Refrigerating system
By introducing an exhaust defrosting pipe and a switching valve design into the refrigeration system, combined with a defrosting heater, the problems of uneven defrosting and high energy consumption of the evaporator were solved, achieving uniform defrosting of the refrigeration evaporator and reducing energy consumption.
Patent Information
- Application Number
- CN202423301064.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In existing refrigeration systems, the evaporator defrosts unevenly and the heater consumes a lot of energy.
The design employs an exhaust defrosting pipe and a switching valve, allowing high-temperature gaseous refrigerant to flow through the exhaust defrosting pipe into the refrigeration evaporator. Combined with the defrosting heater, the refrigeration evaporator is heated to achieve uniform defrosting. The flow of refrigerant to the refrigeration evaporator and the refrigeration evaporator is controlled by a throttle valve.
It achieves uniform defrosting of the refrigeration evaporator, reduces defrosting energy consumption, and improves refrigeration efficiency and defrosting effect.
Smart Images
Figure CN223580267U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of refrigeration, in particular to a refrigeration system. BACKGROUND
[0002] The refrigeration system cools by the refrigerant expanding and absorbing heat in the evaporator. In a long refrigeration process, frost will condense on the surface of the evaporator, and the evaporator needs to be defrosted. In the related art, the refrigeration system is provided with a defrosting heater to heat and defrost the evaporator, and the heating and defrosting is uneven. CONTENT OF THE UTILITY MODEL
[0003] Therefore, the embodiments of the present application aim to provide a refrigeration system to achieve uniform defrosting.
[0004] To achieve the above-mentioned purpose, the embodiments of the present application provide a refrigeration system, comprising: a compressor, a first switching valve, a refrigeration main flow path, a condenser, a second switching valve, a first refrigeration branch, a second refrigeration branch, a refrigeration evaporator, a freezing evaporator, a throttler and at least one exhaust defrosting pipe.
[0005] The first switching valve has a first inlet and at least two first outlets, and is used to make the at least two first outlets selectively communicate with the first inlet. The first inlet is connected with the output end of the compressor, and one end of the refrigeration main flow path is connected with one of the first outlets.
[0006] The second switching valve has a second inlet and at least two second outlets, and is used to make the at least two second outlets selectively communicate with the second inlet and to make the second inlet disconnected with the second outlets. The other end of the refrigeration main flow path is connected with the second inlet, the condenser is connected in series on the refrigeration main flow path, one end of the first refrigeration branch is connected with one of the second outlets, and one end of the second refrigeration branch is connected with the other second outlet.
[0007] The throttler is connected in series on the first refrigeration branch and the second refrigeration branch. The refrigerant of the first refrigeration branch flows back to the compressor through the refrigeration evaporator, and the refrigerant of the second refrigeration branch flows back to the compressor through the freezing evaporator.
[0008] Each exhaust defrosting pipe is connected with the corresponding first outlet, and the refrigerant of at least one exhaust defrosting pipe flows back to the compressor through the freezing evaporator.
[0009] In some embodiments, the refrigeration evaporator and the freezing evaporator are connected in series between the output end of the first refrigeration branch and the input end of the compressor, the second refrigeration branch is connected in series with the freezing evaporator, and the second refrigeration branch is connected in parallel with the refrigeration evaporator.
[0010] In some embodiments, one of the defrost exhaust pipes is a first defrost exhaust pipe, the first defrost exhaust pipe is connected in series between the first outlet and an input end of the freezing evaporator, and the other end of the second refrigeration branch is connected to the first defrost exhaust pipe.
[0011] In some embodiments, one of the defrost exhaust pipes is a second defrost exhaust pipe, the second defrost exhaust pipe is connected in series between the first outlet and an input end of the refrigerating evaporator.
[0012] In some embodiments, the refrigeration system further comprises a connecting pipe connected between the refrigerating evaporator and the freezing evaporator, and the other end of the second refrigeration branch is connected to the connecting pipe.
[0013] In some embodiments, one of the defrost exhaust pipes is a first defrost exhaust pipe, the first defrost exhaust pipe is connected in series between the first outlet and an input end of the freezing evaporator, and the other end of the second refrigeration branch is connected to the first defrost exhaust pipe, one of the defrost exhaust pipes is a second defrost exhaust pipe, and the second defrost exhaust pipe is connected in series between the first outlet and an input end of the refrigerating evaporator.
