Vehicle-mounted refrigerator, vehicle and control method of vehicle-mounted refrigerator

Abstract

The embodiment of the invention relates to the technical field of vehicles, and discloses a vehicle-mounted refrigerator, a vehicle and a control method of the vehicle-mounted refrigerator, and the vehicle-mounted refrigerator comprises a box body, a water storage tank, an evaporator, a first driving device and a second driving device. The box body comprises a containing cavity and a heat exchange cavity which are arranged in a separated mode, the heat exchange cavity is used for containing a refrigerating medium, and the refrigerating medium can generate hydration reaction with water. The water storage tank is arranged outside the box body, communicates with the heat exchange cavity and is used for storing purified water. The evaporator is arranged outside the box body, communicates with the heat exchange cavity and is used for exchanging heat with a heat source. The first driving device is arranged in the water storage tank and used for driving purified water in the water storage tank to flow into the heat exchange cavity. The second driving device is connected with the box body and the evaporator and used for driving the medium in the heat exchange cavity to flow towards the evaporator or driving the medium in the evaporator to flow towards the heat exchange cavity. According to the technical scheme, the refrigerating effect of the vehicle-mounted refrigerator can be improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically to a vehicle-mounted refrigerator, a vehicle, and a control method for the vehicle-mounted refrigerator. Background Technology

[0002] As a small refrigeration device that can be carried in a vehicle, a car refrigerator can store a certain amount of food and beverages and keep them fresh, bringing great convenience to users.

[0003] However, car refrigerators typically only start operating after the vehicle is started, requiring a considerable amount of time to cool food or beverages, making them inconvenient to use. Existing technology provides a carbon dioxide hydrate refrigeration system. The working fluid in this system is a CO2 gas hydrate slurry. A suitable amount of liquid water is pre-stored in the hydrate reaction tank. The refrigeration system requires the addition of small amounts of additives, such as tetrahydrofuran (THF) and tetrabutylammonium bromide (TBAB), as well as small amounts of secondary crystallizers, such as sodium dodecyl sulfate (SDS) and tetrabutylammonium fluoride (TBAF). The second water pump is turned on in advance to circulate the cooling medium between the heat exchange pipes and the cooler. The gas pressure is controlled within a suitable range by a pressure control valve. Simultaneously, the first and third switch valves are opened, and the compressor is started, injecting CO2 gas into the hydrate reaction tank at a certain pressure. Near the heat exchange pipes, the CO2 gas mixes and agitates with water, initiating hydrate formation. When hydrate formation continues and reaches a certain quantity—that is, when its presence is clearly visible through the viewing window—the hydrate circulation pump is turned on to send it to the terminal heat exchange equipment for cooling. However, this device is a large refrigeration unit with a very complex structure, making it difficult to apply to vehicles, and the problem of poor cooling effect of vehicle refrigerators remains unsolved. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a vehicle refrigerator, a vehicle and a control method for the vehicle refrigerator, which aims to solve the problem of poor cooling effect of vehicle refrigerators in the prior art.

[0005] In a first aspect, embodiments of this application provide a vehicle-mounted refrigerator, including a cabinet, a water tank, an evaporator, a first driving device, and a second driving device. The cabinet includes a separately disposed receiving cavity and a heat exchange cavity. The heat exchange cavity is used to receive a refrigerant medium capable of undergoing a hydration reaction with water. The water tank is located outside the cabinet and communicates with the heat exchange cavity, and is used to store purified water. The evaporator is located outside the cabinet and communicates with the heat exchange cavity, and is used to exchange heat with a heat source. The first driving device is located inside the water tank and is used to drive the purified water in the water tank to flow into the heat exchange cavity. The second driving device is connected to the cabinet and the evaporator, and is used to drive the medium in the heat exchange cavity to flow into the evaporator, or drive the medium in the evaporator to flow into the heat exchange cavity.

[0006] According to the above technical means, the medium in the heat exchange chamber can flow back and forth in the heat exchange chamber and evaporator, thereby using pure water and refrigerant to realize the cooling function of the vehicle refrigerator. When pure water and refrigerant undergo a hydration reaction, they can quickly absorb heat, thus enabling the vehicle refrigerator to cool down quickly.

[0007] Meanwhile, compared to setting up multiple pipes to circulate the heat exchange medium in the heat exchange chamber and evaporator, by setting up the first and second drive devices, only one pipe or channel needs to be set up so that the refrigerant can flow back and forth between the heat exchange chamber and evaporator. This simplifies the structure of the vehicle refrigerator, helps to improve the integration of the vehicle refrigerator, facilitates the installation of the vehicle refrigerator in the vehicle space, and also facilitates the spatial layout of the vehicle, improving the utilization rate of the vehicle's interior space.

[0008] In addition, during the hydration reaction between pure water and refrigerant in the heat exchange chamber, heat is also absorbed from some of the pure water that did not participate in the reaction. This allows the heat exchange chamber to store low-temperature pure water, which continuously absorbs heat from the chamber, thus achieving heat preservation and improving the insulation effect of the vehicle refrigerator.

[0009] In one possible embodiment, the second driving device includes a storage tank and a first pump body. The storage tank is used to store a protective liquid. The storage tank is in communication with the heat exchange chamber and the evaporator. The first pump body is disposed inside the storage tank and is used to drive the protective liquid to flow into the heat exchange chamber or the evaporator.

[0010] According to the above-mentioned technical means, a first pump body can drive the protective liquid to flow into the heat exchange chamber or evaporator, thereby compressing the medium in the heat exchange chamber or evaporator and realizing the function of automatically reciprocating the driving medium in the heat exchange chamber and evaporator. Compared with setting a separate pump body to drive the reciprocating flow of the medium in the heat exchange chamber and evaporator, and setting a separate pump body to drive the protective liquid to flow into the heat exchange chamber or evaporator, the overall structure of the vehicle refrigerator can be simplified, thereby further improving the integration of the vehicle refrigerator.

