Refrigerating system, kitchen air conditioner and refrigerating method

Abstract

The invention provides a refrigerating system, a kitchen air conditioner and a refrigerating method.The refrigerating system comprises a cold storage box, a refrigerating circulation pipeline, a cold dissipation circulation pipeline, a circulation pump and a second fan, the evaporation end of the refrigerating circulation pipeline is arranged in the cold storage box, and the condensation end of the refrigerating circulation pipeline is arranged outside the cold storage box; a compressor is arranged on the pipe section, flowing from the evaporation end to the condensation end, of the refrigerating medium, and cold energy is transmitted to the condensation end through the compressor; the cold absorption end of the cold dissipation circulation pipeline is arranged in the cold storage box, and the cold dissipation end of the cold dissipation circulation pipeline is connected with a second heat exchange device arranged outside the cold storage box. The circulating pump is arranged on the cold dissipation circulating pipeline, and the cold carrying medium in the cold dissipation circulating pipeline circularly flows through the circulating pump, so that the cooling capacity is transmitted to the cold dissipation end from the cold absorption end; the second fan is arranged at the second heat exchange device and used for accelerating cold dissipation of the second heat exchange device; the refrigerating system provided by the invention solves the problem of refrigerating work in kitchen and bath spaces in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration technology, and in particular to a refrigeration system, a kitchen air conditioner and a refrigeration method. Background Art

[0002] The air conditioning system is a commonly used household appliance. Air conditioners generally cover indoor living rooms and bedrooms. If the air conditioner is introduced into the kitchen, it is necessary to reserve holes on the wall of the kitchen for the refrigerant pipe of the air conditioner to pass through, and the corresponding indoor and outdoor units need to be adapted for installation and use respectively.

[0003] The cost of installing an outdoor unit in the existing air-conditioning system is relatively high, especially for areas such as the kitchen that are prone to generating a lot of heat. A larger power and higher performance compressor is required, which will increase the cost of air conditioning. In addition, in the kitchen area, the air conditioner is used for a relatively short time, and installing a high-power air conditioner will also result in a long period of idleness, resulting in a waste of resources. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the refrigeration problem in the kitchen and bathroom space in the prior art, thereby providing a refrigeration system, a kitchen air conditioner and a refrigeration method.

[0005] In order to solve the above technical problems, the present invention provides a refrigeration system, comprising:

[0006] A cold storage box having a cavity for accommodating a cold storage medium;

[0007] A refrigeration cycle pipeline, wherein the refrigeration cycle pipeline has a refrigeration medium, an evaporation end of the refrigeration cycle pipeline is arranged in the cold storage box, a condensation end of the refrigeration cycle pipeline is arranged outside the cold storage box, and a compressor is arranged on the pipe section where the refrigeration medium flows from the evaporation end to the condensation end;

[0008] A cooling circulation pipeline, wherein a cooling medium is contained in the cooling circulation pipeline, a cooling absorption end of the cooling circulation pipeline is arranged in the cold storage tank, and the cooling end of the cooling circulation pipeline is connected to a second heat exchange device arranged outside the cold storage tank;

[0009] A circulation pump is arranged on the cooling circulation pipeline, and is used to circulate the cooling medium in the cooling circulation pipeline;

[0010] The second fan is arranged at the second heat exchange device and is used to accelerate the cooling of the second heat exchange device.

[0011] Optionally, a pressure reducing device is provided on the pipe section where the refrigerant medium flows from the condensation end to the evaporation end.

[0012] Optionally, the condensing end of the refrigeration cycle pipeline is connected to a first heat exchange device, and a first fan is provided at the first heat exchange device.

[0013] Optionally, the refrigeration cycle pipeline and the cooling cycle pipeline are coiled in the cold storage box.

[0014] Optionally, the cooling circulation pipeline is in contact with the inner wall of the cold storage box.

[0015] Optionally, a heat insulation structure is provided on the outer wall of the cold storage box.

[0016] Optionally, an on-off valve is provided on the pipe section of the cooling circulation pipeline extending out of the cold storage tank, and a cooling medium storage tank is provided in the cooling circulation pipeline.

