CN201488380U

CN201488380U - Constant-voltage and constant-power refrigerating system device used in refrigerating equipment

Info

Publication number: CN201488380U
Application number: CN2009202051197U
Authority: CN
Inventors: 倪军
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-09-16
Filing date: 2009-09-16
Publication date: 2010-05-26
Anticipated expiration: 2019-09-16
Also published as: WO2011032346A1

Abstract

The utility model discloses a constant-voltage and constant-power refrigerating system device used in refrigerating equipment, aiming at improving efficiency and realizing automatic control on the constant-voltage and constant-power consumption of a refrigerating system. The device comprises a frequency conversion compressor, a cooling fan, a condensation radiator, an evaporator, a cold air fan, a restrictor and an electrical controller, wherein the compressor pressurizes and liquefies a refrigerant which is then sent to the condensation radiator, after being throttled by the restrictor, the refrigerant is sent to the evaporator, evaporated and gasified, and then returns to the compressor; the device is characterized in that the structure change of the evaporator is based on the basic structure of 'a heat exchanger used for refrigerating equipment' applied previously; a refrigerant inlet channel of the evaporator is internally provided with an even liquid spraying pipe; a pressure sensor is installed between an exhaust port and the compressor; the restrictor is an electrical control restrictor; and the electrical controller comprises a CPU which controls the coordinate relationship among all parameters in the system device.

Description

Constant-pressure constant-power refrigeration system device for refrigeration equipment

Technical Field

The utility model relates to a refrigerating system device, especially a refrigerating system device of compression evaporation type.

Background

For a long time, after the development of many years and the summarization of several generations, the final compression evaporation type refrigeration system has high refrigeration efficiency and large refrigeration power and is dominant in the use of people. After decades of development, the compressor is developed into a current worm gear type, screw type and other high-efficiency units from a piston type old-fashioned unit, is also developed into a current variable-frequency type variable-speed motor from a former constant-speed motor in terms of power, and develops a new compression technology, but a cooling system still stops before the original technology.

First, the refrigeration throttling device is still in a very low automation position, and a throttling capillary tube or a temperature-sensitive throttling valve is commonly used at present. The throttling capillary tube is a thin tube which is several times smaller than the main flow tube, and the refrigerant is throttled by the capillary tube and then evaporated in the evaporator. The capillary tube is constant and non-adjustable in throttling, and is commonly used in household refrigerators and small refrigerators. The temperature-sensing throttle valve is improved compared with a capillary tube, the temperature of a refrigerant return pipe is sensed through a temperature sensing bulb, the pressure of gas in the temperature sensing bulb is reduced after the temperature of the gas is reduced, and a needle valve in a valve is driven through a corrugated tube to change the size of the throttle. The two throttling methods still have the following problems:

1. the capillary throttling can only be done in a constant manner, since it is not adjustable, so that the output power of the compressor does not change due to the refrigeration output, and the output power will be a fixed value as long as the compressor is started.

2. The temperature-sensing throttle valve can only sense the temperature of the refrigerant return pipe to adjust the throttling degree, the change range of the throttle valve is limited too much, a user cannot adjust the throttle valve at will, and the throttle valve cannot be changed along with the requirement of the evaporator.

3. Both of these throttling methods produce overflow. The liquid refrigerant enters the evaporator too much, does not evaporate and reaches the return air pipe completely, and can flow back to the compressor seriously, so that the oil of the compressor is popped and is sucked by the compressor in a large amount, and the compressor can be subjected to liquid impact, halt and serious damage in serious cases.

Secondly, the structure of the evaporator for refrigeration is too old. Heretofore, various evaporators have been mainly constructed of a coil ct203 and fins ct202 outside the coil (see fig. 14 and 14 a). The evaporator has simple structure and low cost, and is used as a common evaporator by people. However, such an evaporator has the following drawbacks:

1. the evaporation space of the coil is small, the heat transfer performance is poor, so that the evaporation speed of the refrigerant in the coil is seriously influenced, and when the output power of the compressor is excessive, the liquid refrigerant is easy to overflow due to untimely evaporation in the coil. Secondly, the refrigerant in the air conditioner also works with the compressor oil when the air conditioner is running, but the refrigerant evaporates in the evaporator, but the compressor oil does not evaporate, and a large amount of the refrigerant gathers at the lower part of the horizontal pipe, a bend and the like to form an oil block ct201 (see fig. 14a), so that the flow of the refrigerant is influenced, and meanwhile, the heat conductivity of the oil also has certain influence on the evaporation heat transfer of the refrigerant.

