CN113405284A

CN113405284A - Refrigerating system and refrigerator

Info

Publication number: CN113405284A
Application number: CN202110738403.6A
Authority: CN
Inventors: 李霄; 魏星
Original assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-09-17
Also published as: WO2023273495A1

Abstract

The invention provides a refrigeration system and a refrigerator. Refrigerating system includes compressor, condenser, throttling arrangement and evaporimeter, and it forms circulation circuit through the pipe connection, still includes: a pressure regulating device, which is connected into the circulation loop and is positioned between the condenser and the throttling device, and is configured to: when the refrigeration system is operated, the refrigerant is in a conducting state allowing the refrigerant to pass through; after the refrigeration system is shut down, the system is switched to a blocking state to block the flow of the high-pressure refrigerant on the condenser side to the throttling device. The refrigerating system of the invention can rapidly enter a refrigerating state after being started.

Description

Refrigerating system and refrigerator

Technical Field

The invention relates to the technical field of refrigeration, in particular to a refrigeration system and a refrigerator.

Background

Refrigeration equipment such as refrigerators and air conditioners generally performs refrigeration by using a vapor compression refrigeration cycle in which refrigeration components such as a compressor, a condenser, a throttle device, and an evaporator are connected by a pipeline to form a refrigerant circulation circuit.

When the refrigeration system is in operation, the refrigerant pressure at the condenser is higher and the refrigerant pressure at the evaporator is lower. After the refrigerating system is shut down, the refrigerant on the high-pressure side of the condenser flows to the low-pressure side of the evaporator through the throttling device, so that the pressures of the condenser and the evaporator gradually tend to be balanced. At the next start-up, the compressor is restarted, reestablishing the condenser high pressure and the evaporator low pressure. Therefore, during a period of time when the compressor is started, the refrigerant is transferred from the evaporator to the condenser to establish high and low pressure difference, and the system has no refrigeration effect during the period of time, so that the compressor does no work.

Disclosure of Invention

The present invention is directed to solve at least one of the above-mentioned drawbacks of the prior art, and to provide a refrigeration system and a refrigerator capable of entering a refrigeration state quickly after being turned on.

In one aspect, the present invention provides a refrigeration system, including a compressor, a condenser, a throttling device, and an evaporator, which are connected by a pipeline to form a circulation loop, further including:

a pressure regulating device connected to the circulation loop and located between the condenser and the throttling device, and configured to:

when the refrigeration system is operated, the refrigerant is in a conducting state allowing refrigerant to pass through;

after the refrigeration system is shut down, switching to a blocking state to block the flow of the high-pressure refrigerant on the condenser side to the throttling device.

Optionally, the pressure regulating device comprises a shut-off valve located between the condenser and the throttling device;

the refrigeration system is configured to place the shutoff valve in an open state when the refrigeration system is started up; after shutdown, the shut-off valve is switched to a closed state.

Optionally, the pressure regulating device comprises:

a first valve located between the condenser and the throttling device; and

a first refrigerant collecting tank having a second valve for controlling the inflow/outflow of refrigerant, the second valve being communicated between the condenser and the first valve;

the refrigeration system is configured to: when the power-on operation is carried out, the first valve is opened, and the second valve is closed; after shutdown, the first valve is closed and the second valve is opened to introduce refrigerant into the first refrigerant collection tank.

Optionally, the pressure regulating device further comprises: a third valve located between the condenser and the second valve.

Optionally, the first valve, the second valve and the third valve are integrated into an integral valve.

Optionally, the pressure regulating device comprises:

the stop valve is positioned between the condenser and the throttling device; and

the inlet end of the second refrigerant collecting tank is communicated with the condenser, and the outlet end of the second refrigerant collecting tank is communicated with the stop valve;

the refrigeration system is configured to place the shutoff valve in an open state when the refrigeration system is started up; and after the machine is stopped, the stop valve is switched to a closed state, so that the refrigerant flows into the second refrigerant collecting tank.

Optionally, a filter screen is disposed in the second refrigerant collecting tank.

