JPH0420776A - Drain filter for display case - Google Patents

Abstract

PURPOSE:To filter sludgelike refuse having fine grain size by providing a traylike second filter covering the lower surface opening of a first filter from below, mounted in a drain port, formed with many fine holes of mesh state having smaller diameter than that of the pores of the first filter to communicate interior with exterior, and opened at its upper surface. CONSTITUTION:The upper surface opening of a drain port 10 of an upper end opening of a cylinder 13 is blocked by an inverted cuplike first filter 21 having many holes 20 communicating interior with exterior in a mesh state, and opened at its lower surface. The lower end of a connecting rod 25 is connected to the center of the upper surface of a traylike second filter 27 mounted in the port 10 to cover the lower surface opening of the filter 21 from below, formed with many fine holes 26 having smaller diameter than that of the hole 20 of the filter 21 to communicate interior with exterior, and opened at its upper surface. Since fine dusts passed through the filter 21 are collected by the filter 27 to be reserved therein, refuse can be separated into rough and fine dusts to be collected.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is a system for filtering wastewater containing foreign substances such as drain and other foreign substances generated inside a case through a filter passage attached to a drain port formed at the inner bottom of the case. This invention relates to a drainage filter for a showcase that drains water outside the case.

[Conventional technology]

Showcases display products inside, and there are two types: cooling types that cool the inside to keep the displayed products fresh, and non-cooling types that do not cool the inside. For example, in a cooling type open showcase, the inside of the showcase Moisture contained in the air is cooled during the cooling process, forming condensed water or freezing, forming frost. If this frost adheres to the cooler or the like inside the case, it will cause a decrease in the cooling efficiency inside the case, so it is generally removed by spreading at regular intervals. In addition, in non-cooled open showcases, unlike cooled open showcases, condensed water or frost does not form inside, but it is possible to spray water on displayed raw vegetables or other products, wash the products with water, or The case may be washed with water to remove dirt from inside. Water generated inside the case, such as condensed water, water from melting frost, or washing water, flows along the inner wall of the case and collects at the bottom of the case, forming water at the bottom. It flows out of the case from the drain port. When the water generated inside the case flows out of the case from the drain port, a filter is installed on the inlet side of the drain port to prevent dust accumulated inside the case or kitchen waste from raw vegetables from flowing out of the case together. It is arranged.

This kind of traditional showcase drain filter is one of the second
2 and 3, FIG. 2 is a left side vertical sectional view showing the internal structure including a drainage filter of an open-front showcase to which the present invention is applied, and FIG. 3 is a drainage filtration of a conventional showcase. These are longitudinal cross-sectional views of the main parts of the vessels, with the right side of the figure being the front side.

In FIGS. 2 and 3, 1 is a case with a closed front. This case 1 includes a case body 2 having a C-shaped cross section and openings on both the left and right sides.
and a side plate 3 that covers openings on both left and right sides of the case 1, and an opening 4 that is open to the front of the case 1 is formed. Inside the case 1, a plurality of shelves 6 are vertically arranged, each of which is cantilever-supported at the rear end of the case 1 on the inner wall 5 at the rear of the case 1 to display products. A blower 8 is installed to cool the inside of the case 1 by blowing air to the evaporator 7, and a heat insulating material is sandwiched between the covering materials 9 forming the bottom and top surfaces of the case 1. A drain port 10 is formed at the bottom of the case main body 2 which is made to be flexible. The drain port 10 has a cylindrical body 13 whose axial direction is vertical and which vertically penetrates the bottom of the case main body 2. The drain port 10 has a flange 11 extending toward the outer circumference at its upper end and a drain pipe 12 connected to its lower end. It is formed of. The upper surface opening of the drain port 10, which is the opening at the upper end of this cylindrical body 13, has a large number of holes 14 communicating inside and outside formed in a mesh shape, and forms the bottom upper surface of the case body 2, as well as the upper surface of the flange 11 and the upper surface of the flange 11. The i! It is covered with a cup-shaped filter 16 placed in the chamber with an open bottom. This filter 16 has a flange-like projecting portion 17 formed at its lower end that projects outward in the outer circumferential direction, and projects downward from the surface of the projecting portion 17'F and fits into the drain port 10 with a so-called clearance fit. Its position in the horizontal plane is determined by a mating annular projection 18. In addition, the filter 16 is attached to the upper end of the filter]-6 so that it can be grasped when removing it.
A handle 19 is formed that projects upward from the upper end.