2. The external heat transfer conditions of the coil are poor, and some refrigeration equipment adds external heat transfer fins to the coil, but far from the internal heat transfer requirements.

3. The mechanical strength of the coil pipe is poor, and the coil pipe is easy to deform and damage due to external force so as to cause loss of the refrigerant, thereby causing refrigeration failure.

4. For direct cooling equipment, especially for refrigerator equipment, direct cooling coil and articles which are easy to contact with food in the refrigerator, the coil material is easy to pollute the frozen or refrigerated food, and the frozen articles are easy to deteriorate. The refrigerated articles and the easily polluted coil pipe corrode the coil pipe, and the direct perforation can be seriously caused, so that the refrigerant leaks.

5. Since the evaporator of the prior art is basically fixed to the flow of the input refrigerant, too much input causes too much refrigerant to be completely evaporated and to flow back from the return pipe, and too little refrigerant causes uneven refrigeration.

In addition, although the new compressor unit can completely realize variable frequency and variable speed, in the prior art, the variable frequency technology is only embodied on starting and closing, and due to the structural limitation of the evaporator, the power requirement in the refrigeration system has no great relation with the variable frequency technology, and the variable frequency technology has the same main function as a constant speed compressor, stops running when the temperature reaches the set temperature, and starts the compressor when the temperature is higher than the set temperature. The only difference is that the frequency conversion can be started at a low speed and stopped at a low speed. Thus, the technology of frequency conversion of a frequency conversion press is not substantially different from the prior art, or, from another point of view, is not fully applied.

Disclosure of Invention

The utility model aims at providing a structure is advanced is arranged in refrigerating system device of refrigeration plant, and its evaporimeter and condensation radiator's is efficient, adopts and to control the automatically controlled choke valve of its throttle size with CPU, makes refrigeration plant can control compressor driving motor's frequency conversion according to the demand of internal power to realize refrigerating system's constant voltage and balanced power consumption.

In order to achieve the above object, the following technical solutions may be adopted: the constant-pressure constant-power refrigeration system device used in the refrigeration equipment is the same as the prior art, and comprises a variable-frequency compressor, a heat dissipation fan, a condensation radiator, an evaporator, a cold air fan, a restrictor and an electric controller; the compressor pressurizes the refrigerant, the refrigerant is sent to the condensing radiator through a pipeline for liquefaction, the refrigerant is throttled by the throttler and then sent to the evaporator, and the refrigerant returns to the compressor after being evaporated and gasified; the improvement is as follows:

the evaporator comprises at least one metal conductive seat which is formed by drawing and pressing and has a flat rectangular section and a plurality of radiating fins which are vertically arranged on the surface of the metal conductive seat and are parallel to each other; a plurality of parallel pipelines are arranged in the metal conduction seat, and fins which are uniformly distributed along the circumference are arranged on the inner wall of each pipeline; and, the two ends of the above-mentioned pipeline are plugged with the end cap separately; respectively processing a flow channel blind hole vertical to the pipeline on the upper side and the lower side of the metal conduction seat, wherein one is a refrigerant liquid inlet channel, and the other is a refrigerant discharge channel; a thinner liquid homogenizing spray pipe is arranged in the center of the refrigerant liquid inlet channel, and a plurality of small through holes are formed in the pipe wall of the liquid homogenizing spray pipe;

the throttle is an electric control throttle; the valve comprises a valve body, a valve cover, a valve needle arranged at the core part of the valve body and a stepping motor; the throttle orifice of the valve body is connected with the inlet of the liquid homogenizing pipe, the other interface is connected with the input pipe of the refrigerant, and the valve needle is controlled by the stepping motor to move forward and backward, namely the throttle size;

a pressure sensor is arranged between the refrigerant outlet of the evaporator and the compressor;

the electric controller comprises a CPU, and an input interface of the CPU is connected with the operation panel; one input/output interface of the air conditioner is respectively connected with an evaporator temperature sensor, an evaporator air outlet temperature sensor, a room temperature sensor and an air return pressure sensor of the evaporator; the other input/output interface is respectively connected with an electric control throttle valve controller connected with the electric control throttle valve, an air cooler controller connected with an air cooler motor, a compressor controller connected with the compressor and a cooling fan controller connected with the cooling fan.

