CN210921916U

CN210921916U - Low-temperature refrigeration house cooling system

Info

Publication number: CN210921916U
Application number: CN201921979121.XU
Authority: CN
Inventors: 朱长生
Original assignee: Kunming Kanous Refrigeration Technology Co ltd
Current assignee: Kunming Kanous Refrigeration Technology Co ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-07-03
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses a low temperature freezer cooling system, Italy bizel 6SLW-3200 double stage compressor is selected for use to the compressor, the connection is provided with the cooling tower on the condenser, and the cooling tower uses Guangzhou's good letter 20 tons/h cooling tower, the expansion valve selects the expansion valve of danofluosi for use, and the refrigerating output of expansion valve selects for 26KW, and minimum evaporating temperature sets up to 60 degrees below zero, and the evaporimeter uses 8 to 9 fans that power is 500W to supply air, and the fan sets up to 2 rows, and the fan of upper and lower row sets up the blank between two fans of the same row respectively, and the system adopts R404A refrigerant; on the premise of not increasing the equipment power, the refrigeration house can be reduced to 50 ℃ below zero within 2 hours, meanwhile, the equipment configuration used by the system is the optimal equipment configuration, and the total power of the used equipment is not higher than that of the common refrigeration house equipment, but can meet the requirement of reducing the room temperature to 50 ℃ below zero within 2 hours.

Description

Low-temperature refrigeration house cooling system

Technical Field

The utility model relates to a novel automatic instrument and meter refrigeration technology field, concretely relates to low temperature freezer cooling system.

Background

The freezer is one kind of refrigeration plant. The cold storage is a constant temperature and humidity storage device which creates an environment with different outdoor temperature or humidity by manual means and is used for food, liquid, chemical engineering, medicine, vaccines, scientific experiments and other articles. The cold store is usually located near the port of transportation or the place of origin. Compared with the refrigerator, the refrigeration house has larger refrigeration area and a common refrigeration principle. The general cold storage is mostly refrigerated by a refrigerator, and liquid (ammonia or freon) with very low gasification temperature is used as a coolant to evaporate under the conditions of low pressure and mechanical control to absorb heat in the cold storage, thereby achieving the purpose of cooling. The common use is a compression refrigerator, which mainly comprises a compressor, a condenser, a throttle valve, an evaporation tube and the like.

The mode of the evaporating tube device can be divided into direct cooling and indirect cooling. The evaporation tube is installed in the cold storage room in the direct cooling mode, and when liquid coolant passes through the evaporation tube, heat in the cold storage room is directly absorbed to be cooled. The indirect cooling is that the air in the storehouse is sucked into the air cooling device by the blower, and the air is cooled by sending the air into the storehouse after being absorbed by the evaporating pipe which is coiled in the cooling device. The air cooling mode has the advantages of rapid cooling, uniform temperature in the warehouse and capability of taking harmful gases such as carbon dioxide and the like generated in the storage process out of the warehouse. The freezing temperature is generally between-10 ℃ and-30 ℃, but the temperature is required to be-50 ℃ in special places, such as a weapon storage laboratory and the like.

Most of the existing refrigeration houses are built at the end of the last century or at the beginning of the century, the service life is long, equipment faults are frequent, the repair difficulty is high, the existing refrigeration houses are mostly cooled at the temperature of 10-30 ℃ below zero no matter old or limited to refrigeration, the temperature is difficult to be reduced to 50 ℃ below zero no matter new equipment is replaced or other improvements are difficult to achieve, and the specific refrigeration requirements cannot be met. In the construction of cold stores, the rational arrangement of the entire system is important, in particular for the main refrigeration components such as: the adaptation selection of an evaporator, a condenser, a compressor, an expansion valve and even a fan and the like is very critical, if the configuration is not good, the most newly-built equipment is used in time, the requirement of minus 50 ℃ is difficult to achieve, and the requirements are all achieved by sacrificing a large amount of power, even the power is difficult to achieve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low temperature freezer cooling system solves the freezer that last century later stage or this century early built, and old still is difficult to reach the problem of 50 degrees below zero temperature requirements under the prerequisite of having changed new high power equipment.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a low temperature freezer cooling system, which comprises a compressor, the high-pressure meter, high low pressure controller, the oil separator, the condenser, the reservoir, the filter, the solenoid valve, the expansion valve, the evaporimeter, vapour and liquid separator, support the manometer, the compressor is connected with the oil separator, the oil separator is connected with the condenser, the condenser is connected with the reservoir, the reservoir is connected with the filter, the filter is connected with the expansion valve, the expansion valve is connected with the evaporimeter, the evaporimeter is connected with vapour and liquid separator, vapour and liquid separator is connected to the compressor, the preceding high-pressure meter that is provided with of compressor, the rear end is provided with supports the manometer, still be provided with the solenoid: the refrigeration house further comprises a refrigeration house shell, and high-low pressure controllers are connected and arranged at the front end and the rear end of the compressor. The air-conditioning system is characterized in that an Italian Bizel 6SLW-3200 two-stage compressor is selected as the compressor, a cooling tower is connected to the condenser and used as a 20-ton/h cooling tower in Guangzhou Liangxin, an expansion valve of Danofluos is selected as the expansion valve, the refrigerating capacity of the expansion valve is selected to be 26KW, the lowest evaporation temperature is set to be 60 ℃ below zero, 8-9 fans with the power of 500W are used for supplying air to the evaporator, the fans are set to be 2 rows, the fans in the upper row and the lower row are respectively arranged in the blank between the two fans in the same row, and R404A refrigerant is.

