CN117387268A - A coaxial tube bundle evaporator for an extrusion ice machine - Google Patents

Abstract

The invention discloses a coaxial tube bundle evaporator of an extrusion type ice maker, which comprises a base, a sealing cover and a refrigeration cylinder. The refrigerating cylinder is made of aluminum alloy; the refrigerating cylinder is provided with a liquid inlet channel, a liquid outlet channel and a refrigerating channel communicated with the two channels; the liquid inlet channel and the liquid outlet channel are respectively positioned at two end surfaces of the refrigeration cylinder; the refrigeration channels are multiple in number; the plurality of refrigeration channels are uniformly distributed along the circumferential direction of the axis of the refrigeration cylinder; according to the invention, the plurality of refrigerating channels are formed in the refrigerating cylinder, and the heat exchange medium is introduced into the refrigerating channels to complete phase change in the refrigerating channels and absorb heat, so that the inner cavity of the refrigerating cylinder is refrigerated. The arrangement of the refrigerating channel reduces the distance between the refrigerant and the water in the refrigerating cylinder, thereby reducing the heat conduction resistance between the refrigerant and the water in the refrigerating cylinder, improving the heat exchange rate of the refrigerant and the running water in the refrigerating cylinder and reducing the energy consumption.

Description

A coaxial tube bundle evaporator for an extrusion ice machine

Technical field

The invention relates to the field of refrigeration technology, and in particular to a coaxial tube bundle evaporator of an extrusion ice making machine.

Background technique

A traditional refrigeration system has an evaporator, condenser, throttling device and compressor. Among them, the evaporator passes the water flow that needs to be cooled into the inner cavity. At the same time, a stainless steel tube is wrapped around the outer surface of the evaporator; the low-temperature refrigerant liquid flows through the stainless steel tube and exchanges heat with the water flow in the evaporator to achieve the effect of cooling the water flow in the evaporator.

The patent application with the publication number "CN111964482A" provides a spirally wound tube evaporator, which includes a spirally wound tube, a baffle, a liquid inlet pipeline, a tube side outlet pipeline and a return air adjustment pipeline. The spirally wound tube is arranged in sections and folded. The baffle is arranged between two adjacent sections of spirally wound tubes. The baffle includes a gap, an exhaust chamber and an intake mixing chamber. The two adjacent sections of spirally wound tubes are connected through the gap, and the exhaust chamber is connected with the intake mixing chamber. The exhaust chamber is connected to the previous section of spiral wound tube, the air inlet mixing chamber is connected to the latter section of spiral wound tube, the liquid inlet pipeline is connected to the first section of spiral wound tube and each intake mixing chamber respectively, and the outlet pipeline on the side of the tube is connected to the last section of spiral wound tube respectively. The winding pipe is connected to each exhaust chamber, and the return air adjustment pipeline is connected to the tube side outlet pipeline and each intake mixing chamber respectively. The evaporator of the present invention can effectively adjust the tube side dryness to be in the most efficient evaporation heat exchange area, eliminate the shell side flow dead zone, strengthen the shell side fluid disturbance, ultimately strengthen the tube side heat exchange and shell side heat transfer, and improve the overall exchange of the evaporator. Thermal uniformity.

In the above-mentioned patent, a spiral wound tube is provided to perform heat exchange and cooling of the liquid in the evaporator, but the heat exchange efficiency will be affected by the flow rate of the refrigerant in the spiral wound tube and the wall thickness of the spiral wound tube; making the heat exchange and cooling of the evaporator Efficiency is reduced.

Contents of the invention

The object of the present invention is to provide a coaxial tube bundle evaporator for an extrusion ice making machine.

In a first aspect, the present invention provides a coaxial tube bundle evaporator for an extrusion ice machine, which includes a base, a sealing cover and a refrigeration cylinder; the material of the refrigeration cylinder is aluminum alloy; the refrigeration cylinder There are a liquid inlet channel and a liquid outlet channel between the outer circumferential surface of the cylinder and the inner ring wall, as well as a refrigeration channel connecting the two channels; the liquid inlet channel and the liquid outlet channel are respectively located on both sides of the refrigeration cylinder. End face; there are multiple refrigeration channels, evenly distributed on the axis of the refrigeration cylinder in the circumferential direction; the refrigeration cylinder is provided with a liquid inlet pipe and a liquid outlet pipe that are connected to the liquid inlet channel and the liquid outlet channel respectively; the base , sealing covers are respectively fixed on both ends of the refrigeration cylinder; the base seals the opening of the liquid outlet channel; the sealing cover seals the liquid inlet channel.

