Constant-pressure inner shell for constant-temperature water mixing valve

Abstract

The constant-pressure inner shell is installed in a valve body outer shell, a water mixing valve element is installed at one end in the constant-pressure inner shell, the constant-pressure inner shell comprises an inner shell body and a constant-pressure assembly, the inner shell body is made of modified plastic, and a long water channel for conveying cold water to the water mixing valve element is formed in the inner shell body; the end face, close to the water mixing valve element, of the inner shell body is provided with a constant-pressure opening communicated with the long water channel. The end, close to the water mixing valve element, of the valve body outer shell is provided with a cover body covering the end of the inner shell body. The constant-pressure piston is arranged in the constant-pressure opening in an advancing and retreating movable mode, the spring piece is arranged between the constant-pressure piston and the cover body, the constant-pressure opening is closed by the constant-pressure piston, and the spring piece provides driving force for the constant-pressure piston to move towards the long water channel. According to the utility model, the constant-pressure effect can be achieved, and the pressure intensity during cold water conveying and ice condensation forming can be buffered respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of constant temperature water mixing valves, in particular to a constant pressure inner shell used for constant temperature water mixing valves. Background Art

[0002] Consumers are paying more and more attention to the quality of life, and the comfort of bathing water, unstable water temperature, and overheating of water all affect consumers' bathing experience. At present, household water heaters are equipped with a thermostatic mixing valve, which includes a valve body shell, a water-guiding inner shell arranged in the valve body shell, a mixing valve core arranged at one end of the valve body shell and the water-guiding inner shell, and a water divider arranged at the other end of the valve body shell and the water-guiding inner shell. The water-guiding inner shell forms two water channels for conveying hot water and cold water to the mixing valve core respectively. The supply of hot water and cold water is adjusted by the mixing valve core, so that hot water and cold water are mixed for consumers to use; and the water flow output after mixing is adjusted by the water divider, so that the water flow can be output from the shower head or faucet connected to the thermostatic mixing valve.

[0003] However, when the water-guiding inner shell is made of plastic material, it is only suitable for warm climates where water in the waterway will not condense into ice. When it is in cold climates where water in the waterway may condense into ice, the water-guiding inner shell is easily damaged under the pressure formed by ice condensation. Utility Model Content

[0004] The utility model aims to provide a constant pressure inner shell for a constant temperature water mixing valve.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A constant pressure inner shell for a constant temperature mixing valve, which is installed in a valve body outer shell and has a mixing valve core installed at one end thereof, comprises an inner shell body and a constant pressure assembly, wherein the inner shell body is made of modified plastic and is formed with a long water channel for conveying cold water to the mixing valve core; the inner shell body is provided with a constant pressure port connected to the long water channel at its end face adjacent to the mixing valve core; the valve body outer shell is provided with a cover body covering the end of the inner shell body at one end adjacent to the mixing valve core; the constant pressure assembly comprises a constant pressure piston which can be movably arranged in the constant pressure port and a spring member arranged between the constant pressure piston and the cover body, the constant pressure piston closes the constant pressure port, and the spring member provides a driving force for the constant pressure piston to move toward the long water channel.

[0007] As a further technical solution of the utility model: the inner shell body is provided with a water inlet connected to the long water channel at one end of its outer wall away from the mixing valve core, and a water outlet connected to the long water channel at one end of its inner wall adjacent to the mixing valve core.

[0008] As a further technical solution of the utility model: the diameter of the constant pressure port at one end adjacent to the long water channel is smaller than the diameter of the constant pressure port at one end away from the long water channel.

[0009] As a further technical solution of the utility model: the constant pressure piston is formed with a piston head matching the caliber of one end of the constant pressure port adjacent to the long water channel and a piston tail matching the caliber of one end of the constant pressure port away from the long water channel.

[0010] As a further technical solution of the utility model: the outer wall of the piston head is provided with a plurality of grooves at intervals, and each groove is correspondingly fitted with a sealing ring.

