阅读说明：本技术 喷射制冷系统及具有其的冰箱 (Jet refrigeration system and refrigerator with same ) 是由 刘建如 晏刚 李伟 聂圣源 姬立胜 于 2018-08-31 设计创作，主要内容包括：本发明提供了一种喷射制冷系统,包括压缩机,冷凝器,第一蒸发器,第二蒸发器及气液分离器,气液分离器包括气体出口,还包括喷射器,通道切换装置,第一节流装置及第二节流装置；喷射器包括工作流体入口及引射流体入口；压缩机,冷凝器及通道切换装置依次连接,通道切换装置将制冷剂回路分为第一制冷剂回路及第二制冷剂回路；第一制冷剂回路中,制冷剂依次流过第一节流装置,第一蒸发器,喷射器的工作流体入口及气液分离器的气体出口,并流回压缩机；第二制冷剂回路中,制冷剂依次流过第二节流装置,第二蒸发器,喷射器的引射流体入口及气液分离器的气体出口,并流回压缩机。本发明的喷射制冷系统,可减少压缩机的耗功,提高制冷系统的性能。(The invention provides an injection refrigeration system, which comprises a compressor, a condenser, a first evaporator, a second evaporator and a gas-liquid separator, wherein the gas-liquid separator comprises a gas outlet, an ejector, a channel switching device, a first throttling device and a second throttling device; the ejector comprises a working fluid inlet and an ejection fluid inlet; the compressor, the condenser and the channel switching device are sequentially connected, and the channel switching device divides the refrigerant loop into a first refrigerant loop and a second refrigerant loop; in the first refrigerant loop, the refrigerant flows through a first throttling device, a first evaporator, a working fluid inlet of the ejector and a gas outlet of the gas-liquid separator in sequence and flows back to the compressor; in the second refrigerant loop, the refrigerant flows through the second throttling device, the second evaporator, the injection fluid inlet of the ejector and the gas outlet of the gas-liquid separator in sequence and flows back to the compressor. The jet refrigeration system can reduce the power consumption of the compressor and improve the performance of the refrigeration system.)

1. An injection refrigeration system comprises a compressor, a condenser, a first evaporator, a second evaporator and a gas-liquid separator, wherein the gas-liquid separator comprises a gas outlet; the ejector comprises a working fluid inlet and an injection fluid inlet;

the compressor, the condenser and the channel switching device are sequentially connected, and the channel switching device divides the refrigerant loop into a first refrigerant loop and a second refrigerant loop;

in the first refrigerant circuit, the refrigerant flows through the first throttling device, the first evaporator, the working fluid inlet of the ejector and the gas outlet of the gas-liquid separator in sequence, and flows back to the compressor;

in the second refrigerant circuit, the refrigerant flows through the second throttling device, the second evaporator, the ejector fluid inlet of the ejector and the gas outlet of the gas-liquid separator in sequence and flows back to the compressor.

2. The ejector refrigeration system of claim 1, wherein the gas-liquid separator further comprises a liquid outlet; the refrigerant flowing out of the liquid outlet of the gas-liquid separator may sequentially pass through the third throttling means, the second evaporator, the ejector fluid inlet of the ejector and the gas outlet of the gas-liquid separator and flow back to the compressor.

3. A jet refrigeration system as claimed in claim 1, wherein said ejector further comprises a mixing chamber, a pressure-expansion chamber and a jet outlet in sequential communication, said working fluid inlet and said ejector fluid inlet each communicating with said mixing chamber, said refrigerant passing through said working fluid inlet and/or said ejector fluid inlet respectively and into said mixing chamber and pressure-expansion chamber and finally being ejected through said jet outlet.

4. The ejector refrigeration system of claim 2, further comprising a check valve disposed between the liquid outlet of the vapor-liquid separator and the second throttling device.

5. A spray refrigeration system as recited in claim 4 wherein said first evaporator is a refrigerated evaporator and said second evaporator is a refrigerated evaporator.

6. The ejector refrigeration system of claim 1, wherein said passage switching device is a solenoid valve.

7. A spray refrigeration system according to claim 1 wherein said first throttling means is a refrigeration capillary, said second throttling means is a first freeze capillary, and said third throttling means is a second freeze capillary.

