Refrigeration device and refrigeration system

Abstract

A refrigeration device and a refrigeration system, which relate to the field of refrigeration technology, are used for cooling the outer wall of a building, and include a first air duct, a second air duct and a circulating medium. The first air duct is arranged on the outer wall of the building, and the second air duct is arranged in the exhaust duct of the building. The first air duct and the second air duct are connected to form a circulating air duct, and the circulating medium circulates in the circulating air duct to exchange heat between the outer wall and the inner wall of the building. The refrigeration device and the refrigeration system have a good refrigeration effect and can achieve the purpose of energy saving of the building.

Description

Technical Field

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

[0002] With the continuous acceleration of urban modernization, people's living standards and living standards are constantly improving. How to further improve living comfort, reduce building energy consumption, improve energy utilization, and accelerate the pace of building energy conservation has become the focus of attention of the government and all sectors of society. In the existing technology, building energy conservation mainly adopts passive energy conservation, that is, by increasing the number of structural layers of the building wall, thereby increasing the thermal resistance of the building wall, and then achieving the effect of reducing the inner surface temperature of the wall.

[0003] Although the above-mentioned method of increasing the number of structural layers of the building wall can reduce the temperature rise of the wall surface inside the building caused by solar radiation to a certain extent, it cannot fundamentally solve the problem of building energy conservation. The main reasons are as follows: First, solar radiation and other factors increase the energy entering the building, and the wall structure improvement technology that belongs to passive insulation cannot take away this heat, resulting in heat enrichment; Second, although increasing the number of structural layers of the building wall and adopting composite structures can increase the thermal resistance of the building wall and reduce the inner surface temperature of the wall, it also increases the difficulty of heat dissipation from the indoor to the outside. At the same time, the heat storage capacity of the wall also increases, further increasing the difficulty of building environmental control. Summary of the invention

[0004] The object of the present invention is to provide a refrigeration device and a refrigeration system, which have a good refrigeration effect and can achieve the purpose of energy saving in buildings.

[0005] The embodiment of the present invention is achieved as follows:

[0006] In one aspect of an embodiment of the present invention, a refrigeration device is provided for cooling the outer wall of a building, comprising a first air duct, a second air duct and a circulating medium, wherein the first air duct is arranged on the outer wall of the building, the second air duct is arranged in the exhaust duct of the building, the first air duct and the second air duct are connected to form a circulating air duct, and the circulating medium circulates in the circulating air duct to exchange heat between the outer wall and the inner wall of the building. The refrigeration device has a good refrigeration effect and can achieve the purpose of energy saving of the building.

[0007] Optionally, it also includes a compressor, a cooler, an expander and a heat exchanger, wherein the compressor, the cooler and the expander are respectively configured in the equipment room of the building, the heat exchanger is arranged in the first air duct, the first outlet of the second air duct is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the expander through the cooler, the outlet of the expander is connected to the second inlet of the second air duct, the second outlet of the second air duct is connected to the first inlet of the second air duct through the first air duct, the compressor is used to adiabatically compress the circulating working fluid, the cooler is used to cool the circulating working fluid, the expander is used to adiabatically expand the circulating working fluid, and the heat exchanger is used to absorb heat from the circulating working fluid at a constant pressure.

[0008] Optionally, the coolant of the cooler includes domestic water.

[0009] Optionally, the second air duct includes a first pipe assembly and a second pipe assembly, the first pipe assembly includes a first main pipe and multiple first branch pipe groups, the second pipe assembly includes a second main pipe and multiple second branch pipe groups, the first main pipe and the second main pipe are respectively arranged in the exhaust duct in the vertical direction of the building, and the first branch pipe group and the second branch pipe group are respectively arranged in the exhaust duct in the horizontal direction of the building; wherein, the outlets of multiple first branch pipe groups are respectively connected to the inlet of the first main pipe, the outlet of the first main pipe is connected to the inlet of the compressor, the outlet of the expander is connected to the inlet of the second main pipe, the outlet of the second main pipe is respectively connected to the inlet of multiple second branch pipe groups, and the outlets of the second branch pipe groups in the horizontal exhaust ducts of two adjacent buildings are connected to the inlet of the first branch pipe group through the first air duct.

