Angular InstantSearch是一个强大的搜索库，但在使用过程中，可能会遇到缓存数据不更新的问题。为了解决这个问题，可以使用刷新缓存服务。

1. 安装Angular InstantSearch库及相关依赖：

npm install angular-instantsearch algoliasearch --save

2. 在app.module.ts中引入相关模块：

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { AppComponent } from './app.component';
import { HttpClientModule } from '@angular/common/http';
import { ReactiveFormsModule } from '@angular/forms';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import {
  AlgoliaModule,
  AlgoliaConfig,
  InstantSearchService,
  FACET_TYPE,
  PRICE_TYPE,
} from 'angular-instantsearch';
import { environment } from '../environments/environment';

@NgModule({
  declarations: [AppComponent],
  imports: [
    BrowserModule,
    BrowserAnimationsModule,
    FormsModule,
    ReactiveFormsModule,
    HttpClientModule,
    AlgoliaModule.forRoot(),
  ],
  providers: [
    {
      provide: AlgoliaConfig,
      useValue: environment.algoliaConfig,
    },
    InstantSearchService,
    { provide: FACET_TYPE, useValue: 'regular' },
    { provide: PRICE_TYPE, useValue: 'number' },
  ],
  bootstrap: [AppComponent],
})
export class AppModule {}

3. 创建缓存服务并在必要的情况下刷新缓存：

import { Injectable } from '@angular/core';
import { InstantSearchService } from 'angular-instantsearch';

@Injectable({
  providedIn: 'root',
})
export class CacheService {
  private facets: any;

  constructor(private instantSearch: InstantSearchService) {
    this.facets = {};
  }

  public getFacets(index: string, query: string): Promise {
    return new Promise((resolve, reject) => {
      if (this.facets.hasOwnProperty(index)) {
        if (JSON.stringify(this.facets[index].query) === JSON.stringify(query)) {
          resolve(this.facets[index].facets);
        } else {
          this.refreshCache(index