, a first circuit coil and a second circuit coil are arranged in parallel with the first circuit coil, wherein the first circuit coil runs with a medium-high temperature refrigerant, and in the initial stage of cooling When the cold storage temperature is above zero degrees, the second circuit coil uses low-temperature refrigerant and is used when the cold storage temperature is below zero degrees. The first circuit coil and the second circuit coil each include several groups of refrigeration coils, and each group of refrigeration coils has multiple refrigeration coils stacked in the vertical direction. Each of the refrigeration coils extends in the horizontal direction and passes through and is fixed to the left end plate and the right end plate. A water storage pan is connected under the outer shell, and an opening is provided at the bottom of the outer shell. The outer shell is connected to the water storage pan through the opening, and a copper tube fin heat exchanger is arranged in the water storage pan.

[0005] Optionally, the refrigeration coil is distributed in a serpentine shape in the horizontal direction.

[0006] Optionally, the water storage tray is surrounded by enclosing edges, the bottom of the water storage tray is inclined, the top of the water storage tray is horizontally arranged, and a drainage outlet is provided at the bottom of the water storage tray near the higher side of the enclosing edge.

[0007] Optionally, the copper tube fin heat exchanger is horizontally fixed between the left and right sides of the water storage tray.

[0008] Optionally, the number of the mesh cover fans is two, and the two mesh cover fans are symmetrically distributed about the vertical center line of the housing.

[0009] Optionally, a partition is provided in the middle of the shell, and the refrigeration coil passes through and is fixed on the partition.

[0010] Optionally, the liquid inlets of the multiple refrigeration coils are gathered into an inlet pipe and then fixed to a side surface of the left end plate, and the exhaust ports of the multiple refrigeration coils are gathered into an air collecting pipe and then fixed to a side surface of the right end plate, and one end of the air collecting pipe is connected to the exhaust pipe.

[0011] Optionally, an electric control box is provided on a side surface of the left end plate away from the right end plate, and the electric control box is provided with a control circuit, electrical components and a main control module for controlling the operation of the mesh fan and the copper tube fin heat exchanger.

[0012] Optionally, the rear surface of the housing is provided with a liquid inlet opening for connecting the outside world with the liquid inlet pipe, and an exhaust opening for connecting the outside world with the exhaust pipe.

[0013] Optionally, the wire mesh plate is made of stainless steel wire.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) The utility model cooperates with each other through two circuit coils designed in parallel front and back. In the initial stage of cooling, the first circuit coil is used when the temperature of the cold storage is higher than zero degrees, and medium-high temperature refrigerant flows in the first circuit coil. When the temperature of the cold storage is lower than zero degrees, the second circuit coil is used, and low temperature refrigerant flows in the second circuit coil. Therefore, in the initial stage of cooling, medium-high temperature refrigerant flows in the first circuit coil, and the ultra-low temperature air cooler can cool the cold storage without too much suction pressure, thereby solving the system overload and instability problems of the cascade system in the high temperature stage.

[0016] (3) The utility model adds a copper tube fin heat exchanger at the bottom of the shell to transfer heat to the water pan for fluorination defrosting. Compared with the original arrangement of copper tubes, the utility model enhances the heat exchange effect, reduces dead corners, and improves the defrosting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 This is one of the three-dimensional views of the ultra-low temperature air cooler in the embodiment of the utility model.

[0019] Figure 2 It is a three-dimensional diagram of the ultra-low temperature cooling fan in another direction in the embodiment of the utility model.

[0020] Figure 3 It is a three-dimensional diagram showing the internal structure of the ultra-low temperature air cooler in the embodiment of the utility model.

[0021] Figure 4 This is a diagram of the internal structure of the ultra-low temperature cooling fan in the embodiment of the present utility model.

[0022] Figure 5 It is a top view of the water storage tray in the embodiment of the utility model.

