Indoor heat exchanger for refrigeration house, refrigeration house indoor unit, refrigeration house air conditioner and refrigeration house system

Abstract

The utility model provides an indoor heat exchanger for a refrigeration house, a refrigeration house indoor unit, a refrigeration house air conditioner and a refrigeration house system.The indoor heat exchanger for the refrigeration house comprises a plurality of fins and a heat exchange pipe assembly, the distance between every two adjacent fins is smaller than or equal to 2 mm, and the heat exchange pipe assembly comprises a plurality of sets of flow dividing pipes, input pipes and output pipes; the multiple groups of shunting pipes are distributed in the length direction of the fins, the shunting pipes are in a winding shape and penetrate through the fins, the input pipe is provided with a first input port and a plurality of shunting output ports, one shunting output port is in butt joint with second input ports of one group of shunting pipes, and the output pipe is provided with a first output port and a plurality of shunting input ports; and one shunting input port is in butt joint with the second output port of one group of shunting pipes. The refrigeration house indoor unit comprises the indoor heat exchanger for the refrigeration house, the refrigeration house air conditioner is provided with the refrigeration house indoor unit, the refrigeration house system is provided with the refrigeration house air conditioner, and the indoor heat exchanger for the refrigeration house has the advantages of being small in size, low in production cost and capable of shortening defrosting time and improving the utilization rate of a storehouse.

Description

Technical Field

[0001] The utility model relates to the technical field of cold storage, and specifically, to an indoor heat exchanger for cold storage, a cold storage internal machine provided with the indoor heat exchanger for cold storage, a cold storage air conditioner provided with the cold storage internal machine, and a cold storage system provided with the cold storage air conditioner. Background Art

[0002] Cold storage systems are mainly used to store items with specific temperature and humidity requirements. Compared with traditional refrigerators, cold storage systems have greater cooling capacity and storage space, and are widely used in food, chemical, medical, scientific experiments and other fields. There are two main types of existing cold storage systems:

[0003] The first one is to lay out radiator pipes in the warehouse to cool the warehouse through heat exchange between the radiator pipes and the air in the warehouse; however, this type of cold storage system has the disadvantage that when defrosting the radiator pipes, the refrigeration system of the cold storage system needs to stop running to wait for the frost on the radiator pipes to melt naturally, so the defrosting time is long and the defrosting efficiency is low.

[0004] The second method is to install a cold storage machine in the warehouse, such as Figure 1 As shown, the cold storage internal machine 9 includes a chassis 91, a heat exchanger, a fan module 92 and a heating module. The chassis 91 is provided with an air outlet, the heat exchanger is arranged in the chassis 91, and the fan module 92 is installed on the air outlet. The fan module 92 is used to blow air into the warehouse to blow the cold air formed by the heat exchange of the heat exchanger into the warehouse. The heating module is arranged on the heat exchanger. When the heat exchanger needs to be defrosted, the cold storage system is controlled to suspend refrigeration and turn on the heating module to melt the frost blocks in the heat exchanger. This type of cold storage system can solve the shortcomings of the first type of cold storage system mentioned above; however, the shortcomings of this cold storage system are: since the cold storage internal machine 9 is a single-cooling refrigeration device and defrosts under the action of the heating module, there are problems such as long defrosting time and large fluctuations in the cold storage temperature. In order to reduce the number of defrosting times, the spacing between the fins is designed to be more than 4 mm, which makes the volume of the heat exchanger larger, and then makes the volume of the cold storage internal machine larger, occupying the warehouse space, reducing the utilization rate of the warehouse space. Summary of the invention

[0005] In order to solve the above problems, the first object of the utility model is to provide an indoor heat exchanger for cold storage which has a small size, low production cost, can shorten the defrosting time and can improve the utilization rate of the warehouse.

[0006] The second object of the utility model is to provide a cold storage indoor unit equipped with the above-mentioned cold storage indoor heat exchanger.

[0007] The third object of the utility model is to provide a cold storage air conditioner equipped with the cold storage internal unit.

[0008] The fourth object of the utility model is to provide a cold storage system equipped with the above-mentioned cold storage air conditioner.

