Refrigerating and defrosting system of retail cabinet and retail cabinet

Abstract

The utility model is suitable for the technical field of retail cabinets, and discloses a refrigeration and defrosting system of a retail cabinet and the retail cabinet, the refrigeration and defrosting system comprises a compressor, a condenser, an evaporator, a drying filter, a throttling element, an electric valve, a defrosting pipe and a temperature measuring device, and the compressor, the condenser, the drying filter, the throttling element and the evaporator are connected in sequence; in the flowing direction of fluid, the electric valve is arranged between the drying filter and the throttling element, one end of the defrosting pipe is connected to the electric valve, and the other end of the defrosting pipe is connected to the evaporator. The temperature measuring device is arranged on the evaporator to detect the real-time temperature of the evaporator, and the electric valve is used for enabling one of the throttling element and the defrosting pipe to be communicated with the drying filter under triggering of the temperature measuring device. According to the refrigerating and defrosting system of the retail cabinet, energy consumption can be reduced, energy is saved, and the service life of the compressor can be prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of retail cabinets, and in particular to a defrosting system of a retail cabinet and the retail cabinet. BACKGROUND

[0002] Some current retail cabinets are mainly used to refrigerate food stored in the retail cabinet or keep the food in the retail cabinet at room temperature. The retail cabinet is equipped with a refrigeration system, which includes a compressor, a condenser and an evaporator in fluid communication. However, the retail cabinet has the characteristic of being frequently opened, and when the door is opened, a large amount of hot and humid air enters the cabinet body, which easily causes frost to form on the evaporator, affecting the refrigeration effect. In some related technologies, a pipeline and a defrosting valve are arranged between the outlet of the compressor and the inlet of the evaporator. When defrosting, the high-temperature refrigerant from the compressor can be delivered to the evaporator through the defrosting valve.

[0003] However, the defrosting valve needs to be powered all the time when defrosting, which not only consumes a lot of electricity but also affects the service life of the defrosting valve. At the same time, when defrosting, the high-temperature refrigerant gas is sent into the evaporator, condensed into liquid in the evaporator, and then sucked back into the compressor, which affects the service life of the compressor. CONTENT OF THE INVENTION

[0004] In view of the above shortcomings of the prior art, the purpose of the present application is to provide a defrosting system of a retail cabinet and the retail cabinet, which can reduce energy consumption, save energy, and prolong the service life of the compressor.

[0005] To solve the above technical problems, the present application provides a defrosting system of a retail cabinet, which is arranged in the cabinet body of the retail cabinet. The defrosting system includes a compressor, a condenser, an evaporator, a drying filter, a throttling element, an electric valve, a defrosting pipe and a temperature measuring device. The compressor, the condenser, the drying filter, the throttling element and the evaporator are connected in sequence.

[0006] In the flow direction of the fluid, the electric valve is arranged between the drying filter and the throttling element. One end of the defrosting pipe is connected to the electric valve, and the other end of the defrosting pipe is connected to the evaporator.

[0007] The temperature measuring device is arranged in the evaporator to detect the real-time temperature of the evaporator.

[0008] The electric valve is used to communicate one of the throttling element and the defrosting pipe with the drying filter under the triggering of the temperature measuring device.

[0009] In some embodiments, the electric valve is provided with an inlet, a first outlet and a second outlet. Under the driving of the electric valve, the inlet is in communication with the first outlet or the second outlet.

[0010] The drying filter is connected to the inlet through a pipeline at one end away from the condenser; one end of the throttling element is connected to the first outlet, and the other end of the throttling element is connected to the evaporator; one end of the defrosting pipe is connected to the second outlet, and the other end of the defrosting pipe is connected to the evaporator.

[0011] In some embodiments, the electric valve is provided with a communication chamber, and the inlet is in communication with the first outlet or the second outlet through the communication chamber.

[0012] In some embodiments, the evaporator is provided with an evaporator input pipe, and along the flow direction of the fluid, one end of the throttling element is connected to the electric valve, the other end of the throttling element is connected to the evaporator input pipe, one end of the defrosting pipe is connected to the electric valve, and the other end of the defrosting pipe is connected to the evaporator input pipe.

[0013] In some embodiments, the compressor and the condenser are arranged at the bottom of the cabinet, and the evaporator is arranged at the top of the cabinet.

