CN111351143A - An integral room air conditioner - Google Patents

Abstract

The invention discloses an integral room air conditioner, which consists of a box-shaped shell, a ventilation heat recovery part and a heat pump system, wherein a middle partition plate divides the interior of the shell into two indoor and outdoor spaces which are independent relatively, the ventilation heat recovery part arranged on the side surface of the middle partition plate is communicated with the indoor and outdoor sides, an outdoor heat exchanger and a fan of the heat pump system are arranged in the outdoor space of the box, the indoor heat exchanger and the fan are arranged in the indoor space of the box, and a subcooler which takes summer condensed water, winter defrosting water or cold air as a cooling medium is arranged in the heat pump system.

Description

An integral room air conditioner

technical field

The invention mainly relates to the technical field of air conditioning equipment, in particular to an integral room air conditioner.

Background technique

At present, under the circumstance that environmental protection and energy saving policies and regulations are becoming more and more stringent, air-conditioning equipment must further improve the energy efficiency level, and gradually adopt low greenhouse effect potential (GWP) refrigerants such as R290, R32, R1234yf and R1234ze to replace the existing High GWP refrigerants such as R410A and R22, while the above low GWP refrigerants are flammable or weakly flammable. Since the 1990s, split air conditioners have replaced window air conditioners as the mainstream form of room air conditioners. However, there will be some refrigerant leakage when the split air conditioner is installed on site, and the possibility of refrigerant leakage during long-term use is very large, which makes the risk of using low-GWP refrigerants sharply increased. At the same time, the on-site workload is large and potential The leakage leads to high installation and maintenance costs; secondly, the long connection pipeline of the split type air conditioner not only increases the cost of consumables, but also increases the flow resistance of the refrigerant and reduces the energy efficiency ratio. In addition, the split type air conditioner does not need to be replaced. It is necessary to install ventilation equipment when using it, otherwise, the health level of the indoor air environment cannot be guaranteed. Therefore, no matter from the perspective of increasing the safety of low GWP refrigerants, or from the perspective of improving energy saving and health, convenience of use, and reducing costs, air conditioners need to return to the whole type, especially in the traditional window type. On the basis of air conditioners, a new generation of integral air conditioners is developed. Patent 201910953263.7 discloses a multi-circuit heat pump type ventilation heat recovery and air treatment compound integrated unit, which is based on the multi-circuit heat pump system, and organically integrates functions such as heat pump type ventilation heat recovery and heat pump type air conditioning into the multi-circuit heat pump system. , give full play to the advantages of the heat pump being clean, efficient and compact, and can combine a variety of different air treatment functions and operating modes. Combined with the air conditioning and fresh air ventilation in the room, an integrated structure can also be achieved, but this structure Compactness, cost, and performance in extreme climatic conditions are still far from the requirements of room air conditioners; therefore, whether from increasing the safety of low-GWP refrigerants, or improving energy efficiency and health, From multiple perspectives, such as convenience of use and cost reduction, air conditioners need to return to the integral type, and it is especially necessary to develop a new generation of integral air conditioners on the basis of traditional window air conditioners.

SUMMARY OF THE INVENTION

The purpose of the present invention is to, based on the traditional window air conditioner, adopt the principle of two-stage compression heat pump to design a design that makes full use of summer condensed water and winter defrosted water or cold air to improve the performance of the air conditioner, has the function of ventilation heat recovery, especially The new generation of integral room air conditioners suitable for low GWP refrigerants can provide users with a safe and reliable compact air conditioner that conforms to modern concepts such as environmental protection, energy saving and health.

In order to achieve the above purpose of the invention, the technical solution of the present invention is an integrated room air conditioner, characterized in that: the air conditioner is composed of a box-shaped casing (19), a ventilation heat recovery component (22) and a heat pump system; A middle partition plate (26) is arranged in the middle part of the box-shaped shell (19), which divides the inside of the shell into two relatively independent spaces: the air outlet (20) and the fresh air inlet (27) communicate with the outdoor air through the C1 air outlet (20). The outdoor side space is connected with the indoor side space through the C2 air outlet (25) and the return air outlet located below it; The inlet (27), the heat recovery part (22) the fresh air side flow channel and the fresh air outlet (23) enter the indoor side, and the indoor air passes through the exhaust air inlet (24), the exhaust side flow channel and the exhaust air outlet of the heat recovery part (22) (21) Enter the outdoor side; the outdoor heat exchanger (3) and the outdoor fan (18) of the heat pump system are placed between the C1 air outlet (20) and the fresh air inlet (27), and the indoor heat exchanger (13) and the indoor fan (16) is placed between the C2 air outlet (25) and the air return outlet below it, and the motor (17) is connected to the indoor fan (16) and the outdoor fan (18).