[0017] The present invention provides a kitchen air conditioner, comprising a refrigeration system as described in any one of the above solutions.

[0018] The present invention provides a refrigeration method, using the refrigeration system or kitchen air conditioner described in any one of the above solutions, comprising the following steps:

[0019] In the cold storage condition, when refrigeration is not needed, the compressor works, and the refrigerant in the refrigeration cycle pipe transfers the cold to the cold storage medium in the cold storage tank until the cold storage medium freezes;

[0020] In cooling operation, when cooling is needed, the circulating pump starts working, and the cooling medium in the cooling circulation pipeline transports the cold in the cold storage box to the second heat exchange device, and the cold air is transported toward the room through the second fan at the second heat exchange device.

[0021] Optionally, the time of the cold storage condition is greater than or equal to twice the time of the cooling condition.

[0022] The technical solution of the present invention has the following advantages:

[0023] 1. The refrigeration system provided by the present invention, when refrigeration is not needed, the refrigerant medium exchanges heat with the air through the condensing end of the refrigeration circulation pipeline, the refrigerant medium condenses and releases heat to generate cold, and the cold is sent to the cold storage box through the compressor, the refrigerant medium evaporates and absorbs heat at the evaporation end of the refrigeration circulation pipeline, and the refrigerant medium and the cold storage medium exchange heat through the refrigeration circulation pipeline in the cold storage box, and the cold is stored in the cold storage medium; when refrigeration is needed, the cold-carrying medium exchanges heat with the cold storage medium through the cold-dissipating circulation pipeline, and the cold-carrying medium circulates through the circulating pump to transport the cold to the second heat exchange device, the second heat exchange device exchanges heat with the indoor air to generate cold air, and the cold air is transported to the room through the second fan; by utilizing the very open use characteristics of the air conditioner in the kitchen and bathroom space, there is enough time for cold storage work, and a smaller power compressor can be used for cold storage work, which is lower in cost, and the accumulated cold can meet the general needs of users. The refrigeration system provided by the present invention solves the refrigeration work problem in the kitchen and bathroom space in the prior art.

[0024] 2. In the refrigeration system provided by the present invention, the refrigerant medium is in a high-pressure liquid state at the condensing end of the refrigeration cycle pipeline. It is throttled and reduced in pressure by a pressure reducing device, so that part of the liquid refrigerant medium is vaporized and absorbs the latent heat of vaporization. The temperature of the refrigerant medium is reduced accordingly, and it becomes low-temperature and low-pressure wet steam that enters the evaporation end of the refrigeration cycle pipeline, thereby improving the refrigeration efficiency.

[0025] 3. In the refrigeration system provided by the present invention, the condensing end of the refrigeration cycle pipeline exchanges heat with the air through the first heat exchange device, and the airflow generated by the first fan improves the heat exchange efficiency of the first heat exchange device, promotes the condensation and heat release of the refrigerant medium, and generates the required cooling capacity.

[0026] 4. In the refrigeration system provided by the present invention, the refrigeration circulation pipeline and the cooling circulation pipeline are coiled in the cold storage box, which increases the contact area between the refrigeration circulation pipeline and the cooling circulation pipeline and the cold storage medium and improves the heat exchange efficiency.

[0027] 5. The refrigeration system provided by the present invention utilizes the heat exchange characteristics of the inner wall of the cold storage box and the cold storage medium, and the cold storage circulation pipeline is fitted with the inner wall of the cold storage box, thereby increasing the heat exchange area between the cold storage circulation pipeline and the cold storage medium, thereby improving the heat exchange efficiency of the cold storage circulation pipeline.

[0028] 6. The refrigeration system provided by the present invention can reduce the loss of cold in the cold storage box and improve the utilization rate of cold energy through the heat insulation structure on the outer wall of the cold storage box.

[0029] 7. The refrigeration system provided by the present invention, when refrigeration is needed, opens the on-off valve to allow the coolant medium to transport the cold in the cool storage box to the second heat exchange device through the cooling circulation pipeline; when refrigeration is not needed, closes the on-off valve and shuts off the cooling circulation pipeline; the cooling medium storage tank arranged on the cooling circulation pipeline can prevent the circulating pump from sucking air.