[0014] In some embodiments, the refrigeration defrosting system further comprises a water collecting tank, a drainage pipe and a water box, the water collecting tank is arranged in the cabinet and below the evaporator, one end of the drainage pipe is in communication with the water collecting tank, the other end of the drainage pipe is in communication with the water box, and the water box is arranged at the bottom of the cabinet.

[0015] In some embodiments, the condenser is provided with a condenser fan, the condenser fan blows air towards the compressor, the compressor and the condenser are respectively arranged on the two sides of the condenser fan, and the water box is arranged on the same side of the compressor.

[0016] In some embodiments, the refrigeration defrosting system further comprises a controller, the electric valve and the temperature measuring device are electrically connected to the controller; the temperature measuring device is configured to send a trigger signal to the controller according to the real-time temperature of the evaporator, and the controller is configured to drive the electric valve according to the trigger signal, so that one of the throttling element and the defrosting pipe is in communication with the drying filter.

[0017] In some embodiments, the temperature measuring device is a temperature sensor; and / or,

[0018] The defrosting pipe is a defrosting capillary pipe, and the throttling element is a capillary pipe.

[0019] The embodiments of the present application also provide a retail cabinet, which comprises a cabinet and a refrigeration defrosting system of the retail cabinet as described above, and the refrigeration defrosting system is arranged in the cabinet.

[0020] The refrigeration defrosting system of the retail cabinet provided in the embodiments of the present application has the following beneficial effects:

[0021] In the embodiments, when the temperature monitoring device monitors that the temperature of the evaporator is lower than the set temperature, frost is formed on the evaporator at this time. In this case, the electric valve controls the dry filter to communicate with the defrosting pipe. The refrigerant flowing out of the compressor flows through the condenser, the dry filter, the defrosting pipe and the evaporator in sequence, and then flows back to the compressor. In this process, the evaporator continues to refrigerate the cabinet body, and the temperature of the refrigerant flowing out of the dry filter is higher than the temperature of the refrigerant flowing out of the throttling element. The refrigerant flowing into the evaporator through the defrosting pipe can increase the temperature of the evaporator by a certain degree, so as to melt the frost on the evaporator, and realize simultaneous defrosting and refrigeration.

[0022] In the embodiments, the refrigeration defrosting system is provided with an electric valve on the pipeline between the dry filter and the throttling element. When the single refrigeration mode and the defrosting-while-refrigerating mode are switched to each other, only a short time of power-on is needed to conduct the dry filter and the defrosting pipe, and cut off the dry filter and the throttling element, or conduct the dry filter and the throttling element, and cut off the dry filter and the defrosting pipe. In this way, the energy consumption can be reduced, the energy can be saved, and the service life of the electric valve can be prolonged. Moreover, the refrigeration defrosting system operates in the defrosting-while-refrigerating mode, which can ensure the taste of the food in the retail cabinet to a certain extent compared with the mode of stopping refrigeration when defrosting. At the same time, when defrosting, the refrigerant flowing out of the defrosting pipe is evaporated into gas in the evaporator by absorbing heat, which can effectively avoid the phenomenon of liquid strike caused by the backflow of refrigerant liquid to the compressor compared with the defrosting mode using high-temperature refrigerant gas, reduces the influence on the compressor, and prolongs the service life of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the drawings shown.

[0024] Figure 1 is a circulation diagram of the refrigeration defrosting system of the retail cabinet provided in the embodiments of the present application;

[0025] Figure 2 is Figure 1 is a local enlarged view of a in

[0026] Figure 3 is a structural schematic view of the retail cabinet from one perspective provided in the embodiments of the present application;

[0027] Figure 4 is a structural schematic view of the retail cabinet from another perspective provided in the embodiments of the present application.

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 1, defrosting system; 2, retail cabinet; 10, compressor; 11, compressor exhaust pipe; 20, condenser; 21, condenser fan; 30, evaporator; 31, evaporator input pipe; 32, evaporator fan; 40, drying filter; 50, electric valve; 51, inlet; 52, first outlet; 53, second outlet; 54, communication chamber; 60, throttling element; 70, defrosting pipe; 80, water pan; 90, drainage pipe; 101, water box; 102, return air pipe; 201, cabinet body; 2011, refrigeration cavity; 2012, compressor compartment; 2013, cabinet main body; 2014, cabinet door; 2015, blocking part. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] It should be noted that all directional indications, such as up, down, left, right, front, back, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0032] It should also be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or can have a middle element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or can be indirectly connected to the other element through a middle element.