The heat pump system is a quasi-two-stage compression or two-stage compression heat pump system. ) The middle port on the other side is connected to the suction port of the compressor (1), the left port on the other side of the four-way reversing valve (2) is connected to the indoor heat exchanger (13), and the four-way reversing valve (2) is another The right port on one side is connected to the outdoor heat exchanger (3); the other end of the outdoor heat exchanger (3) is connected to the throttling element A (7) through the check valve A1 (4) and the subcooler A (5). The direction valve A2 (6) is connected in parallel between the inlet of the check valve A1 (4) and the outlet of the subcooler A (5); the other end of the throttle element A (7) is connected to the lower part of the flasher (8), the flash The other port at the lower part of the generator (8) is connected with the throttle element B (9), and the upper port of the flasher (8) is connected with the air supply port of the compressor (1) through the solenoid valve (14); the throttle element B ( 9) The other end is connected to the other end of the indoor heat exchanger (13) through the one-way valve B1 (10) and the subcooler B (12), and the one-way valve B2 (11) is connected in parallel to the inlet and the Between the outlets of the subcooler B (12); the various components of the heat pump are connected through a pipeline (15).

The heat pump system of the air conditioner can be a single-stage compression system or a multi-circuit single-stage compression composite system.

The subcooler B (12) of the heat pump system of the air conditioner can be placed in the outdoor side space inside the casing (19), or can be placed in the indoor side space inside the casing (19), or can be omitted.

The subcooler A (5) and the subcooler B (12) of the air conditioner heat pump system may be two independent devices, or may be combined into one.

The subcooler A (5) of the heat pump system of the air conditioner should be attached to the inner bottom surface of the casing (19), or be integrated with the inner bottom surface of the casing (19); the subcooler B (12) can be attached to the inner bottom surface of the casing (19). 19) The inner bottom surface can also be installed near the fresh air inlet (27).

The flasher (8) of the air conditioner heat pump system may be a subcooler or other types of economizers.

The fan of the air conditioner drives the motor (17), which can be a motor with dual output shafts or two independent motors.

The fan of the air conditioner drives the motor (17), which can be a motor with dual output shafts or two independent motors.

The ventilation heat recovery device of the air conditioner can be a sensible heat recovery device such as a metal plate type and a heat pipe type, a polymer membrane type, a wheel type total heat recovery device, a heat pump type, a single-channel heat storage type, etc. Heat recovery equipment can also be omitted.

The outdoor heat exchanger of the heat pump system of the air conditioner is installed close to the inside of the outdoor side air outlet, or installed on the side of the box near the fresh air inlet.

The middle partition plate (26) of the box-shaped casing (19) of the air conditioner is a single flat plate, or a pair of flat plates separated by a certain distance, and the cavity between the pair of flat plates has one or more openings toward the outside.

The throttling element of the heat pump system of the air conditioner can be a small-hole throttle or a capillary tube, or an electric expansion valve or a thermal expansion valve.

The heat pump working fluid is environmental friendly working fluid such as R290, R32, R1234yf, R1234ze, or a mixture of several working fluids.

The integrated room air conditioner designed by the invention adopts a quasi-two-stage compression or two-stage compression heat pump system, so that the stability and energy efficiency level of its operation under extreme weather conditions can be effectively improved; It can make full use of the condensed water in summer and the defrosted water or cold air in winter to improve the performance of the air conditioner; the ventilation heat recovery device is integrated into it, the ventilation volume is guaranteed, the ventilation energy consumption is effectively reduced, and the heat recovery device is connected to the indoor side Even if the refrigerant leaks, it can quickly diffuse to the outdoors, greatly reducing the potential risk of using flammable refrigerants. The present invention provides a safe and reliable compact air conditioner that conforms to modern concepts such as environmental protection, energy saving and health, and is especially suitable for using low GWP refrigerants.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic structural diagram of Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of Embodiment 2 of the present invention.

FIG. 3 is a schematic structural diagram of Embodiment 3 of the present invention.

FIG. 4 is a schematic structural diagram of Embodiment 4 of the present invention.

FIG. 5 is a schematic structural diagram of Embodiment 5 of the present invention.