[0009] In order to achieve the first purpose of the utility model, the utility model provides an indoor heat exchanger for a cold storage, including a plurality of fins, which are distributed along the thickness direction of the fins, wherein the spacing between two adjacent fins is less than or equal to 2 mm; the indoor heat exchanger for the cold storage also includes a heat exchange tube assembly, the heat exchange tube assembly includes a plurality of group manifolds, an input tube and an output tube, the plurality of group manifolds are distributed along the length direction of the fins, the manifolds are winding and pass through the fins, the input tube has a first input port and a plurality of manifold output ports, the plurality of manifold output ports correspond one-to-one to the plurality of group manifolds, and one manifold output port is connected to the second input port of a corresponding group of manifolds, the output tube has a first output port and a plurality of manifold input ports, the plurality of manifold input ports correspond one-to-one to the plurality of group manifolds, and one manifold input port is connected to the second output port of a corresponding group of manifolds.

[0010] It can be seen from the above that, through the design of the spacing between the fins, the volume of the indoor heat exchanger for the cold storage can be reduced by more than half compared with the volume of the indoor heat exchanger for the conventional cold storage while achieving the same required heat exchange area, thereby making the volume of the cold storage indoor unit equipped with the indoor heat exchanger for the cold storage smaller, so as to improve the utilization rate of the warehouse equipped with the cold storage indoor unit; and, the indoor heat exchanger for the cold storage can be suitable for cold storage air conditioners with cooling mode and heating mode, so as to realize thermal fluorine defrosting in conjunction with the spacing design of the fins, so as to greatly reduce the defrosting time and reduce the fluctuation of the ambient temperature in the warehouse; furthermore, through the design of the heat exchange tube assembly, the uniformity of the refrigerant heat exchange can be improved, thereby making the evaporation temperature of the indoor heat exchanger for the cold storage more uniform.

[0011] A further solution is that the heat exchange tube assembly also includes an electronic pressure regulating valve and a capillary tube; the input tube includes a first input section, a second input section, a mainstream section and multiple diversion sections, the first end of the first input section is a first input port, the second end of the first input section is connected to the inlet of the electronic pressure regulating valve, the first end of the second input section is connected to the outlet of the electronic pressure regulating valve, the second end of the second input section is connected to the mainstream section, the first end of the diversion section is connected to the mainstream section, the second end of the diversion section is a diversion output port, the first end of the capillary tube is connected to the first input section, and the second end of the capillary tube is connected to the second input section.

[0012] As can be seen from the above, this design enables the indoor heat exchanger for cold storage to cooperate with refrigerants, compressors, etc. to achieve low-temperature and ultra-low-temperature refrigeration, thereby improving the refrigeration range and refrigeration capacity of the indoor heat exchanger for cold storage.

[0013] A further solution is that the fins are made of copper, aluminum or stainless steel; the shunt pipe is made of copper, aluminum or stainless steel; the input pipe is made of copper, aluminum or stainless steel; and the output pipe is made of copper, aluminum or stainless steel.

[0014] It can be seen from the above that this design can ensure the heat exchange effect of the indoor heat exchanger for the cold storage.

[0015] In order to achieve the second purpose of the utility model, the utility model provides a cold storage indoor unit, including a first chassis, a mesh cover and a fan module, the first chassis having a first air outlet and a first return air outlet, the mesh cover is installed at the first air outlet and covers the first air outlet, the fan module is arranged in the first chassis, the fan module is located between the first air outlet and the first return air outlet, and the fan module supplies air to the first air outlet, wherein the cold storage indoor unit also includes the above-mentioned indoor heat exchanger for cold storage, the indoor heat exchanger for cold storage is arranged in the first chassis, and the indoor heat exchanger for cold storage is located between the first return air outlet and the fan module.

[0016] As can be seen from the above, the cold storage indoor unit is equipped with the above-mentioned indoor heat exchanger for cold storage, so that its volume is smaller and the utilization rate of the warehouse is improved; at the same time, the cold storage indoor unit can be suitable for cold storage air conditioners with cooling mode and heating mode, so as to realize thermal fluorine defrosting in conjunction with the fin spacing design, and can greatly reduce the defrosting time to reduce the ambient temperature fluctuation in the warehouse during defrosting; in addition, the cold storage indoor unit can also ensure the uniformity of refrigerant heat exchange, thereby improving the refrigeration effect of the cold storage indoor unit.

[0017] A further solution is that the fan module includes a bracket, a drive motor and fan blades, the bracket is installed in the first chassis, the drive motor is installed on the bracket, and the fan blades are installed on the drive shaft of the drive motor.

[0018] It can be seen from the above that the structural design of the fan module makes it more convenient to repair the machine in the cold storage, and can reduce the production cost and maintenance cost of the machine in the cold storage; in addition, it is also beneficial to reduce the weight of the machine in the cold storage, reduce the vibration generated when the machine in the cold storage is working, and reduce the noise generated when the machine in the cold storage is working.