Furthermore, a refrigerant drying and filtering bottle can be arranged in the space of the outdoor unit, the drying and filtering bottle is filled with drying agent, the upper end of the drying and filtering bottle is provided with an observation window with a transparent cover, the inlet of the drying and filtering bottle is connected with the output port of the compressor, and the outlet of the drying and filtering bottle is connected with a throttle valve in the evaporator.

In order to achieve the above object, the following second technical means may be adopted: the difference between the constant-pressure constant-power refrigeration system device for refrigeration equipment and the technical scheme is only that:

the evaporator comprises at least one metal conductive seat which is formed by drawing and pressing and has a flat rectangular section and a plurality of radiating fins which are vertically arranged on the surface of the metal conductive seat and are parallel to each other; at least one rectangular pipeline is arranged in the metal conduction seat, and a plurality of evaporation fins which are parallel to each other are uniformly distributed in the pipeline; respectively processing a flow channel blind hole vertical to the evaporation fin on the upper side and the lower side of the metal conduction seat, wherein one is a refrigerant liquid inlet channel, and the other is a refrigerant discharge channel; a thinner liquid homogenizing spray pipe is arranged in the center of the refrigerant liquid inlet channel, and a plurality of small through holes are formed in the pipe wall of the liquid homogenizing spray pipe; both ends of the rectangular pipe are sealed with cover plates.

When the refrigeration system device is used (see fig. 13), the power supply is started first, and then the master control temperature and the temperature of the air outlet of the evaporator are set respectively. The total temperature sensor senses the actual temperature of the refrigerating equipment (the temperature of the refrigerated object such as room temperature or the temperature in a refrigerator), and when the actual temperature is sensed to exceed the set total control temperature, the variable frequency compressor and the electric control throttle valve are respectively started (at the moment, the electric control throttle valve is mainly matched with the compressor to start). After the compressor is started, the return air pressure sensor of the evaporator senses the pressure of the return air pipe, and corrects the rotating speed of the variable frequency compressor to keep the return air pressure within a constant pressure range, and the pressure range is subject to the most suitable rapid evaporation of refrigerant. The temperature of evaporimeter body is responded to evaporimeter temperature-sensing ware (can respond to the temperature of its air outlet also), when the body temperature was too high, opens big throttle, and the refrigerant that gets into the evaporimeter increases in a large number, and the pressure of muffler risees this moment, and return-air pressure sensing control compressor increases the rotational speed, and the discharge capacity of increase gas keeps return-air pressure. When the temperature of the body is proper, the electric control throttle valve is closed, the refrigerant entering the evaporator is reduced, the pressure of the air return pipe is reduced, and the pressure sensor controls the rotating speed of the compressor to be reduced to keep the pressure constant. When the air outlet temperature or the evaporator temperature is equal to the set air outlet temperature, the electronic control throttle valve is closed, and the air return pressure sensor controls to reduce the rotating speed of the variable frequency compressor to the minimum or stop. When the temperature rises again, the above program is circulated, namely when the set total control temperature (the total control temperature at this time is set for the cooled object) is reached, the cooling is stopped; and if the set total control temperature is exceeded, the refrigeration is started.

Constant pressure is defined herein as maintaining the pressure in the return line of the evaporator within a constant pressure range that allows the refrigerant to completely evaporate before exiting the evaporator. The constant work means that the temperature of the evaporator rises and needs high power to cool the evaporator, so that the throttle valve is opened greatly, the input of a refrigerant is increased, the displacement of the compressor is increased, and the pressure of an air return channel is constant. When the evaporator temperature drops to or near the set point, the throttle valve is closed and the refrigerant input is reduced, which also reduces the compressor displacement. The practical significance is to measure the power output power consumption.

From the above analysis, the beneficial effects of the utility model are that:

1. the evaporator formed by one-time drawing and pressing has the advantages of simple manufacturing process, mature metal hot drawing and pressing technology, high mechanical strength of the formed evaporator and high heat transfer speed, and particularly the area of an internal evaporation surface can be expanded to an ideal value by the fins formed in the pipeline of the evaporator. And the evaporator pipeline is easy to expand, can be rectangular, square or round, and is designed by mainly the design power and the heat transfer efficiency of the refrigeration equipment.

2. The electronic control throttle valve can enable the throttle opening to reach the positive and negative limit opening degree, the maximum opening degree can be achieved to the designed maximum power, the middle variation value is not limited, and the minimum opening degree can be completely closed. With the electrically controlled throttle valve device, the user can set the temperature of the evaporator completely in the use process, and the use amount of the refrigerant can be accurately controlled, so that the temperature value of the evaporator can be very accurate.