[0033] In addition, the description involving "first", "second", etc. in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0034] In some related technologies, a refrigeration system includes a compressor, a condenser and an evaporator in fluid communication, a defrosting pipeline provided with a defrosting valve is communicated with an exhaust pipeline of the compressor, and an end of the defrosting pipeline away from the exhaust pipeline is communicated with the evaporator, so that when defrosting, high-temperature refrigerant gas discharged by the compressor flows into the evaporator through the defrosting valve and the defrosting pipeline to melt the ice and frost on the evaporator.

[0035] However, the defrosting valve needs to be powered all the time during defrosting, which consumes electric energy, and the temperature of the coil in the defrosting valve is proportional to the defrosting time, which affects the service life of the defrosting valve; moreover, during defrosting, high-temperature refrigerant gas is sent into the evaporator, at this time, the fan of the evaporator is turned off and the refrigeration in the retail cabinet is stopped, which affects the taste of food in the retail cabinet; at the same time, during defrosting, high-temperature and high-pressure gaseous refrigerant discharged by the compressor is sent into the evaporator, and the evaporator is in a low-temperature state, so that the high-temperature and high-pressure gaseous refrigerant is condensed to form liquid refrigerant in the evaporator, and the liquid refrigerant is sucked back into the compressor, which may cause liquid hammer phenomenon, affecting the valve plate, piston and cylinder of the compressor and affecting the service life of the compressor.

[0036] As shown in Figure 1 and Figure 3 Therefore, the embodiment provides a refrigeration and defrosting system 1 of a retail cabinet, which is arranged in a cabinet body 201 of the retail cabinet 2 and includes a compressor 10, a condenser 20, an evaporator 30, a drying filter 40, an electric valve 50, a throttling element 60, a defrosting pipeline 70 and a temperature measuring device (not shown in the figure), the compressor 10, the condenser 20, the drying filter 40, the throttling element 60 and the evaporator 30 are sequentially connected; along the flow direction of the fluid, the electric valve 50 is arranged between the drying filter 40 and the throttling element 60, one end of the defrosting pipeline 70 is connected to the electric valve 50, and the other end of the defrosting pipeline 70 is connected to the evaporator 30; the temperature measuring device is arranged in the evaporator 30 to detect the real-time temperature of the evaporator 30; the electric valve 50 is used to make one of the throttling element 60 and the defrosting pipeline 70 communicate with the drying filter 40 under the triggering of the temperature measuring device.

[0037] In the embodiment, the compressor 10 of the refrigeration and defrosting system 1 preferably uses a middle back pressure compressor, and through refrigeration debugging in combination with the related technologies, the refrigeration temperature of the evaporator 30 can be controlled to be above 0℃, when the evaporator 30 normally works and is not frosted, the refrigeration and defrosting system 1 can realize single refrigeration mode operation, in this case, the electric valve 50 controls the drying filter 40 to communicate with the throttling element 60, and the refrigerant flowing out of the compressor 10 sequentially flows through the condenser 20, the drying filter 40, the throttling element 60 and the evaporator 30, and then flows back to the compressor 10, in this process, the evaporator 30 refrigerates in the cabinet body 201, and the temperature measuring device detects the temperature of the evaporator 30 in real time. The throttling element 60 is used to throttle and depressurize the refrigerant.

[0038] In this embodiment, the electric valve 50 is used to make one of the throttling element 60 and the defrosting pipe 70 communicate with the drying filter 40 under the triggering of the temperature measuring device. It can be understood that when the temperature measuring device senses that the real-time temperature of the evaporator 30 is lower than the set temperature, the electric valve 50 is triggered to make the defrosting pipe 70 communicate with the drying filter 40; when the temperature measuring device senses that the real-time temperature of the evaporator 30 is greater than or equal to the set temperature, the electric valve 50 is triggered to make the throttling element 60 communicate with the drying filter 40.