[0010] Optionally, the first branch pipe group includes a plurality of first branch pipes, the second branch pipe group includes a plurality of second branch pipes, the first branch pipes and the second branch pipes are arranged in a staggered manner, and adjacent first branch pipes and second branch pipes are connected through the first air duct.

[0011] Optionally, it also includes a controller and a first temperature sensor, a second temperature sensor and a solenoid valve electrically connected to the controller respectively, wherein the first temperature sensor is arranged on the outer wall of the building, and is used to obtain a first temperature value of the outer wall of the building; the second temperature sensor is arranged in the exhaust duct of the building, and is used to obtain a second temperature value of the inner wall of the building; the solenoid valve is arranged on the second air duct, and is used to control the on and off of the second air duct; the controller calculates the actual temperature difference between the outer wall and the inner wall of the building according to the first temperature value and the second temperature value, and compares the actual temperature difference with the preset temperature difference to control the start and stop of the solenoid valve.

[0012] Optionally, the first temperature sensor, the second temperature sensor and the solenoid valve each include a plurality of first temperature sensors evenly distributed along the outer wall of the building, a plurality of second temperature sensors evenly distributed along the inner wall of the building, and a plurality of solenoid valves are arranged in a one-to-one correspondence with a plurality of second branches of the second air duct.

[0013] Optionally, the circulating working fluid is carbon dioxide.

[0014] Optionally, a diverter plate is provided in the second air duct.

[0015] Another aspect of the present invention provides a refrigeration system, including a building and the above-mentioned refrigeration device, wherein the first air duct of the refrigeration device is arranged on the outer wall of the building, and the second air duct of the refrigeration device is arranged in the exhaust duct of the building. The refrigeration device has a good refrigeration effect and can achieve the purpose of energy saving of the building.

[0016] The beneficial effects of the embodiments of the present invention include:

[0017] The refrigeration device includes a first air duct, a second air duct and a circulating medium. The first air duct is configured on the outer wall of the building so that the circulating medium generates heat exchange with the outer wall of the building when flowing through the first air duct. The second air duct is configured in the exhaust duct of the building so that the circulating medium generates heat exchange with the inner wall of the building when flowing through the second air duct. The first air duct and the second air duct are connected to form a circulating air duct to connect the outer wall of the building with the inner wall of the building. The circulating medium circulates in the circulating air duct, so that the outer wall of the building and the inner wall of the building can exchange heat. Since the outer wall of the building is often exposed to the sun and has a higher temperature, while the inner wall of the building is not exposed to the sun and has a lower temperature, the temperature of the outer wall of the building can be reduced by the refrigeration device. Compared with the method of increasing the number of structural layers of the wall of the building in the prior art, the method of heat exchange through the outer wall and the inner wall of the building provided by the present application increases the thermal resistance between the outer wall and the inner wall by increasing the convective heat transfer on the one hand, and reduces the temperature of the inner wall by cooling the circulating medium on the other hand. Therefore, the refrigeration device can not only lower the temperature of the outer wall of the building, but also bring the heat of the outer wall of the building to the inner wall of the building for exchange, thereby avoiding heat enrichment of the outer wall of the building. In addition, it can also bring the heat of the inner wall of the building to the outer wall of the building for heat dissipation, thereby making the ambient temperature of the building easy to control, thereby achieving the purpose of energy saving in the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 One of the structural schematic diagrams of the refrigeration system provided by the embodiment of the present invention;

[0020] Figure 2 A second structural diagram of a refrigeration system provided in an embodiment of the present invention;

[0021] Figure 3 A third structural diagram of a refrigeration system provided in an embodiment of the present invention;

[0022] Figure 4 A fourth structural diagram of a refrigeration system provided in an embodiment of the present invention;

[0023] Figure 5 The fifth structural schematic diagram of the refrigeration system provided in the embodiment of the present invention.

