Single-system multi-capillary refrigeration structure of vehicle-mounted refrigerator

Abstract

The utility model belongs to the technical field of vehicle-mounted refrigerators, and particularly relates to a single-system multi-capillary refrigeration structure of a vehicle-mounted refrigerator. The compressor guides a refrigerant into the condenser for cooling, the tail of the condenser is connected with a first capillary tube, a second capillary tube and a third capillary tube through an electromagnetic switching valve, the first capillary tube, the second capillary tube and the third capillary tube are all connected to the evaporator, and the evaporator is connected with the compressor through an air return heat exchange tube. The flow of the first capillary tube, the flow of the second capillary tube and the flow of the third capillary tube are gradually reduced from large to small. The electromagnetic valve is additionally arranged and connected with the capillary tubes with different flows to meet the requirements under different thermal load conditions, the large-flow capillary tubes are used in the early stage of large thermal load, the capillary tubes with different flows are switched according to temperature differences in the process, and the requirement for low-temperature refrigerating capacity stability is met while rapid cooling is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of vehicle refrigerator, especially a single system multi capillary tube refrigeration structure of vehicle refrigerator. BACKGROUND

[0002] With the development of new energy automobile market, the demand for vehicle refrigerator is higher and higher, and the user's requirement for the cooling speed and refrigeration low temperature capacity of the refrigerator is also higher and higher, the single capillary tube flow of the existing refrigerator cannot meet the low temperature demand of large heat load in the early stage and stable refrigeration in the later stage. UTILITY MODEL CONTENTS

[0003] In order to solve the defects and problems of prior art, the utility model discloses a single system multi capillary tube refrigeration structure of vehicle refrigerator, which is simple in structure, reasonable in design and convenient to use, increases an electromagnetic valve and connects different flow capillary tubes to meet the demand under different heat load conditions, uses a large flow capillary tube in the early stage of large heat load, and switches different flow capillary tubes according to the temperature difference in the process, so that the rapid cooling is realized and the stable demand of low temperature refrigeration capacity is ensured.

[0004] In order to achieve the above object, the utility model adopts the technical scheme of: it contains compressor, condenser, electromagnetic switch valve, capillary tube one, capillary tube two, capillary tube three, evaporator, back gas heat exchange pipe, the compressor imports refrigerant into the condenser to cool down, the tail of the condenser is connected with capillary tube one, capillary tube two and capillary tube three through the electromagnetic switch valve, capillary tube one, capillary tube two and capillary tube three are connected on the evaporator, and the evaporator is connected with the compressor through the back gas heat exchange pipe, wherein the flow of capillary tube one, capillary tube two and capillary tube three decreases gradually from large to small.

[0005] As a preferred, the electromagnetic switch valve is a one-in-three-out electromagnetic valve structure, and the three outlets are connected with capillary tube one, capillary tube two and capillary tube three respectively.

[0006] As a preferred, capillary tube one, capillary tube two and capillary tube three are sleeved together in a spiral structure.

[0007] As a preferred, the diameters of capillary tube one, capillary tube two and capillary tube three change correspondingly according to the flow.

[0008] As a preferred, the electromagnetic switch valve and the compressor are connected on the same control system, and the compression power of the compressor and the delivery direction of the electromagnetic switch valve are kept corresponding.

[0009] As a preferred, capillary tube one, capillary tube two and capillary tube three are sleeved layer by layer from outside to inside in a spiral structure, and an isolation sleeve is arranged between adjacent capillary tubes.

[0010] As preferred, the capillary one, capillary two and capillary three are twisted into a cylindrical structure in the same diameter.

[0011] As preferred, the compressor corresponds to the electromagnetic switching valve control system, so that the compressor output power can match the capillary of different flow.

[0012] As preferred, the capillary one, capillary two and capillary three are wrapped with a heat preservation layer.

[0013] As preferred, the capillary one, capillary two and capillary three have the same outer diameter and change the flow by changing the inner diameter.

[0014] As preferred, the capillary one, capillary two and capillary three are provided with a one-way valve at the output end to avoid the problem of backflow during switching.