[0039] In this way, when the temperature measuring device detects that the real-time temperature of the evaporator 30 is lower than the set temperature (for example, 0℃), at this time, frost is formed on the evaporator 30, in this case, the electric valve 50 controls the drying filter 40 to communicate with the defrosting pipe 70 and cut off the drying filter 40 and the throttling element 60, the refrigerant flowing out of the compressor 10 flows through the condenser 20, the drying filter 40, the defrosting pipe 70 and the evaporator 30 in turn, and then returns to the compressor 10, in this process, the evaporator 30 continues to refrigerate the cabinet 201, and the temperature of the refrigerant flowing out of the drying filter 40 is higher than that of the refrigerant flowing out of the throttling element 60, but it will not be too high, the refrigerant flowing into the evaporator 30 through the defrosting pipe 70 can make the temperature of the evaporator 30 rise by a certain amplitude, for example, 3℃, so as to melt the frost on the evaporator 30, and realize defrosting and refrigeration at the same time. When the temperature measuring device detects that the real-time temperature of the evaporator 30 is not lower than the set temperature, the electric valve 50 is triggered to control the drying filter 40 to communicate with the throttling element 60 and cut off the drying filter 40 and the defrosting pipe 70, and the mode of defrosting and refrigerating at the same time is switched to the single refrigeration mode.

[0040] In this embodiment, the refrigeration and defrosting system 1 is provided with the electric valve 50 on the pipeline between the drying filter 40 and the throttling element 60, when the single refrigeration mode and the defrosting and refrigerating mode are switched to each other, only a short time of power-on is needed, for example, 1 second, which can conduct the drying filter 40 and the defrosting pipe 70 and cut off the drying filter 40 and the throttling element 60, or conduct the drying filter 40 and the throttling element 60 and cut off the drying filter 40 and the defrosting pipe 70, which can reduce energy consumption, save energy and improve the service life of the electric valve 50; in addition, the refrigeration and defrosting system 1 adopts the defrosting and refrigerating mode, which can ensure the taste of the food in the retail cabinet 2 to a certain extent compared with the mode of stopping refrigeration during defrosting; at the same time, during defrosting, the refrigerant flowing out of the defrosting pipe 70 is evaporated into gas in the evaporator 30 by absorbing heat, which can effectively avoid the phenomenon of liquid strike when the refrigerant liquid returns to the compressor 10, reduce the influence on the compressor 10 and prolong the service life of the compressor 10.

[0041] As Figure 1As shown in some embodiments, the compressor 10, the condenser 20, the drying filter 40 and the electric valve 50 are connected in sequence by pipelines, the drying filter 40 is connected to the throttling element 60 and the defrosting pipe 70 by the electric valve 50, one end of the throttling element 60 and one end of the defrosting pipe 70 are connected to the electric valve 50, the other end of the throttling element 60 and the other end of the defrosting pipe 70 are connected to the evaporator 30, and the evaporator 30 is further connected to the compressor 10 by a pipeline, so as to realize fluid intercommunication of the compressor 10, the condenser 20 and the evaporator 30.

[0042] As shown in some embodiments, Figure 1 and Figure 2 As shown in some embodiments, the electric valve 50 is provided with an inlet 51, a first outlet 52 and a second outlet 53, under the driving of the electric valve 50, the inlet 51 is in communication with the first outlet 52 or the second outlet 53; one end of the drying filter 40 away from the condenser 20 is connected to the inlet 51 by a pipeline; one end of the throttling element 60 is connected to the first outlet 52, and the other end of the throttling element 60 is connected to the evaporator 30; one end of the defrosting pipe 70 is connected to the second outlet 53, and the other end of the defrosting pipe is connected to the evaporator 30.

[0043] In the present embodiment, the electric valve 50 is provided with the inlet 51, the first outlet 52 and the second outlet 53, and the electric valve 50 can be triggered by the temperature measuring device to conduct one of the first outlet 52 and the second outlet 53 to the inlet 51, so that the refrigerant flowing out of the drying filter 40 can flow into the electric valve 50 from the inlet 51, and then flow out of the electric valve 50 from the first outlet 52 or the second outlet 53, and then flow into the evaporator 30 through the throttling element 60 or the defrosting pipe 70, and then the electric valve 50 is triggered to conduct the inlet 51 to the first outlet 52 or the inlet 51 to the second outlet 53, so as to realize switching of the refrigeration and defrosting system 1 between the single refrigeration mode and the defrosting and refrigeration mode.

[0044] As shown in some embodiments, Figure 1 and Figure 2 As shown in some embodiments, the electric valve 50 is provided with a communication chamber 54, the inlet 51 is in communication with the first outlet 52 or the second outlet 53 through the communication chamber 54, and the structure of the electric valve 50 can be simplified. For example, the electric valve 50 is an electric three-way valve. In some embodiments, the communication chamber 54 includes a first channel and a second channel, the first channel and the second channel are in communication, the first channel is in communication with the inlet 51 and the first outlet 52 respectively, and the second channel is in communication with the inlet 51 and the second outlet 53 respectively.

