WO2020073646A1 - Condenser and air conditioning system - Google Patents

Abstract

A condenser and an air conditioning system, wherein the air conditioning system is able to normally operate under a condition that the outdoor environment temperature is low, and the costs are lowered. The condenser comprises a housing (10), a condenser coil (20), a fan (30), and an air valve (40). The housing (10) is provided with a first side and a second side which are opposite to each other, and the first side and the second side are respectively provided with an air inlet (11) and an air outlet (12); the condenser coil (20), the fan (30), and the air valve (40) are provided between the air inlet (11) and the air outlet (12) in parallel, the condenser coil (20) is provided close to the air inlet (11), and the air valve (40) is provided close to the air outlet (12); the opening degree of the air valve (40) is adjustable.

Description

A condenser and an air-conditioning system

This application requires the priority of the Chinese patent application filed on October 10, 2018 in the China Patent Office with the application number 201811179948.2 and the invention titled "A condenser and an air-conditioning system". Applying.

Technical field

The invention relates to the technical field of refrigeration equipment, in particular to a condenser and an air conditioning system.

Background technique

The condenser will be affected by the outdoor natural wind when it is working. If the outdoor environment temperature is low, the condenser will be severely radiated under the action of the outdoor cold wind, which will cause the compressor discharge pressure to be too low. If it exceeds the normal operation of the air conditioning system The range will affect the service life of the system. For the application of the condenser in a low-temperature environment, it is a technical problem to be solved urgently in the field.

To solve the above problems, in the prior art, it is generally solved by adding an exhaust pressure control valve to the system circuit. As shown in FIG. 1, the air conditioning system includes a compressor 01, a condenser 02, a throttle element 03, an evaporator 04, an exhaust pressure control valve 05, and a liquid storage tank 06, and the exhaust pressure control valve 05 includes a first air inlet a. The second air inlet b and the air outlet c; among them, the liquid storage tank 06, the throttle element 03, the evaporator 04 and the air inlet of the compressor 01 are connected in sequence, and the air outlet of the compressor 01 is respectively connected to the condenser The intake port of 02 is connected to the first intake port a of the exhaust pressure control valve 05, the outlet of the condenser 02 is connected to the second intake port b of the exhaust pressure control valve 05, and the exhaust pressure control valve 05 The gas outlet c is connected to the liquid storage tank 06. During system operation, when the compressor discharge pressure is insufficient, the second air inlet b of the discharge pressure control valve 05 is closed, and the refrigerant discharged from the compressor discharge 01 does not pass through the condenser 02, but passes through the discharge pressure control valve in turn. The first air inlet a and air outlet c of 05 enter the liquid storage tank 06 to reduce heat loss, thereby increasing the compressor discharge pressure; when the compressor discharge pressure is higher than the pressure set value of the discharge pressure control valve 05 At this time, the first air inlet a of the exhaust pressure control valve 05 is closed, the refrigerant discharged from the compressor 01 enters the condenser 02, and heat exchange is performed in the condenser 02, so that the compressor exhaust pressure no longer rises. The hot refrigerant passes through the second air inlet b and the air outlet c of the exhaust pressure control valve 05 into the liquid storage tank 06 in this order, and the exhaust pressure control valve 05 only serves as a passage at this time.

The above scheme requires the air conditioning system to add multiple components such as exhaust pressure control valve and liquid storage tank, which not only makes the cost of the system higher, but also introduces multiple hidden failure points such as exhaust pressure control valve and liquid storage tank. Affect the working reliability of the system.

Summary of the invention

The purpose of the embodiments of the present invention is to provide a condenser and an air conditioning system, so that the air conditioning system can operate normally when the outdoor ambient temperature is low, and at the same time reduce the cost.

An embodiment of the present invention provides a condenser, including a housing, a condenser coil, a fan, and an air valve, wherein: the housing has opposing first and second sides, and the first side and the The second side has an air inlet and an air outlet respectively; the condenser coil, fan and air valve are arranged in parallel between the air inlet and the air outlet, and the condenser coil is located close to the air inlet, The air valve is arranged near the air outlet; the opening of the air valve is adjustable.

In a specific embodiment, the damper includes a frame and a plurality of blades pivotally mounted on the frame, the pivotal axes of the plurality of blades are arranged horizontally and the pivotal axes of two adjacent blades The distance between them is not greater than the width of the blades, and a plurality of the blades can rotate under the wind drive of the wind turbine.

In a specific embodiment, the air valve is an electric air valve.

