CN218033805U

CN218033805U - High-temperature enthalpy-increasing parallel refrigerating system

Info

Publication number: CN218033805U
Application number: CN202222056946.2U
Authority: CN
Inventors: 吴正茂; 阎树冬; 王尚龙; 潘长耀
Original assignee: Panasonic Appliances Refrigeration System Dalian Co Ltd
Current assignee: Bingshan Songyang Refrigerator System Dalian Co ltd
Priority date: 2022-08-05
Filing date: 2022-08-05
Publication date: 2022-12-13
Anticipated expiration: 2032-08-05

Abstract

The utility model discloses parallelly connected refrigerating system of high temperature enthalpy increase relates to refrigeration plant technical field, especially relates to a parallelly connected refrigerating system of high temperature enthalpy increase. The output ends of the scroll compressor and the piston compressors A and B of the utility model are connected in parallel and then enter the oil separator to realize oil-gas separation; the output end of the oil separator is connected with a condenser through a connector I, and the condenser is connected with the input end of a liquid storage device through a connector II; the output end of the liquid storage device is connected with the input end of the condensing side of the plate heat exchanger through a liquid supply drying filter and a liquid path liquid sight glass; the output end of the condensation side of the plate heat exchanger is connected with the tail end equipment through a connector III, and the tail end equipment is connected with the input end of the gas-liquid separator A through a connector IV; the output end of the evaporation side of the plate heat exchanger is connected with the input end of the gas-liquid separator B; the output end of the gas-liquid separator A is respectively connected with the input end of the piston compressor A B; the output end of the gas-liquid separator B is connected with the input end of the scroll compressor.

Description

High-temperature enthalpy-increasing parallel refrigerating system

Technical Field

The utility model discloses parallelly connected refrigerating system of high temperature enthalpy increase relates to refrigeration plant technical field, especially relates to a parallelly connected refrigerating system of high temperature enthalpy increase.

Background

With the concern of people on environmental problems and global climate problems, the carbon peak is realized, the carbon neutralization target is also the responsibility and obligation of the refrigeration industry, and the refrigeration equipment is of great importance in improving energy efficiency, reducing energy consumption and reducing carbon emission.

Aiming at the problems in the prior art, a novel high-temperature enthalpy-increasing parallel refrigeration system is researched and designed, so that the problem in the prior art is very necessary to be solved.

Disclosure of Invention

According to the prior art, in order to improve the energy efficiency of the freezing and refrigerating equipment, reduce the energy consumption and reduce the carbon emission, the high-temperature enthalpy-increasing parallel refrigerating system is provided. The utility model discloses mainly adopt scroll compressor and piston compressor multimachine to connect in parallel, realize the energy regulation, utilize the high evaporating temperature supercooling of high energy efficiency low energy efficiency's low evaporating temperature's of high evaporating temperature system to supply liquid simultaneously to increase substantially entire system efficiency.

The utility model discloses a technical means as follows:

a high temperature enthalpy-increasing parallel refrigeration system includes: the system comprises a scroll compressor, a piston compressor A, a piston compressor B, an oil separator, a liquid storage device, a liquid supply drying filter, a liquid path liquid viewing mirror, a plate type heat exchanger, a gas-liquid separator A and a gas-liquid separator B;

furthermore, two or more than two kinds of evaporation pressure are combined by one scroll compressor and two piston compressors A and B on the high-temperature enthalpy-increasing parallel refrigeration system;

furthermore, the output ends of the scroll compressor, the piston compressor A and the piston compressor B are connected in parallel and then enter the oil separator to realize oil-gas separation;

furthermore, the output end of the oil separator is connected with a condenser through a connector I, and the condenser is connected with the input end of the liquid reservoir through a connector II;

furthermore, the output end of the liquid storage device is connected with the input end of the condensation side of the plate heat exchanger through a liquid supply drying filter and a liquid path liquid sight glass;

furthermore, the output end of the condensation side of the plate heat exchanger is connected with a terminal device through a connector III, and the terminal device is connected with the input end of the gas-liquid separator A through a connector IV; the output end of the evaporation side of the plate heat exchanger is connected with the input end of the gas-liquid separator B;

furthermore, the output end of the gas-liquid separator A is respectively connected with the input ends of the piston compressor A and the piston compressor B;

further, the output end of the gas-liquid separator B is connected with the input end of the scroll compressor.

Furthermore, a branch is separated from a pipeline on which the liquid path sight glass is connected with the input end of the condensation side of the plate heat exchanger, and the branch is connected with the input end of the evaporation side of the plate heat exchanger after passing through the electromagnetic valve A and the electronic expansion valve.

