Double-temperature single control system of vehicle-mounted refrigerator

Abstract

The utility model belongs to the technical field of vehicle-mounted refrigerators, and particularly relates to a double-temperature single control system of a vehicle-mounted refrigerator. The compressor conveys a refrigerant to the condenser for heat dissipation and cooling; the condenser is connected with the first evaporator through the throttling device, the first evaporator is connected with the second evaporator in series, and the second evaporator is connected with the compressor to form a complete refrigerating system. The second evaporator is externally connected with a temperature control point, the first evaporator is of a main evaporator structure, and the second evaporator is of an auxiliary evaporator structure. Temperature control in the two boxes can be achieved through single-point control, the cost caused by additionally arranging a liquid storage device and a corresponding pipeline for coping with too many refrigerants in the small box refrigeration process of a double-temperature double-control system can be avoided, and meanwhile the situation that too many welding points exist in a foaming layer of the box body, assembling is not facilitated, and the risk of welding leakage exists is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle-mounted refrigerators, and in particular relates to a dual-temperature single control system for a vehicle-mounted refrigerator. Background Art

[0002] Conventional double-box car refrigerators mostly use a dual-temperature dual-control refrigeration system. Because the two boxes are refrigerated separately, when there is a large difference in the evaporation area between the large box and the small box, the amount of refrigerant to be injected needs to be evaluated based on the evaporation area of ​​the large box. This will result in too much refrigerant in the system when the small box is refrigerated separately. It is necessary to add a liquid reservoir and connecting pipes to solve the problem of too low return liquid or return air temperature, ice or condensation in the return air pipe. This solution not only increases the cost of the product (adding a liquid reservoir and connecting pipes), but also increases the amount of refrigerant injected. The pipe connection is more complicated and there are more welding points. Utility Model Content

[0003] In order to solve the defects and shortcomings of the prior art; the purpose of the utility model is to provide a dual-temperature single control system for a vehicle refrigerator which has a simple structure, reasonable design and easy use. It can realize the temperature control of two boxes through single-point control, and can avoid the cost of adding a liquid storage tank and corresponding pipelines to cope with the excessive refrigerant when the dual-temperature dual-control system is used in the small box for refrigeration. At the same time, it avoids the existence of too many welding points in the foaming layer of the box body, which is not conducive to assembly and has the risk of welding leakage.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: it includes a compressor, a condenser, a throttling device, an evaporator 1, an evaporator 2, and a temperature control point; the compressor transports the refrigerant to the condenser for heat dissipation and cooling; the condenser is connected to the evaporator 1 through the throttling device, the evaporator 1 and the evaporator 2 are connected in series, and the evaporator 2 is connected to the compressor to form a complete refrigeration system; the evaporator 2 is externally connected to the temperature control point, wherein the evaporator 1 is a main evaporator structure and the evaporator 2 is an auxiliary evaporator structure.

[0005] Preferably, the evaporation surfaces of the evaporator 1 and the evaporator 2 are proportional to the volumes of the primary and secondary insulation boxes of the double-box vehicle refrigerator.

[0006] Preferably, the first evaporator is an evaporator with a large evaporation surface, and the second evaporator is an evaporator with a small evaporation surface.

[0007] Preferably, the temperature control point is connected to the compressor control circuit to form an automatic temperature control system for a double-box vehicle refrigerator.

[0008] Preferably, the evaporator 1 and the evaporator 2 are connected in series, and the evaporator 1 is arranged at the front end of the evaporator 2. According to the flow order of the refrigerant, the evaporator 1 serves as a primary refrigeration device and the evaporator 2 serves as a secondary refrigeration device.

[0009] After adopting the above structure, the beneficial effects of the utility model are as follows: it can realize temperature control in two boxes through single-point control, which can avoid the cost of adding a liquid storage tank and corresponding pipelines to cope with the excessive refrigerant in the dual-temperature dual-control system when the small box is refrigerated, and at the same time avoid the existence of too many welding points in the foaming layer of the box body, which is not conducive to assembly and has the risk of welding leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model is described in detail through the following specific implementations and drawings.

