CN112796996A

CN112796996A - Scroll compressor

Info

Publication number: CN112796996A
Application number: CN202110027631.2A
Authority: CN
Inventors: 王作林; 邱韦淇; 王星棋; 王一然
Original assignee: Qingdao Tengyuan Design Institute Co Ltd
Current assignee: Qingdao Tengyuan Design Institute Co Ltd
Priority date: 2021-01-10
Filing date: 2021-01-10
Publication date: 2021-05-14
Anticipated expiration: 2041-01-10
Also published as: CN112796996B

Abstract

The invention relates to the technical field of compressor devices, in particular to a scroll compressor, wherein an exhaust port is arranged on the side wall of a compressor body, a first air suction port at the top of the compressor body is connected with a first evaporator, the exhaust port is connected with a condenser, a first expansion valve is connected between the first evaporator and the condenser, the bottom end of the first air suction port is connected with the outer end of a spiral cavity of a fixed scroll, the top end of a second air suction port is connected with a second evaporator through a pipeline, the air inlet end of the second evaporator is connected with a second expansion valve, the air inlet end of the second expansion valve is connected with the exhaust end of the condenser, the top of a valve box device is connected with the bottom end of the second air suction port, a plurality of branch pipes are arranged in parallel in an inner cavity of the valve box device, the top ends of the branch pipes are respectively communicated with the bottom end of the second air suction port, the bottom ends; the problem that a single compressor cannot provide refrigerants with multiple parameters at the same time is solved.

Description

Scroll compressor

Technical Field

The invention relates to the technical field of compressor devices, in particular to a scroll compressor.

Background

With the development of economy and society and the improvement of living standard of people, people have higher and higher requirements on the comfort in buildings. In the building indoor environment construction process, not only indoor air needs to be heated or cooled to meet indoor temperature requirements, but also fresh air needs to be conveyed to the interior of the building so as to meet the requirement of human bodies on air freshness. However, in the design process of the air conditioning system, outdoor fresh air generally needs to be cooled or heated before being sent to the indoor environment, so that the influence of the fresh air on the indoor temperature environment is reduced, and a fresh air processor is often required to be arranged to process the fresh air. At present, the same cold source is adopted in most buildings to process fresh air, namely, the same air conditioner host provides refrigerant or secondary refrigerant with the same parameter to process indoor air and fresh air, and the processing mode is simpler but not energy-saving. Because the temperature operating mode of new trend is generally more abominable than indoor temperature operating mode, adopt the high temperature cold source to handle new trend and can improve entire system's operating efficiency, promote the energy-conservation nature of system (the evaporation temperature of cold source is higher, and coefficient of performance is higher, more energy-conserving). The other mode is to arrange two sets of air conditioner hosts, wherein one set of air conditioner hosts is specially used for treating indoor air, and the other set of air conditioner hosts is specially used for treating fresh air, so that the evaporation temperature of the set of air conditioner hosts for treating the fresh air can be increased, and the energy conservation in operation is realized. However, this method has a high initial cost and a complicated system. Therefore, it is desirable to provide a scroll compressor to provide two kinds of refrigerant parameters simultaneously in the same refrigeration system, so as to reduce the operation cost while reducing the initial cost.

Disclosure of Invention

The invention aims to provide a scroll compressor, which is used for solving the problem that a single compressor cannot simultaneously provide refrigerants with multiple parameters at present.

In order to achieve the purpose, the invention provides the following technical scheme: a scroll compressor comprises a compressor body, a static scroll and a dynamic scroll are arranged at the top end of the inner cavity of the compressor body in a matching way, the side wall of the compressor body is provided with an exhaust port, the top of the compressor body is provided with a first air suction port, the top end of the first air inlet is connected with a first evaporator through a pipeline, the air outlet is connected with a condenser through a pipeline, a first expansion valve is connected between the first evaporator and the condenser, and the evaporator further comprises a second air suction port, a valve box device, a second evaporator and a second expansion valve, the bottom end of the first air suction port is connected with the outer end of the spiral cavity of the fixed scroll, the top end of the second air suction port is connected with a second evaporator through a pipeline, the input end of the second evaporator is connected with a second expansion valve, and the input end of the second expansion valve is connected with the output end of the condenser;

the top of the valve box device is connected with the bottom end of the second air suction port, a plurality of branch pipes are arranged in parallel in the inner cavity of the valve box device, the top ends of the branch pipes are respectively communicated with the bottom end of the second air suction port, the bottom ends of the branch pipes are respectively connected with different positions of the spiral cavity of the fixed scroll, and electromagnetic valves are respectively arranged in the middle of the branch pipes.