[0024] Icons: 100-refrigeration device; 10-first air duct; 20-second air duct; 21-first pipe assembly; 211-first main pipe; 212-first branch pipe group; 2121-first branch pipe; 22-second pipe assembly; 221-second main pipe; 222-second branch pipe group; 2221-second branch pipe; 30-compressor; 40-cooler; 50-expander; 60-controller; 61-first temperature sensor; 62-second temperature sensor; 63-solenoid valve; 70-dividing plate; 200-building; 210-exhaust duct; 300-refrigeration system. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a connection between 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.

[0031] Please refer to Figures 1 to 3 This embodiment provides a refrigeration system 300, including a building 200 and a refrigeration device 100, wherein a first air duct 10 of the refrigeration device 100 is disposed on an outer wall of the building 200, and a second air duct 20 of the refrigeration device 100 is disposed in an exhaust duct 210 of the building 200. The refrigeration device 100 is used to cool down the outer wall of the building 200.

[0032] It should be noted that, first, the building 200 here may include a shopping mall, an office building or a residential building, etc. Generally, the exhaust ducts 210 of the above buildings 200 include at least one vertical exhaust duct 210 and at least one horizontal exhaust duct 210. Taking a residential building as an example, at least one vertical exhaust duct 210 is arranged somewhere in a certain building space, running through each floor space, and at least one horizontal exhaust duct 210 is arranged above the ceiling and / or below the floor of a certain floor space, and the horizontal exhaust duct 210 is connected to the vertical exhaust duct 210.

[0033] Second, regarding the number of vertical exhaust ducts 210 and horizontal exhaust ducts 210, for example, when the floor area of ​​the building 200 is small, there can be one vertical exhaust duct 210, and when the floor area and / or floor height of the building 200 is large, there can be multiple horizontal exhaust ducts 210. Technical personnel in this field should be able to make reasonable selections and designs based on actual needs, and no specific restrictions are made here.

[0034] Specifically, Figures 1 to 3 As shown, the refrigeration device 100 includes a first air duct 10, a second air duct 20 and a circulating medium. The first air duct 10 is arranged on the outer wall of the building 200, and the second air duct 20 is arranged in the exhaust duct 210 of the building 200. The first air duct 10 and the second air duct 20 are connected to form a circulating air duct. The circulating medium circulates in the circulating air duct to exchange heat between the outer wall and the inner wall of the building 200. The refrigeration device 100 has a good refrigeration effect and can achieve the purpose of energy saving of the building 200.

[0035] It should be noted that, first, the first air duct 10 is configured on the outer wall of the building 200. In other words, the first air duct 10 is configured on the surface of the outer wall of the building 200. For example, the first air duct 10 can be set on each outer wall of the building 200, and can also be arranged around each window on the surface of the outer wall of the building 200 to increase the surface heat exchange area between the refrigeration device 100 and the outer wall of the building 200, thereby improving the heat exchange effect between the outer wall and the inner wall of the building 200. Of course, in other embodiments, those skilled in the art can also make reasonable selections and designs based on the main requirements of arrangement rules and ease of implementation.

[0036] The second air duct 20 is arranged in the exhaust duct 210 of the building 200. In other words, the second air duct 20 is arranged inside the wall of the building 200. For example, the second air duct 20 can be arranged inside the vertical exhaust duct 210 of the building 200 and / or the horizontal exhaust duct 210 of the building 200 to avoid the second air duct 20 affecting the neatness and aesthetics of the interior of the building 200, and to improve the utilization rate of the exhaust duct 210 of the building 200. It should be understood by those skilled in the art that Figures 1 to 3 It is only for illustration and is not used to limit the actual arrangement of the first air duct 10 and the second air duct 20 .

