Engine circulating water heating system and cold chain transport air conditioning system

Abstract

The utility model belongs to the technical field of cold chain transport air conditioning, and discloses an engine circulating water heating system and a cold chain transport air conditioning system. The engine circulating water heating system includes an engine, a radiator water tank, a first heat exchanger and a second heat exchanger. The engine refrigerant outlet is connected to the radiator water tank inlet, and the radiator water tank outlet is connected to the engine refrigerant inlet to form a first loop. The first heat exchanger is connected in parallel with the radiator water tank, the engine and the first heat exchanger form a second loop, the first heat exchanger and the second heat exchanger are connected in series to form a third loop, and the first heat exchanger is located in a heat preservation space. The engine circulating water heating system takes into account the cooling requirements of the engine and the heating requirements of the heat preservation space, ensuring the maximum utilization of energy and saving costs. The cold chain transport air conditioning system includes a refrigeration system and the above-mentioned engine circulating water heating system, and uses the heat of the engine itself to heat the heat preservation space, with low energy consumption and cost savings.

Description

Technical Field

[0001] The utility model relates to the technical field of cold chain transportation air conditioning, and in particular to an engine circulating water heating system and a cold chain transportation air conditioning system. Background Art

[0002] Cold chain transportation refers to the transportation of goods at a certain temperature throughout the entire transportation process, whether it is loading and unloading, changing transportation methods, changing packaging equipment, etc. In other words, cold chain transportation is not just a simple cooling demand, but covers the dual needs of cooling and heating.

[0003] At present, in long-distance cold chain transportation, trailers usually use refrigeration machines (the refrigeration machine is located in an independent unit with its own engine) to cool the box, and heat the box through hot air heating and electric heating. However, these two heating methods have high energy consumption and high cost.

[0004] Therefore, it is urgent to propose an engine circulating water heating system and a cold chain transportation air conditioning system to solve the above problems. Utility Model Content

[0005] One purpose of the utility model is to provide an engine circulating water heating system, which can take into account the cooling requirements of the engine and the heating requirements of the insulation space, thereby ensuring the maximum utilization of energy and saving costs.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] An engine circulating water heating system is characterized in that it includes an engine, a radiator water tank, a first heat exchanger and a second heat exchanger, the engine refrigerant outlet is connected to the radiator water tank inlet, the radiator water tank outlet is connected to the engine refrigerant inlet to form a first circuit, the first heat exchanger is connected to the radiator water tank in parallel, the engine and the first heat exchanger form a second circuit, the first heat exchanger and the second heat exchanger are connected in series to form a third circuit, and the first heat exchanger is located in a heat preservation space.

[0008] As an optional technical solution of the engine circulating water heating system, the engine circulating water heating system also includes a solenoid valve, which connects the first heat exchanger and the second heat exchanger to control the connection and closing of the first heat exchanger and the second heat exchanger.

[0009] As an optional technical solution of the engine circulating water heating system, the engine circulating water heating system further includes a temperature sensor, and the temperature sensor is located between the solenoid valve and the first heat exchanger.

[0010] As an optional technical solution for the engine circulating water heating system, the engine circulating water heating system further includes a water pump, and the first heat exchanger, the water pump and the second heat exchanger are sequentially connected in series to form the third loop.

[0011] As an optional technical solution of the engine circulating water heating system, the third circuit further includes a one-way valve, and the one-way valve is located between the outlet of the second heat exchanger and the inlet of the first heat exchanger.

[0012] As an optional technical solution of the engine circulating water heating system, the engine circulating water heating system further includes two three-way valves, and the two three-way valves are respectively located at the inlet and outlet of the engine.

[0013] As an optional technical solution for the engine circulating water heating system, the first heat exchanger is a plate heat exchanger.

[0014] As an optional technical solution for the engine circulating water heating system, the second heat exchanger is a parallel flow heat exchanger.

[0015] Another object of the utility model is to provide a cold chain transportation air conditioning system, which can use the heat of the engine itself to heat the insulation space, with low energy consumption and cost savings.

[0016] To achieve this purpose, the utility model adopts the following technical solutions:

[0017] The cold chain transport air conditioning system comprises a refrigeration system and the above-mentioned engine circulating water heating system, wherein the refrigeration system is used to cool the thermal insulation space, and the engine circulating water heating system is used to heat the thermal insulation space.

[0018] As an optional technical solution for a cold chain transport air conditioning system, the refrigeration system includes a condenser and an evaporator, the condenser and the evaporator are connected in series, the second heat exchanger is located in front of the evaporator, and shares a second fan with the evaporator.