[0011] In one possible embodiment, the vehicle-mounted refrigerator further includes a first pipe, a second pipe, a third pipe, and a fourth pipe. The inlet of the first pipe is connected to a water storage tank, and the outlet of the first pipe is connected to a first position of the heat exchange chamber. The first end of the second pipe is connected to a liquid storage tank, and the second end of the second pipe is connected to a second position of the heat exchange chamber. The first end of the third pipe is connected to an evaporator, and the second end of the third pipe is connected to a third position of the heat exchange chamber. The first end of the fourth pipe is connected to the water storage tank, and the second end of the fourth pipe is connected to the evaporator. Vertically, the first position is located below the second position. The third position is located below the first position.

[0012] Based on the aforementioned technical means, positioning the second position above the first and third positions facilitates the flow of the protective liquid above the refrigerant in the heat exchange chamber into the storage tank during vehicle-mounted refrigerator cooling, thereby preventing excessive pressure within the heat exchange chamber. After the vehicle-mounted refrigerator has finished cooling, when the protective liquid is introduced into the heat exchange chamber via the first pump, the third position, located below the first and second positions, allows the upper protective liquid to compress the hydrates and other media below, driving them to flow out of the heat exchange chamber from the bottom. This design makes the vehicle-mounted refrigerator layout more rational and facilitates its cooling function.

[0013] In one possible embodiment, the vehicle-mounted refrigerator further includes a first switching valve, a second switching valve, and a third switching valve. The first switching valve is connected to a first pipe and is used to control the opening or closing of the first pipe. The second switching valve is connected to a third pipe and is used to control the opening or closing of the third pipe.

[0014] Based on the above technical means, the flow direction of the medium can be guided by opening or closing multiple switching valves, ensuring the normal flow of the medium and the normal function of the vehicle refrigerator.

[0015] In one possible embodiment, the vehicle-mounted refrigerator further includes a condensing pipe and a third switching valve. The inlet of the condensing pipe is connected to the evaporator, and the outlet of the condensing pipe is connected to a water tank. The third switching valve is connected to the condensing pipe and is used to control the opening or closing of the condensing pipe.

[0016] Based on the aforementioned technical means, during the heat exchange process between the hydrate and the heat source in the evaporator, the third switch valve can be opened. This allows the water vapor evaporated from the hydrate to flow back to the water storage tank through the condensation pipe, thus achieving the recycling of purified water. This requires additional replenishment of purified water into the water storage tank, facilitating the use of the vehicle refrigerator. Furthermore, during the cooling process of the vehicle refrigerator, when the first pump body introduces protective fluid into the evaporator, or when the vehicle refrigerator has finished cooling and the first pump body introduces protective fluid into the heat exchange chamber, the third switch valve needs to be closed to prevent the medium in the evaporator from flowing into the water storage tank through the fourth pipe and affecting the use of the water storage tank.

[0017] In one possible embodiment, the first driving device includes a second pump body disposed inside a water storage tank, used to drive pure water in the storage tank to flow into the receiving cavity.

[0018] Based on the aforementioned technical means, pure water can be directly pumped into the heat exchange chamber via the pump body, allowing the pure water to undergo a hydration reaction with the refrigerant, thereby cooling the chamber. Compared to placing the second pump body outside the liquid storage tank, placing it inside the water storage tank reduces the space required for the vehicle refrigerator, thus improving its integration and further facilitating its space configuration.

[0019] In one possible embodiment, the evaporator includes a mounting plate and a heat exchange plate, with an evaporation chamber formed between the mounting plate and the heat exchange plate, and a first opening and a second opening communicating with the evaporation chamber. The first opening communicates with the heat exchange chamber, and the second opening communicates with a liquid storage tank.

[0020] Based on the above-mentioned technical means, the evaporator can be made into a plate shape, thereby increasing the heat exchange area between the evaporation chamber and the heat source, thus improving the conversion rate of hydrates in the evaporation chamber and facilitating the use of vehicle refrigerators.

[0021] In one possible embodiment, the mounting plate is used to attach to the top of the vehicle. The heat exchange plate is a glass plate.

[0022] Using the aforementioned technology, sunlight can pass through a glass plate and reach the hydrates, thus heating them as a heat source and converting them into a cooling medium for reuse in the vehicle refrigerator. Compared to installing an additional heating device, this simplifies the structure of the vehicle refrigerator, makes better use of space, and reduces processing and operating costs, making vehicles more energy-efficient and environmentally friendly.

[0023] In one possible embodiment, the evaporator includes a mounting plate, a heat exchange plate, a first inlet / outlet liquid pipe, and a second inlet / outlet liquid pipe; an evaporation chamber is formed between the mounting plate and the heat exchange plate; a first end of the first inlet / outlet liquid pipe is connected to the evaporation chamber, and a second end of the first inlet / outlet liquid pipe is connected to a first end of a third pipe; a first end of the second inlet / outlet liquid pipe is connected to the evaporation chamber, and a second end of the second inlet / outlet liquid pipe is connected to a second end of a fourth pipe.

[0024] According to the above technical means, the evaporation chamber and the third pipe can be connected through the first inlet and outlet pipes, and the evaporation chamber and the fourth pipe can be connected through the second inlet and outlet pipes, thereby facilitating the flow of the protective liquid or the medium in the heat exchange chamber into the evaporation chamber driven by the first pump body. Furthermore, compared to directly connecting the second pipe to the storage tank, or directly connecting the fourth pipe to the storage tank, by setting the first inlet and outlet pipes and the third pipe, and the second inlet and outlet pipes and the fourth pipe, it is easier to disassemble and connect them, thus facilitating the installation and disassembly of the evaporator.

[0025] In one possible embodiment, the water storage tank includes a first body, an inlet pipe, and an outlet pipe; the first body is provided with a first cavity, and a second pump body is disposed in the first cavity; the inlet of the inlet pipe is used to connect to an external water source, and the outlet of the inlet pipe is connected to the first cavity; the inlet of the outlet pipe is connected to the second pump body, and the outlet of the outlet pipe is connected to the inlet of the first pipe.

[0026] Based on the aforementioned technical means, purified water can be added to the first chamber through the inlet pipe to ensure sufficient purified water to undergo a hydration reaction with the cooling medium, thus guaranteeing the cooling effect of the vehicle refrigerator. Furthermore, by setting up the outlet pipe, the second pump body can be easily installed within the first chamber, thereby improving the integration of the vehicle refrigerator. Compared to directly connecting the first pipe to the water tank, the outlet pipe and the first pipe can be more easily disassembled and connected, facilitating the installation and removal of the water tank.

