CN211552132U

CN211552132U - Refrigeration heating temperature control system operating all year round under high-temperature environment

Info

Publication number: CN211552132U
Application number: CN202020113322.8U
Authority: CN
Inventors: 颜厥枝
Original assignee: Wuxi Guanya Constant Temperature Refrigeration Technology Co ltd
Current assignee: Wuxi Guanya Constant Temperature Refrigeration Technology Co ltd
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-09-22
Anticipated expiration: 2030-01-19

Abstract

The utility model discloses a refrigeration heating temperature control system of high temperature environment operation all the year round, its structure includes two sets of the same and all with the circulation system that the expansion tank is connected, and connect two sets of the same and the same refrigerating system who connects same air-cooled condenser of two sets of circulation systems respectively. The utility model has the advantages that: the structure is compact and reasonable, the operation and the use are convenient, and the linear cooling of the refrigerator to the low-temperature section can be realized under the high-temperature working condition; the high-temperature water cooling auxiliary function is added, so that the requirement of refrigerating in summer in a high-temperature area is met; the safety performance is very high, the risk of frost cracking of the condenser is avoided under the condition of low temperature, the condensing temperature is easy to adjust, and normal refrigeration can be realized under the very low environment; the cooling device has the function of high-temperature rapid cooling, and increases the liquid supply amount when directly refrigerating from high temperature; the multi-point operation and model-free self-tree-building algorithm can be adopted, and the temperature control of a large-lag system is specially aimed at, so that the temperature of a lag target value can be controlled within +/-1 ℃ in a constant temperature manner.

Description

Refrigeration heating temperature control system operating all year round under high-temperature environment

Technical Field

The utility model relates to a refrigeration heating temperature control system who moves all year round under the high temperature environment.

Background

In areas with higher temperature in summer, when a refrigerating unit of the air-cooled condenser is adopted, the refrigerating efficiency is often very low due to overhigh condensing temperature, and for low-temperature equipment, the temperature is difficult to drop, and the compressor is often burnt out due to long-time high-load work. Therefore, water-cooled condensers are adopted by a plurality of manufacturers in many times, the water-cooled condensers have many working advantages in summer but have many troubles, and pure water-cooled condensers need to be matched with a whole set of cooling facilities comprising a cooling tower, a circulating pump, a water replenishing pump, a circulating pipeline, a filter, a valve and the like, so that the early investment is large, the later maintenance cost is high, the occupied area is large, and the cost performance is low for small-sized equipment. In winter, because the temperature is lower, if cooling water flow can not be effectively adjusted, the condensing pressure of the refrigerating system is too low, so that the whole refrigerating system is low-pressure to alarm, and the normal work can not be realized. When the refrigerating unit does not operate for a long time, the cooling water stops circulating, and if the cooling water accumulated in the circulating pipeline and the condenser cannot be discharged in time or the cooling water cannot be discharged completely, ice is formed in the cooling water, so that the condenser and the circulating pipeline are cracked, and finally serious irretrievable economic loss is caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a refrigeration heating temperature control system who moves all year round under the high temperature environment, its purpose aims at overcoming the above-mentioned not enough that prior art exists, realizes high reliability and high energy efficiency ratio, for the user saves earlier stage input and later maintenance cost.

The technical solution of the utility model is as follows: the refrigerating and heating temperature control system which operates in high temperature environment all year round structurally comprises two sets of identical circulating systems which are connected with an expansion tank and two sets of identical refrigerating systems which are respectively connected with the two sets of circulating systems and are connected with the same air-cooled condenser,

the circulating system comprises an expansion tank, a gas-liquid separator, an evaporator and a heating pipe, wherein the top of the expansion tank is connected with the top of the gas-liquid separator through a pipeline with an exhaust stop valve, the side surface of the gas-liquid separator is connected with a heat-conducting medium inlet pipe, the bottom of the expansion tank is connected with the side surface of the gas-liquid separator through a pipeline with a one-way valve, the bottom of the expansion tank is also connected with a pipeline between the one-way valve and the gas-liquid separator through a pipeline, the bottom of the gas-liquid separator is sequentially connected with a circulating pump, a first passage of the evaporator and the heating pipe through pipelines, the heating pipe is connected with;