3. After the air pressure sensor is added in the air return pipeline, the return air pressure realizes a stable air pressure through the frequency conversion of the compressor, so that the evaporation speed of the refrigerant in the evaporator reaches an optimal state.

4. The combination of the two devices and the electric appliance controller enables the power consumption to be more reasonable, namely: when the throttle is opened, the air pressure in the return pipe of the evaporator automatically rises, the rotating speed of the compressor also rises along with the rise of the air pressure, and when the throttle is reduced, the air pressure in the return pipe automatically decreases, and the rotating speed of the compressor also decreases along with the decrease of the air pressure, so that the rotation speed and the consumed power of the compressor are indirectly controlled by the electric control throttle valve.

5. The application of the novel evaporator makes the rapid evaporation of the refrigerant possible, and in the traditional coil system, the refrigerant is evaporated in a centralized flow mode, so that the evaporation speed and the evaporation space are very limited. In the new evaporator, the refrigerant is sprayed out through the small holes of the liquid homogenizing spray pipe, the liquid refrigerant is not concentrated any more, the sprayed evaporation surface is very large, the fins of the evaporation pipe formed by the thick wall have excellent heat conductivity, the sprayed refrigerant particles can quickly obtain heat and quickly evaporate, the refrigerant particles are not easy to concentrate, and the refrigerant oil which cannot be evaporated can quickly return to the bottom air return channel under the action of gravity and air pressure to be sucked back, so that oil blockage is avoided.

6. The new evaporator and the liquid homogenizing nozzle are used together to make the work varying refrigerating output possible. In the traditional evaporator technology, the input sizes of an evaporator and a refrigerant are fixed, the evaporator and the refrigerant cannot be large or small, the refrigerant overflows when the evaporator and the refrigerant are too large, and uneven refrigeration can occur when the evaporator and the refrigerant are too small. The new evaporator and the liquid homogenizing nozzle are used together, because the liquid homogenizing nozzle is arranged and the pressure outside the pipe is constant and low, the refrigerant can be rapidly expanded and sprayed out from each small hole no matter how much, the cold range of the evaporator is not a point but a line, and the refrigerant is uniformly sprayed in the liquid inlet channel of the evaporator and rapidly obtains heat on the fins of the evaporation pipe under low pressure to evaporate. The structure is most beneficial to variable input of refrigerant and meets the requirement of variable power input.

In order to facilitate understanding and make the invention clearer, the following description is given by way of example and accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of one of the evaporator structures of fig. 1.

FIG. 3 is a schematic view of section A-A of FIG. 2 in rotation; fig. 3a is a partially enlarged schematic view of part B of fig. 3.

FIG. 4 is a schematic diagram of a second evaporator configuration of FIG. 1; fig. 4a is a schematic cross-sectional view B-B of fig. 4.

FIG. 5a is a schematic view of one of the states in which two evaporators in FIG. 2 or FIG. 4 are combined together; fig. 5b is a schematic view of a second state in which two evaporators of fig. 2 or 4 are combined.

FIG. 6 is an enlarged view of the construction of the homogenizing nozzle installed in the evaporator.

Fig. 7 is an enlarged sectional view of the structure of the electrically controlled throttle valve.

Fig. 8 is an enlarged view of the structure of the air pressure sensor.

Fig. 9 is a schematic diagram of a dry filter flask.

Fig. 10 is a schematic view showing the overall configuration of the refrigerating system apparatus when used in an air conditioner.

Fig. 11 is a schematic view showing the overall structure of the refrigerating system apparatus when used in a refrigerator.

Fig. 12 is an electrical control block diagram in the present refrigeration system apparatus.

Fig. 13 is a schematic flow diagram of the operation of the present refrigerant system arrangement.

FIG. 14 is a schematic view of a prior art evaporator; fig. 14a is an enlarged schematic view of the portion C of fig. 14.