[0027] In one possible embodiment, the liquid storage tank includes a second body, a third inlet / outlet pipe, and a fourth inlet / outlet pipe; the second body is provided with a second cavity, a first pump body is disposed in the second cavity, the first end of the third inlet / outlet pipe and the first end of the fourth inlet / outlet pipe are selectively connected to the first pump body, the second end of the third inlet / outlet pipe is connected to the first end of the second pipe, and the second end of the fourth inlet / outlet pipe is connected to the first end of the fourth pipe.

[0028] According to the above technical means, the first pump body and the second pipe can be connected through the third inlet / outlet pipe, or the first pump body and the fourth pipe can be connected through the fourth inlet / outlet pipe, thereby facilitating the first pump body to drive the protective liquid to flow to the heat exchange chamber or evaporator. At the same time, by setting the third inlet / outlet pipe and the fourth inlet / outlet pipe, the first pump body can be conveniently set in the second cavity, thereby improving the integration of the vehicle refrigerator. Compared with directly connecting the second pipe to the liquid storage tank, or directly connecting the fourth pipe to the liquid storage tank, the third inlet / outlet pipe and the second pipe, and the fourth inlet / outlet pipe and the fourth pipe can be more easily disassembled and connected, thereby facilitating the installation and removal of the liquid storage tank.

[0029] In one possible embodiment, the second driving device includes a liquid storage tank and a first pump body. The liquid storage tank stores a protective liquid that covers the refrigerant medium. The liquid storage tank communicates with the heat exchange chamber and the evaporator. The first pump body is located inside the liquid storage tank and drives the protective liquid to flow into the heat exchange chamber or the evaporator. The vehicle refrigerator also includes a controller connected to the refrigerator body and electrically connected to the first and second driving devices. The controller is configured to: control the first driving device to start, introducing purified water into the heat exchange chamber; control the first driving device to stop; and control the second driving device to start, introducing the protective liquid into the heat exchange chamber.

[0030] Based on the aforementioned technical means, the controller can activate the first drive device to allow purified water to flow into the heat exchange chamber, achieving the initial cooling of the vehicle-mounted refrigerator. Once the amount of purified water supplied meets the refrigerator's cooling requirements, the first drive device can be shut off to stop the flow of purified water into the heat exchange chamber. After cooling is complete, the second drive device can be activated to introduce a protective fluid into the heat exchange chamber, thereby transferring the medium from the heat exchange chamber to the evaporator, restoring the refrigerant and facilitating the reuse of the vehicle-mounted refrigerator. By setting up a controller, the refrigerator's cooling and refrigerant restoration can be automatically achieved, further facilitating the use of the vehicle-mounted refrigerator.

[0031] Secondly, embodiments of this application provide a vehicle including the aforementioned vehicle-mounted refrigerator.

[0032] Thirdly, embodiments of this application provide a control method for a vehicle-mounted refrigerator, comprising: controlling a first driving device to start and introducing purified water into the heat exchange chamber; controlling the first driving device to stop; and controlling a second driving device to start and introducing a protective fluid into the heat exchange chamber.

[0033] In one possible embodiment, the control method further includes: controlling the first driving device to start and introduce pure water into the heat exchange chamber, and controlling the second driving device to start and introduce a protective liquid into the evaporator. The first and second driving devices are then controlled to shut down. The second driving device is then controlled to start and introduce the protective liquid into the heat exchange chamber. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application will be described below.

[0035] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a vehicle-mounted refrigerator provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a box provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a water storage tank provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a liquid storage tank provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of an evaporator provided in an embodiment of this application; Figure 7 A flowchart illustrating a control method for a vehicle-mounted refrigerator provided in an embodiment of this application; Figure 8This is a flowchart illustrating another control method for a vehicle-mounted refrigerator provided in an embodiment of this application.

[0036] Explanation of reference numerals in the attached figures: 100 - Vehicle; 10 - Car refrigerator; 1-Water storage tank; 11-First main body; 111-First cavity; 12-Inlet pipe; 13-Outlet pipe; 2-Reservoir tank; 21-Second main body; 211-Second cavity; 22-Third inlet / outlet pipe; 23-Fourth inlet / outlet pipe; 3-Evaporator; 31-Evaporation chamber; 32-Mounting plate; 33-Heat exchange plate; 34-First inlet / outlet liquid pipe; 35-Second inlet / outlet liquid pipe; 36-First seal; 37-Second seal; 4-Box body; 41-Receiving cavity; 42-Heat exchange cavity; 43-Insulation layer; 44-Lid; 5-Controller; 6-Second pump body; 7-First pump body; 81. First pipe; 82. Second pipe; 83. Third pipe; 84. Fourth pipe; 85. Condensation pipe; 20 - Body. Detailed Implementation

[0037] The terms "first," "second," etc., are used for descriptive purposes only and have no sequential or technical meaning, nor should they be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Directional terms used in this application, such as "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," are merely for reference to the orientation shown in the accompanying drawings. The use of directional terms is for better and clearer explanation and understanding of this application, and does not indicate the orientation of the referred device or component in an actual application scenario.

[0038] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the two parts can rotate relative to each other after connection. "Sliding connection" refers to a connection where the two parts can slide relative to each other after connection.

[0039] The embodiments of this application are described below with reference to the accompanying drawings.

[0040] like Figure 1 As shown, Figure 1This is a schematic diagram of the structure of a vehicle 100 provided in an embodiment of this application. The vehicle 100 can be, but is not limited to, a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or a new energy vehicle.

[0041] like Figure 1 , Figure 2 As shown in the embodiment of this application, the vehicle 100 includes a body 20 and a vehicle refrigerator 10. The vehicle refrigerator 10 is installed in the passenger compartment on the body 20. The box 4 includes a receiving cavity 41. When the user is sitting in the passenger compartment, he / she can take out the items in the receiving cavity 41 or place the items in the receiving cavity 41 to store the items through the vehicle refrigerator 10.