[0014] In some embodiments, the refrigeration system further comprises a connecting pipe connected between the refrigerating evaporator and the freezing evaporator, and the other end of the second refrigeration branch is connected to the connecting pipe.
[0015] In some embodiments, the refrigeration system further comprises a first backflow branch, a backflow main flow path, and a one-way valve, the first backflow branch and the backflow main flow path are connected in series between an output end of the freezing evaporator and an input end of the compressor, the first backflow branch is connected in parallel to the refrigerating evaporator, the backflow main flow path is connected in series between an output end of the refrigerating evaporator and an input end of the compressor, and the one-way valve is connected in series on the first backflow branch to limit the backflow of refrigerant to the freezing evaporator.
[0016] In some embodiments, one of the defrost exhaust pipes is a first defrost exhaust pipe, the first defrost exhaust pipe is connected in series between the first outlet and an input end of the freezing evaporator, and the other end of the second refrigeration branch is connected to the first defrost exhaust pipe.
[0017] In some embodiments, one of the defrost exhaust pipes is a second defrost exhaust pipe, the second defrost exhaust pipe is connected in series between the first outlet and an input end of the refrigerating evaporator.
[0018] In some embodiments, the refrigeration system includes a defrosting heater for heating the freeze evaporator.
[0019] The refrigeration system of the embodiments of the present application, when the refrigeration system performs refrigeration, the first switching valve is connected in communication with the first outlet corresponding to the first inlet and the refrigerant output by the compressor enters the refrigeration main flow path, the condenser is connected in series on the refrigeration main flow path, the refrigerant flows through the condenser, the condenser condenses the refrigerant into a liquid state, the liquid refrigerant flows into the first refrigeration branch or the second refrigeration branch through the second switching valve, the throttling device throttles and depressurizes the liquid refrigerant in the first refrigeration branch, the refrigerant in the first refrigeration branch flows through the refrigeration evaporator to perform refrigeration, and the refrigerant absorbs heat in the refrigeration evaporator and then flows back to the compressor; the throttling device throttles and depressurizes the liquid refrigerant in the second refrigeration branch, the refrigerant in the second refrigeration branch flows through the freeze evaporator to perform freeze refrigeration, and the refrigerant absorbs heat in the freeze evaporator and then flows back to the compressor. When the refrigeration system performs defrosting, the first switching valve is connected in communication with the first outlet corresponding to the first inlet and the exhaust defrosting pipe, the high-temperature gaseous refrigerant output by the compressor flows into the exhaust defrosting pipe from the first outlet, and the high-temperature gaseous refrigerant in at least one exhaust defrosting pipe flows through the freeze evaporator to defrost the freeze evaporator. The pipes of the freeze evaporator are covered with frost, and the higher-temperature refrigerant passing through the pipes of the freeze evaporator can fully absorb the heat of the refrigerant outside the pipes of the freeze evaporator, thereby achieving more uniform defrosting. The refrigerant in the exhaust defrosting pipe flows through the pipes of the freeze evaporator, and the frost around the pipes of the freeze evaporator can substantially absorb the heat emitted by the refrigerant, thereby reducing the dissipation of heat and reducing the energy consumption of the exhaust defrosting. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 The figure is a schematic diagram of the refrigeration system of the embodiments of the present application, and shows the refrigeration evaporator and the freeze evaporator in parallel, and shows the first exhaust defrosting pipe and the second exhaust defrosting pipe;
[0021] Figure 2 The figure is a schematic diagram of the refrigeration system of the embodiments of the present application, and shows the refrigeration evaporator and the freeze evaporator in parallel, and shows the first exhaust defrosting pipe and the second exhaust defrosting pipe;
[0022] Figure 3 The figure is a schematic diagram of the refrigeration system of the embodiments of the present application, and shows the refrigeration evaporator and the freeze evaporator in parallel, and shows the second exhaust defrosting pipe;
[0023] Figure 4 The figure is a schematic diagram of the refrigeration system of the embodiments of the present application, and shows the refrigeration evaporator and the freeze evaporator in parallel, and shows the first exhaust defrosting pipe.