Detailed Description

Example 1, reference is first made to FIG. 1. The constant-pressure constant-power refrigeration system device of the embodiment comprises a variable-frequency compressor 21, a heat radiation fan 22, a condensation radiator 23, an evaporator 9, a cold air fan (not shown in the figure), an electric control throttle valve 901 and an electric control 300 (see fig. 12); the variable frequency compressor 21 pressurizes the refrigerant, the refrigerant is sent to the condensing radiator 23 through a pipeline to be liquefied, the refrigerant is throttled by the electronic control throttle valve 901 and then sent to the evaporator 9, and the refrigerant returns to the compressor 21 after being evaporated and gasified. Wherein,

the evaporator 9 (see fig. 2 and 3) includes at least one tension-compression-molded, flat rectangular-section metal conductive seat 903 and a plurality of fins 901 vertically arranged on the surface of the metal conductive seat 903 and parallel to each other; a plurality of parallel pipelines 907 are arranged in the metal conducting seat 903, and fins 904 which are uniformly distributed along the circumference are arranged on the inner wall of the pipelines 907; both ends of the pipeline 907 are respectively plugged by

plugs

906 and 909; a flow channel blind hole vertical to the pipeline is respectively processed on the upper side and the lower side of the metal conduction seat 903, wherein one is a refrigerant liquid inlet channel 905, and the other is a refrigerant discharge channel 902; a thin liquid homogenizing nozzle 910 (see fig. 6) is installed at the center of the refrigerant inlet channel 905, a plurality of small through holes 9101 are formed on the wall of the liquid homogenizing nozzle 910, and a pipe connector 911 is fixedly connected to the outer end of the liquid homogenizing nozzle to facilitate connection with a pipeline.

The evaporator 9 described above can also be designed to comprise two metallic conductive seats 903 with fins 901 on their surfaces integrally joined (see fig. 5a), or two metallic conductive seats 903 with fins 901 on their backs integrally joined (see fig. 5b), each with their own fin 901, which increases the efficiency of the evaporator.

The electronically controlled throttle valve 901 (see fig. 7) includes a valve body 90104, a valve cover 90109, a valve needle 90105 mounted in the core of the valve body, and a stepping motor. The stepping motor includes a motor rotor 90107, a rotor magnet 9010701, a drive coil 90108, and an outgoing cable 90101. Wherein the drive coil 90108 is arranged in the valve cover 90109, and the motor rotor 90107 is connected with the valve needle 90105 through threads. The throttle 901010 of the valve body 90104 is connected with the inlet pipe joint of the uniform liquid injection pipe 910 through a pipeline, the other port 90106 is connected with the input pipe of the refrigerant, and the valve needle 90105 is controlled by a stepping motor to move forward and backward, namely, the throttle size.

A pressure sensor 902 is also provided between the refrigerant discharge port of the evaporator 9 and the compressor 21.

The electric controller 300 (see fig. 12) includes a CPU, an input interface of which is connected to the operation panel; one input/output interface of the air conditioner is respectively connected with an evaporator temperature sensor, an evaporator air outlet temperature sensor, a room temperature sensor and an air return pressure sensor of the evaporator; the other input/output interface is respectively connected with an electric control throttle valve controller connected with the electric control throttle valve, an air cooler controller connected with an air cooler motor, a compressor controller connected with the compressor and a cooling fan controller connected with the cooling fan.

In addition, a refrigerant drying filter bottle 25 (see fig. 9) may be additionally installed in the pipe between the electrically controlled throttle 901 and the liquid outlet of the condensing radiator 23, the drying filter bottle 25 contains a drying agent 2506, and the upper end thereof is provided with a viewing window 2502 with a transparent cover, the inlet 2503 of the drying filter bottle is connected with the output port of the condensing radiator 23, and the outlet 2504 is connected with the electrically controlled throttle 901, and fig. 8 also shows a bottle body 2501 and an air pipe 2505 arranged in the bottle, and the upper end of the air pipe is connected with the outlet 2504.

Example 2, see also fig. 4 and 4 a. The present embodiment is different from the above embodiments only in the structure of the evaporator thereof slightly. Namely: the evaporator 09 comprises at least one metal conducting base 0903 which is formed by drawing and pressing and has a flat rectangular cross section, and a plurality of radiating fins 0901 which are vertically arranged on the surface of the metal conducting base and are parallel to each other; at least one rectangular pipeline 09031 is arranged in the metal conducting seat 0903, and a plurality of parallel evaporation fins 0904 are uniformly distributed in the pipeline 09031; a flow channel blind hole vertical to the evaporation fin is respectively processed on the upper side and the lower side of the metal conduction seat 0903, wherein one is a refrigerant liquid inlet channel 0905, and the other is a refrigerant discharge channel 0902; a thin uniform liquid spray tube 0910 is arranged in the center of the refrigerant liquid inlet channel 0905, and the tube wall of the uniform liquid spray tube 0910 is provided with a plurality of small through holes 9101. The ends of the rectangular pipe are sealed with

caps

09032 and 09033. Rectangular tube 09031 may also be designed as a square, oval, or other shape.