Furthermore, the lubricating oil output end of the oil separator is connected with the input end of the oil collector;

further, the output end of the oil collector is respectively connected with an electronic oil balance, a mechanical oil balance A and a mechanical oil balance B through an oil path filter;

further, the electronic oil balance, the mechanical oil balance A and the mechanical oil balance B are respectively connected with lubricating oil inlets of the scroll compressor, the piston compressor A and the piston compressor B to provide lubricating oil for the compressors.

Furthermore, one path led out from the upper part of the oil collector is divided into two paths after passing through an oil path differential pressure check valve, one path is connected with the inlet end of the gas-liquid separator A through the electromagnetic valve B, and the other path is connected with the inlet end of the gas-liquid separator B through the electromagnetic valve C.

Furthermore, a temperature sensor is arranged on a connecting pipeline between the output end of the condensation side of the plate heat exchanger and the interface III.

Further, a reservoir safety valve is arranged on the reservoir.

Compared with the prior art, the utility model has the advantages of it is following:

1. the high-temperature enthalpy-increasing parallel refrigerating system provided by the utility model generates two or more than two kinds of evaporating pressures on the same refrigerating device;

2. the utility model provides a high temperature enthalpy-increasing parallel refrigerating system, which utilizes the high evaporation temperature supercooling low energy efficiency low evaporation temperature system liquid supply with high energy efficiency, thereby greatly improving the energy efficiency of the whole system;

3. the high-temperature enthalpy-increasing parallel refrigerating system provided by the utility model adopts the parallel connection of a plurality of vortex and piston compressors, wherein one compressor with smaller refrigerating capacity is used for cooling the liquid after the system is condensed;

4. the utility model provides a high temperature enthalpy-increasing parallel refrigeration system, the pressure in the oil collector is conducted to 2 groups of low-pressure ends, and the switching is carried out under different working conditions, so as to ensure the oil supply of the unit;

5. the high-temperature enthalpy-increasing parallel refrigeration system provided by the utility model adopts the multi-machine parallel connection of the vortex compressor and the piston compressor, and the machine set can realize energy adjustment;

6. the utility model provides a high temperature enthalpy-increasing parallel refrigeration system, which adopts a plurality of parallel scroll compressors and piston compressors, and can adjust the opening of an expansion valve according to the end load condition because of the high efficiency of the scroll compressor and the refrigerating capacity of a plate heat exchanger controlled by an electronic expansion valve, thereby realizing the purposes of reducing the liquid supply temperature, improving the refrigerating capacity and improving the unit performance;

7. the high-temperature enthalpy-increasing parallel refrigeration system provided by the utility model has the advantages that multiple units are connected in parallel, so that energy adjustment and control are realized accurately, the cooling speed is high, and the energy consumption is low; the system is stable in work, energy-saving and environment-friendly, and is a set of high-energy-efficiency multi-compressor parallel refrigeration system of the scroll piston compressor.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a diagram of the refrigeration cycle system of the present invention.

In the figure: 1. the device comprises a scroll compressor 2, a piston compressor A3, a piston compressor B4, an electronic oil balance 5, a mechanical oil balance A6, a mechanical oil balance B7, an oil separator 8, a reservoir 9, a reservoir safety valve 10, a liquid supply drying filter 11, a liquid path liquid viewing mirror 12, a plate type heat exchanger 13, a temperature sensor 14, a gas-liquid separator A15, a solenoid valve A16, an electronic expansion valve 17, a gas-liquid separator B18, an oil collector 19, an oil path filter 20, an oil path differential pressure check valve 21, a solenoid valve B22 and a solenoid valve C.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in figure 1, the utility model provides a high temperature enthalpy-increasing parallel refrigerating system, the unit of the utility model is installed in a machine room, interfaces I and II are connected with a condenser, and interfaces III and IV are connected with a terminal cold device; the unit supplies high-temperature and high-pressure refrigerant gas to the condenser through the interface I, condenses into medium-temperature and high-pressure liquid in the condenser, and then returns to the unit liquid storage device 8 through the interface II; the unit provides medium-temperature high-pressure refrigerant liquid for the tail end equipment through the interface III, and the medium-temperature high-pressure refrigerant liquid returns to the gas-liquid separator A14 of the unit through the interface IV after being throttled, evaporated and absorbed by a tail end expansion valve and an evaporator;

