Condensing pressure bypass valve application structure

Abstract

The utility model discloses an application structure of a condensing pressure bypass valve. The condensing pressure bypass valve application structure comprises a condensing pressure bypass valve, a compressor, an air-cooled condenser, a liquid accumulator, an expansion valve and an evaporator. A liquid storage device end connector of the condensing pressure bypass valve is connected with the liquid storage device through a pipeline. And a condenser end interface of the condensing pressure bypass valve is connected with the air-cooled condenser through a pipeline. Therefore, the compressor, the air-cooled condenser, the liquid storage device, the expansion valve and the evaporator form a circulation path. Furthermore, an exhaust end connector of the condensing pressure bypass valve is connected with the compressor. The device has the beneficial effect that the condensation pressure can be automatically adjusted.

Description

Technical Field

[0001] The utility model relates to the field of air conditioning, in particular to an application structure of a condensing pressure bypass valve. Background Art

[0002] There are two main problems in the design of air conditioning systems using air-cooled condensers: high ambient operation and low ambient operation. Low ambient operation is more complicated than high ambient operation. During low ambient operation, without good discharge pressure control, the air conditioning system may encounter problems in both the running cycle and the off cycle. The reason is: the pressure difference of the expansion valve affects the flow velocity of the refrigerant. If the condensing pressure is low, it will generally result in insufficient refrigerant to the evaporator. If the condensing pressure is not high enough, it will result in low suction pressure or evaporator ice. The main problem in the off cycle is the transfer of refrigerant to the condenser. Utility Model Content

[0003] The utility model aims to solve the technical problem that the condensing pressure of the existing air-conditioning system cannot be adjusted according to the ambient temperature, and provides a novel application structure of a condensing pressure bypass valve.

[0004] In order to achieve this purpose, the technical solution of the utility model is as follows: a condensing pressure bypass valve application structure, comprising: a condensing pressure bypass valve, a compressor, an air-cooled condenser, a liquid reservoir, an expansion valve and an evaporator; the condensing pressure bypass valve comprises: a valve body, a valve plate, a return spring and an elastic push rod, the valve body has a valve cavity extending along the vertical direction, the valve body further has an exhaust end interface, a liquid reservoir end interface and a condenser end interface, wherein the exhaust end interface is higher than the liquid reservoir end interface, the liquid reservoir end interface is higher than the condenser end interface, the valve cavity has the valve plate, and there is a valve plate below the valve plate. The return spring is provided with the elastic push rod above the valve plate, and the valve plate selectively connects the exhaust end interface with the liquid reservoir end interface or the condenser end interface with the liquid reservoir end interface according to the pressure of the condenser end interface; the liquid reservoir end interface of the condensing pressure bypass valve is connected to the liquid reservoir through a pipeline, and the condenser end interface of the condensing pressure bypass valve is connected to the air-cooled condenser through a pipeline, thereby, the compressor, the air-cooled condenser, the liquid reservoir, the expansion valve, and the evaporator form a circulation circuit; further, the exhaust end interface of the condensing pressure bypass valve is connected to the compressor.

[0005] As a preferred solution for the application structure of the condensing pressure bypass valve, the exhaust end interface and the liquid reservoir end interface are formed on the side wall of the valve body, and the condenser end interface is formed on the bottom wall of the valve body.

[0006] As a preferred solution for the application structure of the condensing pressure bypass valve, the exhaust end interface and the liquid reservoir end interface extend in a transverse direction, while the condenser end interface extends in a vertical direction.

[0007] As a preferred solution for the application structure of the condensing pressure bypass valve, an upper limit portion and a lower limit portion for determining the displacement range of the valve plate are formed inside the valve body.

[0008] As a preferred solution for the application structure of the condensing pressure bypass valve, the lower end of the elastic push rod abuts against the valve plate, and the upper end of the elastic push rod abuts against the spring assembly. The downward force of the elastic push rod is adjusted by changing the degree of spring compression of the spring assembly.