[0024] REFERENCE SIGNS
[0025] 1 compressor; 2 refrigeration evaporator; 3 freezing evaporator; 4 defrosting heater; 51 first defrosting exhaust pipe; 52 second defrosting exhaust pipe; 6 first switching valve; 61 first inlet; 62 first outlet; 7 second switching valve; 71 second inlet; 72 second outlet; 8 refrigeration main flow path; 81 first refrigeration branch; 82 second refrigeration branch; 9 backflow main flow path; 91 first backflow branch; 10 condenser; 11 check valve; 12 throttle; 13 dry filter; 14 aluminum foil heating wire; 15 refrigeration temperature sensor; 16 freezing temperature sensor; 17 fan; 18 connecting pipe. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.
[0027] In the specific embodiments, various specific technical features described can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, various possible combinations of various specific technical features in the present application are not described again.
[0028] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that the objects have the same or relationship. It should be understood that the terms "upper", "lower", "outer", "inner" refer to the position of the normal use state, and the terms "left" and "right" refer to the left and right directions shown in the specific corresponding schematic diagram, which can be the left and right directions of the normal use state or not.
[0029] It should be noted that the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitation, the element defined by the sentence "including one" does not exclude the existence of other identical elements in the process, method, article or device including the element. "Multiple" means greater than or equal to two.
[0030] In the prior art, the defrosting heater is arranged outside the freezing evaporator to heat and defrost the freezing evaporator. The heat generated by the defrosting heater is concentrated on one side of the freezing evaporator. The defrosting speed of the side of the freezing evaporator close to the defrosting heater is relatively fast, and the side of the freezing evaporator away from the defrosting heater is not easy to absorb heat, resulting in uneven defrosting of the freezing evaporator. Moreover, the defrosting heater is arranged on one side of the freezing evaporator, and the heat generated by the defrosting heater cannot be completely absorbed by the frost on the freezing evaporator. The heat generated by the defrosting heater is dissipated to the surroundings, resulting in heat loss and large energy consumption of the defrosting heater.
[0031] In view of this, the embodiments of the present application provide a refrigeration system, please refer to Figures 1-4 The refrigeration system comprises a compressor 1, a first switching valve 6, a refrigeration main flow path 8, a condenser 10, a second switching valve 7, a first refrigeration branch 81, a second refrigeration branch 82, a refrigeration evaporator 2, a freezing evaporator 3, a throttling device 12 and at least one defrosting pipe. The first switching valve 6 has a first inlet 61 and at least two first outlets 62. The first switching valve 6 is used to make the at least two first outlets 62 selectively communicate with the first inlet 61. The first inlet 61 is connected with the output end of the compressor 1. One end of the refrigeration main flow path 8 is connected with one of the first outlets 62. The second switching valve 7 has a second inlet 71 and at least two second outlets 72. The second switching valve 7 is used to make the at least two second outlets 72 selectively communicate with the second inlet 71 and to disconnect the second inlet 71 from the second outlets 72. The other end of the refrigeration main flow path 8 is connected with the second inlet 71. The condenser 10 is connected in series on the refrigeration main flow path 8. One end of the first refrigeration branch 81 is connected with one of the second outlets 72. One end of the second refrigeration branch 82 is connected with the other second outlet 72. The throttling device 12 is connected in series on the first refrigeration branch 81 and the second refrigeration branch 82. The refrigerant of the first refrigeration branch 81 flows back to the compressor 1 through the refrigeration evaporator 2. The refrigerant of the second refrigeration branch 82 flows back to the compressor 1 through the freezing evaporator 3. Each defrosting pipe is connected with a corresponding first outlet 62. The refrigerant of at least one defrosting pipe flows back to the compressor 1 through the freezing evaporator 3.
[0032] Exemplarily, the number of the first outlets 62 is not limited, and the first outlets 62 can be two, three or four.
[0033] Exemplarily, the number of the second outlets 72 is not limited, and the second outlets 72 can be two, three or four.
[0034] It can be understood that the other end of the first refrigeration branch 81 is connected with the refrigeration evaporator 2.
[0035] Exemplarily, the temperature of the refrigeration evaporator 2 is relatively higher than that of the freezing evaporator 3. For example, the temperature of the refrigeration evaporator 2 is less than or equal to minus 10 degrees Celsius.