[0042] The housing 4 also includes a heat exchange chamber 42, which is separated from the receiving cavity 41. The heat exchange chamber 42 is used to contain a refrigerant, which can undergo a hydration reaction with water. For example, the refrigerant can be urea, anhydrous copper sulfate, anhydrous calcium sulfate, etc.

[0043] The housing 4 also includes a water storage tank 1, an evaporator 3, a first drive unit, and a second drive unit. The water storage tank 1 is located outside the housing 4 and communicates with the heat exchange chamber 42, and is used to store purified water. The evaporator 3 is located outside the housing 4 and communicates with the heat exchange chamber 42, and is used to exchange heat with a heat source. For example, the heat source can be air, sunlight, the motor or engine of the vehicle 100, or a heating device, etc.

[0044] The first driving device is located inside the water storage tank 1 and is used to drive the pure water in the water storage tank 1 to flow into the heat exchange chamber 42. The second driving device is connected to the housing 4 and the evaporator 3 and is used to drive the medium in the heat exchange chamber 42 to flow into the evaporator 3, or drive the medium in the evaporator 3 to flow into the heat exchange chamber 42.

[0045] Thus, when the vehicle refrigerator 10 first starts cooling, the first drive device can be activated to introduce purified water into the heat exchange chamber 42. This allows the purified water to undergo a hydration reaction with the refrigerant in the heat exchange chamber 42, absorbing heat from the receiving chamber 41 and thus cooling the receiving chamber 41. After the vehicle refrigerator 10 has finished cooling, the second drive device can be started. The second drive device will introduce the hydrate produced by the hydration reaction between the refrigerant and water in the heat exchange chamber 42 into the evaporator 3. The hydrate absorbs heat from the heat source in the evaporator 3 and can be converted back into the refrigerant.

[0046] When the vehicle refrigerator 10 needs to cool, the first and second drive devices can be activated simultaneously. The first drive device introduces purified water into the heat exchange chamber 42, while the second drive device introduces the refrigerant from the evaporator 3 into the heat exchange chamber 42. This causes the purified water and the heat exchange medium to undergo a hydration reaction again within the heat exchange chamber 42, absorbing heat from the receiving chamber 41 and thus cooling the receiving chamber 41. After cooling is complete, the second drive device can again introduce the hydrated water from the heat exchange chamber 42 into the evaporator 3, converting the hydrated water back into the refrigerant for further cooling by the vehicle refrigerator 10.

[0047] With the above configuration, the medium in the heat exchange chamber 42 can flow back and forth in the heat exchange chamber 42 and the evaporator 3, thereby realizing the cooling function of the vehicle refrigerator 10 by using pure water and refrigerant. When the pure water and refrigerant undergo a hydration reaction, they can quickly absorb heat, thus enabling the vehicle refrigerator 10 to cool down quickly.

[0048] Meanwhile, compared to setting up multiple pipes to circulate the heat exchange medium in the heat exchange chamber 42 and the evaporator 3, by setting up the first driving device and the second driving device, only one pipe or channel needs to be set up so that the refrigerant can flow back and forth between the heat exchange chamber 42 and the evaporator 3. This simplifies the structure of the vehicle refrigerator 10, helps to improve the integration of the vehicle refrigerator 10, facilitates the installation of the vehicle refrigerator 10 in the space of the vehicle 100, and also facilitates the spatial layout of the vehicle 100, thereby improving the utilization rate of the interior space of the vehicle 100.

[0049] In addition, during the hydration reaction between pure water and refrigerant in heat exchange chamber 42, heat from some of the unreacted pure water is also absorbed. This allows the heat exchange chamber 42 to store low-temperature pure water, which continuously absorbs heat from the containment chamber 41, thus achieving heat preservation of the containment chamber 41 and improving the heat preservation effect of the vehicle refrigerator 10.

[0050] For example, the shape of the housing 4 is square, circular, etc. Taking the shape of the housing 4 as square as an example, the heat exchange cavity 42 can be located on one side wall of the square housing 4, or it can be located on multiple side walls. Specifically, the heat exchange cavity 42 can enclose the receiving cavity 41.

[0051] In some embodiments, such as Figure 2 , Figure 3As shown, the cabinet 4 also includes an opening communicating with the receiving cavity 41, and the vehicle refrigerator 10 also includes a cover 44, which is movably connected to the opening and can seal the opening. In this way, the receiving cavity 41 can be opened or closed through the cover 44, which facilitates the retrieval or storage of items and improves the heat preservation effect of the vehicle refrigerator 10.

[0052] In some embodiments, such as Figure 2 , Figure 3 As shown, the housing 4 is also provided with an insulation layer 43, which is located on the side of the heat exchange chamber 42 away from the receiving chamber 41. The insulation layer 43 contains insulation material (such as foam, heat insulation cotton, etc.). In this way, the receiving chamber 41 can be insulated through the insulation layer 43, thereby improving the cooling effect of the vehicle refrigerator 10.

[0053] In some embodiments, such as Figure 2 , Figure 4 As shown, the first driving device includes a second pump body 6, which is located inside the water storage tank 1 and is used to drive the pure water in the water storage tank 1 to flow into the receiving cavity 41. Of course, the second pump body 6 can also be located outside the water storage tank 1.

[0054] For example, the second pump body 6 can be a hydraulic pump, centrifugal pump, etc.

[0055] This allows pure water to be directly pumped into the heat exchange chamber 42 via the pump body, so that the pure water and the refrigerant can undergo a hydration reaction to cool the receiving chamber 41. Compared to placing the second pump body 6 outside the liquid storage tank 2, placing the second pump body 6 inside the water storage tank 1 reduces the space required for the vehicle refrigerator 10, thereby improving the integration of the vehicle refrigerator 10 and further facilitating its space configuration.

[0056] In some other embodiments, the first driving device may also include a piston or the like, which pushes pure water into the heat exchange chamber 42.

[0057] In some embodiments, the second driving device can be a separate pump body, which is disposed inside the evaporator 3. The pump body directly drives the medium in the heat exchange chamber 42 to flow into the evaporator 3, or drives the medium in the evaporator 3 to flow into the heat exchange chamber 42.

[0058] In other embodiments, such as Figure 2 , Figure 5 As shown, the second drive unit includes a liquid storage tank 2 and a first pump body 7. The liquid storage tank 2 is used to store a protective liquid, which is used to cover the refrigerant medium.