[0030] 8. The kitchen air conditioner provided by the present invention has any of the above advantages because it adopts the above refrigeration system.

[0031] 9. The refrigeration method provided by the present invention is that when refrigeration is not needed, the refrigeration system enters the cold storage state, and the compressor works to make the refrigerant medium transport the cold energy to the cold storage medium in the cold storage box along the refrigeration circulation pipeline, and the cold energy is accumulated through the phase change of the cold storage medium from liquid to ice; when refrigeration is needed, the refrigeration system enters the cooling state, and the circulating pump works to make the cold-carrying medium transport the cold energy in the cold storage box to the second heat exchange device, the second heat exchange device exchanges heat with the indoor air to generate cold air, and the airflow generated by the second fan transports the cold air toward the indoor room; because the above-mentioned refrigeration system is adopted, any one of the above-mentioned advantages is possessed.

[0032] 10. In the refrigeration method provided by the present invention, the time of the cold storage condition is greater than or equal to twice the time of the cooling condition, so that the cold medium accumulated in the cold storage box can meet the cooling capacity required by the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of an implementation manner of a refrigeration system provided in an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1. Cold storage box; 2. Refrigeration circulation pipeline; 3. Compressor; 4. Cooling circulation pipeline; 5. Second heat exchange device; 6. Circulation pump; 7. Second fan; 8. Pressure reduction device; 9. First heat exchange device; 10. First fan; 11. On-off valve; 12. Cooling medium storage tank. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] This embodiment provides a refrigeration system capable of refrigerating a kitchen and bathroom space, so as to meet the refrigeration demand of a user for the kitchen and bathroom space.

[0042] like Figure 1 As shown, a specific implementation of a refrigeration system provided by the present embodiment includes: a cold storage box 1, a refrigeration circulation pipeline 2, a cooling circulation pipeline 4, a circulation pump 6 and a second fan 7; the cold storage box 1 has a cavity for accommodating a cooling medium; the cooling circulation pipeline 2 has a cooling medium therein, the evaporation end of the refrigeration circulation pipeline 2 is arranged in the cold storage box 1, the condensation end of the refrigeration circulation pipeline 2 is arranged outside the cold storage box 1, and a compressor 3 is arranged on the pipe section where the cooling medium flows from the evaporation end to the condensation end; the cooling circulation pipeline 4 has a cooling medium therein, the cooling absorption end of the cooling circulation pipeline 4 is arranged in the cold storage box 1, and the cooling end of the cooling circulation pipeline 4 is connected to a second heat exchange device 5 arranged outside the cold storage box 1; the circulation pump 6 is arranged on the cooling circulation pipeline 4, and is used to circulate the cooling medium in the cooling circulation pipeline 4 through the circulation pump 6; the second fan 7 is arranged at the second heat exchange device 5, and is used to accelerate the cooling of the second heat exchange device 5.

[0043] When in use, the refrigerant medium exchanges heat with the air through the condensing end of the refrigeration cycle pipeline 2, and the refrigerant medium condenses and releases heat to generate cold, which is sent to the cold storage box 1 through the compressor 3. The refrigerant medium evaporates and absorbs heat at the evaporation end of the refrigeration cycle pipeline 2, and the refrigerant medium and the cold storage medium exchange heat through the refrigeration cycle pipeline 2 in the cold storage box 1, and the cold is stored in the cold storage medium; when refrigeration is needed, the cold-carrying medium exchanges heat with the cold storage medium through the cold-dissipating cycle pipeline 4, and the cold-carrying medium circulates through the circulating pump 6 to transport the cold to the second heat exchange device 5, and the second heat exchange device 5 exchanges heat with the indoor air to generate cold air, which is transported to the room through the second fan 7; utilizing the very open use characteristics of the air conditioner in the kitchen and bathroom space, there is enough time for cold storage work, and a smaller power compressor 3 can be used for cold storage work, which is lower in cost, and the accumulated cold can meet the general needs of users. The refrigeration system provided in this embodiment solves the refrigeration work problem in the kitchen and bathroom space in the prior art.