[0036] Exemplarily, the first switch valve 6 is an electric switch valve.
[0037] Exemplarily, the second switch valve 7 is an electric switch valve.
[0038] In the embodiment, when the refrigeration system performs refrigeration, the first switch valve 6 connects the first inlet 61 and the first outlet 62 corresponding to the refrigeration main flow path 8, the refrigerant output by the compressor 1 enters the refrigeration main flow path 8, the condenser 10 is connected in series on the refrigeration main flow path 8, the refrigerant flows through the condenser 10, the condenser 10 condenses the refrigerant into liquid state, the liquid refrigerant flows into the first refrigeration branch 81 or the second refrigeration branch 82 through the second switch valve 7, the throttling device 12 throttles and depressurizes the liquid refrigerant in the first refrigeration branch 81, the refrigerant in the first refrigeration branch 81 flows through the refrigeration evaporator 2 to perform refrigeration, and the refrigerant absorbs heat in the refrigeration evaporator 2 and then flows back to the compressor 1; the throttling device 12 throttles and depressurizes the liquid refrigerant in the second refrigeration branch 82, the refrigerant in the second refrigeration branch 82 flows through the freezing evaporator 3 to perform freezing, and the refrigerant absorbs heat in the freezing evaporator 3 and then flows back to the compressor 1. When the refrigeration system performs defrosting, the first switch valve 6 connects the first inlet 61 and the first outlet 62 corresponding to the exhaust defrosting pipe, the high-temperature gaseous refrigerant output by the compressor 1 flows into the exhaust defrosting pipe from the first outlet 62, the high-temperature gaseous refrigerant in at least one exhaust defrosting pipe flows through the freezing evaporator 3 to defrost the freezing evaporator 3, the pipe of the freezing evaporator 3 is covered by frost, and the higher-temperature refrigerant passing through the pipe of the freezing evaporator 3 can fully absorb the heat of the refrigerant, so that the frost is uniformly defrosted. The frost around the pipe of the freezing evaporator 3 can basically absorb the heat emitted by the refrigerant, reduce the heat dissipation, and reduce the energy consumption of the exhaust defrosting.
[0039] In some embodiments, referring to Figures 2-4 , the refrigeration evaporator 2 and the freezing evaporator 3 are connected in series between the output end of the first refrigeration branch 81 and the input end of the compressor 1, the second refrigeration branch 82 is connected in series with the freezing evaporator 3, and the second refrigeration branch 82 is connected in parallel with the refrigeration evaporator 2.
[0040] Exemplarily, the refrigerant absorbs less heat in the refrigeration evaporator 2, and the refrigerant absorbs more heat in the freezing evaporator 3.
[0041] In the embodiments of the present application, the second refrigeration branch 82 is connected in series with the freezing evaporator 3, the refrigerant in the second refrigeration branch 82 flows through the freezing evaporator 3 to perform freezing refrigeration, the second refrigeration branch 82 is connected in parallel with the refrigerating evaporator 2, and the refrigerant in the second refrigeration branch 82 does not flow through the refrigerating evaporator 2. The refrigerating evaporator 2 and the freezing evaporator 3 are connected in series between the output end of the first refrigeration branch 81 and the input end of the compressor 1. The refrigerant in the first refrigeration branch 81 flows through the refrigerating evaporator 2 to perform refrigeration refrigeration, and then flows through the freezing evaporator 3 to absorb heat in the freezing evaporator 3, and then flows back to the compressor 1. The refrigeration capacity of the refrigerant in the first refrigeration branch 81 is fully utilized to perform refrigeration on the freezing evaporator 3. The freezing refrigeration can be performed at the same time as the refrigeration refrigeration, which is beneficial to improve the refrigeration efficiency of the refrigeration system.
[0042] It can be understood that the refrigerating evaporator 2 and the freezing evaporator 3 are not limited to be connected in series. For example, the refrigerating evaporator 2 and the freezing evaporator 3 are connected in parallel.
[0043] In some embodiments, referring to Figure 2 and Figure 4 One of the defrosting discharge pipes is a first defrosting discharge pipe 51, the first defrosting discharge pipe 51 is connected in series between the first outlet 62 and the input end of the freezing evaporator 3, and the other end of the second refrigeration branch 82 is connected with the first defrosting discharge pipe 51.