[0059] It should be noted that the protective liquid covers the refrigerant in the heat exchange chamber 42, which can isolate the refrigerant from the air, prevent the refrigerant from getting damp when it comes into contact with water vapor, and ensure the normal use of the refrigerant.

[0060] For example, the protective fluid can be triglycerides, mineral oil, silicone oil, etc.

[0061] The liquid storage tank 2 is connected to the heat exchange chamber 42 and the evaporator 3. The first pump body 7 is located in the liquid storage tank 2 and is used to drive the protective liquid to flow into the heat exchange chamber 42 or the evaporator 3.

[0062] With the above settings, during the cooling process of the vehicle refrigerator 10, when the first driving device drives pure water into the heat exchange chamber 42, or when the first driving device drives pure water into the heat exchange chamber 42 and the first pump body 7 drives the heat exchange medium into the heat exchange chamber 42, as the amount of medium entering the heat exchange chamber 42 increases, the protective liquid above the heat exchange medium in the heat exchange chamber 42 can be squeezed into the liquid storage tank 2, thereby avoiding excessive cut-off in the heat exchange chamber 42, which would lead to excessive pressure in the heat exchange chamber 42, and thus ensuring the safe use of the vehicle refrigerator 10.

[0063] After the vehicle refrigerator 10 has finished cooling, the first pump body 7 can be started to re-introduce the protective liquid into the heat exchange chamber 42 and squeeze the medium in the heat exchange chamber 42, thereby introducing hydrates and the like into the evaporator 3. When the hydrates are converted into a refrigerant in the evaporator 3 and the refrigerator needs to cool again, the first pump body 7 can be started and the protective liquid can be introduced into the evaporator 3, thereby squeezing the heat exchange medium in the evaporator 3 into the heat exchange chamber 42.

[0064] In this way, the protective liquid can be driven by the first pump body 7 to flow into the heat exchange chamber 42 or the evaporator 3, thereby compressing the medium in the heat exchange chamber 42 or the evaporator 3 and realizing the function of automatically reciprocating the driving medium in the heat exchange chamber 42 and the evaporator 3. Compared with setting a separate pump body to drive the medium to reciprocate in the heat exchange chamber 42 and the evaporator 3, and setting a separate pump body to drive the protective liquid to flow into the heat exchange chamber 42 or the evaporator 3, the overall structure of the vehicle refrigerator 10 can be simplified, thereby further improving the integration of the vehicle refrigerator 10.

[0065] For example, the first pump body 7 can be a hydraulic pump, centrifugal pump, etc.

[0066] In some embodiments, such as Figure 2 , Figure 3As shown, the vehicle-mounted refrigerator 10 also includes a first pipe 81, a second pipe 82, a third pipe 83, and a fourth pipe 84. The inlet of the first pipe 81 is connected to the water storage tank 1, and the outlet of the first pipe 81 is connected to the first position of the heat exchange chamber 42. The first end of the second pipe 82 is connected to the liquid storage tank 2, and the second end of the second pipe 82 is connected to the second position of the heat exchange chamber 42. The first end of the third pipe 83 is connected to the evaporator 3, and the second end of the third pipe 83 is connected to the third position of the heat exchange chamber 42. One end of the fourth pipe 84 is connected to the water storage tank 1, and the other end of the fourth pipe 84 is connected to the evaporator 3.

[0067] Vertically, the first position is below the second position. The third position is below the first position.

[0068] With the above configuration, pure water can flow from the water storage tank 1 to the heat exchange chamber 42 through the first pipe 81, and the protective liquid can flow into the heat exchange chamber 42 and the evaporator 3 through the second pipe 82 and the fourth pipe 84 respectively. The medium in the heat exchange chamber 42 can flow into the evaporator 3 through the third pipe 83, thereby ensuring the cooling function of the vehicle refrigerator 10.

[0069] Furthermore, by placing the second position above the first and third positions, during the cooling process of the vehicle refrigerator 10, the protective liquid above the refrigerant in the heat exchange chamber 42 can easily flow into the storage tank 2, thereby preventing excessive pressure within the heat exchange chamber 42. After the vehicle refrigerator 10 has finished cooling, when the protective liquid is introduced into the heat exchange chamber 42 via the first pump 7, the third position, located below the first and second positions, allows the upper protective liquid to compress the lower hydrates and other media, thereby driving the hydrates and other media to flow out of the heat exchange chamber 42 from below. This design makes the layout of the vehicle refrigerator 10 more rational and facilitates its cooling function.

[0070] In some embodiments, such as Figure 2 , Figure 4 As shown, the water storage tank 1 includes a first main body 11, an inlet pipe 12, and an outlet pipe 13. The first main body 11 has a first cavity 111, and a second pump body 6 is disposed within the first cavity 111. The inlet of the inlet pipe 12 is used to connect to an external water source, and the outlet of the inlet pipe 12 is connected to the first cavity 111. The inlet of the outlet pipe 13 is connected to the second pump body 6, and the outlet of the outlet pipe 13 is connected to the inlet of the first pipeline 81.

[0071] In this way, pure water can be added to the first cavity 111 through the liquid inlet pipe 12 to ensure that there is enough pure water to react with the cooling medium and ensure the cooling effect of the vehicle refrigerator 10.

[0072] Furthermore, by setting the liquid outlet pipe 13, the second pump body 66 can be conveniently set inside the first cavity 111, thereby improving the integration of the vehicle refrigerator 10. Compared with directly connecting the first pipe 81 to the water storage tank 1, the liquid outlet pipe 13 and the first pipe 81 can be more easily disassembled and connected, thus facilitating the installation and disassembly of the water storage tank 1.

[0073] In some embodiments, such as Figure 2 , Figure 3 As shown, the inlet of the liquid inlet pipe 12 is connected to the outlet of the condenser pipe 85. In this way, the water vapor flowing out of the evaporator 3 can be condensed into pure water through the condenser pipe 85 and flow into the first chamber 111, realizing the recycling of pure water.