[0009] Compared with the prior art, the utility model has at least the following beneficial effects: automatic adjustment of the condensing pressure is achieved. In summer working conditions, the ambient temperature is high enough, and the condensing pressure is higher than the set value, that is, the combined force of the refrigerant pressure of the condenser end interface and the upward force of the return spring is greater than the downward force of the elastic push rod, and the valve plate is displaced to above the reservoir end interface, and the valve plate separates the reservoir end interface from the exhaust end interface. At this time, the refrigerant flows from the air-cooled condenser to the reservoir, and the system operates normally. In winter working conditions, the ambient temperature is too low and the condensing pressure is lower than the set value, that is, the combined force of the refrigerant pressure at the condenser end interface and the upward force of the return spring is less than the downward force of the elastic push rod, and the valve plate is displaced to below the reservoir end interface, and the valve plate separates the reservoir end interface from the condenser end interface. At this time, the refrigerant flows from the compressor to the reservoir to make up for the pressure difference of the expansion valve. At the same time, the pressure in the air-cooled condenser gradually increases until the pressure requirement is met. The valve plate is displaced upward, and the refrigerant flows from the air-cooled condenser to the reservoir, and the system operates normally.

[0010] In addition to the technical problems solved by the utility model, the technical features that constitute the technical solution, and the beneficial effects brought about by the technical features of the technical solution described above, other technical problems that can be solved by the utility model, other technical features included in the technical solution, and the beneficial effects brought about by these technical features will be further described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the condensing pressure bypass valve according to an embodiment of the utility model.

[0012] Figure 2 It is a structural schematic diagram of the valve body of the condensing pressure bypass valve according to an embodiment of the utility model.

[0013] Figure 3It is a structural schematic diagram of the application structure of the embodiment of the utility model. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below through specific implementations in combination with the accompanying drawings. It should be noted that the description of these implementations is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0015] See also Figure 1 and Figure 2 , shown in the figure is a condensing pressure bypass valve 1.

[0016] The condensing pressure bypass valve 1 comprises: a valve body 11, a valve plate 12, a return spring 13, an elastic push rod 14 and the like.

[0017] The valve body 11 has a valve cavity 15. The valve cavity 15 extends along the vertical direction.

[0018] The valve body 11 has an exhaust end interface 111, a reservoir end interface 112 and a condenser end interface 113. The exhaust end interface 111 is used to connect to the compressor 2 through a pipeline. The reservoir end interface 112 is used to connect to the reservoir 4 through a pipeline. The condenser end interface 113 is used to connect to the condenser through a pipeline. The exhaust end interface 111, the reservoir end interface 112 and the condenser end interface 113 are all connected to the valve cavity 15. Among them, the exhaust end interface 111 is higher than the reservoir end interface 112, and the reservoir end interface 112 is higher than the condenser end interface 113. Preferably, the exhaust end interface 111 and the liquid reservoir end interface 112 are formed on the side wall of the valve body 11, and the condenser end interface 113 is formed on the bottom wall of the valve body 11. Further, the exhaust end interface 111 and the liquid reservoir end interface 112 extend in a lateral direction, and the condenser end interface 113 extends in a vertical direction.

[0019] The valve plate 12 is inside the valve cavity 15. The valve plate 12 moves up and down along the valve cavity 15, so that it can move back and forth above and below the reservoir end interface 112. Preferably, an upper limit portion and a lower limit portion are formed inside the valve body 11 to determine the displacement range of the valve plate 12.

[0020] The return spring 13 is provided below the valve plate 12. The return spring 13 applies an upward force to the valve plate 12. The elastic push rod 14 is provided above the valve plate 12. The elastic push rod 14 applies a downward force to the valve plate 12. The downward force applied by the elastic push rod 14 to the valve plate 12 can be determined according to actual needs. Preferably, the lower end of the elastic push rod 14 abuts against the valve plate 12, and the upper end of the elastic push rod 14 abuts against the spring assembly 16. The downward force of the elastic push rod 14 can be adjusted by changing the degree of spring compression of the spring assembly 16.

[0021] If the refrigerant pressure of the condenser end interface 113 is higher, the combined force of the refrigerant pressure of the condenser end interface 113 and the upward force of the return spring 13 is greater than the downward force of the elastic push rod 14, and the valve plate 12 moves to above the reservoir end interface 112. At this time, the valve plate 12 separates the reservoir end interface 112 from the exhaust end interface 111, and the refrigerant flows from the condenser end interface 113 to the reservoir end interface 112, while the exhaust end interface 111 is in a closed state.

[0022] If the refrigerant pressure of the condenser end interface 113 is low, the combined force of the refrigerant pressure of the condenser end interface 113 and the upward force of the return spring 13 is smaller than the downward force of the elastic push rod 14, and the valve plate 12 moves to below the reservoir end interface 112. At this time, the valve plate 12 separates the reservoir end interface 112 from the condenser end interface 113, and the refrigerant flows from the exhaust end interface 111 to the reservoir end interface 112, while the condenser end interface 113 is in a closed state.