[0044] It should be noted that the refrigeration system further comprises a connecting pipe 18 connected between the refrigerating evaporator 2 and the freezing evaporator 3, and one end of the first defrosting discharge pipe 51 is connected with the connecting pipe 18.
[0045] In the embodiments of the present application, the first defrosting discharge pipe 51 is connected in series between the first outlet 62 and the input end of the freezing evaporator 3, the high-temperature refrigerant output by the compressor 1 enters the first defrosting discharge pipe 51 from the first outlet 62, the refrigerant in the first defrosting discharge pipe 51 releases heat to defrost the freezing evaporator 3, and the higher-temperature refrigerant passes through the pipeline of the freezing evaporator 3, so that the heat of the refrigerant can be fully absorbed by the frost outside the pipeline of the freezing evaporator 3, thereby achieving more uniform defrosting and reducing heat dissipation.
[0046] In some embodiments, referring to Figure 2 and Figure 3 One of the defrosting discharge pipes is a second defrosting discharge pipe 52, and the second defrosting discharge pipe 52 is connected in series between the first outlet 62 and the input end of the refrigerating evaporator 2.
[0047] It should be noted that one end of the second defrosting discharge pipe 52 is connected with the first refrigeration branch 81, and the connection position of the second defrosting discharge pipe 52 with the first refrigeration branch 81 is located between the throttling device 12 on the first refrigeration branch 81 and the input end of the refrigerating evaporator 2.
[0048] In the embodiments of the present application, the second defrosting pipe 52 is connected in series between the first outlet 62 and the input end of the refrigeration evaporator 2. The high-temperature refrigerant output by the compressor 1 enters the second defrosting pipe 52 from the first outlet 62, and the refrigerant in the second defrosting pipe 52 releases heat to defrost the refrigeration evaporator 2. The refrigeration evaporator 2, the freezing evaporator 3 and the compressor 1 are connected in series. The refrigerant flowing out of the refrigeration evaporator 2 will pass through the freezing evaporator 3. The refrigeration evaporator 2 has a relatively high temperature, and the heat of the refrigerant flowing through the refrigeration evaporator 2 is not completely absorbed, but can also defrost the freezing evaporator 3. The heat of the refrigerant in the defrosting pipe is fully utilized to defrost the refrigeration evaporator 2 and the freezing evaporator 3, and the waste of refrigerant heat is reduced.
[0049] It can be understood that the refrigeration system can not be provided with the second defrosting pipe 52.
[0050] In some embodiments, referring to Figure 3 , the refrigeration system further comprises a connecting pipe 18 connected between the refrigeration evaporator 2 and the freezing evaporator 3, and the other end of the second refrigeration branch 82 is connected with the connecting pipe 18.
[0051] In the embodiments of the present application, the other end of the second refrigeration branch 82 is connected with the connecting pipe 18, so that the second refrigeration branch 82 is connected in series with the freezing evaporator 3, and the second refrigeration branch 82 is connected in parallel with the refrigeration evaporator 2. The refrigerant in the second defrosting pipe 52 flows through the refrigeration evaporator 2 and the freezing evaporator 3 in sequence, and the refrigerant in the second defrosting pipe 52 can also help to defrost the freezing evaporator 3. The first defrosting pipe 51 can be provided between the input end of the freezing evaporator 3 and the first outlet 62, or the first defrosting pipe 51 can not be provided. The first defrosting pipe 51 is relatively flexible.
[0052] It can be understood that the refrigeration system is not limited to be provided with the connecting pipe 18. For example, the refrigeration evaporator 2 and the freezing evaporator 3 are connected in parallel, the refrigeration system is not provided with the connecting pipe 18, and the other end of the second refrigeration branch 82 is connected with the defrosting pipe.
[0053] In some embodiments, referring to Figure 2 , one of the defrosting pipes is the first defrosting pipe 51, the first defrosting pipe 51 is connected in series between the first outlet 62 and the input end of the freezing evaporator 3, and the other end of the second refrigeration branch 82 is connected with the first defrosting pipe 51. One of the defrosting pipes is the second defrosting pipe 52, and the second defrosting pipe 52 is connected in series between the first outlet 62 and the input end of the refrigeration evaporator 2.