[0074] In some embodiments, such as Figure 2 , Figure 5 As shown, the liquid storage tank 2 includes a second main body 21, a third inlet / outlet pipe 22, and a fourth inlet / outlet pipe 23. The second main body 21 has a second cavity 211, and the first pump body 7 is disposed in the second cavity 211. The first ends of the third inlet / outlet pipe 22 and the first ends of the fourth inlet / outlet pipe 23 are selectively connected to the first pump body 7. The second end of the third inlet / outlet pipe 22 is connected to the first end of the second pipe 82, and the second end of the fourth inlet / outlet pipe 23 is connected to the first end of the fourth pipe 84.

[0075] In this way, the first pump body 7 and the second pipe 82 can be connected through the third inlet / outlet pipe 22, or the first pump body 7 and the fourth pipe 84 can be connected through the fourth inlet / outlet pipe 23, so that the first pump body 7 can drive the protective liquid to flow to the heat exchange chamber 42 or the evaporator 3.

[0076] Meanwhile, by setting the third inlet / outlet pipe 22 and the fourth inlet / outlet pipe 23, the first pump body 7 can be conveniently set inside the second cavity 211, thereby improving the integration of the vehicle refrigerator 10. Compared with directly connecting the second pipe 82 to the liquid storage tank 2, or directly connecting the fourth pipe 84 to the liquid storage tank 2, the third inlet / outlet pipe 22 and the second pipe 82, the fourth inlet / outlet pipe 23 and the fourth pipe 84 can be more easily disassembled and connected, thereby facilitating the installation and disassembly of the liquid storage tank 2.

[0077] For example, the first pump body 7, the third inlet / outlet pipe 22, and the fourth inlet / outlet pipe 23 can be connected together using a three-way valve to achieve selective communication between one end of the third inlet / outlet pipe 22 and one end of the fourth inlet / outlet pipe 23 and the first pump body 7. Alternatively, on / off valves can be installed on the third inlet / outlet pipe 22 and the fourth inlet / outlet pipe 23 respectively, and selective communication between one end of the third inlet / outlet pipe 22 and one end of the fourth inlet / outlet pipe 23 and the first pump body 7 can be achieved by controlling the opening and closing of the third inlet / outlet pipe 22 and the fourth inlet / outlet pipe 23.

[0078] It should be noted that when one end of the third inlet / outlet pipe 22 and one end of the fourth inlet / outlet pipe 23 are connected to the first pump body 7, the other end of the third inlet / outlet pipe 22 and one end of the fourth inlet / outlet pipe 23 are connected to the second chamber, so that the protective oil can flow back into the second chamber.

[0079] In some embodiments, the vehicle refrigerator 10 further includes a first switching valve and a second switching valve. The first switching valve is connected to a first pipe 81 and is used to control the opening or closing of the first pipe 81. The second switching valve is connected to a third pipe 83 and is used to control the opening or closing of the third pipe 83.

[0080] In this way, the flow direction of the medium can be guided by opening or closing multiple switching valves, ensuring the normal flow of the medium and the normal function of the vehicle refrigerator 10.

[0081] Specifically, when the vehicle refrigerator 10 first cools down and the first drive device drives pure water into the heat exchange chamber 42, the first switch valve can be opened and the third switch valve can be closed. In this way, after the pure water enters the heat exchange chamber 42, it can push the protective liquid through the second pipe 82 into the liquid storage tank 2, and prevent the pure water from flowing into the third pipe 83 and then into the evaporator 3, thus ensuring the cooling effect of the pure water and the refrigerant on the receiving chamber 41.

[0082] After the refrigerator has finished cooling, during the process of the medium in the heat exchange chamber 42 flowing into the evaporator 3 driven by the first pump body 7, the first switch valve can be closed and the third switch valve can be opened, so that the protective liquid can flow to the heat exchange chamber 42 through the second pipe 82 and the medium in the heat exchange chamber 42 can flow to the evaporator 3 through the third pipe 83.

[0083] During the refrigerator's recooling process, the first and third switching valves can be opened simultaneously. This allows pure water to flow from the water tank 1 into the heat exchange chamber 42, the refrigerant to flow from the evaporator 3 into the heat exchange chamber 42, and the protective liquid in the heat exchange chamber 42 to flow into the liquid storage tank 2.

[0084] In some embodiments, such as Figure 2 As shown, the vehicle-mounted refrigerator 10 also includes a condensing pipe 85 and a third switching valve. The inlet of the condensing pipe 85 is connected to the evaporator 3, and the outlet of the condensing pipe 85 is connected to the water storage tank 1. The third switching valve is connected to the condensing pipe 85 and is used to control the opening or closing of the condensing pipe 85.

[0085] With the above settings, during the heat exchange process between the hydrate and the heat source in the evaporator 3, the third switch valve can be opened, so that the water vapor evaporated from the hydrate can flow back to the water storage tank 1 through the condensation pipe 85, thereby realizing the recycling of pure water. Thus, it is necessary to add pure water to the water storage tank 1, which facilitates the use of the vehicle refrigerator 10.

[0086] In addition, during the cooling process of the vehicle refrigerator 10, when the first pump body 7 introduces protective liquid into the evaporator 3, or when the vehicle refrigerator 10 has finished cooling and the first pump body 7 introduces protective liquid into the heat exchange chamber 42, the third switch valve needs to be closed to prevent the medium in the evaporator 3 from flowing into the water storage tank 1 through the fourth pipe 84 and affecting the use of the water storage tank 1.

[0087] In some other embodiments, the water vapor evaporated from the hydrate can be directly discharged into the air, and as the vehicle refrigerator 10 is used, purified water can be added to the water storage tank 1 when needed.

[0088] It should be noted that purified water can be added to the water storage tank 1 through the liquid inlet pipe 12 on the water storage tank 1 into the first cavity 11.

[0089] In some embodiments, such as Figure 2 , Figure 6 As shown, the evaporator 3 includes a mounting plate 32 and a heat exchange plate 33. An evaporation chamber 31 is formed between the mounting plate 32 and the heat exchange plate 33, and a first opening and a second opening are connected to the evaporation chamber 31. The first opening is connected to the heat exchange chamber 42, and the second opening is connected to the liquid storage tank 2.

[0090] This allows the evaporator 3 to be plate-shaped, thereby increasing the heat exchange area between the evaporation chamber 31 and the heat source, thus improving the conversion rate of hydrates in the evaporation chamber 31 and facilitating the use of the vehicle refrigerator 10.