[0019] A preferred solution is that the bracket has a clamping portion, which is located between the main body of the bracket and the indoor heat exchanger for the cold storage, and the clamping portion has a connecting piece, a first spring piece and a second spring piece, the connecting piece is connected between the first spring piece and the second spring piece, the first spring piece and the second spring piece are distributed along the axial direction of the first air outlet, and a clamping position is formed between the connecting piece, the first spring piece and the second spring piece, and the indoor heat exchanger for the cold storage is clamped in the clamping position.

[0020] As can be seen from the above, the design of the clip-on part allows the bracket to be connected with the indoor heat exchanger for the cold storage in the first chassis through the clip-on part after being installed in the first chassis, so as to further improve the stability and fixation of the bracket after installation, and also ensure the stability and firmness of the installation of the indoor heat exchanger for the cold storage.

[0021] Another preferred solution is that the mesh cover is made of polyethylene, polypropylene, polytetrafluoroethylene, polyamide or polyetheretherketone; the fan blades are made of polyethylene, polypropylene, polytetrafluoroethylene, polyamide or polyetheretherketone.

[0022] As can be seen from the above, through the material design of the mesh cover and the fan blades, the mesh cover and the fan blades have the advantages of light weight and low temperature resistance, which is more conducive to reducing the weight of the machine in the cold storage and is conducive to ensuring the service life of the mesh cover and the fan blades.

[0023] A further solution is that the number of first air outlets is between 1 and 8; the number of mesh covers is between 1 and 8, and one mesh cover is installed at one first air outlet; the number of fan modules is between 1 and 8, and one fan module is arranged to match one first air outlet.

[0024] As can be seen from the above, the above design allows the cold storage internal machine to be set to different matching specifications, so that the cold storage internal machine can be suitable for warehouses of different sizes, and can ensure that while meeting the refrigeration needs in the warehouse, the warehouse space occupied by the cold storage internal machine can be better reduced.

[0025] In order to achieve the third purpose of the utility model, the utility model provides a cold storage air conditioner, including a cold storage outdoor unit, the cold storage outdoor unit includes a second chassis, an outdoor heat exchanger, a compressor, an expansion valve, a four-way valve and an outdoor fan, the second chassis has a second air outlet and a second return air outlet, the outdoor heat exchanger is arranged in the chassis and is located between the second air outlet and the second return air outlet, the compressor, the expansion valve and the four-way valve are all arranged in the second chassis, the air outlet of the compressor is connected to the input port of the four-way valve, the air return port of the compressor is connected to the output port of the four-way valve, and the outdoor heat exchanger is connected to the outdoor heat exchanger. The first connector of the heat exchanger is connected to the first interface of the expansion valve, the second connector of the outdoor heat exchanger is connected to the first transfer port of the four-way valve, the outdoor fan is arranged in the second chassis and is located between the outdoor heat exchanger and the second air outlet, wherein the cold storage air conditioner also includes the above-mentioned cold storage indoor unit, the first input port is connected to the second interface of the expansion valve, and the first output port is connected to the second transfer port of the four-way valve; when the air outlet is connected to the first transfer port, the return air port is connected to the second transfer port; when the air outlet is connected to the second transfer port, the return air port is connected to the first transfer port.

[0026] It can be seen from the above that the cold storage air conditioner can better improve the utilization rate of the warehouse by setting the above-mentioned cold storage internal unit. At the same time, the cold storage air conditioner can also have a cooling mode and a heating mode to improve the practicality of the cold storage air conditioner; at the same time, in conjunction with the fin spacing design, thermal fluorine defrosting can be achieved, and the defrosting time can be greatly reduced, thereby reducing the ambient temperature fluctuation in the warehouse during defrosting, and the refrigeration effect of the cold storage internal unit can also be improved.

[0027] In order to achieve the fourth purpose of the utility model, the utility model provides a cold storage system, including a storehouse, which also includes the above-mentioned cold storage air conditioner, the cold storage internal unit is arranged in the storehouse, and the cold storage external unit is arranged outside the storehouse.