In a specific embodiment, the condenser further includes a pressure detection sensor for detecting the discharge pressure of the compressor, and a control chip connected to the pressure detection sensor and the electric air valve. The control chip includes:

A reading circuit for reading the compressor discharge pressure detected by the pressure detection sensor;

An identification circuit for identifying whether the compressor discharge pressure is within a preset target pressure range;

A drive circuit for driving the opening of the electric damper to decrease when the compressor discharge pressure is less than the lower limit of the target pressure range, and when the compressor discharge pressure is greater than the target At the upper limit of the pressure range, the opening of the electric damper is increased.

In a specific embodiment, the fan is located on the side of the wind valve facing the condenser coil; or, the fan is located on the side of the wind valve facing away from the condenser coil.

In a specific embodiment, the damper is located inside the casing, and the damper is an integral damper whose shape matches the cross-sectional shape of the casing; or, the number of dampers There are a plurality of the wind valves arranged in an array to form a wind valve assembly whose shape matches the cross-sectional shape of the housing.

In a specific embodiment, when the fan is located on the side of the air valve facing the condenser coil, the air valve is provided at the air outlet;

The air valve is an integral air valve whose shape matches the shape of the air outlet; or the number of the air valve is plural, and the plurality of air valves are arranged in an array to form the shape and the air outlet Match the shape of the air valve assembly.

In a specific embodiment, the number of the fan is one, and the fan is set corresponding to the integral damper; or, the fan is set corresponding to the damper assembly; or,

The number of the fans is plural, and the plural fans are arranged corresponding to the integral damper; or, the plural fans are arranged correspondingly to the plural dampers of the damper assembly.

In a specific embodiment, the shape of the air valve is rectangular, circular or polygonal.

In the embodiment of the present invention, an air valve with an adjustable opening is provided between the air inlet and the air outlet of the condenser shell. When the air conditioning system is operated under a low outdoor ambient temperature, the air valve is adjusted by adjusting the opening of the air valve Small or turn it off to reduce the air flow through the condenser coil, thereby reducing the heat dissipation of the condenser, and further increase the compressor discharge pressure, so as to ensure that the air conditioning system can work normally when the outdoor ambient temperature is low At the same time, compared with the prior art, this solution does not need to provide components such as exhaust pressure control valve and liquid storage tank, so it can also reduce the cost of the air conditioning system.

An embodiment of the present invention also provides an air conditioning system, including the condenser according to any one of the foregoing technical solutions. The air-conditioning system can be operated normally when the outdoor environment temperature is low, and the cost is low.

BRIEF DESCRIPTION

Figure 1 is a schematic structural diagram of a prior art air conditioning system;

2 is a schematic structural diagram of a condenser according to an embodiment of the present invention;

3 is a schematic structural diagram of a condenser according to another embodiment of the present invention;

4 is a schematic structural view of an air valve according to an embodiment of the invention;

5 is a schematic structural diagram of a damper according to another embodiment of the present invention;

6 is a schematic structural diagram of a damper according to another embodiment of the present invention;

7 is a schematic structural diagram of a condenser according to another embodiment of the present invention;

8 is a schematic structural diagram of a condenser according to another embodiment of the present invention;

9 is a schematic structural diagram of a condenser according to another embodiment of the present invention.

Reference mark:

Existing technology:

01-compressor 02-condenser 03-throttling element 04-evaporator

05-Exhaust pressure valve 06-Reservoir

Part of the embodiment of the invention:

10-shell 20-condenser coil 30-fan 40-air valve 11-air inlet

12-Air outlet 41-Frame 42-Blade 50-Air valve assembly 31-Fan bracket

detailed description

In order to enable the air conditioning system to operate normally when the outdoor ambient temperature is low, while reducing costs, embodiments of the present invention provide a condenser and an air conditioning system. To make the objectives, technical solutions, and advantages of the present invention clearer, the following examples are used to further illustrate the present invention.

As shown in FIG. 2, an embodiment of the present invention provides a condenser, including a housing 10, a condenser coil 20, a fan 30, and a damper 40, wherein: the housing 10 has first and second opposite sides , The first side and the second side have an air inlet 11 and an air outlet 12 respectively; the condenser coil 20, the fan 30 and the air valve 40 are arranged in parallel between the air inlet 11 and the air outlet 12, and the condenser coil 20 is close to the inlet The air outlet 11 is provided, and the air valve 40 is provided near the air outlet 12; the opening of the air valve 40 can be adjusted.