8. A refrigerator, characterized by comprising:

the refrigerator comprises a box body, a first refrigerating chamber, a second refrigerating chamber and an injection refrigerating system, wherein the first refrigerating chamber, the second refrigerating chamber and the injection refrigerating system are arranged in the box body;

the jet refrigeration system comprises a compressor, a condenser, a first evaporator arranged in the first refrigeration chamber, a second evaporator arranged in the second refrigeration chamber, a gas-liquid separator, an ejector, a channel switching device, a first throttling device and a second throttling device, wherein the gas-liquid separator comprises a gas outlet; the ejector comprises a working fluid inlet and an injection fluid inlet;

the compressor, the condenser and the channel switching device are sequentially connected, and the channel switching device divides the refrigerant loop into a first refrigerant loop and a second refrigerant loop;

in the first refrigerant circuit, the refrigerant flows through the first throttling device, the first evaporator, the working fluid inlet of the ejector and the gas outlet of the gas-liquid separator, and flows back to the compressor;

in the first refrigerant circuit, the refrigerant flows through the second throttling device, the second evaporator, the ejector fluid inlet of the ejector and the gas outlet of the gas-liquid separator, and flows back to the compressor.

9. The refrigerator of claim 8, wherein the gas-liquid separator further comprises a liquid outlet; the refrigerant flowing out of the liquid outlet of the gas-liquid separator may sequentially flow through the second throttling device, the second evaporator, the ejector fluid inlet of the ejector, and the gas outlet of the gas-liquid separator and flow back to the compressor.

10. The refrigerator as claimed in claim 8, wherein the first refrigerating compartment is a refrigerating compartment, the second refrigerating compartment is a freezing compartment, the first evaporator is a refrigerating evaporator, and the second evaporator is a freezing evaporator.

Technical Field

The invention relates to a refrigerator, in particular to a jet refrigeration system and a refrigerator with the same.

Background

At present, the existing refrigerator generally adopts the traditional vapor compression refrigeration cycle, utilizes throttling parts such as a capillary tube or an expansion valve to realize the throttling process of a refrigerant, and for the circulation of a refrigerating chamber in a dual system, the refrigeration temperature of a refrigeration evaporator can reach-15 to-20 ℃ for maintaining the temperature of the refrigerating chamber at 1-9 ℃, the temperature difference between the two temperatures is very large, and a great part of cold energy waste can be caused. In addition, the refrigeration evaporator is required to reach the temperature of minus 20 ℃, the expansion work during throttling is large, a large part of the expansion work is lost, the whole refrigeration system is wasted, and part of irreversible loss is generated in the process, so that the energy efficiency of the refrigeration system is reduced.

Disclosure of Invention

The invention aims to provide an injection refrigeration system and a refrigerator with the same.

In order to achieve the above object, the present invention provides an injection refrigeration system, comprising a compressor, a condenser, a first evaporator, a second evaporator and a gas-liquid separator, wherein the gas-liquid separator comprises a gas outlet, and the injection refrigeration system is characterized by further comprising an injector, a channel switching device, a first throttling device and a second throttling device; the ejector comprises a working fluid inlet and an injection fluid inlet; the compressor, the condenser and the channel switching device are sequentially connected, and the channel switching device divides the refrigerant loop into a first refrigerant loop and a second refrigerant loop; in the first refrigerant circuit, the refrigerant flows through the first throttling device, the first evaporator, the working fluid inlet of the ejector and the gas outlet of the gas-liquid separator in sequence, and flows back to the compressor; in the second refrigerant circuit, the refrigerant flows through the second throttling device, the second evaporator, the ejector fluid inlet of the ejector and the gas outlet of the gas-liquid separator in sequence and flows back to the compressor.

As a further improvement of the present invention, the gas-liquid separator further comprises a liquid outlet; the refrigerant flowing out of the liquid outlet of the gas-liquid separator may sequentially pass through the third throttling means, the second evaporator, the ejector fluid inlet of the ejector and the gas outlet of the gas-liquid separator and flow back to the compressor.

As a further improvement of the present invention, the ejector further includes a mixing chamber, a pressure expansion chamber and an ejection outlet which are sequentially communicated, the working fluid inlet and the ejection fluid inlet are both communicated with the mixing chamber, and the refrigerant respectively passes through the working fluid inlet and/or the ejection fluid inlet, enters the mixing chamber and the pressure expansion chamber, and is finally ejected through the ejection outlet.

As a further improvement of the present invention, the ejector refrigeration system further comprises a check valve disposed between the liquid outlet of the gas-liquid separator and the second throttling means.

As a further improvement of the present invention, the first evaporator is a refrigerating evaporator, and the second evaporator is a freezing evaporator.

As a further improvement of the present invention, the passage switching device is an electromagnetic valve.