[0028] As can be seen from the above, by installing the above cold storage air conditioner, the warehouse has a better utilization rate. At the same time, the cold storage system has the function of cooling or heating the warehouse to meet different usage requirements, which improves the practicality of the cold storage. In addition, with the spacing design of the indoor heat exchanger for the cold storage, the defrosting time can be greatly reduced while achieving thermal fluorine defrosting, thereby reducing the ambient temperature fluctuation in the warehouse during defrosting, and at the same time, it can also improve the refrigeration effect of the warehouse. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is the structural diagram of the existing cold storage internal machine.

[0030] Figure 2 It is a structural diagram of an embodiment of a cold storage internal machine of the utility model.

[0031] Figure 3 It is an exploded schematic diagram of an embodiment of a cold storage internal machine of the utility model.

[0032] Figure 4 It is a structural schematic diagram of an indoor heat exchanger for a cold storage in an embodiment of the cold storage internal machine of the utility model.

[0033] Figure 5 It is a partial structural diagram of an indoor heat exchanger for a cold storage in an embodiment of the cold storage internal machine of the utility model.

[0034] Figure 6 It is a partial structural schematic diagram of an indoor heat exchanger for cold storage after omitting some components of an embodiment of the cold storage internal machine of the utility model.

[0035] Figure 7 It is a structural diagram of the output pipe of an embodiment of a cold storage internal machine of the utility model.

[0036] Figure 8 It is a structural diagram of the input pipe of an embodiment of a cold storage internal machine of the utility model.

[0037] Fig. 9 It is a cross-sectional schematic diagram of an indoor heat exchanger for a cold storage in an embodiment of the cold storage internal machine of the utility model.

[0038] Fig.10 It is a structural diagram of an extension module of an indoor heat exchanger for a cold storage in an embodiment of the cold storage internal machine of the utility model.

[0039] Fig.11 yes Fig. 9 Enlarged view of point A in the middle.

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0041] Cold storage internal machine embodiment

[0042] Combination Figure 2 and Figure 3 The cold storage internal machine 100 includes a first machine box 1, an indoor heat exchanger 2 for cold storage, a mesh cover 3 and a fan module 4. The first machine box 1 has a first air outlet 11 and a first air return port 12, and the first air outlet 11 and the first air return port 12 are preferably distributed along the thickness direction of the first machine box 1; the indoor heat exchanger 2 for cold storage is arranged in the first machine box 1, and the indoor heat exchanger 2 for cold storage is located between the first air outlet 11 and the first air return port 12; the fan module 4 is arranged in the first machine box 1, and the fan module 4 is located between the indoor heat exchanger 2 for cold storage and the first air outlet 11; the mesh cover 3 is installed on the first machine box 1, and the mesh cover 3 is located at the first air outlet 11 and covers the first air outlet 11.

[0043] Preferably, the mesh cover 3 has a guide strip 31, so that the mesh cover 3 can better discharge the wind blown by the fan module 4 evenly into the warehouse. Among them, the mesh cover 3 is preferably made of low-temperature resistant materials, such as polyethylene (PE), polypropylene (PP), polytetrafluoroethylene (PRFE), polyamide (PA) or polyetheretherketone (PEEK) materials, so that the mesh cover 3 is light and can be better applied to the low temperature and ultra-low temperature environment in the warehouse, so as to ensure the service life and working reliability of the mesh cover 3, and is conducive to reducing the weight of the cold storage internal machine 100.

[0044] Combination Figure 4 and Figure 5 The indoor heat exchanger 2 for cold storage includes a plurality of fins 21 and a heat exchange tube assembly 22. The plurality of fins 21 are distributed along the thickness direction thereof, and the plurality of fins 21 are preferably distributed along the length direction of the first chassis 1, wherein the spacing W between two adjacent fins 21 is less than or equal to 2 mm. For example, in this embodiment, the spacing W between two adjacent fins 21 is equal to 2 mm. By designing the spacing of the fins 21, the volume of the indoor heat exchanger 2 for cold storage can be reduced by more than half compared with the volume of the indoor heat exchanger for conventional cold storage under the condition of achieving the same required heat exchange area, thereby making the volume of the cold storage indoor machine 100 smaller, which is conducive to improving the utilization rate of the warehouse equipped with the cold storage indoor machine 100.

[0045] The heat exchange tube assembly 22 preferably includes a multi-component flow tube 221, an input tube 222 and an output tube 223. Figure 6 As shown, the multi-group shunt pipes 221 are distributed along the length direction of the fins 21, and the shunt pipes 221 extend in a winding shape and penetrate each fin 21, which is beneficial to improving the heat exchange effect of the indoor heat exchanger 2 for cold storage. Through the design of the shunt pipes 221, the uniformity of the heat exchange of the refrigerant can be effectively improved, thereby making the evaporation temperature of the indoor heat exchanger 2 for cold storage more uniform.