Optionally, the pressure regulating device is arranged adjacent to the condenser.

Optionally, the restriction is a capillary tube.

In another aspect, the invention also provides a refrigerator comprising a refrigeration system as described in any one of the above.

In the refrigeration system of the invention, a pressure regulating device is arranged between the condenser and the throttling device. When the refrigerating system is operated, the refrigerant can normally flow through the pressure regulating device; when the refrigerating system is stopped, the pressure regulating device blocks the passage between the condenser and the throttling device, and blocks the high-pressure refrigerant on the condenser side from flowing to the throttling device, so that the refrigerant of the condenser is kept in a high-pressure state, the low-pressure refrigerant on the evaporator side is kept in a low-pressure state, and a certain pressure difference is kept between the condenser and the throttling device. Therefore, when the refrigeration system is restarted, the refrigeration system can rapidly enter a refrigeration state due to the pressure difference existing in the system, the waiting time is saved, and the power consumption loss of the original waiting time is also saved.

Further, in the refrigeration system of the present invention, the pressure adjustment device may include a first valve and a first refrigerant collection tank. After the refrigeration system is shut down, the first refrigerant collecting tank can contain a part of high-pressure refrigerant, so that the situation that the pressure and the temperature of the condenser are too high, the exhaust pressure and the exhaust temperature are too high when the compressor is started again is avoided, the service life of the compressor is prolonged, and the power of the compressor is reduced.

Furthermore, in the refrigeration system, the filter screen is arranged in the second refrigerant collecting tank, and when the refrigeration system normally operates, the second refrigerant collecting tank can play a role of a filter, so that the filter does not need to be additionally arranged, and the system cost is saved.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a cycle diagram of a refrigeration system according to one embodiment of the present invention;

FIG. 2 is a cycle diagram of a refrigeration system according to another embodiment of the present invention;

FIG. 3 is a cycle diagram of a refrigeration system according to yet another embodiment of the present invention;

fig. 4 is a schematic block diagram of a refrigerator according to an embodiment of the present invention.

Detailed Description

A refrigeration system and a refrigerator according to an embodiment of the present invention will be described with reference to fig. 1 to 4. In the description of the present embodiments, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature, i.e., one or more such features. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. When a feature "comprises or comprises" a or some of its intended features, this indicates that other features are not excluded and that other features may be further included, unless expressly stated otherwise.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and "coupled" and the like are to be construed broadly and can, for example, be fixedly connected or detachably connected or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. Those skilled in the art should understand the specific meaning of the above terms in the present invention according to specific situations.

Further, in the description of the present embodiment, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature therebetween. That is, in the description of the present embodiment, the first feature being "on", "above" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is higher in level than the second feature. A first feature "under," "beneath," or "beneath" a second feature may be directly under or obliquely under the first feature, or simply mean that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiments, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

FIG. 1 is a cycle diagram of a refrigeration system according to one embodiment of the present invention; FIG. 2 is a cycle diagram of a refrigeration system according to another embodiment of the present invention; fig. 3 is a cycle diagram of a refrigeration system according to yet another embodiment of the present invention.

In one aspect, a refrigeration system is provided. The refrigeration system is a vapor compression refrigeration cycle system, is used for outputting cold/heat so as to refrigerate/heat a specific space, and can be applied to refrigeration equipment such as an air conditioner, a refrigerator and the like.

As shown in fig. 1 to 3, a refrigeration system 10 according to an embodiment of the present invention includes a compressor 100, a condenser 200, a throttling device 400, and an evaporator 500, which are connected by pipes to form a circulation circuit in which a refrigerant circulates. The flow restriction device 400 may be a capillary tube. Of course, the refrigeration system 10 may further include other refrigeration components, such as filters, valves, and the like. The principles of vapor compression refrigeration cycles and the connections of the various components are well known to those skilled in the art and will not be described further herein.