[0037] Second, the first air duct 10 is arranged on the outer wall of the building 200 so that the circulating medium exchanges heat with the outer wall of the building 200 when flowing through the first air duct 10, and the second air duct 20 is arranged in the exhaust duct 210 of the building 200 so that the circulating medium exchanges heat with the inner wall of the building 200 when flowing through the second air duct 20. The first air duct 10 and the second air duct 20 are connected to form a circulating air duct to connect the outer wall of the building 200 with the inner wall of the building 200, and the circulating medium circulates in the circulating air duct, so that the outer wall of the building 200 and the inner wall of the building 200 can exchange heat. Since the outer wall of the building 200 is often exposed to the sun and has a higher temperature, while the inner wall of the building 200 is not exposed to the sun and has a lower temperature, the temperature of the outer wall of the building 200 can be reduced by the refrigeration device 100.

[0038] Compared with the method of increasing the number of structural layers of the wall of the building 200 in the prior art, the method of heat exchange through the outer wall and the inner wall of the building 200 provided in the present application increases the thermal resistance between the outer wall and the inner wall by increasing the convective heat transfer on the one hand, and reduces the temperature of the inner wall by cooling the circulating working medium on the other hand. Therefore, the refrigeration device 100 can not only reduce the temperature of the outer wall of the building 200, but also bring the heat of the outer wall of the building 200 to the inner wall of the building 200 for exchange, thereby avoiding the heat enrichment of the outer wall of the building 200. In addition, it can also bring the heat of the inner wall of the building 200 to the outer wall of the building 200 for heat dissipation, so that the ambient temperature of the building 200 is easy to control, thereby achieving the purpose of energy saving of the building 200.

[0039] At the same time, the method of heat exchange through the outer wall and inner wall of the building 200 provided in the present application only adds a first air duct 10 on the outer wall of the building 200. Compared with the method of increasing the number of structural layers of the wall of the building 200 in the prior art, it can avoid increasing the thickness, volume and number of covering layers of the outer wall of the building 200 as much as possible.

[0040] As described above, the refrigeration device 100 includes a first air duct 10, a second air duct 20 and a circulating medium. The first air duct 10 is arranged on the outer wall of the building 200 so that the circulating medium exchanges heat with the outer wall of the building 200 when flowing through the first air duct 10. The second air duct 20 is arranged in the exhaust duct 210 of the building 200 so that the circulating medium exchanges heat with the inner wall of the building 200 when flowing through the second air duct 20. The first air duct 10 and the second air duct 20 are connected to form a circulating air duct so that the outer wall of the building 200 and the inner wall of the building 200 are connected. The circulating medium circulates in the circulating air duct so that the outer wall of the building 200 and the inner wall of the building 200 can exchange heat. Since the outer wall of the building 200 is often exposed to the sun and has a higher temperature, while the inner wall of the building 200 is not exposed to the sun and has a lower temperature, the temperature of the outer wall of the building 200 can be reduced by the refrigeration device 100. Compared with the method of increasing the number of structural layers of the wall of the building 200 in the prior art, the method of heat exchange through the outer wall and the inner wall of the building 200 provided in the present application increases the thermal resistance between the outer wall and the inner wall by increasing the convective heat transfer on the one hand, and reduces the temperature of the inner wall by cooling the circulating working medium on the other hand. Therefore, the refrigeration device 100 can not only reduce the temperature of the outer wall of the building 200, but also bring the heat of the outer wall of the building 200 to the inner wall of the building 200 for exchange, thereby avoiding the heat enrichment of the outer wall of the building 200. In addition, it can also bring the heat of the inner wall of the building 200 to the outer wall of the building 200 for heat dissipation, so that the ambient temperature of the building 200 is easy to control, thereby achieving the purpose of energy saving of the building 200.