Preferably, both the liquid inlet channel and the liquid outlet channel are annular.

Preferably, the refrigeration channel is linear and its axis is parallel to the axis of the refrigeration cylinder.

Preferably, the refrigeration channel is cylindrical.

Preferably, there is a water inlet on the base that communicates with the inner cavity of the refrigeration cylinder.

Preferably, the sealing cover is provided with a central through hole communicating with the inner cavity of the refrigeration cylinder.

Preferably, the aperture of the refrigeration channel is 3 mm to 9 mm; the distance between two adjacent refrigeration channels is 0.5 mm to 2 mm.

In a second aspect, the present invention provides a refrigeration method that uses the coaxial tube bundle evaporator of an extrusion ice making machine described in the first aspect; during the refrigeration process, the heat exchange medium is input into the liquid inlet channel and passes through multiple Each refrigeration channel is divided; the heat exchange medium completes the phase change in the refrigeration channel, absorbs heat, and reduces the temperature of the inner cavity of the refrigeration cylinder; the heat exchange medium in each refrigeration channel merges and is output at the liquid outlet channel.

In a third aspect, the present invention provides an extrusion ice making machine, which includes an ice dispensing module; and an evaporator as described in the second aspect; the ice discharging module includes a driving element, a rotating shaft, and an ice discharging module fixed on the rotating shaft. Spiral scraper; the rotating shaft is rotatably connected in the refrigeration cylinder, and the axis of the rotating shaft coincides with the axis of the refrigeration cylinder; the driving element is used to drive the rotating shaft to rotate; the central through hole of the sealing cover serves as the outlet of the extrusion ice making machine Bingkou.

Preferably, the ice dispensing module further includes a protective sleeve; the protective sleeve is nested between the refrigeration cylinder and the spiral scraper.

The beneficial effects of the present invention are:

1. In the present invention, a plurality of refrigeration channels are opened on the refrigeration cylinder, and the heat exchange medium is introduced into the refrigeration channels. The heat exchange medium completes the phase change in the refrigeration channels and absorbs heat; thus the inner surface of the refrigeration cylinder is cavity for cooling. The setting of the refrigeration channel reduces the distance between the refrigerant and the water in the refrigeration cylinder, thereby reducing the thermal resistance between the refrigerant and the water in the refrigeration cylinder, thereby improving the flow rate of the refrigerant and the water in the refrigeration cylinder. heat exchange rate. Reduces energy consumption and promotes water circulation and uniform condensation.

2. The material of the refrigeration cylinder in the present invention is aluminum alloy. The thermal conductivity of aluminum alloy is 238W/(m·K), which is much higher than the thermal conductivity of stainless steel (10~30W/(m·K)), thus improving the efficiency of refrigeration. heat exchange efficiency between agent and water.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

Figure 2 is an exploded schematic diagram of the overall structure of Embodiment 1 of the present invention;

Figure 3 is a schematic structural diagram of the refrigeration channel in the refrigeration cylinder in Embodiment 1 of the present invention;

Figure 4 is an exploded schematic diagram of the overall structure of Embodiment 2 of the present invention.

Among them, 1. Base; 2. Sealing cover; 3. Refrigeration cylinder; 3-1. Refrigeration channel; 3-2. Liquid inlet channel; 3-3. Liquid outlet channel; 3-4. Liquid inlet. tube; 3-5, liquid outlet tube; 4, ice outlet module; 4-1, spiral scraper; 4-2, protective sleeve.

Detailed ways

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

As shown in Figures 1 and 2, a coaxial tube bundle evaporator of an extrusion ice machine includes a base 1, a sealing cover 2, and a refrigeration cylinder 3 fixed on the base 1. The base 1 is provided with a water inlet and is connected with the inner cavity of the refrigeration cylinder 3 . The material used in the refrigeration cylinder 3 is aluminum alloy. The thermal conductivity of aluminum alloy is 238W/(m·K), which is much higher than the thermal conductivity of stainless steel (10~30W/(m·K)), thus improving the heat exchange efficiency between refrigerant and water.