[Problem to be solved by the invention]

By the way, in such a showcase drainage filter, foreign matter such as dust that is generated and accumulated in the case 1 includes dust contained in the air that enters the case 1, or foreign matter that is displayed and displayed in the case 1. There is kitchen waste generated from raw vegetables, etc., and its particle size varies widely, ranging from fine dust like dirt to kitchen waste such as vegetable scraps. In order to capture the particles, it is necessary to make the holes 14, which are formed in a large number in a mesh pattern, fine. However, if the diameter of the holes 14 is made smaller, the filter 16 will easily become clogged quickly and the water will not flow easily, increasing the number of times the filter 16 must be cleaned. Therefore, condensed water generated inside, water from melting frost, drain or washing water, etc.] together with the water generated inside the pores 14
There is a problem in that the dust that has passed through flows out of the case 1 through the drain port 10, and this clogs the drain pipe 12. Furthermore, when cleaning the filter 16, it is necessary to remove dust that has accumulated on the bottom surface of the case 1 around the filter 16 before removing the filter 16. When the filter 16 is removed before removing the dust, the dust accumulated around the filter 16 may flow into the drain port 10 together with water and flow out of the case 1 through the drain pipe 12. There is also the problem that the drain pipe 12 may become clogged. Furthermore, the f-filter 16, whose position in the horizontal plane is regulated by a protrusion 18 where the inner circumferential surface and the outer circumferential surface of the drain port 10 fit through a large gap, is protected against vibrations during transportation to the installation location of the shimmy case. There is also the problem that it is easy to come off when the force is applied, and that the installation position must be confirmed before starting operation after installation.

This invention aims to prevent fine-grained waste, dirt accumulated around the filter, etc. from flowing out of the case through the drain port, clogging the drain pipe, and preventing it from coming off during transportation. Our objective is to provide a waste water filter.

[Means to solve the problem]

In order to solve the above-mentioned problems, in this invention, water flows in from the upper surface of the drain hole formed at the bottom of the case, which communicates with the inside and outside of the case, and which opens at the top surface of the bottom of the case. In a drainage filter of a showcase that filters waste water containing foreign substances such as drainage and garbage generated inside the case, which is drained out of the case through a drain pipe connected to the lower end, the drain filter is fitted into and removed from the drain port. A cup-shaped first filter, which is freely held and which closes the upper end of the drain port from above, has a mesh-like structure with a number of holes that communicate with each other inside and outside, and has an open bottom surface; The lower opening of the first filter is covered from below, and a large number of pores communicating with the inside and outside, which are smaller in diameter than the holes of the first filtration path, are formed in a network shape, and the upper surface is installed in the drain port. The second filter is provided with an open, dish-shaped second filter passage, and the second filter and the first filter passage are connected to each other.

[Effect]

This invention provides a drain hole formed in the bottom of the case, which communicates with the inside and outside of the case, and which is removably held in a drain port that opens at the top surface of the bottom of the case, and closes the opening at the upper end of the drain port from above. A cup-shaped first filter having a mesh-like structure with a large number of holes communicating between the inside and outside and an opening at the bottom, and a cup-shaped first filter that covers the bottom opening of the first filtration passage from below and is installed in the drain port. a dish-shaped second filtration passage whose upper surface is open and in which a large number of pores communicating with the inside and outside are formed in a network shape and whose diameter is smaller than that of the pores of the first filtration passage; Since the filter and the first filter are connected to each other, bulky garbage is captured by the first filter on the upper side and piled up on the bottom of the case around it, but fine garbage is trapped on the bottom. The garbage that is captured by the second dish-shaped filter passage on the side and accumulated inside the case, separates the garbage generated inside the case into coarse garbage and fine garbage. By making the diameter sufficiently small, even mushy dirt can be filtered through the strings of particle size without increasing the number of cleanings of the filter. Also, even if you accidentally try to remove the first filter path before removing the dust that has accumulated on the bottom of the case around the first filter, and the accumulated dust flows into the drain, this dust will flow into the second filter. The filter prevents it from flowing into the drain.