As a further improvement of the present invention, the first throttling device is a refrigeration capillary, the second throttling device is a first freezing capillary, and the third throttling device is a second freezing capillary.

Another aspect of the present invention also provides a refrigerator, including: the refrigerator comprises a box body, a first refrigerating chamber, a second refrigerating chamber and an injection refrigerating system, wherein the first refrigerating chamber, the second refrigerating chamber and the injection refrigerating system are arranged in the box body; the jet refrigeration system comprises a compressor, a condenser, a first evaporator arranged in the first refrigeration chamber, a second evaporator arranged in the second refrigeration chamber, a gas-liquid separator, an ejector, a channel switching device, a first throttling device and a second throttling device, wherein the gas-liquid separator comprises a gas outlet; the ejector comprises a working fluid inlet and an injection fluid inlet; the compressor, the condenser and the channel switching device are sequentially connected, and the channel switching device divides the refrigerant loop into a first refrigerant loop and a second refrigerant loop; in the first refrigerant circuit, the refrigerant flows through the first throttling device, the first evaporator, the working fluid inlet of the ejector and the gas outlet of the gas-liquid separator, and flows back to the compressor; in the first refrigerant circuit, the refrigerant flows through the second throttling device, the second evaporator, the ejector fluid inlet of the ejector and the gas outlet of the gas-liquid separator, and flows back to the compressor.

As a further improvement of the present invention, the gas-liquid separator further comprises a liquid outlet; the refrigerant flowing out of the liquid outlet of the gas-liquid separator may sequentially flow through the second throttling device, the second evaporator, the ejector fluid inlet of the ejector, and the gas outlet of the gas-liquid separator and flow back to the compressor.

As a further improvement of the present invention, the first refrigeration compartment is a refrigerating compartment, the second refrigeration compartment is a freezing compartment, the first evaporator is a refrigerating evaporator, and the second evaporator is a freezing evaporator.

Compared with the prior art, the ejector is arranged between the first evaporator and the gas-liquid separator, and the ejector can be used for recovering part of expansion work in the throttling process of the first throttling device, so that the power consumption of the compressor is reduced, and the performance of the vapor compression refrigeration system is effectively improved.

Drawings

Fig. 1 is a schematic view of a refrigeration cycle of an ejector refrigeration system according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of an ejector according to an embodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The present invention will be described in detail below with reference to embodiments shown in the drawings. However, these embodiments do not limit the present invention, and structural or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

It will be understood that terms used herein such as "upper," "above," "lower," "below," and the like, refer to relative positions in space and are used for convenience in description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

As shown in fig. 1-2, an embodiment of the present invention is described. The jet refrigeration system of the present invention is suitable for use in a dual system refrigerator. In the present embodiment, an ejector refrigeration system is disclosed, which includes a compressor 100, a condenser 200, a first evaporator 310, a second evaporator 320, and a gas-liquid separator 400, wherein the gas-liquid separator 400 includes a gas outlet 410, and further includes an ejector 500, a passage switching device, a first expansion throttling device, and a second expansion throttling device. The ejector 500 includes a working fluid inlet 510 and a motive fluid inlet 520. The compressor 100, the condenser 200, and the passage switching device are connected in this order, and the passage switching device divides the refrigerant circuit into a first refrigerant circuit and a second refrigerant circuit.

In the first refrigerant circuit, the refrigerant flows through the first throttling device 710, the first evaporator 310, the working fluid inlet 510 of the ejector 500 and the gas outlet 410 of the gas-liquid separator 400 in this order, and flows back to the compressor 100. In the first refrigerant circuit, the ejector can recover part of expansion work of the throttling process of the first throttling device so as to increase the suction pressure of the compressor, thereby improving the refrigeration efficiency of the system.

In the second refrigerant circuit, the refrigerant flows through the second throttling device, the second evaporator 320, the injection fluid inlet 520 of the ejector 500 and the gas outlet 410 of the gas-liquid separator 400 in this order, and flows back to the compressor 100. In the second refrigerant circuit, refrigeration of another temperature can be achieved, for example, when the first evaporator 310 is a refrigerating evaporator provided in a refrigerating chamber, and the second evaporator 320 can be a freezing evaporator provided in a freezing chamber, so that the purpose of refrigerating the freezing chamber is achieved when the refrigerant passes through the freezing evaporator.

According to the jet refrigeration system provided by the invention, the ejector is arranged between the first evaporator and the gas-liquid separator, and part of expansion work in the throttling process of the first throttling device can be recovered by using the ejector, so that the power consumption of the compressor is reduced, and the performance of the vapor compression refrigeration system is effectively improved.