Preferably, the first evaporator is used for an indoor air treatment system, and the second evaporator is used for a fresh air system.

Preferably, the first evaporator and the second evaporator are respectively provided with a control device for detecting an evaporation pressure.

Preferably, the output end of the control device arranged on the second evaporator is electrically connected with the input end of the electromagnetic valve respectively.

Preferably, the number of the branch pipes is three, and the three branch pipes are sequentially communicated with the spiral chamber of the fixed scroll from outside to inside.

Preferably, the opening degree of the first expansion valve is different from the opening degree of the second expansion valve.

Preferably, the top end of the compressor body is provided with a plurality of second air suction ports, and the bottom end of each second air suction port is provided with a valve box device.

Compared with the prior art, the invention has the beneficial effects that:

1. the compressor can be connected with evaporators in various working conditions to realize the working conditions of various evaporation temperatures, so that the evaporation pressure of the evaporator for processing fresh air is increased, and the compressor has important significance in energy conservation.

2. In the compressor system, the compressor can better adapt to the change of fresh air temperature working conditions through the arrangement of the valve box device.

3. The compressor system realizes the operation mode of one compressor and multiple evaporation working conditions, and avoids the situation that a plurality of compressors are required to be configured for realizing multiple evaporation working conditions in the prior art.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a schematic diagram of the energy saving mechanism of the present invention.

In the figure: 100-a compressor body; 101-a fixed scroll; 102-a moving scroll; 103-an exhaust port; 104-a first suction port; 105-a second suction opening; 200-a valve cartridge device; 201-branch pipe; 202-electromagnetic valve; 300-a condenser; 400-a first evaporator; 401-a first expansion valve; 500-a second evaporator; 501-second expansion valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1, the present invention provides a technical solution, a scroll compressor, including a compressor body 100, a fixed scroll 101 and a movable scroll 102 are disposed at the top end of an inner cavity of the compressor body 100 in a matching manner, a side wall of the compressor body 100 is provided with an exhaust port 103, a first air intake port 104 is disposed at the top of the compressor body 100, the top end of the first air intake port 104 is connected to a first evaporator 400 through a pipeline, the exhaust port 103 is connected to a condenser 300 through a pipeline, a first expansion valve 401 is connected between the first evaporator 400 and the condenser 300, the scroll compressor further includes a second air intake port 105, a valve box device 200, a second evaporator 500 and a second expansion valve 501, the bottom end of the first air intake port 104 is connected to the outer end of a spiral cavity of the fixed scroll 101, the top end of the second air intake port 105 is connected to the second evaporator 500 through a pipeline, the input end of, the input end of the second expansion valve 501 is connected with the output end of the condenser 300;

the top of the valve box device 200 is connected with the bottom end of the second air inlet 105, three branch pipes 201 are arranged in parallel in the inner cavity of the valve box device 200, the three branch pipes 201 are sequentially communicated with the spiral cavity of the fixed scroll 101 from outside to inside, the top ends of the branch pipes 201 are respectively communicated with the bottom end of the second air inlet 105, and electromagnetic valves 202 are respectively arranged in the middle of the branch pipes 201.

In this embodiment, the first evaporator 400 is used in an indoor air treatment system, and the second evaporator 500 is used in a fresh air system.

In this embodiment, the first evaporator 400 and the second evaporator 500 are respectively provided with a control device for detecting the evaporation pressure, and the output end of the control device of the second evaporator 500 is respectively electrically connected to the input end of the electromagnetic valve 202.

In this embodiment, the opening degree of the first expansion valve 401 is different from the opening degree of the second expansion valve 501.