[0044] It should be noted that the power of the compressor 3 is 20W-1000W. In order to reduce costs, the compressor 3 is preferably a fixed frequency type; the power of the circulating pump 6 is 0-80W, preferably a variable frequency type, which can be adjusted according to the cooling capacity required by the use environment, which can be more energy-efficient.

[0045] like Figure 1 As shown, in the refrigeration system provided in this embodiment, a pressure reducing device 8 is provided on the pipe section where the refrigerant medium flows from the condensation end to the evaporation end. When in use, the refrigerant medium is in a high-pressure liquid state at the condensation end of the refrigeration cycle pipeline 2, and is throttled and depressurized by the pressure reducing device 8, so that part of the liquid refrigerant medium is vaporized, and at the same time, the latent heat of vaporization is absorbed, and the temperature of the refrigerant medium is reduced accordingly, and becomes low-temperature and low-pressure wet steam to enter the evaporation end of the refrigeration cycle pipeline 2, thereby improving the refrigeration efficiency. Specifically, the pressure reducing device 8 can be an expansion valve or a throttling valve. In addition, as an alternative embodiment, the pressure reducing device 8 can also adopt a throttling element such as a capillary tube, a throttling short tube or an injection tube.

[0046] like Figure 1As shown, in the refrigeration system provided in this embodiment, the condensing end of the refrigeration cycle pipeline 2 is connected to a first heat exchange device 9, and a first fan 10 is provided at the first heat exchange device 9. When in use, the condensing end of the refrigeration cycle pipeline 2 exchanges heat with the air through the first heat exchange device 9, and the airflow generated by the first fan 10 improves the heat exchange efficiency of the first heat exchange device 9, promotes the condensation and heat release of the refrigerant medium, and generates the required cooling capacity. In addition, as an alternative embodiment, the first heat exchange device 9 and the first fan 10 can be omitted, and the refrigeration cycle pipeline 2 is connected to an external air conditioner to provide cooling capacity through the external air conditioner.

[0047] like Figure 1 As shown, in the refrigeration system provided in this embodiment, the refrigeration circulation pipeline 2 and the cooling circulation pipeline 4 are coiled in the cold storage tank 1. When in use, the refrigeration circulation pipeline 2 and the cooling circulation pipeline 4 are coiled in the cold storage tank 1, which increases the contact area between the refrigeration circulation pipeline 2 and the cooling circulation pipeline 4 and the cold storage medium, thereby improving the heat exchange efficiency.

[0048] like Figure 1 As shown, in the refrigeration system provided in this embodiment, the cooling circulation pipeline 4 is in contact with the inner wall of the cold storage box 1. When in use, by virtue of the heat exchange characteristics between the inner wall of the cold storage box 1 and the cold storage medium, the cold storage circulation pipeline is in contact with the inner wall of the cold storage box 1, and the heat exchange area between the cold storage circulation pipeline and the cold storage medium is increased, thereby improving the heat exchange efficiency of the cold storage circulation pipeline, and the length of the cooling circulation pipeline 4 can be appropriately reduced, thereby reducing the space occupied in the cold storage box 1. Specifically, the cooling circulation pipeline 4 is made of a material with good thermal conductivity, such as a metal material. In addition, as an alternative embodiment, the cooling circulation pipeline 4 may not be in contact with the inner wall of the cold storage box 1, and the refrigeration circulation pipeline 2 and the triangular circulation pipeline may be provided with corrugations, or fins extending radially outward.

[0049] like Figure 1 As shown, in the refrigeration system provided in this embodiment, a heat insulation structure is provided on the outer wall of the cold storage box 1. When in use, the heat insulation structure on the outer wall of the cold storage box 1 can reduce the loss of cold in the cold storage box 1 and improve the utilization rate of cold. Specifically, the outer sides of the refrigeration circulation pipeline 2 and the cooling circulation pipeline 4 outside the cold storage box 1 are both heat-insulated.