[0019] Beneficial effects of the utility model:

[0020] The engine circulating water heating system provided by the utility model comprises an engine, a radiator water tank, a first heat exchanger and a second heat exchanger. The engine refrigerant outlet is connected to the radiator water tank inlet, and the radiator water tank outlet is connected to the engine refrigerant inlet to form a first circuit. The engine refrigerant takes out the heat of the engine and exchanges heat with the outside air through the radiator water tank to cool the engine. The first heat exchanger is connected in parallel with the radiator water tank, and the engine and the first heat exchanger form a second circuit. The first heat exchanger and the second heat exchanger are connected in series to form a third circuit, and the first heat exchanger is located in a heat preservation space. The engine refrigerant takes out the heat of the engine, enters the first heat exchanger, and exchanges heat with the second heat exchanger, which can cool the engine. At the same time, the second heat exchanger can heat the heat preservation space after heat exchange with the first heat exchanger. The engine circulating water heating system takes into account the cooling requirements of the engine and the heating requirements of the heat preservation space, ensuring the maximum utilization of energy and saving costs.

[0021] The cold chain transport air conditioning system provided by the utility model comprises a refrigeration system and the above-mentioned engine circulating water heating system, and utilizes the heat of the engine itself to heat the heat preservation space, thereby having low energy consumption and cost saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a principle block diagram of an engine circulating water heating system provided by an embodiment of the utility model.

[0023] In the figure:

[0024] 1. Engine; 2. First heat exchanger; 3. Radiator; 4. First fan; 5. Water pump; 6. Solenoid valve; 7. Second heat exchanger; 8. Temperature sensor; 9. Second fan; 10. One-way valve; 11. Three-way valve. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0029] The engine circulating water heating system provided in this embodiment can take into account both the cooling requirements of the engine and the heating requirements of the insulation space, thereby ensuring maximum energy utilization and saving costs.

[0030] Specific as Figure 1 As shown, the engine circulating water heating system includes an engine 1, a heat sink 3, a first heat exchanger 2 and a second heat exchanger 7. The outlet of the engine 1 refrigerant is connected to the inlet of the heat sink 3. The outlet of the heat sink 3 is connected to the inlet of the engine 1 refrigerant to form a first loop. The engine 1 refrigerant takes out the heat of the engine 1, and a part of it enters the heat sink 3 and exchanges heat with the outside air through the heat sink 3 to cool the engine 1. The first heat exchanger 2 is connected in parallel with the heat sink 3, and the engine 1 and the first heat exchanger 2 form a second loop. The first heat exchanger 2 and the second heat exchanger 7 are connected in series to form a third loop. The first heat exchanger 2 is located in the heat preservation space. The engine 1 refrigerant takes out the heat of the engine 1, and another part enters the first heat exchanger 2 and exchanges heat with the second heat exchanger 7, which can also cool the engine 1. At the same time, the second heat exchanger 7 can heat the heat preservation space after heat exchange with the first heat exchanger 2. The engine circulating water heating system takes into account the cooling requirements of the engine 1 and the heating requirements of the heat preservation space, ensuring the maximum utilization of energy and saving costs.

[0031] Furthermore, the engine circulating water heating system further includes a solenoid valve 6, which connects the first heat exchanger 2 and the second heat exchanger 7, and controls the connection and closing of the first heat exchanger 2 and the second heat exchanger 7. When the heat preservation space does not need to be heated, the solenoid valve 6 is closed, and the first heat exchanger 2 and the second heat exchanger 7 do not exchange heat. When the heat preservation space needs to be heated, the solenoid valve 6 is opened, and the second heat exchanger 7 exchanges heat with the first heat exchanger 2, so that the second heat exchanger 7 can heat the heat preservation space.

[0032] It is worth noting that when the insulation space needs to be heated, since a portion of the heat of the engine 1 is utilized, the heat dissipation demand using the radiator water tank 3 will be reduced to meet the cooling demand of the engine 1. In this embodiment, the first fan 4 of the radiator water tank 3 is controlled to operate so that the engine 1 is at a set temperature.

[0033] Furthermore, in order to control the appropriate heating temperature, the engine circulating water heating system further includes a temperature sensor 8, which is located between the solenoid valve 6 and the first heat exchanger 2 to detect the fluid temperature.