[0091] In some embodiments, such as Figure 2 , Figure 6 As shown, the evaporator 3 also includes a first inlet / outlet pipe 34 and a second inlet / outlet pipe 35. One end of the first inlet / outlet pipe 34 is connected to the evaporation chamber 31, and the other end of the first inlet / outlet pipe 34 is connected to the first end of the third pipe 83. One end of the second inlet / outlet pipe 35 is connected to the evaporation chamber 31, and the other end of the second inlet / outlet pipe 35 is connected to the second end of the fourth pipe 84.

[0092] In this way, the evaporation chamber 31 and the third pipe 83 can be connected through the first inlet / outlet pipe 34, and the evaporation chamber 31 and the fourth pipe 84 can be connected through the second inlet / outlet pipe 35, so that the first pump body 7 can drive the protective liquid or the medium in the heat exchange chamber 42 to flow into the evaporation chamber 31.

[0093] Compared to directly connecting the second pipe 82 to the liquid storage tank 2, or directly connecting the fourth pipe 84 to the liquid storage tank 2, by setting the first inlet / outlet pipe 34 and the second inlet / outlet pipe 35, the first inlet / outlet pipe 34 and the third pipe 83, the second inlet / outlet pipe 35 and the fourth pipe 84 can be more easily disassembled and connected, thus facilitating the installation and disassembly of the evaporator 3.

[0094] like Figure 6 As shown, the evaporator 3 also includes a first seal 36 and a second seal 37. The first seal 36 is wrapped around the outer wall of the first inlet / outlet pipe 34, and the second seal 37 is included in the outer wall of the second inlet / outlet pipe 35. By providing the first seal 36 and the second seal 37, leakage of the medium in the evaporation chamber 31 can be prevented, thus ensuring the normal function of the vehicle refrigerator 10.

[0095] In some embodiments, the mounting plate 32 is used to connect to the top of the vehicle 100. The heat exchange plate 33 is a glass plate.

[0096] In this way, sunlight can pass through the glass plate and shine on the hydrate, thereby using sunlight as a heat source to heat the hydrate and convert it into a cooling medium so that the vehicle refrigerator 10 can be reused.

[0097] Compared to setting up an additional heating device, it simplifies the structure of the vehicle refrigerator 10, makes the space of the vehicle refrigerator 10 more convenient for children, and reduces the processing and use costs of the vehicle refrigerator 10, thereby making the vehicle 100 more energy-efficient and environmentally friendly.

[0098] In some embodiments, such as Figure 2 , Figure 3 As shown, the vehicle-mounted refrigerator 10 also includes a controller 5, which is connected to the cabinet 4 and electrically connected to the first drive unit and the second drive unit. The controller 5 is configured as follows: The first drive device is started, and pure water is introduced into the heat exchange chamber 42.

[0099] The first drive unit is shut down.

[0100] The second drive unit is started, and protective liquid is introduced into the heat exchange chamber 42.

[0101] In this way, the controller 5 can control the first drive device to start, so that pure water can be introduced into the heat exchange chamber 42 to achieve the first cooling of the vehicle refrigerator 10. And, after the amount of pure water introduced meets the cooling needs of the vehicle refrigerator 10, the first drive device can be turned off to stop the introduction of pure water into the heat exchange chamber 42.

[0102] Furthermore, after cooling is complete, the second drive device can be activated to introduce protective fluid into the heat exchange chamber 42, thereby allowing the medium in the heat exchange chamber 42 to be introduced into the evaporator 3, realizing the restoration of the refrigerant medium for reuse of the vehicle refrigerator 10. By setting the controller 5, the cooling of the refrigerator and the restoration of the refrigerant medium can be automatically realized, further facilitating the use of the vehicle refrigerator 10.

[0103] This application also provides a control method for a vehicle-mounted refrigerator 10, such as... Figure 7As shown, the control methods include: Step S01: Control the first drive device to start and introduce pure water into the heat exchange chamber 42.

[0104] Step S02: Control the first drive device to shut down.

[0105] Step S03: Control the second drive device to start and introduce protective liquid into the heat exchange chamber 42.

[0106] In this way, the vehicle-mounted refrigerator 10 can achieve its initial cooling through the cooperation of the first and second drive devices, and restore the refrigerant medium to facilitate the vehicle-mounted refrigerator 10's subsequent cooling.

[0107] In some embodiments, such as Figure 8 As shown, the control method also includes: Step S11: Control the first drive device to start, introduce pure water into the heat exchange chamber 42, and control the second drive device to start, introduce protective liquid into the evaporator 3.

[0108] Step S12: Control the first drive device and the second drive device to shut down.

[0109] Step S13: Control the second drive device to start and introduce protective liquid into the heat exchange chamber 42.

[0110] In this way, the vehicle refrigerator 10 can be cooled again by the cooperation of the first drive device and the second drive device, and the refrigerant can be restored so that the vehicle refrigerator 10 can be cooled again.

[0111] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims. Those skilled in the art can understand that implementing all or part of the processes of the above embodiments and making equivalent changes according to the claims of this application still fall within the scope of this application.

Claims

1. A vehicle refrigerator (10) characterized by comprising: The device comprises a box (4), a water storage tank (1), an evaporator (3), a first driving device and a second driving device. The box (4) comprises a containing cavity (41) and a heat exchange cavity (42) arranged separately, the heat exchange cavity (42) is used for containing refrigerant, the refrigerant can have hydration reaction with water; the water storage tank (1) is arranged outside the box (4) and communicates with the heat exchange cavity (42) and is used for storing pure water; the evaporator (3) is arranged outside the box (4) and communicates with the heat exchange cavity (42) and is used for heat exchange with a heat source. The first driving device is arranged in the water storage tank (1) and is used for driving the pure water in the water storage tank (1) to flow into the heat exchange cavity (42); the second driving device is connected with the box (4) and the evaporator (3) and is used for driving the medium in the heat exchange cavity (42) to flow into the evaporator (3) or driving the medium in the evaporator (3) to flow into the heat exchange cavity (42).