as shown in fig. 1, when the high-temperature enthalpy-increasing parallel refrigeration system works, an external condenser and a terminal evaporation heat exchanger (not included in the system) are required. The scroll compressor 1, the piston compressor A2 and the piston compressor B3 compress the refrigerant gas returned by the gas-liquid separator, the refrigerant gas is compressed into high-temperature and high-pressure refrigerant gas, and the refrigerant gas enters the oil separator 7 to realize oil-gas separation; the separated refrigerant gas enters a condenser from a connector I to be condensed to become a liquid refrigerant, and then enters a liquid storage device 8 from a connector II; the liquid refrigerant in the liquid storage device 8 enters a plate heat exchanger 12 through a liquid supply drying filter 10 and a liquid path liquid viewing mirror 11 to be further cooled and cooled, then enters a terminal device through a connector III to be evaporated and refrigerated, and returns to piston compressors A2 and B3 through a gas-liquid separator A14 to enter a compression-condensation-throttling-evaporation refrigeration cycle again after evaporation and heat absorption. The liquid refrigerant enters the evaporation side of the plate heat exchanger 12 to evaporate and absorb heat (exchange heat with the liquid refrigerant at the condensation side) after passing through the electromagnetic valve A15 and the electronic expansion valve 16 in a branch path before entering the condensation side of the plate heat exchanger 12, and then enters the scroll compressor 1 to participate in the recirculation. The lubricating oil separated in the oil separator 7 enters each compressor for lubrication through an oil path filter 19, an electronic oil balance 4 and mechanical oil balances A5 and B6. The pressure in the oil collector 18 is communicated with the gas-liquid separators A14 and B17 through electromagnetic valves B21 and C22 after an oil way differential pressure check valve 20, and the oil supply stability of the scroll compressor 1 and the piston compressors A2 and B3 is ensured by switching the on-off of the electromagnetic valves B21 and C22, so that the unit can run stably.

The high-temperature enthalpy-increasing parallel refrigeration system adopts a plurality of parallel scroll and piston compressors, so that energy adjustment can be realized; the electronic expansion valve is controlled to make the supercooling degree of the liquid supply larger, increase the enthalpy difference, improve the refrigerating output and improve the energy efficiency of the unit.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A high-temperature enthalpy-increasing parallel refrigerating system is characterized in that:

the high-temperature enthalpy-increasing parallel refrigerating system comprises: the device comprises a scroll compressor (1), a piston compressor A (2), a piston compressor B (3), an oil separator (7), a liquid storage device (8), a liquid supply drying filter (10), a liquid path liquid viewing mirror (11), a plate type heat exchanger (12), a gas-liquid separator A (14) and a gas-liquid separator B (17);

the output ends of the scroll compressor (1), the piston compressor A (2) and the piston compressor B (3) are connected in parallel and then enter the oil separator (7) to realize oil-gas separation;

the output end of the oil separator (7) is connected with a condenser through a connector I, and the condenser is connected with the input end of a liquid reservoir (8) through a connector II;

the output end of the liquid storage device (8) is connected with the input end of the condensation side of the plate type heat exchanger (12) through a liquid supply drying filter (10) and a liquid path liquid sight glass (11);

the output end of the condensation side of the plate heat exchanger (12) is connected with a terminal device through a connector III, and the terminal device is connected with the input end of a gas-liquid separator A (14) through a connector IV; the output end of the evaporation side of the plate heat exchanger (12) is connected with the input end of a gas-liquid separator B (17);

the output end of the gas-liquid separator A (14) is respectively connected with the input ends of the piston compressor A (2) and the piston compressor B (3);

the output end of the gas-liquid separator B (17) is connected with the input end of the scroll compressor (1).

2. The high-temperature enthalpy-increasing parallel refrigeration system according to claim 1, characterized in that:

a branch is separated from a pipeline on which the liquid path liquid viewing mirror (11) is connected with the input end of the condensation side of the plate heat exchanger (12), and the branch is connected with the input end of the evaporation side of the plate heat exchanger (12) after passing through an electromagnetic valve A (15) and an electronic expansion valve (16).

3. The high-temperature enthalpy-increasing parallel refrigeration system according to claim 1, characterized in that:

the lubricating oil output end of the oil separator (7) is connected with the input end of the oil collector (18);

the output end of the oil collector (18) is respectively connected with the electronic oil balance (4), the mechanical oil balance A (5) and the mechanical oil balance B (6) through an oil way filter (19);

and the electronic oil balance (4), the mechanical oil balance A (5) and the mechanical oil balance B (6) are respectively connected with lubricating oil inlets of the scroll compressor (1), the piston compressor A (2) and the piston compressor B (3) to provide lubricating oil for each compressor.

4. The high-temperature enthalpy-increasing parallel refrigerating system according to claim 3, characterized in that:

one path led out from the upper part of the oil collector (18) is divided into two paths after passing through an oil path differential pressure check valve (20), one path is connected with the inlet end of a gas-liquid separator A (14) through an electromagnetic valve B (21), and the other path is connected with the inlet end of a gas-liquid separator B (17) through an electromagnetic valve C (22).

5. The high-temperature enthalpy-increasing parallel refrigeration system according to claim 2, characterized in that:

and a temperature sensor (13) is arranged on a connecting pipeline between the output end of the condensation side of the plate heat exchanger (12) and the interface III.

6. The high-temperature enthalpy-increasing parallel refrigeration system according to claim 1, characterized in that:

and a reservoir safety valve (9) is arranged on the reservoir (8).