Vehicle-mounted refrigerator capable of achieving rapid cooling within short time
By introducing a secondary condenser and heating film structure into the vehicle refrigerator, the secondary evaporation of refrigerant in the return gas pipeline is controlled, which solves the problems of slow cooling speed and liquid slugging risk in the initial stage of the vehicle refrigerator, and achieves rapid cooling and system stability.
Patent Information
- Application Number
- CN202520003732.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-01-02
AI Technical Summary
Existing vehicle refrigerators have a slow cooling speed in the initial stage and pose a risk of liquid slugging in the compressor, and cannot effectively control the amount of refrigerant under different heat load conditions.
By redesigning the refrigeration system, introducing a secondary condenser and a return gas temperature sensor, and using electronic switching valves and three-way valves to control the secondary evaporation of refrigerant in the return gas line, combined with a heating film structure to regulate heat load changes, rapid cooling is achieved and liquid slugging is avoided.
It achieves rapid cooling under different heat load conditions, avoids the risk of icing in the return gas pipeline and liquid slugging in the compressor, and ensures stable system operation.
Smart Images
Figure CN223807437U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of vehicle refrigerator, especially relates to a vehicle refrigerator capable of realizing rapid cooling in a short time. BACKGROUND
[0002] The current vehicle refrigerator, the customer is more and more high to initial stage refrigerator cooling rate requirement.But the initial stage heat load is larger, and a certain amount of liquid refrigerant cannot complete the gasification heat absorption process of the whole evaporator, but if the refrigerant amount is increased, with the heat load of the box body decreases, it will also lead to the temperature of the gas return outlet being too low, the pipe line of the box body icing, and the risk of liquid strike to the compressor.A vehicle refrigerator capable of realizing rapid cooling in a short time is provided for the problem of liquid strike of the compressor. SUMMARY
[0003] To solve the defects and problems of prior art, the utility model discloses a vehicle refrigerator capable of realizing rapid cooling in a short time, which has simple structure, reasonable design and convenient use, and through the redesign of the refrigeration system, the refrigerant can realize secondary evaporation in the gas return pipe line through the control of the control logic, and the signal feedback of the temperature sensor in the gas return pipe line can meet the control requirements of large and small heat loads.
[0004] To achieve the above purpose, the utility model adopts the technical scheme of: it contains compressor, electronic switching valve, three-way valve, main condenser, evaporator, auxiliary condenser, gas return pipe line, gas return temperature sensor;The compressor transports the compressed refrigerant to the main condenser for heat release and cooling, and then transports the evaporator to cool the inner container, and then returns to the compressor through the gas return pipe line and the gas return temperature sensor, wherein the compressor is connected with the main condenser through the electronic switching valve and the three-way valve, and the auxiliary condenser is connected between the electronic switching valve and the three-way valve, and the auxiliary condenser is combined with the gas return pipe line.
[0005] As a preferred, the gas return pipe line is embedded in the gap of the fin surface of the auxiliary condenser.
[0006] As a preferred, the auxiliary condenser is switched between series connection and closing with the main condenser under the cooperation of the electronic switching valve and the three-way valve.
[0007] As a preferred, the copper pipes in the auxiliary condenser and the gas return pipe line are twisted together in double helix structure.
[0008] As a preferred, the conveying direction of the auxiliary condenser is opposite to the conveying direction of the gas return pipe line to form a high-efficiency heat exchange structure.
[0009] As a preferred, the evaporator, the auxiliary condenser, the gas return pipe line and the gas return temperature sensor are all arranged inside the vehicle refrigerator shell.
[0010] As preferred, the sub-condenser, the electronic switching valve and the three-way valve are replaced by the heating film and an external electric heating structure.
[0011] As preferred, the heating film one is connected with the electric heating film two in parallel at two ends, and the electric heating film two is combined with the inner container to expand the heating structure.
[0012] As preferred, the heating film one is wrapped in a spiral structure on the surface of the sub-condenser, and the electric heating film two is attached to the surface of the inner container.
[0013] As preferred, the heating film one and the electric heating film two are controlled by independent control switches to realize independent control.