FIG. 6 is a schematic structural diagram of Embodiment 6 of the present invention.

Description of the labels in the figure:

1—compressor, 2—four-way reversing valve, 3—outdoor heat exchanger, 4—check valve A1, 5—subcooler A, 6—check valve A2, 7—throttle element A, 8— Liquid reservoir, 9—throttle element B, 10—check valve B1, 11—check valve B2, 12—subcooler B, 13—indoor heat exchanger, 14—solenoid valve, 15—pipeline, 16 —Indoor fan, 17—Motor, 18—Outdoor fan, 19—Housing, 20—C1 air outlet, 21—Exhaust air outlet, 22—Ventilation heat recovery part, 23—Fresh air outlet, 24—Exhaust air inlet, 25 —C2 air outlet, 26—intermediate partition, 27—fresh air inlet, 28—three-way valve.

Detailed ways

Example 1

Referring to FIG. 1 , this embodiment is an integrated room air conditioner suitable for using flammable refrigerants such as R290. It consists of a box-shaped shell (19), a ventilation heat recovery part (22) and a heat pump system, and a middle partition plate (26) is arranged in the middle part of the box-shaped shell (19) to separate the inside of the shell into two parts Relatively independent space: the outdoor side space communicated with the outdoor air through the C1 air outlet (20) and the fresh air inlet (27), and the indoor side space communicated with the indoor air through the C2 air outlet (25) and the return air outlet located below it; The compact plate type ventilation heat recovery device (22) is placed on the side of the middle partition plate (26), and the outdoor air enters the indoor side through the fresh air inlet (27), the fresh air side flow channel and the fresh air outlet (23) of the heat recovery device (22) , the indoor air enters the outdoor side through the exhaust air inlet (24), the exhaust side flow channel and the exhaust air outlet (21) of the heat recovery device (22); the outdoor heat exchanger (3) and the outdoor fan (18) of the heat pump system are installed Between the C1 air outlet (20) and the fresh air inlet (27), the indoor heat exchanger (13) and the indoor fan (16) are placed between the C2 air outlet (25) and the return air outlet below it, and the motor (17) is connected to the The indoor fan (16) is connected with the outdoor fan (18).

The heat pump system is a quasi-two-stage compression or two-stage compression heat pump system. ) The middle port on the other side is connected to the suction port of the compressor (1), the left port on the other side of the four-way reversing valve (2) is connected to the indoor heat exchanger (13), and the four-way reversing valve (2) is another The right port on one side is connected to the outdoor heat exchanger (3); the other end of the outdoor heat exchanger (3) is connected to the throttling element A (7) through the check valve A1 (4) and the subcooler A (5). The direction valve A2 (6) is connected in parallel between the inlet of the one-way valve A1 (4) and the outlet of the subcooler A (5); the other end of the throttling element A (7) is connected to an interface at the lower part of the bidirectional flasher (8), The other port at the lower part of the flasher (8) is connected with the throttle element B (9), and the upper port of the flasher (8) is connected with the air supply port of the compressor (1) through the solenoid valve (14); the throttle element B (9) The other end is connected to the other end of the indoor heat exchanger (13) through the check valve B1 (10) and the subcooler B (12), and the check valve B2 (11) is connected in parallel to the inlet of the check valve B1 (10). Between the outlet of the subcooler B (12); the components of the heat pump are connected through the pipeline (15). The subcooler A (5) and the subcooler B (12) should be installed against the inner bottom surface of the shell (19), or integrated with the inner bottom surface of the shell (19).

When the air conditioner operates in the cooling mode, the exhaust gas of the compressor (1) flows through the outdoor heat exchanger (3) through the four-way reversing valve (2), and the heat is released to the outdoor air and then condensed into a working fluid liquid, and the liquid passes through the single valve. When it goes to valve A1(4) and subcooler A(5), it will be further subcooled. The cooling fluid of subcooler A(5) is the condensed water flowing from the indoor heat exchanger (13); the subcooled liquid is throttled. Element A (7) enters the two-way flasher (8) after throttling and depressurization. In the flasher (8), the upper working medium gas flows into the supplementary gas supply of the compressor (1) through the gas supply pipeline with the solenoid valve (14). The lower working fluid flows through the throttling element B (9) through the other interface, and the working fluid after throttling and depressurization again enters the indoor heat exchanger (13) through the check valve B2 (11), absorbing the indoor air. After the heat, it becomes the working gas, and then it is sucked by the compressor through the four-way reversing valve (2). The condensed water condensed after the air flows through the indoor heat exchanger (13) to cool down is led to the subcooler A (5).