In operation of the refrigeration system 10, the refrigerant pressure at the condenser 200 is higher and the refrigerant pressure at the evaporator 500 is lower. After the refrigeration system 10 is stopped, the high-pressure refrigerant at the condenser 200 flows to the evaporator 500 through the throttling device 400, so that the pressures of the condenser 200 and the evaporator 500 gradually tend to be balanced. The next time the refrigeration system is started, the compressor 100 is restarted, and the high pressure of the condenser 200 and the low pressure of the evaporator 500 need to be reestablished. Therefore, during the initial period of time when the compressor 100 is turned on, the refrigerant migrates from the evaporator 500 to the condenser 200 to establish a high-low pressure difference, and during this period of time the system has no refrigeration effect, so that the compressor 100 does no work.

To solve the above problem, the refrigeration system 10 of the embodiment of the present invention further includes a pressure adjustment device 300. The pressure regulating device 300 is connected to the circulation circuit of the refrigeration system 10 and is located between the condenser 200 and the throttling device 400. The pressure regulating device 300 is configured to: when the refrigeration system 10 is in operation, the pressure regulating device 300 is in a conduction state allowing the refrigerant to pass therethrough, and the refrigerant is normally circulated. After the refrigeration system 10 is stopped, the pressure adjustment device 300 is switched to the blocking state to block the flow of the high-pressure refrigerant on the condenser 200 side to the expansion device 400, to maintain the refrigerant on the condenser 200 in a relatively high-pressure state, and to maintain the low-pressure refrigerant on the evaporator 500 side in a relatively low-pressure state, so that a certain pressure difference is maintained between the two. Therefore, after the refrigeration system 10 is restarted, because the pressure difference exists in the system, the refrigeration system 10 can enter a refrigeration state quickly without reestablishing the pressure difference after being started, so that the waiting time is saved, and the power loss of the original waiting time is also saved.

In some embodiments, as shown in fig. 1, the pressure regulating device 300 includes a shut-off valve 310, the shut-off valve 310 being located between the condenser 200 and the throttling device 400 for opening or closing a passage therebetween. The refrigeration system 10 is configured to: when the power-on operation is performed, the cut-off valve 310 is in an open state; after the shutdown, the shutoff valve 310 is switched to the closed state to block the flow of the high-pressure refrigerant on the condenser 200 side to the expansion device 400, and the pressure difference is maintained. Of course, it will be appreciated that when the refrigeration system 10 is restarted, the shutoff valve 310 will need to be switched back to the open position.

In other embodiments, as shown in fig. 2, the pressure regulating device 300 includes a first valve 331 and a first refrigerant collecting tank 320. A first valve 331 is located between the condenser 200 and the throttling device 400 for opening or closing a passage therebetween. The first refrigerant collecting tank 320 has a second valve 332 for controlling the inflow/outflow of the refrigerant, and the second valve 332 is connected between the condenser 200 and the first valve 331. That is, the first refrigerant collecting tank 320 has only one nozzle for both liquid inlet and liquid outlet, and the second valve 332 is used for controlling the on/off of the nozzle.

The refrigeration system 10 is configured to: during the startup operation, the first valve 331 is opened, and the second valve 332 is closed, so that the high-pressure refrigerant flowing out of the condenser 200 normally flows to the throttling device 400 through the first valve 331 and does not enter the first refrigerant collecting tank 320; after the shutdown, the first valve 331 is closed and the second valve 332 is opened to introduce the refrigerant into the first refrigerant collection tank 320.

In the embodiment, the first refrigerant collecting tank 320 is used for accommodating a part of high-pressure refrigerant, so that the excessive high pressure and temperature of the condenser 200, which causes the excessive high discharge pressure and discharge temperature when the compressor 100 is turned on again, is avoided, the service life of the compressor 100 is prolonged, and the operating power of the compressor 100 is reduced. Of course, it can be understood that when the refrigeration system 10 is restarted, the first valve 331 needs to be opened again so as to discharge the stored refrigerant from the first refrigerant collecting tank 320, and after the discharge is completed, the second valve 332 is closed so as to restore the normal cycle of the refrigeration system.