[0041] like Figure 1 As shown, in this embodiment, the refrigeration device 100 also includes a compressor 30, a cooler 40, an expander 50 and a heat exchanger. The compressor 30, the cooler 40 and the expander 50 are respectively configured in the equipment room of the building 200, the heat exchanger is arranged in the first air duct 10, the first outlet of the second air duct 20 is connected to the inlet of the compressor 30, the outlet of the compressor 30 is connected to the inlet of the expander 50 through the cooler 40, the outlet of the expander 50 is connected to the second inlet of the second air duct 20, the second outlet of the second air duct 20 is connected to the first inlet of the second air duct 20 through the first air duct 10, the compressor 30 is used for adiabatically compressing the circulating working fluid, the cooler 40 is used for cooling the circulating working fluid, the expander 50 is used for adiabatically expanding the circulating working fluid, and the heat exchanger is used for absorbing heat from the circulating working fluid at a constant pressure.

[0042] It should be noted that, first, the compressor 30, the cooler 40, the expander 50 and the heat exchanger can all be products on sale in the existing technology, and no improvement is made to the compressor 30, the cooler 40, the expander 50 and the heat exchanger. As long as the compressor 30 can adiabatically compress the circulating working fluid, the cooler 40 can cool the circulating working fluid, the expander 50 can adiabatically expand the circulating working fluid, and the heat exchanger can absorb heat from the circulating working fluid at a constant pressure, the actual structure of the compressor 30, the cooler 40, the expander 50 and the heat exchanger will not be explained in detail here.

[0043] Second, the low-temperature and low-pressure circulating medium absorbs heat at a constant pressure and rises in temperature in the first air duct 10 of the outer wall of the building 200, then enters the compressor 30, is adiabatically compressed to increase the pressure, and at the same time the temperature rises, then enters the cooler 40, is cooled by the coolant of the cooler 40, and then enters the expander 50. The compressed and cooled circulating medium is adiabatically expanded in the expander 50, the pressure is reduced and the temperature is also reduced, and the low-temperature circulating medium is introduced into the heat exchanger in the first air duct 10, and absorbs heat at a constant pressure in the heat exchanger. After absorbing heat and rising in temperature, the circulating medium is sucked into the compressor 30 for a new cycle. Through the above-mentioned circulation process, the refrigeration device 100 can cool the surface of the outer wall of the building 200 and block the outside from dissipating heat to the inside of the inner wall of the building 200.

[0044] Optionally, the coolant of the cooler 40 includes domestic water to improve the utilization rate of domestic water, thereby achieving the purpose of environmental protection and energy saving.

[0045] like Figure 1 and Figure 3 As shown, specifically, in this embodiment, the second air duct 20 includes a first pipe assembly 21 and a second pipe assembly 22, the first pipe assembly 21 includes a first main pipe 211 and a plurality of first branch pipe groups 212, the second pipe assembly 22 includes a second main pipe 221 and a plurality of second branch pipe groups 222, the first main pipe 211 and the second main pipe 221 are respectively arranged in the exhaust duct 210 in the vertical direction of the building 200, the first branch pipe group 212 and the second branch pipe group 222 are respectively arranged in the exhaust duct 210 in the horizontal direction of the building 200; wherein, the plurality of The outlets of the first branch pipe groups 212 are respectively connected to the inlets of the first main pipe 211, the outlet of the first main pipe 211 is connected to the inlet of the compressor 30, the outlet of the expander 50 is connected to the inlet of the second main pipe 221, the outlets of the second main pipe 221 are respectively connected to the inlets of multiple second branch pipe groups 222, and the outlets of the second branch pipe groups 222 in the horizontal exhaust duct 210 of two adjacent buildings 200 are connected to the inlet of the first branch pipe group 212 through the first air duct 10, so that the outer wall and the inner wall of the building 200 can exchange heat.

[0046] like Figure 2As shown, specifically, in this embodiment, the first branch pipe group 212 includes a plurality of first branch pipes 2121, the second branch pipe group 222 includes a plurality of second branch pipes 2221, the first branch pipes 2121 and the second branch pipes 2221 are staggered, and adjacent first branch pipes 2121 and second branch pipes 2221 are connected through the first air duct 10, so that the outer wall and the inner wall of the building 200 can exchange heat.

