PTC (Positive Temperature Coefficient) defrosting system of automobile carbon dioxide heat pump air conditioner condenser

Abstract

The utility model belongs to the technical field of vehicle air conditioners, and particularly relates to a vehicle carbon dioxide heat pump air conditioner condenser PTC defrosting system which comprises a fixed supporting frame, condenser cooling fins are arranged on the fixed supporting frame, a refrigerant inlet and a refrigerant outlet are formed in the left side of the fixed supporting frame, and a liquid storage device is arranged on the right side of the fixed supporting frame. One end of the refrigerant inlet pipe is communicated with the refrigerant inlet, the other end of the refrigerant inlet pipe penetrates through the condenser cooling fins to be communicated with the upper end of the liquid storage device, one end of the refrigerant outlet pipe is communicated with the lower end of the liquid storage device, the other end of the refrigerant outlet pipe penetrates through the condenser cooling fins to be communicated with the refrigerant outlet, and PTC heating pieces are arranged on the condenser cooling fins. When the surfaces of the cooling fins of the condenser are frosted, the PTC heating pieces are started, defrosting is achieved, the defrosting time is shortened, the defrosting energy consumption is reduced, and the overall energy efficiency of the system is improved.

Description

Technical Field

[0001] This utility model belongs to the field of automotive air conditioning technology, specifically relating to a PTC defrosting system for a vehicle carbon dioxide heat pump air conditioner condenser. Background Technology

[0002] With the rapid development of electric vehicles, traditional gasoline-powered vehicle air conditioning systems can no longer meet their demands. Heat pump air conditioning systems, due to their high efficiency and energy saving, have become an ideal choice for electric vehicle air conditioning systems. Carbon dioxide, as a natural and environmentally friendly refrigerant, has advantages such as being non-toxic and non-flammable, showing great potential in automotive heat pump air conditioning systems. However, when operating in low-temperature and high-humidity environments, carbon dioxide heat pump air conditioning systems are prone to frost formation on the condenser surface, leading to a decline in system performance or even malfunction. Utility Model Content

[0003] Therefore, this invention aims to solve the problem in the prior art where condenser surfaces are prone to frost formation, leading to a decrease in system performance or even failure to operate normally.

[0004] Therefore, the technical solution adopted is a PTC defrosting system for a vehicle carbon dioxide heat pump air conditioner condenser, comprising: a fixed support frame, on which condenser heat sinks are provided; a refrigerant inlet and a refrigerant outlet are provided on the left side of the fixed support frame; a liquid receiver is provided on the right side of the fixed support frame; one end of the refrigerant inlet pipe is connected to the refrigerant inlet; the other end of the refrigerant inlet pipe passes through the condenser heat sinks and connects to the upper end of the liquid receiver; one end of the refrigerant outlet pipe is connected to the lower end of the liquid receiver; the other end of the refrigerant outlet pipe passes through the condenser heat sinks and connects to the refrigerant outlet; and a PTC heating element is provided on the condenser heat sinks.

[0005] Preferably, multiple PTC heating elements are evenly spaced on the condenser heat sink.

[0006] Preferably, the PTC heating element is in the shape of a long strip.

[0007] Preferably, the fixed support frame is provided with a connecting piece, and the connecting piece is provided with an installation groove.

[0008] Preferably, the edges of the connecting piece are rounded.

[0009] Preferably, the fixed support frame is provided with protrusions at both the upper and lower ends.

[0010] The present invention has the following advantages: carbon dioxide, in either gaseous or liquid form, passes through the refrigerant inlet and outlet pipes, and increases the contact area with the surrounding air through the condenser heat sink, thereby cooling or heating the surrounding environment. The liquid receiver is used to store liquid carbon dioxide. When frost forms on the surface of the condenser heat sink, the PTC heating element is activated to defrost, shortening the defrosting time, reducing defrosting energy consumption, and improving the overall energy efficiency of the system.

[0011] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0012] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] The components include: 1. Fixed support frame; 2. Condenser heat sink; 3. Refrigerant inlet; 4. Refrigerant outlet; 5. Liquid receiver; 6. Refrigerant inlet pipe; 7. Refrigerant outlet pipe; 8. PTC heating element; 9. Connecting piece; 10. Mounting groove; 11. Protrusion. Detailed Implementation

[0016] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component.

