A parking air conditioning system and a crane

Abstract

The utility model discloses a parking air conditioning system, including a refrigeration system and a heating system; the refrigeration system includes a main engine and an auxiliary engine connected to an oil tank, the main engine and the auxiliary engine are connected to a condenser through a compressor A and a compressor B respectively, and are connected to a liquid storage device and an evaporator, and are connected to the condenser and the liquid storage device through a controller; the heating system includes a low-temperature starting heater with a built-in water pump, the water outlet pipeline of the water pump is connected to an air conditioning warm air water tank through an air conditioning electric control water valve, and the air conditioning warm air water tank has two parallel water outlets, one of which is connected to the engine water tank through a normally open electric control water valve, and the engine water tank water outlet pipeline returns to the water pump of the low-temperature starting heater through the main engine; the other is connected to the PTC heater through a normally closed electric control water valve, and the water outlet of the PTC heater is connected to the water pump of the low-temperature starting heater. A crane includes the above-mentioned parking air conditioning system, which adopts a variety of control schemes in the main engine driven air conditioning system in combination with the change of the power source, and the air conditioning can work normally when the whole machine is working and when the vehicle is parked.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a parking air conditioning system and a crane. Background Art

[0002] Crawler cranes are an important category of lifting machinery. They have the advantages of high lifting performance, load-carrying travel, and adaptability to complex environments. Therefore, they play an important role in the construction of infrastructure, wind power, nuclear power, petrochemicals, etc.

[0003] Since crawler cranes often work in high or low temperature environments, they are usually equipped with air conditioning.

[0004] For existing crawler cranes, air conditioning and refrigeration are generally achieved by the main engine driving the compressor to compress the gaseous refrigerant for circulation refrigeration; heating is generally achieved by the main engine circulating the heat medium into the control room for heating. However, crawler cranes are intermittent working equipment, and the parking time is significantly longer than the working time. When parked, due to the large power of the main engine, using the main engine to achieve air conditioning and heating is costly and environmentally polluting. In areas with high environmental protection requirements, its use is restricted. Summary of the invention

[0005] Purpose of the utility model: In order to overcome the shortcomings of the background technology, the first purpose of the utility model is to disclose a parking air conditioning system, which combines the change of the power source, breaks through the limitations of the air conditioning system itself, and adopts a variety of control schemes in the main engine-driven air conditioning system to achieve normal operation of the air conditioning when the whole machine is working and when the vehicle is parked, and the air conditioning performance is stable, and the use is energy-saving and environmentally friendly;

[0006] The second purpose is to disclose a crane including the above-mentioned air conditioning system, which can be used together with the original air conditioning system and can be used when parking or using high voltage electricity to perform cooling and heating functions.

[0007] Technical solution: The parking air conditioning system disclosed in the utility model includes a refrigeration system and a heating system;

[0008] The refrigeration system includes a main engine and an auxiliary engine respectively connected to the oil tank, the main engine and the auxiliary engine are respectively connected to the condenser through compressor A and compressor B, and are sequentially connected to the liquid receiver and the evaporator, and are respectively connected to the condenser and the liquid receiver through a controller;

[0009] The heating system includes a low-temperature starting heater with a built-in water pump. The water outlet pipe of the water pump is connected to the air-conditioning heater water tank through an air-conditioning electric-controlled water valve, in which an evaporator is built in. The air-conditioning heater water tank has two parallel water outlets, one of which is connected to the engine water tank through a normally open electric-controlled water valve, and the engine water tank outlet pipe returns to the water pump of the low-temperature starting heater through the main engine; the other water outlet enters the PTC heater through a normally closed electric-controlled water valve, and the water outlet of the PTC heater is connected to the water pump of the low-temperature starting heater.

[0010] Furthermore, the auxiliary engine is also connected to a generator, which is connected to a battery through the generator, and the battery is reversely connected to the auxiliary engine through a starter.

[0011] Furthermore, a range-extending water pump is provided on the water outlet pipeline of the water pump.

[0012] Furthermore, the PTC heater has a built-in temperature switch.

[0013] A crane comprises the above-mentioned parking air conditioning system, wherein a plurality of control schemes are adopted in the main engine driven air conditioning system, and the air conditioning can work normally when the whole machine is working and when the crane is parked.

[0014] Beneficial effects: Compared with the prior art, the utility model:

[0015] (1) Compared with conventional air conditioners, the parking air conditioning system has an auxiliary engine, compressor B, and generator to realize the air conditioning refrigeration function. Other components use the original vehicle air conditioning system components to minimize the cost of component use;

[0016] (2) When the main engine is working, the main engine is used to drive the cooling; when the main engine is stopped, the auxiliary engine is used for cooling. This avoids the problem of no air conditioning available after the engine is turned off, causing the main engine to keep working, resulting in high fuel consumption, high environmental pollution, and high noise, thereby reducing the product fuel cost and environmental pollution;

[0017] (3) When the engine is idling for a short time, the parking air conditioner can be quickly switched to cooling, ensuring a stable cooling effect and improving the comfort of product use;

[0018] (4) The engine and the cold start device are driven together to effectively utilize the heat energy generated by the host engine for heating. At the same time, the heat source temperature and flow rate can be kept stable, which improves the comfort of air conditioning and improves environmental adaptability.