In this embodiment, the valve box device 200 may be disposed in an inner cavity of the top shell of the compressor body 100, and the valve box device 200 is required to have a high temperature resistance property; the valve box apparatus 200 may be disposed outside the compressor body 100 as long as the branch pipe 201 is connected to the spiral cavity chamber of the fixed scroll 101 at a proper position.

In summary, the compression mechanisms of the compressor body 100 are the fixed scroll 101 and the orbiting scroll 102, and the orbiting scroll 102 rotates to compress the refrigerant, so that the refrigerant sucked into the first suction port 104 and the second suction port 105 is changed into a high-temperature and high-pressure refrigerant, and is discharged from the discharge port 103; from the edge of the scroll assembly to the center of the scroll assembly, the pressure of the refrigerant is different, and the closer to the center, the higher the pressure is; the cavity within the scroll assembly, from the outside to the inside, may thus be defined as a low pressure chamber, a medium pressure chamber, and a high pressure chamber. The outlet of the first evaporator 400 is connected to the first suction port 104, the low-temperature and low-pressure refrigerant gas from the first evaporator 400 enters the low-pressure chamber of the compressor body 100 through the first suction port 104, is compressed to medium pressure, and then is mixed with the low-temperature and medium-pressure refrigerant gas from the second evaporator 500 in the medium-pressure chamber (the low-temperature and medium-pressure refrigerant gas of the second evaporator 500 enters the medium-pressure chamber of the compressor body 100 from the second suction port 105), and then they are compressed into high-temperature and high-pressure refrigerant gas, and discharged from the discharge port 103 of the compressor body 100 to the condenser 300 to condense and release heat, and become low-temperature and high-pressure refrigerant liquid; then the refrigerant liquid is divided into two paths: one path of refrigerant is throttled by a first expansion valve 401, becomes low-temperature and low-pressure refrigerant liquid, enters a first evaporator 400, absorbs heat of indoor air, is evaporated into low-temperature and low-pressure refrigerant vapor, and then enters a first air suction port 104 of the compressor body 100; the other path of refrigerant liquid is throttled into low-temperature medium-pressure refrigerant liquid by a second expansion valve 501, enters a second evaporator 500, is changed into low-temperature medium-pressure refrigerant gas after absorbing the heat of fresh air, and then enters a second air suction port 105 of the compressor body 100; thus, two circulation loops are formed by continuous circulation.

In addition, in the using process of the air conditioner, the general indoor working condition is relatively stable, namely the evaporation pressure fluctuation range of the refrigerant in the first evaporator 400 is not large; however, the second evaporator 500 is used for processing fresh air, and the temperature fluctuation of the fresh air is severe in one day and one week; therefore, the range of the evaporation pressure fluctuation of the second evaporator 500 is very large, and in order to ensure the normal operation of the refrigeration cycle, it is necessary to ensure that the refrigerant in the second evaporator 500 can enter a proper chamber in the scroll assembly in the compressor body 100 (the pressures of different chambers in the scroll assembly are different, and it is necessary to ensure that the evaporation pressure in the second evaporator 500 matches with the working pressure of the chamber entering through the second suction port 105), so that the evaporation pressure in the second evaporator 500 is detected by the control device, and the electromagnetic valve 202 on the branch pipe 201 of the matching chamber in the valve box apparatus 200 is opened after the judgment is made; so that the refrigerant gas in the second evaporator 500 can be sent into a suitable chamber.