In the present embodiment, the first evaporator 310 is a refrigerating evaporator, and the second evaporator 320 is a freezing evaporator.

Specifically, the passage switching device is a solenoid valve 600.

Preferably, the first throttling device is a refrigerating capillary tube 710, the second throttling device 820 is a first freezing capillary tube, and the third throttling device 830 is a second freezing capillary tube. In another embodiment, the expansion device may be an expansion valve or the like.

Further, the gas-liquid separator 400 further comprises a liquid outlet 420. The refrigerant flowing out of the liquid outlet 420 of the gas-liquid separator 400 may sequentially pass through the second throttling device 720, the second evaporator 320, the injection fluid inlet 520 of the ejector 500, and the gas outlet 410 of the gas-liquid separator 400, and flow back to the compressor 100. Specifically, in the first refrigerant circuit, the liquid refrigerant flowing out of the liquid outlet 420 of the gas-liquid separator 400 may enter the second evaporator 320 again, and when the second refrigerant circuit is not in operation, the refrigeration of the second evaporator 320 may be assisted.

The ejector refrigeration system further comprises a one-way valve 800, the one-way valve 800 being arranged between the liquid outlet 420 of the gas-liquid separator 400 and the second throttling device 820. The check valve 800 is provided such that the refrigerant can flow only from the liquid outlet 420 to the second evaporator 320 without flowing backward, thereby preventing the liquid refrigerant from flowing directly to the compressor 100 to damage the compressor 100 when the second refrigeration circuit is separately refrigerated.

As shown in fig. 2, the ejector 500 further includes a mixing chamber 530, a diffusion chamber 540 and an ejection outlet 550 which are sequentially communicated, the working fluid inlet 510 and the injection fluid inlet 520 are both communicated with the mixing chamber 530, and the refrigerant respectively passes through the working fluid inlet 510 and/or the injection fluid inlet 520 and enters the mixing chamber 530 and the diffusion chamber 540, and is finally ejected out through the ejection outlet 550

The operating principle of the injector 500 is: when the working fluid flows through the working fluid inlet 510, the static or thermal energy of the gas flow is converted to kinetic energy, and the working fluid forms a high velocity jet that creates a partial vacuum such that its pressure is lower than the pressure of the ejector fluid, which is ejected from the ejector fluid inlet 520 into the mixing chamber 530 by this pressure differential. Due to the turbulent diffusion effect of the jet flow boundary layer, the working fluid is mixed with the surrounding entrainment ejection fluid for energy exchange, the ejection fluid enters the mixing chamber 530 of the ejector 500 and then is accelerated under the action of the working steam, and the two streams of steam fluid gradually form a single uniform mixed fluid with a central pressure in the mixing chamber 530. The working fluid and the ejector fluid enter the mixing chamber 530 and undergo velocity equalization, typically with a pressure increase. Subsequently, the vapor fluid enters the pressure expansion chamber 540, the velocity is continuously reduced, the kinetic energy is continuously converted into static pressure energy, and the mixed fluid is decelerated and pressurized.

The ejector 500 plays a role in the system: the suction pressure of the compressor 100 is increased, and the compression ratio of the system compressor 100 is reduced, so that the purpose of reducing power consumption is achieved.

The invention also discloses a refrigerator which comprises a refrigerator body, a first refrigerating chamber, a second refrigerating chamber and an injection refrigerating system, wherein the first refrigerating chamber, the second refrigerating chamber and the injection refrigerating system are arranged in the refrigerator body. Specifically, the first refrigeration compartment is a refrigerating compartment, the second refrigeration compartment is a freezing compartment, the first evaporator is a refrigerating evaporator, and the second evaporator is a freezing evaporator.

A refrigerating cycle of the ejector refrigerating system in the entire refrigerator will be described in detail.

As shown in fig. 1, when the refrigerant enters the compressor 100, the low-pressure gaseous refrigerant (point 1) is compressed and then raised in pressure and temperature to become a high-temperature and high-pressure gaseous refrigerant (point 2), and after exiting the compressor 100, the high-temperature and high-pressure gaseous refrigerant is released and condensed in the condenser 200 to become a high-pressure supercooled liquid (point 3), and the supercooled liquid reaches the solenoid valve 600 from the point 3', and the refrigerant circuit is divided into a first refrigerant circuit and a second refrigerant circuit at the solenoid valve 600. In an embodiment of the invention, the first refrigerant circuit is operated independently in the cold storage branch and the second refrigerant circuit is operated independently in the cold storage branch. Different branches can be operated according to different control modes of the refrigerator.