As shown in Figure 3, a refrigeration channel is opened between the outer circumferential surface of the refrigeration cylinder 3 and the inner ring wall. The refrigeration channel includes a liquid inlet channel 3-2, a liquid outlet channel 3-3, and a refrigeration channel 3-1 connecting the two channels. Both the liquid inlet channel 3-2 and the liquid outlet channel 3-3 are annular. The liquid inlet channel 3-2 and the liquid outlet channel 3-3 are respectively provided at both ends of the refrigeration cylinder 3. The base 1 and the sealing cover 2 are respectively fixed at both ends of the refrigeration cylinder 3; the base 1 closes the opening of the liquid outlet channel 3-3; the sealing cover 2 closes the liquid inlet channel 3-2. The refrigeration cylinder 3 is provided with a liquid inlet pipe opening 3-4 and a liquid outlet pipe 3-5 that communicate with the liquid inlet channel 3-2 and the liquid outlet channel 3-3 respectively. There are a plurality of refrigeration channels 3-1, and each refrigeration channel 3-1 is evenly distributed along the circumferential direction of the axis of the refrigeration cylinder 3.

The axis of each refrigeration channel is parallel to the axis of the refrigeration cylinder 3. The aperture of the refrigeration channel 3-1 is 4 to 6 mm; the smaller the spacing between the refrigeration channels, the larger the aperture of the refrigeration channel and the higher the heat exchange rate;

During the refrigeration process, the heat exchange medium is input into the liquid inlet channel 3-2 and split through multiple refrigeration channels 3-1; the heat exchange medium completes a phase change in the refrigeration channels 3-1, absorbs heat, and reduces the temperature of the refrigeration cylinder. 3. The temperature of the inner cavity; the heat exchange medium in each refrigeration channel 3-1 is merged and output at the liquid outlet channel 3-3. By increasing the flow path of the refrigerant, the heat exchange area is increased; at the same time, the relative flow rate of the water flow and the refrigerant in the inner cavity of the refrigeration cylinder 3 is controlled, thereby improving the heat exchange efficiency.

Example 2

As shown in Figure 1, an extrusion ice making machine includes a base 1, an ice making module 4, and a refrigeration cylinder 3 fixed on the base 1. The base 1 is provided with a water inlet and is connected with the inner cavity of the refrigeration cylinder 3 . The material used in the refrigeration cylinder 3 is aluminum alloy. The thermal conductivity of aluminum alloy is 238W/(m·K), which is much higher than the thermal conductivity of stainless steel (10~30W/(m·K)), thus improving the heat exchange efficiency between refrigerant and water.

As shown in Figure 3, multiple refrigeration channels are opened between the outer circumferential surface and the inner ring wall of the refrigeration cylinder 3. The refrigeration channel includes a liquid inlet channel 3-2, a liquid outlet channel 3-3, and a refrigeration channel 3-1 connecting the two channels. Both the liquid inlet channel 3-2 and the liquid outlet channel 3-3 are annular. The liquid inlet channel 3-2 and the liquid outlet channel 3-3 are respectively provided at both ends of the refrigeration cylinder 3. The base 1 and the sealing cover 2 are respectively fixed at both ends of the refrigeration cylinder 3; the base 1 closes the opening of the liquid outlet channel 3-3; the sealing cover 2 closes the liquid inlet channel 3-2. The refrigeration cylinder 3 is provided with a liquid inlet pipe opening 3-4 and a liquid outlet pipe 3-5 that communicate with the liquid inlet channel 3-2 and the liquid outlet channel 3-3 respectively.

Each refrigeration channel 3-1 is evenly distributed along the circumferential direction of the axis of the refrigeration cylinder 3. Both the liquid inlet channel 3-2 and the liquid outlet channel 3-3 are annular. The liquid inlet channel 3-2 and the liquid outlet channel 3-3 are respectively located at both end faces of the refrigeration cylinder 3. The refrigeration cylinder 3 is provided with a liquid inlet pipe 3-4 and a liquid outlet pipe 3-5 that communicate with the liquid inlet channel 3-2 and the liquid outlet channel 3-3 respectively.

The refrigeration channel 3-1 is cylindrical, and the axis of each refrigeration channel 3-1 is parallel to the axis of the refrigeration cylinder 3. The aperture of the refrigeration channel 3-1 is 4 to 6 mm; the smaller the spacing between the refrigeration channels, the larger the aperture of the refrigeration channel and the higher the heat exchange rate;

The ice discharging module 4 includes a driving element, a sealing cover 2, a rotating shaft and a spiral scraper 4-1 fixed on the rotating shaft. The rotating shaft is rotatably connected in the refrigeration cylinder 3, and the axis of the rotating shaft coincides with the axis of the refrigeration cylinder 3. The driving element is used to drive the rotating shaft to rotate around the central axis. The sealing cover 2 is fixed at the port of the refrigeration cylinder 3; the sealing cover 2 is used to seal the outer end of the liquid inlet channel 3-2 in the refrigeration cylinder 3. The sealing cover 2 is provided with an ice outlet. During use, the driving element drives the spiral scraper 4-1 to rotate, thereby scraping off the ice condensed on the inner wall of the refrigeration cylinder 3. The ice is discharged from the sealing cover 2 under the action of the spiral scraper 4-1. Extruded from the mouth. During the ice making process, refrigerant is introduced into the refrigeration channel 3-1 to refrigerate the liquid in the inner cavity of the refrigeration cylinder 3. Different refrigeration systems require different refrigerant flow rates to achieve the best cooling effect.