[0034] Continue as Figure 1 As shown, the engine circulating water heating system further includes a water pump 5, and the first heat exchanger 2, the water pump 5 and the second heat exchanger 7 are sequentially connected in series to form a third loop. The water pump 5 presses the liquid in the first heat exchanger 2 into the second heat exchanger 7.

[0035] To prevent the liquid in the third circuit from flowing back, the third circuit also includes a one-way valve 10, which is located between the outlet of the second heat exchanger 7 and the inlet of the first heat exchanger 2, so that the liquid in the third circuit can only flow out of the second heat exchanger 7 and into the first heat exchanger 2.

[0036] Continue as Figure 1 As shown, the engine circulating water heating system further includes two three-way valves 11, which are respectively located at the inlet and outlet of the engine 1. The engine 1 coolant flows out through the three-way valve 11, one way enters the radiator water tank 3, and the other way enters the first heat exchanger 2; the coolant circulates through the first circuit and the second circuit and then enters the engine 1 through another three-way valve 11.

[0037] In this embodiment, the first heat exchanger 2 is a plate heat exchanger, which has the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small footprint, wide application, and long service life.

[0038] In this embodiment, the second heat exchanger 7 is a parallel flow heat exchanger. The parallel flow heat exchanger has high heat exchange efficiency, compact structure and space saving.

[0039] The cold chain transport air conditioning system provided in this embodiment can use the heat of the engine 1 itself to heat the insulation space, with low energy consumption and cost savings.

[0040] The cold chain transport air conditioning system includes a refrigeration system and the above-mentioned engine circulating water heating system, and utilizes the heat of the engine 1 itself to heat the heat preservation space, which has low energy consumption and saves costs.

[0041] The refrigeration system includes a condenser and an evaporator, which are connected in series. The second heat exchanger 7 is located in front of the evaporator and shares the second fan 9 with the evaporator, which not only saves space and makes the structure compact, but also can use the second fan 9 at the same time to reduce energy consumption.

[0042] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Engine circulating water heating system, characterized in that: The invention comprises an engine (1), a heat sink (3), a first heat exchanger (2) and a second heat exchanger (7); the refrigerant outlet of the engine (1) is connected to the inlet of the heat sink (3); the outlet of the heat sink (3) is connected to the refrigerant inlet of the engine (1) to form a first circuit; the first heat exchanger (2) is connected in parallel with the heat sink (3); the engine (1) and the first heat exchanger (2) form a second circuit; the first heat exchanger (2) and the second heat exchanger (7) are connected in series to form a third circuit; the first heat exchanger (2) is located in a heat preservation space.

2. The engine circulating water heating system according to claim 1, characterized in that: The engine circulating water heating system further comprises a solenoid valve (6), wherein the solenoid valve (6) connects the first heat exchanger (2) and the second heat exchanger (7) to control the connection and closing of the first heat exchanger (2) and the second heat exchanger (7).

3. The engine circulating water heating system according to claim 2, characterized in that: The engine circulating water heating system further comprises a temperature sensor (8), wherein the temperature sensor (8) is located between the solenoid valve (6) and the first heat exchanger (2).

4. The engine circulating water heating system according to claim 1, characterized in that: The engine circulating water heating system further comprises a water pump (5), and the first heat exchanger (2), the water pump (5) and the second heat exchanger (7) are sequentially connected in series to form the third loop.

5. The engine circulating water heating system according to claim 1, characterized in that: The third circuit further comprises a one-way valve (10), wherein the one-way valve (10) is located between the outlet of the second heat exchanger (7) and the inlet of the first heat exchanger (2).

6. The engine circulating water heating system according to claim 1, characterized in that: The engine circulating water heating system further comprises two three-way valves (11), wherein the two three-way valves (11) are respectively located at the inlet and outlet of the engine (1).

7. The engine circulating water heating system according to claim 1, characterized in that: The first heat exchanger (2) is a plate heat exchanger.

8. The engine circulating water heating system according to claim 1, characterized in that: The second heat exchanger (7) is a parallel flow heat exchanger.

9. Cold chain transport air conditioning system, characterized in that: It comprises a refrigeration system and the engine circulating water heating system according to any one of claims 1 to 8, wherein the refrigeration system is used for cooling the heat preservation space, and the engine circulating water heating system is used for heating the heat preservation space.

10. The cold chain transportation air conditioning system according to claim 9, characterized in that: The refrigeration system comprises a condenser and an evaporator, wherein the condenser and the evaporator are connected in series, and the second heat exchanger (7) is located in front of the evaporator and shares a second fan (9) with the evaporator.

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