[0046] The input pipe 222 has a first input port 22211 and a plurality of flow distribution output ports 22241; wherein the plurality of flow distribution output ports 22241 correspond one-to-one to the plurality of flow distribution pipes 221, so that one flow distribution output port 22241 is connected to the second input port 2211 of the corresponding group of flow distribution pipes 221. Figure 7 The output tube 223 has a first output port 2231 and a plurality of flow diversion input ports 2232 ; wherein the plurality of flow diversion input ports 2232 correspond one-to-one to the plurality of flow diversion tubes 221 , so that one flow diversion input port 2232 is connected to the second output port 2212 of the corresponding group of flow diversion tubes 221 .

[0047] Preferably, the heat exchange tube assembly 22 further includes an electronic pressure regulating valve 224 and a capillary tube 225. Figure 8 The input pipe 222 preferably includes a first input section 2221, a second input section 2222, a main flow section 2223 and a plurality of diversion sections 2224. The first end of the first input section 2221 is the first input port 22211 mentioned above, and the second end of the first input section 2221 is connected to the inlet of the electronic pressure regulating valve 224; the first end of the second input section 2222 is connected to the outlet of the electronic pressure regulating valve 224, and the second end of the second input section 2222 is connected to the main flow section 2223; the first end of the diversion section 2224 is connected to the main flow section 2223, and the second end of the diversion section 2224 is the diversion outlet 22241 mentioned above; the first end of the capillary tube 225 is connected to the first input section 2221, and the second end of the capillary tube 225 is connected to the second input section 2222. This design enables the indoor heat exchanger 2 for cold storage to cooperate with refrigerants, compressors, etc. to achieve low-temperature and ultra-low-temperature refrigeration, thereby improving the refrigeration range and refrigeration capacity of the indoor heat exchanger 2 for cold storage.

[0048] For example, when the cold storage indoor unit 100 works in a relatively low temperature working environment, the opening of the electronic pressure regulating valve 224 can be controlled so that the pressure of the refrigerant in the first input section 2221 and the second input section 2222 remain consistent or close. At this time, the refrigerant does not flow through the capillary 225; when the cold storage indoor unit 100 works in an ultra-low temperature working environment, the opening of the electronic pressure regulating valve 224 can be controlled so that the refrigerant pressure in the first input section 2221 is greater than the refrigerant pressure in the second input section 2222, thereby causing a portion of the refrigerant in the first input section 2221 to flow to the second input section 2222 through the electronic pressure regulating valve 224, and the other portion of the refrigerant flows through the capillary 225. The capillary 225 flows to the second input section 2222, and the refrigerant flowing through the capillary 225 will be further throttled by the capillary 225 to further reduce the pressure and temperature of the refrigerant, so that when the refrigerant flowing through the capillary 225 and the refrigerant flowing through the electronic pressure regulating valve 224 are combined in the second input section 2222, the pressure and temperature of the combined refrigerant are lower, so that the indoor heat exchanger 2 for the cold storage has a lower evaporation temperature; at the same time, because the refrigerant in the first input section 2221 enters the second input section 2222 through the electronic pressure regulating valve 224 and the capillary 225 respectively, it is ensured that the flow of the refrigerant can meet the evaporation temperature requirement of the indoor heat exchanger 2 for the cold storage. After the refrigerant flows into the second input section 2222, the combined refrigerant will flow to each branch section 2224 through the main section 2223, and then flow to each branch pipe 221 through each branch section 2224, and then flow to the output pipe 223 through the branch pipe 221 and the branch input port 2232, and finally be discharged from the indoor heat exchanger 2 for the cold storage through the first output port 2231 of the output pipe 223.

[0049] Furthermore, the fin 21 is preferably made of copper, aluminum or stainless steel; the shunt pipe 221 is preferably made of copper, aluminum or stainless steel; the input pipe 222 is preferably made of copper, aluminum or stainless steel; and the output pipe 223 is preferably made of copper, aluminum or stainless steel. By setting the materials of the fin 21, the shunt pipe 221, the output pipe 223 and the output pipe 223, the heat exchange effect of the indoor heat exchanger 2 for cold storage can be effectively guaranteed. Among them, the indoor heat exchanger 2 for cold storage can also be applied to cold storage air conditioners with cooling mode and heating mode, so as to realize thermal fluorine defrosting in conjunction with the spacing design of the fin 21, so as to greatly reduce the defrosting time and reduce the fluctuation of the ambient temperature in the warehouse.