The energy-saving mechanism is as follows: in the process of the refrigeration cycle, under the condition that other conditions are not changed, the evaporation temperature is increased, and the operation energy efficiency of the system is favorably improved. Because the temperature conditions of the air processed by the second evaporator 500 and the first evaporator 400 are different (the temperature of the indoor air processed by the first evaporator 400 is about 25 ℃, the temperature of the outdoor air processed by the second evaporator 500 is much worse than that of the indoor air, and sometimes the outdoor temperature reaches 35 ℃ or even 40 ℃), the indoor air can be processed by the low-temperature refrigerant, and the fresh air can be processed by the medium-temperature refrigerant. Therefore, although the evaporation temperature of the refrigerant for processing the indoor air part is unchanged, the evaporation temperature of the refrigerant for processing the fresh air can be greatly increased, and the improvement of the overall operation efficiency is realized. As shown in fig. 2, the pressure-enthalpy diagram of the refrigeration cycle is that the high-temperature and high-pressure refrigerant gas (state 5) discharged from the compressor body 100 is condensed in the condenser and releases heat, and then is changed from state 5 to state 6 (low-temperature and high-pressure liquid), and then is divided into two paths, wherein one path is throttled to state 8 (low-temperature and low-pressure liquid) by the first expansion valve 401; the other path is throttled to state 7 (low-temperature medium-pressure liquid) by the second expansion valve 501, the two paths of refrigerants respectively enter the corresponding suction ports of the compressor body 100 after the first evaporator 400 absorbs the heat of indoor air and the second evaporator 500 absorbs the heat of fresh air, the refrigerant (state 1) at the outlet of the first evaporator 400 enters the first suction port 104 of the compressor body 100, then is compressed to state 2, then is mixed with the refrigerant (state 3) from the second evaporator 500 in the medium-pressure cavity of the compressor to be in state 4, and then is continuously compressed by the compressor body 100 to be in state 5.

In the second embodiment, referring to fig. 1, on the basis of the first embodiment, a plurality of second suction ports 105 are disposed at the top end of the compressor body 100, and a valve box device 200 is disposed at the bottom end of each second suction port 105; each second air suction port 105 is respectively connected with a second evaporator 500 and a second expansion valve 501 in sequence, and the input end of the second expansion valve 501 is respectively connected with the output end of the condenser 300; thereby enabling a single compressor body 100 to provide multiple evaporation conditions simultaneously.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The scroll compressor comprises a compressor body (100), wherein a fixed scroll (101) and a movable scroll (102) are arranged at the top end of an inner cavity of the compressor body (100) in a matched manner, an exhaust port (103) is arranged on the side wall of the compressor body (100), a first air suction port (104) is arranged at the top of the compressor body (100), a first evaporator (400) is connected to the top end of the first air suction port (104) through a pipeline, a condenser (300) is connected to the exhaust port (103) through a pipeline, and a first expansion valve (401) is connected between the first evaporator (400) and the condenser (300), and the scroll compressor is characterized by further comprising:

a second air inlet (105);

a cage assembly (200);

a second evaporator (500) and

the bottom end of the first air suction port (104) is connected with the outer end of the spiral cavity of the fixed scroll (101), the top end of the second air suction port (105) is connected with a second evaporator (500) through a pipeline, the input end of the second evaporator (500) is connected with the second expansion valve (501), and the input end of the second expansion valve (501) is connected with the output end of the condenser (300);

the top of the valve box device (200) is connected with the bottom end of the second air suction port (105), a plurality of branch pipes (201) are arranged in parallel in an inner cavity of the valve box device (200), the top ends of the branch pipes (201) are respectively communicated with the bottom end of the second air suction port (105), the bottom ends of the branch pipes (201) are respectively connected with different positions of the spiral cavity of the fixed scroll (101), and electromagnetic valves (202) are respectively arranged in the middle of the branch pipes (201).

2. A scroll compressor as recited in claim 1, wherein: the first evaporator (400) is used for an indoor air treatment system, and the second evaporator (500) is used for a fresh air system.

3. A scroll compressor as claimed in claim 2, wherein: the first evaporator (400) and the second evaporator (500) are respectively provided with a control device for detecting evaporation pressure.

4. A scroll compressor as claimed in claim 3, wherein: the output end of the control device arranged on the second evaporator (500) is respectively electrically connected with the input end of the electromagnetic valve (202).

5. A scroll compressor as recited in claim 1, wherein: the number of the branch pipes (201) is three, and the three branch pipes (201) are sequentially communicated with the spiral cavity of the fixed scroll (101) from outside to inside.

6. A scroll compressor as recited in claim 1, wherein: the opening degree of the first expansion valve (401) is different from the opening degree of the second expansion valve (501).

7. A scroll compressor as recited in claim 1, wherein: the top end of the compressor body (100) is provided with a plurality of second air suction ports (105), and the bottom end of each second air suction port (105) is provided with a valve box device (200) respectively.