[0054] In the embodiments of the present application, the first defrosting exhaust pipe 51 is connected in series between the first outlet 62 and the input end of the freezing evaporator 3, the first defrosting exhaust pipe 51 defrosts the freezing evaporator 3, the second defrosting exhaust pipe 52 is connected in series between the first outlet 62 and the input end of the refrigerating evaporator 2, the second defrosting exhaust pipe 52 defrosts the refrigerating evaporator 2, and the refrigerant of the first defrosting exhaust pipe 51 and the second defrosting exhaust pipe 52 flows through the freezing evaporator 3 and returns to the compressor 1. By arranging the first defrosting exhaust pipe 51 and the second defrosting exhaust pipe 52, the refrigeration system can defrost the refrigerating evaporator and the freezing evaporator.
[0055] It can be understood that the other end of the second refrigeration branch 82 is not limited to being connected with the first defrosting exhaust pipe 51. For example, the other end of the second refrigeration branch 82 is connected with the connection pipe 18.
[0056] In some embodiments, referring to Figure 1 , the refrigerating evaporator 2 is connected in series between the first refrigeration branch 81 and the input end of the compressor 1, the freezing evaporator 3 is connected in series between the second refrigeration branch 82 and the input end of the compressor 1, and the refrigerating evaporator 2 and the freezing evaporator 3 are connected in parallel.
[0057] In the embodiments of the present application, the refrigerating evaporator 2 and the freezing evaporator 3 are connected in parallel, and the refrigerating evaporator 2 and the freezing evaporator 3 respectively perform defrosting, which is more flexible.
[0058] It can be understood that the refrigerating evaporator 2 and the freezing evaporator 3 are not limited to be connected in parallel. For example, the refrigerating evaporator 2 and the freezing evaporator 3 are connected in series.
[0059] In some embodiments, referring to Figure 1 , the refrigeration system further comprises a first backflow branch 91, a backflow main flow path 9, and a one-way valve 11, the first backflow branch 91 and the backflow main flow path 9 are connected in series between the output end of the freezing evaporator 3 and the input end of the compressor 1, the first backflow branch 91 is connected in parallel with the refrigerating evaporator 2, the backflow main flow path 9 is connected in series between the output end of the refrigerating evaporator 2 and the input end of the compressor 1, and the one-way valve 11 is connected on the first backflow branch 91 to limit the backflow of the refrigerant to the freezing evaporator 3.
[0060] It can be understood that the one-way valve 11 is connected to one side of the output end of the freezing evaporator 3.
[0061] In the embodiments of the present application, the return main flow path 9 is connected in series between the output end of the refrigeration evaporator 2 and the input end of the compressor 1, the refrigerant flowing out of the refrigeration evaporator 2 flows into the return main flow path 9 and then flows back to the compressor 1, the first return branch 91 and the return main flow path 9 are connected in series between the output end of the freezing evaporator 3 and the input end of the compressor 1, the refrigerant flowing out of the freezing evaporator 3 flows into the first return branch 91 and then flows into the return main flow path 9 and then flows back to the compressor 1, the one-way valve 11 is connected in series on the first return branch 91, so that the refrigerant can only flow from the first return branch 91 to the return main flow path 9, and the refrigerant cannot flow from the return main flow path 9 to the first return branch 91, the one-way valve 11 limits the refrigerant flowing out of the refrigeration evaporator 2 from flowing to the first return branch 91, thereby limiting the refrigerant flowing out of the refrigeration evaporator 2 from flowing back to the freezing evaporator 3.
[0062] It can be understood that the refrigeration system is not limited to the one-way valve 11. For example, the refrigeration system does not have the one-way valve 11, and the first return branch 91 is directly connected with the return main flow path 9.
[0063] In some embodiments, please refer to Figure 1 wherein one of the defrosting exhaust pipes is a first defrosting exhaust pipe 51, the first defrosting exhaust pipe 51 is connected in series between the corresponding first outlet 62 and the input end of the freezing evaporator 3, and the other end of the second refrigeration branch 82 is connected with the first defrosting exhaust pipe 51.