When the air conditioner operates in the heating mode, the exhaust gas of the compressor (1) flows through the indoor heat exchanger (13) through the four-way reversing valve (2), and the heat is released to the indoor air and then condensed into a working fluid liquid. Subcooler B (12) and one-way valve B1 (10) are further subcooled. The cooling fluid of subcooler B (12) is the defrost water flowing from the outdoor heat exchanger (3), and the defrost water is vaporized Afterwards, the indoor air can be humidified; the supercooled liquid is throttled and depressurized by the throttling element B (9) and then enters the two-way flasher (8), and the working medium gas in the upper part of the flasher (8) passes through the solenoid valve (14). ) of the air supply pipeline flows into the air supply port of the compressor (1), while the lower working fluid flows through the throttling element A (7) through another interface, and the throttling and depressurized working fluid passes through the check valve A2 (6) It enters the outdoor heat exchanger (3), absorbs the heat of the outdoor air and becomes the working gas, and then is sucked by the compressor through the four-way reversing valve (2). After the air flows through the outdoor heat exchanger (3) to cool down, part of the water vapor condenses and freezes on the outer surface of the outdoor heat exchanger (3). When the frost layer reaches a certain thickness, the heat pump starts to defrost and operates in the cooling mode. The low temperature water is led to subcooler B (12).

Embodiment 2

Referring to FIG. 2 , this embodiment is an integrated room air conditioner with heating and no humidifying function in winter. Compared with the first embodiment, only the one-way valve B1 (10), the one-way valve B2 (11), and the subcooler B (12) are moved from the indoor side space of the box (19) to the outdoor side space, but they are The pipeline connections between them remain unchanged. When heating in winter, the cooling fluid of subcooler B (12) is defrost water or/and outdoor air. The rest is the same as the first embodiment.

Embodiment 3

Referring to FIG. 3 , this embodiment is an integral room air conditioner with no working fluid subcooling function for heating in winter. Compared with the first embodiment, the one-way valve B1 (10), the subcooler B (12) and its pipeline, and the one-way valve B2 (11) are all omitted. When heating in winter, the working fluid liquid from the indoor heat exchanger (13) is no longer supercooled by special devices, and directly enters the throttling element B (9). The cooling fluid of subcooler B (12) is defrost water or/and outdoor air. The rest is the same as the first embodiment.

Embodiment 4

Referring to FIG. 4 , this embodiment is a single-stage compression integrated room air conditioner with heating and no humidifying function in winter. Compared with the second embodiment, the air supply pipeline with the solenoid valve (14) with the air supply port of the compressor (8) and the compressor air supply port on the upper part is omitted, and the compressor has no air supply port for the heat pump compressor; throttling element B (9) ) to the pipeline where the check valve B1 (10) and the subcooler B (12) are located. After the pipeline is connected in parallel with the pipeline where the check valve B2 (11) is located, one end is connected to the throttling element A (7). , and the other end is connected to the indoor heat exchanger (13). The rest is the same as the second embodiment.

Embodiment 5

Referring to Fig. 5, this embodiment is an integrated room air conditioner in which a subcooler A (5) and a subcooler B (12) are combined into one. Compared with the first embodiment, a three-way valve (28) is added to the pipeline after the subcooler A (5), the three-way valve (28), an outlet throttling element A (7) and a one-way valve A2 (6) The other outlet is connected to the pipeline between the throttling element B (9) and the one-way valve B2 (11); the other end of the one-way valve B2 (11) passes through the one-way valve B1 (10) Connect to the pipeline between subcooler A(5) and check valve A1(4). In this way, the working fluids from the outdoor heat exchanger (3) in the cooling mode and from the indoor heat exchanger (13) in the heating mode are both supercooled by the cooler A (5). The rest is the same as the first embodiment.

Embodiment 6

Referring to Fig. 6, this embodiment is an integrated room air conditioner with an outdoor heat exchanger (3) on the side. Compared with the first embodiment, the outdoor heat exchanger (3) is divided into two pieces, which are respectively placed on both sides of the box body (19) near the fresh air inlet (27), and the right interface on the other side of the four-way reversing valve (2). It is connected to one end of the two outdoor heat exchangers through pipelines, and after the other ends of the two outdoor heat exchangers are combined, it is connected to the throttling element A (7) through the check valve A1 (4) and the subcooler A (5). connect. In this way, the outdoor air is sucked through the outdoor heat exchanger (3), which can improve the heat exchange effect on the air side of the heat exchanger. The rest is the same as the first embodiment.

