阅读说明：本技术 桶泵制冷系统 (Barrel pump refrigerating system ) 是由 罗祥坤 唐睿 吉常斌 陆考灵 黎泽明 于 2020-12-14 设计创作，主要内容包括：一种桶泵制冷系统,包括：依次循环连接的储液桶、第一泵和第一蒸发器,形成第一循环；第一泵为氟泵；第一压力调节阀、压缩机、冷凝器,储液桶、第一压力调节阀、压缩机和冷凝器依次循环连接,形成第二循环。本发明通过桶泵制冷系统的设计,能够在第一蒸发器形成15℃以上的蒸发温度,使得在高温高湿的工况下,制冷系统不会自发产生冗余除湿,能够防止空气湿度过低,从而避免大量加湿补偿,降低了试验室运行能耗。(A barrel pump refrigeration system comprising: the liquid storage barrel, the first pump and the first evaporator are sequentially connected in a circulating manner to form a first circulation; the first pump is a fluorine pump; first pressure regulating valve, compressor, condenser, stock solution bucket, first pressure regulating valve, compressor and condenser are cyclic connection in proper order, form the second circulation. According to the invention, through the design of the barrel pump refrigerating system, the evaporating temperature of more than 15 ℃ can be formed in the first evaporator, so that the refrigerating system can not spontaneously generate redundant dehumidification under the working condition of high temperature and high humidity, and the over-low air humidity can be prevented, thereby avoiding a large amount of humidification compensation and reducing the energy consumption of the laboratory operation.)

1. A barrel pump refrigeration system, comprising:

the liquid storage barrel, the first pump and the first evaporator are sequentially connected in a circulating manner to form a first circulation; the first pump is a fluorine pump;

first pressure regulating valve, compressor, condenser, stock solution bucket, first pressure regulating valve, compressor and condenser are cyclic connection in proper order, form the second circulation.

2. The barrel pump refrigeration system as recited in claim 1 further comprising:

an expansion valve disposed between the first pump and the evaporator;

a second valve connected in parallel at both ends of the expansion valve;

a first valve disposed between the first evaporator and the compressor, and the first valve is located between the first cycle and the second cycle; and

a third valve having a first end connected to the first pressure regulating valve and a second end connected between the first valve and the compressor.

3. The barrel pump refrigeration system as recited in claim 1 wherein said first cycle further comprises a one-way valve disposed between said first evaporator and said reservoir.

4. The barrel pump refrigeration system as claimed in claim 1, wherein the opening of the first pressure regulating valve is set to be regulated according to an inlet pressure of the compressor.

5. The barrel pump refrigeration system as claimed in claim 1, further comprising a second pressure regulating valve connected between the outlet of the condenser and the reservoir barrel, the degree of opening of which is set to be adjusted according to the pressure of the condenser.

6. The barrel pump refrigeration system as claimed in claim 1 further comprising a hot gas bypass valve connected between the inlet of the condenser and the reservoir, the opening of which is arranged to be adjusted in accordance with the pressure of the reservoir.

7. The barrel pump refrigeration system as recited in claim 1 further comprising an oil separator connected after the compressor.

8. The barrel pump refrigeration system as claimed in any one of claims 1 to 7, further comprising a second pump and a second evaporator, wherein the liquid storage barrel, the second pump and the second evaporator are sequentially connected in a circulating manner.

9. The barrel pump refrigeration system according to any of claims 1 to 7, wherein the rotational speed of the first pump is set to be adjusted according to the temperature of the second heat exchanging side of the first evaporator.

10. The barrel pump refrigeration system as claimed in claim 8, wherein the rotational speed of the second pump is set to be adjusted according to the temperature of the second heat exchange side of the second evaporator.

Technical Field

The invention relates to a barrel pump refrigeration system.

Background

The existing barrel pump refrigerating system has a small temperature control range, can not be freely switched between low-temperature circulation and high-temperature circulation, and can not meet various working condition requirements of a laboratory.