[0023] See also Figure 3 , the figure shows a condensing pressure bypass valve application structure (i.e., air conditioning system). The application structure includes: a condensing pressure bypass valve 1, a compressor 2, an air-cooled condenser 3, a liquid reservoir 4, an expansion valve 5 and an evaporator 6. The liquid reservoir end interface 112 of the condensing pressure bypass valve 1 is connected to the liquid reservoir 4 through a pipeline. The condenser end interface 113 of the condensing pressure bypass valve 1 is connected to the air-cooled condenser 3 through a pipeline. Thus, the compressor 2, the air-cooled condenser 3, the liquid reservoir 4, the expansion valve 5, and the evaporator 6 form a circulation circuit. Furthermore, the exhaust end interface 111 of the condensing pressure bypass valve 1 is connected to the compressor 2.

[0024] The working principle of the air-conditioning system is as follows: in summer conditions, the ambient temperature is high enough and the condensing pressure is higher than the set value, that is, the combined force of the refrigerant pressure of the condenser end interface 113 and the upward force of the return spring 13 is greater than the downward force of the elastic push rod 14, and the valve plate 12 moves to above the reservoir end interface 112, and the valve plate 12 separates the reservoir end interface 112 from the exhaust end interface 111. At this time, the refrigerant flows from the air-cooled condenser 3 to the reservoir 4, and the system operates normally. In winter working conditions, the ambient temperature is too low and the condensing pressure is low. At this time, the pressure difference across the expansion valve 5 is low and cannot meet the flow rate and flow of the expansion valve 5, resulting in low system efficiency and failure to achieve the predetermined effect. Since the condensing pressure is lower than the set value, that is, the combined force of the refrigerant pressure of the condenser end interface 113 and the upward force of the return spring 13 is less than the downward force of the elastic push rod 14, the valve plate 12 is displaced to below the reservoir end interface 112, and the valve plate 12 separates the reservoir end interface 112 from the condenser end interface 113. At this time, the refrigerant flows from the compressor 2 to the reservoir 4 to make up for the pressure difference of the expansion valve 5. At the same time, the pressure in the air-cooled condenser 3 gradually increases until the pressure requirement is met. The valve plate 12 is displaced upward. At this time, the refrigerant flows from the air-cooled condenser 3 to the reservoir 4, and the system operates normally.

[0025] The above only expresses the implementation mode of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A condensing pressure bypass valve application structure, characterized in that: include: Condensing pressure bypass valve, compressor, air-cooled condenser, receiver, expansion valve and evaporator; The condensing pressure bypass valve includes: a valve body, a valve plate, a return spring and an elastic push rod, the valve body has a valve cavity extending in the vertical direction, the valve body further has an exhaust end interface, a reservoir end interface and a condenser end interface, wherein the exhaust end interface is higher than the reservoir end interface, and the reservoir end interface is higher than the condenser end interface, the valve cavity has the valve plate inside, the valve plate has the return spring below, and the valve plate has the elastic push rod above, so that the valve plate can selectively connect the exhaust end interface with the reservoir end interface or the condenser end interface with the reservoir end interface according to the pressure of the condenser end interface; the reservoir end interface of the condensing pressure bypass valve is connected to the reservoir through a pipeline, and the condenser end interface of the condensing pressure bypass valve is connected to the air-cooled condenser through a pipeline, thereby, the compressor, the air-cooled condenser, the reservoir, the expansion valve, and the evaporator form a circulation circuit; further, the exhaust end interface of the condensing pressure bypass valve is connected to the compressor.

2. The condensing pressure bypass valve application structure according to claim 1 is characterized in that: The exhaust port interface and the liquid storage port interface are formed at the side wall of the valve body, while the condenser port interface is formed at the bottom wall of the valve body.

3. The condensing pressure bypass valve application structure according to claim 2 is characterized in that: The exhaust end interface and the reservoir end interface extend in a transverse direction, while the condenser end interface extends in a vertical direction.

4. The condensing pressure bypass valve application structure according to claim 1 is characterized in that: An upper limit portion and a lower limit portion for determining the displacement range of the valve plate are formed inside the valve body.

5. The condensing pressure bypass valve application structure according to claim 1 is characterized in that: The lower end of the elastic push rod abuts against the valve plate, and the upper end of the elastic push rod abuts against the spring assembly. The downward force of the elastic push rod can be adjusted by changing the spring compression degree of the spring assembly.

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