[0050] Combination Fig. 9 and Fig.10 The fan module 4 is used to supply air to the first air outlet 11 to accelerate the air circulation in the warehouse to the first return air outlet 12, the indoor heat exchanger 2 for the cold storage, and the first air outlet 11. The fan module 4 preferably includes a bracket 41, a drive motor 42 and a fan blade 43.

[0051] The bracket 41 is installed in the first chassis 1. The bracket 41 preferably has a main body 411, a first connecting portion 412 and a second connecting portion 413. The first connecting portion 412 is located at the top of the main body 411, and the first connecting portion 412 extends from the main body 411 towards the first air outlet 11. The first connecting portion 412 is connected to the front panel of the first chassis 1, and the first connecting portion 412 preferably also abuts against the top of the first chassis 1 to enhance the stability of the bracket 41 after installation. The second connecting portion 413 is located at the bottom of the main body 411, and the second connecting portion 413 is used to connect to the water receiving tray 13 at the bottom of the first chassis 1 to further fix the bracket 41 in the first chassis 1; wherein, the water receiving tray 13 is located at the bottom of the indoor heat exchanger 2 for cold storage to receive the condensed water dripping from the indoor heat exchanger 2 for cold storage, and discharge the condensed water out of the storage through the drain port and the drain pipe.

[0052] Combined Fig.11 , preferably, the bracket 41 further has a clamping portion 414, which is located at the top of the main body 411, and the main body 411 is located between the first connecting portion 412 and the clamping portion 414. The clamping portion 414 preferably has a connecting piece 4141, a first elastic piece 4142 and a second elastic piece 4143. The connecting piece 4141 is connected between the first elastic piece 4142 and the second elastic piece 4143, and the first elastic piece 4142 and the second elastic piece 4143 are distributed along the axial direction of the first air outlet 11 (i.e., the thickness direction of the first chassis 1), so that the connecting piece 4141, the first elastic piece 4142 and the second elastic piece 4143 are generally in an inverted "U" shape, that is, a clamping position with an opening downward is formed between the connecting piece 4141, the first elastic piece 4142 and the second elastic piece 4143. When the bracket 41 is installed in the first chassis 1, the indoor heat exchanger 2 for cold storage is clamped in the clamping position formed by the clamping portion 414; the setting of the clamping portion 414 enables the bracket 41 to be cooperatively connected with the indoor heat exchanger 2 for cold storage after the bracket 41 is installed in the first chassis 1, which is beneficial to the stability and firmness of the bracket 41 after installation, and can also ensure the stability and firmness of the installation of the indoor heat exchanger 2 for cold storage.

[0053] The driving motor 42 is installed on the main body 411 of the bracket 41; preferably, a first damping element is provided between the driving motor 42 and the main body 411, a second damping element is provided between the first connecting portion 412 and the first chassis 1, and a third damping element is provided between the second connecting portion 413 and the first chassis 1. The first damping element, the second damping element and the third damping element can absorb the vibration generated during the operation of the fan module 4 to further reduce the vibration and noise generated during the operation of the fan module 4; wherein, the first damping element, the second damping element and the third damping element preferably can adopt damping rubber pads or damping sponges.

[0054] The fan blades 43 are mounted on the drive shaft of the drive motor 42, so that the drive motor 42 can drive the fan blades 43 to deliver air to the first air outlet 11. Preferably, the fan blades 43 are preferably made of low-temperature resistant materials, such as polyethylene, polypropylene, polytetrafluoroethylene, polyamide or polyetheretherketone materials, so that the fan blades 43 are light in weight and can be better applied to the low temperature and ultra-low temperature environment in the warehouse, so as to ensure the service life and working reliability of the fan blades 43, and at the same time, it is also conducive to further reducing the weight of the cold storage internal machine 100.

[0055] In addition, the number of first air outlets 11 is between 1 and 8; the number of mesh covers 3 is between 1 and 8, and one mesh cover 3 is installed at one first air outlet 11; the number of fan modules 4 is between 1 and 8, and one fan module 4 is arranged to match one first air outlet 11. This design allows the cold storage machine 100 to be set to different horsepower specifications, so that the cold storage machine 100 can be suitable for warehouses of different sizes, and can ensure that the warehouse space occupied by the cold storage machine 100 is better reduced while meeting the refrigeration demand in the warehouse. For example, in this embodiment, the number of first air outlets 11 is 2, the number of mesh covers 3 is 2, and the number of fan modules 4 is 2.