The present invention provides an optional technical feature: as shown in Figure 4, the ice outlet module 4 also includes a stainless steel protective sleeve. The 4-2 stainless steel protective sleeve is nested in the inner cavity of the refrigeration cylinder 3; it is used to prevent the spiral scraper 4-1 from scratching the inner wall of the refrigeration cylinder 3 during the rotation process, thereby affecting the ice making efficiency. If the strength of the aluminum alloy meets the requirements, this sleeve does not need to be used.

Claims (9)

1. A coaxial tube bundle evaporator for an extrusion ice machine, including a base (1), a sealing cover (2) and a refrigeration cylinder (3); characterized in that: the refrigeration cylinder (3) The material is aluminum alloy; a liquid inlet channel (3-2) and a liquid outlet channel (3-3) are provided between the outer circumferential surface of the refrigeration cylinder (3) and the inner ring wall, and two connected The refrigeration channel (3-1) of the channel; the liquid inlet channel (3-2) and the liquid outlet channel (3-3) are respectively located at both ends of the refrigeration cylinder (3); the refrigeration channel (3-1 ); a plurality of refrigeration channels (3-1) are evenly distributed along the circumferential direction of the axis of the refrigeration cylinder (3); the refrigeration cylinder (3) is provided with a liquid inlet channel (3-2) and an outlet The liquid channel (3-3) is connected to a liquid inlet pipe (3-4) and a liquid outlet pipe (3-5) respectively; the base (1) and sealing cover (2) are respectively fixed on the refrigeration cylinder ( 3); the base (1) closes the opening of the liquid outlet channel (3-3); the sealing cover (2) closes the liquid inlet channel (3-2). 2. A coaxial tube bundle evaporator of an extrusion ice making machine according to claim 1, characterized in that: the liquid inlet channel (3-2) and the liquid outlet channel (3-3) All are in the shape of a circle. 3. A coaxial tube bundle evaporator for an extrusion ice making machine according to claim 1, characterized in that: the refrigeration channel (3-1) is linear and the axis is parallel to the refrigeration cylinder. (3) axis. 4. A coaxial tube bundle evaporator for an extrusion ice making machine according to claim 1, characterized in that: the refrigeration channel (3-1) is cylindrical. 5. A coaxial tube bundle evaporator for an extrusion ice machine according to claim 1, characterized in that: the water inlet on the base (1) is connected to the inner cavity of the refrigeration cylinder (3). . 6. A coaxial tube bundle evaporator for an extrusion ice making machine according to claim 1, characterized in that: the sealing cover (2) is provided with a refrigerant cylinder (3) connected to the inner cavity of the refrigerating cylinder (3). Center through hole. 7. A refrigeration method, characterized by: using a coaxial tube bundle evaporator of an extrusion ice making machine according to any one of claims 1-6; during the refrigeration process, the heat exchange medium is input into the liquid channel (3-2), and is diverted through multiple refrigeration channels (3-1); the heat exchange medium completes a phase change in the refrigeration channel (3-1), absorbs heat, and reduces the temperature in the refrigeration cylinder (3). The temperature of the cavity; the heat exchange medium in each refrigeration channel (3-1) is merged and output at the liquid outlet channel (3-3). 8. An extrusion ice making machine, comprising an ice dispensing module (4); characterized in that: it also includes an evaporator as claimed in claim 6; the ice discharging module (4) includes a driving element, a rotating shaft and a a spiral scraper (4-1) fixed on the rotating shaft; the rotating shaft is rotationally connected in the refrigeration cylinder (3), and the axis of the rotating shaft coincides with the axis of the refrigeration cylinder (3); the driving element is used to drive the rotating shaft to rotate; The center through hole of the sealing cover (2) serves as the ice outlet of the extrusion ice maker. 9. An extrusion ice making machine according to claim 8, characterized in that: the ice dispensing module (4) further includes a stainless steel protective sleeve (4-2); a stainless steel protective sleeve (4- 2) Nested between the refrigeration cylinder (3) and the spiral scraper (4-1).