Furthermore, since the first filter path is detachably held in the drain port, the first filter and the first filter connected to each other may come off from the drain port due to vibration etc. during transportation, making it difficult to install them. The position will not shift.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a left vertical cross-sectional view of the main part of the showcase drainage filter of the present invention, and FIG. 2 is the object of the present invention. The left #v shows the internal structure of the open-front showcase, including the drainage filter! In each of the cross-sectional views, the right side of the figure is the front side, and parts common or the same as those in FIG. 3 are designated by the same reference numerals.

In FIGS. 1 and 2, 1 is a case with an open front, and this case 1 is composed of a case body 2 and a side plate 3, and an opening 4 is formed in the front of the case 1. . Inside the case 1, a plurality of shelves 6 whose rear ends are supported in a cantilever manner are arranged vertically on the inner wall 5 at the rear thereof, and an evaporator 7 and a blower fi, which are nine components of the cooling device, are arranged at the lower rear side.
8 are installed. A drain port 1o is formed at the bottom of the case body 2 which has a heat insulating property by sandwiching a heat insulating material between covering materials 9 formed on the upper and lower surfaces of the case 1, respectively.

This drain port 10 is formed into a cylindrical tube whose axial length is vertical, which vertically penetrates the bottom of the case body 2, with a flange 11 extending toward the outer circumference formed at the upper end and a drain pipe unit 2 connected to the lower end. It is formed of a shaped body 13. The upper surface opening of the drain port 10, which is the opening at the upper end of the cylindrical body 13, is formed in a mesh shape with a large number of holes 20 that communicate with each other inside and outside. It is placed on the upper surface of the flange 11 via an upper covering material 9 having an annular annular portion 15 covering the inner peripheral edge thereof, and
It is closed with a cup-shaped first rover 21 with an open bottom. The first rover 21 has a flange-shaped projecting portion 22 extending in the outer circumferential direction at its lower end, and a drain port 1 extending downward from the lower surface of the projecting portion 22.
0 to form a protrusion 23 that positions the first filtration passage 21. At the lower end of the protruding part 23, there is a protrusion 24 which protrudes from the outer circumferential surface of the protruding part 23 in the outer circumferential direction and is pushed by the inner circumferential surface of the drain port 10 and bends in the inner circumferential direction when the protruding part 23 is inserted into or removed from the drain port 10. This protrusion 24
is engaged with the lower end surface of the annular portion 15 to prevent the first filtration path 21 from coming off due to vibration or the like during transport of the showcase. A handle is formed at the upper end of the first filter passage 21, and a connecting rod 25 whose axial length is vertical is screwed to the center of the ceiling inside the filter 21 below the handle 19. The lower end of the connecting rod 25 is installed inside the drain port 10 and covers the lower opening of the first filter 21 from below. It is joined to the center of the upper surface of a dish-shaped second filtration passage 27 with an open upper surface and which has a network of communicating pores 26 formed therein. As a result, the first r-filter 21 and the second filter path 27 are connected, and the second filter 27. First filter 21 and connecting rod 2
5 constitutes the showcase's drainage filter.