[0047] It is worth noting that regarding the number of the first branch pipe group 212, the second branch pipe group 222, the first branch pipe 2121 and the second branch pipe 2221, technical personnel in this field should be able to make reasonable selections and designs based on the number of exhaust ducts 210 of the building 200, and no specific restrictions are made here.

[0048] Please refer to Figure 2 and Figure 5 In this embodiment, the refrigeration device 100 also includes a controller 60 and a first temperature sensor 61, a second temperature sensor 62 and a solenoid valve 63 electrically connected to the controller 60 respectively. The first temperature sensor 61 is configured on the outer wall of the building 200, and is used to obtain a first temperature value of the outer wall of the building 200. The second temperature sensor 62 is configured in the exhaust duct 210 of the building 200, and is used to obtain a second temperature value of the inner wall of the building 200. The solenoid valve 63 is set on the second air duct 20, and is used to control the on and off of the second air duct 20. The controller 60 calculates the actual temperature difference between the outer wall and the inner wall of the building 200 according to the first temperature value and the second temperature value, and compares the actual temperature difference with the preset temperature difference to control the start and stop of the solenoid valve 63.

[0049] It should be noted that, first, the first temperature sensor 61 is configured on the outer wall of the building 200 to obtain the first temperature value of the outer wall of the building 200, and the second temperature sensor 62 is configured in the exhaust duct 210 of the building 200 to obtain the second temperature value of the inner wall of the building 200, and the solenoid valve 63 is set on the second air duct 20 to control the on-off of the second air duct 20. Of course, in other embodiments, the solenoid valve 63 can also be set on the first air duct 10 to control the on-off of the first air duct 10. Regarding the value of the preset temperature difference, those skilled in the art should be able to make reasonable selections and designs according to actual needs, and no specific restrictions are made here. By way of example, the preset temperature difference is 10°C, 12°C or 15°C, etc.

[0050] Second, the refrigeration device 100 calculates the actual temperature difference between the outer wall and the inner wall of the building 200 according to the first temperature value and the second temperature value through the controller 60, and compares the actual temperature difference with the preset temperature difference to control the start and stop of the solenoid valve 63. Specifically, when the actual temperature difference is less than the preset temperature difference, it means that the heat of the outer wall of the building 200 is not very high. At this time, the controller 60 can control the solenoid valve 63 to close so that the refrigeration device 100 does not work, thereby reducing the use cost of the refrigeration device 100; when the actual temperature difference is greater than or equal to the preset temperature difference, it means that the heat of the outer wall of the building 200 is already high. At this time, the controller 60 can control the solenoid valve 63 to open, so that the refrigeration device 100 works and exchanges heat between the outer wall and the inner wall of the building 200.

[0051] like Figure 2 As shown, in this embodiment, the first temperature sensor 61, the second temperature sensor 62 and the solenoid valve 63 each include a plurality, the plurality of first temperature sensors 61 are evenly distributed along the outer wall of the building 200, the plurality of second temperature sensors 62 are evenly distributed along the inner wall of the building 200, and the plurality of solenoid valves 63 are arranged in a one-to-one correspondence with the plurality of second branch pipes 2221 of the second air duct 20.

[0052] It should be noted that when the number of solenoid valves 63 is large, the controller 60 can control the solenoid valves 63 separately. For example, if the temperature of the exterior wall in a certain direction of the building 200 is higher, only the solenoid valve 63 in that direction is opened, and the solenoid valves 63 in other directions are closed, thereby improving the intelligence level of the refrigeration device 100.

[0053] In this embodiment, the circulating medium is carbon dioxide to ensure the cleanliness and safety of the refrigeration device 100, while also achieving the purpose of environmental protection and energy saving. Figure 4 In this embodiment, a diverter plate 70 is provided in the second air duct 20 to enable the circulating medium to flow at a low speed in the second air duct 20, so that the circulating medium can fully absorb the surface heat of the outer wall of the building 200, while also reducing the noise and vibration of the second air duct 20. The circulating medium in the second air duct 20 can flow in a directional and regular manner under the pressure difference generated by the compressor 30.