Disclosure of Invention

According to one aspect of the present invention, there is provided a barrel pump refrigeration system comprising:

the liquid storage barrel, the first pump and the first evaporator are sequentially connected in a circulating manner to form a first circulation; the first pump is a fluorine pump;

first pressure regulating valve, compressor, condenser, stock solution bucket, first pressure regulating valve, compressor and condenser are cyclic connection in proper order, form the second circulation.

According to the invention, through the design of the barrel pump refrigerating system, the evaporating temperature of more than 15 ℃ can be formed in the first evaporator, so that the refrigerating system can not spontaneously generate redundant dehumidification under the working condition of high temperature and high humidity, and the over-low air humidity can be prevented, thereby avoiding a large amount of humidification compensation and reducing the energy consumption of the laboratory operation.

In some embodiments, the barrel pump refrigeration system further comprises:

an expansion valve disposed between the first pump and the evaporator;

a second valve connected in parallel at both ends of the expansion valve;

a first valve disposed between the first evaporator and the compressor, and the first valve is located between the first cycle and the second cycle; and

and a third valve, a first end of which is connected with the first pressure regulating valve, and a second end of which is connected between the first valve and the compressor.

In some embodiments, the first cycle further comprises a one-way valve disposed between the first evaporator and the reservoir.

In some embodiments, the opening degree of the first pressure regulating valve is set to be adjusted according to an inlet pressure of the compressor.

In some embodiments, the barrel pump refrigeration system further comprises a second pressure regulating valve connected between the outlet of the condenser and the reservoir barrel, the degree of opening of which is set to be adjusted according to the pressure of the condenser.

In some embodiments, the barrel pump refrigeration system further comprises a hot gas bypass valve connected between the inlet of the condenser and the reservoir, the degree of opening of which is configured to be adjusted according to the pressure of the reservoir.

In some embodiments, the barrel pump refrigeration system further includes an oil separator connected after the compressor. In some embodiments, the barrel pump refrigeration system further comprises a second pump and a second evaporator, and the liquid storage barrel, the second pump and the second evaporator are sequentially connected in a circulating manner.

In some embodiments, the rotational speed of the first pump is set to be adjusted according to the temperature of the second heat exchanging side of the first evaporator.

In some embodiments, the rotational speed of the second pump is set to be adjusted according to the temperature of the second heat exchanging side of the second evaporator.

Drawings

FIG. 1 is a schematic diagram of a barrel pump refrigeration system according to some embodiments of the present invention;

figure 2 is a schematic diagram of an energy efficient enthalpy difference laboratory according to some embodiments of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Figure 2 schematically illustrates an energy efficient enthalpy difference laboratory according to some embodiments of the present invention including a barrel pump refrigeration system, an outdoor test booth 3, an indoor test booth 4, an outdoor side air handler 5, an indoor side air handler 6, an outdoor side temperature and humidity control system, and an indoor side temperature and humidity control system. The barrel pump refrigerating system can also be applied to the application environment of temperature and humidity tests outside an air-conditioning laboratory.

Referring to fig. 1, the drum pump refrigeration system includes a liquid storage drum 11, a first pump 12, an expansion valve 13, a second valve 14, a first evaporator 15, a first valve 16, a check valve 17, a third valve 18, a first pressure regulating valve 19, a second pressure regulating valve 20, a compressor 21, an oil separator 22, a condenser 23, and a hot gas bypass valve 24. Wherein the opening degree of the first pressure regulating valve 19 is set to be adjusted according to the inlet pressure of the compressor, and the opening degree of the second pressure regulating valve 20 is set to be adjusted according to the pressure of the condenser 23.