[0050] like Figure 1As shown, in the refrigeration system provided in this embodiment, an on-off valve 11 is provided on the pipe section of the cooling circulation pipeline 4 extending out of the cold storage tank 1, and a cooling medium storage tank 12 is provided in the cooling circulation pipeline 4. When refrigeration is required, the on-off valve 11 is opened to allow the cooling medium to transport the cold in the cold storage tank 1 to the second heat exchange device 5 through the cooling circulation pipeline 4. When refrigeration is not required, the on-off valve 11 is closed and the cooling circulation pipeline 4 is shut off; the cooling medium storage tank 12 provided on the cooling circulation pipeline 4 can prevent the circulation pump 6 from pumping air. Specifically, the cooling medium storage tank 12 can be provided outside the cold storage tank 1. In addition, as an alternative embodiment, the on-off valve 11 can be replaced by other valve components such as gate valves or butterfly valves for shutting off and opening the pipeline; the cooling medium storage tank 12 can also be provided inside the cold storage tank 1.

[0051] How to use

[0052] like Figure 1 As shown, the refrigeration system provided in this embodiment, when in use, close the shut-off valve, open the compressor 3, the refrigerant medium exchanges heat with the air through the first heat exchange device 9 at the condensing end of the refrigeration cycle pipeline 2, the first fan 10 blows toward the first heat exchange device 9 to improve the heat exchange efficiency, the refrigerant medium condenses and releases heat to generate cold, and the cold is sent to the cold storage box 1 through the compressor 3, the refrigerant medium evaporates and absorbs heat at the evaporation end of the refrigeration cycle pipeline 2, and the refrigerant medium and the cold storage medium exchange heat through the refrigeration cycle pipeline 2 in the cold storage box 1, and the cold is stored in the cold storage medium; when refrigeration is needed, close the compressor 3, open the on-off valve 11, the cold-carrying medium exchanges heat with the cold storage medium through the cooling cycle pipeline 4, circulates the cold-carrying medium through the circulating pump 6, and transports the cold to the second heat exchange device 5, the second heat exchange device 5 exchanges heat with the indoor air to generate cold air, and the cold air is transported to the room through the second fan 7.

[0053] In addition, this embodiment also provides a kitchen air conditioner, which adopts the refrigeration system described in the above embodiment to achieve refrigeration of the kitchen and bathroom space by using a low-power compressor 3.

[0054] In addition, this embodiment also provides a refrigeration method, which uses the refrigeration system described in the above embodiment, and includes the following steps:

[0055] In the cold storage working condition, when refrigeration is not needed, the compressor 3 works, and the refrigerant in the refrigeration cycle pipeline 2 transports the cold to the cold storage medium in the cold storage tank 1 until the cold storage medium freezes;

[0056] In the cooling condition, when cooling is needed, the circulating pump 6 works, and the cooling medium in the cooling circulation pipeline 4 transports the cold in the cold storage box 1 to the second heat exchange device 5, and the cold air is transported toward the room through the second fan 7 at the second heat exchange device 5.

[0057] When refrigeration is not needed, the refrigeration system enters the cold storage condition, and the compressor 3 works to make the refrigerant medium transport the cold energy to the cold storage medium in the cold storage box 1 along the refrigeration circulation pipeline 2, and the cold energy is accumulated through the phase change of the cold storage medium from liquid to ice; when refrigeration is needed, the refrigeration system enters the cooling condition, and the circulating pump 6 works to make the cold-carrying medium transport the cold energy in the cold storage box 1 to the second heat exchange device 5, and the second heat exchange device 5 exchanges heat with the indoor air to generate cold air, and the airflow generated by the second fan 7 transports the cold air toward the indoor room; due to the use of the above-mentioned refrigeration system, the use characteristics of the air conditioner in the kitchen and bathroom space are very open, and there is enough time to carry out the cold storage condition, and a smaller power compressor 3 can be used for cold storage work, and the accumulated cold energy can meet the general needs of users.