[0019] (5) When using high-voltage electric drive, the PTC module and the air-conditioning system can still work normally as an independent air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1This is a schematic diagram of the connection of the refrigeration system modules of the utility model;

[0021] Figure 2 This is a schematic diagram of the connection of the heating system modules of the utility model. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] A parking air conditioning system for cranes, by adding a parking air conditioning refrigeration module, can realize cooling by the main engine when the crawler crane is working, and the parking air conditioning drives the attached compressor to realize circulating cooling when the crawler crane is parked. Or when the main engine is idling, when the existing main engine-driven air conditioning refrigeration capacity is constrained and reduced, it can also be switched to turn on the parking air conditioning to achieve stable air conditioning refrigeration effect and comfortable operating environment; through the design of heat exchange pipelines and control circuits, the engine and PTC heater are connected in parallel, and then connected in series with the air conditioning system and low-temperature start heater device, so that the engine and PTC heater can heat separately under corresponding working conditions, and can heat together with the cold start device, and can switch freely through temperature and controller, so as to achieve stable air conditioning heating effect, parking availability, and energy saving effect.

[0024] The parking air conditioning system specifically includes a refrigeration system and a heating system.

[0025] like Figure 1 As shown, the refrigeration system includes a main engine and an auxiliary engine respectively connected to the oil tank, the main engine and the auxiliary engine are respectively connected to the condenser through compressor A and compressor B, and are sequentially connected to the liquid receiver and the evaporator, and are respectively connected to the condenser and the liquid receiver through a controller; the auxiliary engine is also connected to a generator, which is connected to a battery through the generator, and the battery is reversely connected to the auxiliary engine through a starter.

[0026] like Figure 2 As shown, the heating system includes a low-temperature start-up heater with a built-in water pump. The water outlet pipeline of the water pump is connected to the air-conditioning heater water tank through the air-conditioning electric control water valve, in which an evaporator is built in. The air-conditioning heater water tank has two parallel water outlets, one of which is connected to the engine water tank through the normally open electric control water valve. The engine water tank water outlet pipeline returns to the water pump of the low-temperature start-up heater through the main engine; the other enters the PTC heater through the normally closed electric control water valve, and the water outlet of the PTC heater is connected to the water pump of the low-temperature start-up heater. The water outlet pipeline of the water pump is provided with an extended-range water pump to meet the requirements of the thermal cycle flow rate, and the PTC heater has a built-in temperature switch.

[0027] The specific heating working principle is as follows:

[0028] Main engine operation

[0029] Before the main engine is started, the low-temperature start-up heater is turned on, the air conditioner electric control water valve is opened, the normally open electric control water valve is opened, and the normally closed electric control water valve is closed. Hot water circulates through the main engine-low-temperature start-up heater-air conditioner warm air water tank. Heating can be achieved by turning on the air volume switch of the air conditioner or turning on the air volume switch and heating switch at the same time. (Heating with low-temperature start-up heater)

[0030] When the circulating water does not reach the specified temperature after the main engine is started, and the low-temperature start heater is turned on, the air conditioner turns on the air volume switch or turns on the air volume switch and the heating switch at the same time to achieve heating. (The main engine and the heater provide heating at the same time)

[0031] After the main engine is started and the circulating water reaches the preset temperature, the low-temperature start heater is turned off, the air volume switch and heating switch of the air conditioner are turned on, and the water pump of the low-temperature start heater still works to provide heating. (The main engine provides heating, the low-temperature start heater stops heating, and the water pump of the low-temperature start heater is used as an extended-range water pump)

[0032] PTC Heater Operation

[0033] After the motor is started, the PTC heater is energized, the air volume switch and heating switch of the air conditioner are turned on, the PTC heater, the range-extending water pump and three electrically controlled water valves work, and the PTC heating works to realize heating.

Claims

1. A parking air conditioning system, characterized in that: Including cooling system and heating system; The refrigeration system includes a main engine and an auxiliary engine respectively connected to the oil tank, the main engine and the auxiliary engine are respectively connected to the condenser through compressor A and compressor B, and are sequentially connected to the liquid receiver and the evaporator, and are respectively connected to the condenser and the liquid receiver through a controller; The heating system includes a low-temperature starting heater with a built-in water pump. The water outlet pipe of the water pump is connected to the air-conditioning heater water tank through an air-conditioning electric-controlled water valve, in which an evaporator is built in. The air-conditioning heater water tank has two parallel water outlets, one of which is connected to the engine water tank through a normally open electric-controlled water valve, and the engine water tank outlet pipe returns to the water pump of the low-temperature starting heater through the main engine; the other water outlet enters the PTC heater through a normally closed electric-controlled water valve, and the water outlet of the PTC heater is connected to the water pump of the low-temperature starting heater.

2. The parking air conditioning system according to claim 1, characterized in that: The auxiliary engine is also connected to a generator, which is connected to a battery through the generator, and the battery is reversely connected to the auxiliary engine through a starter.

3. The parking air conditioning system according to claim 1, characterized in that: A range-extending water pump is arranged on the water outlet pipeline of the water pump.

4. The parking air conditioning system according to claim 1, characterized in that: The PTC heater has a built-in temperature switch.

5. A crane comprising the parking air conditioning system according to claim 1.

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