the refrigerating system comprises a compressor and an oil separator, the oil separator comprises a water-cooling auxiliary condenser, a drying filter and a heat regenerator, wherein a compressor is respectively connected with the top and the bottom of the oil separator through pipelines, the top of the oil separator is connected with an air-cooling condenser through a pipeline, the air-cooling condenser is connected with a first passage of the water-cooling auxiliary condenser through a pipeline, the first passage of the water-cooling auxiliary condenser is connected with the drying filter through a pipeline, a second passage of the water-cooling auxiliary condenser is respectively connected with a cooling water inlet pipe and a cooling water outlet pipe, the drying filter is connected with the first passage of the heat regenerator through a pipeline with an expansion valve, an auxiliary pipeline with an auxiliary liquid supply electromagnetic valve and a throttling capillary tube is further connected between pipelines on two sides of the expansion valve, the first passage of the heat regenerator is connected with a second passage of an evaporator through a pipeline, the second passage of the evaporator is connected with.

Preferably, a liquid level meter is arranged in the expansion tank, and a liquid filling port is arranged at the top of the expansion tank.

Preferably, an oil-filled low-pressure meter and a low-pressure switch are arranged on a pipeline between the compressor and the heat regenerator, and an oil-filled high-pressure meter and a high-pressure switch are arranged on a pipeline between the compressor and the oil separator.

Preferably, the heating pipe is a U-shaped light pipe, and the heating pipe is connected with the three-phase voltage regulator and the mechanical temperature protection switch.

The utility model has the advantages that: 1) the structure is compact and reasonable, the operation and the use are convenient, and the refrigerating machine can be linearly cooled to a low-temperature section under the working condition of high temperature (-25-200 ℃);

2) the high-temperature water-cooling auxiliary function is added, under the condition of higher environment temperature, the condensing efficiency of the air-cooled condenser is linearly reduced, and the complete liquefaction of high-temperature and high-pressure refrigerant gas cannot be ensured, so that the refrigerating efficiency is greatly reduced, and the normal refrigerating requirement cannot be met;

3) the water cooling auxiliary function is closed under the condition of low temperature, the risk of frost crack of the condenser is avoided, the condensing temperature is easy to adjust, the rotating speed of the condensing fan is controlled through the condensing pressure, and normal refrigeration can be realized under the low environment;

4) the cooling auxiliary electromagnetic valve is opened to increase the liquid supply amount when the refrigeration is directly carried out from high temperature;

5) the multi-point operation and model-free self-tree-building algorithm can be adopted, and the temperature control of a large-lag system is specially aimed at, so that the temperature of a lag target value can be controlled within +/-1 ℃ in a constant temperature manner, and the up-down frequent fluctuation is avoided.

Drawings

Fig. 1 is a schematic structural diagram of a refrigeration and heating temperature control system operating all year round in a high-temperature environment.

In the figure, 1 is an expansion tank, 101 is an exhaust stop valve, 102 is a check valve, 2 is a gas-liquid separator, 201 is a circulation pump, 3 is an evaporator, 4 is a heating pipe, 5 is an air-cooled condenser, 6 is a compressor, 7 is an oil separator, 8 is a water-cooled auxiliary condenser, 9 is a dry filter, 10 is an auxiliary liquid supply electromagnetic valve, and 11 is a regenerator.

Detailed Description

The present invention will be described in further detail with reference to examples and embodiments.

As shown in fig. 1, the refrigeration heating temperature control system operating in a high temperature environment all year round structurally comprises two sets of identical circulating systems which are connected with an expansion tank 1, and two sets of identical refrigeration systems which are respectively connected with the two sets of circulating systems and are connected with the same air-cooled condenser 5.