In the embodiment of the present invention, an air valve 40 with an adjustable opening degree is provided between the air inlet 11 and the air outlet 12 of the condenser housing 10. When the air conditioning system is operating under a low outdoor ambient temperature, the air valve The opening of 40 can be reduced or closed to reduce the amount of air flowing through the condenser coil 20, thereby reducing the heat dissipation of the condenser, and further increasing the compressor discharge pressure to ensure that the air conditioning system has a relatively low outdoor temperature It can operate normally under low conditions. At the same time, compared with the prior art, this solution does not need to provide components such as exhaust pressure control valve and liquid storage tank, so it can also reduce the cost of the air conditioning system.

In the process of implementing the present invention, the inventors separately tested the operating conditions of the air conditioner when the outdoor environment temperature is low in the case of the condenser without the air valve and the air valve. The test results show that, without an air valve, when the outdoor ambient temperature is 5 ° C, under the action of ambient wind, the compression ratio of the compressor is lower than the lower limit of the safe operating range of the compressor; while the air valve is provided Under the circumstances, when the outdoor ambient temperature is as low as -25 ℃, under the action of ambient wind, the compression ratio of the compressor is still higher than the lower limit of the safe operating range of the compressor, ensuring the safe operation of the air conditioning system.

The specific shape of the damper is not limited, for example, it can be rectangular, circular or polygonal. The specific type of the damper is not limited. Referring to FIGS. 2 and 4, in one embodiment of the present invention, the damper 40 includes a frame 41 and a plurality of blades 42 pivotally mounted on the frame 41. The installation axis is arranged in the horizontal direction and the spacing between the pivot axes of the two adjacent blades 42 is not greater than the width of the blade 42. The multiple blades 42 can rotate under the wind drive of the fan 30. In this embodiment, when the fan 30 is turned on, a plurality of blades 42 can be rotated to a state inclined relative to the frame 41 under the wind force of the fan 30, and a ventilation hole is formed between two adjacent blades 42. 40 is in the open state, it is understandable that when the speed of the fan 30 changes, the rotation angle of the blade 42 will also change accordingly, so by adjusting the speed of the fan 30, the opening degree of the air valve 40 can be adjusted, thereby changing the condenser When the fan 30 is turned off, the plurality of blades 42 can be rotated downward under the effect of its own gravity to close the ventilation hole, so that the air valve 40 is in a closed state.

As shown in FIG. 5, in another embodiment of the present invention, the damper 40 is an electric damper, so that the opening degree of the electric damper can be directly adjusted.

It should be noted that, in the foregoing two embodiments, the wind speed of the fan or the opening degree of the electric air valve can be controlled by the control chip. Taking an electric air valve as an example for description, in specific implementation, the condenser further includes a pressure detection sensor for detecting the discharge pressure of the compressor, and a control chip connected to the pressure detection sensor and the electric air valve. The control chip includes:

Reading circuit for reading the compressor discharge pressure detected by the pressure detection sensor;

Identification circuit, used to identify whether the compressor discharge pressure is within the preset target pressure range;

The driving circuit is used to drive the opening of the electric damper when the compressor discharge pressure is less than the lower limit of the target pressure range, and to drive the electric The opening of the damper increases.

With the solution of this embodiment, the condenser can automatically make a logical judgment according to the magnitude of the compressor discharge pressure to adjust the opening of the electric air valve, and the degree of intelligence is high. Understandably, when controlling the speed of the fan, similar to the above control logic, it is only necessary to reduce the speed of driving the fan when the compressor discharge pressure is less than the lower limit of the target pressure range, and when the compressor discharge pressure is greater than When the upper limit of the target pressure range is reached, the rotation speed of the drive fan may be increased.

In the embodiment of the present invention, the specific installation position of the fan is not limited, as shown in FIG. 2, it can be installed on the side of the air valve 40 facing the condenser coil 20, that is, on the condenser coil 20 and the air valve 40 In between, it may also be disposed on the side of the air valve 40 facing away from the condenser coil 20, as shown in the embodiment shown in FIG. 3. Regardless of whether the fan 30 is located at any of the above positions, the damper 40 can be passively opened by the wind drive of the fan 30, so that a wind flow channel is formed between the air inlet 11 and the air outlet 12 of the casing 10, and the outdoor air is suctioned by the fan It enters the casing 10 downward, flows through the condenser coil 20 and exchanges heat with it, and then is discharged by the air valve 40. As shown in FIG. 2, the fan 30 can be specifically disposed in the housing 10 through the fan bracket 31.