[0011] As a further technical solution of the utility model: the piston tail is provided with a mounting groove for the spring member to be installed, and a plug rod for inserting the spring member into the middle of the mounting groove is provided.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model proposes a constant-pressure inner shell for a constant-temperature mixing valve, through the cooperation between the inner shell body and the constant-pressure component, when cold water is delivered to the mixing valve core through a long water channel, the water pressure formed by the cold water delivery acts on the constant-pressure piston, and is balanced with the driving force provided by the spring part in the normal state for the constant-pressure piston to move toward the long water channel. When the temperature drops to the point where the water condenses into ice, the expanded ice body in the long water channel penetrates into the constant-pressure port, pressing the constant-pressure piston toward the constant-pressure port, compressing the spring part. The driving force after the compression of the spring part is balanced with the pressing force of the ice body on the constant-pressure piston, playing a constant-pressure role, respectively buffering the pressure during cold water delivery and ice condensation, effectively avoiding damage to the constant-pressure inner shell, and improving the durability of the constant-pressure inner shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of a thermostatic mixing valve.

[0014] Figure 2 Schematic diagram of a constant pressure inner shell for a thermostatic mixing valve.

[0015] Figure 3 for Figure 2 sectional view of .

[0016] Figure 4 This is the installation diagram of the cover body on the valve body shell.

[0017] Figure 5 This is a first-person view of the constant-pressure piston.

[0018] Figure 6 This is a second perspective view of the constant pressure piston. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the protection scope of the present invention.

[0020] See also Figure 1 , Figure 2 and Figure 3 A constant pressure inner shell for a constant temperature water mixing valve is installed in a valve body outer shell 10 and a water mixing valve core 20 is installed at one end thereof. The inner shell body 31 includes an inner shell main body 31 and a constant pressure assembly 32. The inner shell main body 31 is made of high-density modified nylon plastic and is formed with a short water channel (not shown) for conveying hot water to the water mixing valve core 20 and a long water channel 101 for conveying cold water to the water mixing valve core 20; the inner shell main body 31 is provided with a water inlet communicating with the long water channel 101 at one end of its outer wall away from the water mixing valve core 20, a water outlet communicating with the long water channel 101 at one end of its inner wall adjacent to the water mixing valve core 20, and a constant pressure port 102 communicating with the long water channel 101 at its end surface adjacent to the water mixing valve core 20; in conjunction with the reference Figure 4 The valve body shell 10 is equipped with a cover body 103 covering the end of the inner shell body 31 at one end adjacent to the mixing valve core 20; the constant pressure component 32 includes a constant pressure piston 321 that can be movably arranged in the constant pressure port 102 and a spring member 322 arranged between the constant pressure piston 321 and the cover body 103. The constant pressure piston 321 closes the constant pressure port 102, and the spring member 322 provides a driving force for the constant pressure piston 321 to move toward the long waterway 101.

[0021] It can be understood that the method of using the constant pressure inner shell of a constant temperature mixing valve according to the utility model is as follows: hot water is transported to the mixing valve core 20 through the short water channel, and cold water is transported to the mixing valve core 20 through the long water channel 101. The water pressure formed by the cold water transport acts on the constant pressure piston 321, and is balanced with the driving force provided by the spring member 322 in the normal state for the constant pressure piston 321 to move toward the long water channel 101; and when the temperature drops to the point where the water condenses into ice, the expanded ice body in the long water channel 101 penetrates into the constant pressure port 102, pressing the constant pressure piston 321 into the constant pressure port 102, compressing the spring member 322, and the driving force after the compression of the spring member 322 is balanced with the pressing force of the ice body on the constant pressure piston 321, thereby buffering the pressure formed by ice condensation and avoiding damage to the constant pressure inner shell.

[0022] Furthermore, in this embodiment, the diameter of the constant pressure port 102 at one end adjacent to the long water channel 101 is smaller than the diameter of the end away from the long water channel 101 , so as to limit the constant pressure piston 321 .