[0045] As shown in some embodiments, Figure 1 and Figure 3As shown, in some embodiments, the evaporator 30 is provided with an evaporator inlet pipe 31. Along the flow direction of the fluid, one end of the throttling element 60 is connected to the electric valve 50, and the other end of the throttling element 60 is connected to the evaporator inlet pipe 31. One end of the defrost pipe 70 is connected to the electric valve 50, and the other end of the defrost pipe 70 is connected to the evaporator inlet pipe 31. In this embodiment, the evaporator inlet pipe 31 is provided to facilitate the connection of the throttling element 60 and the defrost pipe 70. In some embodiments, the evaporator 30 has an evaporator fan 32 for blowing cool air to the items stored in the retail cabinet 2.

[0046] like Figure 1 、 Figure 3 and Figure 4 As shown, in some embodiments, the compressor 10 and condenser 20 are both disposed at the bottom of the cabinet 201, and the evaporator 30 is disposed at the top of the cabinet 201. In this embodiment, the compressor 10, condenser 20, and evaporator 30 are rationally disposed within the cabinet 201, with the evaporator 30 disposed at the top of the cabinet 201. This allows for cooling items stored within the cabinet 201 from top to bottom, thereby improving the cooling effect. It should be noted that the compressor 10, condenser 20, and evaporator 30 are all existing devices.

[0047] like Figure 1 、 Figure 3 and Figure 4 As shown, in some embodiments, the refrigeration and defrosting system 1 further includes a water receiving tank 80, a drainage pipe 90, and a water box 101. The water receiving tank 80 is disposed in the cabinet 201 and is located below the evaporator 30. One end of the drainage pipe 90 is connected to the water receiving tank 80, and the other end of the drainage pipe 90 is connected to the water box 101. The water box 101 is disposed at the bottom of the cabinet 201. In this embodiment, condensed water generated during operation of the evaporator 30 can flow into the water receiving tank 80 and then be drained to the water box 101 by the drainage pipe 90. This effectively prevents condensed water generated during operation of the evaporator 30 from dripping into the storage space in the cabinet 201 used for storing items. In some embodiments, the pipeline connecting the compressor 10 and the condenser 20 is partially contained within the water box 101, effectively utilizing the space within the water box 101. In some embodiments, the compressor 10 is provided with a compressor exhaust pipe 11, and the end of the compressor exhaust pipe 11 away from the compressor 10 is connected to the condenser 20. The high-temperature refrigerant discharged from the compressor 10 is discharged to the condenser 20 through the compressor exhaust pipe 11. During this process, the condensed water can cool the compressor exhaust pipe 11, so that the high-temperature refrigerant releases heat in the compressor exhaust pipe 11, and then the refrigerant entering the condenser 20 can continue to release heat in the condenser 20.

[0048] like Figure 3 and Figure 4As shown in the drawings, in some embodiments, the condenser 20 is provided with a condenser fan 21 blowing air towards the compressor 10, the compressor 10 and the condenser 20 are respectively located on two sides of the condenser fan 21, and the water box 101 is arranged on the same side of the compressor 10. In this embodiment, the compressor 10, the condenser 20 and the water box 101 are all accommodated in the bottom of the cabinet body 201, the space in the bottom of the cabinet body 201 is reasonably used, the compressor 10 and the condenser 20 are respectively located on two sides of the condenser fan 21, and the water box 101 is arranged on the same side of the compressor 10, so that the structural compactness of the compressor 10, the condenser 20 and the water box 101 can be improved.

[0049] As shown in the drawings, Figure 1 In some embodiments, the refrigeration defrosting system 1 further comprises a controller (not shown in the drawings), the electric valve 50 and the temperature measuring device are electrically connected with the controller, the temperature measuring device is used for sending a trigger signal to the controller according to the real-time temperature of the evaporator 30, and the controller is used for driving the electric valve 50 according to the trigger signal, so that one of the throttling element 60 and the defrosting pipe 70 is in communication with the dry filter 40.