The liquid side of the reservoir 11, the first pump 12, the expansion valve 13, the first heat exchange side of the first evaporator 15, the first valve 16, the compressor 21, the oil separator 22, the condenser 23, the second pressure regulating valve 20, and the gas side of the reservoir 11 are connected in this order, forming a low-temperature cycle. The second valve 14 is connected in parallel to both ends of the expansion valve 13, the outlet of the evaporator is connected to the gas side of the receiver 11 through the check valve 17, the compressor 21, the third valve 18, the first pressure regulating valve 19 and the gas side of the receiver 11 are connected in sequence, and the hot gas bypass valve 24 is disposed between the inlet of the condenser 23 and the gas side of the receiver 11 for increasing the temperature and pressure of the refrigerant in the receiver 11 by bypassing the hot gas at the outlet of the compressor 21 to the receiver 11. The hot gas bypass valve 24 may be a regulating valve whose opening degree is set to be regulated according to the pressure of the reservoir. The first valve 16, the second valve 14, and the third valve 18 may be on-off valves.

When low-temperature circulation is performed, the second valve 14 is closed, the first valve 16 is opened, and the third valve 18 is closed, so that the liquid side of the liquid storage barrel 11, the first pump 12, the expansion valve 13, the first heat exchange side of the first evaporator 15, the first valve 16, the compressor 21, the oil separator 22, the condenser 23, the second pressure regulating valve 20, and the gas side of the liquid storage barrel 11 are sequentially communicated, and the evaporation temperature range of the first evaporator 15 is about-10 ℃ to-40 ℃.

When carrying out the high temperature cycle, second valve 14 opens, first valve 16 closes, third valve 18 opens, the liquid side of stock solution bucket 11, first pump 12, second valve 14, first evaporimeter 15, the gaseous side of check valve 17 and stock solution bucket 11 communicates in proper order, form first circulation, first evaporimeter 15 absorbs heat, make refrigerant temperature and pressure in the stock solution bucket 11 promote, through this phase transition circulation, can realize the evaporating temperature more than 15 ℃, make under the operating mode of high temperature and high humidity, refrigerating system can not produce redundancy dehumidification voluntarily, can prevent that air humidity from crossing lowly, thereby avoid a large amount of humidification compensations, the laboratory operation energy consumption has been reduced. Meanwhile, the gas side of the liquid storage barrel 11, the first pressure regulating valve 19, the third valve 18, the compressor 21, the oil separator 22, the condenser 23, the second pressure regulating valve 20 and the gas side of the liquid storage barrel 11 are sequentially communicated to form a second cycle, and the condenser 23 radiates heat, so that the temperature and pressure of the refrigerant in the liquid storage barrel 11 are reduced. The evaporation temperature of the first evaporator 15 ranges from about 0 c to about 40 c.

During the medium temperature cycle, the second valve 14 is closed, the first valve 16 is opened, the third valve 18 is opened, the liquid side of the receiver 11, the first pump 12, the expansion valve 13, the first heat exchanging side of the first evaporator 15, the first valve 16, the compressor 21, the oil separator 22, the condenser 23, the second pressure regulating valve 20, and the gas side of the receiver 11 are sequentially communicated, and the refrigerant gas is supplied from the receiver 11 through the branch where the third valve 18 is located. The evaporation temperature of the first evaporator 15 ranges from about-15 c to about 5 c.

Referring to fig. 2, in some embodiments, the first cycle of the receiver-pump-evaporator-receiver may be provided in plurality, that is, in addition to the above-mentioned cycle of the receiver 11-first pump 12-first evaporator 15-receiver 11, a similar cycle may be provided, for example, the barrel pump refrigeration system may further include a second pump 25 and a second evaporator 26, the liquid side of the receiver 11, the second pump 25, the first heat exchange side of the second evaporator 26 and the gas side of the receiver 11 are sequentially connected to form another first cycle, and form another high temperature cycle together with the second cycle, and the second evaporator 26 absorbs heat, so that the temperature and pressure of the refrigerant in the receiver 11 are raised.

Referring to fig. 2, in some embodiments, the barrel pump refrigeration system may further include a fourth valve 27 connected in series with the expansion valve 13, and the fourth valve 27 may be an on-off valve operable to close the cycle associated with the first evaporator 15.

Referring to fig. 2, the barrel pump refrigeration system can be applied to an energy-saving enthalpy difference laboratory.