Furthermore, the shell of the refrigeration house is square, one side of the shell is provided with a machine room, the system number equipment is arranged in the machine room, the air inlet and the air outlet of the refrigeration house are respectively arranged at the front end and the rear end of a wall body on one side of the refrigeration house, the air outlet of the refrigeration house is provided with a section of blank room as the air inlet of the evaporator, and the door of the refrigeration house is arranged at the air outlet of the refrigeration house.

Further, the illuminating lamp in the refrigeration house uses an embedded LED lamp.

Furthermore, a low-temperature heat-insulating layer is arranged in the heat-insulating layer.

Compared with the prior art, the beneficial effects of the utility model are that:

on the premise of not increasing the equipment power, the refrigeration house can be reduced to 50 ℃ below zero within 2 hours, meanwhile, the equipment configuration used by the system is the optimal equipment configuration, and the total power of the used equipment is not higher than that of the common refrigeration house equipment, but can meet the requirement of reducing the room temperature to 50 ℃ below zero within 2 hours.

Drawings

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

Fig. 2 is a diagram of the fan of the present invention 8.

Fig. 3 is a view of the fan of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in the figure, the low-temperature refrigeration house cooling system comprises a compressor 1, a high-pressure meter, an oil separator, a condenser 2, a liquid storage device, a filter, a solenoid valve, an expansion valve 3, an evaporator 4, a gas-liquid separator and a pressure meter, wherein the compressor 1 is connected with the oil separator, the oil separator is connected with the condenser 2, the condenser 2 is connected with the liquid storage device, the liquid storage device is connected with the filter, the filter is connected with the expansion valve, the expansion valve is connected with the evaporator, the evaporator is connected with the gas-liquid separator, the gas-liquid separator is connected to the compressor 1, the high-pressure meter is arranged in front of the compressor 1, the pressure meter is arranged. In refrigerating system, refrigerated four main equipment, compressor 1, condenser 2, the suitability of evaporimeter 4 and expansion valve 3 is very important, four reasonable not only can the optimization system of collocation each other, just can reach refrigerated demand under minimum power, if the collocation is not good, even all use powerful equipment, the demand of cooling can not reach at all, according to actual production statistics, in the setting of freezer in particular, when reducing the temperature of freezer from the room temperature to 35 degrees below zero, the big unit of 130KW needs to be used to ordinary equipment, and, because the power of unit is greater than actual design power, still can lead to the unit to climb the frost, even more very, still can cause damp car to lead to the equipment to damage because the unreasonable use of expansion valve, therefore, the suitability of equipment is very important. One reasonable formulation is: the front end and the rear end of the compressor 1 are connected with high-low pressure controllers which reasonably control the pressure difference of the inlet and the outlet of the compressor 1. A high and low pressure control valve is provided which is actually a bypass valve connected only between the compressor discharge pipe and the suction pipe. When the suction pressure is higher than the set value of the valve (generally set at 0.4MPa gauge pressure), the valve is in a closed state. When the suction pressure is lower than the set value of the valve, the valve is opened, and the high-temperature high-pressure superheated steam in the exhaust pipe directly flows back to the cold air pipe. Due to the combined action of the membrane and the reed in the valve, the lower the low pressure is, the larger the opening degree of the valve is, thus ensuring that the suction pressure is higher than a certain value, and leading the compressor to suck the superheated steam of the refrigerant. Specifically, the compressor 1 is a Italy bizel 6SLW-3200 two-stage compressor, the double-40 HP two-stage compressor is stable in performance and strong in adaptability, and meanwhile, the condenser 2 is connected with a cooling tower which is 20 tons/h cooling tower in Cangzhou Liangxin.