[0018] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] This utility model provides a PTC defrosting system for a vehicle carbon dioxide heat pump air conditioner condenser, such as... Figure 1 As shown, it includes: a fixed support frame 1, on which a condenser heat sink 2 is installed; a refrigerant inlet 3 and a refrigerant outlet 4 are installed on the left side of the fixed support frame 1; a liquid receiver 5 is installed on the right side of the fixed support frame 1; one end of a refrigerant inlet pipe 6 is connected to the refrigerant inlet 3, and the other end of the refrigerant inlet pipe 6 passes through the condenser heat sink 2 and is connected to the upper end of the liquid receiver 5; one end of a refrigerant outlet pipe 7 is connected to the lower end of the liquid receiver 5, and the other end of the refrigerant outlet pipe 7 passes through the condenser heat sink 2 and is connected to the refrigerant outlet 4; and a PTC heating element 8 is installed on the condenser heat sink 2.

[0021] Multiple PTC heating elements 8 are evenly spaced on the condenser heat sink 2, resulting in more uniform heating and improved heating efficiency. The PTC heating elements consist of PTC ceramic heating elements and aluminum tubes, offering advantages such as low thermal resistance and high heat exchange efficiency. The elongated shape of the PTC heating elements 8 allows for better heat dissipation during operation, maintaining a stable temperature output. A connecting piece 9 with a mounting groove 10 is provided on the fixed support frame 1 for easy bolt fixing. The edges of the connecting piece 9 are rounded to prevent damage to parts and extend its service life. Protrusions 11 are provided at both the upper and lower ends of the fixed support frame 1 for enhanced stability.

[0022] The beneficial technical effects of the above technical solution are as follows: Carbon dioxide refrigerant enters through refrigerant inlet 3 and contacts the condenser heat exchanger fins 2 through refrigerant inlet pipe 6 and refrigerant outlet pipe 7 respectively, completing heat exchange. Carbon dioxide, in gaseous or liquid state, passes through the refrigerant inlet pipe and refrigerant outlet pipe, and increases the contact area with the surrounding air through the condenser heat exchanger fins 2, thereby cooling or heating the surrounding environment. The liquid receiver 5 is used to store liquid carbon dioxide. When frost forms on the surface of the condenser heat exchanger fins 2, the PTC heating element 8 is activated to achieve defrosting, shortening the defrosting time, reducing defrosting energy consumption, and improving the overall energy efficiency of the system.

[0023] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A PTC defrosting system for a vehicle carbon dioxide heat pump air conditioner condenser, characterized in that, include: A fixed support frame (1) is provided with a condenser heat sink (2). A refrigerant inlet (3) and a refrigerant outlet (4) are provided on the left side of the fixed support frame (1). A liquid receiver (5) is provided on the right side of the fixed support frame (1). One end of the refrigerant inlet pipe (6) is connected to the refrigerant inlet (3), and the other end of the refrigerant inlet pipe (6) passes through the condenser heat sink (2) and is connected to the upper end of the liquid receiver (5). One end of the refrigerant outlet pipe (7) is connected to the lower end of the liquid receiver (5), and the other end of the refrigerant outlet pipe (7) passes through the condenser heat sink (2) and is connected to the refrigerant outlet (4). A PTC heating element (8) is provided on the condenser heat sink (2).

2. The PTC defrosting system for a vehicle carbon dioxide heat pump air conditioner condenser according to claim 1, characterized in that, PTC heating elements (8) are evenly spaced on the condenser heat sink (2).

3. The PTC defrosting system for a vehicle carbon dioxide heat pump air conditioner condenser according to claim 1, characterized in that, The PTC heating element (8) is long and narrow.

4. The PTC defrosting system for a vehicle carbon dioxide heat pump air conditioner condenser according to claim 1, characterized in that, A connecting piece (9) is provided on the fixed support frame (1), and an installation groove (10) is provided on the connecting piece (9).

5. A PTC defrosting system for a vehicle carbon dioxide heat pump air conditioner condenser according to claim 4, characterized in that, The edges of the connecting piece (9) are rounded.

6. A PTC defrosting system for a vehicle carbon dioxide heat pump air conditioner condenser according to claim 1, characterized in that, The fixed support frame (1) has protrusions (11) at both the upper and lower ends.

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