[0050] In this embodiment, the controller is arranged to realize automatic control of the refrigeration defrosting system 1, the temperature measuring device detects the temperature of the evaporator 30 in real time and sends the real-time temperature of the evaporator 30 to the controller, so that when the temperature of the evaporator 30 is lower than the set temperature, the temperature measuring device sends a trigger signal to the controller, the controller controls the electric valve 50 to connect the dry filter 40 and the defrosting pipe 70, so that the refrigeration defrosting system 1 automatically runs in the mode of defrosting and refrigeration at the same time. For example, the controller is internally provided with an automatic control module, and the automatic control module can be designed in combination with related technologies.

[0051] In combination with Figure 1 In some embodiments, the temperature measuring device is a temperature sensor, which improves the temperature measurement accuracy.

[0052] As shown in the drawings, Figure 1 In some embodiments, the defrosting pipe 70 is a defrosting capillary tube, the capillary tube has high thermal conductivity and good corrosion resistance, can realize continuous and stable throttling effect, and can accurately control the evaporation temperature of the refrigerant, so that the temperature of the refrigerant from the defrosting capillary tube is higher than the temperature of the refrigerant from the throttling element 60. Moreover, the high-pressure liquid refrigerant from the condenser 20 is throttled and depressurized by the defrosting capillary tube, becomes gaseous refrigerant by absorbing heat in the evaporator 30, and is sucked into the compressor 10 without liquid hammer phenomenon.

[0053] In combination with Figure 1 In some embodiments, the throttling element 60 is a capillary tube, which realizes throttling and pressure reduction of the refrigerant.

[0054] In combination with Figure 1 and Figure 3In some embodiments, the throttling element 60 and the defrosting pipe 70 are arranged on the same side, which can improve the compactness of the refrigeration defrosting system 1, and the throttling element 60 and the defrosting pipe 70 can be reasonably arranged in the cabinet 201. In some embodiments, the refrigeration defrosting system 1 further comprises a return pipe 102, one end of the return pipe 102 is in communication with the evaporator 30, the other end of the return pipe 102 is in communication with the compressor 10, and the return pipe 102 is arranged adjacent to the throttling element 60. The return pipe 102 can transport the refrigerant from the evaporator 30 back to the compressor 10.

[0055] As shown in Figure 1 and Figure 3 , the present embodiment further provides a retail cabinet 2 comprising a cabinet 201 and the refrigeration defrosting system 1 described above, and the refrigeration defrosting system 1 is arranged in the cabinet 201.

[0056] It can be understood that the retail cabinet 2 of the present embodiment uses the refrigeration defrosting system 1 described above, and the temperature of the storage space in the cabinet 201 can be controlled to be above 0℃. When defrosting is needed, at this time, the temperature measuring device detects that the temperature of the evaporator 30 is lower than the set temperature (such as 0℃), and the temperature measuring device triggers the electric valve 50 to communicate the dry filter 40 and the defrosting pipe 70. In this case, the refrigerant flowing into the evaporator 30 can raise the temperature of the evaporator 30 by a certain amplitude, so as to melt the frost on the evaporator 30, and at the same time, the evaporator 30 can continue to refrigerate the cabinet 201, realizing simultaneous defrosting and refrigeration.

[0057] The retail cabinet 2 of the present embodiment uses the refrigeration defrosting system 1 described above, which can reduce energy consumption, save energy, and improve the service life of the electric valve 50. Moreover, the refrigeration defrosting system 1 operates in the mode of defrosting and refrigerating at the same time, which can ensure the taste of the food in the retail cabinet 2 to a certain extent compared with the mode of stopping refrigeration when defrosting. At the same time, when defrosting, the refrigerant from the defrosting pipe 70 absorbs heat in the evaporator 30 and evaporates into gas, which can effectively avoid the phenomenon of liquid strike of the refrigerant liquid flowing back to the compressor 10 compared with the defrosting mode using high-temperature refrigerant gas, reduces the influence on the compressor 10, and prolongs the service life of the compressor 10.

[0058] As shown in Figure 3 and Figure 4As shown, in some embodiments, the cabinet body 201 is provided with a refrigeration cavity 2011 and a compressor compartment 2012, the refrigeration cavity 2011 is located at the top of the compressor compartment 2012, the evaporator 30 is received at the top of the refrigeration cavity 2011, the compressor 10, the condenser 20, the drying filter 40 and the water box 101 are all received in the compressor compartment 2012, and the evaporator 30, the compressor 10, the condenser 20, the drying filter 40 and the water box 101 are reasonably received in the cabinet body 201. In some embodiments, the cabinet body 201 includes a cabinet main body 2013 and a cabinet door 2014, the cabinet door 2014 is rotatably installed on the cabinet main body 2013 to open or close the cabinet main body 2013, the cabinet main body 2013 is provided with the refrigeration cavity 2011 and the compressor compartment 2012, and the side of the cabinet main body 2013 opposite to the cabinet door 2014 is provided with a blocking part 2015, so that when the retail cabinet 2 is placed against a wall, the blocking part 2015 separates the vertical support surface such as the wall surface from the cabinet main body 2013, improves the air circulation between the retail cabinet 2 and the wall surface, and helps the retail cabinet 2 to dissipate heat to the outside when working. Exemplarily, the blocking part 2015 is a blocking block.