[0014] After the above structure is adopted, the beneficial effects of the present application are as follows: through the change of the structure, the refrigerant in the return air pipeline is evaporated twice; on the one hand, the vehicle-mounted refrigerator can realize rapid cooling under a large heat load, and on the other hand, the normal temperature of the return air pipeline out of the box can be ensured after the heat load is reduced, thereby solving the risk of liquid impact on the compressor. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the present application is described in detail by the following specific embodiments and drawings.
[0016] Figure 1 It is a structural schematic diagram of the present application;
[0017] Figure 2 It is a structural schematic diagram of the second specific embodiment of the present application;
[0018] The reference signs are as follows: compressor 1, electronic switching valve 2, three-way valve 3, main condenser 4, evaporator 5, sub-condenser 6, return air pipeline 7, return air temperature sensor 8, heating film one 9, and electric heating film two 10. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the following describes the present application by the specific embodiments shown in the drawings. However, it should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the present application. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.
[0020] Here, it also needs to be explained that, in order to avoid the present application being obscured by unnecessary details, only the structures and / or processing steps closely related to the scheme according to the present application are shown in the drawings, and other details not closely related to the present application are omitted.
[0021] Referring toFigure 1 The embodiment adopts the following technical scheme: it comprises a compressor 1, an electronic switching valve 2, a three-way valve 3, a main condenser 4, an evaporator 5, a sub-condenser 6, a return gas pipeline 7, and a return gas temperature sensor 8; the compressor 1 delivers compressed refrigerant to the main condenser 4 for heat release and cooling, and then delivers the refrigerant to the evaporator 5 for cooling the inner container, and then the refrigerant flows back to the compressor 1 through the return gas pipeline 7 and the return gas temperature sensor 8, wherein the compressor 1 is connected with the main condenser 4 through the electronic switching valve 2 and the three-way valve 3, the electronic switching valve 2 is connected with the three-way valve 3 through the sub-condenser 6, and the sub-condenser 6 is combined with the return gas pipeline 7.
[0022] The return gas pipeline 7 is embedded in the gap between the fins on the surface of the sub-condenser 6; the sub-condenser 6 is switched between being connected in series with the main condenser 4 and being closed under the cooperation of the electronic switching valve 2 and the three-way valve 3.
[0023] Further, the copper pipes in the sub-condenser 6 and the return gas pipeline 7 are twisted together in a double helix structure; the delivery direction of the sub-condenser 6 is opposite to the delivery direction of the return gas pipeline 7 to form a high-efficiency heat exchange structure; the evaporator 5, the sub-condenser 6, the return gas pipeline 7, and the return gas temperature sensor 8 are all arranged inside the vehicle-mounted refrigerator shell.
[0024] The working process of the embodiment is as follows:
[0025] 1. Adjust the refrigerant amount according to the initial heat load;
[0026] 2. After power-on, determine the difference between the temperature sensed by the box temperature sensor and the set position of the refrigerator; if ≥10℃, close the path of the sub-condenser 6 through the electronic switching valve 2, and normally start the condenser fan of the main condenser 4;
[0027] 3. If the difference between the temperature sensed by the box temperature sensor and the set position of the refrigerator is <10℃, determine the temperature difference between the temperature at the outlet of the return gas pipeline 7 and the temperature of the ambient temperature sensor through the return gas temperature sensor 8; if <8℃, close the path of the sub-condenser 6 through the electronic switching valve 2, and normally start the condenser fan of the main condenser 4 without changing the path;
[0028] 4. If the difference between the temperature sensed by the box temperature sensor and the set position of the refrigerator is <10℃, and the temperature difference between the temperature at the outlet of the return gas pipeline 7 and the temperature of the ambient temperature sensor is ≥8℃, open the path of the sub-condenser 6 through the electronic switching valve 2, heat the return gas pipeline 7 through the sub-condenser 6, and at the same time, cool the sub-condenser 6, and close the condenser fan to avoid the risk of liquid hammering. Embodiment
[0029] Reference Figure 2The difference between the specific embodiment and the first specific embodiment is that the auxiliary condenser 6, the electronic switching valve 2 and the three-way valve 3 are replaced by a heating film one 9 to form an external electric heating structure; the heating film one 9 is connected in parallel with a heating film two 10 at both ends, and the heating film two 10 is combined with the inner container to expand the heating structure. The heating film one 9 is wrapped in a spiral structure on the surface of the auxiliary condenser 6, and the heating film two 10 is attached to the surface of the inner container. The heating film one 9 and the heating film two 10 are controlled by independent control switches to realize independent control.