Through many years of experiments, the matching of equipment and the cold displacement of the evaporator are the main original factors causing unit frost climbing, and reasonable cold displacement of the evaporator is necessary. Therefore, in the matching, the selection of the expansion valve is also important, and the thermostatic expansion valve is an important part forming the refrigerating device and is one of four basic devices in the refrigerating system. It achieves a pressure drop from condensing pressure to evaporating pressure while controlling the flow of refrigerant; although its volume is small, its action is huge, and its working quality can directly determine the operation performance of whole system. In this system, expansion valve 3 chooses the expansion valve of danoflos for use, the refrigerating output of expansion valve is selected for 26KW, minimum evaporating temperature sets up to 60 degrees below zero, and simultaneously, in order to carry out the heat exchange as fast as possible, evaporimeter 4 uses 8 to 9 power to carry out the air feed for 500W's fan, the fan sets up to 2 rows, the fan of upper and lower row sets up the blank department between two fans of same row respectively, and, the system adopts R404A refrigerant, general R22 can not reach the demand, R404A refrigerant machine environmental protection is practical again, can effectually carry out the heat exchange like this, prevent that unnecessary cold volume backward flow from leading to equipment to climb the frost. In this system, the fan mutual adaptation of compressor 1, condenser 2, expansion valve 3 and evaporimeter 4 uses R404A refrigerant as the medium, will need high-power equipment originally just can reach 50 degrees freezer under zero, just can be in 2 hours with the temperature of freezer from the room temperature to 50 degrees under zero at 30KW to, the condition of climbing the frost can not appear in make full use of system's equipment yet, very big saving electric resource.

More specifically, for the cooling that better keeping can be quick, the freezer casing sets up to square, and one side is provided with the computer lab, and system number equipment sets up in the computer lab, and the air intake and the air outlet of freezer set up both ends around freezer side wall body respectively, and freezer air outlet department is provided with one section blank room as the air intake of evaporimeter 4, and the freezer door sets up the air outlet department at the freezer.

Furthermore, the illuminating lamp in the refrigeration house uses the embedded LED lamp, the common lamp can generate a large amount of heat, the common lamp is not safe, the LED lamp is used for enhancing the safety, and the streamer degree is improved.

Furthermore, due to various reasons such as aging of buildings and the like, the heat preservation effect of the refrigeration house is already in the past, and therefore a new low-temperature heat preservation layer is newly arranged in the refrigeration house.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims

1. The utility model provides a low temperature freezer cooling system, including compressor (1), the high pressure table, high low pressure controller, the oil separator, condenser (2), the reservoir, the filter, the solenoid valve, expansion valve (3), evaporimeter (4), vapour and liquid separator, the low pressure table, compressor (1) is connected with the oil separator, the oil separator is connected with condenser (2), condenser (2) are connected with the reservoir, the reservoir is connected with the filter, the filter is connected with the expansion valve, the expansion valve is connected with the evaporimeter, the evaporimeter is connected with vapour and liquid separator, vapour and liquid separator is connected to compressor (1), the preceding high pressure table that is provided with of compressor (1), the rear end is provided with the meter that supports the pressure, still be provided with the solenoid valve on the pipeline, its characterized: the refrigeration house also comprises a refrigeration house shell, and high-low pressure controllers are connected and arranged at the front end and the rear end of the compressor (1); the condenser (2) is connected with a cooling tower, the refrigerating capacity of an expansion valve is selected to be 26KW, the lowest evaporation temperature is set to be 60 ℃ below zero, 8-9 fans with power of 500W are used for air supply of the evaporator (4), the fans are arranged in 2 rows, the fans arranged in the upper row and the lower row are respectively arranged in the blank between the two fans arranged in the same row, and R404A refrigerant is adopted by the system.

2. The cryogenic refrigerator cooling system of claim 1, wherein: the utility model discloses a refrigeration house, including freezer casing, air outlet, air inlet and air outlet, freezer casing sets up to square, and one side is provided with the computer lab, and system number equipment sets up in the computer lab, and the air intake and the air outlet of freezer set up both ends around freezer side wall body respectively, and freezer air outlet department is provided with the air intake of one section blank room as evaporimeter (4), and the freezer door sets up the air outlet department at the freezer.

3. The cryogenic refrigerator cooling system of claim 1, wherein: be provided with the light in the freezer casing, the light uses embedded LED lamp.

4. The cryogenic refrigerator cooling system of claim 1, wherein: a low-temperature heat-insulating layer is arranged in the cold storage.