[0056] In summary, it can be seen that by designing the cold storage indoor unit 100 and the indoor heat exchanger 2 for the cold storage, their volume is reduced, thereby improving the utilization rate of the warehouse; at the same time, the cold storage indoor unit 100 can be suitable for cold storage air conditioners with cooling mode and heating mode, so as to achieve thermal fluorine defrosting in conjunction with the spacing design of the fins 21, and can greatly reduce the defrosting time to reduce the ambient temperature fluctuation in the warehouse during defrosting; in addition, the cold storage indoor unit 100 can also ensure the uniformity of refrigerant heat exchange, thereby improving the refrigeration effect of the cold storage indoor unit 100.

[0057] Cold storage air conditioning example

[0058] The cold storage air conditioner includes a cold storage outdoor unit and a cold storage indoor unit described in the above cold storage indoor unit embodiment. Among them, the cold storage outdoor unit includes a second chassis, an outdoor heat exchanger, a compressor, an expansion valve, a four-way valve, an outdoor fan and a controller, the second chassis has a second air outlet and a second return air outlet, the outdoor heat exchanger is arranged in the chassis and is located between the second air outlet and the second return air outlet, the compressor, the expansion valve and the four-way valve are all arranged in the second chassis, the air outlet of the compressor is connected to the input port of the four-way valve, the air return port of the compressor is connected to the output port of the four-way valve, the first connector of the outdoor heat exchanger is connected to the first interface of the expansion valve, the second connector of the outdoor heat exchanger is connected to the first transfer port of the four-way valve, the outdoor fan is arranged in the second chassis and is located between the outdoor heat exchanger and the second air outlet, and the controller is electrically connected to the compressor, the expansion valve, the four-way valve, the outdoor fan and the electronic expansion valve respectively. In addition, the first input port of the input pipe of the cold storage indoor heat exchanger of the cold storage unit is connected to the second interface of the expansion valve, and the first output port of the output pipe is connected to the second transfer port of the four-way valve. When the air outlet is connected to the first transfer port, the return air port is connected to the second transfer port; when the air outlet is connected to the second transfer port, the return air port is connected to the first transfer port.

[0059] By setting the above-mentioned cold storage internal unit, the cold storage air conditioner can better improve the utilization rate of the warehouse. At the same time, the cold storage air conditioner can also have a cooling mode and a heating mode to improve the practicality of the cold storage air conditioner; at the same time, in conjunction with the fin spacing design, thermal fluorine defrosting can be achieved, and the defrosting time can be greatly reduced, thereby reducing the ambient temperature fluctuation in the warehouse during defrosting, and the refrigeration effect of the cold storage internal unit can also be improved.

[0060] Cold storage system implementation

[0061] The cold storage system includes a storeroom and the cold storage air conditioner in the above cold storage air conditioner embodiment; wherein, the cold storage internal unit is arranged in the storeroom, and the cold storage external unit is arranged outside the storeroom. The cold storage system makes the storeroom have a better utilization rate by arranging the above cold storage air conditioner. At the same time, the cold storage system has the function of cooling or heating the storeroom to meet different usage requirements, thereby improving the practicality of the cold storage. In addition, in conjunction with the spacing design of the indoor heat exchanger for the cold storage, the defrosting time can be greatly reduced while achieving thermal fluorine defrosting, thereby reducing the ambient temperature fluctuation in the storeroom during defrosting, and at the same time, the refrigeration effect of the storeroom can be improved.

[0062] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An indoor heat exchanger for a cold storage, comprising a plurality of fins, wherein the plurality of fins are distributed along the thickness direction of the fins, and characterized in that: The distance between two adjacent fins is less than or equal to 2 mm; The indoor heat exchanger for the cold storage also includes a heat exchange tube assembly, which includes multiple groups of diverter tubes, input tubes and output tubes. The multiple groups of diverter tubes are distributed along the length direction of the fins. The diverter tubes are winding and pass through the fins. The input tube has a first input port and multiple diverter output ports. The multiple diverter output ports correspond one-to-one to the multiple groups of diverter tubes. One diverter output port is connected to the second input port of a corresponding group of diverter tubes. The output tube has a first output port and multiple diverter input ports. The multiple diverter input ports correspond one-to-one to the multiple groups of diverter tubes. One diverter input port is connected to the second output port of a corresponding group of diverter tubes.

