Integrated air duct type variable-frequency electric air conditioning system for engineering machinery

Abstract

The invention discloses an integrated air duct type variable-frequency electric air conditioning system for engineering machinery. The integrated air duct type variable-frequency electric air conditioning system comprises an integrated air duct type inner machine arranged in a control room, an outer machine arranged on the outer side of the control room, an outer machine electricity shortage protection device matched with the outer machine, a storage battery and a hot water circulation system. The outdoor unit, the hot water circulating system and the storage battery are respectively adaptively connected with the integrated air duct type indoor unit in the control room; by optimizing the internal unit of the electric air conditioner and increasing the power shortage protection of the frequency converter, the reliability of the air conditioner system is greatly improved, and the application field is expanded. Through the brand new design of the indoor unit, the integrated design of engine hot water heating and electric compressor refrigeration is achieved. And through integration of the outdoor unit and the household air conditioner, frequency conversion control application can be easily achieved, the use comfort of the air conditioner is improved, and meanwhile the application cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery air conditioning, and in particular to an integrated duct type variable frequency electric air conditioning system for engineering machinery. Background Art

[0002] There are two common types of electric air conditioners for vehicles. One type is connected to a high-voltage power supply and is used in electric engineering machinery, mainly equipped with a high-voltage battery pack. A separate heat circulation system is required for heating, which is relatively expensive. The other type is a 24V battery-driven air conditioner commonly used in heavy-duty trucks. It is divided into an indoor unit and an outdoor unit. The indoor unit is assembled in a similar way to a household electric air conditioner, which occupies a large space in the control room and blocks the line of sight, posing a safety hazard. The outdoor unit often uses a battery to provide a power source, but this affects the battery life and battery power, increases the cost of use, and the system power failure poses a safety hazard. Summary of the invention

[0003] In view of the above technical deficiencies, the purpose of the present invention is to provide an integrated duct type variable frequency electric air conditioning system for engineering machinery, which can meet the needs of engineering machinery with engine as power source for electric air conditioning cooling and heating, reduce product costs, and extend battery life. At the same time, the improvement of the internal unit design solves the problem of internal unit layout.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides an integrated duct type variable frequency electric air conditioning system for engineering machinery, comprising an integrated duct type indoor unit arranged in a control room, an outdoor unit arranged outside the control room, an outdoor unit power failure protection device adapted to the outdoor unit, a battery and a hot water circulation system; the outdoor unit, the hot water circulation system and the battery are adapted to be connected to the integrated duct type indoor unit in the control room respectively;

[0006] When the air conditioner is in use, the cooling and compressor power adjustment are achieved through the outdoor unit, and the heating is achieved through the hot water circulation system; use the temperature adjustment board adapted to the integrated duct type indoor unit to turn on the air conditioner in the control room to make it work, and use the duct switch in the control room to achieve air outlet, and the cold and hot air are transported to the predetermined air outlet in the control room through the integrated duct type indoor unit. During the operation of the air conditioner, the outdoor unit's power failure protection device limits the operation of the air conditioner according to the power consumption. When the system is under power, the air conditioner suspends operation.

[0007] Preferably, the storage battery is arranged on a product host platform outside the control room.

[0008] Preferably, the hot water circulation system uses an engine outside the control room of the engineering machinery vehicle, and the hot water in the engine is connected to the evaporator core of the integrated duct type indoor unit through a water pipe to achieve air conditioning heating.

[0009] Preferably, the external unit includes a compressor and a frequency conversion controller.

[0010] Preferably, the air duct switch is mounted on the interior cover of the control room and is electrically connected to the integrated air duct type internal machine to control the air output of the evaporator.

[0011] The external unit power-loss protection device is a battery power-loss protector integrated in the external unit housing. It has the function of detecting the battery power to prevent the vehicle from idling for too long and the air conditioner from using electricity for a long time, causing the battery to lose power, thereby affecting the safety of the whole machine lifting operation.

[0012] The beneficial effects of the present invention are:

[0013] 1) The present invention expands the application field of 24V electric air conditioners: by optimizing the indoor unit of the electric air conditioner and adding inverter power failure protection, the reliability of such air conditioning systems is greatly improved and the application field is expanded.

[0014] 2) The present invention realizes the integration of 24V electric air conditioning refrigeration and hot water heating: through the new design of the internal unit, the integrated design of engine hot water heating and electric compressor refrigeration is realized, thereby reducing the system cost.

[0015] 3) The present invention improves the comfort of air conditioning and reduces the application cost of air conditioning: through the integration of the outdoor unit and the household air conditioner, the frequency conversion control application can be easily realized, which improves the comfort of air conditioning use and greatly reduces the application cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic structural diagram of an integrated duct type variable frequency electric air conditioning system for engineering machinery provided in an embodiment of the present invention.