[0015] After the above structure is adopted, the utility model has the beneficial effects that it increases the electromagnetic valve, sets different flow capillary to meet the demand under different heat load conditions, uses different capillary effect, adjusts and controls the evaporation pressure, realizes different refrigeration demand, uses large flow capillary in the early stage of large heat load, the evaporation pressure is slightly high, and different flow capillary is switched according to the temperature difference in the refrigeration process, so that the rapid cooling is realized, and the stable demand of low-temperature refrigeration capacity is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the utility model is described in detail by the following specific implementation and drawings.

[0017] Figure 1 It is the structure schematic view of the utility model;

[0018] Figure 2 It is the capillary winding structure schematic of the utility model Figure 1 ;

[0019] Figure 3 It is the capillary winding structure schematic of the utility model Figure 2 ;

[0020] Figure 4 It is the structure schematic view of the second specific implementation of the utility model;

[0021] The figure mark explanation: compressor 1, condenser 2, electromagnetic switching valve 3, capillary one 4, capillary two 5, capillary three 6, evaporator 7, back gas heat exchange pipe 8, electromagnetic tee one 31, electromagnetic tee two 32. Specific implementation

[0022] For the purposes of the present application, technical solutions and advantages to be clearer and more apparent, the following specific embodiments shown in the drawings to describe the present application. However, it should be understood that these descriptions are exemplary, and not to limit the scope of the present application. In addition, in the following description, the description of the known structure and technology, to avoid unnecessary confusion of the concept of the present application.

[0023] Here, it should be noted that, in order to avoid unnecessary details blurred the present application, only in the drawings shown in close relation to the scheme according to the present application structure and / or processing steps, and omitted other details of little relevance to the present application.

[0024] Specific implementation mode: Embodiment

[0025] Referring to Figures 1-3 The present embodiment adopts the following technical solutions: it contains compressor 1, condenser 2, electromagnetic switching valve 3, capillary tube 4, capillary tube 5, capillary tube 6, evaporator 7, back gas heat exchange tube 8; The compressor 1 is introduced into the condenser 2 to cool down, the condenser 2 tail through the electromagnetic switching valve 3 is connected with capillary tube 4, capillary tube 5, capillary tube 6, capillary tube 4, capillary tube 5, capillary tube 6 are connected to the evaporator 7, evaporator 7 through the back gas heat exchange tube 8 and compressor 1 connection, wherein, the capillary tube 4, capillary tube 5, capillary tube 6 from large to small gradually reduced.

[0026] Among them, the electromagnetic switching valve 3 is a three-way electromagnetic valve structure, three outlets are connected with capillary tube 4, capillary tube 5, capillary tube 6; The capillary tube 4, capillary tube 5, capillary tube 6 are connected together in spiral structure; Large flow capillary tube 4 is arranged in the outer ring, small flow capillary tube 6 is arranged in the embedded. The electromagnetic switching valve 3 and compressor 1 are connected in the same control system, the compressor 1 compression power and electromagnetic switching valve 3 delivery direction remains corresponding. When the electromagnetic switching valve 3 is connected with capillary tube 4, the compressor 1 automatically increases the power to meet the large flow under the refrigerant delivery.

[0027] Further, the capillary tube one 4, the capillary tube two 5 and the capillary tube three 6 are spirally arranged from outside to inside, and a separation sleeve 9 is arranged between adjacent capillary tubes; meanwhile, the capillary tube one 4, the capillary tube two 5 and the capillary tube three 6 can also be spirally twisted with the same diameter to form a cylindrical structure; the compressor 1 and the electromagnetic switching valve 3 control system correspond to each other, so that the output power of the compressor 1 can match capillary tubes with different flow rates; the outer surface of the capillary tube one 4, the capillary tube two 5 and the capillary tube three 6 is wrapped with a heat preservation layer. The capillary tube one 4, the capillary tube two 5 and the capillary tube three 6 have the same outer diameter and change the flow rate by changing the inner diameter; the output end of each of the capillary tube one 4, the capillary tube two 5 and the capillary tube three 6 is provided with a one-way valve to avoid the problem of backflow during switching.

[0028] The working principle of the embodiment is as follows:

[0029] 1. After power-on, the difference between the temperature sensed by the temperature sensor in the box and the set position of the refrigerator is determined. If the difference is greater than or equal to 10, the electromagnetic valve opens the capillary tube one 4 channel and closes the capillary tube two 5 and the capillary tube three 6 channels.