In an embodiment of the present invention, the air valve is located inside the housing. To ensure that the air valve can completely isolate the air inlet and air outlet of the condenser housing when the air valve is closed, preferably, the shape of the air valve is The cross-sectional shape needs to match. The number of dampers is not limited. In the above embodiment, the dampers may be integral dampers whose shape matches the cross-sectional shape of the housing; or, the number of dampers is multiple, and multiple dampers are arranged in an array The cloth constitutes a damper assembly whose shape matches the cross-sectional shape of the housing.

In another embodiment of the present invention, referring to FIG. 2, when the fan 30 is located on the side of the air valve 40 facing the condenser coil 20, the air valve 40 is disposed at the air outlet 12, similarly, in this implementation For example, the damper 40 may be an integral damper whose shape matches the shape of the air outlet 12; or, as shown in FIGS. 6 and 7, the number of dampers 40 is plural, and the plural dampers 40 are arrayed Arrange the air valve assembly 50 whose shape matches the shape of the air outlet.

The number of fans 30 is not limited, and may be one or more. When the number of fans 30 is one, the fans 30 are set correspondingly to the integral damper or to the damper assembly 50, as shown in FIGS. 2 and 7; when there are multiple fans 30, as shown in FIG. 8 As shown, a plurality of fans 30 may be provided corresponding to the integrated damper, or, as shown in FIG. 9, a plurality of fans 30 may also be provided corresponding to the plurality of dampers 40 of the damper assembly.

An embodiment of the present invention also provides an air conditioning system, including the condenser of any of the foregoing technical solutions. The air-conditioning system can be operated normally when the outdoor environment temperature is low, and the cost is low.

Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims (10)

1. A condenser, characterized in that it includes a housing, a condenser coil, a fan, and an air valve, wherein: the housing has opposing first and second sides, and the first side and the second side The side has an air inlet and an air outlet; the condenser coil, fan and air valve are arranged in parallel between the air inlet and the air outlet, and the condenser coil is located near the air inlet, the The air valve is arranged close to the air outlet; the opening of the air valve is adjustable.
2. The condenser according to claim 1, wherein the air valve includes a frame and a plurality of blades pivotally mounted on the frame, and the pivotal axes of the plurality of blades are arranged in a horizontal direction and two adjacent The spacing between the pivot axes of the two blades is not greater than the width of the blades, and a plurality of the blades can rotate under the wind power of the fan.
3. The condenser according to claim 1, wherein the damper is an electric damper.
4. The condenser according to claim 3, further comprising a pressure detection sensor for detecting the discharge pressure of the compressor, and a control chip connected to the pressure detection sensor and the electric air valve, the control The chip includes:

   A reading circuit for reading the compressor discharge pressure detected by the pressure detection sensor;

   An identification circuit for identifying whether the compressor discharge pressure is within a preset target pressure range;

   A drive circuit for driving the opening of the electric damper to decrease when the compressor discharge pressure is less than the lower limit of the target pressure range, and when the compressor discharge pressure is greater than the target At the upper limit of the pressure range, the opening of the electric damper is increased.
5. The condenser according to claim 1, wherein the fan is located on a side of the wind valve facing the condenser coil; or, the fan is located on the wind valve away from the condenser coil Side.
6. The condenser according to claim 5, wherein the damper is located inside the casing, and the damper is an integral damper whose shape matches the cross-sectional shape of the casing; or, The number of the dampers is plural, and the plurality of dampers are arranged in an array to form damper assemblies whose shape matches the cross-sectional shape of the housing.
7. The condenser according to claim 5, wherein when the fan is located on a side of the air valve facing the condenser coil, the air valve is provided at the air outlet;

   The air valve is an integral air valve whose shape matches the shape of the air outlet; or the number of the air valve is plural, and the plurality of air valves are arranged in an array to form the shape and the air outlet Match the shape of the air valve assembly.
8. The condenser according to claim 6 or 7, wherein the number of the fan is one, and the fan is provided corresponding to the integral damper; or, the fan is provided corresponding to the damper assembly ;or,

   The number of the fans is plural, and the plural fans are arranged corresponding to the integral damper; or, the plural fans are arranged correspondingly to the plural dampers of the damper assembly.
9. The condenser according to any one of claims 1 to 7, wherein the shape of the damper is rectangular, circular, or polygonal.
10. An air-conditioning system, characterized by comprising the condenser according to any one of claims 1 to 9.

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