The outdoor test chamber 3 is used for simulating the outdoor environment temperature of the air conditioner. In the outdoor test chamber 3, the second heat exchange side of the first evaporator 15 exchanges heat with the air in the outdoor test chamber 3 through the outdoor air handler 5, so as to adjust the air temperature in the outdoor test chamber 3, so that the outdoor test chamber 3 can select from three modes, namely a low-temperature cycle mode, a medium-temperature cycle mode and a high-temperature cycle mode, and realize temperature adjustment in a wide range.

The outdoor temperature and humidity control system comprises an outdoor humidity sensor, an outdoor humidifier, an outdoor temperature sensor and an outdoor electric heater 7 which are arranged in the outdoor test room 3.

The outdoor humidifier may be an ultrasonic humidifier which performs humidity adjustment according to the reading of the outdoor humidity sensor. Compared with the traditional electrically heated steam humidifier, the energy-saving enthalpy difference test chamber has the advantages that the additional heat cannot be introduced into the test chamber, and the additional heat is balanced, so that the energy consumption of the test chamber in operation is reduced. Preferably, the ultrasonic humidifier includes an ultrasonic fogging unit and a contactless switching element for controlling the ultrasonic fogging unit, and the contactless switching element controls a control period of the ultrasonic fogging unit to be 5s or less, so that accurate humidity adjustment can be achieved in an energy-saving enthalpy difference test room. The contactless switch element is specifically a solid-state relay, an IGBT module, a silicon controlled module, a diode module, a flat silicon module or a rectifier bridge, and the solid-state relay is adopted in the embodiment.

The outdoor side electric heater 7 is used for heating the air of the outdoor test chamber 3 according to the reading of the outdoor side temperature sensor. The rotation speed of the first pump 12 is set to be changed according to the reading of the outdoor side temperature sensor, thereby changing the refrigerant circulation flow rate, and further changing the temperature of the second heat exchanging side of the first evaporator 15, thereby cooling the air of the outdoor test chamber 3.

The indoor test chamber 4 is used for simulating the indoor environment temperature of the air conditioner. In this indoor test booth 4, the second heat exchange side of the second evaporator 26 exchanges heat with the air of the indoor test booth 4 through the indoor air handler 6, so that the air temperature of the indoor test booth 4 is adjusted, and the indoor test booth 4 can realize temperature adjustment in a high temperature cycle mode.

The indoor temperature and humidity control system comprises an indoor humidity sensor, an indoor humidifier, an indoor temperature sensor and an indoor electric heater 8 which are arranged in the indoor test room 4.

The indoor humidifier may be an ultrasonic humidifier that adjusts humidity based on readings from an indoor humidity sensor. Compared with the traditional electrically heated steam humidifier, the energy-saving enthalpy difference test chamber has the advantages that the additional heat cannot be introduced into the test chamber, and the additional heat is balanced, so that the energy consumption of the test chamber in operation is reduced. Preferably, the ultrasonic humidifier includes an ultrasonic fogging unit and a contactless switching element for controlling the ultrasonic fogging unit, and the contactless switching element controls a control period of the ultrasonic fogging unit to be 5s or less, so that accurate humidity adjustment can be achieved in an energy-saving enthalpy difference test room. The contactless switch element is specifically a solid-state relay, an IGBT module, a silicon controlled module, a diode module, a flat silicon module or a rectifier bridge, and the solid-state relay is adopted in the embodiment.

The indoor side electric heater 8 is used for heating the air of the indoor test room 4 according to the reading of the indoor side temperature sensor. The rotational speed of the second pump 25 is set to be changed according to the reading of the indoor side temperature sensor, thereby changing the refrigerant circulation flow rate, and further changing the temperature of the second heat exchange side of the second evaporator 26, thereby cooling the air of the indoor test room 4.

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made, or combinations of the above-described embodiments can be made, without departing from the spirit of the invention, and all such changes and modifications, including combinations of features of the various embodiments described above, are within the scope of the invention.