[0023] Further, in this embodiment, in combination with reference to Figure 5 , Figure 6The constant-pressure piston 321 is formed with a piston head 41 that matches the caliber of the constant-pressure port 102 at one end adjacent to the long water channel 101, and a piston tail 42 that matches the caliber of the constant-pressure port 102 at one end away from the long water channel 101; the piston head 41 is provided with a plurality of grooves 411 at intervals on its outer wall, and each groove 411 is correspondingly fitted with a sealing ring 412; the piston tail 42 is provided with an installation groove 421 for the spring member 322 to be installed, and a plug rod 422 is provided in the middle of the installation groove 421 for inserting from the spring member 322.

[0024] In summary, the utility model is a constant pressure inner shell for a constant temperature mixing valve, through the cooperation between the inner shell body 31 and the constant pressure assembly 32, when cold water is delivered to the mixing valve core 20 through the long water channel 101, the water pressure formed by the cold water delivery acts on the constant pressure piston 321, and is balanced with the driving force provided by the spring member 322 in the normal state for the constant pressure piston 321 to move toward the long water channel 101. When the temperature drops to the point where the water condenses into ice, the expanded ice body in the long water channel 101 penetrates into the constant pressure port 102, pressing the constant pressure piston 321 toward the constant pressure port 102, compressing the spring member 322. The driving force after the compression of the spring member 322 is balanced with the pressing force of the ice body on the constant pressure piston 321, playing a constant pressure role, buffering the pressure during the cold water delivery and the ice condensation, effectively avoiding damage to the constant pressure inner shell, and improving the durability of the constant pressure inner shell.

[0025] As long as it does not violate the creative idea of ​​the utility model, any combination of various different embodiments of the utility model should be regarded as the content disclosed by the utility model; within the technical concept of the utility model, any simple modification of the technical solution and any combination of different embodiments that do not violate the creative idea of ​​the utility model should be within the protection scope of the utility model.

Claims

1. A constant pressure inner shell for a constant temperature water mixing valve, installed in a valve body outer shell (10) and having a water mixing valve core (20) installed at one end thereof, characterized in that: The invention comprises an inner shell body (31) and a constant pressure assembly (32), wherein the inner shell body (31) is made of modified plastic and is formed with a long water channel (101) for conveying cold water to a water mixing valve core (20); the inner shell body (31) is provided with a constant pressure port (102) communicating with the long water channel (101) at its end surface adjacent to the water mixing valve core (20); the valve body outer shell (10) is provided with a cover body (103) covering the end of the inner shell body (31) at one end adjacent to the water mixing valve core (20); the constant pressure assembly (32) comprises a constant pressure piston (321) which is movably arranged in the constant pressure port (102) and a spring member (322) which is arranged between the constant pressure piston (321) and the cover body (103); the constant pressure piston (321) closes the constant pressure port (102), and the spring member (322) provides a driving force for the constant pressure piston (321) to move toward the long water channel (101).

2. The constant pressure inner shell for a constant temperature water mixing valve according to claim 1, characterized in that: The inner shell body (31) is provided with a water inlet communicating with the long water channel (101) at one end of its outer wall away from the water mixing valve core (20), and a water outlet communicating with the long water channel (101) at one end of its inner wall adjacent to the water mixing valve core (20).

3. The constant pressure inner shell for a constant temperature water mixing valve according to claim 1, characterized in that: The diameter of the constant pressure port (102) at one end adjacent to the long water channel (101) is smaller than the diameter of the end away from the long water channel (101).

4. The constant pressure inner shell for a constant temperature water mixing valve according to claim 3, characterized in that: The constant pressure piston (321) is formed with a piston head (41) matching the caliber of one end of the constant pressure port (102) adjacent to the long water channel (101) and a piston tail (42) matching the caliber of one end of the constant pressure port (102) away from the long water channel (101).

5. The constant pressure inner shell for a constant temperature water mixing valve according to claim 4, characterized in that: The piston head (41) has a plurality of grooves (411) spaced apart on its outer wall, and each groove (411) is correspondingly fitted with a sealing ring (412).

6. The constant pressure inner shell for a constant temperature water mixing valve according to claim 4, characterized in that: The piston tail (42) is provided with a mounting groove (421) for the spring member (322) to be installed, and a plug rod (422) is provided in the middle of the mounting groove (421) and is inserted from the spring member (322).

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