[0058] It should be noted that the cold storage medium is preferably water, because for the same volume of cold storage liquid, water can store more cold after freezing. When other cold storage liquids with faster freezing speeds are used, as the freezing speed increases, the cold storage liquid will eventually be completely frozen and the cold storage capacity that can be stored will gradually decrease. When refrigeration is needed, when the ice wrapped outside the cooling pipeline gradually melts during the above-mentioned heat exchange process and becomes liquid, there is still unmelted ice in the cold storage water tank, and the cold storage water tank is in an ice-water mixture state. At this time, the temperature of the cold storage liquid wrapped outside the cooling pipeline is maintained at a relatively constant state until the ice is completely melted.

[0059] In the refrigeration method provided in this embodiment, the time of the cold storage condition is greater than or equal to twice the time of the cooling condition. Specifically, under rated working conditions and constant air volume, the amount of cold stored in the cold storage condition for 2 hours can meet the needs of the cooling condition for 1 hour; in actual use, the kitchen and bathroom space uses idle time to store cold, and there is enough time to use a smaller power compressor 3 for long-term cold storage. According to the wind speed of the second fan 7 and the pumping volume of the circulating pump 6, the use time of the cooling condition varies, and the stored cold can meet the user's short-term cooling needs.

[0060] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present invention.

Claims

1. A refrigeration system, characterized in that: include: A cold storage box (1) having a cavity for accommodating a cold storage medium; A refrigeration cycle pipeline (2), wherein the refrigeration cycle pipeline (2) contains a refrigeration medium, the evaporation end of the refrigeration cycle pipeline (2) is arranged in the cold storage box (1), the condensation end of the refrigeration cycle pipeline (2) is arranged outside the cold storage box (1), and a compressor (3) is arranged on the pipe section where the refrigeration medium flows from the evaporation end to the condensation end; A cooling circulation pipeline (4), wherein the cooling circulation pipeline (4) contains a cooling medium, a cooling absorption end of the cooling circulation pipeline (4) is arranged in the cooling storage box (1), and the cooling end of the cooling circulation pipeline (4) is connected to a second heat exchange device (5) arranged outside the cooling storage box (1); A circulation pump (6) is arranged on the cooling circulation pipeline (4), and is used to circulate the cooling medium in the cooling circulation pipeline (4); The second fan (7) is arranged at the second heat exchange device (5) and is used to accelerate the cooling of the second heat exchange device (5).

2. The refrigeration system according to claim 1, characterized in that: A pressure reducing device (8) is provided on the pipe section where the refrigerant medium flows from the condensation end to the evaporation end.

3. The refrigeration system according to claim 1, characterized in that: The condensation end of the refrigeration cycle pipeline (2) is connected to a first heat exchange device (9), and a first fan (10) is provided at the first heat exchange device (9).

4. The refrigeration system according to claim 1, characterized in that: The refrigeration circulation pipeline (2) and the cooling circulation pipeline (4) are arranged in a coiled manner inside the cold storage box (1).

5. The refrigeration system according to claim 4, characterized in that: The cooling circulation pipeline (4) is in contact with the inner wall of the cold storage box (1).

6. The refrigeration system according to claim 5, characterized in that: The outer wall of the cold storage box (1) is provided with a heat insulation structure.

7. The refrigeration system according to any one of claims 1 to 6, characterized in that: An on-off valve (11) is provided on the pipe section of the cooling circulation pipeline (4) extending out of the cold storage tank (1), and a cooling medium storage tank (12) is provided in the cooling circulation pipeline (4).

8. A kitchen air conditioner, characterized in that: include: The refrigeration system according to any one of claims 1 to 7.

9. A refrigeration method, characterized in that: The refrigeration system according to any one of claims 1 to 7 or the kitchen air conditioner according to claim 8 comprises the following steps: In the cold storage working condition, when refrigeration is not needed, the compressor (3) works, and the refrigerant in the refrigeration cycle pipeline (2) transports cold to the cold storage medium in the cold storage box (1) until the cold storage medium freezes; In the cooling condition, when cooling is required, the circulating pump (6) works, and the cooling medium in the cooling circulation pipeline (4) transports the cold in the cold storage box (1) to the second heat exchange device (5), and the cold air is transported toward the room through the second fan (7) at the second heat exchange device (5).

10. The refrigeration method according to claim 9, characterized in that: The duration of the cold storage condition is greater than or equal to twice the duration of the cooling condition.

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