[0030] The working process of the specific embodiment is as follows:
[0031] 1. Adjust the refrigerant amount according to the initial heat load;
[0032] 2. After power-on, determine the difference between the temperature sensed by the box temperature sensor and the set position of the refrigerator. If the difference is greater than or equal to 10 DEG C, the electronic switching valve 2 closes the path of the auxiliary condenser 6, and the condensing fan of the main condenser 4 is normally started;
[0033] 3. If the difference between the temperature sensed by the box temperature sensor and the set position of the refrigerator is less than 10 DEG C, determine the temperature difference between the temperature at the outlet of the return air pipe 7 and the temperature of the ambient temperature sensor through the return air temperature sensor 8. If the temperature difference is less than 8 DEG C, the electronic switching valve 2 closes the path of the auxiliary condenser 6, and the condensing fan of the main condenser 4 is normally started without changing the path;
[0034] 4. If the difference between the temperature sensed by the box temperature sensor and the set position of the refrigerator is less than 10 DEG C, and the temperature difference between the temperature at the outlet of the return air pipe 7 and the temperature of the ambient temperature sensor is greater than or equal to 8 DEG C as determined by the return air temperature sensor 8, the heating film one 9 with a certain power starts to work, so that the return air pipe 7 is secondarily evaporated to avoid the risk of liquid impact; at the same time, the heating film one 9 and the heating film two 10 work simultaneously during the heating function, without reducing the heat power and without affecting the expanded heating function.
[0035] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model.
[0036] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.
Claims
1. A vehicle-mounted refrigerator capable of rapid cooling in a short time, characterized in that: It contains compressor, electronic switching valve, three-way valve, main condenser, evaporator, sub-condenser, back gas pipeline, back gas temperature sensor; the compressor transports compressed refrigerant to the main condenser to release heat and cool down, then transports to the evaporator to cool the inner container, and then returns to the compressor through the back gas pipeline and back gas temperature sensor, wherein the compressor is connected with the main condenser through the electronic switching valve and the three-way valve, and the electronic switching valve and the three-way valve are connected with the sub-condenser, and the sub-condenser is combined with the back gas pipeline.
2. The vehicle-mounted refrigerator capable of achieving rapid cooling in a short time according to claim 1, characterized in that: The back gas pipeline is embedded in the gap between the fins on the surface of the sub-condenser; the copper pipes in the sub-condenser and the back gas pipeline are twisted together in a double helix structure.
3. The vehicle-mounted refrigerator capable of achieving rapid cooling in a short time according to claim 2, characterized in that: The sub-condenser is switched between series connection and closing with the main condenser under the cooperation of the electronic switching valve and the three-way valve.
4. The vehicle-mounted refrigerator capable of achieving rapid cooling in a short time according to claim 2, characterized in that: The delivery direction of the sub-condenser is opposite to the delivery direction of the back gas pipeline to form a high-efficiency heat exchange structure.
5. The vehicle-mounted refrigerator capable of achieving rapid cooling in a short time according to claim 1, characterized in that: The evaporator, the sub-condenser, the back gas pipeline and the back gas temperature sensor are all arranged inside the vehicle-mounted refrigerator shell.
6. The vehicle-mounted refrigerator capable of achieving rapid cooling in a short time according to claim 1, characterized in that: The sub-condenser, the electronic switching valve and the three-way valve are replaced by a heating film to form an external electric heating structure.
7. The vehicle-mounted refrigerator capable of achieving rapid cooling in a short time according to claim 6, characterized in that: The heating film one is connected in parallel with an electric heating film two at both ends, and the electric heating film two is combined with the inner container to expand the heating structure.
8. The vehicle-mounted refrigerator capable of achieving rapid cooling in a short time according to claim 7, characterized in that: The heating film one is wrapped around the surface of the sub-condenser in a spiral structure, and the electric heating film two is attached to the surface of the inner container; the heating film one and the electric heating film two are controlled by independent control switches to realize independent control.