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Explanation of the reference numerals: compressor 1, condenser 2, throttling device 3, evaporator 1 4, evaporator 2 5, temperature control point 6. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described below by specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0014] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0015] See Figure 1 As shown, this specific implementation adopts the following technical scheme: it includes a compressor 1, a condenser 2, a throttling device 3, an evaporator 1 4, an evaporator 2 5, and a temperature control point 6; the compressor 1 transports the refrigerant to the condenser 2 for heat dissipation and cooling; the condenser 2 is connected to the evaporator 1 4 through the throttling device 3, the evaporator 1 4 and the evaporator 2 5 are connected in series, and the evaporator 2 5 is connected to the compressor 1 to form a complete refrigeration system; the evaporator 2 5 is externally connected to the temperature control point 6, wherein the evaporator 1 4 is a main evaporator structure and the evaporator 2 5 is an auxiliary evaporator structure.

[0016] Among them, the evaporation surface of the evaporator 1 4 and the evaporator 2 5 is proportional to the volume of the main and auxiliary insulation boxes of the double-box vehicle refrigerator. The evaporator 1 4 is an evaporator with a large evaporation surface, and the evaporator 2 5 is an evaporator with a small evaporation surface.

[0017] In addition, the temperature control point 6 is connected to the compressor 1 control circuit to form an automatic temperature control system for a double-box vehicle refrigerator; the evaporator 1 4 and the evaporator 2 5 are connected in series, and the evaporator 1 4 is arranged at the front end of the evaporator 2 5. According to the flow order of the refrigerant, the evaporator 1 4 serves as a primary refrigeration device, and the evaporator 2 5 serves as a secondary refrigeration device.

[0018] The working principle of this specific implementation is:

[0019] 1. When applied to double-box car refrigerators, the large-box evaporator and the small-box evaporator can be designed in series. The refrigerant can flow through the large-box evaporator or the small-box evaporator first, and the temperature can be controlled by calculating the large-box load and the small-box load and designing different evaporation areas.

[0020] 2. By controlling the temperature inside the box corresponding to the evaporator through which the refrigerant flows last as the control point, the compressor stops when the temperature inside the box corresponding to the evaporator through which the refrigerant flows last reaches the set requirement; because the evaporation temperature of the evaporator that the refrigerant flows first is lower, and the evaporation area is calculated and matched to fully meet the box load, the box temperature can also reach the design temperature.

[0021] This specific implementation can achieve temperature control in two boxes through single-point control, which can avoid the cost of adding a liquid storage tank and corresponding pipelines to cope with the excessive refrigerant when the small box is refrigerated in the dual-temperature dual-control system. At the same time, it avoids the existence of too many welding points in the foam layer of the box body, which is not conducive to assembly and has the risk of welding leakage.

[0022] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0023] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A dual-temperature single control system for a vehicle refrigerator, characterized in that: It includes a compressor, a condenser, a throttling device, an evaporator 1, an evaporator 2, and a temperature control point; the compressor transports the refrigerant to the condenser for heat dissipation and cooling; the condenser is connected to the evaporator 1 through the throttling device, the evaporator 1 and the evaporator 2 are connected in series, and the evaporator 2 is connected to the compressor to form a complete refrigeration system; the evaporator 2 is externally connected to the temperature control point, wherein the evaporator 1 is an evaporator with a large evaporation surface, and the evaporator 2 is an evaporator with a small evaporation surface.

2. A dual-temperature single control system for a vehicle refrigerator according to claim 1, characterized in that: The evaporation surfaces of the evaporator 1 and the evaporator 2 are proportional to the volumes of the main and auxiliary insulation boxes of the double-box vehicle refrigerator.

3. The dual-temperature single control system for a vehicle refrigerator according to claim 1, characterized in that: The evaporator 1 is arranged in the main insulation box of the double-box vehicle refrigerator, and the evaporator 2 is arranged in the auxiliary insulation box of the double-box vehicle refrigerator.

4. The dual-temperature single control system for a vehicle refrigerator according to claim 1, characterized in that: The temperature control point is connected with the compressor control circuit to form an automatic temperature control system for the double-box vehicle refrigerator.

5. The dual-temperature single control system for a vehicle refrigerator according to claim 1, characterized in that: The evaporator 1 and the evaporator 2 are connected in series, and the evaporator 1 is arranged at the front end of the evaporator 2. According to the flow order of the refrigerant, the evaporator 1 serves as a primary refrigeration device and the evaporator 2 serves as a secondary refrigeration device.

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