The circulation system include expansion tank 1, vapour and liquid separator 2, evaporimeter 3 and heating pipe 4, 1 top of expansion tank is through the 2 tops of pipe connection vapour and liquid separator of taking exhaust stop valve 101, the heat-conducting medium advances the pipe is connected to 2 sides of vapour and liquid separator, 1 bottom of expansion tank is through the 2 sides of pipe connection vapour and liquid separator of taking

check valve

102, 1 bottom of expansion tank is still through the pipeline between pipe connection check valve 102 and the vapour and liquid separator 2, 2 bottoms of vapour and liquid separator connect gradually circulating pump 201 through the pipeline, 3 first passageways of evaporimeter and heating pipe 4, heat-conducting medium exit tube is connected to heating pipe 4, heat-conducting medium advances to manage and all be equipped with temperature sensor on the heating pipe 4 respectively.

Two liquid level meters are arranged in the expansion tank 1, and a liquid filling opening is arranged at the top of the expansion tank.

The circulating system is a fully-closed system, oil mist does not exist at high temperature, moisture in air is not absorbed at low temperature, pressure cannot rise due to high temperature during operation of the system, and heat-conducting media are automatically supplemented at low temperature.

The heat conducting oil filling of the circulating system comprises the following steps: the heat conducting oil is injected into the expansion tank 1, the exhaust stop valve 101 is opened, the internal circulating pump 201 is opened, the heat conducting oil is pumped into the system from the expansion tank 1, meanwhile, air in the system is discharged, the air in the system is continuously discharged through the continuous injection of the heat conducting oil, and the exhaust stop valve 101 is closed until most air in the system is discharged. So as to form a circulating system without contacting with air. (the first exhaust may have a little residual air in the system, which is carried out along the expansion process through several temperature raising and lowering processes.)

After the equipment is started, the circulating pump 201 can always run, the temperature of the medium outlet is detected through the temperature sensor arranged on the circulating pipeline, so that the running of the refrigeration compressor is controlled, and meanwhile, the output proportion of the electric heating pipe 4 is adjusted through the three-phase voltage regulator, so that the accurate temperature control is realized.

The refrigerating system comprises a compressor 6, an oil separator 7, a water-cooling auxiliary condenser 8, a drying filter 9 and a heat regenerator 11, wherein the compressor 6 is respectively connected with the top and the bottom of the oil separator 7 through pipelines, the top of the oil separator 7 is connected with an air-cooling condenser 5 through a pipeline, the air-cooling condenser 5 is connected with a first passage of the water-cooling auxiliary condenser 8 through a pipeline, the first passage of the water-cooling auxiliary condenser 8 is connected with the drying filter 9 through a pipeline, a second passage of the water-cooling auxiliary condenser 8 is respectively connected with a cooling water inlet pipe and a cooling water outlet pipe, the drying filter 9 is connected with a first passage of the heat regenerator 11 through a pipeline with an expansion valve, an auxiliary passage with an auxiliary passage liquid supply electromagnetic valve 10 and a throttling capillary tube is further connected between pipelines at two sides of the expansion valve, the first passage of the heat regenerator 11 is connected with a second passage of an evaporator 3 through a pipeline, the second path of regenerator 11 is connected to compressor 6 via a conduit.

An oil-filled low-pressure meter and a low-pressure switch are arranged on a pipeline between the compressor 6 and the heat regenerator 11, and an oil-filled high-pressure meter and a high-pressure switch are arranged on a pipeline between the compressor 6 and the oil separator 7.

In the refrigeration mode, a compressor 6 operates to compress a gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, a freezing oil carried in refrigerant steam is separated by an oil separator 7, the gaseous refrigerant returns to the compressor 6 through an oil return pipe, then the gaseous refrigerant is condensed into a high-pressure liquid refrigerant through an air-cooled condenser 5, the ambient temperature is detected through a temperature sensor, when the ambient temperature is higher than a set value, a water-cooling auxiliary function is started, the refrigerant coming out of the air-cooled condenser 5 enters a water-cooling auxiliary condenser 8 to be continuously condensed, when the ambient temperature is lower than the set value, the water-cooling auxiliary function is closed, the high-pressure liquid refrigerant filters impurities and water through a drying filter 9, the liquid refrigerant enters a throttling device, when the refrigerant is directly refrigerated from high temperature, an auxiliary path liquid supply electromagnetic valve 10 is opened, the main path simultaneously supplies liquid to a heat regenerator 11 and an evaporator, the auxiliary path liquid supply electromagnetic valve 10 is closed. The refrigerating system is provided with a high-temperature heat regenerator 11, the throttled liquid refrigerant firstly passes through the heat regenerator 11 and is evaporated in the heat regenerator 11 to exchange heat with the gaseous refrigerant from the evaporator 3, and the return temperature of the compressor 6 is ensured not to be overhigh.