In the above-mentioned configuration, the functions of the showcase drainage filter of the present invention will be explained below. Condensed water 2 Out of the garbage generated in case 1 that flows into the drain 10 together with the water generated in case 1 such as drain such as water from melted frost or water generated in case 1 such as flushing water, bulky waste is The fine dust that passes through the first filter 21 is captured by the filter 21 and accumulated in the second filter passage 27, and the dust is separated into large and fine dust. Furthermore, if the diameter of the pores 26 of the second filter 27 is made sufficiently small, even fine-grained sludge-like dust can pass through without increasing the number of times the filter path is cleaned. . Furthermore, even if the first filter 21 is removed before removing the dust accumulated on the bottom surface of the case body 2 around the first filter 21, the filter 21 is removed from the drain port 10 and the The dust accumulated around the r-filter 21 that flows into the drain port 10 is prevented from flowing into the drain pipe 12 by the second filter path 27. Furthermore, the first filtration passage 21 is configured so that it will not come off unless pulled up with a force greater than a predetermined level by a protrusion 24 that merges with the lower end surface of the annular part 15 at the lower end of the protrusion 23 that fits into the drain port 10. Since it is held by the drain port 10,
The first filtration path 21 and the second filtration device 27 connected to the first filtration device 21 via the connecting rod 25 will not come off due to vibration etc. during transport of the showcase, and their installation is in the wrong position. It never shifts.

〔Effect of the invention〕

According to this invention, the drain port formed in the bottom of the case and communicating with the inside and outside of the case and open at the top surface of the bottom of the case is held in a detachable manner, and the opening at the upper end of the drain port is opened from above. a cup-shaped first filter having a mesh-like structure with a large number of holes communicating between the inside and the outside and an opening at the bottom, and a cup-shaped first filter that covers the bottom opening of the first filtration passage from the bottom, and and a dish-shaped second filter with an open top surface and a network of a large number of pores communicating with the inside and outside, the diameter of which is smaller than the pores of the first filter. Since the second filter and the first filter path are connected to each other, among the dust generated in the case, bulky garbage and fine garbage are separated by the first filter path and the second filter path, respectively. By making the diameter of the pores of the second filter sufficiently small, even fine-grained sludge-like dust can be filtered through without increasing the number of times the filter passage is cleaned. Even when the first filter path is removed before removing the dust accumulated around the filter path, the second filter path prevents dust from flowing into the drain pipe. Furthermore, the first filter passage, which is removably held in the drain outlet, and the second filter passage connected to the first filter may come off the drain outlet due to vibrations during transportation, and their installation positions may shift. Never.

As a result, foreign matter such as dust contained in the waste water generated inside the case and flowing into the drain port is filtered through the first filter path and the second filter, and flows out of the case through the drain pipe. Cleaning the filter channel to remove clogged drain pipes separates and captures bulky debris and fine debris, making it easier to dispose of the trapped debris and cleaning the filter path after the showcase is installed. The effect is that the installation of the filter passage at the beginning of the operation does not require position confirmation.

[Brief explanation of the drawing]

Figure 1 shows the main parts left (II longitudinal sectional view) of the drainage filter for the showcase of this invention, and the second section includes the drainage filter for the showcase with an open front, which is the subject of this invention. 1.・Case, 2...Case body, 3...Side plate,
4... Opening, 5... Inner wall, 6... Boron, 7... Evaporator, 8... Air blower, 9... Covering material, 10... Drain port, 11... Flange , 12... drain pipe, 13.
... Cylindrical body, 14.20 ... Hole, 15 ... Annular part,
16... - overhang, 17.22... overhang, 18.2
3... Protrusion, 19... Handle, 21... First filtration path, 24... Protrusion, 25... Late knotting, 26...
- Pore, 27... second filtration path.

Claims (1)

[Claims] 1) The water flows through the upper surface opening of a drain port formed in the bottom of the case, communicates with the inside and outside of the case, and opens on the bottom top surface of the case, and passes through a drain pipe connected to the lower end of the drain port. In a drainage filter for a showcase that filters wastewater that is drained outside the case and contains foreign matter such as dust and other condensate generated within the case, an opening at the upper end of the drain port is removably fitted into the drain port. A cup-shaped first filtration passage with a number of holes communicating with the inside and outside formed in a mesh shape with an open bottom, and a bottom opening of the first filter are covered from below. and a dish-shaped second filter, which is installed in the drain port and has an open top surface and has a large number of pores communicating with the inside and outside that are smaller in diameter than the pores of the first filter. A drainage filtration path for a showcase, characterized in that the second filter and the first filter are connected to each other.