Claims (10)

1. An integral room air conditioner characterized by: the air conditioner consists of a box-shaped shell (19), a ventilation heat recovery part (22) and a heat pump system; a middle partition plate (26) is arranged in the middle of the interior of the box-type shell (19), the interior of the box-type shell (19) is divided into two relatively independent spaces, and the two spaces are provided with a C1 air outlet (20), an exhaust air outlet (21), a fresh air outlet (23), an exhaust air inlet (24), a C2 air outlet (25) and a fresh air inlet (27); the ventilation heat recovery component (22) is arranged on the side surface of the middle partition plate (26); an outdoor heat exchanger (3) and an outdoor fan (18) of the heat pump system are arranged between a C1 air outlet (20) and a fresh air inlet (27), an indoor heat exchanger (13) and an indoor fan (16) are arranged between a C2 air outlet (25) and a return air inlet below the C2 air outlet, and a motor (17) is connected with the indoor fan (16) and the outdoor fan (18); the heat pump system is a quasi-second-stage compression or second-stage compression heat pump system;

in the heat pump system, a single interface at one side of a four-way reversing valve (2) is connected with an exhaust port of a compressor (1), a middle interface at the other side of the four-way reversing valve (2) is connected with an air suction port of the compressor (1), a left interface at the other side of the four-way reversing valve (2) is connected with an indoor heat exchanger (13), and a right interface at the other side of the four-way reversing valve (2) is connected with an outdoor heat exchanger (3); the other end of the outdoor heat exchanger (3) is connected with a throttling element A (7) through a one-way valve A1(4) and a subcooler A (5), and a one-way valve A2(6) is connected between an inlet of the one-way valve A1(4) and an outlet of the subcooler A (5) in parallel; the other end of the throttling element A (7) is connected with a port at the lower part of the flash tank (8), the other port at the lower part of the flash tank (8) is connected with the throttling element B (9), and the port at the upper part of the flash tank (8) is connected with an air supplementing port of the compressor (1) through an electromagnetic valve (14); the other end of the throttling element B (9) is connected with the other end of the indoor heat exchanger (13) through a one-way valve B1(10) and a subcooler B (12), and a one-way valve B2(11) is connected between an inlet of the one-way valve B1(10) and an outlet of the subcooler B (12) in parallel; the components of the heat pump are connected by a pipeline (15).

2. A unitary room air conditioner as defined in claim 1 wherein: the heat pump system is a single-stage compression system or a multi-loop single-stage compression composite system.

3. A unitary room air conditioner as defined in claim 1 wherein: the subcooler B (12) of the air conditioner heat pump system is arranged in the outdoor space inside the shell (19), or in the indoor space inside the shell (19), or is directly omitted.

4. A unitary room air conditioner as defined in claim 1 wherein: the subcooler A (5) and subcooler B (12) of the heat pump system are two separate pieces, or are of an integral construction.

5. A unitary room air conditioner as defined in claim 1 wherein: the subcooler A (5) of the heat pump system is installed along the inner bottom surface of the shell (19) or is combined with the inner bottom surface of the shell (19) into a whole; the subcooler B (12) is arranged close to the inner bottom surface of the shell (19) or near the fresh air inlet (27).

6. A unitary room air conditioner as defined in claim 1 wherein: the flash evaporator (8) of the heat pump system is a subcooler.

7. A unitary room air conditioner as defined in claim 1 wherein: the motor of the fan driving motor (17) is a motor with double output shafts or two independent motors.

8. A unitary room air conditioner as defined in claim 1 wherein: the air exchange heat recoverer is a metal plate type or heat pipe type sensible heat recovery device, or a high polymer film type or rotary wheel type total heat recovery device, or a heat pump type or single-channel heat accumulating type heat recovery device, and can also be omitted.

9. A unitary room air conditioner as defined in claim 1 wherein: the outdoor heat exchanger of the heat pump system is arranged close to the inner side of the outdoor air outlet or arranged on the side surface of the box body near the fresh air inlet.

10. A unitary room air conditioner as defined in claim 1 wherein: the intermediate partition (26) of the box-shaped casing (19) is a single plate or a pair of plates spaced apart from each other, the cavity between the plates being open to the outside.

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