[0018] Description of reference numerals:

[0019] 1. Integrated duct type indoor unit; 2. Temperature adjustment panel; 3. Duct switch; 4. Outdoor unit power failure protection device; 5. Outdoor unit; 6. Hot water circulation system; 7. Battery. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1 As shown, the integrated duct type variable frequency electric air conditioning system for engineering machinery comprises an integrated duct type indoor unit 1 arranged in the control room, an outdoor unit 5 arranged outside the control room, an outdoor unit power failure protection device 4 adapted to the outdoor unit 5, a battery 7 and a hot water circulation system 6; the outdoor unit 5, the hot water circulation system 6 and the battery 7 are adapted to be connected to the integrated duct type indoor unit 1 in the control room respectively;

[0022] When the air conditioner is in use, the cooling and compressor power adjustment are achieved through the outdoor unit 5, and the heating is achieved through the hot water circulation system 6; the air conditioner is turned on in the control room by using the temperature adjustment plate 2 adapted to the integrated duct type indoor unit 1 to make it work, and the air outlet is achieved through the duct switch 3 in the control room, and the cold and hot air are transported to the predetermined air outlet in the control room through the integrated duct type indoor unit 1. During the operation of the air conditioner, the outdoor unit power failure protection device 4 limits the operation of the air conditioner according to the power consumption. When the system is power-deficient, the air conditioner suspends operation.

[0023] The external unit power-loss protection device 4 is a battery power-loss protector integrated in the external unit housing, which has the function of detecting the battery power to prevent the vehicle from idling for too long and the air conditioner from using electricity for a long time, causing the battery to lose power, thereby affecting the safety of the whole machine lifting operation.

[0024] Preferably, the storage battery 7 is arranged on the product host platform outside the control room.

[0025] Preferably, the hot water circulation system 6 uses an engine outside the control room of the engineering machinery vehicle, and the hot water in the engine is connected to the evaporator core of the integrated duct type indoor unit 1 through a water pipe to achieve air conditioning and heating.

[0026] Preferably, the external unit 5 includes a compressor and a frequency conversion controller.

[0027] Preferably, the air duct switch 3 is installed on the interior cover of the control room and is electrically connected to the integrated air duct type indoor unit 1 to control the air outlet of the evaporator.

[0028] The air conditioner indoor unit of the present invention solves the layout problem of the conventional 24V air conditioner indoor unit through the integrated air duct indoor unit design. The indoor unit still adopts the traditional vehicle air conditioner indoor unit structure, and the air outlet of the indoor unit still passes through the preset air duct and air outlet in the control room.

[0029] The air-conditioning refrigeration of the present invention is achieved through an electrically driven compressor reserved for an external unit. On the one hand, the frequency conversion control technology is adopted to realize low-speed operation of the compressor, thereby saving power consumption and meeting the demand for using the parking air conditioner in a non-started state for a long time; on the other hand, by adding a low-power protection device, the problem of insufficient system power supply when the vehicle is operating is avoided.

[0030] The heating of the present invention is achieved by circulating the hot water from the engine to the evaporation core of the internal machine, which reduces the need to add an additional heating device for heating the electric air conditioner of the engineering vehicle and saves the use cost.

[0031] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An integrated duct type variable frequency electric air conditioner for engineering machinery, characterized in that: The invention comprises an integrated duct type indoor unit (1) arranged in a control room, an outdoor unit (5) arranged outside the control room, an outdoor unit power failure protection device (4) adapted to the outdoor unit (5), a storage battery (7) and a hot water circulation system (6); the outdoor unit (5), the hot water circulation system (6) and the storage battery (7) are adapted to be connected to the integrated duct type indoor unit (1) in the control room respectively; When the air conditioner is in use, the cooling and compressor power adjustment are realized through the outdoor unit (5), and the heating is realized through the hot water circulation system (6); the air conditioner is turned on in the control room by using the temperature adjustment plate (2) adapted to the integrated duct type indoor unit (1) to make it work, and the air outlet is realized by the air duct switch (3) in the control room, and the cold and hot air are transported to the predetermined air outlet of the control room through the integrated duct type indoor unit (1). During the operation of the air conditioner, the outdoor unit power failure protection device (4) limits the operation of the air conditioner according to the power consumption situation. When the system is power-deficient, the air conditioner stops operating.

2. The integrated duct type variable frequency electric air conditioning system for engineering machinery according to claim 1, characterized in that: The storage battery (7) is arranged on the product host platform outside the control room.

3. The integrated duct type variable frequency electric air conditioning system for engineering machinery according to claim 1, characterized in that: The hot water circulation system (6) uses an engine outside the control room of the engineering machinery vehicle, and the hot water in the engine is connected to the evaporator core of the integrated duct type indoor unit (1) through a water pipe to achieve air conditioning heating.

4. The integrated duct type variable frequency electric air conditioning system for engineering machinery according to claim 1, characterized in that: The external machine (5) comprises a compressor and a frequency conversion controller.

5. The integrated duct type variable frequency electric air conditioning system for engineering machinery according to claim 1, characterized in that: The air duct switch (3) is installed on the interior cover plate of the control room and is electrically connected to the integrated air duct type indoor unit (1) to control the air discharge of the evaporator.

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