[0023] In the figure: outer shell 1, left end plate 101, right end plate 102, partition 103, mesh fan 2, wire mesh plate 3, water storage tray 4, first circuit coil 5, second circuit coil 6, refrigeration coil 7, copper tube fin heat exchanger 8, liquid inlet pipe 9, gas collecting pipe 10, exhaust pipe 11, electric control box 12, liquid inlet opening 13, exhaust opening 14, drain outlet 15, opening 16. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the embodiments of the present invention, it should be understood that if there are directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, inside, outside, etc., the directions or positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of describing the embodiments of the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0027] In the embodiments of the present invention, unless otherwise clearly specified and limited, if there are terms such as "installed", "connected", "connected", "fixed", etc., they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0028] like Figures 1 to 5 As shown, the embodiment of the utility model provides a novel ultra-low temperature cold air blower for a double-circuit cascade system with pre-cooling, comprising a shell 1, a mesh fan 2 is symmetrically fixed to the front surface of the shell 1 along the vertical center line, a wire mesh plate 3 is detachably connected to the rear surface of the shell 1, a left end plate 101 and a right end plate 102 are symmetrically arranged inside the shell 1, a first circuit coil 5 and a second circuit coil 6 are arranged in parallel front and back with the first circuit coil 5, wherein the first circuit coil 5 runs a medium-high temperature refrigerant, and the cold storage is in the initial stage of cooling. It is used when the temperature is above zero degrees. The second circuit coil 6 uses low-temperature refrigerant. It is used when the temperature in the cold storage is below zero degrees. The first circuit coil 5 and the second circuit coil 6 each include a plurality of groups of refrigeration coils 7. Each group of refrigeration coils 7 has multiple refrigeration coils stacked in the vertical direction. Each refrigeration coil 7 extends in the horizontal direction and passes through and is fixed to the left end plate 101 and the right end plate 102. A water storage pan 4 is connected to the bottom of the outer shell 1, and an opening 16 is provided at the bottom of the outer shell 1. The outer shell 1 is connected to the water storage pan 4 through the opening 16, and a copper tube fin heat exchanger 8 is provided in the water storage pan 4.

[0029] Specifically, the first circuit coil 5 and the second circuit coil 6 designed in parallel cooperate with each other. In the initial stage of cooling, the first circuit coil 5 is used when the temperature of the cold storage is higher than zero degrees, and the second circuit coil 6 is used when the temperature of the cold storage is lower than zero degrees. The second circuit coil 6 uses low-temperature refrigerant, which solves the system overload and instability problems in the high-temperature stage of the cascade system.

[0030] In this embodiment, if Figure 4 As shown, the refrigeration coil 7 extends in a serpentine shape in the horizontal direction.

[0031] Specifically, the refrigeration coil 7 is arranged in a snake shape to prolong the residence time of the refrigerant in the ultra-low temperature air cooler and improve the cooling effect.

[0032] In this embodiment, if Figures 1 to 3 As shown, the water storage pan 4 is surrounded by an enclosure edge, the bottom of the water storage pan 4 is arranged as an inclined surface, the top of the water storage pan 4 is arranged horizontally, and a drainage outlet 15 is provided at the bottom of the water storage pan 4 near the higher side of the enclosure edge.

[0033] Specifically, the bottom of the water storage pan 4 is set as an inclined surface, and the top of the water storage pan 4 is set horizontally, so that the enclosed edge on one side of the water storage pan 4 is higher than the enclosed edge on the other side, and then a drain port 15 is opened at the bottom of the water storage pan 4 near the higher side of the enclosed edge. According to the inclined surface design of the bottom of the water storage pan 4, the drain port 15 is set to discharge the accumulated water flowing down the refrigeration coil 7 due to the heat.

[0034] In this embodiment, if Figure 5 As shown, the copper tube fin heat exchanger 8 is horizontally fixed between the left and right sides of the water storage pan 4.

[0035] In this embodiment, if Figure 1 As shown, there are two mesh fans 2 , and the two mesh fans 2 are symmetrically distributed about the vertical center line of the housing 1 .

[0036] Specifically, by providing the mesh fan 2, the air in the housing 1 can be blown out, and when the mesh fan 2 rotates, the air circulation can be accelerated, which is convenient for use.

[0037] In this embodiment, if Figure 3 and Figure 4 As shown, a partition 103 is provided in the middle of the housing 1 , and the refrigeration coil 7 passes through and is fixed on the partition 103 .

[0038] Specifically, the partition plate 103 and the left end plate 101 and the right end plate 102 form two cooling inner cavities of the outer shell 1 to correspond to the two mesh cover fans 2 respectively.

[0039] In this embodiment, if Figure 4 As shown, the liquid inlets of multiple refrigeration coils 7 are gathered into a liquid inlet pipe 9 and then fixed to a side surface of the left end plate 101, and the exhaust ports of multiple refrigeration coils 7 are gathered into a collecting pipe 10 and then fixed to a side surface of the right end plate 102, and one end of the collecting pipe 10 is connected to the exhaust pipe 11.

[0040] Specifically, the refrigerant liquid input through the liquid inlet of each refrigeration coil 7 absorbs heat and evaporates the vapor, which is discharged into the gas collecting pipe 10 through the exhaust port. Then the gas collecting pipe 10 discharges the collected vapor through the exhaust pipe 11, so as to form a continuous circulation and replacement process of the refrigerant in the refrigeration coil 7.

[0041] In this embodiment, if Figure 3 As shown, an electric control box 12 is provided on one side of the left end plate 101 away from the right end plate 102, and a control circuit, electrical components and a main control module for controlling the operation of the mesh fan and the copper tube fin heat exchanger 8 are provided in the electric control box 12. The arrangement of the electrical components in the electric control box 12 and the control principle of the mesh fan and the copper tube fin heat exchanger 8 can be referred to the prior art, and no limitation or elaboration is made here.