2. The indoor heat exchanger for cold storage according to claim 1, characterized in that: The heat exchange tube assembly also includes an electronic pressure regulating valve and a capillary tube; The input pipe includes a first input section, a second input section, a main flow section and a plurality of diversion sections, wherein the first end of the first input section is the first input port, the second end of the first input section is connected to the inlet of the electronic pressure regulating valve, the first end of the second input section is connected to the outlet of the electronic pressure regulating valve, the second end of the second input section is connected to the main flow section, the first end of the diversion section is connected to the main flow section, the second end of the diversion section is the diversion outlet, the first end of the capillary is connected to the first input section, and the second end of the capillary is connected to the second input section.

3. The indoor heat exchanger for cold storage according to claim 1 or 2, characterized in that: The fins are made of copper, aluminum or stainless steel; The shunt pipe is made of copper, aluminum or stainless steel; The input pipe is made of copper, aluminum or stainless steel; The output pipe is made of copper, aluminum or stainless steel.

4. Cold storage internal machines, including: A first chassis, the first chassis having a first air outlet and a first air return outlet; A mesh cover, the mesh cover is installed at the first air outlet and covers the first air outlet; A fan module, wherein the fan module is disposed in the first chassis, the fan module is located between the first air outlet and the first air return outlet, and the fan module supplies air to the first air outlet; Features: The cold storage internal unit also includes the indoor heat exchanger for cold storage as described in any one of claims 1 to 3, and the indoor heat exchanger for cold storage is arranged in the first chassis, and the indoor heat exchanger for cold storage is located between the first return air outlet and the fan module.

5. The cold storage internal machine according to claim 4, characterized in that: The fan module comprises: a bracket, the bracket being installed in the first chassis; A driving motor, wherein the driving motor is mounted on the bracket; The fan blades are mounted on the driving shaft of the driving motor.

6. The cold storage internal machine according to claim 5, characterized in that: The bracket has a clamping portion, which is located between the main body of the bracket and the indoor heat exchanger for the cold storage. The clamping portion has a connecting piece, a first spring piece and a second spring piece. The connecting piece is connected between the first spring piece and the second spring piece. The first spring piece and the second spring piece are distributed along the axial direction of the first air outlet. A clamping position is formed between the connecting piece, the first spring piece and the second spring piece, and the indoor heat exchanger for the cold storage is clamped in the clamping position.

7. The cold storage internal machine according to claim 5, characterized in that: The mesh cover is made of polyethylene, polypropylene, polytetrafluoroethylene, polyamide or polyetheretherketone; The fan blades are made of polyethylene, polypropylene, polytetrafluoroethylene, polyamide or polyetheretherketone.

8. The cold storage internal machine according to any one of claims 4 to 7, characterized in that: The number of the first air outlets is between 1 and 8; The number of the mesh covers is between 1 and 8, and one mesh cover is installed at one of the first air outlets; The number of the fan modules is between 1 and 8, and one fan module is matched with one first air outlet.

9. A cold storage air conditioner, including a cold storage outdoor unit, wherein the cold storage outdoor unit includes: A second chassis, the second chassis having a second air outlet and a second air return outlet; an outdoor heat exchanger, the outdoor heat exchanger being disposed in the chassis and located between the second air outlet and the second air return outlet; A compressor, an expansion valve and a four-way valve, wherein the compressor, the expansion valve and the four-way valve are all arranged in the second chassis, the air outlet of the compressor is connected to the input port of the four-way valve, the air return port of the compressor is connected to the output port of the four-way valve, the first connector of the outdoor heat exchanger is connected to the first interface of the expansion valve, and the second connector of the outdoor heat exchanger is connected to the first transfer port of the four-way valve; an outdoor fan, the outdoor fan being arranged in the second housing and between the outdoor heat exchanger and the second air outlet; Features: The cold storage air conditioner also includes a cold storage internal unit as claimed in any one of claims 4 to 8, wherein the first input port is connected to the second interface of the expansion valve, and the first output port is connected to the second transfer port of the four-way valve; When the air outlet is connected to the first transfer port, the air return port is connected to the second transfer port; When the air outlet is connected to the second transfer port, the air return port is connected to the first transfer port.

10. A cold storage system, including a storeroom, characterized in that: It also includes the cold storage air conditioner as described in claim 9, wherein the cold storage internal unit is arranged in the warehouse, and the cold storage external unit is arranged outside the warehouse.

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