[0030] 2. If the difference between the temperature sensed by the temperature sensor in the box and the set position of the refrigerator is less than 10 and greater than 2, switch to the capillary tube two 5 channel, and close the capillary tube one 4 and the capillary tube three 6 channels.

[0031] 3. If the difference between the temperature sensed by the temperature sensor in the box and the set position of the refrigerator is less than or equal to 2, use the capillary tube three 6 channel to achieve the lowest refrigeration temperature and ensure the stability of the lowest temperature.

[0032] 4. According to the different heat loads, the design changes the evaporation pressure by controlling the flow rate of the capillary tube, and the different evaporation pressures affect the evaporation temperature. Embodiment

[0033] Reference Figure 4 The difference between the embodiment and the first embodiment is that the electromagnetic switching valve 3 is removed, the capillary tube one 4, the capillary tube two 5 and the capillary tube three 6 are connected in series, and the electromagnetic three-way valve one 31 and the electromagnetic three-way valve two 32 are added between the capillary tube one 4 and the capillary tube two 5 and between the capillary tube two 5 and the capillary tube three 6; the bypass of the electromagnetic three-way valve one 31 and the electromagnetic three-way valve two 32 is connected to the evaporator 7, thereby forming a controllable progressive increase structure of the three-section capillary tube one 4, the capillary tube two 5 and the capillary tube three 6.

[0034] The embodiment has the beneficial effect that the number of capillary tubes is progressively increased to adjust the refrigeration efficiency, and the capillary tubes can be widely distributed at different positions of the inner container to provide coverage for refrigeration, thereby improving the refrigeration response efficiency.

[0035] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the appended claims and not by the above description, which is therefore intended to be included within the present application insofar as it falls within the meaning and the scope of the equivalent elements of the claims.

[0036] Furthermore, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment exhibits only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the present specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. A single-system multi-capillary tube refrigeration structure for a vehicle-mounted refrigerator, characterized in that: It contains compressor, condenser, electromagnetic switch valve, capillary one, capillary two, capillary three, evaporator, back gas heat exchange pipe; The compressor imports refrigerant into the condenser for cooling, the tail of the condenser is connected with capillary one, capillary two and capillary three through the electromagnetic switch valve, capillary one, capillary two and capillary three are connected to the evaporator, and the evaporator is connected with the compressor through the back gas heat exchange pipe, wherein the flow of capillary one, capillary two and capillary three decreases gradually from large to small.

2. The single system multi-capillary refrigeration structure of a vehicle-mounted refrigerator according to claim 1, characterized in that: The electromagnetic switch valve is a three-outlet electromagnetic valve structure, and the three outlets are connected with capillary one, capillary two and capillary three respectively.

3. The single system multi-capillary refrigeration structure of a vehicle-mounted refrigerator according to claim 2, characterized in that: The capillary one, capillary two and capillary three change in diameter according to the different flow.

4. The single system multi-capillary refrigeration structure of the car refrigerator according to claim 2, characterized in that: The electromagnetic switch valve and the compressor are connected on the same control system, and the compression power of the compressor is matched with the delivery direction of the electromagnetic switch valve.

5. The single system multi-capillary refrigeration structure of the car refrigerator according to claim 3, characterized in that: The capillary one, capillary two and capillary three are spirally connected from outside to inside, and isolation sleeves are arranged between adjacent capillaries.

6. The single system multi-capillary refrigeration structure of a vehicle-mounted refrigerator according to claim 3, characterized in that: The capillary one, capillary two and capillary three are spirally twisted to form a cylindrical structure.

7. The single system multi-capillary refrigeration structure of a vehicle-mounted refrigerator according to claim 1, characterized in that: The compressor and the electromagnetic switch valve control system are matched, so that the output power of the compressor can match the capillary with different flow.

8. The single system multi-capillary refrigeration structure of a vehicle-mounted refrigerator according to claim 1, characterized in that: The capillary one, capillary two and capillary three are wrapped with a heat preservation layer.

9. The single system multi-capillary refrigeration structure of a vehicle-mounted refrigerator according to claim 3, characterized in that: The capillary one, capillary two and capillary three have the same outer diameter and change the flow by changing the inner diameter.

10. The single system multi-capillary refrigeration structure of a vehicle-mounted refrigerator according to claim 3, characterized in that: The output end of the capillary one, capillary two and capillary three is provided with a check valve to avoid the problem of backflow in the switching process.

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