[0064] In the embodiments of the present application, the first defrosting exhaust pipe 51 is connected in series between the corresponding first outlet 62 and the input end of the freezing evaporator 3, the high-temperature refrigerant output by the compressor 1 flows into the first defrosting exhaust pipe 51 from the first outlet 62, and the high-temperature refrigerant in the first defrosting exhaust pipe 51 flows through the freezing evaporator 3 to perform freezing defrosting.
[0065] In some embodiments, please refer to Figure 1 wherein one of the defrosting exhaust pipes is a second defrosting exhaust pipe 52, and the second defrosting exhaust pipe 52 is connected in series between the corresponding first outlet 62 and the input end of the refrigeration evaporator 2.
[0066] In the embodiments of the present application, the second defrosting exhaust pipe 52 is connected in series between the corresponding first outlet 62 and the input end of the refrigeration evaporator 2, the high-temperature refrigerant output by the compressor 1 flows into the second defrosting exhaust pipe 52 from the first outlet 62, and the refrigerant in the second defrosting exhaust pipe 52 flows through the refrigeration evaporator 2 to perform refrigeration defrosting, the refrigerant flowing out of the refrigeration evaporator 2 flows back to the compressor 1, the refrigeration evaporator 2 is connected in parallel with the freezing evaporator 3, the refrigerant flowing out of the refrigeration evaporator 2 will not be heated by the defrosting heater 4, the temperature of the refrigeration evaporator 2 is relatively high, the higher-temperature refrigerant output by the compressor 1 will not be liquefied after flowing through the refrigeration evaporator 2, and the impact of the liquid refrigerant on the compressor 1 can be reduced without heating.
[0067] It can be understood that the refrigeration system can not be provided with the second defrosting exhaust pipe 52. Exemplarily, the refrigeration evaporator 2 and the freezing evaporator 3 are connected in parallel, the first defrosting exhaust pipe 51 is connected in series between the corresponding first outlet 62 and the input end of the freezing evaporator 3, the first switching valve 6 has two first outlets 62, one of which is connected with the first defrosting exhaust pipe 51, and the other of which is connected with one end of the refrigeration main flow path 8, the refrigerant in the first defrosting exhaust pipe 51 flows back to the compressor 1 through the freezing evaporator 3, and the refrigeration evaporator 2 is naturally defrosted.
[0068] In some embodiments, the refrigeration system comprises a defrosting heater 4, which is used for heating the freezing evaporator 3.
[0069] In the embodiments of the present application, the high-temperature gaseous refrigerant in the at least one defrosting exhaust pipe flows through the freezing evaporator 3 to defrost the freezing evaporator 3, and the defrosting heater 4 is used for heating the freezing evaporator 3 to increase the temperature of the freezing evaporator 3, which can not only accelerate the defrosting efficiency of the freezing evaporator 3, but also can reduce the temperature decrease of the refrigerant flowing through the freezing evaporator 3, reduce the refrigerant liquefaction, reduce the impact of the liquid refrigerant on the compressor 1, and thus reduce the possibility of damage of the compressor 1. The defrosting heater 4 assists the defrosting exhaust pipe in defrosting the freezing evaporator 3, and the defrosting heater 4 can be heated with a smaller power to reduce the heat dissipation of the defrosting heater 4 to the freezing compartment and reduce the energy consumption of the defrosting heater 4.
[0070] In some embodiments, the refrigeration system comprises a drying filter 13, which is connected in series on the refrigeration main flow path 8.
[0071] In some embodiments, the refrigeration system comprises an aluminum foil heating wire 14, which is used for heating the water pan of the refrigeration evaporator 2 to reduce the ice and frost accumulation in the water pan to block the drain.
[0072] In some embodiments, the refrigeration system comprises a refrigeration temperature sensor 15, which is used for measuring the temperature of the refrigeration evaporator 2.
[0073] In some embodiments, the refrigeration system comprises a freezing temperature sensor 16, which is used for measuring the temperature of the freezing evaporator 3.
[0074] In some embodiments, the refrigeration system comprises a fan 17, which is respectively arranged at the refrigeration evaporator 2 and the freezing evaporator 3.
[0075] In some embodiments, the refrigeration system is used for a refrigerator.
[0076] In the description of this application, the terms "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this application, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine different embodiments or examples described in this application, as well as features of different embodiments or examples.