[0059] The above description is only preferred embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation made according to the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A refrigeration and defrosting system for a retail cabinet, provided in the cabinet body of the retail cabinet, characterized in that: The refrigeration and defrosting system includes a compressor, a condenser, an evaporator, a drying filter, a throttling element, an electric valve, a defrosting pipe and a temperature measuring device, wherein the compressor, the condenser, the drying filter, the throttling element and the evaporator are connected in sequence; Along the flow direction of the fluid, the electric valve is arranged between the drying filter and the throttling element, one end of the defrost pipe is connected to the electric valve, and the other end of the defrost pipe is connected to the evaporator; The temperature measuring device is provided on the evaporator to detect the real-time temperature of the evaporator; The electric valve is used to connect one of the throttling element and the defrost pipe with the drying filter when triggered by the temperature measuring device.

2. The refrigeration and defrosting system for a retail cabinet according to claim 1, characterized in that: The electric valve is provided with an inlet, a first outlet and a second outlet. When the electric valve is driven, the inlet is communicated with the first outlet or the second outlet. One end of the drying filter away from the condenser is connected to the inlet through a pipeline; one end of the throttling element is connected to the first outlet, and the other end of the throttling element is connected to the evaporator; one end of the defrost pipe is connected to the second outlet, and the other end of the defrost pipe is connected to the evaporator.

3. The refrigeration and defrosting system for a retail cabinet according to claim 2, characterized in that: A communication chamber is provided in the electric valve, and the inlet is communicated with the first outlet or the second outlet through the communication chamber.

4. The refrigeration and defrosting system for a retail cabinet according to any one of claims 1 to 3, characterized in that: The evaporator is provided with an evaporator inlet pipe. Along the flow direction of the fluid, one end of the throttling element is connected to the electric valve, and the other end of the throttling element is connected to the evaporator inlet pipe. One end of the defrost pipe is connected to the electric valve, and the other end of the defrost pipe is connected to the evaporator inlet pipe.

5. The refrigeration and defrosting system for a retail cabinet according to any one of claims 1 to 3, characterized in that: The compressor and the condenser are both arranged at the bottom of the cabinet, and the evaporator is arranged at the top of the cabinet.

6. The refrigeration and defrosting system for a retail cabinet according to any one of claims 1 to 3, characterized in that: The refrigeration and defrosting system also includes a water receiving trough, a drainage pipe and a water box. The water receiving trough is arranged in the cabinet and is located below the evaporator. One end of the drainage pipe is connected to the water receiving trough, and the other end of the drainage pipe is connected to the water box. The water box is arranged at the bottom of the cabinet.

7. The refrigeration and defrosting system for a retail cabinet according to claim 6, characterized in that: The condenser has a condensing fan, and the condensing fan blows air toward the compressor. The compressor and the condenser are respectively located on both sides of the condensing fan, and the water box is arranged on the same side as the compressor.

8. The refrigeration and defrosting system for a retail cabinet according to any one of claims 1 to 3, characterized in that: The refrigeration and defrosting system further includes a controller, and the electric valve and the temperature measuring device are both electrically connected to the controller; The temperature measuring device is used to send a trigger signal to the controller according to the real-time temperature of the evaporator, and the controller is used to drive the electric valve according to the trigger signal to connect the throttling element and one of the defrost pipe to the drying filter.

9. The refrigeration and defrosting system for a retail cabinet according to any one of claims 1 to 3, characterized in that: The temperature measuring device is a temperature sensor; and / or, The defrost tube is a defrost capillary tube, and the throttling element is a capillary tube.

10. A retail cabinet, characterized in that: The utility model comprises a cabinet body and a refrigeration and defrosting system for a retail cabinet according to any one of claims 1 to 9, wherein the refrigeration and defrosting system is arranged in the cabinet body.

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