Fig. 10 is a schematic view of the overall configuration of the present refrigeration system apparatus when used in an air conditioner 100. The electronically controlled throttle valve 901 is shown mounted directly on the inlet of the evaporator 9 and the air pressure sensor 902 is shown mounted directly on the outlet of the evaporator 9. The cool air blower 6 is disposed below the evaporator 9.

Fig. 11 is a schematic view of the overall structure of the present refrigeration system apparatus when used in a refrigerator 200. The evaporator 09 and the cool air blower 06 are disposed in the tunnel of the rear part of the refrigerator 200, the heat dissipation blower 022 and the condensation heat sink 023 are disposed outside the back panel of the refrigerator 200, and the inverter compressor 021 is disposed below the rear part of the refrigerator 200.

The above is only a preferred embodiment of the present invention, but it should not be construed as limiting the scope of the invention, i.e. the invention should not be subject to the modifications and variations of the invention, which are equivalent to the claims.

Claims

1. A constant-pressure constant-power refrigeration system device for refrigeration equipment comprises a variable-frequency compressor, a heat dissipation fan, a condensation radiator, an evaporator, a cold air fan, a restrictor and an electric controller; after the compressor pressurizes the refrigerant, the refrigerant is sent to a condensation radiator through a pipeline for liquefaction, then is sent to an evaporator after being throttled by a throttler, and returns to the compressor after being evaporated and gasified; the method is characterized in that:

the throttle is an electric control throttle; the valve comprises a valve body, a valve cover, a valve needle arranged at the core part of the valve body and a stepping motor; the throttle orifice of the valve body is connected with the inlet of the uniform liquid spray pipe, the other interface is connected with the input pipe of the refrigerant, and the valve needle is controlled by the stepping motor to move forward and backward, namely the throttle size;

2. The constant-pressure constant-power refrigerating system device used in the refrigerating equipment as claimed in claim 1, wherein:

the pipeline between the electric control throttle valve and the liquid outlet of the condensing radiator is also connected with a refrigerant drying filter bottle, the drying filter bottle is filled with drying agent, the upper end of the drying filter bottle is provided with an observation window with a transparent cover, the inlet of the drying filter bottle is connected with the output port of the condensing radiator, and the outlet of the drying filter bottle is connected with the electric control throttle valve.

3. The constant pressure constant power refrigerator system as claimed in claim 1 or 2, wherein said evaporator comprises two metal conductive bases, the radiating fins on the surfaces of said two metal conductive bases are integrally connected, or the two metal conductive bases are integrally connected back to back, each metal conductive base has its own radiating fin.

4. A constant-pressure constant-power refrigeration system device for refrigeration equipment comprises a variable-frequency compressor, a heat dissipation fan, a condensation radiator, an evaporator, a cold air fan, a restrictor and an electric controller; the compressor pressurizes and liquefies the refrigerant through a pipeline, then sends the refrigerant to a condensation radiator, throttles the refrigerant through a throttleer, then sends the refrigerant to an evaporator, and the refrigerant returns to the compressor after being evaporated and gasified; the method is characterized in that:

the evaporator comprises at least one metal conductive seat which is formed by drawing and pressing and has a flat rectangular section and a plurality of radiating fins which are vertically arranged on the surface of the metal conductive seat and are parallel to each other; at least one rectangular pipeline is arranged in the metal conduction seat, and a plurality of evaporation fins which are parallel to each other are uniformly distributed in the pipeline; respectively processing a flow channel blind hole vertical to the evaporation fin on the upper side and the lower side of the metal conduction seat, wherein one is a refrigerant liquid inlet channel, and the other is a refrigerant discharge channel; a thinner liquid homogenizing spray pipe is arranged in the center of the refrigerant liquid inlet channel, and a plurality of small through holes are formed in the pipe wall of the liquid homogenizing spray pipe; two ends of the rectangular pipeline are sealed by cover plates;

5. The constant-pressure constant-power refrigerating system device used in the refrigerating equipment as claimed in claim 4, wherein:

6. The constant pressure constant power refrigerator system as claimed in claim 4 or 5, wherein said evaporator comprises two metal conductive bases, the radiating fins on the surfaces of said two metal conductive bases are integrally connected, or the two metal conductive bases are integrally connected back to back, each metal conductive base has its own radiating fin.