2. The vehicle refrigerator (10) according to claim 1, characterized by The second driving device comprises a liquid storage tank (2) and a first pump body (7); the liquid storage tank (2) is used for storing protective liquid; the liquid storage tank (2) communicates with the heat exchange cavity (42) and the evaporator (3); The first pump body (7) is arranged in the liquid storage tank (2) and is used for driving the protective liquid to flow into the heat exchange cavity (42) or the evaporator (3).

3. The vehicle refrigerator (10) according to claim 2, characterized in that Further comprising a first pipeline (81), a second pipeline (82), a third pipeline (83) and a fourth pipeline (84); The inlet of the first pipeline (81) communicates with the water storage tank (1), the outlet of the first pipeline (81) communicates with a first position of the heat exchange cavity (42); the first end of the second pipeline (82) communicates with the liquid storage tank (2), the second end of the second pipeline (82) communicates with a second position of the heat exchange cavity (42); the first end of the third pipeline (83) communicates with the evaporator (3), the second end of the third pipeline (83) communicates with a third position of the heat exchange cavity (42); the first end of the fourth pipeline (84) communicates with the water storage tank (1), the second end of the fourth pipeline (84) communicates with the evaporator (3); In the vertical direction, the first position is below the second position; the third position is below the first position.

4. The vehicle refrigerator (10) according to claim 3, characterized in that Further comprising a first switch valve and a second switch valve; the first switch valve is connected with the first pipeline (81) and is used for controlling the opening or closing of the first pipeline (81); the second switch valve is connected with the third pipeline (83) and is used for controlling the opening or closing of the third pipeline (83).

5. The in-vehicle refrigerator (10) according to claim 1, characterized by Further comprising a condensing pipeline (85) and a third switch valve; the inlet of the condensing pipeline (85) communicates with the evaporator (3), the outlet of the condensing pipeline (85) communicates with the water storage tank (1); the third switch valve is connected with the condensing pipeline (85) and is used for controlling the opening or closing of the condensing pipeline (85).

6. The in-vehicle refrigerator (10) according to claim 1, characterized by The first driving device comprises a second pump body (6) arranged in the water storage tank (1) and configured to drive the purified water in the liquid storage tank (2) to flow into the containing cavity (41).

7. The in-vehicle refrigerator (10) according to claim 1, characterized by The evaporator (3) comprises a mounting plate (32) and a heat exchange plate (33), and an evaporation cavity (31) is formed between the mounting plate (32) and the heat exchange plate (33), the evaporation cavity is communicated with the heat exchange cavity (42), and the evaporation cavity is communicated with the liquid storage tank (2).

8. The vehicle refrigerator (10) according to claim 7, characterized in that The mounting plate (32) is configured to be connected to the top of the vehicle (100), and the heat exchange plate (33) is a glass plate.

9. The in-vehicle refrigerator (10) according to claim 3, characterized by The evaporator (3) comprises a mounting plate (32), a heat exchange plate (33), a first liquid inlet and outlet pipe, and a second liquid inlet and outlet pipe. The first end of the first liquid inlet and outlet pipe is communicated with the evaporation cavity, and the second end of the first liquid inlet and outlet pipe is communicated with the first end of the third pipeline; the first end of the second liquid inlet and outlet pipe is communicated with the evaporation cavity, and the second end of the second liquid inlet and outlet pipe is communicated with the second end of the fourth pipeline.

10. The in-vehicle refrigerator (10) according to claim 3, characterized by The water storage tank (1) comprises a first main body (11), a liquid inlet pipe (12), and a liquid outlet pipe (13); the first main body (11) is provided with a first cavity (111), and the second pump body (6) is arranged in the first cavity (111); the inlet of the liquid inlet pipe (12) is configured to be connected to a water source, and the outlet of the liquid inlet pipe (12) is communicated with the first cavity (111); the inlet of the liquid outlet pipe (13) is communicated with the second pump body (6), and the outlet of the liquid outlet pipe (13) is communicated with the inlet of the first pipeline (81).

11. The in-vehicle refrigerator (10) according to claim 3, characterized by The liquid storage tank (2) comprises a second main body (21), a third liquid inlet and outlet pipe (22), and a fourth liquid inlet and outlet pipe (23); the second main body (21) is provided with a second cavity (211), and the first pump body (7) is arranged in the second cavity (211); the first ends of the third liquid inlet and outlet pipe (22) and the fourth liquid inlet and outlet pipe (23) are selectively communicated with the first pump body (7), the second end of the third liquid inlet and outlet pipe (22) is communicated with the first end of the second pipeline (82), and the second end of the fourth liquid inlet and outlet pipe (23) is communicated with the first end of the fourth pipeline (84).

12. The in-vehicle refrigerator (10) according to claim 2, characterized by The second driving device comprises a liquid storage tank (2) and a first pump body (7); the liquid storage tank (2) is configured to store a protective liquid, the protective liquid is configured to cover above the refrigerant medium, the liquid storage tank (2) is communicated with the heat exchange cavity (42) and the evaporator (3), and the first pump body (7) is arranged in the liquid storage tank (2) and configured to drive the protective liquid to flow into the heat exchange cavity (42) or the evaporator (3). The vehicle-mounted refrigerator (10) further comprises a controller (5) connected to the tank body (4) and electrically connected with the first driving device and the second driving device; the controller (5) is configured to: control the first driving device to start and introduce the purified water into the heat exchange cavity (42). controlling the first driving device to be closed; controlling the second driving device to be started to introduce the protective liquid into the heat exchange cavity (42).

13. A vehicle (100), characterized in that The vehicle-mounted refrigerator (10) comprises the vehicle-mounted refrigerator (10) according to any one of claims 1-9.

14. A control method of a vehicle-mounted refrigerator (10), characterized by, comprising: controlling the first driving device to be started to introduce the pure water into the heat exchange cavity (42); controlling the first driving device to be closed; controlling the second driving device to be started to introduce the protective liquid into the heat exchange cavity (42).

15. The control method according to claim 14, characterized by, further comprising: controlling the first driving device to be started to introduce the pure water into the heat exchange cavity (42), and controlling the second driving device to be started to introduce the protective liquid into the evaporator (3); controlling the first driving device and the second driving device to be closed; controlling the second driving device to be started to introduce the protective liquid into the heat exchange cavity (42).

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