[0077] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.
Claims
1. A refrigeration system characterized by, The refrigeration system comprises a compressor, a first switch valve, a refrigeration main flow path, a condenser, a second switch valve, a first refrigeration branch, a second refrigeration branch, a refrigeration evaporator, a freezing evaporator, a throttler and at least one defrosting pipe. The first switch valve has a first inlet and at least two first outlets, and is used to make the at least two first outlets communicate with the first inlet alternatively, the first inlet is connected with the output end of the compressor, and one end of the refrigeration main flow path is connected with one of the first outlets. The second switch valve has a second inlet and at least two second outlets, and is used to make the at least two second outlets communicate with the second inlet alternatively and to disconnect the second inlet from the second outlets, the other end of the refrigeration main flow path is connected with the second inlet, the condenser is connected in series on the refrigeration main flow path, one end of the first refrigeration branch is connected with one of the second outlets, and one end of the second refrigeration branch is connected with the other second outlet. The throttler is connected in series on the first refrigeration branch and the second refrigeration branch, the refrigerant of the first refrigeration branch flows back to the compressor through the refrigeration evaporator, and the refrigerant of the second refrigeration branch flows back to the compressor through the freezing evaporator. Each defrosting pipe is connected with a corresponding first outlet, and the refrigerant of at least one defrosting pipe flows back to the compressor through the freezing evaporator.
2. The refrigeration system of claim 1, wherein, The refrigeration evaporator and the freezing evaporator are connected in series between the output end of the first refrigeration branch and the input end of the compressor, the second refrigeration branch is connected in series with the freezing evaporator, and the second refrigeration branch is connected in parallel with the refrigeration evaporator.
3. The refrigeration system of claim 2, wherein, One of the defrosting pipes is a first defrosting pipe, the first defrosting pipe is connected in series between a corresponding first outlet and the input end of the freezing evaporator, and the other end of the second refrigeration branch is connected with the first defrosting pipe; and / or, one of the defrosting pipes is a second defrosting pipe, the second defrosting pipe is connected in series between a corresponding first outlet and the input end of the refrigeration evaporator.
4. The refrigeration system of claim 3, wherein, The refrigeration system further comprises a connecting pipe connected between the refrigeration evaporator and the freezing evaporator, and the other end of the second refrigeration branch is connected with the connecting pipe.
5. The refrigeration system of claim 2 wherein, One of the defrosting pipes is a first defrosting pipe, the first defrosting pipe is connected in series between a corresponding first outlet and the input end of the freezing evaporator, and the other end of the second refrigeration branch is connected with the first defrosting pipe, one of the defrosting pipes is a second defrosting pipe, and the second defrosting pipe is connected in series between a corresponding first outlet and the input end of the refrigeration evaporator.
6. The refrigeration system of claim 1, wherein, The refrigeration evaporator is connected in series between the first refrigeration branch and the input end of the compressor, the freezing evaporator is connected in series between the second refrigeration branch and the input end of the compressor, and the refrigeration evaporator is connected in parallel with the freezing evaporator.
7. The refrigeration system of claim 6, wherein, The refrigeration system further comprises a first reflux branch, a reflux main flow path and a one-way valve, the first reflux branch and the reflux main flow path are connected in series between the output end of the freezing evaporator and the input end of the compressor, the first reflux branch is connected in parallel with the refrigeration evaporator, the reflux main flow path is connected in series between the output end of the refrigeration evaporator and the input end of the compressor, and the one-way valve is connected in series on the first reflux branch to limit the refrigerant reflux to the freezing evaporator.
8. The refrigeration system of claim 6, wherein, One of the defrosting exhaust pipes is a first defrosting exhaust pipe, the first defrosting exhaust pipe is connected in series between the first outlet and the input end of the freezing evaporator, and the other end of the second refrigeration branch is connected with the first defrosting exhaust pipe.
9. The refrigeration system of claim 8, wherein, One of the defrosting exhaust pipes is a second defrosting exhaust pipe, the second defrosting exhaust pipe is connected in series between the first outlet and the input end of the refrigeration evaporator.
10. The refrigeration system of any of claims 1-9, wherein, The refrigeration system comprises a defrosting heater for heating the freezing evaporator.