The heating pipe 4 is a U-shaped light pipe, and the heating pipe 4 is connected with a three-phase voltage regulator and a mechanical temperature protection switch.

In the heating mode, the heating pipe 4 is arranged in the liquid storage tank by adopting a U-shaped light pipe, the output proportion of heating power is adjusted by a three-phase voltage regulator according to a set temperature value, and the heating pipe 4 is effectively prevented from being burnt by dryness due to the mechanical temperature protection switch.

All the above components are prior art, and those skilled in the art can use any model and existing design that can implement their corresponding functions.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.

Claims

1. The refrigerating and heating temperature control system which operates in high temperature environment all year round is characterized by comprising two sets of same circulating systems which are connected with an expansion tank (1) and two sets of same refrigerating systems which are respectively connected with the two sets of circulating systems and are connected with the same air-cooled condenser (5),

the circulating system comprises an expansion tank (1), a gas-liquid separator (2), an evaporator (3) and a heating pipe (4), wherein the top of the expansion tank (1) is connected with the top of the gas-liquid separator (2) through a pipeline with an exhaust stop valve (101), the side surface of the gas-liquid separator (2) is connected with a heat-conducting medium inlet pipe, the bottom of the expansion tank (1) is connected with the side surface of the gas-liquid separator (2) through a pipeline with a one-way valve (102), the bottom of the expansion tank (1) is also connected with a pipeline between the one-way valve (102) and the gas-liquid separator (2) through a pipeline, the bottom of the gas-liquid separator (2) is sequentially connected with a circulating pump (201), a first passage of the evaporator (3) and the heating pipe (4) through pipelines, the heating pipe (4) is connected with a heat-conducting medium;

the refrigeration system comprises a compressor (6), an oil separator (7), a water-cooling auxiliary condenser (8), a drying filter (9) and a heat regenerator (11), wherein the compressor (6) is respectively connected with the top and the bottom of the oil separator (7) through pipelines, the top of the oil separator (7) is connected with an air-cooling condenser (5) through pipelines, the air-cooling condenser (5) is connected with a first passage of the water-cooling auxiliary condenser (8) through a pipeline, the first passage of the water-cooling auxiliary condenser (8) is connected with the drying filter (9) through a pipeline, a second passage of the water-cooling auxiliary condenser (8) is respectively connected with a cooling water inlet pipe and a cooling water outlet pipe, the drying filter (9) is connected with the first passage of the heat regenerator (11) through a pipeline with an expansion valve, and an auxiliary pipeline with an auxiliary liquid supply electromagnetic valve (10) and a throttling capillary tube is, the first passage of the heat regenerator (11) is connected with the second passage of the evaporator (3) through a pipeline, the second passage of the evaporator (3) is connected with the second passage of the heat regenerator (11) through a pipeline, and the second passage of the heat regenerator (11) is connected with the compressor (6) through a pipeline.

2. The refrigerating and heating temperature control system operating in high temperature environment all year round as claimed in claim 1, characterized in that the expansion tank (1) is internally provided with a liquid level meter and the top is provided with a liquid filling port.

3. The refrigerating and heating temperature control system operating in high temperature environment all year round as claimed in claim 1, characterized in that an oil-filled low-pressure meter and a low-pressure switch are arranged on the pipeline between the compressor (6) and the heat regenerator (11), and an oil-filled high-pressure meter and a high-pressure switch are arranged on the pipeline between the compressor (6) and the oil separator (7).

4. The system according to claim 1, wherein the heating pipe (4) is a U-shaped light pipe, and the heating pipe (4) is connected to a three-phase voltage regulator and a mechanical temperature protection switch.