When the refrigeration branch operates alone (i.e., in the first refrigerant circuit), all the refrigerants pass through the refrigeration capillary tube 710 by the electromagnetic valve 600, and the reduced-pressure and reduced-temperature refrigerants (4 points) enter the refrigeration evaporator 310 in a gas-liquid two-phase state through throttling and regenerative actions, and the refrigeration purpose of the refrigeration chamber is realized by heat absorption and evaporation at a higher evaporation temperature in the refrigeration evaporator 310.

The gas-liquid two-phase refrigerant (5 point) at the outlet of the refrigeration evaporator 310 enters the working fluid inlet 510 of the ejector 500 as working fluid, and is expanded and accelerated to become low-pressure high-speed gas-liquid two-phase refrigerant, a low-pressure region is formed in the mixing region of the ejector 500 (at this time, if the freezing branch and the refrigeration branch operate simultaneously, the working fluid further ejects the low-pressure gas-phase refrigerant (9 point) at the outlet of the freezing evaporator 320, the two flows are mixed in the mixing chamber of the ejector 500, and is decelerated and pressurized by the diffusion chamber to become medium-pressure gas-liquid two-phase refrigerant (6 point), then is discharged out of the ejector 500, and then enters the gas-liquid separator 400, and the saturated gas-phase refrigerant (1' point) separated from the gas-liquid separator 400 absorbs heat via the heat regenerator 900 and is heated.

When the freezing branch operates alone (i.e., in the second refrigerant loop), all the refrigerants pass through the first freezing capillary tube 820 by the electromagnetic valve 600, and enter the freezing evaporator 320 in a gas-liquid two-phase state through throttling and regenerative actions to realize the refrigerant (10 point) after pressure reduction and temperature reduction, and are evaporated, absorbed and evaporated in the freezing chamber evaporator 320 to realize the purpose of refrigerating the freezing chamber.

The low-pressure gaseous refrigerant (9 point) at the outlet of the refrigeration evaporator enters the ejector 500 from the injection fluid inlet 520, is subjected to speed reduction and pressurization by the diffusion chamber 540 to become a medium-pressure gas-liquid two-phase flow refrigerant (6 point), and then is discharged out of the ejector 500 and enters the gas-liquid separator 400, and the saturated gaseous refrigerant (1' point) separated from the gas-liquid separator 400 absorbs heat by the heat regenerator 900 and is heated up and then enters the inlet of the compressor 100, so that the primary cycle is completed.

Meanwhile, the saturated liquid refrigerant (point 7) separated from the gas-liquid separator 400 flows through the check valve 800, is reduced in pressure and temperature through the second freezing capillary tube 730 (point 8), and then enters the freezing evaporator 320 to absorb heat and evaporate at a lower evaporation temperature, thereby achieving the purpose of refrigerating the freezing chamber. Specifically, this freezing branch flowing through the second freezing capillary 730 functions to: during refrigeration, the liquid refrigerant separated from the gas-liquid separator 400 is throttled by the second freezing capillary tube 730 and evaporated in the freezing chamber evaporator 320, and the low-pressure gaseous refrigerant (9 o' clock) at the outlet of the freezing chamber evaporator 320 is sucked into the ejector 500 as a secondary fluid to play a role in assisting the refrigeration of the freezing chamber during refrigeration, thereby finally completing the whole cycle process.

Since the location where the function of the ejector 500 is effectively utilized is generally a place where the expansion work is large, the ejector 500 plays a large role in the branch of the refrigerating process in the case of the dual system refrigerator, and the ejector 500 is disposed at the outlet end of the refrigerating evaporator 310. In addition, in the double-system refrigerator, the freezing branch and the refrigerating branch refrigerate together in a small amount, and the normal condition only occurs in the power-on operation stage when the temperature is reduced to reach the temperature stabilization stage. After the temperature of the dual-system refrigerator is stable (i.e. most of the states of the refrigerator in use), which is usually the case that the freezing branch and the refrigerating branch are separately operated, the refrigerating branch or the freezing branch (the branch passing through the first freezing capillary 720) is independently closed, the entire system can be operated without influence.

According to the jet refrigeration system provided by the invention, the ejector is arranged between the first evaporator and the gas-liquid separator, and part of expansion work in the throttling process of the first throttling device can be recovered by using the ejector, so that the power consumption of the compressor is reduced, and the performance of the vapor compression refrigeration system is effectively improved.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.