Further, in this embodiment, the pressure regulating device 300 may further include a third valve 333, the third valve 333 being located between the condenser 200 and the second valve 332. The refrigeration system 10 is configured to: in the power-on operation, the first valve 331 and the third valve 333 are opened, and the second valve 332 is closed. After the shutdown, the first valve 331 is closed, and the second valve 332 and the third valve 333 are opened to allow the refrigerant to enter the first refrigerant collecting tank 320. After the refrigeration system 10 is restarted, the first valve 331 and the second valve 332 are opened again, the third valve 333 is closed to discharge the high-pressure refrigerant in the first refrigerant collection tank 320 toward the throttle device 400, and after the discharge is completed, the second valve 332 is closed again, and the third valve 333 is opened to return the refrigeration system to the normal circulation. Therefore, the refrigerant can be prevented from flowing backwards to impact the condenser, and the energy efficiency of the system is increased.

As shown in fig. 2, the first valve 331, the second valve 332, and the third valve 333 may be integrated into an integrated valve for uniform control.

In still other embodiments, as shown in fig. 3, the pressure regulating device 300 includes a stop valve 310 and a second refrigerant collecting tank 340. A shut-off valve 310 is located between the condenser 200 and the throttling device 400 for opening or closing the passage therebetween. The second refrigerant collecting tank 340 has an inlet end allowing the refrigerant to enter and an outlet end allowing the refrigerant to flow out. The inlet end of the second refrigerant collecting tank 340 is communicated with the condenser 200, and the outlet end is communicated with the stop valve 310.

The refrigeration system 10 is configured to: in the startup operation, the shutoff valve 310 is opened, and the high-pressure refrigerant flowing out of the condenser 200 flows to the expansion device 400 through the second refrigerant collecting tank 340 and the shutoff valve 310 in this order. After the shutdown, the shutoff valve 310 is switched to a closed state to promote the refrigerant to flow into the second refrigerant collecting tank 340. Of course, it will be appreciated that when the refrigeration system 10 is restarted, the shutoff valve 310 will need to be switched back to the open position.

Furthermore, a filter screen can be arranged in the second refrigerant collecting tank 340, and when the refrigeration system 10 operates normally, the second refrigerant collecting tank 340 can play a role of a filter, so that the filter does not need to be additionally arranged, and the system cost is saved.

In the above embodiment, the pressure regulating device 300 may be disposed adjacent to the condenser 200 so as to allow the high-pressure refrigerant to more rapidly enter the first refrigerant collecting tank 320 or the second refrigerant collecting tank 340 after the refrigeration system 10 is stopped.

As shown in fig. 4, another aspect of the present invention also provides a refrigerator. The refrigerator includes a refrigeration system 10 as described in any of the above embodiments.

The refrigerator further includes a controller 20, and the controller 20 is connected to the refrigeration system 10 for controlling the operation of the refrigeration system 10, including controlling the operation of the pressure regulating device 300.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. A refrigerating system comprises a compressor, a condenser, a throttling device and an evaporator, wherein the compressor, the condenser, the throttling device and the evaporator are connected through pipelines to form a circulating loop, and the refrigerating system is characterized by further comprising:

2. The refrigerant system as set forth in claim 1,

the pressure regulating device comprises a stop valve located between the condenser and the throttling device;

3. The refrigerant system as set forth in claim 1, wherein said pressure regulating device includes:

a first valve located between the condenser and the throttling device; and

4. The refrigerant system as set forth in claim 3, wherein said pressure regulating device further includes:

a third valve located between the condenser and the second valve.

5. The refrigerant system as set forth in claim 4,

the first valve, the second valve, and the third valve are integrated into an integrated valve.

6. The refrigerant system as set forth in claim 1, wherein said pressure regulating device includes:

7. The refrigerant system as set forth in claim 6,

and a filter screen is arranged in the second refrigerant collecting tank.

8. The refrigerant system as set forth in claim 1,

the pressure regulating device is disposed adjacent to the condenser.

9. The refrigerant system as set forth in claim 1,

the throttling device is a capillary tube.

10. A refrigerator characterized by comprising the refrigeration system as recited in any one of claims 1 to 9.