[0054] The above description 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 modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A refrigeration device for cooling the exterior wall of a building, characterized in that: The invention comprises a first air duct, a second air duct and a circulating medium, wherein the first air duct is arranged on the outer wall of the building, the second air duct is arranged in the exhaust duct of the building, the first air duct and the second air duct are connected to form a circulating air duct, and the circulating medium circulates in the circulating air duct so that the outer wall and the inner wall of the building exchange heat with the circulating medium; It also includes a compressor, a cooler, an expander and a heat exchanger, wherein the compressor, the cooler and the expander are respectively arranged in the equipment room of the building, the heat exchanger is arranged in the first air duct, the first outlet of the second air duct is communicated with the inlet of the compressor, the outlet of the compressor is communicated with the inlet of the expander through the cooler, the outlet of the expander is communicated with the second inlet of the second air duct, the second outlet of the second air duct is communicated with the first inlet of the second air duct through the first air duct, the compressor is used to adiabatically compress the circulating working fluid, the cooler is used to cool the circulating working fluid, the expander is used to adiabatically expand the circulating working fluid, and the heat exchanger is used to absorb heat from the circulating working fluid at a constant pressure; The second air duct includes a first pipe assembly and a second pipe assembly, the first pipe assembly includes a first main pipe and a plurality of first branch pipe groups, the second pipe assembly includes a second main pipe and a plurality of second branch pipe groups, the first main pipe and the second main pipe are respectively arranged in the exhaust duct in the vertical direction of the building, and the first branch pipe group and the second branch pipe group are respectively arranged in the exhaust duct in the horizontal direction of the building; The outlets of the plurality of first branch pipe groups are respectively connected to the inlet of the first main pipe, the outlet of the first main pipe is connected to the inlet of the compressor, the outlet of the expander is connected to the inlet of the second main pipe, the outlet of the second main pipe is respectively connected to the inlet of the plurality of second branch pipe groups, and the outlets of the second branch pipe groups in the horizontal exhaust ducts of two adjacent buildings are connected to the inlet of the first branch pipe group through the first air duct; The circulating working fluid is carbon dioxide; A splitter plate is arranged in the second air duct.

2. The refrigeration device according to claim 1, characterized in that: The coolant of the cooler includes domestic water.

3. The refrigeration device according to claim 1, characterized in that: The first branch pipe group includes a plurality of first branch pipes, the second branch pipe group includes a plurality of second branch pipes, the first branch pipes and the second branch pipes are arranged in a staggered manner, and adjacent first branch pipes and second branch pipes are connected through the first air duct.

4. The refrigeration device according to claim 3, characterized in that: It also includes a controller and a first temperature sensor, a second temperature sensor and a solenoid valve electrically connected to the controller respectively. The first temperature sensor is arranged on the outer wall of the building to obtain a first temperature value of the outer wall of the building. The second temperature sensor is arranged in the exhaust duct of the building to obtain a second temperature value of the inner wall of the building. The solenoid valve is arranged on the second air duct to control the on and off of the second air duct. The controller calculates the actual temperature difference between the outer wall and the inner wall of the building according to the first temperature value and the second temperature value, and compares the actual temperature difference with the preset temperature difference to control the start and stop of the solenoid valve.

5. The refrigeration device according to claim 4, characterized in that: The first temperature sensor, the second temperature sensor and the solenoid valve each include a plurality of them, the plurality of the first temperature sensors are evenly distributed along the outer wall of the building, the plurality of the second temperature sensors are evenly distributed along the inner wall of the building, and the plurality of the solenoid valves are arranged in a one-to-one correspondence with the plurality of second branches of the second air duct.

6. A refrigeration system, characterized in that: It comprises a building and the refrigeration device according to any one of claims 1 to 5, wherein the first air duct of the refrigeration device is arranged on the outer wall of the building, and the second air duct of the refrigeration device is arranged in the exhaust duct of the building.

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