[0042] In this embodiment, if Figure 2 As shown, the rear surface of the housing 1 is provided with a liquid inlet opening 13 for communicating with the outside world and the liquid inlet pipe 9 , and an exhaust opening 14 for communicating with the outside world and the exhaust pipe 11 .

[0043] In this embodiment, if Figure 2 As shown, the wire mesh plate 3 is made of stainless steel wire.

[0044] Specifically, the wire mesh plate 3 is hollow and breathable, and air can quickly enter the housing 1 through the wire mesh plate 3. The weaving density of the wire mesh plate 3 is moderate, which can reduce the flying insects running into the housing 1.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel ultra-low temperature air cooler for a double-circuit cascade system with pre-cooling, comprising a housing (1), characterized in that: A mesh fan (2) is symmetrically fixed to the front surface of the shell (1) along the vertical center line, and a wire mesh plate (3) is detachably connected to the rear surface of the shell (1). A left end plate (101) and a right end plate (102) are symmetrically arranged inside the shell (1). A first circuit coil (5) and a second circuit coil (6) are arranged inside the shell (1), and the second circuit coil (6) and the first circuit coil (5) are arranged side by side in front and back. A medium-high temperature refrigerant flows in the first circuit coil (5) and is used when the cold storage temperature is above zero degrees in the initial stage of cooling. A low temperature refrigerant flows in the second circuit coil (6). , used in a cold storage at a temperature below zero degrees, the first circuit coil (5) and the second circuit coil (6) each comprise a plurality of groups of refrigeration coils (7), each group of refrigeration coils (7) comprises a plurality of refrigeration coils (7) stacked in a vertical direction, each of the refrigeration coils (7) extending in a horizontal direction and penetrating and fixed to the left end plate (101) and the right end plate (102), a water storage pan (4) being connected below the shell (1), and an opening (16) being provided at the bottom of the shell (1), the shell (1) being connected to the water storage pan (4) through the opening (16), and a copper tube fin heat exchanger (8) being provided in the water storage pan (4).

2. A novel ultra-low temperature air cooler for a double-circuit cascade system with pre-cooling according to claim 1, characterized in that: The refrigeration coil (7) is distributed in a serpentine shape extending in the horizontal direction.

3. The novel ultra-low temperature air cooler for a double-circuit cascade system with pre-cooling according to claim 1 is characterized in that: The water storage tray (4) is provided with an enclosing edge around its periphery, the bottom of the water storage tray (4) is arranged as an inclined surface, the top of the water storage tray (4) is arranged horizontally, and a drainage outlet (15) is provided at the bottom of the water storage tray (4) on the higher side close to the enclosing edge.

4. The novel ultra-low temperature air cooler for a double-circuit cascade system with pre-cooling according to claim 1 is characterized in that: The copper tube fin heat exchanger (8) is horizontally fixed between the left and right side surfaces of the water storage tray (4).

5. The novel ultra-low temperature air cooler for a double-circuit cascade system with pre-cooling according to claim 1 is characterized in that: The number of the mesh cover fans (2) is two, and the two mesh cover fans (2) are symmetrically distributed about the vertical center line of the housing (1).

6. The novel ultra-low temperature air cooler for a double-circuit cascade system with pre-cooling according to claim 1 is characterized in that: A partition (103) is provided in the middle of the shell (1), and the refrigeration coil (7) passes through and is fixed on the partition (103).

7. The novel ultra-low temperature air cooler for a double-circuit cascade system with pre-cooling according to claim 1 is characterized in that: The liquid inlets of the plurality of refrigeration coils (7) are gathered into a liquid inlet pipe (9) and then fixed to a side surface of the left end plate (101); the exhaust ports of the plurality of refrigeration coils (7) are gathered into an air collecting pipe (10) and then fixed to a side surface of the right end plate (102); one end of the air collecting pipe (10) is connected to the exhaust pipe (11).

8. The novel ultra-low temperature air cooler for a double-circuit cascade system with pre-cooling according to claim 1 is characterized in that: An electric control box (12) is provided on a side of the left end plate (101) away from the right end plate (102), and a control circuit, electrical components and a main control module for controlling the operation of the mesh fan and the copper tube fin heat exchanger (8) are provided in the electric control box (12).

9. The novel ultra-low temperature air cooler for a double-circuit cascade system with pre-cooling according to claim 7, characterized in that: The rear surface of the housing (1) is provided with a liquid inlet opening (13) for connecting the outside world with the liquid inlet pipe (9), and an exhaust opening (14) for connecting the outside world with the exhaust pipe (11).

10. The novel ultra-low temperature air cooler for a double-circuit cascade system with pre-cooling according to claim 1, characterized in that: The wire mesh plate (3) is made of stainless steel wire.

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